CN210984235U

CN210984235U - Liquid crystal display's that two pitch detected short circuit testing arrangement

Info

Publication number: CN210984235U
Application number: CN202020145112.7U
Authority: CN
Inventors: 邢树华
Original assignee: Anshan Yes Optoelectronics Display Co ltd
Current assignee: Anshan Yes Optoelectronics Display Co ltd
Priority date: 2020-01-22
Filing date: 2020-01-22
Publication date: 2020-07-10
Anticipated expiration: 2030-01-22

Abstract

A short circuit testing device of a liquid crystal display screen with double-pitch detection comprises a main control MCU, a testing terminal, an indicator lamp, an alarm and a detection probe, wherein the main control MCU is connected with the testing terminal, the indicator lamp and the alarm through pins, the testing terminal is electrically connected with the detection probe, the detection probe comprises an insulating terminal board and three metal probes fixed on the insulating terminal board, namely a testing probe Test, a first grounding probe and a second grounding probe, the spacing distance between the testing probe Test and the first grounding probe is pitch1, the spacing distance between the testing probe Test and the second grounding probe is pitch2, the pitch1 is larger than that of the pitch2, the testing probe Test is connected to a testing port of the main control MCU through the testing terminal, the testing probe is in contact with a corresponding product electrode through the corresponding pitch probe, whether a short circuit occurs to an adjacent terminal of a tested L CD screen or not is detected, the electronic detection product part can judge the quality of the product, each terminal has two pitches, the number of two products can be detected, the number of the detection terminals is reduced by half, and the testing time and cost are saved.

Description

Liquid crystal display's that two pitch detected short circuit testing arrangement

Technical Field

The utility model relates to an L CD display technical field, in particular to liquid crystal display's short circuit testing arrangement that two pitch detected.

Background

The capacitive touch screen and the L CD screen cannot directly test whether short circuit occurs between adjacent pins of a product after the production of the glass screen is finished, the glass screen can only be assembled into a finished product and then is tested by using a special test stand, after the short circuit product is found, the whole complete finished product is scrapped, and a large amount of cost waste is caused.

There are many types of pitch between the many different model product pins produced by a company. The detection device is used for detecting, and different detection terminals can be replaced according to the pitch of different products. And each detection terminal can detect the products of two types of pitch, and the number of manufactured detection terminals is also reduced by half.

According to the actual requirement of detecting the product characteristics, the functions of a sound alarm part, a light-emitting alarm part and the like are added, and the automatic detection function is realized under the cooperation of other tools.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem that the background art provided, the utility model provides a liquid crystal display's short circuit testing arrangement that two pitch detected, through corresponding interval probe and corresponding product electrode contact, whether the adjacent terminal that is surveyed L CD screen through Test probe detection takes place the short circuit, make the electron detect product part can judge the quality of product, every Test terminal has two kinds of pitch, two kinds of products of detectable, the quantity at preparation detection terminal reduces half, save Test time and cost expense.

A short circuit testing device of a liquid crystal display screen with double pitch detection comprises a main control MCU, a testing terminal, an indicator light, an alarm and a detection probe; the master control MCU is connected with the test terminal, the indicator lamp and the alarm through pins; the test terminal is electrically connected with the detection probe.

The detection probe comprises an insulating terminal board and three metal probes fixed on the insulating terminal board: the testing device comprises a testing probe Test, a first grounding probe and a second grounding probe, wherein the interval distance between the testing probe Test and the first grounding probe is pitch1, the interval distance between the testing probe Test and the second grounding probe is pitch2, the pitch1 is larger than the pitch2, the testing probe Test is connected to a testing port of the master control MCU through a testing terminal, and the first grounding probe and the second grounding probe are both connected with a grounding end of the master control MCU.

Further, the master control MCU is STM32F031G4U 6.

Furthermore, the master control MCU is also connected with an RS485 communication port, and the master control MCU is connected with an upper computer through the RS485 communication port.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model provides a liquid crystal display's of two pitch detections short circuit testing arrangement is the device of the terminal short circuit state that can automatic test electric capacity screen and L CD screen, through corresponding interval probe with correspond the product electrode contact, make the electron detect the product part can judge the quality of product, every terminal has two kinds of pitches, two kinds of products of detectable, the quantity at preparation detection terminal reduces half, saves test time and cost expense.

2. The utility model discloses a Test probe detects whether the short circuit takes place for the adjacent terminal of being surveyed L CD screen, if the short circuit, then sound and pilot lamp warning, can also pass to the host computer in reporting to the police.

Drawings

Fig. 1 is a block diagram of the overall structure of the present invention;

fig. 2 is a front view of the inspection probe of the present invention;

fig. 3 is a top view of the inspection probe of the present invention;

fig. 4 is an electrical design diagram of the present invention.

In the figure: 1-insulated terminal board 2-Test probe Test 3-first ground probe 4-second ground probe 5-electrical connection line.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.

As shown in fig. 1 and 4, the short circuit testing device for the liquid crystal display screen with double pitch detection comprises a main control MCU, a testing terminal, an indicator lamp, an alarm and a detection probe; the main control MCU is connected with the test terminal J0, the indicator light and the alarm through pins; the test terminal is electrically connected with the detection probe. The master control MCU is also connected with an RS485 communication port and is connected with an upper computer through the RS485 communication port.

As shown in fig. 2-3, the detection probe includes an insulating terminal board 1 and three metal probes fixed on the insulating terminal board 1: the testing device comprises a testing probe Test 2, a first grounding probe 3 and a second grounding probe 4, wherein the spacing distance between the testing probe Test 2 and the first grounding probe 3 is pitch1, the spacing distance between the testing probe Test 2 and the second grounding probe 4 is pitch2, the pitch1 is larger than the pitch2, the testing probe Test 2 is connected to a testing port of the master control MCU through a testing terminal J0, and the first grounding probe 3 and the second grounding probe 4 are both connected with a grounding end of the master control MCU. The Test probe Test 2, the first ground probe 3 and the second ground probe 4 are connected to the Test terminal J0 through the electrical connection line 5 and connected to the main control MCU through the Test terminal J0.

So as shown in fig. 4, for the utility model discloses an electrical diagram, in the picture, main control MCU adopts STM32F031G4U6, and among its pin, No. 11 pin is the Test pin, and it connects the Test pin in the J0 terminal to Test 2 through the Test probe of J0 port connection Test probe.

No. 26 pin of the main control MCU is L ED pin and is used for connecting an alarm indicator lamp D1.

And the No. 25 pin of the main control MCU is an SPK pin and is used for connecting a Speaker of the sound alarm.

No. 8 and 9 pins of the main control MCU are TXD and RXD pins, are serial port communication pins of RS485, are connected with an RS485 communication port of J2, and are connected with an external upper computer system through the RS485 communication port.

The

pins

21 and 22 of the main control MCU are programming pins and are connected with a J1 terminal.

The utility model relates to a can automatic Test electric capacity screen and L CD screen's terminal short-circuit state's device, through corresponding interval probe and corresponding product electrode contact, make the electron detect product part can judge the quality of product, every terminal has two kinds of pitch, two kinds of products of detectable, can Test according to two probes (Test probe Test 2 and one of them ground connection probe) in the pitch size selection one of them pitch of examining the product during in-service use.

The function of the sound alarm Speaker is to give a sound prompt lasting for 1 second when the product detection result is a defective product.

The function of the alarm indicator lamp D1 is to give a light flashing signal prompt lasting for 1 second when the product detection result is a defective product.

The above embodiments are implemented on the premise of the technical solution of the present invention, and detailed implementation and specific operation processes are given, but the protection scope of the present invention is not limited to the above embodiments. The methods used in the above examples are conventional methods unless otherwise specified.

Claims

1. A short circuit testing device of a liquid crystal display screen with double pitch detection is characterized by comprising a main control MCU, a testing terminal, an indicator lamp, an alarm and a detection probe; the master control MCU is connected with the test terminal, the indicator lamp and the alarm through pins; the test terminal is electrically connected with the detection probe;

2. The short circuit testing device of the liquid crystal display screen with the double pitch detection function according to claim 1, wherein the main control MCU is STM32F031G4U 6.

3. The device of claim 1, wherein the master control MCU is further connected with an RS485 communication port, and the master control MCU is connected with the upper computer through the RS485 communication port.