CN214897558U

CN214897558U - Automatic testing arrangement of LCD screen luminance in a poor light

Info

Publication number: CN214897558U
Application number: CN202120424333.2U
Authority: CN
Inventors: 张伟; 王�华
Original assignee: Anhui Youpu Electronic Technology Co ltd
Current assignee: Anhui Youpu Electronic Technology Co ltd
Priority date: 2021-02-26
Filing date: 2021-02-26
Publication date: 2021-11-26
Anticipated expiration: 2031-02-26

Abstract

The utility model provides an automatic testing device for backlight brightness of a liquid crystal display, which comprises a shell, wherein the shell comprises a bottom shell and a shell; a main board, a power supply board, a transition board, a control board and a test lead are arranged in the shell; the power panel is arranged close to the bottom shell, the transition plate is arranged close to the power panel, the main board is far away from the power panel and is arranged close to the transition plate, and the control panel is arranged close to the transition plate; the test lead is arranged on one side of the shell and is connected with the mainboard, the power panel and the control panel; after the mainboard, the power panel, the transition plate, the control panel and the test lead are integrated, the liquid crystal display is tested, and the detection efficiency of the liquid crystal display can be effectively improved.

Description

Automatic testing arrangement of LCD screen luminance in a poor light

Technical Field

The utility model relates to a LCD screen test field, concretely relates to LCD screen luminance automatic testing arrangement in a poor light.

Background

The liquid crystal screen has the advantages of high display quality, less electromagnetic radiation, small volume, light weight and the like, and is widely applied to various products.

The utility model discloses an inventor discovers, and a lot of LCD screens appear the abnormal scheduling problem of image display after the assembly is accomplished, lead to scrapping or rework and peel off situations such as reassembling again after. In order to improve the yield of the liquid crystal display, it is necessary to test whether the backlight works normally (including whether the backlight can be turned on and whether the brightness can be adjusted) and whether the liquid crystal glass can display images normally (including normal images and normal 5 colors of red, green, blue, white and black) in the assembling process of the liquid crystal display. Therefore, it is necessary to develop an automatic testing device for the backlight brightness of the liquid crystal display.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve above-mentioned problem, provide an automatic testing arrangement of LCD screen luminance in a poor light, through mainboard, power strip, cross cab apron, control panel and test lead wire integration back for test the LCD screen, can effectively improve the detection efficiency of LCD screen.

In order to achieve the purpose, the utility model adopts the following technical scheme.

An automatic testing device for backlight brightness of a liquid crystal display comprises a shell, wherein the shell comprises a bottom shell and a shell; a main board, a power supply board, a transition board, a control board and a test lead are arranged in the shell; the power panel is arranged close to the bottom shell, the transition plate is arranged close to the power panel, the main board is far away from the power panel and is arranged close to the transition plate, and the control panel is arranged close to the transition plate; the test lead is arranged on one side of the shell, and the test lead is connected with the mainboard, the power panel and the control panel.

Furthermore, at least one copper column is arranged between the transition plate and the power panel.

Furthermore, the power panel adopts an all-in-one power panel.

Further, the test lead includes a backlight power supply line, a control board power supply line, and a screen line.

Furthermore, a power socket is arranged on the shell and connected with the power panel.

Further, a nixie tube display component is arranged on the shell and connected with the mainboard.

Further, a function button is arranged on the shell and connected with the control panel.

Furthermore, the shell is provided with three function buttons, including a main function button and two adjusting function buttons.

Further, a USB socket is arranged on the shell and connected with the mainboard.

The utility model relates to a liquid crystal display luminance automatic testing arrangement in a poor light's positive effect is:

the utility model discloses a mainboard, power strip, transition board, control panel and test lead wire are integrated after for test the LCD screen, can effectively improve the detection efficiency of LCD screen.

Drawings

Fig. 1 is a schematic diagram provided by an embodiment of the present invention.

Fig. 2 is a schematic diagram of a housing according to an embodiment of the present invention.

The reference numerals in the figures are respectively:

1. a bottom case; 2. a housing; 3. a main board; 4. a power panel; 5. a transition plate; 6. a control panel; 7. testing a lead; 8. a copper pillar; 9. a power socket; 10. a nixie tube display part; 11. a function button; 12. a USB socket.

Detailed Description

The following detailed description of the present invention is given with reference to the accompanying drawings, but it should be noted that: the described embodiments are not intended to limit the practice of the invention. All adopt the utility model discloses a similar structure and similar change all should go into the utility model discloses a protection scope. The following description of the embodiments refers to the accompanying drawings for illustrating the specific embodiments in which the invention may be practiced. In the embodiments, directional terms such as "up", "down", "front", "back", "left", "right", "top", "bottom", etc. refer to directions of the attached drawings only. Accordingly, the directional terms used are used for describing and understanding the present invention, and are not used for limiting the present invention.

See fig. 1. The automatic testing device for the backlight brightness of the liquid crystal display comprises a shell, wherein the shell comprises a bottom shell 1 and a shell 2; the main board 3, the power panel 4, the transition board 5, the control board 6 and the test lead 7 are arranged in the shell; the power panel 4 is arranged close to the bottom shell 1, the transition plate 5 is arranged close to the power panel 4, the main board 3 is far away from the power panel 4 and is arranged close to the transition plate 5, and the control panel 6 is arranged close to the transition plate 5; the test lead 7 is arranged on one side of the shell, and the test lead 7 is connected with the mainboard 3, the power panel 4 and the control panel 6. The control board 6 uses stm32f103 as a main chip.

The power panel 4 is used for supplying power to the control panel 6 and the main board 3 internally and supplying power (12V) to TCON of the liquid crystal module and supplying power to backlight; the mainboard 3 is used for generating image signals and various test pictures; the control board 6 is used to schedule various functions. A power panel 4 is arranged close to the bottom shell 1, the power panel 4 is fixed on the bottom shell 1 through a copper column 8, and at least one copper column 8 is arranged between the transition plate 5 and the power panel 4. In this embodiment, the number of the copper columns 8 is four, and the specific number of the copper columns 8 is determined according to actual conditions. The height of the copper column 8 is a preset height, the preset height is set according to actual needs, and the copper column 8 is used for fixing the power panel 4 and can also be supported above the power panel 4 by a certain height. A transition plate 5 is arranged at the other end of the copper column 8, the main board 3 is arranged on the transition plate 5, and the control board 6 is arranged on the transition plate 5 or near the transition plate 5. The power panel 4 adopts an all-in-one power panel 4.

The test lead 7 includes a backlight power supply line, a control board power supply line, and a screen line. The backlight power supply line adopts PH2.0-12Pin, an air butt joint female head and is specially matched with a BEKOLL-86 backlight system for use; the TCON power supply line adopts PHB2.0-5Pin, and is specially matched with a BOE system; the Vx1 screen wire adopts a 51pin coaxial wire and an LG format. In this embodiment, the test leads 7 have a length of 1m, and when the target liquid crystal modules are different, the test leads 7 can be replaced for testing other liquid crystal modules.

The shell 2 is provided with a power socket 9, the power socket 9 is a 220V power socket, and the power socket 9 is connected with the power panel 4. In another embodiment, the power socket 9 is not arranged on the housing 2, i.e. the power board 4 is not connected with an external power supply, but a storage battery is arranged on the power board 4.

A nixie tube display part 10 is arranged on the shell 2, and the nixie tube display part 10 is connected with the mainboard 3. The nixie tube display part 10 adopts a 3-bit nixie tube display for displaying the current operation state. The nixie tube display unit 10 performs image update using 500hz as a refresh rate. The nixie tube display part 10 can display characters including: 10 numbers from 0 to 9, F, P letters, -characters, and spaces are not shown, all totaling 14 characters. And designing a character conversion function, and outputting the mentioned display character as an input parameter to be a pin level of hardware.

Be provided with function button 11 on the shell 2, function button 11 with control panel 6 is connected be provided with three function button 11 on the shell 2, including a main function button and two regulatory function buttons. The main function button is named as button F and the two adjustment function buttons are named as button a and button B. The shell 2 is provided with a USB socket 12, the USB socket 12 is connected with the mainboard 3, and the USB socket 12 can be externally connected with a mouse and is used for operating the change of a test picture.

The utility model discloses can realize following function: 1. the function button 11 is pressed to manually adjust and control the backlight brightness, and the specific backlight value is displayed in the nixie tube display part 10. 2. Pressing the panel button allows the tool to automatically poll the backlight, which is repeatedly polled from low to high, aging the backlight. 3. And setting the PWM frequency of the backlight, and performing a temporary test. 4. Pressing the panel button, giving mainboard 3 instruction through the serial ports of control panel 6, letting mainboard 3 send image signal: pure red, green, blue, white, black, vertical bar gray scale, horizontal bar gray scale, black white character. 5. And pressing a panel button, and giving an instruction to the mainboard 3 through the serial port of the control panel 6 for polling a test picture. The above 5 points are referred to as 5 working states, which can be represented by F01/F02/F03/F04/F05.

When the key F is pressed, the current working state is displayed firstly, and then the display of the nixie tube display part 10 is switched repeatedly in the following states: f01, F02, F03, F04 and F05. The key A and the key B are adjusting keys and have different functions according to different states of the function keys. In the state of F01, key a is dimmed and key B is dimmed. In the state of F02, the button a is the start button B and is the stop button. In the state F03, button a is down and button B is up. In the state of F04, the button A is turned forward and the button B is turned backward. In the state F05, button a starts and button B stops.

Claims

1. The automatic testing device for the backlight brightness of the liquid crystal display is characterized by comprising a shell, wherein the shell comprises a bottom shell and an outer shell; a main board, a power supply board, a transition board, a control board and a test lead are arranged in the shell; the power panel is arranged close to the bottom shell, the transition plate is arranged close to the power panel, the main board is far away from the power panel and is arranged close to the transition plate, and the control panel is arranged close to the transition plate; the test lead is arranged on one side of the shell, and the test lead is connected with the mainboard, the power panel and the control panel.

2. The automatic testing device for the backlight brightness of the liquid crystal display screen according to claim 1, wherein at least one copper column is arranged between the transition plate and the power supply plate.

3. The automatic testing device for the backlight brightness of the liquid crystal display according to claim 1, wherein the power board is an all-in-one power board.

4. The automatic testing device for the backlight brightness of the liquid crystal display screen according to claim 1, wherein the testing leads comprise backlight power supply lines, control board power supply lines and screen lines.

5. The automatic testing device for the backlight brightness of the liquid crystal display screen according to claim 1, wherein a power socket is arranged on the housing, and the power socket is connected with the power panel.

6. The automatic testing device for the backlight brightness of the liquid crystal display screen according to claim 1, wherein a nixie tube display component is arranged on the housing, and the nixie tube display component is connected with the main board.

7. The automatic testing device for the backlight brightness of the liquid crystal display screen according to claim 1, wherein a function button is arranged on the casing, and the function button is connected with the control board.

8. The automatic testing device for the backlight brightness of the liquid crystal display screen according to claim 7, wherein the housing is provided with three function buttons, including a main function button and two adjusting function buttons.

9. The automatic testing device for the backlight brightness of the liquid crystal display screen according to claim 1, wherein a USB socket is arranged on the housing, and the USB socket is connected with the main board.