JPH05892Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a mask design for a black matrix liquid crystal panel.

[Background of the idea]

In recent years, electronic devices such as liquid crystal televisions and portable games have been developed, and such electronic devices are required to be equipped with liquid crystal panels that have good contrast and are reliable.

[Conventional technology]

A conventional vertically stacked liquid crystal panel is shown in FIGS. 5 and 6. FIG. 5 is a pattern diagram showing a state in which a black matrix is formed, and FIG. 6 is a pattern diagram without a light shielding layer. In the figure, 501, 502
503 is a lower substrate transparent electrode layer formed on the lower substrate and is a timing electrode; 505 is a transparent electrode layer 501, 502, and 503 on both upper and lower substrates. 507 is a light-shielding layer laminated on the upper substrate transparent electrode layers 501 and 502, 509 is a light-shielding layer laminated on the lower substrate transparent electrode layer 503, and 511 is divided into upper and lower halves. This is the boundary between the upper and lower transparent electrode layers 501 and 502 on the upper substrate. As can be seen from FIG.
7,509, the periphery of the pixel 505 in most areas is almost covered with light shielding layers 507, 5.
09, exhibiting a black matrix structure, but since there are no upper and lower substrate transparent electrode layers 501, 502, 503 at the upper and lower boundary portions 511, no light shielding layers 507, 509 are provided. As a result, when an image is actually displayed on the liquid crystal panel, a white line appears at the upper and lower boundary portions 511, making it difficult to see.

[Purpose of invention]

An object of the present invention is to improve the above-mentioned drawbacks and provide a black matrix liquid crystal panel with good contrast and high reliability.

〔Example〕

FIG. 1 is a pattern diagram of a black matrix liquid crystal panel according to an embodiment of the present invention (the light shielding layer is not shown).

In FIG. 1, 101, 103, 105 indicate lower substrate transparent electrode layers formed on the lower substrate, 109,
Reference numeral 111 indicates an upper substrate transparent electrode layer formed on the upper substrate, and 113 indicates an upper and lower boundary portion. 1st
As can be seen from a comparison between the figure and FIG. The width of the lower substrate transparent electrode layer 105 disposed on the lower substrate is reduced. Furthermore, as can be seen from a comparison with FIG. 6, the upper substrate transparent electrode layer 111 disposed above the upper and lower boundary parts 113 extends downward, and accordingly The transparent electrode layer 109 of the upper substrate disposed on the lower side is shrunk. The configuration shown in FIG. 1 was adopted in order to cover the white line occurring at the upper and lower boundary portions 511 shown in the conventional example with a light-shielding layer to create a more complete black matrix. FIG. 2 is an exploded view showing a laminated state in which a light shielding layer is laminated on the upper and lower transparent electrode layers of FIG. 1. In FIG. 2, the same numbers as in FIG. 1 indicate the same members, and the explanation will be omitted. In FIG. 2, 201 is a light shielding layer laminated on the upper substrate transparent electrode layer 111, and 203, 205, and 207 are light shielding layers laminated on the lower substrate transparent electrode layer 103, 105. As can be seen from FIG. 2, in the upper and lower boundary portions 113, the light shielding layer 201 is provided only at the lower end of the upper substrate transparent electrode layer 111 on the upper side, and the lower substrate transparent electrode layers 103 and 105 have an arbitrary width at regular intervals. The light shielding layers 203 and 205 are the lower substrate transparent electrode layer 10
Further, each lower substrate transparent electrode layer 1 is attached to the upper end portion of the lower substrate transparent electrode layer 103 and the lower end portion of the lower substrate transparent electrode layer 105 so as to intersect with the longitudinal direction of
03, 105 in parallel with the longitudinal direction of the light shielding layer 20
7,208 are arranged. FIG. 3 shows a part of the black matrix of the present invention, in which the light-shielding layer shown in FIG. FIG. In FIG. 3, the same numbers as in FIGS. 1 and 2 indicate the same members, and their explanations will be omitted. As can be seen from FIG. 3, the upper and lower substrate transparent electrode layers 109, 111 and 103, 10 shown in FIGS. 1 and 2
5, and light shielding layers 201, 203, 205, 20
By adopting the structure of No. 7, 208, the light shielding layer 207 is laminated on the upper and lower boundary portions 113, making it possible to avoid the white line shown in the conventional example. In addition, in FIG. 3, the light shielding layer 20
The lower end of the light shielding layer 205 is located below the upper and lower boundary portions 113, and the upper end of the light shielding layer 205 is located below the upper and lower boundary portions 113.
The reason why the light-shielding layer is placed at the same position as the top edge is that the width of the light-shielding layer changes evenly due to misalignment of both the top and bottom substrates, and the size of the pixels on the entire surface of the LCD panel is always kept constant. This is because it is configured so that FIG. 4 is a pattern diagram showing another embodiment based on the present invention, 401, 403, 405, 4
07 is the upper substrate transparent electrode layer, 409, 411, 41
3 is a lower substrate transparent electrode layer, 415 and 417 are light shielding layers laminated on the lower substrate transparent electrode layer, and 419 is a light shielding layer laminated on the upper substrate transparent electrode layer. still,
The light shielding layer is used to lower the wiring resistance of the transparent electrode layer.
Ni or Cr is used.

[Effect of idea]

In the present invention, the transparent electrode layers on both the upper and lower substrates of the upper and lower boundary parts are configured as shown in FIG. 1, and a light shielding layer is laminated as shown in FIG. By providing a light-shielding layer, it is possible to create a black matrix liquid crystal panel with good contrast and high reliability without causing white lines on the screen when actually displaying a vertical black matrix liquid crystal panel. And so.

[Brief explanation of the drawing]

1 to 4 show an embodiment based on the present invention, FIG. 1 is a pattern diagram of a black matrix liquid crystal panel (the light-shielding layer is not shown), and FIG. 3 is an exploded view showing the laminated state of the light-shielding layer on the layer, FIG. 3 is an assembled pattern diagram of FIG. 2, FIG. 4 is a pattern diagram showing another embodiment, and FIGS. 5 and 6 show conventional examples. , FIG. 5 is a pattern diagram of a black matrix liquid crystal panel, and FIG. 6 is a pattern diagram for comparison with FIG. 1 (the light shielding layer is not shown). 109,111,401,403,405,4
07,501,502... Upper substrate transparent electrode layer, 1
01,103,105,409,411,41
3,503...lower substrate transparent electrode layer, 201,20
3,205,207,208,415,417,
419,507,509...light shielding layer, 113,5
11... Upper and lower boundary portion, 505... Pixels.

Claims (1)

[Claims for Utility Model Registration] (1) In a liquid crystal display device in which a black matrix is formed by a light-shielding layer that traverses the stripes of a matrix liquid crystal display device in which the data side electrodes have a top-bottom electrode structure, One width of the timing electrode at the abutting portion is configured to be wide and the other width is configured to be narrow, and the abutting portion of the upper and lower electrodes is configured at a position overlapping the wide timing electrode, and the width of the timing electrode is wide. A liquid crystal display device characterized in that a light shielding layer is provided on the upper and lower boundary sides of narrow electrodes. (2) The liquid crystal display device according to claim 1, which uses Ni for the light-shielding layer. (3) The liquid crystal display device according to claim 1, which uses Cr for the light-shielding layer.