Universal backlight debugging and testing equipment

Abstract

The utility model discloses universal backlight debugging and testing equipment, which comprises a computer, a programmed switch power supply and a main control board, the computer is provided with two paths of RS485 interfaces, the programmed switch power supply is an N39420-60-10 type power supply, the programmed switch power supply is provided with four output channels and provides a constant current power supply for backlight testing, and the main control board mainly comprises an MCU (Microprogrammed Control Unit), an EEPROM (Electrically Erasable Programmable Read-Only Memory) and an MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor). According to the utility model, upper computer software of a computer controls output voltage values, output maximum current values and switches of four output channels of the programmable power supply through an RS485 interface, and sets backlight control parameters stored on the main control board and sends backlight adjustment control instructions through another RS485 interface; the main control board controls four paths of output to the backlight to be tested according to backlight parameters stored in the main control board and an adjusting instruction sent by the upper computer, the brightness of the backlight of the liquid crystal screen which is just produced can be debugged and tested, and therefore the display effect of the liquid crystal screen is detected and evaluated.

Description

TECHNICAL FIELD

[0001] The utility model relates to liquid crystal screen test technical field especially relates to a general backlight debugging test equipment. BACKGROUND

[0002] With the continuous progress of liquid crystal display technology, as the core component of the liquid crystal display screen, the performance and stability of the backlight module directly affect the display effect and user experience. However, in the production process of the liquid crystal screen, the newly manufactured liquid crystal screen often has certain uncertainty in performance parameters. In order to comprehensively evaluate and ensure that the display effect of the liquid crystal screen reaches the expected standard, we propose an innovative general backlight debugging test equipment. SUMMARY

[0003] This section aims to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the utility model name to avoid obscuring the purpose of this section, the abstract of the specification and the utility model name. Such simplifications or omissions cannot be used to limit the scope of the utility model.

[0004] Therefore, the utility model aims to provide a general backlight debugging test equipment, which aims to solve the problem that "in the production process of the liquid crystal screen, the newly manufactured liquid crystal screen often has certain uncertainty in performance parameters. In order to comprehensively evaluate and ensure that the display effect of the liquid crystal screen reaches the expected standard".

[0005] To solve the above technical problems, the utility model provides the following technical scheme:

[0006] A general backlight debugging test equipment, comprising: a computer, a programmable switching power supply and a main control board;

[0007] Two RS485 interfaces are arranged on the computer, the programmable switching power supply is N39420-60-10 type power supply, four output channels are arranged on the programmable switching power supply, which provide constant current power supply for backlight test, the main control board mainly consists of MCU, EEPROM and MOSFET, the computer controls the output voltage value and the output maximum current value and the switch of the four output channels of the programmable switching power supply through the RS485 interface, and the computer sets the backlight control parameters saved on the main control board and sends the backlight adjustment control instruction through another RS485 interface.

[0008] As a preferred scheme of the universal backlight debugging test equipment, each of the program-controlled switch power supply output channels has a maximum output voltage value of DC 60V, a maximum output current value of 10A, and a total output power of 200W, and the output voltage and current value of each output channel can be controlled through an RS485 interface.

[0009] As a preferred scheme of the universal backlight debugging test equipment, the EEPROM is used to store backlight parameters, and the MOSFET is used to control the on-off of the backlight driving power supply to adjust the brightness.

[0010] As a preferred scheme of the universal backlight debugging test equipment, the main control board controls four-way output to the backlight to be tested according to the saved backlight parameters and the adjustment instructions sent by the upper computer.

[0011] As a preferred scheme of the universal backlight debugging test equipment, the main control board can generate four kinds of light according to different control instructions, and the light is white light, red light, green light and blue light.

[0012] As a preferred scheme of the use method of the universal backlight debugging test equipment, the method comprises the following specific steps:

[0013] S1: power on, open the upper computer software, configure the serial port, and click to read all parameters of the LCM;

[0014] S2: configure the voltage and current value and related parameters of each channel according to the backlight parameters (voltage value and current value);

[0015] S3: set the brightness value and day-night mode, and click to adjust the brightness;

[0016] S4: cooperate with the brightness meter to measure the current brightness;

[0017] S5: modify the parameters according to the measured value until the design requirements are met.

[0018] The universal backlight debugging test equipment has the following beneficial effects:

[0019] The computer upper computer software controls the output voltage value and output maximum current value of the four-way output channel of the program-controlled power supply and the switch through an RS485 interface, sets the backlight control parameters saved on the main control board and sends the backlight adjustment control instructions through another RS485 interface, the main control board controls four-way output to the backlight to be tested according to the saved backlight parameters and the adjustment instructions sent by the upper computer, and the debugging and testing of the backlight brightness of the just produced liquid crystal screen can be realized, so that the display effect of the liquid crystal screen can be detected and evaluated. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings. Among them:

[0021] Figure 1 The control principle block diagram of the universal backlight debugging test equipment is provided for the present application;

[0022] Figure 2 The main control board principle diagram of the universal backlight debugging test equipment is provided for the present application;

[0023] Figure 3 The host computer interface diagram of the universal backlight debugging test equipment is provided for the present application;

[0024] Figure 4 The working flow chart of the universal backlight debugging test equipment is provided for the present application. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned purpose, features and advantages of the present application more apparent and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings of the specification.

[0026] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present application, therefore the present application is not limited by the specific embodiments disclosed below.

[0027] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. In this specification, "in one embodiment" does not mean the same embodiment, nor is it an independent or alternative embodiment that excludes other embodiments.

[0028] Thirdly, the present application is described in detail in conjunction with the schematic diagram, and in order to facilitate the description, the sectional view of the device structure will be partially enlarged without the general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the present application. In addition, the three-dimensional spatial dimensions of length, width and depth should be included in actual manufacture.

[0029] Reference Figures 1-4The utility model provides a kind of general backlight debugging test equipment, comprising: computer, program-controlled switching power supply and main control panel;

[0030] Two-way RS485 interface is provided on the computer, the program-controlled switching power supply is N39420-60-10 type power supply, four output channels are provided on the program-controlled switching power supply, constant-current power supply is provided for backlight test, and the main control panel is mainly composed of MCU, EEPROM, MOSFET, the computer controls the output voltage value and output maximum current value and switch of the four-way output channel of program-controlled switching power supply through RS485 interface, and the computer sets the backlight control parameter saved on the main control panel and sends backlight adjustment control instruction through another RS485 interface.

[0031] The maximum output voltage value of each program-controlled switching power supply output channel is DC 60V, the maximum output maximum current value is 10A, and the output total power is 200W, and the output voltage and current value of each output channel can be controlled through RS485 interface.

[0032] Further, the EEPROM is used to store backlight parameters, and the MOSFET is used to control the on-off of backlight driving power supply for brightness adjustment.

[0033] Further, the main control panel controls four-way output to the backlight to be measured according to the backlight parameters saved by itself and the adjustment instruction sent by the upper computer.

[0034] Further, the main control panel can generate four kinds of light according to different control instructions, and the light is white light, red light, green light and blue light respectively.

[0035] The utility model further provides a kind of using method of general backlight debugging test equipment, comprising the following specific steps:

[0036] S1: power on, open upper computer software, configure serial port, click to read all parameters of LCM;

[0037] S2: according to backlight parameter (voltage value and current value), configure each channel voltage and current value and related parameters;

[0038] S3: set brightness value and day-night mode, click brightness adjustment;

[0039] S4: cooperate with brightness meter to measure current brightness;

[0040] S5: modify parameters according to measurement value until it meets design requirement.

[0041] The computer host software controls the output voltage value and the output maximum current value and the switch of the four-way output channel of the program-controlled power supply through the RS485 interface, and sets the backlight control parameters saved on the main control board and sends the backlight adjustment control instruction through another RS485 interface, and the main control board controls the four-way output to the backlight under test according to the saved backlight parameters and the adjustment instruction sent from the host computer, so that the debugging and testing of the just-produced liquid crystal screen backlight brightness can be performed, thereby the display effect of the liquid crystal screen is detected and evaluated.

[0042] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limited. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A universal backlight debug test apparatus, characterized by: Include: Computer, programmable switching power supply and main control board; Two-way RS485 interface is arranged on the computer, the programmable switching power supply is N39420-60-10 type power supply, four output channels are arranged on the programmable switching power supply, constant current power supply is provided for backlight test, the main control board is mainly composed of MCU, EEPROM, MOSFET, the computer controls the output voltage value and output maximum current value and switch of the four-way output channel of the programmable switching power supply through the RS485 interface, the computer sets the backlight control parameters saved on the main control board and sends the backlight adjustment control instruction through another RS485 interface.

2. The universal backlight debug test device of claim 1, wherein: The output maximum voltage value of each output channel of the programmable switching power supply is DC 60V, the maximum output maximum current value is 10A, and the output total power is 200W, the output voltage and current value of each output channel can be controlled through the RS485 interface.

3. A universal backlight debug test apparatus according to claim 2, wherein: The EEPROM is used to store the backlight parameters, and the MOSFET is used to control the on-off of the backlight drive power supply to adjust the brightness.

4. A universal backlight debug test apparatus according to claim 3, wherein: The main control board controls the four-way output to the backlight to be tested according to the backlight parameters saved by itself and the adjustment instruction sent by the upper computer.

5. A universal backlight debug test apparatus according to claim 4, wherein: The main control board can generate four kinds of light according to different control instructions, and the light is white light, red light, green light and blue light respectively.

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