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Liquid crystal display device

A technology for display devices and liquid crystal panels, applied in instruments, nonlinear optics, optics, etc., can solve problems such as difficult to accurately distinguish displayed information, inability to obtain contrast, light leakage, etc.

Pending Publication Date: 2021-06-29
SHANGHAI TIANMA MICRO ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a liquid crystal display device placed alone in a dark environment has a maximum contrast value of about 1000 to 2000, which is lower than that of an organic light emitting diode (OLED) display device (ie, millions).
This creates a problem that, like high dynamic range (HDR) images in recent years, liquid crystal display devices cannot provide sufficient realism when displaying images produced by imaging sources with rich black representation
[0003] On the other hand, another problem with liquid crystal display devices is that when a vehicle-mounted display device or an instrument for a ship is used at night, light from the backlight leaks into an area where black is displayed, causing a so-called black floating phenomenon, making it difficult to accurately Information displayed by region
However, as mentioned above, the contrast ratio of a conventional liquid crystal display device is at most about 2000:1.
The contrast required by the aforementioned applications cannot be obtained, hundreds of thousands to one

Method used

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Examples

Experimental program
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Embodiment approach 1

[0029] figure 1 A liquid crystal display device according to an embodiment of the present invention is schematically shown. The liquid crystal display device 10 includes a controller 110 and a liquid crystal display module 130 . The liquid crystal display module 130 includes a plurality of stacked (laminated) liquid crystal panels. figure 1 The structural example in includes two liquid crystal panels 131 and 132 .

[0030] The controller 110 converts an image signal received from the outside to generate a signal for causing the liquid crystal display module 130 to display an image. The controller 110 transmits the generated signal to the driving circuits 137 and 138 for the liquid crystal panels 131 and 132 of the liquid crystal display module 130 .

[0031] The liquid crystal display module 130 includes driving circuits 137 and 138 , liquid crystal panels 131 and 132 and a planar light source 133 . The liquid crystal panel 131 is a color liquid crystal panel for color dis...

Embodiment approach

[0088] Hereinafter, other arrangement examples of the dark lines are described. In an example to be described below, the gate line includes a plurality of parallel sub-gate lines, and the data line includes a plurality of parallel sub-data lines. TFTs are disposed at intersections between the sub-gate lines and the sub-data lines. One monochromatic pixel is supplied with data signals through a plurality of TFTs.

[0089] Therefore, the size of the TFT can be reduced so that dark portions generated by the TFT are not easily perceived. The number of sub-gate lines included in one gate line and the number of sub-data lines included in one data line are determined as needed. A gate line or a data line may be composed of one main line without including a plurality of sub lines.

[0090] Figure 9 A structure example in which each of the gate line and the data line includes a plurality of sub-lines is shown. Figure 9 The gate line in the structure example includes two parallel...

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Abstract

A display device includes: a first liquid crystal panel configured to display an image observed by an observer; and a second liquid crystal panel laid on the first liquid crystal panel. The second liquid crystal panel includes: a black matrix defining pixels; opaque gate lines disposed away from each other in the first direction; and opaque data lines disposed away from each other in a second direction different from the first direction. The lines of the black matrix and the gate lines disposed away from each other in the first direction constitute dark lines disposed at a predetermined pitch in the first direction. The lines of the black matrix and the data lines disposed away from each other in the second direction constitute dark lines disposed at a predetermined pitch in the second direction.

Description

technical field [0001] The present invention relates to a liquid crystal display device. Background technique [0002] Liquid crystal display devices are widely used from small mobile phones to large television monitors due to their characteristics for realizing low power consumption and high resolution. However, the contrast value of a liquid crystal display device placed alone in a dark environment is approximately 1000 to 2000 at the maximum, which is lower than that of an organic light emitting diode (OLED) display device (ie, millions). This poses a problem that liquid crystal display devices cannot provide sufficient realism when displaying images produced by imaging sources with rich black expression, like high dynamic range (HDR) images in recent years. [0003] On the other hand, another problem with liquid crystal display devices is that when a vehicle-mounted display device or an instrument for a ship is used at night, light from the backlight leaks into an area ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1347G02F1/1362
CPCG02F1/1347G02F1/136286G02F1/136209G02F1/13471G02F1/133512G02F1/1368
Inventor 佐佐木健廉谷勉池野英德
Owner SHANGHAI TIANMA MICRO ELECTRONICS CO LTD