Time-sharing and sectional controllable field emission backlight device
A backlight device and field emission technology, applied in the direction of electroluminescence light source, lighting device, light source, etc., can solve the problems of insufficient spatial uniformity of backlight distribution, reduction of effective backlight resolution, affecting image quality, etc., to suppress color splitting , Improve the display image quality, improve the effect of light effect
Inactive Publication Date: 2011-09-14
SOUTHEAST UNIV
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Problems solved by technology
However, the current LED backlight adopts a point-emitting mode, and the spatial uniformity of the backlight distribution is not enough, which affects the image quality. At the same time, different backlight units overlap each other seriously, and the effective backlight resolution is reduced.
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[0021] Such as figure 1 (front view) and figure 2 As shown in (side view), a field emission backlight device adjustable in time-division and division, mainly includes the following parts: gate electrode layer 1 controllable in division; cathode substrate 2; cathode electrode layer 3; cathode emission layer 4; support body 5; vacuum cavity 6; anode phosphor layer 7; anode electrode layer 8; anode substrate 9; grid control circuit 10; cathode control circuit 11; anode control circuit 12.
[0022] Partition-controllable gate electrode layer 1: the gate electrode layer can be prepared separately, or directly on the back of the cathode substrate. The gate electrode layer is composed of a certain number of mutually independent gate electrode blocks. The grid electrode blocks can be square, rectangular, polygonal, circular, etc.; each grid block is independent of each other and arranged in an array or honeycomb;
[0023] The cathode substrate 2 is used to directly support the cat...
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The invention discloses a time-sharing and sectional controllable field emission backlight device. The backlight device comprises a sectional controllable grid electrode layer (1), a cathode base plate (2), a cathode electrode layer (3), a cathode emission layer (4), a support body (5), a vacuum cavity (6), an anode fluorescent powder layer (7), an anode electrode layer (8), an anode base plate (9), a grid electrode control circuit (10), a cathode control circuit (11), an anode control circuit (12) and the like. By the backlight device, a backlight part displayed by the traditional liquid crystal display can be substituted, color filtering pieces can be removed, the lighting efficiency is improved, and energy consumption is reduced by about two thirds. The backlight device can flexibly adjust the distribution of brightness and colors output by backlight on time position and space position according to image content, so that the display quality of an image is improved, the manufacturing cost is reduced, and the energy consumption is reduced.
Description
technical field [0001] The invention relates to a field emission backlight device controllable by time division and division in a display device, which belongs to the field of display device design and manufacture. Background technique [0002] Because of the advantages of thinness and lightness, liquid crystal display has overcome other various display technologies and has become the current mainstream display technology. However, due to the non-active light-emitting characteristics of the liquid crystal display, it is necessary to provide a special backlight. Under normal circumstances, the backlight passes through different structural units such as polarizers, liquid crystal layers, color filters, and polarizers after uniform light and color mixing. As we all know, the first layer of polarizer makes the input light intensity lose 1 / 2, and the color filter makes the light intensity lose 2 / 3 again; when passing through the second layer of polarizer, the light intensity p...
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IPC IPC(8): H05B33/08G09G3/34H05B44/00
Inventor 张宇宁崔渊李晓华雷威
Owner SOUTHEAST UNIV