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Patent Searching and Data


Title:
LIQUID CRYSTAL DISPLAY DEVICE
Document Type and Number:
Japanese Patent JP2001222001
Kind Code:
A
Abstract:

To suppress leak current in a pixel transistor due to the influence of multiple reflection light on the surface of a metal wiring in a liquid crystal display device, to reduce the rise in the temperature of a liquid crystal panel and the resistance of the wiring and to prevent the deterioration in the picture quality of a projected image.

In the liquid crystal panel produced by sealing a liquid crystal layer 2 between a driving device substrate 3 on which a pixel transistor 18 and metal wirings 23, 26 are formed and a counter substrate 1 on which a common transparent electrode film 8 and a black matrix film 7 are formed, the black matrix film 7 is composed of a metal film 5 in the entrance side of light having ≥40% reflectance for a light of 380 to 680 nm wavelength and a metal film 6 on the exist side of light having ≤40% reflectance for the light of 380 to 680 nm wavelength. The metal wiring 23, 26 are composed of metal films 21, 24 and low reflectance metal films 22, 25.


Inventors:
YAMANAKA KAZUHIKO
KATO TAKEHISA
Application Number:
JP2000030021A
Publication Date:
August 17, 2001
Filing Date:
February 08, 2000
Export Citation:
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Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
G02F1/1335; G02F1/136; G02F1/1368; G09F9/00; H01L29/786; (IPC1-7): G02F1/1335; G02F1/1368; G09F9/00; H01L29/786
Attorney, Agent or Firm:
Hiroyuki Ikeuchi (1 person outside)