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LED (Light emitting Diode) on-edge backlight

A technology of backlight source and LED chip, applied in the field of LED side-to-side vertical backlight source, can solve the problems of waste of resources and incomplete utilization of light, and achieve the effect of uniform brightness

Active Publication Date: 2012-11-21
昆山琉明光电有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is easy to make the light of the LED PKG not fully utilized, resulting in a waste of resources

Method used

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  • LED (Light emitting Diode) on-edge backlight
  • LED (Light emitting Diode) on-edge backlight
  • LED (Light emitting Diode) on-edge backlight

Examples

Experimental program
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Effect test

Embodiment Construction

[0025] The present invention will be further described below in conjunction with accompanying drawing and embodiment:

[0026] like Figure 1~6 The shown side LED backlight unit 1 includes a lead frame 200 and an LED chip 100 .

[0027] Wherein: the LED chip 100 is formed by contacting a P-type semiconductor and an N-type semiconductor, and light will be generated when current flows from the P-type semiconductor to the N-type semiconductor. The LED chip 100 includes a bottom surface 101, a top surface 102 parallel to the bottom surface 101, a first side 103 connecting the bottom surface 101 to the top surface 102, a second side 104, a third side 105 and a fourth side 106, four sides are perpendicular to the bottom surface 101 and the top surface 102 respectively. The first side 103 and the second side 104 have the same width and extend along the X axis, the third side 105 and the fourth side 106 have the same width and extend along the Y axis, and the X axis is perpendicular...

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PUM

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Abstract

The invention relates to an LED (Light emitting Diode) on-edge backlight. The backlight comprises a light guide plate and an illumination unit, wherein a plurality of LED on-edge backlight units are arranged in the illumination unit, each LED on-edge backlight unit comprises a pin frame and an LED chip; a first reflection plane and a second reflection plane are arranged on a first terminal part; the first reflection plane is arranged relative to the first side of the LED chip, and the second reflection plane is arranged relative to the second side of the LED chip; an included angle of between55 and 70 degrees is formed between the first reflection plane and the second reflection plane; and the maximum distances between the first reflection plane and the first side and between the second reflection plane and the second side are less than 0.3 times of extending widths of the third side and the fourth side in the Y-axial direction. The LED on-edge backlight can effectively input light emitted in the LED on-edge backlight into the inside of the light guide plate, and ensures that the emitted light vertically enters the periphery of the light guide plate and enters deep in the light guide plate more easily to lead the lightness of the whole on-edge backlight to be uniform.

Description

technical field [0001] The invention relates to an LED side vertical backlight source. Background technique [0002] Light-emitting diode package (LED PKG) is a kind of packaging of one or more light-emitting diode (LED) chips for lighting materials, flashes and backlights used in cameras. [0003] At present, there are many cases of using backlights on display screens. At the same time, as the thickness of display screens becomes thinner, side-mounted LED backlights that can meet the requirements are widely used. However, because of the thin thickness of the light guide plate of the LED side-standing backlight, the light emitted from the LED PKG is very scattered, and a considerable part of the light emitted from the LED PKG cannot enter the light guide plate vertically. In this way, only a part of the light emitted from the LED PKG is reflected on the light guide plate, and cannot enter the inside of the light guide plate or even enter the center of the light guide plate....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F21S8/00F21V7/00F21V17/00F21V23/06F21Y101/02F21Y115/10
CPCH01L2224/48091H01L2224/48247
Inventor 吴承玄
Owner 昆山琉明光电有限公司