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Light excitation-diffusion sheet for backlight unit and backlight unit for liquid crystal display using the same

A liquid crystal display and backlight device technology, applied in light guides, optics, instruments, etc., can solve the problems of brightness and efficiency changes, shortened service life, etc., and achieve the effect of improving uniformity

Inactive Publication Date: 2006-05-31
KDT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the external electrode fluorescent lamp is advantageous in that it can prevent a shortened service life due to deterioration of the electrode quality, however, it has the disadvantage that its brightness and efficiency vary according to the length of the electrode

Method used

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  • Light excitation-diffusion sheet for backlight unit and backlight unit for liquid crystal display using the same
  • Light excitation-diffusion sheet for backlight unit and backlight unit for liquid crystal display using the same
  • Light excitation-diffusion sheet for backlight unit and backlight unit for liquid crystal display using the same

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Experimental program
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Embodiment Construction

[0024] The light excitation-scattering plate of the present invention will be described in more detail below with reference to the accompanying drawings.

[0025] Such as Figure 3a to Figure 3d As shown in , the light excitation-scattering plates 100, 100b, 100c and 100d are composed of a light excitation material 30 for exciting and enhancing the light emitted from the light source, a light scattering material 40 for dispersing and scattering the light emitted from the light source, and Composition of resin 50 in the form of a matrix for uniformly distributing the light-exciting material and light-scattering material. In order to uniformly disperse the materials and particles and to improve the moldability of the board during forming, besides these materials, an anti-settling agent, an antifoaming agent, a binder or the like may be added.

[0026] Examples of the photoexcitable material 30 used in the present invention include inorganic fluorescent materials, organic fluore...

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Abstract

Disclosed is a light excitation-scattering plate for a backlight device, the light excitation-scattering plate is suitable for absorbing a part of the light emitted from a light source of blue wavelength or a mixture of blue wavelength and at least one non-blue wavelength, and emitting light from the The light source emits light of different wavelengths and allows the remainder of the light emitted from the light source to pass through the plate. Wherein, the light excitation-scattering plate contains a light excitation material that excites and enhances light emitted from the light source, and a light scattering material that disperses and scatters light emitted from the light source. The light excitation material and the light scattering material are evenly distributed in the light excitation-scattering plate. Edge-light type and direct-light type backlight devices having scattering and prism functions, good color purity, and improved light efficiency can be produced at low cost using the light excitation-scattering plate.

Description

technical field [0001] The present invention relates to a backlight device for a liquid crystal display (LCD), and more particularly to a backlight device for a liquid crystal display (LCD) having improved color reproducibility by using a novel diffuser plate at low cost backlight unit. Background technique [0002] Generally, a liquid crystal display does not emit its own light onto the display image, but is a non-emissive display that relies on external light to provide an image. Therefore, if there is no light source, the image cannot be seen from the liquid crystal display in a dark place. A backlight unit installed on the back of a liquid crystal display shines light onto the LCD panel to display images in a dark place. Such a backlight arrangement is currently used in non-emissive displays, such as liquid crystal displays, and flat-type light source devices, such as illuminated signs. [0003] Backlight devices are classified into direct light type devices and edge ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1335
CPCG02B6/0051G02F1/1335
Inventor 高永旭李南宪安永主
Owner KDT
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