KR101254645B1 - Liquid Crystal Display Device - Google Patents

Abstract

The present invention relates to a liquid crystal display device in which the structure of the lighting inspection unit is optimized by varying the transistor arrangement of the lighting inspection unit, the first substrate and the second substrate facing each other; A pad part defined on one side of the first substrate; A plurality of data driver input terminals and a plurality of data driver output terminals formed at both ends of the pad unit in the vertical direction; A transistor unit connected to the data driver input terminal one-to-one and having transistors to which an R signal, a G signal, and a B signal are applied from the data driver input terminal are arranged in a horizontal line; And a plurality of transistor pads connected to the transistor.

Lighting inspection unit, small model

Description

Liquid crystal display device

1 is a plan view showing a general liquid crystal display device

2 is a plan view illustrating the pad unit of FIG. 1;

3 is a plan view showing a liquid crystal display of the present invention.

4 is a plan view illustrating the pad unit of FIG. 3.

5 is a schematic diagram illustrating a transistor unit of FIG. 4.

Description of the Related Art [0002]

100 liquid crystal display 111 first substrate

112: second substrate 130: driver IC

131: data driver IC input terminal

132: data driver IC output terminal 135: transistor pad

141: transistor portion 145: transistor

150: pad portion 170: display area

200: FPC

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device in which the structure of the lighting inspection unit is optimized by varying the transistor arrangement of the lighting inspection unit.

As the information society develops, the demand for display devices is increasing in various forms, and in recent years, liquid crystal display devices (LCDs), plasma display panels (PDPs), electro luminescent displays (ELD), and vacuum fluorescent (VFD) Various flat panel display devices such as displays have been studied, and some of them are already used as display devices in various devices.

Among them, LCD is the most widely used as a substitute for CRT (Cathode Ray Tube) as a mobile image display device because of its excellent image quality, light weight, thinness, and low power consumption. In addition, it is being developed in various ways such as a monitor of a television and a computer to receive and display a broadcast signal.

Such a liquid crystal display may be largely divided into a liquid crystal panel displaying an image and a driving unit for applying a driving signal to the liquid crystal panel, wherein the liquid crystal panel has a predetermined space and is bonded to the first and second glass substrates. And a liquid crystal layer injected between the first and second glass substrates.

The first glass substrate (TFT array substrate) may include a plurality of gate lines arranged in one direction at a predetermined interval, a plurality of data lines arranged at regular intervals in a direction perpendicular to the gate lines, A plurality of pixel electrodes formed in a matrix form in each pixel region defined by crossing a gate line and a data line, and a plurality of thin films which are switched by signals of the gate line to transfer the signal of the data line to each pixel electrode Transistors are formed.

Meanwhile, a process of forming the plurality of thin film transistor arrays is referred to as a thin film transistor array process.

The second glass substrate (color filter substrate) includes a black matrix layer for blocking light in portions other than the pixel region, an R, G and B color filter layer for expressing color colors, and a common electrode for implementing an image. Is formed.

The first and second glass substrates are bonded to each other by a seal material having a predetermined space by a spacer and having a liquid crystal injection hole, and liquid crystal is injected between the two substrates to define a liquid crystal panel.

The driving principle of the general liquid crystal display device uses the optical anisotropy and polarization property of the liquid crystal. Since the liquid crystal is thin and long in structure, the liquid crystal has directivity in the arrangement of molecules, and the direction of the arrangement of molecules can be controlled by artificially applying an electric field to the liquid crystal. Therefore, when the molecular arrangement direction of the liquid crystal is arbitrarily adjusted, the molecular arrangement of the liquid crystal is changed, and light is refracted in the molecular arrangement direction of the liquid crystal by optical anisotropy, thereby representing image information.

Such a liquid crystal display device is called a twisted nematic (TN) mode liquid crystal display device, and the TN mode liquid crystal display device has a disadvantage in that the viewing angle is narrow, and thus an in-plane (IPS: In-Plane) is used to overcome the disadvantage of the TN mode. Switching mode liquid crystal display device has been developed.

In the transverse electric field type (IPS) mode liquid crystal display, a pixel electrode and a common electrode are formed parallel to each other at a predetermined distance in a pixel area of the first substrate so that a transverse electric field (horizontal electric field) is generated between the pixel electrode and the common electrode. The liquid crystal layer is aligned by the lateral electric field.

On the other hand, a driving unit for applying a driving signal to the liquid crystal panel is formed of a drive IC (drive IC) in each of the pad portion of the gate line and the data line.

In this case, the gate drive IC sequentially supplies scan signals to a plurality of gate lines, so that pixels arranged in a matrix form are sequentially selected by one line parallel to the gate line, and the pixels of the selected one line are sequentially selected. Are supplied with a data signal from a data driver IC.

 Hereinafter, a liquid crystal display according to the related art will be described with reference to the accompanying drawings.

1 is a plan view illustrating a general liquid crystal display, and FIG. 2 is a plan view illustrating a pad part of FIG. 1.

As shown in FIGS. 1 and 2, the liquid crystal display device 10 of the general invention includes a first substrate 11 and a second substrate 12 opposed to each other, and a space between the first and second substrates 11 and 12. It includes a liquid crystal layer (not shown) formed in.

In addition, the second substrate 12 is formed in a shape where one side portion is relatively larger than that of the first substrate 11, and a portion of the second substrate 12 having a larger area is exposed to expose the pad portion ( 15, a driver IC 17 is formed in the pad part 15 to transmit a driving signal of a wiring formed on the second substrate 12. A flexible printed circuit (FPC) 30 is formed at an end of the pad part 15, and is connected to an external system (not shown) or the like to control the signal toward the driver IC 17 of the second substrate 12. To pass. In this case, the display region 20 is defined in a portion where the first and second substrates 11 and 12 overlap with each other by a predetermined width from the outside, and display is performed at this portion.

As shown in Fig. 2, in the pad portion (see 17 in Fig. 2) of the liquid crystal display device of the related art, a lighting inspection portion is defined for lighting inspection, and the lighting inspection portion is largely transverse with the input terminal 27a of the drive IC. The first to third transistors 31, 32, 33, the transistor pads 28, and the output terminal 27b of the driver IC may be defined in parallel to each other.

The output terminal 27b and the input terminal 27a of the drive IC are located at both ends of the lighting inspection unit, and the drive ICs are formed to correspond to each other from the outside, and the output terminal 27b and the input terminal 27a correspond to each other.

Here, the first to third transistor units 31, 32, and 33 each have a different line of transistors for converging the RGB signal applied from the input terminal 27a of the drive IC into an R signal, a G signal, and a B signal, respectively. Are formed in the first, second, and third transistor portions 31, 32, and 33, and are applied to the transistor pad side 28. As shown in FIG. The transistor pad 28 may be directly connected to the display area without the first to third transistor units 31, 32, and 33, and may include a common voltage pad Vcom.

The lighting inspection unit of the conventional liquid crystal display device includes transistor portions for transmitting R, G, and B signals to the convergence and transistor pad sides, for each color signal, and are formed of at least three or more lines. Accordingly, the lighting inspection unit has a vertical height of at least 1.5 mm or more, and in the miniaturized model, efforts have been made to reduce the gap thereof.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide a liquid crystal display device in which the structure of the lighting inspection unit is optimized by varying the transistor arrangement of the lighting inspection unit.

The liquid crystal display of the present invention for achieving the above object is opposed to each other, and formed on both ends of the first substrate and the second substrate, the pad portion defined on one side of the first substrate, the vertical direction of the pad portion And a transistor unit including a data driver input terminal and an output terminal, a transistor for converging the R, G, and B signals applied from the data input terminal in a horizontal line, and a plurality of transistor pad terminals connected to the transistor unit. It has that feature.

The transistor unit includes a plurality of transistors corresponding to the data driver input terminal on one line.

The plurality of transistors share a gate end.

The plurality of transistors are matched to transistors applying the same signal and connected to the corresponding transistor pads.

Hereinafter, the liquid crystal display of the present invention will be described in detail with reference to the accompanying drawings.

3 is a plan view illustrating a liquid crystal display of the present invention.

As shown in FIG. 3, the liquid crystal display device 100 of the present invention includes a liquid crystal formed between the first substrate 111 and the second substrate 112 facing each other, and the first and second substrates 111 and 112. It comprises a layer (not shown).

In addition, the second substrate 112 is formed in a shape where one side portion is relatively larger than that of the first substrate 111, and thus a portion of the second substrate 112 having a larger area is exposed to expose the pad portion ( The driver IC 130 is formed in the pad part 150 to transmit a driving signal of the wiring formed on the second substrate 112. A flexible printed circuit (FPC) 200 is formed at an end of the pad unit 150, and is connected to an external system (not shown) to control driver 130 of the second substrate 112 toward the driver IC 130. To pass. In this case, the display region 170 is defined in a portion where the first and second substrates 111 and 112 overlap each other, and the display region 170 is defined from the outside.

4 is a plan view illustrating the pad portion of FIG. 3, and FIG. 5 is a schematic diagram illustrating the transistor portion of FIG. 4.

As shown in FIG. 4, in the pad portion (see 150 of FIG. 3) of the liquid crystal display of the present invention, a lighting inspection unit is defined for lighting inspection, and the lighting inspection unit is largely provided with an input terminal 131 of the drive IC and a transistor unit. 141, the transistor pad 135, and the output terminal 132 of the driver IC.

In addition, the output terminal 132 and the input terminal 131 of the drive IC are located at both ends of the lighting inspection unit, and the drive IC is formed to correspond to the outside, and the output terminal 132 and the input terminal 131 correspond to each other.

Here, the transistor unit 141 converges an RGB signal applied from the input terminal 131 of the drive IC into an R signal, a G signal, and a B signal, respectively, and applies the RGB signal to the transistor pad side 135. The transistor unit 141 is formed on one line in one direction. In addition to the RGB signal, the transistor unit 141 may transfer a separate signal to the transistor pad 135 side, and the transistor pad 135 side directly connects to the display area without interposing the transistor unit 141. It may be provided with a common voltage pad (Vcom).

Here, in the transistor unit 141, a plurality of transistors 145 corresponding to the data driver input terminal are disposed on one line. The plurality of transistors share a gate end.

The plurality of transistors 145 are matched with the transistors 145 applying the same signal and connected to the corresponding transistor pad 135.

As illustrated in FIG. 5, each transistor 145 of the transistor unit 141 shares a gate terminal G, and a source terminal S of the transistor pad side of the data drive input terminal of the transistor terminal 141. ) Is connected.

In such a case, the pad portion of the lighting inspection unit of the liquid crystal display of the present invention forms the transistor portion transmitting the R, G, and B signals in one line, thereby reducing the pad width of the lighting inspection unit. Vertical length can be reduced.

For example, in this case, when the transistor unit 141 is used as one line, the vertical length of the lighting test unit may be approximately 0.8 mm, and thus the vertical length of the transistor unit 141 may be significantly reduced than that of the conventional 1.5 mm or more. Can be.

The liquid crystal display of the present invention seeks to cope with the driver IC reduction structure by reducing the size of the small model transistor type lighting test.

For example, in the case of a small model, the conventional small lighting test is a transistor type, and a transistor and a pad are formed so that the on-off lighting test can be performed in the space where the driver IC is attached. However, in recent years, the vertical size of the driver IC has been reduced due to panel simplification, making it difficult to form transistors and pads for the transistor type on-off lighting test in the driver IC space. Accordingly, the transistor structure is changed to a straight line and used as the single gate stage of each RGB gate stage, thereby optimizing the lighting inspection unit structure.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and it is common in the art that various substitutions, modifications, and changes can be made without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

The liquid crystal display of the present invention as described above has the following effects.

It is difficult to form transistors and pads necessary for transistor type on-off lighting test in the driver IC space by reducing the vertical size of the driver IC due to the recent panel simplification, but reducing the driver IC by reducing the lighting test part by changing the transistor structure to a straight line. It can correspond to.

Claims (4)

A first substrate and a second substrate facing each other; A pad part defined on one side of the first substrate; A plurality of data driver input terminals and a plurality of data driver output terminals formed at both ends of the pad unit in the vertical direction; A transistor unit connected to the data driver input terminal one-to-one and having transistors to which an R signal, a G signal, and a B signal are applied from the data driver input terminal are arranged in a horizontal line; And And a plurality of transistor pads connected to the transistor. delete The method of claim 1, And the plurality of transistors share a gate end. The method of claim 1, And a transistor to which the same signal is applied among the plurality of transistors is connected to the same transistor pad.

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