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Backlight unit, backlight source, backlight source control method and display device

A technology for backlight units and backlight sources, which is applied in the field of backlight units and display devices, and can solve the problems of large thickness of direct-type backlight sources, and achieve the effects of avoiding difficult processing, improving contrast, and reducing the distance of light mixing

Inactive Publication Date: 2012-11-28
BOE TECH GRP CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the shortcomings of the prior art, the present invention provides a backlight unit, a backlight, a backlight control method, and a display device in order to solve the problem of a relatively large thickness of the direct-lit backlight in the prior art

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  • Backlight unit, backlight source, backlight source control method and display device
  • Backlight unit, backlight source, backlight source control method and display device
  • Backlight unit, backlight source, backlight source control method and display device

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Embodiment Construction

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them.

[0039] In the present invention, a plurality of independent backlight units are composed of a light guide plate and LEDs, and the direct type backlight source controls the plurality of backlight units respectively. The light emitted by the LED first passes through multiple light guide plates to diverge the light as much as possible. Compared with the traditional direct-type backlight, the distance of light mixing is significantly reduced, and the thickness of the device is reduced, and an ultra-thin display device can be obtained. And because only a plurality of light guide plates with smaller sizes are used, the problem of difficulty in processing large-size...

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Abstract

The invention relates to the technical field of liquid crystal display, and provides a backlight unit, a backlight source, a backlight source control method and a display device. The backlight unit consists of an LED (Light-Emitting Diode) and a light guide plate, wherein the light guide plate comprises a light introducing surface and a light emitting surface which is opposite to the light introducing surface; and light rays emitted by the LED enter the light introducing surface of the light guide plate, and are emitted from the light emitting surface of the light guide plate. The light guide plates and the LED construct a plurality of independent backlight units, and light rays emitted by the LED are scattered possibly through a plurality of light guide plates, so that the light mixing distance is reduced remarkably, the thickness of a device is reduced, and the problem of processing difficulty of a large-sized light guide plate is solved. Moreover, a plurality of backlight units are controlled separately, so that an entire backlight light source is controlled dynamically in real time, and the aims of lowering power consumption and increasing contrast are fulfilled.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to a backlight unit, a backlight source, a method for controlling the backlight source, and a display device. Background technique [0002] In the current flat panel display devices, liquid crystal display devices have occupied the mainstream position, and in the existing liquid crystal display devices, since the liquid crystal panel itself cannot emit light, the backlight source is an indispensable part of the liquid crystal display device. In the backlight of liquid crystal display devices, although cold cathode fluorescent lamps (CCFL, Cold Cathode Fluorescent Lamp) once occupied a dominant position, but because LED (Light Emitting Diode, light-emitting diode) has a wide color gamut, adjustable white point, high-profile The advantages of light efficiency and long life have recently been developed as a new type of backlight for liquid crystal display devices, and ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21S2/00F21V8/00H05B37/02G09G3/36
CPCY02B20/42Y02B20/40
Inventor 张凯亮
Owner BOE TECH GRP CO LTD
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