A backlight adjustment structure and display device
A backlight adjustment and display device technology, which is applied in the direction of light guides, optics, optical components, etc., can solve the problems of anti-peeping display devices such as thick size, easy to confuse, and low pixel density, and achieve the goal of avoiding small pixel density and thinning thickness Effect
Active Publication Date: 2022-06-07
BOE TECH GRP CO LTD
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Problems solved by technology
[0007] The embodiment of the present invention provides a backlight adjustment structure and a display device, so as to improve the anti-peep display device in the prior art.
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[0074] Suppose the refractive index of the waveguide plate 1 is n1=1.52, the height of the focal point is f=30um, and the transmission angle θ1=65° of the light in the waveguide plate. period parameters, such as Figure 16 shown.
[0075] like Figure 17-Figure 19 Shown are the simulation results obtained according to the above design method. When the light in the waveguide plate 1 is transmitted in the forward direction, the gradient grating structure 3 above the waveguide plate 1 presents a convergent light extraction mode ( Figure 17 , Figure 18 ( Figure 19 ), the display mode is shared. The duty ratio of the variable period gradient grating structure 3 and the light extraction effect of the gradient grating structure influenced by the period can be designed according to specific application scenarios or backlight uniformity requirements.
[0076] The backlight adjustment structure provided by the embodiment of the present invention includes: multiple groups of gra...
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Abstract
The invention discloses a backlight adjustment structure and a display device to improve the prior art anti-peeping display devices which are relatively thick in size, easily confused between a sharing mode and an anti-peeping mode, and have low pixel density during display. The backlight adjustment structure includes: a waveguide plate, the light guide plate includes an opposite first side light incident surface, a second side light incident surface, and connects the first side light incident surface and the second side light incident surface A surface of the surface; a first light source, the first light source is located on the first side incident surface of the waveguide plate; a second light source, the second light source is located on the second side incident surface of the waveguide plate Optical surface; multiple groups of graded grating structures, the graded grating structures are located on the surface of the waveguide plate, and in the direction from the first light source to the second light source, within each group of the graded grating structures The grating period decreases sequentially.
Description
technical field [0001] The invention relates to the field of anti-peep display, in particular to a backlight adjustment structure and a display device. Background technique [0002] With the advancement of technology, displays have become the main terminal for disseminating information. At present, more and more attention has been paid to the security of information in some important fields. In order to prevent personal and national information from being peeped by criminals, more and more anti-peeping technologies are applied to monitors. [0003] The anti-peeping display device in the prior art usually uses a resin lens with a certain thickness arranged in the display device to realize different display functions, wherein a short focal length resin lens is used to realize the shared display mode, and a long focal length resin lens is used to realize the shared display mode. Anti-peeping display mode, but the anti-peeping display device with this structure will have the fo...
Claims
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IPC IPC(8): G02F1/13G02F1/13357G02B6/00
CPCG02F1/1323G02F1/133615G02B6/0058G02B6/0035G02B6/0068
Inventor 孟宪东谭纪风王维凌秋雨孟宪芹陈小川
Owner BOE TECH GRP CO LTD