Video signal searching method for a projection device and the projection device thereof
A technology for video signal and projection equipment, applied in the field of video signal search method of projection equipment and projection equipment, can solve the problems of wasting user time and spending a certain amount of time, and achieve the effect of improving satisfaction
Inactive Publication Date: 2009-03-25
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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Problems solved by technology
At present, a very complex algorithm invented by Texas Instruments is generally used to detect and judge whether the video signal interface has a valid video signal output, and it takes a certain amount of time to detect a video signal interface.
In fact, when people use projection equipment, they all use relatively fixed video signal sources, such as desktop computers, notebook computers, TV sets, video recorders, etc., searching and judging effective video signal sources in sequence will waste the user's time and cannot Let users get the desired results in a timely manner
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[0019] Such as figure 1 As shown, in a preferred embodiment, the projection device 100 includes a first detection unit 10, a switching unit 12, a display unit 14, a storage unit 16, a search switch 18, a search unit 20, a second detection unit 22, a control module 24, The first video signal interface 26 , the second video signal interface 28 and the third video signal interface 30 . The control module 24 includes a control unit 242 and a setting unit 244 .
[0020] Wherein, the first video signal interface 26 is used for receiving a first video signal from a first video signal source (not shown in the figure). The second video signal interface 28 is used for receiving a second video signal from a second video signal source (not shown in the figure). The third video signal interface 30 is used for receiving a third video signal from a third video signal source (not shown in the figure). The first video signal interface 26 can be a video graphics array (D-Sub, commonly known ...
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The invention provides a video signal search method of a projection device, and the video signal search method is used for carrying out the search of a plurality of video signal interfaces containing a first video signal interface. The method comprises the following steps: whether a power supply terminal of the first video signal interface has the voltage output or not is detected and judged, if the power supply terminal has the voltage output, a video signal which is output by the first video signal interface is switched and displayed. The invention further provides the projection device. The video signal search method can know whether a video signal source is accessed or not through the detection of the power supply terminal of the video signal interface when the projection device is in the power on state or in the no display state, thereby rapidly switching and displaying information which wants to be seen by a user, meeting the requirements of the user and enhancing the satisfaction of the user on the product.
Description
technical field [0001] The invention relates to a projection device, in particular to a method for searching video signals of a projection device and the projection device. Background technique [0002] Projection equipment has been widely used in various industries. Projection equipment may be used in meetings, lectures, product demonstrations, etc. The projection device includes an electronic module and an optical module. The electronic module is used to receive the video signal from the video signal interface, process the video signal, and generate the modulated signal. The optical module is used to output the adjustment signal in the form of optical signal, and project it on the wall or on the screen. [0003] The projection device is generally provided with a plurality of video signal interfaces, such as a video graphics array (D-Sub, commonly known as VGA, Video Graphics Adapter) interface, a SCART interface, a digital video interface (DVI) and the like. Among them...
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Inventor 林泰安
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD