KR20060083711A - Liquid crystal display panel assembly and method for visual inspection the same - Google Patents

Abstract

Provided are a liquid crystal display substrate assembly and a visual inspection method thereof capable of detecting defects in all or a portion of a liquid crystal display device. The liquid crystal display substrate assembly includes a plurality of gate lines, a plurality of data lines intersecting the plurality of gate lines, a plurality of thin film transistors connected to one of the gate lines and one of the data lines, and a pixel electrode connected to the thin film transistors. And a liquid crystal display substrate partitioned into two or more different display zones and two or more different shorting bar sets formed to selectively visually inspect each display zone of the liquid crystal display substrate.

Liquid Crystal Display Board Assembly, Shorting Bar, Visual Inspection

Description

Liquid crystal display panel assembly and method for visual inspection the same}

1 is a conceptual diagram of a liquid crystal display according to an exemplary embodiment of the present invention.

2 is an equivalent circuit diagram of one pixel of a liquid crystal display according to an exemplary embodiment of the present invention.

3 is a plan view of a liquid crystal display according to an exemplary embodiment divided into display zones.

4 is a table showing a consumer specification for the liquid crystal display.

5 is a schematic view of a liquid crystal display substrate assembly according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

300: liquid crystal display substrate assembly 310: gate wiring

320: data wiring 330: thin film transistor

340a-340d, 350a-350d: Shorting Bar 360a-360d, 370a-370d: Pad

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display substrate assembly and a visual inspection method thereof, and more particularly, to a liquid crystal display substrate assembly and a visual inspection method thereof capable of detecting defects in all or part of a region of a liquid crystal display device.

A typical liquid crystal display (LCD) includes two display substrates and a liquid crystal layer having dielectric anisotropy interposed therebetween. The desired image is obtained by applying an electric field to the liquid crystal layer and adjusting the intensity of the electric field to adjust the transmittance of light passing through the liquid crystal layer. Such a liquid crystal display is representative among flat panel displays (FPDs) that are easy to carry, and among them, TFT-LCD using a thin film transistor (TFT) as a switching element is mainly used.

A plurality of gate lines and data lines are formed in the row and column directions on the display substrate on which the thin film transistors are formed, and pixel electrodes connected to the gate lines and the data lines are formed through the thin film transistors. The thin film transistor controls the data signal transmitted through the data line according to the gate signal transmitted through the gate line and transmits the data signal to the pixel electrode. The gate signal is generated by combining a plurality of gate driving ICs, which are supplied with the gate on voltage and the gate off voltage generated by the driving voltage generator, under control of the signal controller. The data signal is obtained by converting the RGB digital signal transmitted from the signal controller into a gradation voltage in which a plurality of data driving ICs are analog voltages.

After attaching the driving IC as described above on the liquid crystal display substrate, the data lines and the gate lines may be electrically connected to the shorting bar in order to inspect the defect of the liquid crystal display substrate (hereinafter referred to as visual inspection). do. The end of the shorting bar includes a pad to which a signal for activating the shorting bar is applied. After the visual inspection is performed through the shorting bar, the shorting bar can be removed using a laser or the like.

When the shorting bar is activated, all the pixels are turned on at the same time. The signal is not transmitted to the defective pixel in the data line, the gate line, or the thin film transistor, and thus the brightness difference occurs in the pixel.

With respect to such visual inspection, some consumers are interested only in defects in specific display zones of the liquid crystal display. In other words, the liquid crystal display is divided into display zones so as to be a problem only for defects occurring in a specific display zone. In order to meet the demands of such consumers, conventionally, a separate jig is manufactured or a visual inspection for a specific display zone is performed depending on an inspector.

SUMMARY OF THE INVENTION The present invention has been made in an effort to provide a liquid crystal display substrate assembly capable of visually inspecting an entire area or a specific region of a liquid crystal display device.

Another object of the present invention is to provide a method for visually inspecting an entire area or a specific area of the liquid crystal display substrate assembly.                         

Another object of the present invention is to provide a liquid crystal display device including a liquid crystal display substrate assembly inspected by the visual inspection method.

Technical problems to be achieved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description.

According to an exemplary embodiment of the present invention, a liquid crystal display substrate assembly includes a plurality of gate lines, a plurality of data lines crossing the plurality of gate lines, and one of the gate lines and one of the data lines. A liquid crystal display substrate comprising a plurality of thin film transistors connected to each other and a pixel electrode connected to the thin film transistors and partitioned into two or more different display zones, and visual inspection is selectively performed for each display zone of the liquid crystal display substrate. And at least two different shorting bar sets formed to

According to another aspect of the present invention, there is provided a method for visual inspection of a liquid crystal display substrate assembly, the plurality of gate lines, a plurality of data lines crossing the plurality of gate lines, the gate line and the data. Optionally for each display zone of the liquid crystal display substrate in a liquid crystal display substrate comprising a plurality of thin film transistors connected to one of the lines and a pixel electrode connected to the thin film transistors and partitioned into two or more different display zones. And activating at least one shorting bar set of two or more different shorting bar sets formed to enable visual inspection.

According to another aspect of the present invention, a liquid crystal display device includes a plurality of gate lines, a plurality of data lines crossing the plurality of gate lines, one of the gate lines, and one of the data lines. In the liquid crystal display substrate including a plurality of thin film transistors connected to each other and a pixel electrode connected to the thin film transistors and partitioned into two or more different display zones, visual inspection may be selectively performed for each display zone of the liquid crystal display substrate. And a liquid crystal display substrate assembly inspected by a visual inspection method of activating at least one shorting bar set of two or more different shorting bar sets formed to

Specific details of other embodiments are included in the detailed description and drawings.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms, and only the present embodiments are intended to complete the disclosure of the present invention, and the general knowledge in the art to which the present invention pertains. It is provided to fully convey the scope of the invention to those skilled in the art, and the present invention is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 5.                     

1 is a conceptual diagram of a liquid crystal display according to an exemplary embodiment of the present invention, and FIG. 2 is an equivalent circuit diagram of one pixel of the liquid crystal display according to an exemplary embodiment of the present invention.

As shown in FIG. 1, a typical liquid crystal display device is connected to a liquid crystal display substrate assembly 300 and a gate driver 400, a data driver 500, and a gate driver 400 connected thereto. A driving voltage generator 700, a gray voltage generator 800 connected to the data driver 500, and a signal controller 600 for controlling them are included.

The liquid crystal display substrate assembly 300 includes a plurality of pixels in an area defined by a plurality of gate lines and data lines G1 -Gn and D1 -Dm in an equivalent circuit, and each pixel includes a gate. A thin film transistor Q connected to the lines and data lines G1 -Gn and D1 -Dm, a liquid crystal capacitor Cp, and a storage capacitor Cst connected thereto are included.

The gate line and the data lines G1 -Gn and D1 -Dm transfer gate signals and transfer a plurality of gate lines G1 -Gn and data signals extending in a row direction and in a column direction. It includes a data line (D1-Dm) extending to.

The thin film transistor Q is a three-terminal element, the control terminal of which is connected to the gate lines G1-Gn, the input terminal of which is connected to the data lines D1-Dm, and the output terminal of the thin film transistor Qp and the storage. It is connected to one terminal of the capacitor Cst.

Alternatively, the other terminal of the storage capacitor Cst may be connected to a gate line directly above (hereinafter, referred to as a previous gate line). The former is called a separate wire type and the latter is called a prior gate type.

Meanwhile, the liquid crystal display substrate assembly 300 may be schematically illustrated as shown in FIG. 2. For convenience, only one pixel is shown in FIG. 2.

As shown in FIG. 2, the liquid crystal display substrate assembly 300 includes a lower substrate 100 and an upper substrate 200 facing each other and a liquid crystal layer 3 therebetween. The lower substrate 100 includes gate lines Gi-1 and Gi, a data line Dj, a thin film transistor Q, and a storage capacitor Cst. The liquid crystal capacitor Cp has a pixel electrode 190 of the lower substrate 100 and a reference electrode 270 of the upper substrate 200 as two terminals, and the liquid crystal layer 3 between the two electrodes 190 and 270 is a dielectric material. Function as.

The pixel electrode 190 is connected to the thin film transistor Q, and the reference electrode 270 is formed on the entire surface of the upper substrate 200 and is connected to the common voltage Vcom.

Herein, the liquid crystal molecules change their arrangement according to the change of the electric field generated by the pixel electrode 190 and the reference electrode 270, and thus the polarization of light passing through the liquid crystal layer 3 changes. This change in polarization is represented by a change in transmittance of light by a polarizer (not shown) attached to the upper and lower substrates 100 and 200.

In the pixel electrode 190, a separate wiring to which a reference voltage is applied is provided on the lower substrate 100 to overlap the pixel electrode 190 to form a storage capacitor Cst. In the case of the shear gate method, the pixel electrode 190 overlaps the shear gate line Gi-1 through an insulator to form two terminals of the storage capacitor Cst together with the shear gate line Gi-1.

Unlike in FIG. 2, the reference electrode 270 may be provided in the lower substrate 100. In this case, both electrodes 190 and 270 may be linearly formed.

On the other hand, in order to implement color display, each pixel should be able to display a color, which is provided by a color filter 230 of red, green, or blue in a region corresponding to the pixel electrode 190. It is possible. The color filter 230 is mainly formed in the corresponding region of the upper substrate 200 as shown in FIG. 2, but may be formed above or below the pixel electrode 190 of the lower substrate 100.

Referring back to FIG. 1, the driving voltage generator 700 generates a gate on voltage Von for turning on the thin film transistor Q, a gate off voltage Voff for turning off the thin film transistor Q, and the like.

The gray voltage generator 800 generates a plurality of gray voltages related to the luminance of the liquid crystal display.

The gate driver 400 may also be referred to as a scan driver. The gate driver 400 may be connected to the gate lines G1 -Gn of the liquid crystal display substrate assembly 300 to control the gate-on voltage Von and the gate from the driving voltage generator 700. A gate signal composed of a combination of off voltages Voff is applied to the gate lines G1 -Gn.

The data driver 500 may also be referred to as a source driver. The data driver 500 is connected to the data lines D1 -Dm of the liquid crystal display substrate assembly 300 to select a gray voltage from the gray voltage generator 800 to select a data signal. Is applied to the data lines D1-Dm.

The signal controller 600 generates control signals for controlling operations of the gate driver 400, the data driver 500, the driving voltage generator 700, and the like, and outputs corresponding control signals to the gate driver 400 and the data. The driving unit 500 and the driving voltage generator 700 are supplied.

The liquid crystal display as described above generally inspects defects such as line defects and point defects of the lower substrate 100 before bonding the lower substrate 100 and the upper substrate 200. Visual inspection is done for this purpose.

In such visual inspection, a specific specification is required by the consumer, and as shown in FIG. 3, the liquid crystal display is divided into display zones (zones A and B) and illustrated in FIG. 4. As one can expect a specification that significantly interprets only defects in a particular display zone. Therefore, there is a need for a liquid crystal display device capable of visually inspecting whether a defect has occurred in a display zone desired by a consumer (corresponding to zone A in FIG. 3).

Hereinafter, a liquid crystal display according to an exemplary embodiment of the present invention capable of visually inspecting whether a defect occurs in a display zone desired by a consumer will be described.

5 is a schematic view of a liquid crystal display substrate assembly according to an embodiment of the present invention.

Referring to FIG. 5, the horizontal gate line 310 and the vertical data line 320 cross each other in the liquid crystal display substrate assembly 300 of the liquid crystal display according to the exemplary embodiment. . The thin film transistor 330 is formed at the intersection of the gate line 310 and the data line 320, and a pixel electrode (not shown) connected to the thin film transistor 330 is the gate line 310 and the data line 320. It is formed in the pixel area defined by).

In the liquid crystal display substrate assembly 300 as described above, the liquid crystal display substrate assembly 300 is divided into two or more different display zones, and two or more of each other formed to selectively visually inspect each display zone. Other shorting bar sets.

The liquid crystal display according to the exemplary embodiment of the present invention includes a shorting bar 340a which electrically connects the gate line 310 and the data line 320 to one display zone A of two or more different display zones. 340b, 350a, 350b). In particular, the shorting bar set may include a shorting bar 340a for electrically connecting odd-numbered gate lines 310 and a shorting bar 340b for electrically connecting even-numbered gate lines 310. And a shorting bar 350a electrically connecting the odd-numbered data lines 320 among the plurality of data lines 320 and a shorting bar 350b electrically connecting the even-numbered data lines 320.

The shorting bars 340a and 340b electrically connected to the gate line 310 may be integrally formed with the gate line 310 by using the same material as the gate line 310 when the gate line 310 is formed, and may include a data line ( The shorting bars 350a and 350b electrically connected to the 320 may be formed of the same material as the data line 320 when the data line 320 is formed.

End portions of the shorting bars 340a, 340b, 350a, and 350b include pads 360a, 360b, 370a, and 370b to which electrical signals for activating the shorting bars 340a, 340b, 350a, and 350b are applied. .

In addition, a liquid crystal display according to an exemplary embodiment of the present invention shows a display in which a gate line 310 and a data line 320 are electrically connected to one display zone B of two or more different display zones. It may include a shorting bar set having the setting bars 340c, 340d, 350c, and 350d.

In particular, the shorting bar set may include a shorting bar 340c for electrically connecting odd-numbered gate lines 310 and a shorting bar 340d for electrically connecting even-numbered gate lines 310. And a shorting bar 350c for electrically connecting the odd-numbered data lines 320 among the plurality of data lines 320 and a shorting bar 350d for electrically connecting the even-numbered data lines 320, respectively. .

The shorting bars 340c and 340d electrically connected to the gate line 310 may be integrally formed with the gate line 310 by using the same material as the gate line 310 when the gate line 310 is formed, and may include a data line ( The shorting bars 350c and 350d electrically connected to the 320 may be formed of the same material as the data line 320 when the data line 320 is formed.

End portions of the shorting bars 340c, 340d, 350c, and 350d include pad portions 360c, 360d, 370c, and 370d to which electrical signals are applied to activate the shorting bars 340c, 340d, 350c, and 350d, respectively. .                     

A visual inspection method for some display zones of the liquid crystal display substrate assembly according to the exemplary embodiment shown in FIG. 5 is as follows.

First, the first high potential voltage is supplied to the shorting bars 340a and 340b electrically connecting the gate lines 310 of the display zone A to be visually inspected via the pads 360a and 360b. Two high potential voltages are applied to the shorting bars 350a and 350b that electrically connect the data lines 320 via the pads 370a and 379b to activate the respective shorting bars 340a, 340b, 350a and 350b.

More specifically, odd-numbered gate lines 310 of the plurality of gate lines 310 included in the display zone A to be visually inspected through the pads 360a and 360b by using a first high potential voltage of about 20V are provided. The shorting bar 340a electrically connected to the evening gate lines 310 of the plurality of gate lines 310 is supplied to the shorting bar 340b electrically connected to each other. In addition, the odd-numbered data lines 320 of the plurality of data lines 320 included in the display zone A to be visually inspected via the pads 370a and 370b may have a second high potential voltage of about 10V. Each shorting bar 340a, 340b, 350a, 350b is activated by applying the shorting bar 350a for connecting to the shorting bar 350b for electrically connecting even-numbered data lines 320 of the plurality of data lines 320. do.

In this case, pixels positioned at a point where the gate line 310 and the data line 320 intersect, that is, the thin film transistors 330 are driven. In addition, the voltage level or intensity of the electric field of each of the pixels, ie, the thin film transistors 330, is detected by a completed liquid crystal display substrate inspector (not shown), and the detected result is provided as a graphic image. . Through such a graphic image, it is possible to confirm whether or not a predecessor and a point defect occur.

Alternatively, the divisional inspection may be performed on defects on the display zone A to be visually inspected of the liquid crystal display substrate assembly 300.

In detail, the gate line 310 and the data line 320 included in the display zone A to be visually inspected of the liquid crystal display substrate assembly 300 may be divided between the gate line 310 and the data line 320. Defects such as a short circuit in the liver may be detected.

In practice, such a split visual inspection method may include an odd numbering bar 340a and an odd numbering bar 340a which electrically connect the odd-numbered gate lines 310 included in the display zone A to visually inspect the first and second high potential voltages. A shorting bar 350a that electrically connects the data lines 320, a shorting bar 340a that electrically connects the odd-numbered gate lines 310, and a shorting bar that electrically connects the even-numbered data lines 320. 350b, the shorting bar 340b electrically connecting the even-numbered gate line 310, the shorting bar 350a electrically connecting the odd-numbered data line 320, and the even-numbered gate line 310 are electrically connected to each other. This may be achieved by sequentially supplying the shorting bar 340b for connecting to the shorting bar 350b for electrically connecting the even-numbered data lines.

In addition, visual inspection methods for all display zones of the liquid crystal display substrate assembly 300 included in the liquid crystal display according to the exemplary embodiment of the present invention are as follows.                     

First, the first high potential voltage is applied to the shorting bars 340a, 340b, 340c, and 340d which electrically connect the gate lines 310 of the display zone to be visually inspected via the pads 360a, 360b, 360c, and 360d. In addition, the second high potential voltage is applied to the shorting bars 350a, 350b, 350c, and 350d electrically connecting the data lines 320 via the pads 370a, 370b, 370c, and 370d. Activate 340a, 340b, 340c, 340d, 350a, 350b, 350c, 350d.

More specifically, odd-numbered gate lines 310 of the plurality of gate lines 310 included in the display zone to visually inspect the first high potential voltage of about 20V via the pads 360a, 360b, 360c, and 360d. Supplying to the shorting bars 340b and 340d electrically connecting the shorting bars 340a and 340c to electrically connect the gate lines 310 and the even-numbered gate lines 310 of the plurality of gate lines 310 to each other. In addition, the odd-numbered data lines 320 of the plurality of data lines 320 included in the display zone to be visually inspected via the pads 370a, 370b, 370c, and 370d may have a second high potential voltage of about 10V. The shorting bars 350a and 350c electrically connected to the shorting bars 350b and 350d that electrically connect the even-numbered data lines 320 of the plurality of data lines 320 to each shorting bar 340a, 340b, and 340c. 340d, 350a, 350b, 350c, 350d).

In this case, pixels positioned at a point where the gate line 310 and the data line 320 intersect, that is, the thin film transistors 330 are driven. In addition, the voltage level or intensity of the electric field of each of the pixels, ie, the thin film transistors 330, is detected by a completed liquid crystal display substrate inspector (not shown), and the detected result is provided as a graphic image. . Through such a graphic image, it is possible to confirm whether or not a predecessor and a point defect occur.

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. I can understand that. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive.

When visual inspection is performed using the liquid crystal display substrate assembly according to the embodiment of the present invention as described above, it is possible to selectively perform visual inspection on a specific display zone or all display zones according to consumer specifications, thereby satisfying consumer demand. Can be.

Claims (7)

A plurality of gate lines, a plurality of data lines crossing the plurality of gate lines, a plurality of thin film transistors respectively connected to one of the gate lines and one of the data lines, and a pixel electrode connected to the thin film transistors; A liquid crystal display substrate partitioned into two or more different display zones; And And at least two different shorting bar sets configured to selectively visually inspect each of the display zones of the liquid crystal display substrate. The method of claim 1, The shorting bar set A first shorting bar electrically connected to the plurality of gate lines; And And a second shorting bar electrically connected to the plurality of data lines. The method of claim 1, The shorting bar set A third shorting bar electrically connected to an odd-numbered gate line of the plurality of gate lines; A fourth shorting bar electrically connected to an odd data line of the plurality of data lines; A fifth shorting bar electrically connected to an even-numbered gate line of the plurality of gate lines; And And a sixth shorting bar electrically connected to odd-numbered data lines of the plurality of data lines. A plurality of gate lines, a plurality of data lines crossing the plurality of gate lines, a plurality of thin film transistors respectively connected to one of the gate lines and one of the data lines, and a pixel electrode connected to the thin film transistors; A liquid crystal for activating at least one shorting bar set of at least two different shorting bar sets formed to selectively visually inspect each display zone of the liquid crystal display substrate in a liquid crystal display substrate partitioned into two or more different display zones. Visual inspection method of display substrate assembly. The method of claim 4, wherein The shorting bar set A first shorting bar electrically connected to the plurality of gate lines; And And a second shorting bar electrically connected to the plurality of data lines. The method of claim 4, wherein The shorting bar set A third shorting bar electrically connected to an odd-numbered gate line of the plurality of gate lines; A fourth shorting bar electrically connected to an odd data line of the plurality of data lines; A fifth shorting bar electrically connected to an even-numbered gate line of the plurality of gate lines; And And a sixth shorting bar electrically connected to an odd-numbered data line of the plurality of data lines. A plurality of gate lines, a plurality of data lines crossing the plurality of gate lines, a plurality of thin film transistors respectively connected to one of the gate lines and one of the data lines, and a pixel electrode connected to the thin film transistors; In a liquid crystal display substrate partitioned into two or more different display zones, a visual for activating at least one shorting bar set of two or more different shorting bar sets configured to selectively visually inspect each display zone of the liquid crystal display substrate. A liquid crystal display device comprising the liquid crystal display substrate assembly inspected by the inspection method.

Images