Liquid-crystal displaying device with adjustable viewing angle and method thereof

A liquid crystal display, narrow viewing angle technology, applied in static indicators, instruments, nonlinear optics, etc., can solve problems such as inability to adjust by the user, lowering of the brightness of the LCD panel 200, and lower brightness.

Active Publication Date: 2005-05-11
AU OPTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the disadvantage of this viewing angle control method is that: the louver structure 110 must be added outside the display during use, causing inconvenience in use; as part of the light L is absorbed by the louver structure 110, the display brightness will drop by half The above; and the adjustment of its viewing angle is to increase or decrease at the same time, which cannot meet the various needs of users for switching viewing angles, such as providing users with only front view and left side view.
[0006] However, the disadvantage of this viewing angle control method is: when the light scattering element 210 is switched to the voltage conduction state ON, the backlight Lb will be partially reflected when passing through the light scattering element 210, causing the brightness of the liquid crystal panel 200 to decrease; and as As mentioned in the previous example, this viewing angle control method can only provide two modes of narrow viewing angle and wide viewing angle, and cannot be adjusted according to the viewing angle required by the user, thus limiting the variety of options for viewing angle adjustment
[0008] However, as described in the above three examples, the current LCD structures with adjustable viewing angles often have the disadvantages of decreased brightness and reduced contrast when switching viewing angles, and cannot switch the viewing angle to a viewing angle other than the one required by the user. , so neither is a true viewing angle adjustment method

Method used

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  • Liquid-crystal displaying device with adjustable viewing angle and method thereof
  • Liquid-crystal displaying device with adjustable viewing angle and method thereof
  • Liquid-crystal displaying device with adjustable viewing angle and method thereof

Examples

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no. 1 example

[0028] Please refer to Figure 4A , which is a schematic cross-sectional view of a liquid crystal display according to the first embodiment of the present invention. The liquid crystal display 400 includes a backlight assembly 410 , a grating 420 , an edge light device 430 and a display panel 440 . The backlight assembly 410 may be a direct type backlight assembly or an edge type backlight assembly. The grating 420 is, for example, a louver-like structure made of light-absorbing material to limit the light passing through it within a certain range and form approximately parallel light rays. The side light device 430 includes a transparent light guide plate 432 and a side light source 434 , such as a light tube or a light emitting diode. The diffused light guide plate 432 can pass through the light incident from below, and can also be used to diffuse the light emitted by the side light source 434 onto the display panel 440 in the form of scattering.

[0029] Please refer to ...

no. 2 example

[0034] Please refer to Figure 5A, which is a schematic cross-sectional view of a liquid crystal display according to the second embodiment of the present invention. The liquid crystal display 500 includes a backlight assembly 510 , a grating 520 , an edge light device 530 and a display panel 540 . The backlight assembly 510 may be a direct type backlight assembly or an edge type backlight assembly. The grating 520 is a louver-like structure made of light-absorbing material to limit the light passing through it within a certain range and form approximately parallel light rays. The side light device 530 includes a transparent directional light guide plate 532 , a first side light source 534 and a second side light source 536 . The first and second side light sources 534 and 536 are, for example, lamp tubes or light emitting diodes. The light guide plate 532 can pass through the light incident from below, and as Figure 5B As shown, the light guide plate 532 includes a first...

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PUM

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Abstract

A display with adjustable visual angle consists of display panel, backlight device set under sidelight device and the sidelight device set beneath the display panel. The side light device comprises the first sidelight source set at the first side edge of the light guide plate. The display method includes providing a single direction light to display panel at narrow angle mode and providing a scattering light to the display panel at wide angel mode.

Description

technical field [0001] The present invention relates to a liquid crystal display with adjustable viewing angle and its method, and in particular to an adjustable viewing angle liquid crystal display and its method which can be switched by electric signals to adjust the viewing angle required by users. Background technique [0002] With the advancement of technology, consumers have more opportunities to use mobile products with displays in public areas, such as mobile phones, notebook computers, etc., but if consumers want to maintain personal privacy when using in public areas, then they A monitor with adjustable viewing angle will be required. At present, there are the following three common methods for controlling the viewing angle of a liquid crystal display. [0003] figure 1 It is a schematic diagram of adjusting the viewing angle of a liquid crystal display by using a louver structure in the prior art. Please refer to figure 1 , add a louver structure 110 in front ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/133G02F1/1335
Inventor 蔡孟璋林永伦张志明
Owner AU OPTRONICS CORP
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