LED display panel automatic tester

A technology of display panel and tester, applied in the direction of instruments, static indicators, etc., can solve the problem of high equipment cost and achieve the effect of accurate test

Active Publication Date: 2014-01-08
广东海博威视电子科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has high equipment cost and needs to develop special graphic recognition software for the displayed pattern

Method used

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  • LED display panel automatic tester
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Embodiment Construction

[0012] In order to make the above purpose, features and advantages of the present invention more obvious and easy to understand, the working principle of the LED display panel automatic tester of the present invention will be described in detail below in conjunction with a specific example of automatic testing of the LED front control panel of the 6916H set-top box.

[0013] The 6916H HD set-top box has an LED display panel for displaying 8 "meter" characters, 8 special symbols and 3 colons. The LED display panel of 6916H consists of 8 "meter" characters and 8 special symbols and 3 colons. It is composed of 123 display segments. The display method is a matrix scanning method. Each segment is quickly turned on in turn, using the phenomenon of persistence of human vision to achieve Makes it appear to be a complete display. The scanning matrix is ​​8*14, each group has 14 pulses, a total of 8 groups, and the repetition period is about 150HZ.

[0014] figure 1 It is a complete m...

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Abstract

The invention provides an LED display panel automatic tester which comprises a fiber sensor probe which is formed by that a plurality of fibers are inserted into a module and each fiber is corresponding to an LED display segment, a plurality of photoelectric conversion circuits which are connected with each of the fibers respectively and are used for converting an optical signal sent by each fiber into an electric signal, a plurality of amplification and shaping circuits which are connected with each of the photoelectric conversion circuits and are used for carrying out amplification and shaping on the signal after photoelectric conversion and generating a square wave digital signal, a data interface converting circuit used for acquiring the square wave digital signal of the amplification and shaping circuits and providing the acquired digital signal to a one-chip microcomputer, and the one-chip microcomputer which reads the digital signal provided by a data acquisition interface circuit, generates a display pattern according to the digital signal, and compares whether the generated display pattern is same with a correct display pattern or not, wherein if the generated display pattern is same with the correct display pattern, the one-chip microcomputer outputs an OK indication, and if not, the one-chip microcomputer displays a position of an LED display segment where an error appears.

Description

technical field [0001] The invention belongs to the technical field of instruments and meters, and in particular relates to an automatic tester for LED display panels, which is used for testing LED display panels. Background technique [0002] In the prior art, many electronic products require LED display panels, for example, the 6916H high-definition set-top box, which has an LED display panel for displaying 8 "rice" characters, 8 special symbols and 3 colons. In the production test of the 6916H high-definition set-top box LED display panel, one of the tests is to test whether the LED display is correct. Due to short circuit, open circuit, damage to the display block, and damage to the device caused by the circuit board and welding, the display will be abnormal. Therefore, it is necessary to Check whether the LED display is correct. However, traditional testing methods require testers to keep their eyes on the scrolling display screen and visually display the results. Sin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/00
Inventor 尚德龙
Owner 广东海博威视电子科技股份有限公司
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