Liquid crystal display device switchable between reflective mode and transmissive mode by employing active reflective polarizer

A reflective polarizer and liquid crystal display technology, applied in instruments, optical components, optics, etc., can solve the problems of complex manufacturing process of transflective LCD devices, achieve low energy consumption and improve visual characteristics

Inactive Publication Date: 2010-02-24
SAMSUNG DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the manufacturing process of transflective LCD devices is complicated

Method used

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  • Liquid crystal display device switchable between reflective mode and transmissive mode by employing active reflective polarizer
  • Liquid crystal display device switchable between reflective mode and transmissive mode by employing active reflective polarizer
  • Liquid crystal display device switchable between reflective mode and transmissive mode by employing active reflective polarizer

Examples

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Embodiment Construction

[0027] Hereinafter, a switchable LCD device according to an exemplary embodiment of the present invention will be described more fully with reference to the accompanying drawings.

[0028] Figure 3A , Figure 3B , Figure 4A with Figure 4B is a schematic diagram of a switchable LCD device according to an exemplary embodiment of the present invention. Referring to the drawings, a switchable LCD device 500 includes a backlight 100 , an active reflective polarizer 200 and a liquid crystal panel 300 .

[0029] The active reflective polarizer 200 is controlled by an applied magnetic field to switch between a reflector that reflects incident light and a reflective polarizer that reflects incident light having a magnetic field component along a first direction and transmits light having a magnetic field component along a second direction. For incident light with magnetic field components in two directions, the second direction is perpendicular to the direction of the applied ma...

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Abstract

A liquid crystal display (LCD) device that is switchable between a transmissive mode and a reflective mode is provided. The LCD device includes a backlight; an active reflective polarizer which operates as a reflector that reflects incident light or as a reflective polarizer that reflects light of a first polarization and transmits light of a second polarization perpendicular to the first polarization, based on whether a magnetic field is applied; and a liquid crystal panel that modulates incident light to form images. The liquid crystal panel includes a liquid crystal layer, a first polarizerthat is disposed on a rear surface of the liquid crystal layer and faces the active reflective polarizer, and a second polarizer that is disposed on a front surface of the liquid crystal layer.

Description

technical field [0001] The device according to the invention relates to a liquid crystal display (LCD) device that is switchable between a reflective mode using external light and a transmissive mode using a backlight by employing an active reflective polarizer. Background technique [0002] Recently, as the supply of portable devices such as cellular phones, personal digital assistants (PDAs) and the like increases, display devices capable of operating with low power consumption and having excellent visual characteristics in outdoor environments are required. In order to meet these requirements, research on a transflective LCD having a combination of a transmissive LCD using a backlight and a reflective LCD using external ambient light has been actively conducted. [0003] figure 1 is a schematic diagram of a transflective LCD device disclosed in US Patent No. 6,654,087. refer to figure 1 , The transflective LCD device includes a backlight device 20 , a lower substrate 4...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1335
CPCG02F1/133536G02B5/3058
Inventor 黄圣模李文圭赵胜来
Owner SAMSUNG DISPLAY CO LTD
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