Get a screen: your own TFT display. The world of PC peripherals Pinout of the 30 pin matrix from the monitor

It is necessary to know the matrix connectors of laptops in order to determine which matrix model is suitable for replacing the damaged screen element. There is no need to purchase original components; most often you can find analogues from other manufacturers that have the same characteristics. This can be done using information about the technical parameters of your laptop; information about the installed type of matrix can be found on it itself or using special programs.

The matrix connector of a laptop is determined by the number of contact pins; their number can be 20, 30 or 40. The most common are 30- and 40-pin connectors; they are present on almost all laptop models. 30-pin connectors are installed on tube matrices and are considered obsolete. If a laptop was released a long time ago, it can be difficult to find a similar part from the same manufacturer; you have to select analogs that match not only the connector, but also a number of additional technical characteristics.

If you choose an LED matrix, you need to pay attention to the cable connector: it can be right-sided or left-sided; with the right-side option, the cable will be longer.

You can list several common and rarely found connectors for a laptop matrix:

• 14 pin and 20 pin are exotic, which is still found on old-style laptops. It is difficult to select components for an outdated laptop; sometimes it is easier and cheaper to simply purchase a new device than to select spare parts for replacement.
• 20 pin slim, another name for such a “comb” connector. This is another exotic option; today such a connector can only be found on technically outdated models.
• 20 pin new standard. This type of connector is used on matrices with a diagonal of less than 14 inches; today this option is relatively rare.
• 30 pin is a common solution; the connector is used on matrices with a diagonal of 14-20 inches.
• 40 pin is the most common option today; it is installed mainly on matrices with a diagonal of 15.6 inches. It is these matrices that are produced by manufacturers LG-Philips, Samsung, Chi Mei and many others. Using the compatibility tables, you can select models that are identical in all technical parameters.

Replacing a laptop matrix connector requires advanced soldering skills, so it is not recommended to undertake such work yourself. It is extremely difficult to completely restore a damaged connector; usually you still have to replace the damaged part with a new one. The pinout of the laptop matrix connector and their mutual compatibility are indicated in tables on the manufacturers' websites, as well as on specialized forums.

Selecting a matrix suitable for replacement

Despite the fact that for several years now manufacturers have been producing matrices with standardized connectors, difficulties still arise when choosing analogues. The easiest way to solve the problem is to use the help of our online store consultants. Depending on the laptop model, our specialists will select all the components necessary for repair; we will select for you original parts or fully compatible analogues from other manufacturers.

Employees service centers additional discounts are guaranteed, and professional advice on replacing components is provided. Take advantage advantageous offer- in our store there is a wide range of matrices for laptops. If you cannot figure out which matrix to choose, call us and we will select the optimal model for you.

Hi all. Lately, you can often see articles and videos about converting old matrices from laptops and dead monitors into full-fledged TVs. This kind of alteration will be discussed in this article, but before that, a little background.

About a year ago, they brought me a monitor for repairs in which the backlight power cord had caught fire. The matrix itself was not damaged, but part of the organic glass, which serves as a diverging lens, burned out. Also, 2 backlight lamps burst and the inverter itself burned out. Having told the owner the cost of repairs, he decided not to repair it. After some time, I bought this monitor for spare parts.

A few months later, I decided to try to restore this monitor, using a minimal budget. Since you couldn’t expect a beautiful picture, instead CCFL I installed the usual lamps LED strip on 12 volts, having previously selected the brightest one on the radio market. To implement the backlight, I used field-effect transistor, which supplied power to the LEDs, receiving a signal to turn on the backlight from the main board. I will describe how this is implemented below. The monitor started working, and I was very pleased with the picture quality. If you look closely, you could see small covenants on top, but they didn’t bother me.

So the monitor worked for several months, exactly until I needed another TV, not a large diagonal. To implement this task, I decided to use a universal scaler (monitor controller).

What is needed to convert a monitor to a TV?

For the remodel we will need:

Choosing a scaler

In fact, there are a huge variety of scalers, but I will only consider those that are suitable specifically for converting a monitor into a TV. These boards are not called universal for nothing, since they support almost all matrix models that exist. After reading various articles about these boards, I found out that 3 universal scalers are most suitable for implementing my task.

Monitor backlight

Monitor backlighting can be done in 2 ways: using lamps or Led LEDs. To determine the type of backlight, you need to disassemble the monitor and get to the matrix.

After disassembly, pay attention to which wires come out from the side of the matrix. If the connectors are of the same type as in the picture below, then you have lighting on the lamps, the so-called backlight.

CCFL backlight

In this case, you need to order an inverter for CCFL lamps.

The number of lamp connectors determines how many channels an inverter is needed for. Typically, monitors use 4-lamp inverters. If you want to remake the matrix from a laptop, then only one lamp is used, and an appropriate inverter is needed.

If there are no such wires, and there is a 6-pin connector at the bottom of the monitor, then you are using Led backlight Then you need an LED inverter.

LED inverter

If no wires come out from the matrix, but one cable is connected, then you do not need an inverter, it is already on the matrix board itself.

Selecting a cable from the scaler to the monitor

The choice of cable must be taken very seriously, since the performance of the entire system depends on it. I didn’t buy the cable, but remade the old one according to the datasheet, but you can buy a ready-made one. Decide for yourself what to choose, but I will describe both methods.

To determine the type of cable, go to the website http://www.panelook.com and enter the name of our matrix in the search bar. You can see the name itself on the sticker located on the back of the matrix.

sticker on the matrix. Model CLAA170EA 07Q

After this, we receive all the necessary information that we also need to select the firmware.

Matrix information.

Let's look at it in more detail.
— Diagonal Size: The size of our matrix. In our case, 17 inches.
—Pixel Format: Screen expansion. Key information to select the scaler firmware. In my case 1280(RGB)×1024
— Interface Type: This is our connector for the cable. My matrix requires a 30-pin cable, the LVDS bus must have 2 8-bit channels. I will post links to popular trains at the end of the article. I will remake this cable from an old one, I will describe the process later.
— Power Supply: Matrix supply voltage. In my case it is 5 volts.
— Light source: Here is all the information about the backlight. CCFL means that a 4-lamp backlight is used, so you need a corresponding inverter. Above, I described how to choose a suitable inverter without using this site.

power unit

The power supply requires 12 volts. Its power depends on the diagonal of the monitor and must be at least 4 amperes. If there is not enough space in the monitor case, then it is better to buy a remote power supply, but I will use a tablet-type power supply, which I will install in the monitor case.

The process of converting a monitor to a TV

Since my monitor is not the latest, I chose a scaler without support for all the bells and whistles, that is LA.MV29.P. If you choose any other scaler, their connections are identical, you will just use the appropriate firmware.

Delivery was only 15 days. The kit includes the board itself, a remote control and an IR receiver. I actually got the remote control with Chinese inscriptions, but in the links all the scalers will have an English keyboard.

I will be remodeling the LG Latron 17 inch monitor

First of all, I disassembled the monitor and removed all the insides.

I removed all the boards, along with the metal casing.

After disassembling, I began to look for the most convenient place to install the scaler. Since I have an old-style monitor, and it has a lot free space, then the board fits freely there along with the power supply. I installed the board in the upper part of the monitor, and used a soldering iron to make holes for the scaler outputs.

Scaler installation location

It turned out something like this.

In order not to forget, I immediately set the matrix power jumper to the 5 volt position. You choose the position based on the datasheet for your matrix, or use the panelook.com website and look at the value in the Power Supply field.

Jumper that determines the matrix supply voltage

Next, I started connecting the buttons. The buttons connect very easily. On old panel keyboard, I removed all the extra resistors and jumpers, and left only the buttons. Next, one end of all the buttons was soldered together with a conductor, and connected to the GND pin (to ground “-”), and the wires were brought out from the board to the second. Which button will do what on the old board, decide for yourself. I only have 5 buttons on my panel, so I sacrificed the OK button.

Designation of connections

Explanation of symbols

K0- Power button
K1— Volume +
K2— Volume —
K3— Select button (OK)
K4— Menu button
K5— Channel +
K6- Channel -

connecting buttons on the diagram

The GRN and RED pins indicate the status of the LED. This was done for two color LEDs with 3 legs. One leg is connected to ground “-“, the second and third legs are connected to GRN and RED. I didn’t have such an LED, so I connected only the red LED, which lights up when the TV is in standby mode, and goes out when the TV turns on.

According to the IR receiver, there should be no problems, everything is described in the picture.

I didn’t find a connector, I just soldered the wires to the pins.

This is how I laid out the wires

As I said earlier, I used my own cable. It was inserted into the scaler connector normally, but had a completely different pinout. To avoid confusion, I removed all the wires from the connector by pressing the corresponding tab on the contact.

The process of removing wires from the connector

Scaler pinout

I took the matrix pinout from the datasheet. This is what she looks like.

CLAA170EA07Q matrix pinout

The connection appears to be inverse, on one side of the matrix Vcc these are contacts 28,29,30, from the matrix side these are 1,2,3.
Please note that the signals coming out of the scaler are preceded by the letter “ T"(transfer), and on the matrix R(received).

For example, we connect the signal from the scaler TXO1- to the pin of the matrix RXO1-, to put it simply, we just don’t look at the first letter.

Connector set.

When I finished with that, I started connecting the backlight. Since my backlight is not standard, but already redesigned, I had to use it as a key that would turn on the backlight when a signal was sent from the scaler. For those who are interested in how I connected the transistor, the diagram is below.

Connecting an NPN field switch as a key

In your case, you will only need to connect the inverter to the connector, and everything will work.

Designation of pins for the monitor backlight

Consequences of a previous monitor failure, traces of a burnt wire for the backlight

Having collected everything to the heap, all that remains is to flash the scaler.

Scaler firmware

The choice of firmware must be taken seriously, since if you choose the wrong firmware, you can only reflash the scaler through the programmer.

Let's consider the choice of firmware for the CLAA170EA 07Q matrix.

Matrix information.

We receive the following information: 2 channels, 8 bits, extension 1280 x 1024, power supply 5 volts. After downloading the firmware, we look for a similar one among the files.

Firmware selection.

In the file, select the desired extension, bits and matrix supply voltage. We go into this folder and see a file that needs to be unzipped and placed in the root of the flash drive.

We connect the flash drive to the scaller and supply power to the board. The LED on the panel should start blinking. We wait until the LED stops blinking, after which the TV can be turned on using the remote control or button.

The firmware is here:

1. For a tuner with T2, the seller sends the firmware to the cutter after purchase. He sent me this: Z.VST.3463.A

After the firmware, I immediately went to the language settings and set the language to Russian. Next, I launched an auto search.

Auto channel search.

The scaler receives channels perfectly. I ordered the speakers later, so I temporarily glued the ones I had on hand with thermal glue.

The LVDS interface is currently the most common interface of all used in desktop monitors and laptop matrices. Compared to TMDS, the LVDS interface provides higher throughput, which has led to the fact that LVDS has, in fact, become the front-end standard for modern LCD panels.

LVDS (TIA/EIA-644) – Low Voltage Differential Signaling is a differential interface for high-speed data transmission. The interface was developed by National Semiconductor in 1994. LVDS technology is reflected in two standards:

1. TIA/EIA (Telecommunications Industry Association/Electronic Industries Association) - ANSI/TIA/EIA-644 (LVDS)

2. IEEE (Institute for Electrical and Electronics Engineering) - IEEE 1596.3

In addition, this interface is often used under the brand name FPD-Link TM. The second copyright holder for this bus is Texas Instruments, which produces it under the FlatLinkTM brand name.

The LVDS interface was later refined to increase bandwidth and increasing the reliability of data transmission, and it was also produced by other developers under different trademarks, which introduced some ambiguity into the classification of interfaces and one gets the impression that there are many different buses. For example, the varieties and trademarks of the LVDS interface are:

- FPD-Link TM;

- FlatLinkTM;

- PanelBusTM;

- OpenLDITM.

The LVDS interface is similar in many ways to the TMDS interface, especially in terms of architecture and circuit design. Here we are also dealing with differential serial data transmission. This means that the LVDS interface implies the presence of transmitters and receivers that perform exactly the same data conversion as in TMDS (which was discussed in some detail in the first part of the article). Therefore, we will dwell only on the features that distinguish the LVDS interface from the TMDS interface.

LVDS is capable of transmitting up to 24 bits of information per pixel clock, which corresponds to the True Color mode (16.7 million colors). In this case, the original parallel data stream (18 bits or 24 bits) is converted into 4 differential pairs of serial signals with the original frequency multiplied by seven times. The clock frequency is transmitted over a separate differential pair. The operating signal levels are 345 mV, the transmitter output current ranges from 2.47 to 4.54 mA, and the standard load is 100 ohms. This interface allows for reliable data transmission with a bandwidth of over 455 MHz without distortion over a distance of up to several meters.

The LVDS transmitter consists of four 7-bit shift registers, a frequency multiplier and output differential amplifiers (Fig. 18).

Fig.18

Quite often in the literature, in documentation and on diagrams you can find a slightly different designation for LVDS interface signals. So, in particular, such designations as RX0+/-, RX1+/-, RX2+/-, RX3+/- and RXC+/- are widely used.

The input signal CLK is a pixel frequency signal ( Pixel Clock) and it determines the frequency of formation of R/G/B signals at the transmitter input. The frequency multiplier multiplies the CLK frequency by 7 times. The resulting clock signal (7xCLK) is used to clock the shift registers and is also transmitted along the differential lines CLKP/CLKM.

The 7-bit parallel code is loaded into the transmitter shift registers using a gate signal generated by the transmitter's internal control logic. After loading, the bits begin to be sequentially “pushed” onto the corresponding differential line, and this process is clocked by the 7xCLK signal.

Thus, on each of the four differential data lines (Y0P/YOM, Y1P/Y1M, Y2P/Y2M, Y3P/Y3M) a 7-bit serial code is generated, transmitted synchronously with the clock signals on the CLKP/CLKM line.

The reverse conversion of serial code to parallel is carried out by the receiver included in the LCD panel, and therefore it is quite natural that the receiver is, in fact, a mirror image of the transmitter.

The LVDS interface is used to transmit both 18-bit color code (3 colors of 6 bits each) and 24-bit color (3 base colors of 8 bits each). But unlike the TMDS interface, here each color is not allocated a separate differential pair, i.e. Each LVDS differential channel is designed to carry individual bits of different colors. In addition to color signals, the following must also be transmitted to the LCD panel:

- horizontal synchronization signal (HSYNC);

- frame synchronization signal (VSYNC);

- data enable signal (DE).

These control signals are also transmitted over differential channels intended for data transmission, i.e. along the YnP/YnM lines. Thus, there are two options for the format of the data transmitted to the LCD matrix.

The first option corresponds to an 18-bit color code, and at the same time 21 bits of data are supplied to the transmitter input. The second option is 24-bit color code, in which there should be 27 bits of data at the transmitter input. The difference between these two options is formally small and is reflected in Table 3.

Table 3.

A general diagram explaining the architecture of the LVDS interface is presented in Fig. 19.

Fig.19

Which color bits and service signals will be transmitted over the differential line is determined by the signals supplied to the input of the corresponding shift register of the transmitter. In this case, of course, it is necessary to understand that the receiver located on the LCD panel will convert to reverse order and its output will be exactly the same data format. And this all means that a very specific LCD panel is tied to a specific monitor control board. This connection of the LCD panel to the control board, of course, is inconvenient for most manufacturers, because there is no unification. That is why, de facto, almost all manufacturers of LCD displays and LCD panels used a very specific input data format, which made it possible to connect any panel to any board. This data format became the basis of the standard developed by the VESA association, and today we can say that LVDS has become a unified interface, which clearly defines the transmission protocol, input data format, connector and connector pinout. We will rely on this standard, since the panels currently produced correspond exactly to it, and it is almost impossible to come across unique LVDS interfaces.

So, the standard version of the distribution of transmitter input signals between its shift registers is presented in Fig. 20.

Fig.20

As a result, the data transfer protocol over differential channels of the LVDS interface looks as shown in Fig. 21.

Fig.21

As a careful analysis of Fig. 20 and Fig. 21 shows, the interface is highly versatile, as a result of which, in fact, the issue of compatibility of LCD panels and control boards has been resolved. Moreover, the monitor developer has the opportunity to practically not worry about matching the color bit depth of the scaler and the LCD panel. So, for example, if the developer decided to use a cheaper LCD panel (with 18-bit color coding), then the RX3 differential channel is not used in the interface, as a result of which the high-order bits of the color are simply “cut off”. But when developing a more expensive monitor model, which uses an LCD panel with 24-bit encoding, the manufacturer uses the same control board and does not even change the program code of its microprocessor, and simply connects this panel through a fully functional interface - and everything works. In addition, a monitor manufacturer can use any matrix from any manufacturer in its product, as long as it is equipped with an LVDS interface and has the appropriate form factor (which, by the way, is also being standardized). Of course it's wide the lineup monitors are not always obtained in such a primitive way, but this method should not be underestimated either. Another positive aspect of using LVDS is that all this gives wide opportunities to service specialists when repairing LCD monitors.

In principle, the LVDS interface can be used to transmit any digital data, as evidenced by the widespread use of LVDS in the telecommunications industry. However, it is still most widespread as a display interface. To increase the throughput of this interface, the developer company (National Semiconductor) expanded the LVDS interface and doubled the number of differential pairs used for data transmission, i.e. now there are eight of them (see Fig. 22).

Fig.22

This extension is called LDI - LVDS Display Interface. In addition, the LDI specification improves line balance across DC due to the introduction of redundant coding, and gating is performed on each edge of such a signal (which allows doubling the amount of transmitted data without increasing the clock frequency). LDI supports data rates up to 112 MHz. In the documentation, this specification is also found under the name OpenLDITM, and the term “dual-channel LVDS” resonated with domestic experts.

It is interesting to note that the LVDS interface (LDI) has 8 differential pairs for data transmission and two differential pairs for clock signals, i.e. LDI has two virtually independent full-featured channels, each of which is clocked with its own clock signal. Recall that in dual-channel TMDS, both data channels are clocked by a single clock signal.

Naturally, the presence of two channels allows you to double the interface bandwidth, since information about two pixels can be transmitted in one pixel clock cycle. In this case, one channel is intended for transmitting even screen points (Even channel), and the second is intended for odd screen points (Odd channel).

The use of single-channel or dual-channel LVDS is determined by the following characteristics of the LCD panel and monitor:

- Screen size;

- resolution;

- frame rate, i.e. determined by the operating mode.

The LVDS interface connector can be considered standard today, i.e. the number of connector pins and the order of signal distribution across the pins is the same for all LCD panels of any manufacturer. The only difference between the connectors may be their design:

- connector for flat ribbon cable or traditional connector for ordinary connecting wires;

- presence or absence of a screen;

- presence or absence of additional grounding contacts at the edges of the connector;

- connectors with different pitches between contacts, etc.

The standard LVDS connector is considered to be 30-pin, although there may be two or four more pins on its sides that perform a “grounding” function. These contacts in the standard version are not numbered, but are designated as “Frame” and are connected to the circuit ground. However, sometimes on diagrams you may come across that the LVDS connector is designated as 32-pin. In this case, it should be remembered that the outermost contacts (1 and 32) are precisely the “Frame” contacts, without which the interface immediately turns into a standard 30-pin connector. The order of distribution of LVDS interface signals among the contacts of the connecting connector and their traditional designation are presented in Table 4. The 30-pin connector is fully functional and is intended for two-channel LVDS. In LCD panels with small size screen (15-inch), most often, single-channel LVDS is used, because its throughput is quite sufficient. In this case, the part of the interface that corresponds to the odd LVDS channel is used, while the lines of the even channel may be completely absent.

Table 4.

The LVDS interface also supplies the supply voltage for the elements of the LCD matrix. This voltage, referred to as VCC in Table 4, can be one of three voltage ratings:

- +3.3 V (usually for 15-inch matrices);

- +5V (for 15-inch and 17-inch matrices);

- +12V (usually for 19-inch matrices and larger).

So, the LVDS interface provides the best versatility of all interfaces for connecting the LCD panel to the main monitor board. As with TMDS, there must be an LVDS transmitter on the main board of the monitor, and the LCD panel must include an LVDS receiver. Both the transmitter and the receiver can be either separate microcircuits (which is quite rare today), or they can be part of the scaler and TCON, respectively.

If the transmitter is implemented in the form of a separate microcircuit, then it is necessary to take into account that each such microcircuit is a functionally complete device that provides conversion and transmission of data from one channel. Naturally, in this case, to organize two-channel LVDS, you will have to use two identical transmitter chips. And here it is quite clear that one transmitter chip represents an even data channel, and the second – an odd one. An example of such an interface is presented in Fig. 23, which shows the LVDS interface of the Samsung SyncMaster 172T monitor. This monitor uses NT7181F chips as LVDS transmitters. In the diagram, you should note that the 30-pin LVDS connector (CN402) is a mirror image of the pinout that was presented in Table 4 (i.e. in Table 4 we presented the distribution of signals across the connector contacts on the side of the LCD matrix).

Fig.23

It should be mentioned that sometimes, nevertheless, you can find non-standard LVDS interface connectors. This is especially true for monitors of already outdated models. The 20-pin connector has become widespread, which is often found in monitors from LG, Philips, Samsung and other brands that use matrices from these manufacturers. The 20-pin connector was used for both single-channel LVDS and dual-channel LVDS. It should be noted that there are no standards for the distribution of signals across the contacts of these connectors. So, in particular, Samsung quite widely used the so-called 20-pin LVDS connector in 15-inch panels, although in reality there are 22 pins on this connector. This connector was intended for single-channel LVDS, and the signal distribution on it is given in Table 5.

Table 5.

An example of a single-channel LVDS interface with a 22-pin connector and a separate transmitter chip is shown in Fig. 24.

Fig.24

Philips and LG also used a 22-pin connector, but unlike Samsung, this connector had a completely different pinout (see Table 6).

Table 6.

Additionally, relatively modern 15-inch LG monitors, such as the LG Flatron L1510P, used a real 20-pin single-link LVDS data connector. The distribution of signals across the contacts of this connector is given in Table 7.

Table 7.

Another version of the 20-pin LVDS interface connector was used by Philips and LG in 15/17 and 18-inch matrices, in which data transmission was carried out using 2-channel LVDS. At the same time, the 20-pin connector was intended exclusively for data transmission and does not have power and ground contacts. The supply voltage and signal ground of the LCD matrix in this case are routed to another connector, usually a 5-pin one. The distribution of two-channel LVDS signals across the contacts of a 20-pin connector in Philips and LG monitors is presented in Table 8.

Table 8.

As can be seen from all this, when using a 20-pin connector on an LCD matrix, we can talk about panel compatibility various manufacturers there is no need to say (this is exactly the problem they tried to solve by introducing a standard 30-pin connector).

Once again, please note that the pinout of the connectors in all tables is presented from the LCD matrix side. This means that on the main monitor board it is in reverse order.

Good day! Today I will tell you how, with the help of one parcel from China and the trash that is lying around your house make a TV, or at least monitor. The fact is that many probably still have ancient laptops lying around, some damaged monitors, non-working tablets and all this can be put to use. Well, yes, the matrix cannot be connected separately, but with the help of a simple device, namely universal scaler, Can connect any matrix to HDMI,VGA or even make a TV.

And so what we have.

I ordered myself a rather advanced scaler.

And I came across this tablet, it’s still alive, although the sensor is already broken, the battery doesn’t hold up so well, it’s all scratched, but you can borrow the matrix from it.

We disassemble the tablet to gain access to the matrix.

We turn off all the cables and throw everything aside except the matrix.

The matrices have quite standard connection, in them LVDS interface And standardized range of connectors. You can see which connector your matrix has by appearance or by datasheet. There is a separate cable for each type of matrix. For example, I have several loops.

1 is an older standard, where matrices were still lamp-illuminated.

2 – more new standard, where the LED matrices go.

3 – these connectors are found in 7-inch tablets and various small ones.

On the other hand, the connectors are more or less standardized and fit into almost any universal scaler.

I have never used such a scaler before, it has many more functions compared to those I used, even remote control included.

Before connecting the matrix it is necessary configure the board correctly(scaler) so as not to spoil the matrix. I definitely recommend downloading the datasheet for the matrix first, so that you know what the matrix resolution is, what the logic and backlight power supply is.

The first place to start is to look from left to right. There are a number of jumpers on the scaler, the top left one configures logic voltage, it must be selected based on your matrix. As a rule, laptop matrices have a power supply of 3.3 volts, in ordinary monitors it is 5 volts, but there is also a 12 volt jumper; to be honest, I don’t know where this voltage is used. We immediately change this jumper so as not to burn our matrix, in my case the logic is 3.3 volts.

The next set of jumpers takes longer to set the screen resolution. I would like to note that in addition to the screen resolution, the bit depth also changes. On the back of the scaler there is a cheat sheet that says resolution and bit depth. The bit depth can be 6-bit and 8-bit; visually, 6- and 8-bit connectors differ in the number of contacts. You can again read the information about the bit depth of your matrix in the datasheet.

Before moving on to the matrix, you need to study the datasheet; it is very easy to find by looking at the sticker located on the back of the matrix. In my case it's " LP101WX1" In the datasheet for the matrix, we are interested in 3 or 4 points, depending on whether it is an LED matrix or a matrix with a cold cathode lamp. First of all, let’s determine what resolution the matrix is, just flip through the datasheet and look for this entry. Here in our table it is indicated pixel format(Pixel Fotmat) that is, it is 1280x800, respectively, you need to select this resolution using the jumpers on the sayler. Interface width corresponds to the number of colors, in this case it is 6-bit or 262,144 colors. These two parameters are enough for us to select the correct mode of operation of the matrix.

But in order for the matrix to survive, we still need set the correct voltage, let's scroll further. And here we have a pivot table electrical characteristics. Logic, that is, logic power supply, logic supply voltage (Power Supply Input Voltage) from 3.0 to 3.6 volts, typical 3.3 volts, accordingly we set the matrix power supply jumper to 3.3 volts.

And just in case, look at the backlight, this item should only be looked at if the matrix is ​​with LED backlight. As it is written on the board, the board is powered by 12 volts, and our backlight works from 5 to 21 volts, 12 will be just right. I haven’t seen other matrices that have a supply voltage of 5 volts, but I assume that this could happen if you use a matrix from any small tablet. Therefore, be sure to look at this parameter, otherwise you may simply ruin the matrix backlight. If the power supply is different from 12 volts, then you cannot directly connect the backlight power connector; you will need to provide the required supply voltage.

And so, we set up the scaler in accordance with the data from the datasheet. I am interested in the resolution of 1280×800 and 6-bit, for this I set jumpers F and G

The jumpers have been configured, now let's go through the elements on the board.

1 - the first two connectors are power

2 – serial port

3 – DC-DC converter

4 – linear stabilizer

5 – connectors (VGA, HDMI, RCA, audio and high-frequency antenna connection)

6 – backlight control

7 – buttons and all controls

8 – LVDS connector where the matrix is ​​connected

9 - memory

10 – processor

11 – power amplifier

12 – TV tuner

More about connectors

Backlight control connector.

If you have LED matrix, that is, LED, then you don’t need to bother, it’s right in your matrix backlight control controller installed and this connector goes directly into the cable. Those. Just connect the matrix and you don’t need to worry about anything else.

If the matrix is ​​ancient, this can be determined by the additional wires coming out of the matrix.

Such lamps can be installed in the matrix and wires come out of it. In laptops there is usually 1 wire, in a monitor matrix there are 2 or 4. To connect such a matrix you can use universal inverter for lighting. It comes in 1, 2 and 4 outputs, i.e. each output is the connection of one lamp. The inverter must be selected according to the number of lamps in your matrix, that is, you cannot connect only 2 lamps to an inverter with 4 outputs, since the inverter will go into protection, because all outputs must be evenly loaded. Therefore, if the matrix is ​​for 2 lamps, we buy an inverter for 2 outputs, if for 1 lamp, we buy for 1 output. The connectors are unified so they fit 1 in 1, they just plug in like that and that’s it.

Let's start connecting

For this we need a cable, it is easy to plug in, the jumpers on the board are already configured. LVDS aligned to the first leg, on the cable this is a marking in the form of a spot of paint, and on the board the triangle is the first leg.

Just in case, we check whether the backlight is suitable. Red is plus, black is minus and the only wire is to turn on the backlight. We turn the board over to reverse side and compare the inscriptions near the contacts with the wires, if everything matches, we connect.

We also need some kind of management. By the way, more details about the control, the block where I connected the IR receiver is the control. Here are the buttons, they are all labeled, the buttons can be purchased separately or you can connect your own.

In principle, that's all, everything that needs to be connected.

Turn the matrix over and connect the power. If you are going to connect to a computer, then you can take power from the computer's power supply. Let's turn on...

Now you need to deal with the remote control to find the menu and change the language. I think this process is not worth describing, since everything may be different for your scaler. Unfortunately, I only found English in my country, but it doesn’t matter, I’ll use it. And on the same settings tab, I found the menu size and increased it so that everything was better visible.

Well, let's try connecting the camera via HDMI. In general, when I connected the camera, it turned out that the halftones of the colors were displayed incorrectly.

At first I thought that the reference voltage buffer in the matrix had burned out, but after connecting the matrix to the tablet I realized that everything was fine with the matrix, it had not burned out. Having rummaged around the Internet, I found service menu. It turns out that you need to change the way the scaler works with the matrix in the service menu. To do this, go to the menu and dial code 8896, and the service menu will open to us. In the menu we find system settings(System setting) -> Panel settings (Panel setting) -> and simply change color scheme(Color set). Going through all the options, we find the most optimal one, for me it was 3. Other scaler models may have a different access code to the service menu and a slightly different path to the color scheme settings.

We exit the menu and see that all colors are displayed correctly.

In the same way, you can connect the matrix from almost any tablet or monitor.