CN105652114B - Method of supplying power to, device and measurement jig during a kind of test display screen - Google Patents

Abstract

The embodiment of the invention discloses method of supplying power to, device and the measurement jig during a kind of test display screen.This method includes：After the cable plug of measurement jig inserts the connector interface of display screen, when monitoring to be triggered for display screen power supply event, measurement jig is controlled to export the minimum operating voltage of the display screen, judge whether that the presupposed information in the display screen, and the remaining operating voltage for determining whether to control the measurement jig to export the display screen according to judged result can be read.The embodiment of the present invention is by using above-mentioned technical proposal, when testing display screen, can effectively prevent because measurement jig be connected with display screen it is improper and caused by the display screen situation that is electrically shocked and is damaged occur, save display screen testing cost.

Description

A power supply method, device and test fixture for testing display screens

technical field

The embodiments of the present invention relate to the technical field of display screen testing, and in particular, to a power supply method, device and test fixture for testing a display screen.

Background technique

At present, most electronic products are equipped with display screens, especially mobile terminals such as mobile phones and tablet computers are usually equipped with touch display screens.

The display screen is a relatively expensive component. During the production process of the display screen, the functions of the display screen must be fully inspected. During the full inspection, it is necessary to add all the working voltages required for the normal operation of the display to the display. The specific test steps are: insert the plug of the test fixture cable into the connector interface of the display, press the switch, the test fixture will apply all the working voltage to the display, the display will light up, and then the display function test will be performed. The working voltage of the display screen includes a lower low voltage (such as 1.8V), and also includes a high voltage of more than ten volts, and some can reach more than 20V. Since the display connector interface contains more than a dozen or even dozens of pins, these pins include pins for input voltage and pins for transmitting signals. In the actual test process, there may be test If the plug of the fixture connecting line is inaccurately aligned with the connector interface of the display screen, if the display screen is powered on rashly at this time, it may cause the display screen to be injured by electricity, resulting in damage or scrapping of the display screen.

Contents of the invention

The purpose of the embodiment of the present invention is to provide a power supply method, device and test fixture when testing the display screen, so as to solve the problem of the display screen being damaged by electricity due to improper connection between the test fixture and the display screen when testing the display screen. question.

In the first aspect, an embodiment of the present invention provides a power supply method when testing a display screen, including:

After the connection line plug of the test fixture is inserted into the connector interface of the display screen, when it is detected that the power supply event for the display screen is triggered, the test fixture is controlled to output the minimum operating voltage of the display screen, wherein the connection line The plug includes a power pin and a signal pin, and the connector interface includes a power interface and a signal interface;

Judging whether the preset information in the display screen can be read, and determining whether to control the test fixture to output the remaining working voltage of the display screen according to the judgment result.

In the second aspect, an embodiment of the present invention provides a power supply device for testing a display screen, including:

The minimum working voltage output control module is used to control the test fixture to output the minimum voltage of the display screen when it detects that the power supply event for the display screen is triggered after the connecting wire plug of the test fixture is inserted into the connector interface of the display screen. Working voltage, wherein, the connecting wire plug includes a power pin and a signal pin, and the connector interface includes a power interface and a signal interface;

A judging module, configured to judge whether the preset information in the display screen can be read;

The remaining working voltage output control module is used to determine whether to control the test fixture to output the remaining working voltage of the display screen according to the judgment result of the judging module.

In a third aspect, an embodiment of the present invention provides a display screen test fixture, and the display screen test fixture integrates the power supply device for testing a display screen in the embodiment of the present invention.

In the power supply scheme when testing the display screen provided in the embodiment of the present invention, when the test fixture connection line plug is inserted into the connector interface of the display screen, when it is necessary to supply power to the display screen, first control the minimum output of the display screen by the test fixture. Working voltage, if the alignment between the cable plug and the connector interface is accurate, the display can transmit signals through the signal interface in the connector interface and the test fixture. Therefore, it can be judged whether the preset information in the display can be read Set the information to determine whether the alignment is accurate, and finally determine whether to control the remaining working voltage of the test fixture output display screen according to the judgment result, which can effectively prevent the display from being displayed due to improper connection between the test fixture and the display screen when testing the display screen. The screen is damaged by electric shock, saving the cost of display screen testing.

Description of drawings

FIG. 1 is a schematic flowchart of a power supply method for testing a display screen provided by Embodiment 1 of the present invention;

2 is a schematic flowchart of a power supply method for testing a display screen provided by Embodiment 2 of the present invention;

3 is a schematic flowchart of a preferred power supply method for testing a display screen provided by Embodiment 3 of the present invention;

FIG. 4 is a structural block diagram of a power supply device for testing a display screen according to Embodiment 4 of the present invention.

Detailed ways

The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.

Before discussing the exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although the flowcharts describe the steps as sequential processing, many of the steps may be performed in parallel, concurrently, or simultaneously. Additionally, the order of steps may be rearranged. The process may be terminated when its operations are complete, but may also have additional steps not included in the figure. The processing may correspond to a method, function, procedure, subroutine, subroutine, or the like.

Embodiment one

Figure 1 is a schematic flowchart of a power supply method for testing a display screen provided by Embodiment 1 of the present invention. The method can be executed by a power supply device for testing a display screen, wherein the device can be implemented by software and/or hardware, and generally can be integrated In a test fixture for display testing. As shown in Figure 1, the method includes:

Step 101 , after the connecting wire plug of the test fixture is inserted into the connector interface of the display screen, when it is detected that the power supply event for the display screen is triggered, control the test fixture to output the minimum working voltage of the display screen.

Wherein, the connecting wire plug includes a power pin and a signal pin, and the connector interface includes a power interface and a signal interface.

Exemplarily, the display screen may include a touch display screen of a mobile terminal such as a mobile phone or a tablet computer.

Exemplarily, when testing the display screen, the tester can insert the connecting wire plug of the test fixture into the connector interface of the display screen.

Exemplarily, the detecting that the event of supplying power to the display screen is triggered may specifically be: detecting that the power switch on the test fixture is turned on.

Exemplarily, the minimum working voltage is a voltage for the core of the control chip in the display screen to work normally.

Generally, different types of display screens may require different operating voltages. Taking the touch display screen of a smart phone as an example, the working voltage of the display screen may include 1.8V, 2.8V (or 5V) and 18V, among which 1.8V is the lowest working voltage in this embodiment. When testing, different working voltages can be output by different power pins in the connecting wire plug of the test fixture, wherein, under the condition that the connecting wire plug and the connector interface are aligned accurately, the power pin and the power interface are One-to-one correspondence, signal pins and signal interfaces are also corresponding. If the alignment between the plug of the connecting wire and the interface of the connector is not accurate, the display screen will not be damaged due to the low voltage of 1.8V.

Step 102, judge whether the preset information in the display screen can be read, and determine whether to control the test fixture to output the remaining working voltage of the display screen according to the judgment result. The remaining working voltage refers to other working voltages of the display screen except the minimum working voltage.

Exemplarily, under the condition that the alignment between the plug of the connecting wire and the connector interface is accurate, the minimum working voltage is correctly input into the display screen, and the signal pin and the signal interface are connected correctly, the display screen can be connected to the test fixture through the signal interface. Simple data communication. The preset information may specifically be identification (ID) information built into the display screen, or other information programmed into the display screen in advance, which may be determined by the designer himself. Specifically, the preset information may be stored in a register of a display screen control chip (such as a driver chip). If the test fixture can read the preset information on the display, it means that the alignment between the plug of the cable and the connector interface is accurate. is safe and can then proceed to the normal functional testing process.

In the power supply method for testing the display screen provided by Embodiment 1 of the present invention, when the test fixture connection line plug is inserted into the connector interface of the display screen, and the display screen needs to be powered, the test fixture first controls the minimum output of the display screen. Working voltage, if the alignment between the cable plug and the connector interface is accurate, the display can transmit signals through the signal interface in the connector interface and the test fixture. Therefore, it can be judged whether the preset information in the display can be read Set the information to determine whether the alignment is accurate, and finally determine whether to control the remaining working voltage of the test fixture output display screen according to the judgment result, which can effectively prevent the display from being displayed due to improper connection between the test fixture and the display screen when testing the display screen. The screen is damaged by electric shock, saving the cost of display screen testing.

Embodiment two

Fig. 2 is a schematic flowchart of a power supply method for testing a display screen provided by Embodiment 2 of the present invention. This embodiment is optimized on the basis of the above embodiment. In this embodiment, "judging whether the The preset information in the above display screen is optimized as follows: send a read request to read the preset information in the control chip through the signal pin; match the feedback result of the read request with the standard information stored in the test fixture, If the matching is successful, it is determined that the preset information in the display screen can be read; if the matching is unsuccessful, it is judged that the preset information in the display screen cannot be read.

Correspondingly, the method of this embodiment includes the following steps:

Step 201 , after the connecting wire plug of the test fixture is inserted into the connector interface of the display screen, when it is detected that the power supply event for the display screen is triggered, control the test fixture to output the minimum working voltage of the display screen.

Wherein, the connecting wire plug includes a power pin and a signal pin, the connector interface includes a power interface and a signal interface, and the minimum working voltage is a voltage for the core of the control chip in the display screen to work normally.

Step 202, sending a read request for reading preset information in the control chip through the signal pin.

Exemplarily, the plug of the connecting wire generally includes a plurality of signal pins, and the read request can be sent through the preset signal pins, and the preset signal pins can be specifically determined according to the preset information to be read.

Step 203. Match the feedback result of the read request with the standard information stored in the test fixture. If the matching is successful, perform step 204; if the matching fails, end the process.

Exemplarily, in the case that the alignment between the cable plug and the connector interface is accurate, the feedback result of the read request is the preset information read from the corresponding signal interface, and the preset information will be stored in the test fixture. If the alignment is inaccurate, the feedback result of the read request may be other information read from other uncorresponding signal interfaces (in this case, the power pin pair corresponding to the lowest working voltage may be The bit is correct, but the signal pin alignment is incorrect) or it represents a null value that cannot be read (in this case, the power pin alignment corresponding to the lowest working voltage may be inaccurate, and the core of the control chip cannot work normally, so it cannot be read. It is also possible that the alignment of the power supply pin corresponding to the lowest working voltage is correct, but the alignment of the signal pin is incorrect, and the signal pin cannot communicate with the currently connected signal interface, so the information cannot be read), then the matching is unsuccessful , can end the process, that is, it will not control the test fixture to output the remaining operating voltage of the display screen, so as to prevent the display screen from being damaged by a higher voltage in the remaining operating voltage, and effectively protect the display screen. In addition, because the display screen does not receive the remaining operating voltage, the display screen will not light up. When the tester finds that the display screen does not light up after a period of time, he will find an abnormality, and he can re-plug the test fixture and the display screen. Screen.

Step 204, controlling the test fixture to output the remaining working voltage of the display screen.

In Embodiment 2 of the present invention, after controlling the test fixture to output the minimum working voltage of the display screen, a read request for reading the preset information in the control chip is sent through the signal pin, and according to the feedback result of the read request and the test fixture Whether the standard information stored in the tester matches to determine whether the connection between the test fixture and the display screen is correct can further improve the accuracy of judgment and ensure that the display screen is effectively protected during the test.

Embodiment Three

Fig. 3 is a schematic flowchart of a preferred power supply method for testing display screens provided by Embodiment 3 of the present invention. This embodiment is optimized based on the above embodiments. In this embodiment, "determine whether to Controlling the test fixture to output the remaining operating voltage of the display screen" is optimized as follows: if the judgment result is that the preset information in the display screen can be read, then control the test fixture to output the remaining operating voltage of the display screen; if the judgment result is If the preset information in the display screen cannot be read, the test fixture is controlled to issue a warning.

Specifically, the method of this embodiment includes the following steps:

Step 301 , after the connecting wire plug of the test fixture is inserted into the connector interface of the display screen, and when it is detected that a power supply event for the display screen is triggered, control the test fixture to output the minimum working voltage of the display screen.

Wherein, the connecting wire plug includes a power pin and a signal pin, and the connector interface includes a power interface and a signal interface. Preferably, the power supply pin corresponding to the lowest operating voltage and the signal pin (generally multiple, such as 4) for reading the ID information in the register of the control chip can be set at the center of the entire connecting wire plug, so that The advantage of setting is that it can improve the accuracy of judging whether the test fixture and display screen are connected correctly.

The minimum working voltage is the voltage for the core of the control chip in the display screen to work normally. Specifically, if the alignment is accurate, the registers in the control chip are in a readable state when the display screen obtains the lowest working voltage.

Step 302, try to read the ID information in the register of the control chip through the signal interface of the display screen.

Exemplarily, the ID information in the register of the control chip can be read through a mobile industry processor interface (Mobile Industry Processor Interface, MIPI) protocol.

Step 303 , match the reading result with the standard ID information stored in the test fixture, if the matching is successful, execute step 304 ; if the matching is unsuccessful, execute step 305 .

Exemplarily, the ID information can specifically be a numerical value. The ID information of different types of display screens is different. A list of standard ID information including different types of display screens can be pre-stored in the test fixture, and the read current and test The ID information of the display screen connected to the fixture is compared with the standard ID information list. If it is equal to a certain value in the standard ID information list, it can indicate that the alignment is accurate.

Preferably, before turning on the power switch on the test fixture, the test fixture can first receive the model of the display screen to be tested input or selected by the tester, and determine the current standard ID information according to the model of the display screen to be tested. When the current standard ID information does not match, it is determined that the currently connected display screen does not match the model of the display screen to be tested or the alignment is not accurate, and then step 305 is executed. The advantage of this is that since different types of display screens may require different operating voltages, especially for higher operating voltages, the test fixture will determine the output voltage according to the type of display screen to be tested selected by the tester. If the display model does not match the voltage value of the working voltage, it can further avoid outputting wrong working voltage and causing damage to the display.

Step 304, controlling the test fixture to output the remaining working voltage of the display screen.

Step 305, control the test fixture to stop power supply and issue a warning.

Exemplarily, issuing the warning may specifically be any one or a combination of playing a warning sound, displaying an error picture, and controlling the light of a warning light to remind testers.

The preferred power supply method for testing the display screen provided by Embodiment 3 of the present invention can effectively reduce the damage probability of the display screen caused by production line testing and save the cost of display screen testing.

Embodiment Four

Fig. 4 is a structural block diagram of a power supply device for testing a display screen provided by Embodiment 4 of the present invention. The device can be implemented by software and/or hardware, and can generally be integrated in a test fixture for display screen testing. The power supply method when testing the display screen is used to supply power to the display screen. As shown in FIG. 4 , the device includes: a minimum working voltage output control module 401 , a judging module 402 and a remaining working voltage output control module 403 .

Among them, the minimum working voltage output control module 401 is used to control the test fixture to output the display when it is detected that the power supply event for the display is triggered after the connecting wire plug of the test fixture is inserted into the connector interface of the display screen. The minimum operating voltage of the screen, wherein, the connecting wire plug includes a power pin and a signal pin, and the connector interface includes a power interface and a signal interface; the judging module 402 is used to judge whether the display screen can be read The preset information in: the remaining operating voltage output control module 403, configured to determine whether to control the test fixture to output the remaining operating voltage of the display screen according to the judgment result of the judging module.

In the power supply device for testing the display screen provided by Embodiment 4 of the present invention, when the test fixture connection line plug is inserted into the connector interface of the display screen, and the display screen needs to be powered, the test fixture first controls the minimum output of the display screen. Working voltage, if the alignment between the cable plug and the connector interface is accurate, the display can transmit signals through the signal interface in the connector interface and the test fixture. Therefore, it can be judged whether the preset information in the display can be read Set the information to determine whether the alignment is accurate, and finally determine whether to control the remaining working voltage of the test fixture output display screen according to the judgment result, which can effectively prevent the display from being displayed due to improper connection between the test fixture and the display screen when testing the display screen. The screen is damaged by electric shock, saving the cost of display screen testing.

Based on the above embodiments, the minimum working voltage may be a voltage for the core of the control chip in the display screen to work normally.

On the basis of the above embodiments, the judging module can be specifically configured to: send a read request for reading preset information in the control chip through the signal pin; compare the feedback result of the read request with the The standard information stored in the test fixture is matched, if the matching is successful, it is judged that the preset information in the display screen can be read; if the matching is unsuccessful, it is judged that it cannot be read in the display screen preset information.

On the basis of the above embodiments, the remaining operating voltage output control module can be specifically used to: if the judgment result is that the preset information in the display screen can be read, then control the test fixture to output the display screen remaining working voltage.

On the basis of the above embodiments, the remaining operating voltage output control module can be specifically used to: if the judgment result is that the preset information in the display screen cannot be read, then control the test fixture to stop power supply and issue a warning .

On the basis of the above embodiments, the preset information is the identification information of the display screen.

Embodiment five

An embodiment of the present invention provides a display screen test fixture, which integrates the power supply device for testing a display screen in the embodiment of the present invention.

When using the display screen test fixture provided by the embodiment of the present invention to test the display screen, the test fixture connection line plug can be inserted into the connector interface of the display screen, and the power switch of the test fixture is turned on, and the test fixture will first output The minimum working voltage of the display screen, if it is judged that the alignment between the plug of the connecting wire and the connector interface is accurate, the remaining working voltage of the display screen will be output, which can effectively prevent the test fixture from being improperly connected to the display screen when testing the display screen. As a result, the display screen is damaged by electric shock, which saves the test cost of the display screen.

The power supply device for testing the display screen and the display screen test fixture provided in the above embodiments can implement the power supply method for testing the display screen provided in any embodiment of the present invention, and have corresponding functional modules and beneficial effects for executing the method. For technical details not exhaustively described in the above embodiments, please refer to the power supply method when testing the display screen provided by any embodiment of the present invention.

Note that the above are only preferred embodiments of the present invention and applied technical principles. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and can also include more remaining equivalent embodiments without departing from the concept of the present invention, and the present invention The scope is determined by the scope of the appended claims.

Claims (8)

1. A kind of 1. method of supplying power to during test display screen, it is characterised in that including：

   After the cable plug of measurement jig inserts the connector interface of display screen, monitor as display screen power supply event When being triggered, control measurement jig exports the minimum operating voltage of the display screen, wherein, the cable plug includes power supply Pin and signal pins, the connector interface include power interface and signaling interface；The minimum operating voltage is described in confession The voltage of the kernel normal work of control chip in display screen；

   Presupposed information according to judging whether to read in the display screen judges that the signal pins and the signal connect It is correct whether mouth connects, and determines whether that controlling the measurement jig to export the remaining of the display screen works according to judged result Voltage.
2. 2. according to the method for claim 1, it is characterised in that described to judge whether to read in the display screen Presupposed information, including：

   The read requests for reading the presupposed information in the control chip are sent by the signal pins；

   The feedback result of the read requests is matched with the standard information stored in the measurement jig, if matching into Work(, then it is judged as that the presupposed information in the display screen can be read；If matching is unsuccessful, it is judged as that institute can not be read State the presupposed information in display screen.
3. 3. according to the method for claim 1, it is characterised in that described to be determined whether to control the test according to judged result Tool exports the remaining operating voltage of the display screen, including：

   If judged result is that can read the presupposed information in the display screen, control the measurement jig output described aobvious The remaining operating voltage of display screen.
4. 4. according to the method for claim 1, it is characterised in that described to be determined whether to control the test according to judged result Tool exports the remaining operating voltage of the display screen, including：

   If judged result is that can not read the presupposed information in the display screen, the measurement jig is controlled to stop power supply simultaneously Send warning.
5. 5. according to the method for claim 1, it is characterised in that the presupposed information is believed for the identification of the display screen Breath.
6. A kind of 6. electric supply installation during test display screen, it is characterised in that including：

   Minimum operating voltage output control module, for inserting the connector interface of display screen in the cable plug of measurement jig Afterwards, when monitoring to be triggered for display screen power supply event, control measurement jig exports the minimum work electricity of the display screen Pressure, wherein, the cable plug includes power pins and signal pins, and the connector interface includes power interface and signal Interface；The minimum operating voltage is the voltage for the kernel normal work of the control chip in the display screen；

   Judge module, for judging the signal pins according to the presupposed information for judging whether to read in the display screen Whether connected correctly with the signaling interface；

   Remaining operating voltage output control module, for being determined whether to control the survey according to the judged result of the judge module Try the remaining operating voltage that tool exports the display screen.
7. 7. device according to claim 6, it is characterised in that the judge module is specifically used for：

   The read requests for reading the presupposed information in the control chip are sent by the signal pins；

   The feedback result of the read requests is matched with the standard information stored in the measurement jig, if matching into Work(, then it is judged as that the presupposed information in the display screen can be read；No matching is unsuccessful, then is judged as that institute can not be read State the presupposed information in display screen.
8. 8. a kind of display screen measurement jig, it is characterised in that the display screen measurement jig is integrated with such as the institute of claim 6 or 7 Electric supply installation during the test display screen stated.