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Light mixing film for mixing light from light emitting diode backlight source and light emitting diode backlight source

A technology of light-emitting diodes and backlight sources, which is applied to semiconductor devices, light sources, point light sources, etc.

Inactive Publication Date: 2010-03-31
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The defect of the existing technology is that the direct-type LED backlight structure must provide a certain light mixing distance in order to mix the light of the LED array evenly, which increases the thickness, which is not conducive to the development of ultra-thin, low power consumption, and high-efficiency LCD TVs. Development in the direction of color gamut and high contrast

Method used

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  • Light mixing film for mixing light from light emitting diode backlight source and light emitting diode backlight source
  • Light mixing film for mixing light from light emitting diode backlight source and light emitting diode backlight source
  • Light mixing film for mixing light from light emitting diode backlight source and light emitting diode backlight source

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Embodiment Construction

[0015] In order to achieve uniform light mixing without increasing the light mixing distance of the direct LED backlight and the number of LEDs, the embodiment of the present invention adds a layer of light mixing film above the LED lamp group, and the light mixing film corresponds to each A set of dots is set directly above a group of LED lights, which can partially transmit the strong light emitted by the LEDs and partially reflect it back to the bottom reflective film, thus reducing the generation of bright spots and mixing the light evenly within a shorter distance .

[0016] figure 2 It is a structural schematic diagram of an embodiment of the light mixing film used for light mixing of light-emitting diode backlight sources in the present invention. The light mixing film includes a substrate 21 and dots 22 arranged on the substrate 21 . The substrate 21 can be made of a light-transmitting material with high transmittance such as polymethyl methacrylate (PMMA), polycarb...

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Abstract

The invention relates to a light mixing film for mixing light from a light emitting diode (LED) backlight source and an LED backlight source. The light mixing film comprises a substrate and mesh points arranged on the substrate, wherein the substrate is manufactured by a light-transparent material; and the mesh points are used for scattering light. The LED backlight source comprises the light mixing film, wherein the light mixing film is arranged between an LED and a diffusing sheet; and the mesh points on the light mixing film are at least arranged on the substrate right above the LED. Through the light mixing film, stronger light rays emitted by the LED can be partially transmitted and partially reflected back to the bottom reflecting film, thereby reducing the production of bright spots; and thus, light rays can be evenly mixed within a shorter distance, thereby reducing the light mixing distance of the direct LED backlight source and meeting the ultra-thin requirement for the direct LED backlight source.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to a light-mixing film and an LED backlight that can reduce the light-mixing distance and are used for light-mixing of a light-emitting diode (LED) backlight. Background technique [0002] At present, LED backlight is gradually becoming the mainstream LCD backlight due to its many advantages such as mercury-free environmental protection, good color reproduction, and long life. It is estimated that by 2010, the utilization rate of Notebook LED backlight modules will increase from the current 20% to 63%, replacing cold cathode fluorescent lamps (CCFL) as the dominant one. In terms of large-size LCD TVs (TVs), the application of dynamic area control technology based on LED backlights and LED lights with high color reproduction has substantially improved the color reproduction, contrast and power consumption of TVs. At present, major TV manufacturers such as Samsung, Son...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21V5/08G02F1/13357F21Y101/02F21Y103/10F21Y115/10
Inventor 孙小斌张卓万丽芳张丽蕾赵星星王庆江
Owner BOE TECH GRP CO LTD
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