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Illuminating device for display device, back light unit and liquid crystal display

A technology for lighting devices and display devices, which is applied to parts, applications, and instruments of gas discharge lamps, and can solve problems such as difficulty in obtaining uniform brightness and non-uniform brightness, so as to prevent reflection and absorption and increase brightness uniformity , Increase the effect of luminous efficiency

Inactive Publication Date: 2007-07-11
SAMSUNG MOBILE DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the characteristic of fluorescent materials emitting light as points, it is difficult to obtain light with uniform brightness
Therefore, the non-uniformity of brightness is still a problem that must be solved

Method used

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  • Illuminating device for display device, back light unit and liquid crystal display
  • Illuminating device for display device, back light unit and liquid crystal display
  • Illuminating device for display device, back light unit and liquid crystal display

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Experimental program
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Effect test

Embodiment Construction

[0020] The present invention will now be described more fully with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown.

[0021] The present invention provides a lighting device for a display device, which includes: an upper substrate and a lower substrate facing each other at a predetermined distance; an anode electrode formed on the lower surface of the upper substrate; an anode electrode formed on the lower surface of the anode electrode. a fluorescent layer; a cathode electrode formed on the upper surface of the lower substrate; an electron emission source formed on the cathode electrode; and a reflection film provided between the electron emission source and the fluorescence layer and separated from each other, wherein the reflection film On the surface of the reflective film facing the phosphor layer is patterned to diffuse light emitted by the phosphor layer.

[0022] 3 is a schematic cross-sectional view of a lighting devic...

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PUM

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Abstract

The present invention relates to an illuminating device for a display apparatus , a backlight unit having the lluminating device, and a liquid crystal display using the illuminating device. The illuminating device includes: an upper substrate and a lower substrate facing each other and spaced apart from each other; an anode electrode arranged on a lower surface of the upper substrate; a phosphor layer arranged on a lower surface of the anode electrode; a cathode electrode arranged on an upper surface of the lower substrate; an electron emission source arranged on the cathode electrode; and a reflection film arranged between the electron emission source and the phosphor layer and respectively separated therefrom, the reflection film being patterned on a surface facing the phosphor layer to diffuse light emitted from the phosphor layer. The illuminating device provides improved brightness uniformity by forming a pattern on the reflection film so that light can be uniformly diffused or dispersed.

Description

technical field [0001] The present invention relates to a lighting device for a display device, a backlight unit having the lighting device, and a liquid crystal display having the backlight unit, and more particularly, to a lighting device for increasing the brightness uniformity of a display device, a lighting device having the lighting device A backlight unit, and a liquid crystal display with the backlight unit. Background technique [0002] Typically, non-emissive display devices such as liquid crystal displays (LCDs) use additional lighting devices such as backlight units. [0003] Conventional backlight units mainly use cold cathode fluorescent lamps (CCFLs) as line light sources and light emitting diodes (LEDs) as point light sources. However, the conventional backlight unit has high manufacturing cost due to its complicated structure, and high power consumption due to reflection and transmission of light because the light source is located at the side of the backli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13357H01J61/00G02F1/1335
CPCH01J61/35H01J63/02G02F1/133602H01J63/06B23P15/00B23P13/00B21D22/26B21D19/12B21H3/08
Inventor 金善一郑得锡宋炳权朴相铉申文珍
Owner SAMSUNG MOBILE DISPLAY CO LTD