Method and device for detecting ambient light brightness
A technology for detecting the environment and brightness, which is applied in the computer field, can solve problems other than the brightness of the environment, and achieve the effect of improving image quality and accuracy
Inactive Publication Date: 2017-02-01
SZ TELSTAR CO LTD
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However, when the projection device is projecting images to detect the brightness of the ambient light, what the light sensor senses is not only the brightness of the ambient light. When the projection device is working, the projected image itself is one of the light sources, and it may be higher than the actual ambient light. The brightness is still higher. At this time, the light sensor obtains the ambient light value including the brightness of the projected image of the projection device, not the real ambient light brightness.
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[0015] In order to further explain the technical means and effects of the present invention to achieve the intended purpose of the invention, the specific implementation, structure, features and effects of the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments.
[0016] see figure 1 , figure 1 It is a schematic diagram of an application scene of the method for detecting ambient light brightness provided by the first embodiment of the present invention.
[0017] The projection device 101 includes a light sensor 102 and a projection lens 103 , and the projection device projects an image 105 to a projection screen 104 through the projection lens 103 . The photosensitive sensor 102 can perceive the light from the direction of the projection screen 104, and the perception range is as follows: figure 1 The range indicated by the dotted ellipse line in the projection screen 104 .
[0018] see figure 2 , the...
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Disclosed is a method for detecting environmental light brightness. The method includes that a light sensor that is arranged on a projection device senses light that comes from the direction of a projection screen, a pre-set operation is performed at projection free time so that a first pre-set image and a second pre-set image can be displayed on the projection screen, light sensing values of the first pre-set image and the second pre-set image can be obtained, accordingly, a reference value and a valve value of environmental light brightness changes can be obtained, after the current environmental light brightness value is obtained, change direction and quantity value of practical environmental light brightness can be obtained according to the reference value and the valve value of the environmental light brightness changes, and current practical environmental light brightness value can be obtained according to the change direction and the quantity value of the practical environmental light brightness and the light sensing value of the second pre-set image. Besides, the invention further provides a device for detecting environmental light brightness. According to the method and the device for detecting environmental light brightness, the real-time detecting accuracy of the environmental light brightness can be improved while the projection device projects images.
Description
technical field [0001] The invention relates to the field of computer technology, in particular to a method and device for detecting ambient light brightness. Background technique [0002] With the development of projection equipment technology, there are more and more places where projection equipment is used, especially the emergence of micro projection equipment. Due to its small size, mobile portability and low power consumption, more and more people accept it, but its biggest disadvantage The reason is that the brightness of the projection lumen is not satisfactory, and the brightness of the ambient light has a great influence on the effect of the projected image, such as natural light, lights, etc. The existence of these light sources has a great impact on the projection quality of the projection equipment. For this reason, a technology that can dynamically change the local brightness of the image according to the ambient light parameters and image content, enhance the...
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IPC IPC(8): G09G5/10
Inventor 赵辉
Owner SZ TELSTAR CO LTD