Backlight brightness adjustment circuit of projector
A backlight brightness and circuit adjustment technology, which is applied in the direction of electric lamp circuit layout, optics, light source, etc., can solve the problem of difficult adjustment of light output modules, achieve high performance, increase service life, and reduce dead point rate.
Inactive Publication Date: 2015-11-04
苏州市英富美欣科技有限公司
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- Abstract
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Problems solved by technology
[0007] The technical problem to be solved by the present invention is to provide a projector backlight brightness adjustment circuit, which solves the problem that the light output module is difficult to adjust in the prior art
Method used
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[0020] Below in conjunction with accompanying drawing, structure and working process of the present invention will be further described.
[0021] Such as figure 1 As shown, a projector backlight brightness adjustment circuit includes a light output module, a backlight module and a backlight brightness adjustment module, wherein the light output module is used to output light energy of video information, and the backlight module is used to provide auxiliary power for the light output module. Backlight, the backlight brightness adjustment module is used to adjust the output brightness of the backlight module according to the light energy output by the light output module. The backlight brightness adjustment module includes LED lights and driver chips. The LED lights include three groups, namely red LED lights, Green LED lights, blue LED lights, the driver chip includes three, respectively IC1 to IC3, each driver chip drives a group of LED lights of the same color, each signal ou...
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Abstract
The invention discloses a backlight brightness adjustment circuit of a projector. The backlight brightness adjustment circuit comprises a light output module, a backlight module and a backlight brightness adjustment module, wherein the light output module is used for outputting light energy of video information, the backlight module is used for providing auxiliary backlight for the light output module, the backlight brightness module is used for adjusting the output brightness of the backlight module according to the light energy output from the light output module, and comprises LED lamps and driving chips, and a fixed resistor and an adjustable resistor are connected in series between a constant-current driving pin of each driving chip and a signal ground. By the backlight brightness adjustment circuit of the projector, the backlight brightness can be automatically adjusted according to the output intensity of the light output module, and an effective compensation effect is achieved.
Description
technical field [0001] The invention belongs to the application field of electronic products, and in particular relates to a projector backlight brightness adjustment circuit. Background technique [0002] A projector, also known as a projector, is a device that projects or reflects images or videos onto the screen through digital light processing technology or LCD liquid crystal imaging technology. Image and video signals for playback. Projectors are widely used in education, business, engineering, household and other places. According to the working principle, projectors are mainly divided into DLP, LCD and other types. [0003] DLP is the abbreviation of "Digital Light Processing", which is digital light processing imaging technology. In short, the image signal is digitally processed, and then the light is projected out. It is based on the digital micromirror component developed by TI (Texas Instruments) - DMD (Digital Micromirror Device) to complete the technology of...
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Login to View More IPC IPC(8): G03B21/20H05B37/02
Inventor 孙志君方继广唐猛王国荣
Owner 苏州市英富美欣科技有限公司