JP2008158305A - Display device and display device defect repair method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reliably repair a defect by suppressing the movement of bubbles when a laser beam is irradiated to a defective pixel generated in a manufacturing process.
An insulating substrate on which a display area is formed, a counter substrate disposed to face the insulating substrate, a spacer 6 that holds the insulating substrate and the counter substrate at a predetermined interval, A display comprising the display area, a pixel formed on the insulating substrate, a video signal line 2 connected to the pixel, and a scanning line 1 intersecting the video signal line via an insulating film In the apparatus, a plurality of spacers are provided on each of the video signal lines 2 corresponding to one pixel and on each of the video signal lines 2 corresponding to pixels adjacent to the one pixel in the wiring direction of the scanning lines.
[Selection] Figure 1

Description

  The present invention relates to a display device capable of repairing defective pixels due to foreign matters mixed in a liquid crystal layer in a display device using liquid crystal, for example, and a defect repair method thereof.

When a defective pixel is generated in a manufacturing process of a display device using liquid crystal, according to the conventional technique, when the generated defect is a white defect, the first laser beam is irradiated from the laser oscillator to the white defective pixel. Thus, bubbles are generated in the surrounding liquid crystal layer including white defective pixels. In this bubble generation state, the second laser beam is irradiated from the laser oscillator to the white defect pixel, and the constituent material of the white defect pixel is scattered in the bubble with the energy. Since the scattered matter adheres to and is deposited on the alignment film of the liquid crystal panel, the alignment property of the alignment film changes. Therefore, even if no pixel drive voltage is applied, the polarization can be changed by 90 °. It is possible to correct to a black spot pixel that is not usually noticeable (see, for example, Patent Document 1).

JP-A-9-90304 (FIG. 4)

  However, in the above-described defect correction method for a liquid crystal display device, it is difficult to surely correct a defective pixel because the movement of bubbles generated by laser light irradiation to other pixels cannot be suppressed. For pixels with a narrow gap, the bubbles often move to other pixels, such as adjacent pixels, and even if laser light irradiation is performed in this state, a transpiration piece such as a transparent conductive film (ITO) remains. Since the liquid crystal stays in the liquid crystal, it cannot be uniformly deposited on the alignment film surface. As a result, the alignment is not sufficiently disturbed in a place where there is little adhesion, resulting in insufficient suppression of light leakage. Had.

The present invention has been made in view of such problems, and an object thereof is to obtain a display device and a display device repair method capable of reliably repairing defective pixels generated in the manufacturing process.

The present invention includes an insulating substrate on which a display region is formed, a counter substrate disposed to face the insulating substrate, a spacer that holds the insulating substrate and the counter substrate at a predetermined interval, In a display device comprising a display area, a pixel formed on the insulating substrate, a video signal line connected to the pixel, and a scanning line intersecting the video signal line via an insulating film, A plurality of the spacers are provided on each of the video signal line corresponding to one pixel and on the video signal line corresponding to a pixel adjacent to the one pixel in the wiring direction of the scanning line.

  According to the present invention, it is possible to obtain a display device and a display device repair method capable of reliably repairing defective pixels generated in the manufacturing process.

Embodiment 1 FIG.
A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a plan view of substantially one pixel of the display device according to Embodiment 1 of the present invention, and FIG. 2 is a cross-sectional view taken along line AA in FIG.

1 and 2, an insulating substrate 7 on which a display area is formed and a counter substrate 8 are bonded with a liquid crystal layer 9 interposed therebetween, and a polarizing plate (not shown) is bonded to each outer surface side. It constitutes a liquid crystal panel. A plurality of pixels constituting a display area are formed on the insulating substrate 7, and the pixels are composed of the scanning lines 1, the video signal lines 2 intersecting the scanning lines 1 through an insulating film, and the video signal lines 2. It consists of a source electrode 3 to be connected and a drain electrode 5 to be connected to the pixel electrode 4. Note that color filters (coloring materials) 10, 11, and 12 made of R, G, and B are formed on the surface of the counter substrate 8 that faces the liquid crystal layer 9, and shields light between the color filters. A black matrix 13 is formed. In such a configuration, as shown in FIGS. 1 and 2, insulation is provided between the video signal line 2 corresponding to one pixel and the video signal line 2 corresponding to a pixel adjacent in the wiring direction of the scanning line 1. A spacer 6 having a columnar shape, for example, is formed to keep the conductive substrate 7 and the counter substrate 8 at a predetermined interval. A plurality of spacers 6 are formed on each video signal line 2, and may be formed on either the insulating substrate 7 or the counter substrate 8. In this specification, a pixel is not a combination of the color filters R, G, and B, but indicates one dot having a pixel electrode corresponding to each of the R, G, and B color filters. .

With the above configuration, when a defect occurs in a pixel, when the bubble 14 is generated by irradiating laser light from the insulating substrate 7 side, the bubble 14 is prevented from moving to a portion other than the defective pixel, It becomes possible to reliably repair defective pixels. The laser beam is preferably a YAG laser or an excimer laser, and the wavelength of the laser beam is preferably 0.1 to 1.06 μm. Moreover, it is preferable that the irradiation intensity | strength of a laser beam is the range of output density 1 * 10 < ² > -1 * 10 < ⁴ > J / m < ² >. As shown in the figure, in the direction in which the R, G, B color filters are arranged (the wiring direction of the scanning line 1), there may be a difference in height due to the color material of the color filter, and the bubbles move more. Although it becomes easy, the movement of bubbles in the scanning line direction can be suppressed by applying the configuration of the present embodiment. In addition, for the wiring direction of the video signal line 2, color filters of the same color are usually arranged (striped arrangement). In this case, a difference due to the height of the color material of the color filter hardly occurs. It is only necessary to suppress movement only in the wiring direction. FIG. 2 shows an example in which the color material 11 has the lowest height for each color material, and this embodiment is more effective in repairing other defective pixels of R and B. Is.

As described above, according to the present embodiment, defective pixels generated during the manufacturing process can be reliably repaired by suppressing the movement of bubbles generated in the defective pixels by laser light irradiation.

Embodiment 2. FIG.
A second embodiment of the present invention will be described with reference to FIG. FIG. 3 is a cross-sectional view of a portion corresponding to the AA portion of FIG. 1 for the display device according to the second embodiment of the present invention. 3, the same components as those in FIGS. 1 and 2 are denoted by the same reference numerals, and differences from the first embodiment will be described.

In the present embodiment, in the color material of each of the R, G, and B color filters, the protrusion 15 is formed on the side portion of the tip portion facing the insulating substrate. For the same reason as in the first embodiment, the protrusion 15 may be formed at least on the side in the wiring direction of the video signal line 2 at the side of the tip of the color material. It may be formed on the side in the wiring direction. The protrusion 15 can be formed by etching or polishing a part other than the side part forming the protrusion after the color filter is formed.

With the configuration as described above, it is possible to achieve the same effects as those of the first embodiment. Furthermore, in the present embodiment, since the movement of bubbles is suppressed by the color filter itself, there is an advantage that the degree of freedom in selecting a spacer is increased.

Embodiment 3 FIG.
A third embodiment of the present invention will be described with reference to FIG. FIG. 4 is a cross-sectional view of a portion corresponding to the AA portion of FIG. 1 for the display device according to the third embodiment of the present invention. 4, the same components as those in FIGS. 1 to 3 are denoted by the same reference numerals, and differences from the first and second embodiments will be described.

  In the present embodiment, the central portion of the color material corresponding to the pixel is removed by irradiating the pixel where the defect has occurred with laser light from the counter substrate side (removal portion 16). As a result, only the gap of the liquid crystal layer widens only in the central portion in the defective pixel. By adopting such a configuration, it is possible to achieve the same effect as in the second embodiment. Furthermore, in this embodiment, it is not necessary to add a new manufacturing process, and it is possible to repair a defective pixel more easily.

In the first to third embodiments, a display device using liquid crystal has been described as an example. However, the display device is not limited thereto, and display is performed using orientation, and defective pixels are repaired with bubbles of laser irradiation. Applicable to any display device.

It is a top view of substantially 1 pixel of the display apparatus in Embodiment 1 of this invention. It is AA sectional drawing in FIG. It is AA sectional drawing in Embodiment 2 of this invention. It is AA sectional drawing in Embodiment 3 of this invention.

Explanation of symbols

1 scanning line, 2 video signal line, 3 source electrode, 4 pixel electrode, 5 drain electrode, 6 spacer, 7 insulating substrate, 8 counter substrate, 9 liquid crystal layer, 10 color filter R, 11 color filter G, 12 color filter B, 13 Black matrix, 14 bubbles, 15 protrusions, 16 removal part

Claims (5)

An insulating substrate having a display area formed thereon;
A counter substrate disposed to face the insulating substrate;
A spacer for holding the insulating substrate and the counter substrate at a predetermined interval;
Pixels constituting the display region and formed on the insulating substrate;
A video signal line connected to the pixel, a scanning line intersecting the video signal line via an insulating film, and
A display device comprising:
A display device comprising a plurality of spacers on each of the video signal line corresponding to one pixel and on the video signal line corresponding to a pixel adjacent to the one pixel. An insulating substrate having a display area formed thereon;
A counter substrate disposed opposite to the insulating substrate and having a color material formed on a surface thereof facing the insulating substrate;
Pixels constituting the display region and formed on the insulating substrate;
A scanning line that scans the pixel, and a video signal line that intersects the scanning line through an insulating film;
A display device comprising:
A display device comprising a protrusion on a side in a wiring direction of the video signal line at a tip portion of the color material corresponding to one pixel facing the insulating substrate. An insulating substrate having a display area formed thereon;
A counter substrate disposed to face the insulating substrate;
A spacer for holding the insulating substrate and the counter substrate at a predetermined interval;
Pixels constituting the display region and formed on the insulating substrate;
A scanning line that scans the pixel, and a video signal line that intersects the scanning line through an insulating film;
A defect repair method for a display device comprising:
When the plurality of spacers are provided on each of the video signal line corresponding to one pixel and the video signal line corresponding to a pixel adjacent to the one pixel, and the one pixel is a defective pixel, the insulating substrate side A defect repairing method for a display device, comprising the step of generating bubbles by irradiating a laser beam from An insulating substrate having a display area formed thereon;
A counter substrate disposed to face the insulating substrate;
A spacer for holding the insulating substrate and the counter substrate at a predetermined interval;
Pixels constituting the display region and formed on the insulating substrate;
A scanning line that scans the pixel, and a video signal line that intersects the scanning line through an insulating film;
A defect repair method for a display device comprising:
In the tip portion of the color material corresponding to one pixel facing the insulating substrate, a protrusion is provided on a side in the wiring direction of the video signal line, and when the one pixel is a defective pixel, the insulating substrate A defect repairing method for a display device, comprising a step of generating bubbles by irradiating a laser beam from the side. An insulating substrate having a display area formed thereon;
A counter substrate disposed to face the insulating substrate;
A spacer for holding the insulating substrate and the counter substrate at a predetermined interval;
Pixels constituting the display region and formed on the insulating substrate;
A scanning line that scans the pixel, and a video signal line that intersects the scanning line through an insulating film;
A defect repair method for a display device comprising:
Irradiating the defective pixel with laser light from the counter substrate side to remove a portion other than the side in the wiring direction of the video signal line in the color material of the defective pixel, thereby generating bubbles. A defect repair method for a display device.

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