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Method and system for adaptive brightness control of projection equipment

A technology of brightness control and projection equipment, applied in the field of adaptive brightness control of projection equipment, can solve the problems of too bright or too dark image area, poor viewing experience, fatigue, etc., to improve accuracy and precision, improve accuracy and scientific, the effect of simplifying the calculation method of light quantity

Active Publication Date: 2022-02-08
HENGLIN HOME FURNISHINGS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the projection screen is properly matched with the projector, high-quality projection effects can be obtained. The brightness of the projected image mainly depends on the projection brightness of the projector and the brightness of the surrounding environment. feel tired
[0003] In the prior art, the brightness adjustment of projection equipment is usually manually adjusted, artificially fill in light or turn off the light, and close the room. On the one hand, the manual adjustment method is time-consuming and labor-intensive. It needs to be adjusted according to the current environment before each use. And manual adjustment can easily lead to too bright or too dark the image area, and the viewing experience is very poor.
[0004] There are also some methods of automatic brightness adjustment in the prior art, for example: CN110798671A, CN108989779B, CN106791737B, etc. The above-mentioned automatic brightness adjustment method is basically based on the principle of adjusting the projection device according to other information such as ambient light, traffic flow, and playback file type. However, the above-mentioned brightness adjustment process is for the entire projected picture, and the projected picture is too bright or too dark, which is usually localized. Clear partial projected screen
Therefore, in the prior art, the method of adjusting the light of the projected picture according to the ambient light is mainly based on the adjustment of the whole picture, and the brightness of the adjusted picture is still partially unclear, which affects the viewing experience.
[0005] In the prior art, there is also a sub-regional brightness adjustment method: for example: CN111107333A, etc., but the above-mentioned brightness adjustment uses the brightness attenuation of the projected picture and the source picture as reference information, and also does not refer to the influence of the ambient brightness on the brightness of the projected picture to perform regional brightness adjustment
[0006] In addition, when the existing technology adjusts the brightness according to the ambient light, the calculation of the ambient light is replaced by the average value collected by the sensor multiple times. Adjustment sensitivity is not enough

Method used

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  • Method and system for adaptive brightness control of projection equipment
  • Method and system for adaptive brightness control of projection equipment
  • Method and system for adaptive brightness control of projection equipment

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Experimental program
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Embodiment 1

[0056] An embodiment of the present invention provides a projection device adaptive brightness control method, such as figure 1 shown. The projection device adaptive brightness control method includes:

[0057] Step S1: collecting a first projection image;

[0058] The projection equipment adaptive brightness control method uses a projector to project images, videos and other files onto an imaging device for display. Projection equipment is usually used in conference rooms and other scenes to display shared content for multiple people to watch at the same time. In conventional conference rooms, methods such as manually turning off the light in front of the imaging device and closing the curtains are usually used to adjust the viewing experience. The above adjustments The process requires manual repeated experiments on various adjustment methods, and the adjustment is limited. The present invention controls the brightness of the projection device through automatic detection a...

Embodiment 2

[0101] An embodiment of the present invention provides an adaptive brightness control system for a projection device. Such as figure 2 with image 3 As shown, the projection system includes a projector 1, an imaging component 2, a backlight component 4, and an image sensor 5. The projector 1 is used to project images. The projector 1 and the imaging component 2 are perpendicular to each other and the tops of the projector 1 and the imaging component 2 are located at On the same horizontal line, the projection window of the projector 1 faces the imaging component 2, and the image file connected to the projector 1 can be projected on the imaging component 2, and the imaging component 2 can adjust the backlight when the image is projected and displayed, so that the imaging component 2 The brightness of the image projected on the camera is adjustable. The image sensor 5 is used to collect the image on the imaging component 2 and send the signal to the control component 3. The co...

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Abstract

The invention discloses a projection device adaptive brightness control method and system, which are characterized in that the first projection image is collected; the segmentation granularity of the first projection image is determined, and the first projection image is divided according to the segmentation granularity to obtain the second projection image; Calculating the lack of light of each segmented area in the second projected image; adjusting the brightness of the corresponding segmented area according to the lack of light of each segmented area. The present invention divides the projected picture, and then adjusts the brightness of the divided area. By adjusting the brightness of the projected picture in different areas, the brightness of the whole picture is improved, and the phenomenon of partial overexposure and local clarity caused by external light sources is avoided, and the projection is improved. The accuracy of screen brightness adjustment.

Description

technical field [0001] The present invention relates to the technical field of projection equipment, in particular to a projection equipment adaptive brightness control method and system. Background technique [0002] A projector, also known as a projector, is a device that can project images or videos onto a screen. It can be connected to a computer, VCD, DVD, BD, game console, DV, etc. through different interfaces to play corresponding video signals. Projectors are widely used in homes, offices, schools and entertainment venues. The projection screen is one of the most commonly used products in the peripheral equipment of the projector. If the projection screen is properly matched with the projector, high-quality projection effects can be obtained. The brightness of the projected image mainly depends on the projection brightness of the projector and the brightness of the surrounding environment. Feel tired. [0003] In the prior art, the brightness adjustment of project...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N9/31
CPCH04N9/3179H04N9/3155
Inventor 王江林王郑兴姚林强王星
Owner HENGLIN HOME FURNISHINGS CO LTD