Switchable peep-proof display device and backlight

A technology of anti-peeping display device and backlight, which is applied in optics, nonlinear optics, instruments, etc., and can solve the problems of high cost of anti-peeping film and difficulty in mass production of products

Inactive Publication Date: 2016-05-04
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this solution is that it is difficult to realize the mass production of the product due to the high cost of the 3M anti-peeping film

Method used

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  • Switchable peep-proof display device and backlight
  • Switchable peep-proof display device and backlight
  • Switchable peep-proof display device and backlight

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] An embodiment of the present invention provides a switchable anti-peeping display device, referring to Figure 2 ~ Figure 4 As shown, the display device includes: a backlight source 14 arranged in sequence, an optical element with a collimating or center-focusing effect (such as a Fresnel lens 15 in the figure), a switchable diffuser 13 and a display panel 3; the backlight source 14 is used to provide backlight for the display panel 3; the switchable diffuser 13 can be switched between a transparent state and a scattering state, and when in a transparent state, the switchable diffuser 13 does not change the propagation direction of the backlight; The sheet 13 scatters the backlight to obtain a wide viewing angle exit backlight.

[0030] In this embodiment, the backlight 14, the optical element with collimating or center-focusing effect, the switchable diffuser 13 and the display panel 3 are arranged in sequence, the backlight source 14 provides backlight, and the optica...

Embodiment 2

[0038] The embodiment of the present invention also provides a backlight suitable for a switchable anti-peeping display device, such as Figure 6 and Figure 7 As shown, the backlight includes a backlight component 11 arranged in sequence, an optical element with a collimating or center-focusing effect (such as a Fresnel lens 15 in the figure), and a switchable diffuser 13; the backlight component is a component of the backlight. Components such as light sources, light guide plates and optical films, etc., the backlight component 11 here should at least include a light source, which can be used to provide backlight; the switchable diffuser 13 can be switched between a transparent state and a scattering state, and when it is in a transparent state, all The above-mentioned switchable diffusion sheet does not change the propagation direction of the backlight; in the scattering state, the switchable diffusion sheet 13 scatters the backlight to obtain a wide viewing angle backlight...

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PUM

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Abstract

The invention discloses a switchable peep-proof display device and a backlight, and relates to the field of display. Switchover between a narrow view angle and a wide view angle can be achieved, and cost is low. The switchable peep-proof display device comprises the backlight, an optical part with a collimation or center focus effect, a switchable diffusion sheet and a display panel which are sequentially connected; the backlight is used for providing back light for the display panel, the switchable diffusion sheet can be switched between the transparent state and the scattering state, and the switchable diffusion sheet does not change the propagation direction of the back light when in the transparent state and scatters the back light when in the scattering state to obtain the wide-view-angle back light.

Description

technical field [0001] The invention relates to the field of display, in particular to a switchable peep-proof display device and a backlight source. Background technique [0002] The existing anti-peep technology includes glasses-type technology and naked-eye technology. The glasses-type technology separates and protects confidential information through external auxiliary devices (such as auxiliary glasses), and the naked-eye technology realizes anti-peeping by controlling the angle of incident light. At the same time, there are relatively few technologies that can switch between anti-peeping and normal display. The director backlight technology can be used to switch between wide and narrow viewing angles. However, this technology has extremely high requirements for the production of light guide plates and LED lighting bars. It is difficult for suppliers to meet the design requirements. [0003] In addition, the 3M anti-spy film alone can only realize the anti-spy display,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13G02F1/13357
CPCG02F1/1323G02F1/133606G02F1/133607
Inventor 李文波
Owner BOE TECH GRP CO LTD
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