KR100717180B1 - Liquid crystal display - Google Patents

Abstract

The present invention discloses a liquid crystal display device that is light and simple and is driven by low power. The disclosed invention includes a data pad printed circuit unit (Y-PCB) and a gate pad printed circuit unit (X-PCB) disposed on one side of a panel edge; A digital receiver unit for receiving an external clock and control signal at the center of the panel, an A / D converter unit for converting red, green, and blue graphic signals into a digital signal, a scale controller unit for generating a scale signal, and a direct current Module circuit unit including a DC / DC converter for converting the size of the power supply, a timing controller for distributing the data signal and the driving signal, a gradation driving circuit for adjusting the graphic voltage, a backlight inverter unit and a micro processor for controlling it The module circuit part may have a 'ㅗ' type or 'ㅁ' type structure, each of which is electrically connected to the data pad printed circuit part and the gate pad printed circuit part by a flexible printed circuit (FPC).

Description

Liquid Crystal Display {LIQUID CRYSTAL DISPLAY}

1 is a panel block diagram of a liquid crystal display according to the prior art.

2 is a panel block diagram of a liquid crystal display according to the present invention;

3A and 3B illustrate another embodiment of the present invention.

    * Description of the symbols for the main parts of the drawings *

10: Data pad printed circuit section (Y-PCB) 11: Gate pad printed circuit section (X-PCB)

30: module circuit part 31: DC / DC converter part

32: timing controller portion 33: gradation drive circuit portion

34: micro processor section 35: scale controller section

35a, 35b: FPC 36: digital receiver section

37: A / D converter section 100: panel

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly, a liquid crystal that can be driven with low light weight and low power, and can prevent signal distortion caused by electric magnetic interference (EMI) and noise. It relates to a display device.                         

In general, a liquid crystal display converts a graphic signal from an A / D converter unit into a digital signal in a computer main body and then applies it to a module circuit unit in the liquid crystal display panel, where the applied digital signal is suitable for displaying liquid crystal. After converting to a signal, a data pad printed circuit board (Y-PCB) connected to the data pad unit and a gate pad printed circuit board (X-PCB) connected to the gate pad unit The signal is applied to the substrate through the unit and displayed.

FIG. 1 illustrates a panel block diagram of a liquid crystal display according to the related art, and includes a data pad printed circuit unit 10 (Y-PCB) and a gate pad printed circuit unit on one side of an edge of the panel 100 of the liquid crystal display. 11) (X-PCB) is arranged, and a module circuit portion 20 is arranged in the center of the panel 100. The module circuit unit 20 includes a DC / DC converter unit 21, a timing controller unit 22, and a gray scale driving circuit unit 23. In addition, the module circuit portion 20 having such a structure is electrically connected to the gate pad printed circuit portion 11 and the data pad printed circuit portion 10 by FPCs 15a and 15b (Flexible Printed Circuit), respectively.

A liquid crystal display device having such a structure applies a signal through a cable from a computer that generates an external red, green, and blue graphic signal, a video signal, a power supply, a clock signal, and an image control signal. After receiving the signal and converting the signal into an appropriate signal for display, the gate pad, the data pad, and the common electrode (Vcom) are applied to the pad part, and the liquid crystal is driven and displayed.

However, when the graphic signal generated from the computer is applied to the liquid crystal display device through the cable by the high frequency main clock signal as described above, the signal reduction and noise caused by the cable are not only generated, but the timing controller affects the display. There is a problem of degrading the screen quality.

Accordingly, the present invention has been made to solve the above problems, by forming an A / D converter board in the module circuit portion of the liquid crystal display device, the electromagnetic interference (EMI) and noise ( SUMMARY OF THE INVENTION An object of the present invention is to provide a liquid crystal display device having improved noise) and data transfer limitations.

To achieve the above object, the present invention provides a data pad printed circuit unit (Y-PCB) and a gate pad printed circuit unit (X-PCB) disposed on one side of a panel edge; A digital receiver unit for receiving an external clock and control signal at the center of the panel, an A / D converter unit for converting red, green, and blue graphic signals into a digital signal, a scale controller unit for generating a scale signal, and a direct current Module circuit unit including a DC / DC converter for converting the size of the power supply, a timing controller for distributing the data signal and the driving signal, a gradation driving circuit for adjusting the graphic voltage, a backlight inverter unit and a micro processor for controlling it The module circuit part may have a 'ㅗ' type or 'ㅁ' type structure, each of which is electrically connected to the data pad printed circuit part and the gate pad printed circuit part by a flexible printed circuit (FPC).                     

The present invention also provides a data pad printed circuit unit (Y-PCB) and a gate pad printed circuit unit (X-PCB) disposed on one side of a panel edge; A digital receiver unit for receiving an external clock and control signal at the center of the panel, an A / D converter unit for converting red, green, and blue graphic signals into a digital signal, a scale controller unit for generating a scale signal, and a direct current Module circuit unit including a DC / DC converter for converting the size of the power supply, a timing controller for distributing the data signal and the driving signal, a gradation driving circuit for adjusting the graphic voltage, a backlight inverter unit and a micro processor for controlling it The module circuit unit includes a first block including a digital receiver unit and an A / D converter unit, a second processor including a micro processor unit, a scale controller unit, a DC / DC controller unit, and a backlight inverter unit, a timing controller unit, and a gray scale unit. It is divided into a third block including a driving circuit unit and characterized in that to ground each .

Here, the third block is in direct contact with the gate pad printed circuit unit, and the data pad printed circuit unit is contacted with a flexible printed circuit (FPC).

According to the present invention, the digital receiver unit, the A / D converter unit, the DC / DC converter unit, and the backlight inverter unit can be mounted on the module printed circuit board of the liquid crystal display device, thereby realizing a thin and light liquid crystal display device. have.

(Example)

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.                     

FIG. 2 is a block diagram illustrating a panel of a liquid crystal display according to an exemplary embodiment of the present invention. As shown in FIG. 2, a data pad printed circuit unit 10 (Y-PCB) is formed on one side of an edge of the panel 100 of the liquid crystal display. A gate pad printed circuit portion 11 (X-PCB) is disposed, and a module circuit portion 30 is disposed in the center of the panel 100. The module circuit unit 30 includes a digital receiver unit 36 for receiving external clock and control signals, an A / D converter unit 37 for converting red, green, and blue graphic signals into digital signals, and a scale signal. The scale controller unit 35 to be generated, the DC / DC converter unit 31 for converting the magnitude of the DC power supply, the timing controller unit 32 for distributing the data signal and the drive signal, and the gradation driving for adjusting the graphic voltage It is composed of a circuit portion 33, the backlight inverter portion 38 and a micro processor 34 for controlling it.

In addition, the block in which the timing controller 32 and the gradation driving circuit 33 of the module circuit 30 having such a structure are disposed is electrically connected by the gate pad printed circuit 11 and the FPC 35b. The module circuit part has an FPC 'ㅗ' type structure with the data pad printed circuit part.

Unlike the panel of the conventional liquid crystal display device, the panel of the liquid crystal display device having such a structure does not apply a graphic signal converted into a digital signal to the panel of the liquid crystal display device by a cable, but rather a module circuit part in the panel of the liquid crystal display device. Since the analog graphics signal is converted into a digital graphics signal, the signal quality of the liquid crystal display device can be improved without being subjected to signal distortion, noise, and electronic interference by the cable.

3A and 3B illustrate another embodiment of the present invention. As shown in FIG. 3A, the module circuit portion 40 of the panel has the same structure as described with reference to FIG. 2, but the gate pad printed circuit portion 11 and the data pad printing are respectively formed. The circuit portion 10 is electrically connected by FPC (Flexible Printed Circuit) 45a, 45b.

3B is a 'b' shaped module circuit unit 50 as shown in FIG. 2, and has the same configuration, but has one digital receiver unit 56 and one A / D converter unit 57 of the module circuit unit 50. The first block 60, the microprocessor 54, the scale controller unit 55, the DC / DC converter unit 51 and the backlight inverter unit 58 as the second block 66, and the timing Each block is grounded using a third block 62 including the controller 52 and the gray scale driving circuit 53 to minimize electronic disturbances.

In addition, the third block 62 is electrically connected to the data pad printed circuit unit 10 and the flexible printed circuit (FPC) 55a, and is directly connected to the gate pad printed circuit unit 11. .

Accordingly, the present invention forms a multi scan circuit, an A / D converter board, a clock, and a controller in a panel of a liquid crystal display device, which exist in a conventional computer main body, thereby preventing signal distortion, noise, and electronic disturbance caused by signal transmission. Improved dignity.

As described above, according to the present invention, the multi-scan, A / D boards, etc., which existed separately in the computer main body and the liquid crystal display device, are formed in the module circuit of the liquid crystal display device to prevent distortion and noise of the digital graphic signal. It works.                     

In addition, since it is integrated in the module circuit portion, the source driver IC and the gate driver IC are simplified, and thus, the liquid crystal display device having a light and small size can be realized.

In addition, by dividing the module circuit into blocks, each block is grounded, thereby minimizing an electronic obstacle.

The present invention is not limited to the above-described embodiments, and various changes can be made by those skilled in the art without departing from the gist of the present invention as claimed in the following claims.

Claims (3)

A data pad printed circuit unit (Y-PCB) and a gate pad printed circuit unit (X-PCB) disposed on one side of a panel edge; A digital receiver unit for receiving an external clock and control signal at the center of the panel, an A / D converter unit for converting red, green, and blue graphic signals into a digital signal, a scale controller unit for generating a scale signal, and a direct current Module circuit unit including a DC / DC converter for converting the size of the power supply, a timing controller for distributing the data signal and the driving signal, a gradation driving circuit for adjusting the graphic voltage, a backlight inverter unit and a micro processor for controlling it Include, And wherein the module circuit portion has a 'ㅗ' type or 'ㅁ' type structure, each of which is electrically connected to the data pad printed circuit portion and the gate pad printed circuit portion by a flexible printed circuit (FPC). A data pad printed circuit unit (Y-PCB) and a gate pad printed circuit unit (X-PCB) disposed on one side of a panel edge; A digital receiver unit for receiving an external clock and control signal at the center of the panel, an A / D converter unit for converting red, green, and blue graphic signals into a digital signal, a scale controller unit for generating a scale signal, and a direct current Module circuit unit including a DC / DC converter for converting the size of the power supply, a timing controller for distributing the data signal and the driving signal, a gradation driving circuit for adjusting the graphic voltage, a backlight inverter unit, and a micro processor for controlling the same. Including; The module circuit unit includes a first block including a digital receiver unit and an A / D converter unit, a second processor including a micro processor unit, a scale controller unit, a DC / DC controller unit, and a backlight inverter unit, a timing controller unit, and a gray scale driving circuit unit. A liquid crystal display, characterized in that the ground is divided into a third block to include. The method of claim 2, And the third block is in direct contact with the gate pad printed circuit unit and in contact with the data pad printed circuit unit by a flexible printed circuit (FPC).

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