Light source switching device and display device
A light source switching and light source technology, which is applied in the direction of lighting devices, light source fixing, lighting device components, etc., can solve the problems of single function and poor collimation effect of light output, and achieve the effect of reducing the impact and improving the collimation effect
Inactive Publication Date: 2018-06-29
BOE TECH GRP CO LTD
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Problems solved by technology
[0005] The purpose of the present disclosure is to provide a light source switching device and a display device to solve the problems of the existing collimation backlight device with single function and poor light collimation effect
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[0048] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
[0049] Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus repeated descriptions thereof will be omitted. Some of the block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically separate entities. These functional entities ...
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Abstract
The invention provides a light source switching device and a display device and relates to the technical field of display. The light source switching device comprises a backlight module and light source switching modules. Each light source switching module comprises a first diffraction lens unit, a second diffraction lens unit and a lens stop arranged between the first diffraction lens unit and the second diffraction lens unit, wherein the first diffraction lens unit is close to the backlight module, the second diffraction lens unit is far away from the backlight module, and the lens stop is located at the focal plane of the second diffraction lens unit. In the first light source state, each lens stop forms multiple apertures, each first diffraction lens unit focuses light emitted by the backlight module to the apertures of the corresponding lens stop, and each second diffraction lens unit adjusts a light beam given out from the apertures of the corresponding lens stop to be a collimated beam. In the second light source state, the lens stops, the first diffraction lens units and the second diffraction lens units all control light emitted by the backlight module to achieve direct transmission. By the adoption of the light source switching device, switching between scattered backlight and collimated backlight can be achieved, and the collimation effect on the outgoing beam can beimproved.
Description
technical field [0001] The present disclosure relates to the field of display technology, and in particular, to a light source switching device and a display device including the light source switching device. Background technique [0002] figure 1 A schematic diagram of the collimated backlight technology based on dot-matrix backlight is shown schematically. Wherein, the dot matrix light source 01 of the backlight module can be placed on the object focal plane of the collimator lens array, so that each dot matrix light source 01 can fall on the object focus of each lens unit 02 in the collimator lens array , so as to achieve beam collimation within the lens aperture range. [0003] However, this collimated backlight technology has the following disadvantages: first, the device function is relatively single; second, the spherical aberration of the plano-convex single lens is relatively large, so it may affect the collimation of the light output; third, each lens unit can o...
Claims
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IPC IPC(8): F21V14/00F21V5/04G02F1/13G02F1/1335
CPCF21V5/045F21V14/003G02F1/1313G02F1/1335
Inventor 高健陈小川孟宪东谭纪风王维卢鹏程
Owner BOE TECH GRP CO LTD