One-dimensional edge light dynamic backlight for liquid crystal display
A liquid crystal display and dynamic backlight technology, applied in the field of one-dimensional edge-lit dynamic backlight sources, can solve the problems of inability to achieve adjustment effects, inability to achieve energy-saving display effects, inability to achieve dynamic backlighting, etc., to achieve enhanced effects and reduced power consumption. consumption effect
Inactive Publication Date: 2011-02-02
SHANGHAI JIAO TONG UNIV +1
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Problems solved by technology
However, the traditional side-illuminated backlight module cannot achieve dynamic backlight. At most, it can only adjust the brightness of the light-emitting surface of the backlight module as a whole. There is no way to achieve the adjustment effect similar to the two-dimensional dynamic backlight, so it cannot match the required front panel Display effect, can not achieve better energy saving and improve the display effect
Method used
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[0025] The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.
[0026] Such as Figure 1-Figure 2 As shown, this embodiment includes: an LED light bar 1, a light guide plate 2, a reflector 3 and a PWM controller 4, wherein: the LED light bar 1 is located outside the light incident surface 6 of the light guide plate 2, and the light guide plate 2 is A flat rectangular parallelepiped, including: a light-emitting surface 5, a light-incoming surface 6, and four sides 7, the reflector 3 is arranged on the four sides 7 of the light guide plate 2, and the PWM controller 4 is directly connected or fed back to the LED light bar 1 .
[0027] The LED light bar 1 is composed of 42 LED pa...
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Abstract
The invention discloses a one-dimensional edge light dynamic backlight for a liquid crystal display in the technical field of liquid crystal display. The one-dimensional edge light dynamic backlight comprises an LED light bar, a light guide plate, a reflector and a PWM controller, wherein the LED light bar is positioned on the outer side of an emergent surface of the light guide plate; the light guide plate is a flat cuboid, and comprises the emergent surface, an incident surface and other four surfaces; the reflector is closely attached to the four surfaces of the light guide plate except the emergent surface and the incident surface; and according to different working modes, the PWM controller is in direct connection or feedback connection with the LED light bar. The device realizes the technical scheme of the one-dimensional edge light dynamic backlight with the two-dimensional dynamic backlight characteristics similar to a direct illumination-type backlight module.
Description
technical field [0001] The invention relates to a device in the technical field of liquid crystal displays, in particular to a one-dimensional edge-light dynamic backlight light source for liquid crystal displays. Background technique [0002] The principle of thin film transistor-liquid crystal display (TFT-LCD) is to use liquid crystal to control the passage of polarized light to realize the display function. The main structure of a traditional TFT-LCD panel is usually composed of a liquid crystal panel, a backlight module and a light source. The liquid crystal panel includes two orthogonal polarizers, a p polarizer and an s polarizer, a glass light guide plate, an alignment film, and a liquid crystal layer. color filter. The principle is to control the orientation of the liquid crystal by applying a voltage on the ITO conductive unit and then forming an electric field on the liquid crystal layer, thereby controlling the polarization state of the outgoing light emitted fr...
Claims
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Login to View More IPC IPC(8): G02F1/13357F21V23/00F21V17/00F21S8/00G09G3/34F21V13/00F21Y101/02G09G3/36
Inventor 崔晴宇郭小军曹太鑫李奇典
Owner SHANGHAI JIAO TONG UNIV