lens for led light source

A technology of LED lens and LED light source, which is applied in optics, nonlinear optics, instruments, etc., and can solve the problem of dark edges and corners

Active Publication Date: 2021-07-06
HUIZHOU CHINA STAR OPTOELECTRONICS TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the problem of dark edges and four corners in the current backlight solution

Method used

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  • lens for led light source
  • lens for led light source
  • lens for led light source

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Embodiment Construction

[0034] The following descriptions of the various embodiments refer to the accompanying drawings to illustrate specific embodiments in which the invention may be practiced. The directional terms mentioned in the present invention, such as [top], [bottom], [front], [back], [left], [right], [inside], [outside], [side], etc., are only for reference The orientation of the attached schema. Therefore, the directional terms used are used to illustrate and understand the present invention, but not to limit the present invention. In the figures, structurally similar elements are denoted by the same reference numerals.

[0035] In the direct-lit backlight solution of the prior art, the slope design causes the LED to be far away from the edge, and the overall brightness distribution of the backlight module presents a phenomenon that the edge is darker (especially the four corners are darker), and the overall brightness of the edge LED is compared with the center Insufficient area, showi...

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Abstract

The invention provides a lens for a light emitting diode light source. The lens includes: a bottom surface; an inner curved surface formed by upward bending of the middle part of the bottom surface, and the inner curved surface is a light incident surface; an outer curved surface is formed by upward bending of the middle part of the bottom surface, and the outer curved surface is the The light-emitting surface of the lens, the inner curved surface is arranged in the outer curved surface; when the LED packaged with the lens is used for a direct-lit LED backlight source of a liquid crystal display, it can improve the brightness uniformity and chromaticity uniformity of the light, and improve the brightness of the backlight. The quality of the module solves the problem of dark edges and four corners in the current backlight solution.

Description

technical field [0001] The invention relates to the field of photoelectric display technology, in particular to an LED lens that can be used for a direct-type liquid crystal display backlight source. Background technique [0002] Traditional cold cathode tube (CCFL) backlights for liquid crystal displays have been gradually replaced by light emitting diode (LED) backlights. However, unlike the line light source cold cathode tube, the LED is a point light source that emits a beam of light at a certain angle. When it is used as a backlight source for a direct-lit liquid crystal display (LCD), hundreds or even thousands of three primary color LEDs are required to be arranged in a certain array to form a surface light source. , and then illuminate the LCD panel. [0003] Converting from point light source to uniform surface light source is the key technology of LED backlight. The uniformity of the surface light source formed by the LED array is closely related to the light int...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/13357
CPCG02F1/133603G02F1/133606G02F1/133607
Inventor 丘永元
Owner HUIZHOU CHINA STAR OPTOELECTRONICS TECHNOLOGY CO LTD
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