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Inspection system and inspection method

A detection system and detection method technology, which can be used in diode testing, single semiconductor device testing, semiconductor working life testing, etc., and can solve problems such as production process and cost increase

Active Publication Date: 2012-07-04
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, there is no rapid detection method to shorten or even omit the steps and time of the short-term aging test before the LED components leave the factory, resulting in an increase in the production process and cost. Therefore, if a set of online rapid detection mechanism and method can be provided, the design Construct a high-efficiency measurement platform, which will bring significant industrial benefits to the improvement of the quality and reliability of domestic light-emitting diodes

Method used

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Examples

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no. 1 example

[0065] figure 1 It is a schematic diagram of the electrical connection of the detection system of the first embodiment of the present invention, figure 2 for figure 1 The voltage application device and the current detection device shown are the relationship diagrams of the output voltage of the light-emitting element and the measured current versus time, and Figure 3A and Figure 3B respectively to use figure 1 The voltage and current curves of the detection system for detecting the quality of the grains are shown. Please refer to figure 1 , the detection system 100 disclosed in this embodiment can judge the quality of at least one light-emitting element 101 in a short time (for example, within a few minutes), thereby reducing the production cost and time of the product. For example, a 1,000-hour continuous spot test is usually carried out in the way of testing the quality of the grains of light-emitting elements. If the grains can still maintain a certain luminance aft...

no. 2 example

[0087] Figure 5 It is a schematic diagram of the electrical connection of the detection system of the second embodiment of the present invention, Figure 6A for Figure 5 The current application device and the voltage detection device are shown as the relationship between the output current of the light-emitting element and the measured voltage versus time, and Figure 7 for use Figure 5 The voltage and current curves of the detection system for detecting the quality of the grains are shown. Please refer to Figure 5 The detection system 200 disclosed in this embodiment can also judge the quality of the crystal grains of at least one light-emitting element 101 in a short period of time (eg, within a few minutes), thereby reducing production costs and time.

[0088] This embodiment proposes a detection system 200 that can quickly detect the quality of the crystal grains of the light-emitting element 101, which includes a current applying device 210, a voltage detection de...

no. 3 example

[0103] Figure 8 is a schematic diagram of the electrical connection of the detection system of the third embodiment of the present invention, and Figure 9 for use Figure 8 The voltage and current curves of the detection system for detecting the quality of the grains are shown. Please refer to Figure 8 The inspection system 300 disclosed in this embodiment can also judge the quality of the crystal grains of at least one light-emitting element 101 in a short time (for example, within a few minutes), thereby reducing the production cost and time of the product.

[0104] This embodiment proposes a detection system 300 capable of quickly detecting the quality of the crystal grains of the light-emitting element 101 , which includes a pulse current applying device 310 , a voltage detection device 320 and a control unit 330 . The pulse current applying device 310 is electrically connected to the light-emitting element 101 , and applies a pre-detection pulse current and a fast-d...

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Abstract

Provided are an inspection system and an inspection method. The inspection system applies a forward or reverse voltage on a light-emitting device and measures a current thereof respectively before and after temperature rise, and determines whether the device fails according to the fact whether a current difference before and after the temperature rise is larger than a failure current determination value. Alternatively, the inspection system adopts a current applying device to apply a forward and reverse current on a light-emitting device and measures a voltage difference thereof respectively before and after temperature rise, and determines whether the device fails according to the fact whether a difference of the voltage differences before and after the temperature rise is larger than a failure voltage determination value. Alternatively, the inspection system adopts a predetermined inspecting step and a rapid inspecting step respectively to determine whether a light-emitting device fails.

Description

technical field [0001] The invention relates to a detection system and a detection method, and in particular to a detection system and a detection method for detecting the grain quality of a light-emitting element. Background technique [0002] In recent years, the quality and life test methods of light-emitting diodes have become an active topic of international discussion. Among them, the North American Illuminating Engineering Association completed a measurement method for the lumen maintenance of light-emitting diode light sources in September 2008 (Measuring Lumen Maintenance of Light SourcesLM-80-08 ), a set of specifications is proposed for the life test methods of light-emitting diode components, arrays and modules. [0003] According to the specification content, LED life test takes a lot of resources and time. Therefore, manufacturers usually use the basic factory specifications to conduct quality control verification and short-term aging tests to screen premature ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/26
CPCG01R31/2642G01R31/2635
Inventor 王建评杨适存陈宗德李安泽黄胜邦
Owner IND TECH RES INST