KR200304194Y1 - LCD module connected to video card having PCB function - Google Patents

Abstract

The present invention relates to an LCD module connected to a video card with a built-in function in the PCB, the LCD module connected to the video card with a PCB function according to the present invention, the PCB function according to the present invention for achieving the above object is An LCD module connected to an additional video card includes a video card having a video memory and a video chip, and an LCD module connected to the video card and having a PCB function. The video card includes a scalar and a time controller. It is configured to implement PCB function by providing chip, DC / DC block, gamma block, and serial interface Tx to LCD module, so that all the block functions mounted on PCB of LCD module can be provided from video card. It is possible without the PCB.

Description

LCD module connected to video card having PCB function}

The present invention relates to an LCD module connected to a video card, and more particularly, to an LCD module connected to a video card with a PCB function, which is connected to a video card with a printed circuit board (PCB) function and does not require a PCB function. It is about.

In general, a video card converts a digitally processed signal into an analog signal and transmits the signal to a monitor. The LCD module converts the analog signal back into a digital signal and supplies it to a time controller (ie, a T / CON timing controller). Analog vs. Digital, and Digital and Analog, bring about as much loss in the signal.

In this regard, the PC block diagram according to the related art will be described with reference to a lap-top PC of FIG. 1A and a desktop PC block diagram of FIG. 1B.

FIG. 1A is an example of a Lap-top PC in a PC block diagram according to the prior art, and FIG. 1B is a schematic diagram of a desktop PC block diagram.

As shown in FIG. 1A, a typical laptop PC (lap-top PC) transmits a data signal to the LCD module 20 in a low voltage differential signal (LVDS) manner from a video card 10.

The LVDS 15 transmitted from the video card 10 is converted into an RGB data signal and a transistor-transistor logic (TTL) to provide a signal required for the source / gate driver. Recently, LVDS Rx is embedded in the time controller. Here, RVDS Rx means a device that receives the LVDS signal, Rx means receive (receive).

In addition, as shown in the example of the existing desktop PC of the conventional PC block diagram, as shown in FIG. 1B, in a typical desktop PC, the video card 40 is analog-to-analog for compatibility with a cathode ray tube (CRT) monitor. The data signal is transmitted to the LCD module 50.

The AD board 55 of the LCD module 50 receives this analog data signal, converts it back into digital data, and inputs it to a scaler chip 57. The scalar chip 57 converts digital data to a full screen on the user's screen even if the resolution is changed.

The modified digital data output from the scalar chip 57 is converted into the LVDS method and supplied to the timing controller 59 of the LCD module 50. Recently, a scalar chip and a timing controller have been used as one chip.

In the case of a lap-top PC, an LVDS signal is sent from a video card, and the LCD module converts the LVDS signal back into a TTL signal and processes it.

In addition, a DC / DC block, a gamma block, a Vcom block, and a time controller block to be supplied to the driver IC are required. In the case of desktop-top PCs, an additional A / D board is added to the lap-top PC. Here, the LCD module has a predetermined resolution that can be displayed, and the resolution output by the video card is various (for example, VGA, SVGA, XGA, SXGA, ...). If the resolution of the LCD module is XGA, the A / D board is responsible for creating data for the LCD module to display the resolution from VGA to XGA.

In the prior art, a video card converts a digitally processed video signal to analog for transmission to a monitor. At this time, 100% conversion of the digital signal to analog is impossible. In desktop-top LCD modules, the analog video signal is converted back to digital, which is also 100% impossible. That is, loss of the video signal may occur at the time of switching.

The simplest way to minimize the loss of video signal is to transmit a digital signal that is strong against noise.

However, the digital signal must be converted back from the LCD module to a signal suitable for the source driver IC.

The present invention has been made to solve the above problems of the prior art, the block function to be mounted on the PCB of the LCD module is provided by the video card all the video function is added to the PCB without the PCB in the LCD module The purpose is to provide an LCD module connected to the card.

1A is an example of a Lap-top PC in the PC block diagram according to the prior art, and FIG. 1B is a schematic diagram of a desktop PC block diagram.

Figure 2 is a schematic diagram of a PC block diagram showing an LCD module connected to a video card with a PCB function according to the present invention.

[Description of Drawing Reference]

70: video card 71: video memory

73: video chip + scale + T / CON (timing controller) 75: serial interface

77: DC / DC block 80: LCD module

81: gate signal pattern 83: gate COG (chip on glass)

85: source COG (chip on lass) 87: source signal / data pattern

91: panel

In the LCD module connected to the video card with a PCB function according to the present invention for achieving the above object, In the video card with a built-in video memory and a video chip and an LCD module connected to the video card and having a PCB function, The video card includes a video chip having a scalar and a time controller, a DC / DC block, a gamma block, and a serial interface Tx for supplying an LCD module to implement a PCB function.

(Example)

Hereinafter, an LCD module connected to a video card having a PCB function according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a schematic diagram of a PC block diagram showing an LCD module connected to a video card with a PCB function according to the present invention.

The LCD module connected to the video card with the PCB function according to the present invention, as shown in Figure 2, by providing all the functions of the block mounted on the PCB on the PCB of the LCD module 8 in the video card 70 In the LCD module 80, PCBless becomes possible. Here, the implementation of a block in the PCB function on the video card does not mean that the same circuit is implemented on the video card, but the simplified implementation of the same function on the video card. For example, gamma blocks require more than 10 different voltages.

In addition, the image data signal is supplied to a serial interface 75 such as small LVDS or reduced swing data signaling (RSDS) (that is, two data are output to one data line as a serial interface). It can also reduce. In this case, when data is transmitted through the serial interface method, the number of data lines is reduced, thereby reducing the total number of lines from the video card to the LCD module. In addition, the reason for reducing the number of lines is to use a chip on glass (COG). This is because the number of data lines or voltages is limited when used. In order to reduce the number of chips, a time chip of an LCD module and a scalar of an A / D board may be integrated into a single chip on a video chip of a video card.

On the other hand, the video card 70 is a video chip (73) with a built-in scalar and time controller, a DC / DC block (77) to supply the LCD module (that is, a block for generating a voltage required for the LCD module), Gamma block, serial interface (Tx 75) (where Tx means transmission).

As described above, according to the LCD module connected to the video card with the PCB function according to the present invention, the timing controller block, DC / DC block, gamma block (that is located in the LCD module) Ultra-thin and ultra-thin LCD module by moving the Vcom block (ie, the block that generates the voltage required for the LCD panel) to the video card of the PC This is possible.

In addition, since all functions are provided by the video card, the LCD module consists of only a panel, driver IC, and backlight, enabling ultra-lightweight and ultra-thin LCD modules, thereby increasing yield.

On the other hand, the present invention is not limited to the above-described specific preferred embodiment, any person having ordinary knowledge in the field to which the present invention belongs without departing from the gist of the present invention claimed in the claims can be variously modified. will be.

Claims (3)

In a video card with a built-in video memory and a video chip and an LCD module connected to the video card and having a PCB function, The video card has a video chip with a built-in scalar and time controller, and a DC / DC block, a gamma block, and a serial interface Tx for supplying an LCD module to implement a PCB function. LCD module connected to the card. delete 2. The LCD module of claim 1, wherein the serial interface Tx is a small low voltage differential signal (LVDS) or reduced swing data signaling (RSDS).