CN203351177U - OLED panel electrical property detection device based on modularization - Google Patents

Abstract

The utility model proposes a modularized OLED panel electrical performance testing device, which includes an upper computer module and a lower computer module, wherein the upper computer module includes a PC and a serial communication module; the lower computer module includes a core control module and a signal output module , a power supply module; the PC is connected with the serial port communication module; the core control module includes a microcontroller control unit, a digital-to-analog conversion unit, an operational amplifier drive unit and a high-low level conversion circuit unit; the signal output module is connected to the The operational amplifier drive unit is connected to the high-low level conversion circuit unit; the power module is respectively connected to the single-chip microcomputer control unit, the digital-to-analog conversion unit, the operational amplifier drive unit and the high-low level conversion circuit unit; the serial port communication module is connected to the The single-chip microcomputer control unit is connected; the digital-to-analog conversion unit is respectively connected with the single-chip microcomputer control unit and the operational amplifier driving unit. The utility model is convenient for the tester to set or change the parameters of the OLED driving waveform through the visual interface of the upper computer, and avoids the trouble that the programmer can only set or change the parameters of the OLED driving waveform by modifying the original code of the program.

Description

Modular OLED panel electrical performance testing equipment

technical field

The utility model relates to a modularized OLED panel electrical performance testing device.

Background technique

OLED, Organic Light-Emitting Diode (Organic Light-Emitting Diode), also known as Organic Electroluminescence Display (OELD), is a new display technology developed since the middle of the 20th century. Compared with liquid crystal displays, OLED has many advantages such as full solid state, active light emission, high brightness, high contrast ratio, ultra-thin, low cost, low power consumption, no viewing angle limitation, and wide operating temperature range. Therefore, some people predict that OLED will be a new generation of display device to replace LCD in the future. However, OLED display technology is a young technology, and the testing equipment, driving IC and other infrastructures for OLED electrical performance testing are not yet perfect. In recent years, as OLED displays are increasingly used to replace LCD displays in mobile phones, electrical performance testing of OLED displays is of great significance for improving product qualification rates and reducing costs.

In the actual production process, due to poor manufacturing process and raw materials, the quality of OLED products cannot reach a 100% pass rate, and there are more or less defects, so OLED panels need to be tested. The detection principle of the utility model is that the tester sets the OLED panel waveform parameters according to the actual situation through the parameter setting interface of the upper computer module (PC) (the tester does not need to know programming), and the parameters are transmitted to the core control module through the serial port communication module. The core control module generates a series of OLED panel driving waveforms after processing, and drives the OLED panel to display images. By detecting the displayed images, it can be judged whether the OLED panel is defective.

In the OLED panel detection equipment in the prior art, to modify the driving waveform parameters of the OLED panel, the programmer needs to modify the original code of the single-chip microcomputer to generate the driving waveform with different parameters. the cost of the enterprise.

Utility model content

The purpose of the utility model is to design an OLED electrical performance testing device based on modularization and visual setting of test parameters in view of the diversification of existing OLED driving waveforms and the troublesome characteristics of existing detectors to change test parameters.

The utility model proposes a modular-based OLED panel electrical performance testing device, which includes an upper computer module and a lower computer module, wherein the upper computer module includes a PC and a serial communication module; the lower computer module includes a core control module and a signal output module , a power module; the PC is connected with the serial communication module; the core control module includes a single-chip control unit, a digital-to-analog conversion unit, an operational amplifier drive unit and a high-low level conversion circuit unit; the signal output module is connected to the The operational amplifier drive unit is connected to the high-low level conversion circuit unit; the power supply module is respectively connected to the single-chip microcomputer control unit, the digital-to-analog conversion unit, the operational amplifier drive unit and the high-low level conversion circuit unit; the serial port communication module is connected to the The single-chip microcomputer control unit is connected; the digital-to-analog conversion unit is respectively connected with the single-chip microcomputer control unit and the operational amplifier driving unit.

In the OLED panel electrical performance testing device as described above, the power module includes a circuit power processing unit, and the circuit power processing unit is respectively connected to the single-chip microcomputer control unit, the digital-to-analog conversion unit, the operational amplifier drive unit and the high-low level conversion circuit unit.

According to the OLED panel electrical performance testing device described above, the circuit power processing unit includes an adjustable power supply part and a non-adjustable power supply part.

According to the above OLED panel electrical performance testing device, the adjustable power supply part and the non-adjustable power supply part are both DC converters.

According to the above OLED panel electrical property testing device, the power module further includes a power interface for connecting to an external power supply.

The above-mentioned OLED panel electrical performance testing device further includes a backlight control module, and the backlight control module is connected to the circuit power processing unit.

The above-mentioned OLED panel electrical performance testing device further includes a keyboard input module connected to the single-chip microcomputer control unit.

In the above-mentioned OLED panel electrical performance testing device, the serial port communication module is a USB interface.

The OLED panel electrical performance testing device of the utility model adopts a modular design scheme so that the circuit is simple but the functions are complete. The waveform parameters can be set or changed directly on the PC, and the modified parameters can be transmitted to the core control module through the serial communication module. The core control module generates corresponding driving waveform parameters after processing, and transmits them to the OLED panel through the signal output module. Detection avoids the trouble of programmers modifying waveform parameters by modifying the original code, improves the detection efficiency of OLED panels, and reduces the detection cost of enterprises. Moreover, the device is small in size and easy to carry. As long as it is connected to a PC, the detection parameters can be changed, and after the parameters are changed, it can be used without the PC.

Description of drawings

Fig. 1 is the schematic diagram of the functional module structure of the embodiment of the electrical property detection equipment of the OLED panel of the present invention;

Fig. 2 is a schematic structural diagram of a physical module of an embodiment of an electrical performance testing device for an OLED panel of the present invention;

Fig. 3 is a schematic diagram of the physical display interface of the embodiment of the device for testing the electrical properties of the OLED panel of the present invention.

Explanation of reference signs:

1-PC; 2-serial communication module; 3-keyboard input module; 4-single-chip control unit;

5-digital-to-analog conversion unit; 6-operational amplifier drive unit; 7-high and low level conversion circuit unit;

8-signal output module; 9-power supply module; 10-adjustable power supply part; 11-non-adjustable power supply part;

12-switch; 13-signal output; 14-keyboard input module; 15-power indicator light;

16-power interface; 17-serial communication interface; 18-PC; 19-backlight control module;

20-parameter display area; 21-other display area; 22-mode selection area;

23-Device name display area; 24-Company name.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the utility model more clear, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described The embodiments are some embodiments of the present utility model, but not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

The main technical scheme of the utility model is that the single-chip microcomputer is set as the core control unit of the lower computer module of the OLED panel electrical performance detection equipment, and parameters can be set through the visual interface of the upper computer module to control the lower computer module to generate corresponding driving waveforms, which is different from the existing Compared with the OLED detection equipment, it is more convenient to set or change the driving waveform parameters, the circuit structure is simpler, the equipment cost is low and the volume is small, and it is easy to carry.

The technical solutions of the present utility model will be described in further detail below with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a functional module structure schematic diagram of an embodiment of an OLED panel electrical performance testing device of the present invention; as shown in Fig. 1 and Fig. 2 , the core control module includes a single-chip microcomputer control unit 4, a digital-to-analog conversion unit 5 and an operational amplifier drive unit 6. Wherein, one end of the digital-to-analog conversion unit 5 is connected to the single-chip microcomputer control unit 4 , and the other end is connected to the operation amplifier driving unit 6 . One end of the serial port communication module 2 is connected to the host computer PC 1, and the other end is connected to the single-chip microcomputer control unit 4; the power supply module 9 is respectively connected to the single-chip microcomputer control unit 4, the digital-to-analog conversion unit 5, the operational amplifier drive unit 6, and the keyboard input module 3. The level conversion circuit unit 7 and the signal output module 8 are respectively connected with the operational amplifier drive unit 6 and the high-low level conversion circuit unit 7 .

Specifically, the power module 9 includes an adjustable power supply part 10 and a non-adjustable power supply part 11 . It can be connected with an external power supply to provide voltage for system operation. The adjustable power supply part 10 and the non-adjustable power supply part 11 can use a high-performance direct current converter (DC-DC chip) to realize multiple output voltages, and the output voltages are respectively input into the single-chip microcomputer control unit 4, the digital-to-analog conversion unit 5, and the operational amplifier drive unit 6. Therefore, the power module 9 may include a power interface 16 and a power indicator light 15 . The indicator light is used to indicate whether the system is powered on.

The single-chip microcomputer control unit 4 is the core control part of the signal generating circuit, and can generate a series of signals through its internal timing counter. The single-chip control unit 4 can program the digital-to-analog conversion unit 5 to output a series of custom waveforms, which are then amplified by the operational amplifier drive unit 6 to drive the OLED panel for display. That is, the single-chip control unit 4 can control the peripheral circuit to adjust the signal, for example, the voltage and frequency of the signal waveform can be programmed and set by the single-chip control unit 4 to meet the requirements of different tested OLED panels. Using the single-chip microcomputer control unit 4 as the core control part not only ensures the stability of functions and signals, but also simplifies the circuit structure, reduces the cost and the size of the equipment.

The digital-to-analog conversion unit 4 adopts AD series high-performance D/C conversion chips to realize 4 analog signal outputs. The output analog signal is amplified by the operational amplifier driving unit 6 to realize the generation of the signal required by the OLED panel to be tested. By adjusting the parameters of the digital-to-analog conversion unit 5 , different output channels can have different output voltages, thereby realizing multi-series signal output. There are four outputs in the operational amplifier driving unit 6 , which output the source signal (that is, the RGB signal) and the Vcom signal required to drive the OLED. Each driving voltage signal mentioned above can be parameterized by the upper computer PC machine 1, and the parameter of setting is transmitted to the single-chip microcomputer control unit 4 by the serial port communication module, and the single-chip microcomputer control unit 4 passes the digital-to-analog conversion unit 5 and high and low after the parameter is processed. The level conversion circuit unit 7 can generate corresponding driving voltage signals.

The utility model OLED panel electrical performance testing device also includes a keyboard input module 3 . The keyboard input module 3 is connected with the single-chip microcomputer control unit 4, so that the system equipment can have the selection functions of switch, next picture, previous picture, and cycle mode. Make a selection.

The upper computer module 1 is connected with the single-chip control unit 4 through the serial port communication module 2, and can output various parameters of the system through the single-chip control unit 4, so that the parameters of the output signal can be displayed through the OLED panel.

The utility model OLED panel electrical performance testing device also includes a serial communication module 2, the interface of which is a USB interface, which can communicate with the upper computer 1 through the data line, and can modify the waveform parameters of the detection signal at any time, so as to drive different OLED panels.

FIG. 2 is a schematic diagram of a physical module structure of an OLED panel electrical performance testing device. Wherein, the power socket 16 is used to connect with an external power supply, and the indicator light 15 is used to indicate whether the system is powered on. The switch 12 is used to control the conduction between the system and the external power supply. In the keyboard input module 14, keys can be used to make the system work in different modes. The serial port communication socket 17 is connected with the PC, and can communicate with the system, so that the system can output user-defined waveforms. The visualization interface of PC 18 can be used to display various parameters. The output module 13 is the output of the signal, which is used to drive the display of the OLED panel.

FIG. 3 is a schematic diagram of a physical display interface of an OLED panel electrical property testing device. It can be seen from the figure that the display interface may include a parameter display area 20 , other display areas 21 , a mode selection area 22 , a device name display area 23 , and a company name 24 . Wherein, the mode selection can be performed through the mode selection area 22 when starting up, corresponding to the keyboard input module 14 . After the mode is selected, information related to the module can be displayed in the parameter display area 20 .

The utility model OLED panel electrical performance testing equipment can directly set or change the waveform parameters on the visual interface of the upper computer, that is, the PC, and transmit the modified parameters to the core control module through the serial port communication module, and the core control module generates corresponding parameters after processing. The driving waveform parameters can be detected by transmitting them to the OLED panel through the signal output module. Enterprise testing costs.

Claims (9)

1. an oled panel electrical property testing device, is characterized in that, comprises upper computer module and slave computer module, and wherein upper computer module comprises PC and serial communication module; The slave computer module comprises kernel control module, signal output module, power module;

Described PC is connected with serial communication module; Described kernel control module comprises Single-chip Controlling unit, D/A conversion unit, operation amplifier driver element and low and high level conversion circuit unit; Described signal output module is connected with the low and high level conversion circuit unit with described operation amplifier driver element; Described power module is connected with described Single-chip Controlling unit, D/A conversion unit, operation amplifier driver element and low and high level conversion circuit unit respectively; Described serial communication module is connected with described Single-chip Controlling unit; Described D/A conversion unit is connected with the operation amplifier driver element with described Single-chip Controlling unit respectively.

2. oled panel electrical property testing device according to claim 1, it is characterized in that, described power module comprises the circuit power processing unit, and described circuit power processing unit connects respectively described Single-chip Controlling unit, D/A conversion unit, operation amplifier driver element and low and high level conversion circuit unit.

3. oled panel electrical property testing device according to claim 2, is characterized in that, described circuit power processing unit is for regulating power supply part and unadjustable power unit.

4. oled panel electrical property testing device according to claim 2, is characterized in that, describedly regulates power supply part and unadjustable power unit is direct current transducer.

5. oled panel electrical property testing device according to claim 2, is characterized in that, described power module also comprises for connecting the power interface of operate outside power supply.

6. oled panel electrical property testing device according to claim 1, is characterized in that, also comprises backlight control module, and described backlight control module is connected with the circuit power processing unit.

7. oled panel electrical property testing device according to claim 1, is characterized in that, also comprises the keyboard load module, and described keyboard load module is connected with described Single-chip Controlling unit.

8. oled panel electrical property testing device according to claim 1, is characterized in that, described upper computer module comprises PC and serial communication module, and described serial communication module is connected with described kernel control module.

9. oled panel electrical property testing device according to claim 8, is characterized in that, described serial communication module is USB interface.

Images