Projection device and method for projection device to sense ambient light luminance in real time
A projection device and ambient light technology, applied in the field of projection display, can solve problems such as screen flickering, long intervals, and inability to reflect changes and adjustments of ambient light in time
Inactive Publication Date: 2018-09-28
QISDA OPTRONICS (SUZHOU) CO LTD +1
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Problems solved by technology
In the prior art, detection is usually performed by inserting a special image frame. The inserted image may be very different from the normal video image, and the screen flickers when watching, which affects the viewing experience of the user; it can also be used in the standby state of the projection device. It is detected by projecting a special test image, but the interval between the detected ambient light and the actual playback is long, and the change and adjustment of the ambient light cannot be reflected in time
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[0051] In order to have a further understanding of the purpose, structure, features, and functions of the present invention, the following detailed descriptions are provided in conjunction with the embodiments. Certain terms are used in the description and claims to refer to particular elements. Those of ordinary skill in the art will appreciate that manufacturers may refer to the same element by different terms. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. "Include" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to".
[0052] refer to Figure 1A As shown, a schematic diagram of the first embodiment of the method for real-time sensing of ambient light brightness by the projection device of the present invention is disclosed.
[0053] A. Receive a video signal, th...
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The invention provides a projection device and a method for the projection device to sense ambient light luminance in real time. Each frame of image of an obtained video signal is segmented into a first subframe of image and a second subframe of image which are obtained through double frequency projection. A preset image is taken as an original frame corresponding to the second subframe of image and the first subframe of image corresponding to the original frame is adjusted, so the first subframe of image and the second subframe of image are equivalent to the original frame, namely, when the first subframe of image and the second subframe of image are projected rapidly, the difference between the first subframe of image and the second subframe of image, and the original frame is not liableto be observed by eyes. Through insertion and sensing of the sub-frames of two different preset images, a parameter value of current practical ambient light is obtained. The real-time sensing is realized without influencing the watching experience. A projection effect can be adjusted in real time when a video is watched. A watching effect is relatively good.
Description
technical field [0001] The invention relates to the field of projection display, in particular to a projection device and a method for sensing ambient light brightness in real time. Background technique [0002] With the development of projection display technology, projection systems and equipment are widely used. Projection display is based on its display principle, and its image quality is easily affected by ambient light. The existence of light sources such as natural light and indoor lighting has a great impact on the projection image quality of projection equipment. Therefore, it is necessary to dynamically change the performance of the image according to the ambient light conditions, enhance the contrast and color of the projected image, and adjust the color temperature, etc., so as to make the projected image clearer and more realistic. The application of this technology depends on accurate and real-time detection of ambient light. In the prior art, detection is us...
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IPC IPC(8): H04N9/31
CPCH04N9/3179H04N9/3182H04N9/3191
Inventor 李德原施柏维
Owner QISDA OPTRONICS (SUZHOU) CO LTD