Device for detecting unlighted LED lamps in LED lamp array

A technology of LED lamp and detection device, applied in the direction of measurement device, measurement of electricity, measurement of electric variables, etc., can solve the problem of low detection efficiency of lack of light LED lamp, so as to improve the speed of detection, eliminate the problem of missed detection, and reduce production costs Effect

Inactive Publication Date: 2013-01-02
SHANGHAI CHENXING ELECTRONICS SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the defect of low detection efficiency of lack of LED lamps in LED lamp arrays in the prior art, and provide a device for detecting lack of brightness of LED lamp arrays, which detects the LED lamps in sequentially lit LED lamp arrays. Whether each LED light emits light to determine whether there is a lack of light in the LED light array

Method used

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  • Device for detecting unlighted LED lamps in LED lamp array
  • Device for detecting unlighted LED lamps in LED lamp array

Examples

Experimental program
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no. 1 example

[0017] Such as figure 1 The LED light array lack of brightness detection device shown includes an LED light array display module 1 , a photoelectric sensor 2 , a voltage comparison module 3 , a counting module 4 and a display screen 5 .

[0018] The LED light array display module 1 is used to turn on each LED light in the LED light array to be tested sequentially. And described LED lamp array display module 1 is provided with an interval time T, described LED lamp array display module 1 intervals described interval time T between lighting each LED lamp, thus makes described photoelectric sensor 2 have sufficient The response time and the photoelectric sensor 2 have a stronger ability to resist interference from external light sources.

[0019] The LED light array display module 1 in this embodiment may use MCU (micro control) or FPGA (programmable logic array) to control the lighting of each LED light in the LED light array to be tested. In addition, the LED light array disp...

no. 2 example

[0034] The difference between this implementation and the first embodiment is:

[0035] In this embodiment, a sealed cavity 6 is also included, the sealed cavity 6 is light-tight, and as figure 2 As shown, the photoelectric sensor 2 is arranged in the sealed cavity 6, and the sealed cavity 6 is also used for setting the LED light array to be tested.

[0036] Through the sealed cavity 6, the interference of light generated by other light sources in the external environment can be further shielded from the LED lamp array to be tested, thereby reducing the interference electrical signal in the photoelectric sensor 2 and improving the comparison result of the voltage comparison module 3 correctness.

[0037] In addition, a reflective layer 7 is also provided in the sealed cavity 6 in this embodiment, such as figure 2 The reflective layer 7 shown in FIG. 2 is located on the inner wall of the sealed cavity 6 , and the reflective layer 7 completely covers the inner wall of the se...

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Abstract

The invention discloses a device for detecting unlighted LED lamps in an LED lamp array. The device comprises an LED lamp array controlling unit, a photoelectric converting unit, a comparing unit, and a counting unit, wherein the LED lamp array controlling unit is used for sequentially lighting up every LED lamp in the LED lamp array, the photoelectric converting unit is used for converting light signals emitted by the LED lamp array into electrical signals, the comparing unit is preset with threshold voltage and used for comparing voltage of the electrical signals with the threshold voltage, and the counting unit is used for counting number of the received counted electrical signals. The comparing unit is used for comparing the voltage of the electrical signals converted by the photoelectric converting unit with the threshold voltage, if the voltage of the electrical signals converted by the photoelectric converting unit is larger than the threshold voltage, a counting electrical signal is provided to the counting unit by the comparing unit. The device for detecting the unlighted LED lamps in the LED lamp array is capable of automatically completing detection of the unlighted LED lamps in the LED lamp array, detection is accelerated, producing efficiency is improved, and producing cost is reduced.

Description

technical field [0001] The invention relates to a detection device for lack of brightness of an LED lamp array, in particular to a detection device for detecting a lack of brightness of an LED lamp array with side-lit LED lamps. Background technique [0002] LED (Light Emitting Diode) arrays have been used on a large scale in existing mobile products to display pattern numbers, and as the complexity of the patterns to be displayed increases, the number of LEDs in the LED dot matrix used in the patterns used in the display arrays is increasing. , often as many as 100 or more, and because the displayed pattern is irregular, the arrangement pattern of the LED array is also often irregular. Therefore, only relying on artificial vision to inspect the lack of bright LEDs in the irregular LED array has very low efficiency, and there is a large risk of bad leakage. [0003] In addition, a large number of side-lit LED lights in the LED light array also greatly enhance the difficulty...

Claims

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Application Information

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IPC IPC(8): G01R31/27
Inventor黄训刚
OwnerSHANGHAI CHENXING ELECTRONICS SCI & TECH CO LTD