Field emission backlight

A technology of backlight source and field emission, applied in the field of backlight source, can solve the problems of uneven light emission and uneven output light of the phosphor layer thickness and electron phosphor layer.

Active Publication Date: 2008-10-15
TSINGHUA UNIV +1
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Problems solved by technology

[0005] However, in the traditional field emission backlight, the light is directly emitted from the anode, and the uneven thickness of the phosphor layer and the unevenness of the electrons emitted by the cathode can lead to uneven light emission of the phosphor layer.
Moreover, since the light is directly emitted from the anode, the final outgoing light is not uniform

Method used

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Examples

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Embodiment Construction

[0014] refer to figure 1 The field emission backlight 10 of the first embodiment of the technical solution includes a cathode substrate 11 , a transparent conductive layer 112 , a cathode 12 , a fluorescent layer 13 , a light reflection layer 14 , an anode substrate 15 and a support bar 16 .

[0015] The cathode substrate 11 is opposite to the anode substrate 15 . The support bar 16 is disposed between the cathode substrate 11 and the anode substrate 15 to form a space between the cathode substrate 11 and the anode substrate 15 . Since a vacuum is drawn between the cathode substrate 11 and the anode substrate 15, the support bar 16 must be made of a material with higher strength, such as metal or ceramics.

[0016] The cathode substrate 11 is formed of a transparent material, such as a transparent glass plate. The transparent conductive layer 112 may be an indium tin oxide thin film, which is disposed on the surface of the cathode substrate 11 near the anode substrate 15 . ...

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Abstract

The invention relates to a field emission backlight, comprising an anode substrate, a cathode substrate and a fluorescent layer arranged on the anode substrate. A light reflecting layer is arranged between the anode substrate and the fluorescent layer; the cathode substrate is transparent; the cathode substrate is provided with a transparent conducting layer and an enphoric cathode; the enphotic cathode comprises a carbon nanotube; and emergent light of the field emission backlight has high-uniform property.

Description

technical field [0001] The invention relates to a backlight source, in particular to a field emission backlight source. Background technique [0002] Planar light sources are widely used in many fields, especially in the field of information display. A variety of passive display devices, including liquid crystal displays, require a planar light source that can emit light uniformly to provide a light source for them. In the prior art, optical methods are generally used to process point light sources or line light sources to obtain a uniform plane light source. For example, the backlight panel of liquid crystal uses light guide plates and diffusers to disperse line light sources into a plane light source. [0003] However, the planar light source device working in this conversion mode cannot directly obtain planar light, and must be obtained by subsequent optical processing. Moreover, it is also necessary to assemble precision-processed optical components, such as microlense...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13357H05B33/00G02F1/1335
CPCH01J63/02H01J1/304H01J31/127H01J2201/30469H01J2329/0455
Inventor 刘亮唐洁郑直潜力范守善
Owner TSINGHUA UNIV
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