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Switchable view angle control device and display system

A viewing angle control and display system technology, applied to static indicators, optics, instruments, etc., can solve problems such as performance degradation and insufficient viewing angle control, and achieve the effect of increasing functions

Active Publication Date: 2019-11-26
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Firstly, viewing angle control is insufficient for some applications, and secondly, the added pretilt required for this configuration degrades the performance of the LCD as the image panel

Method used

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  • Switchable view angle control device and display system
  • Switchable view angle control device and display system
  • Switchable view angle control device and display system

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Embodiment Construction

[0076] Embodiments of the present invention will now be described with reference to the drawings, wherein like reference numerals are used to refer to like elements throughout. It should be understood that the drawings are not necessarily drawn to scale.

[0077] figure 1 is a schematic diagram depicting a liquid crystal device (LCD) configuration 10 conventional in the art. figure 2 is a schematic diagram depicting an LCD configuration 20 according to an embodiment of the present invention. In conventional configuration 10 , backlight 12 emits light 14 to viewing angle control film 16 , and the light then illuminates a liquid crystal display (LCD) image panel 18 . The viewing angle control film may be a louver film known in the art. Although there is some attenuation of off-axis light by viewing angle control film 16, as indicated by the arrow schematically illustrating light beam 14, the shielding of off-axis light is generally insufficient to provide a fully private mod...

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PUM

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Abstract

A switchable view angle control device for a privacy view display system includes an electrically switchable view angle control LCD that is operable in a first state and a second state; a front polarizer located on a viewing side of the switchable view angle control LCD; and a polarized light source located on a non-viewing side of the switchable view angle control LCD that emits polarized light.When the switchable view angle control LCD in the first state, the view angle control device operates in a narrow angle view mode in which off-axis polarized light from the polarized light source is changed by the switchable view angle control LCD so that the off-axis light is absorbed by the front polarizer, and on-axis light passes through the switchable view angle control LCD and the front polarizer. When the switchable view angle control LCD is in the second state, the view angle control device operates in a wide angle view mode in which the polarized light from the polarized light sourceis scattered by the switchable view angle control LCD and passes through the front polarizer.

Description

technical field [0001] The present invention relates to a liquid crystal display device, especially a liquid crystal display device switchable between a narrow viewing angle mode (also called a private mode) and a wide viewing angle mode (also called a public mode). Background technique [0002] With the increased use of portable computing devices having liquid crystal displays (LCDs), such as smartphones, laptops, tablets, etc., users have become concerned that other individuals are able to read sensitive or private information. Accordingly, many portable computing devices can operate in a narrow viewing angle mode (also known as a private mode), where information is only largely visible to on-axis observers, and in a wide viewing angle mode (also known as a public mode). operation, where information is generally visible to off-axis observers at wider viewing angles within the capabilities of the device. Such devices are typically switchable between a narrow field-of-view ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13G02F1/1334G02F1/1335G02F1/1337
CPCG02F1/1323G02F1/133528G02F1/1334G02F1/133753G02F1/13345G02F1/13471G02F1/13363G02F1/133514G09G3/36G02F1/134309G09G2320/028G09G2320/068G02F1/133603G02F1/133541G02F1/133631G02F1/133638G02F1/134372
Inventor N·J·史密斯安德鲁·埃克曼H·霍普金村尾岳洋刘智允
Owner SHARP KK
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