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LCD

A technology of liquid crystal display and display area, applied in instruments, nonlinear optics, optics, etc., can solve the problems of light leakage, high transmittance, sacrificial transmittance, etc.

Inactive Publication Date: 2007-04-11
JAPAN DISPLAY INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, setting the backlight will result in increased power consumption
Also, there is another problem with transmissive LCDs: in bright ambient light, the display light dims when viewed, resulting in reduced visibility
[0018] However, in this combined reflective / transmissive liquid crystal display, there arises a problem that light leakage in a black display state tends to occur at the step between the reflective display area A and the transmissive display area B shown in FIG. , causing a decrease in contrast
However, the use of the black matrix 128 is at the expense of the transmittance
Therefore, a technique capable of achieving high transmittance and improving contrast has not been identified so far

Method used

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Embodiment Construction

[0039] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. In the drawings, specific parts of the present invention are exaggerated for convenience of explanation, and dimensional ratios between parts are not necessarily the same as actual ratios.

[0040] Referring to FIG. 1, this figure shows a plan view of a TFT substrate 1 in a combined reflective / transmissive liquid crystal display according to a first preferred embodiment of the present invention. A TFT substrate 1 is provided with a plurality of pixels 2 (one of which is shown), each of which is controlled by a TFT described below. A plurality of pixels 2 are arranged in a matrix. Gate lines 3 for supplying scan signals to the TFTs of each pixel 2 and signal lines 4 for supplying display signals to the TFTs of each pixel 2 are arranged perpendicular to each other so as to overlap the peripheral portion of each pixel 2 .

[0041] The TFT substrate ...

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Abstract

Disclosed herein is a liquid crystal display including a pair of substrates, a liquid crystal layer sandwiched between the substrates, a pixel having a transmissive display region for displaying with transmitted light and a reflective display region for displaying with reflected light, a drive element for driving the pixel, a signal line for supplying a display signal to the drive element, and a gate line for supplying a scan signal to the drive element. One of the substrates includes an insulating planarization layer for planarizing a step produced by the signal line and / or the gate line, and a transparent electrode formed on the insulating planarization layer in the transmissive display region. With this structure, the leakage of light in the black display state can be prevented to thereby improve the contrast, and the transmissive display region can be enlarged to thereby ensure a high transmissivity.

Description

technical field [0001] This invention relates to liquid crystal displays, and more particularly to improvements in combined reflective / transmissive liquid crystal displays. Background technique [0002] Liquid crystal displays are widely used in notebook personal computers, car navigation systems, personal digital assistants (PDAs), mobile phones, etc. by virtue of their thin thickness and low power consumption. Liquid crystal displays are generally classified into transmissive liquid crystal displays and reflective liquid crystal displays. A transmissive LCD has an internal light source called a backlight, and uses a liquid crystal panel to perform a transmissive display by turning on and off the light emitted from the backlight. On the other hand, reflective liquid crystal displays have a reflective plate or the like that reflects incident ambient light such as sunlight, and perform reflective display using a liquid crystal display panel by turning on and off the light re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/1335G02F1/136G02F1/1333G02F1/1343G02F1/1368
CPCG02F2203/09G02F1/136G02F1/133555G02F1/1335
Inventor 山口英将田中勉中村真治福永容子猪野益充重野信行仲岛义晴
Owner JAPAN DISPLAY INC
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