Source: http://www.google.com/patents/US6456344?dq=7,007,239
Timestamp: 2017-10-17 15:41:05
Document Index: 641328294

Matched Legal Cases: ['art 103', 'art 104', 'art 101', 'art 102', 'art 101', 'art 102', 'art 103', 'art 104', 'art 101', 'art 102', 'art 104']

Patent US6456344 - LCD having a pattern for preventing a wavy brightness irregularity at the ... - Google Patents
The present invention provides a liquid crystal display device which is capable of suppressing wavy brightness irregularity which occurs in a display screen edge portion in the vicinity of drivers or tape carrier packages (TCPs) on which the drivers are mounted, owing to the mounting of the drivers or...http://www.google.com/patents/US6456344?utm_source=gb-gplus-sharePatent US6456344 - LCD having a pattern for preventing a wavy brightness irregularity at the edges of the screen due to drive elements or tape carrier packages
Publication number US6456344 B1
Application number US 09/438,920
Publication number 09438920, 438920, US 6456344 B1, US 6456344B1, US-B1-6456344, US6456344 B1, US6456344B1
Inventors Atsushi Nemoto, Masumi Sasuga, Katsuhiko Shibata
Patent Citations (2), Referenced by (46), Classifications (12), Legal Events (5)
LCD having a pattern for preventing a wavy brightness irregularity at the edges of the screen due to drive elements or tape carrier packages
US 6456344 B1
a liquid crystal display panel having a pair of substrates being superposed one on another, a liquid crystal layer sealed therebetween, drive elements or tape carrier packages being mounted on an end of the one of the pair of substrates so as to be juxtaposed with each other along the end of one of the pair of substrates;
an optical guide plate being disposed along one of surface sides of the liquid crystal display panel;
a linear shaped light source being disposed at one side of the optical guide plate;
an optical diffusing sheet being disposed between the one of surface sides of the liquid crystal display panel and the optical guide plate;
an optical reflecting sheet being disposed at an opposite side of the optical guide plate to the one of surface sides of the liquid crystal display panel; and
a pattern for preventing brightness irregularity from appearing in a display screen area of the liquid crystal display panel, which has a plurality of regions being formed on at least one edge of at least one of the optical guide plate, the optical diffusing sheet, and the optical reflecting sheet and being juxtaposed along the at least one edge thereof, and each of the plurality of regions is extended towards the display screen area and confronts an area lying between a pair of the drive elements of the tape carrier packages.
2. A liquid crystal display device according to claim 1, wherein said pattern on said optical guide plate, said optical diffusing sheet, or said optical reflecting sheet has a wavy shape which is convex toward a middle portion of said liquid crystal display panel.
a pattern for preventing brightness irregularity from appearing in a display screen area of the liquid crystal display panel, the pattern has a plurality of regions being formed on an edge of at least one of the optical guide plate, the optical diffusing sheet, and the optical reflecting sheet and being juxtaposed along the at least one edge thereof, the edge of the at least one of the light guide plate, the optical diffusing sheet, and the optical reflecting sheet is extended from the one side of the optical guide plate where the linear shaped light source is disposed, and the plurality of regions are extended towards the display screen area respectively and respective extension lengths thereof are reduced in accordance with distances from the one side of the optical guide plate to the plurality of regions respectively.
6. A liquid crystal display device according to claim 5, wherein the pattern on the optical guide plate, the optical diffusing sheet, or the optical reflecting sheet has a wavy shape which is convex toward a middle portion of the liquid crystal display panel.
FIG. 16 is a block diagram showing a TFT liquid crystal display panel of the TFT liquid crystal display module shown in FIG. 10 and circuits arranged along a peripheral portion of the panel. In this example, drain drivers IC1 to ICM and gate drivers IC1 to ICN are chip-on-glass-mounted (COG-mounted) with drain side terminal lines DTM and gate side terminal lines GTM as well as an anisotropic conductive layer or an ultraviolet rays hardening resin layer or the like, all of which are formed on either one of the transparent insulating substrates of the liquid crystal display panel. This example is applied to a liquid crystal display panel having 1024×3×768 effective dots which support for XGA specifications (pixel size=307.5 μm×307.5 μm). For this reason, ten (M=10) 240-output drain driver ICs and six 101- and 100-output (N=6) gate driver ICs are COG-mounted along one longer side and one shorter side of the transparent insulating substrate of the liquid crystal display panel, respectively. A drain driver part 103 is arranged on the bottom side of the liquid crystal display panel and a gate driver part 104 is arranged on the left side of the liquid crystal display panel, and a controller part 101 and a power supply part 102 are also arranged on the same left side. The controller part 101 and the power supply part 102 are interconnected to the drain driver part 103 and to the gate driver part 104 by electrical connecting means JN2 and JN1, respectively. Incidentally, the controller part 101 and the power supply part 102 are arranged on the reverse side of the gate driver part 104.
The six IC chips shown on the left side of FIG. 11 are driver ICs for a vertical scanning circuit, while the ten IC chips shown on the bottom side of FIG. 11 are driver ICs for a video signal driving circuit, and all of the driver IC chips are chip-on-glass-mounted (COG-mounted) on a transparent insulating substrate with the use of an anisotropic conductive layer (ACF2 in FIG. 14) or an ultraviolet rays hardener or the like. In a conventional method, tape carrier packages (TCPs) on which driver IC chips are mounted by tape automated bonding (TAP) are connected to the liquid crystal display panel PNL by using an anisotropic conductive layer. In the case of COG mounting, since driver ICs are directly used, the aforementioned TAB step becomes unnecessary to reduce the entire process, and moreover, a tape carrier also becomes unnecessary to realize the effect of reducing primary costs. Moreover, COG mounting is suited to mounting techniques for the high-definition and high-density liquid crystal display panel PNL. Specifically, in the present embodiment, a TFT liquid crystal display module having a 12.1-inch screen size of 800×3×600 dots is designed as an SVGA panel. For this reason, the size of each of red (R), green (G) and blue (B) dots is made 307.5 μum (gate-line interval)×102.5 μm (drain-line interval), and one pixel is made of a combination of three color dots, red (R), green (G) and blue (B) and has a size of 307.5 μm×307.5 μm. For this reason, if the number of the drain side terminal lines DTM is made 800×3, the interval between adjacent terminal lines becomes not greater than 100 μm which is a presently usable connection interval limit in TCP-mounting. On the other hand, in the case of COG mounting, although depending on the material of an anisotropic conductive layer to be used, such presently usable minimum value is about 70 μm with regard to the interval between adjacent bumps BUMP of the driver ICs (refer to FIG. 14), and about 50 μm×about 50 μm with regard to the area of intersection with each base interconnection line. For this reason, in the present embodiment, drain driver ICs are arranged in a row on a longer side of the liquid crystal display panel PNL, and drain lines are draw out on the longer side. Accordingly, the interval between adjacent bumps BUMP of the driver ICs (refer to FIG. 14) and the area of intersection with each base interconnection line can be designed to be about 70 μm and about 50 μm×about 50 μm, respectively, whereby it is possible to provide a far more reliable connection with each base interconnection line. Since the interval between adjacent gate lines is large enough (307.5 μm), the gate side terminal lines GTM are drawn out on a shorter side of the liquid crystal display panel PNL. However, in the case of a higher-definition liquid crystal display panel, the gate side terminal lines GTM can also be alternately drawn out on its two opposite shorter sides.
JPH10340612A * Title not available
JPH10340613A * Title not available
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U.S. Classification 349/64, 349/62, 349/150
International Classification G09F9/00, G02F1/13, G02F1/1335, G02F1/1333, G02F1/13357, G02F1/1345
Cooperative Classification G02F1/13452, G02F1/133615
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:NEMOTO, ATSUSHI;SASUGA, MASUMI;SHIBATA, KATSUHIKO;REEL/FRAME:010399/0146