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Projection light source white balance regulator circuit

A technology for adjusting circuits and white balance, applied in optics, instruments, projection devices, etc., can solve problems such as increasing research and development costs, increasing circuit design complexity, and image color cast, so as to increase the scope of application, achieve compatibility and universal use sexual effect

Active Publication Date: 2016-11-23
QINGDAO HISENSE LASER DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the use of laser projection products, due to the influence of environmental cleanliness, temperature, and the operation of the equipment itself, the primary color lights of the light source, such as red, green, and blue primary color lights, will change in proportion under the originally set white balance conditions, thus Causes changes in white balance, resulting in color temperature shifts, color casts in image screens, and degradation of projection image quality
[0003] The light source in the above-mentioned laser projection products may be a monochromatic laser light source and a fluorescent light source or an LED light source, or a two-color laser light source and a fluorescent light source or an LED light source, or a pure three-color laser light source. Due to the different types of laser light sources, resulting in The driving circuit of the laser light source is complex, and it is necessary to design the corresponding white balance adjustment circuit according to different light source types, which increases the complexity of the circuit design and increases the research and development cost.

Method used

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  • Projection light source white balance regulator circuit
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  • Projection light source white balance regulator circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Figure 1A This is a schematic diagram of the structure of a projection light source white balance adjustment circuit provided in the first embodiment of the present invention, see Figure 1A , The projection light source white balance adjustment circuit includes an adjustment signal module 1, a light source gating control module 2, an enable control module 3, a timing control module 4, a first primary color light output module 5, a second primary color light output module 6 and a third Primary color light output module 7.

[0038] Among them, the adjustment signal module 1 outputs the primary color light brightness adjustment signal, the output end of the adjustment signal module 1 is connected to the input end of the light source gating control module 2, and the output end of the light source gating control module 2 is connected to the first primary color light output module 5, The input ends of the two primary color light output module 6 and the third primary color light o...

Embodiment 2

[0051] The second embodiment of the present invention provides a projection light source white balance adjustment circuit, such as Figure 2A As shown, the primary color light brightness adjustment signal specifically output by the adjustment signal 21 includes: a red light brightness adjustment signal R_PWM, a blue light brightness adjustment signal B_PWM, and a green light brightness adjustment signal G_PWM. Among them, the red light brightness adjustment signal R_PWM and the green light brightness adjustment signal G_PWM are output to the light source gating control module, and the blue light brightness adjustment signal B_PWM is output to the second primary color light output module.

[0052] And, further, the primary color light brightness adjustment signal output by the adjustment signal module 21 further includes: a yellow light brightness adjustment signal Y_PWM. In a specific implementation, the yellow light brightness adjustment signal Y_PWM is output to the second prima...

Embodiment 3

[0078] The embodiment of the present invention provides a schematic structural diagram of a projection light source white balance adjustment circuit, such as image 3 Shown.

[0079] It should be noted that the light source gating control module 32 is specifically a turn-on gating device, such as image 3 As shown, the input terminal CBA is used as a strobe control signal, through different high and low level combinations, so that the inputs of its input pins a, b, c are output from ax or ay, bx or by, cx, where cy The pin is grounded and is always low level output. The input pins a, b, and c are used to input the specific primary color light brightness adjustment signal and the first red light enable control signal.

[0080] Among them, different combinations of strobe control signals C, B, A are used to strobe different light source types. For the current situation where the projection light source is a laser light source, there are three types, one is a monochromatic laser ligh...

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PUM

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Abstract

The invention discloses a projection light source white balance regulator circuit. The regulator circuit comprises a regulating signal module for providing and outputting various primary color radiance adjustment signals, a light source gating control module, primary color light output modules, an enable-control module and a time-sequence control module, wherein each primary color radiance adjustment signal is output to each primary color radiance output module according to the light source type selected by the light source gating control module and each primary color radiance time sequence signal output by the time sequence control module, and is lighted to radiate, so that the primary color radiance can be regulated, and the white balance can be regulated finally. According to the technical scheme, compatibility and universality of a projection light source white balance regulator circuit can be realized, and the application range of the projection light source white balance regulator circuit can be increased.

Description

Technical field [0001] The invention relates to the field of optoelectronics, in particular to a white balance adjustment circuit of a projection light source. Background technique [0002] With the development of science and technology, more and more scenarios require the use of laser projection products. With the use of laser projection products, due to the environmental cleanliness, temperature, and the operation of the equipment itself, the primary colors of the light source, such as the red, green and blue primary colors, will change in proportions under the originally set white balance conditions. The white balance is changed, the color temperature is shifted, and the color of the image is cast, which reduces the quality of the projected picture. [0003] The light source in the above-mentioned laser projection products may be a monochromatic laser light source and a fluorescent light source or an LED light source, or a two-color laser light source and a fluorescent light so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/20
CPCG03B21/2033G03B21/2053G03B21/206
Inventor 崔荣荣郭大勃李健锋
Owner QINGDAO HISENSE LASER DISPLAY CO LTD