Method, equipment and system for detecting display screen without video signal

A video signal and display technology, applied in the field of automatic detection, can solve problems such as wrong detection results, unreliable detection results, unreliable icon detection, etc., to achieve the effect of improving reliability and avoiding unreliability

Inactive Publication Date: 2012-09-26
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, although the icon appears on the screen, but no other image appears on the screen, it will lead to false detection results
Another example is that the detection result is unreliable because

Method used

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  • Method, equipment and system for detecting display screen without video signal
  • Method, equipment and system for detecting display screen without video signal
  • Method, equipment and system for detecting display screen without video signal

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Embodiment Construction

[0025] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same or similar components, although shown in different drawings. For clarity and conciseness, detailed descriptions of known functions and constructions incorporated herein will be omitted since they would otherwise obscure the subject matter of the present invention.

[0026] figure 2 A schematic diagram of a system for identifying no video signal on a display screen according to an embodiment of the present invention is shown.

[0027] Such as figure 2 As shown, the screen 70 is a display screen such as an LCD or other display screens to be tested. The camera 30 captures images on the screen 70 and sends the sequence of captured images to the detection unit 10 . The detection unit 10 is able to process these captured images and detect that there is no video sig...

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Abstract

The invention discloses a method, equipment and a system for detecting a display screen without a video signal. The method comprises the following steps of: capturing an image of the whole screen of a display screen to be detected; calculating a histogram of the captured image; determining an image, of which the histogram meets the preset distribution, as a candidate image; judging whether adjacent candidate images are similar based on the distance between the histograms of the adjacent candidate images; and outputting a signal which shows that a video signal is absent in the display screen under the condition that the number of similar continuous candidate images reaches the preset value. By the scheme, the detection reliability and detection precision can be improved.

Description

technical field [0001] The invention relates to the analysis of the video signal, in particular to the analysis of the video captured by the camera, which is used for the automatic detection of the display device. Background technique [0002] Displays such as LCD displays have their screens tested before leaving the factory to avoid defective products being released to the market. The usual testing methods are visual inspection or manual testing by people. This method of testing is inefficient and can only be tested during working hours, such as during the day. Especially in the case of mass production, a technology for automatically testing display screens that does not rely on manpower is especially needed. [0003] Chinese patent document (notification number: CN201278570Y, announcement date: July 22, 2009) discloses a device for testing and sending a black screen of a wireless digital TV. This patent document proposes a device for identifying a black screen of a wire...

Claims

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Application Information

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IPC IPC(8): H04N17/00H04N17/04H04N7/18
Inventor 李仁杰
Owner SHARP KK
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