CN107909952A - Method and fixture for testing display screen - Google Patents

Abstract

The embodiment of the invention discloses a method and a jig for detecting a display screen, which are used for efficiently and accurately detecting the recessive defect of the display screen. The method comprises the following steps: the driving signal source is connected with a pin of the display screen to be detected and provides a preset driving signal for the display screen to be detected; the electric parameter detection equipment detects the electric parameters on the pins when the driving signal source provides preset driving signals for the display screen to be detected through connecting the pins of the display screen to be detected or connecting the driving signal source and the pins of the display screen to be detected; the electrical parameter detection equipment displays the electrical parameters to detection personnel so that the detection personnel can judge whether the display screen to be detected is bad according to the preset threshold value and the electrical parameters. According to the technical scheme provided by the invention, on one hand, whether the display screen to be detected is bad can be objectively determined; on the other hand, no matter the duration of the input of the driving signal, the electrical parameters can be detected instantly, so that the recessive defect of the display screen can be detected efficiently and accurately.

Description

Method and fixture for testing display screen

technical field

The invention relates to the field of display screen manufacturing, in particular to a method and fixture for testing a display screen.

Background technique

The display screen is an important component of many electronic devices, especially some smart devices, and its display screen is responsible for the interface function of human-computer interaction. For example, for a smart terminal such as a smart phone with a touch screen, the user interacts with the smart phone by touching the touch screen.

In order to ensure the quality, before the display screen is finally loaded into smart terminals such as smartphones or mass-produced, it will go through a test program to detect defects. An existing method for detecting defective display screens is to use a lighting fixture to input a driving signal to the display screen to light up the display screen, and then inspectors visually (or through other tools) observe the screen display of the display screen to determine whether it is defective. For example, observe whether each pixel in the screen displays a preset color. If the color displayed by each pixel is consistent with or close to the preset color, then it is judged that the display screen is qualified. Pixels with large color differences are judged to be abnormal and belong to unqualified products.

However, the above-mentioned existing detection methods cannot detect some hidden defects of the display screen. This is because, even if the strength of the driving signal exceeds the normal value, the picture display may not only be normal, but also may not damage the display screen itself. However, the detection The duration of the input driving signal is generally short (for example, 1 minute), but in normal use, the duration of the driving signal will be much longer than the duration of the detection, and the driving signal whose strength exceeds the normal value will directly cause the display damage to the screen.

Contents of the invention

Embodiments of the present invention provide a method and fixture for detecting display screens, so as to efficiently and accurately detect hidden defects of display screens.

In order to achieve the above object, the first aspect of the embodiment of the present invention provides a method for detecting a display screen, the method comprising:

The driving signal source provides a preset driving signal for the display screen to be detected by being connected to the pins of the display screen to be detected;

The electrical parameter detection device detects that the drive signal source provides a preset for the display screen to be detected by connecting the pins of the display screen to be detected or by connecting the drive signal source and the pins of the display screen to be detected. electrical parameters on said pin when driving a signal;

The electrical parameter detection device displays the electrical parameters to inspectors, so that the inspectors can judge whether the display screen to be inspected is defective according to a preset threshold value and the electrical parameters, and the preset threshold value is the driving signal The normal range of the electrical parameter measured on the pin when the source provides the preset driving signal to the display screen to be tested.

With reference to the first aspect of the embodiments of the present invention, in the first implementation manner of the first aspect, the drive signal source provides a preset drive signal for the display screen to be tested by connecting to a pin of the display screen to be tested, It includes: the driving signal source is connected to the pin of the display screen to be detected through one end and the other end is grounded, so as to provide a fixed voltage for the display screen to be detected as a first driving signal;

The electrical parameter detection device detects the voltage on the pin when the drive signal source provides a preset drive signal for the display screen to be detected by connecting the drive signal source and the pin of the display screen to be detected. Parameters, including: the electrical parameter detection device is connected to the drive signal source through one end, and the other end is connected to the pin of the display screen to be detected, and the drive signal source is detected to provide the first The current value on the pin when the signal is driven.

With reference to the first implementation manner of the first aspect of the embodiments of the present invention, in the second implementation manner of the first aspect, if the display screen to be detected exists, the driving signal source is required to provide a preview to the display screen to be detected. Assuming that the normal range of the electrical parameters measured during the driving signal is the same as pin 1 to pin n, then the electrical parameter detection device is connected to the driving signal source through one end, and the other end is connected to the pin of the display screen to be detected, Detecting the current value on the pin when the driving signal source provides the first driving signal for the display screen to be detected includes: the electrical parameter detection device is connected to the driving signal source through one end, and the other end is connected to the driving signal source. The pin 1 to pin n of the display screen to be tested in series is connected, and the pin 1 to pin n is detected when the driving signal source provides the first drive signal for the display screen to be tested. The current value, said n is a natural number greater than or equal to 2.

In combination with the first aspect of the embodiments of the present invention, in the third implementation manner of the first aspect, the drive signal source provides a preset drive signal for the display screen to be tested by connecting to a pin of the display screen to be tested, It includes: the drive signal source is connected to the pins of the display screen to be detected, and provides a fixed current for the display screen to be detected as a second drive signal;

The electrical parameter detection device detects the electrical parameters on the pins when the driving signal source provides a preset driving signal for the display screen to be detected by connecting the pins of the display screen to be detected, including: the The electrical parameter detection device connects one end to the pin and the other end to ground, and detects the voltage value on the pin when the driving signal source provides the second driving signal for the display screen to be tested.

With reference to the third implementation manner of the first aspect of the embodiments of the present invention, in the fourth implementation manner of the first aspect, if the display screen to be detected exists, the driving signal source is required to provide a preview to the display screen to be detected. Assuming that the normal range of the electrical parameters measured during the drive signal is the same as pin 1 to pin m, then the electrical parameter detection device is connected to the pin through one end and the other end is grounded, and detects that the drive signal source is the Detecting the voltage value on the pin when the display screen provides the second drive signal includes: the electrical parameter detection device is connected to the pin 1 to pin m in parallel through one end, and the other end is grounded to detect When the driving signal source provides the second driving signal for the display screen to be detected, the voltage values on the pins 1 to 1 m are a natural number greater than or equal to 2.

In combination with the first aspect of the embodiments of the present invention, the first, second, third or fourth implementation manner of the first aspect, in the fifth implementation manner of the first aspect, the method further includes: if When the electrical parameter detection device detects that the display screen to be detected is defective, the alarm device sends out an abnormal alarm.

In order to achieve the above object, the second aspect of the embodiment of the present invention provides a fixture for testing a display screen, the fixture includes a driving signal source, an electrical parameter detection device, and a fixing frame for fixing the display screen to be tested;

The driving signal source is used to provide a preset driving signal for the display screen to be detected by connecting with the pins of the display screen to be detected;

The electrical parameter detection device is used to detect that the driving signal source is the to-be-tested display screen by connecting the pins of the to-be-tested display screen or by connecting the drive signal source and the pins of the to-be-tested display screen The electrical parameters on the pins when the display screen provides a preset driving signal;

The electrical parameter detection device is also used to display the electrical parameters to the inspectors, so that the inspectors can judge whether the display screen to be inspected is defective according to a preset threshold value and the electrical parameters, and the preset threshold value is The normal range of the electrical parameter measured on the pin when the drive signal source provides the preset drive signal to the display screen to be tested.

With reference to the second aspect of the embodiments of the present invention, in the first implementation manner of the second aspect, the driving signal source is specifically configured to connect one end to the pin of the display screen to be detected and the other end to be grounded, which is the The display screen to be detected provides a fixed voltage as the first driving signal;

The electrical parameter detection device is specifically used to connect one end to the drive signal source and the other end to a pin of the display screen to be detected, and detect the drive signal source to provide the first driving signal for the display screen to be detected. signal at the current value on the pin.

With reference to the first implementation manner of the second aspect of the embodiment of the present invention, in the second implementation manner of the second aspect, if the display screen to be detected exists, the drive signal source is required to provide a preview to the display screen to be detected. Assuming that the normal range of the electrical parameters measured during the drive signal is the same as pin 1 to pin n, the electrical parameter detection device is specifically used to connect the drive signal source through one end, and connect the other end to the to-be-detected The pin 1 of the display screen is connected to the pin n, and the current value on the pin 1 to pin n when the drive signal source provides the first drive signal for the display screen to be detected is detected, and the n is a natural number greater than or equal to 2.

In combination with the second aspect of the embodiments of the present invention, in the third implementation manner of the second aspect, the driving signal source is specifically configured to provide a fixed size for the display screen to be tested by connecting with pins of the display screen to be tested. The current is used as the second driving signal;

The electrical parameter detection device is specifically used to connect one end to the pin and the other end to ground, and detect the voltage value on the pin when the drive signal source provides the second drive signal for the display screen to be tested. .

With reference to the third implementation manner of the second aspect, in the fourth implementation manner of the second aspect, if the display screen to be tested exists and the drive signal source is required to provide a preset drive signal to the display screen to be tested If the measured electrical parameters have the same normal range from pin 1 to pin m, the electrical parameter detection device is specifically used to connect one end to the pin 1 to pin m after parallel connection, and the other end is grounded to detect When the driving signal source provides the second driving signal for the display screen to be detected, the voltage values on the pins 1 to 1 m are a natural number greater than or equal to 2.

In combination with the second aspect of the embodiment of the present invention, the first, second, third or fourth implementation manner of the second aspect, in the fifth implementation manner of the second aspect, the jig further includes:

An alarm device connected to the electrical parameter detection device is configured to issue an abnormal alarm if the electrical parameter detection device detects that the display screen to be detected is defective.

It can be seen from the technical solutions provided by the above-mentioned embodiments of the present invention that, on the one hand, since the electrical parameters and the preset thresholds obtained by the electrical parameter detection equipment are all numerical values that can be expressed quantitatively, it is different from the existing detection methods that only rely on detection Compared with whether personnel observe the picture of the display screen to judge whether the display screen to be detected is defective, the technical solution provided by the invention can more objectively determine whether the display screen to be detected is defective; When the signal source provides a preset drive signal for the display screen to be detected, the electrical parameters on the pins of the display screen to be detected can be detected instantly regardless of the duration of the drive signal input. When the electrical parameters do not match the preset threshold It means that the display screen to be detected is defective, so the hidden defect of the display screen can be detected efficiently and accurately.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without creative work.

FIG. 1 is a flowchart of a method for detecting a display screen provided by an embodiment of the present invention;

Fig. 2 is a flowchart of a method for detecting a display screen provided by another embodiment of the present invention;

FIG. 3 is a flowchart of a method for detecting a display screen provided by another embodiment of the present invention;

Fig. 4 is a schematic diagram of the structure and connection of the fixture for detecting the display screen provided by the embodiment of the present invention;

Fig. 5 is a schematic diagram of the structure and connection of a fixture for detecting a display screen provided by another embodiment of the present invention;

Fig. 6 is a schematic diagram of the structure and connection of a fixture for detecting a display screen provided by another embodiment of the present invention;

Fig. 7-a is a schematic diagram of the structure and connection of the fixture for detecting the display screen provided by another embodiment of the present invention;

Fig. 7-b is a schematic diagram of the structure and connection of the fixture for detecting the display screen provided by another embodiment of the present invention;

Fig. 7-c is a schematic diagram of the structure and connection of a fixture for testing a display screen provided by another embodiment of the present invention.

Detailed ways

In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.

Figure 1 shows a method for detecting a display screen, which mainly includes the following steps S101 to S103, detailed as follows:

S101, the driving signal source is connected to the pins of the display screen to provide a preset driving signal for the display screen to be detected.

In the embodiment of the present invention, the driving signal source may be a power supply, which can provide a certain amount of voltage or current as a driving signal for the display screen to be tested, and the preset driving signal means that the magnitude of the driving signal is preset.

S102. The electrical parameter detection device connects the pins of the display screen to be detected or connects the drive signal source and the pins of the display screen to be detected, and detects that the drive signal source provides a preset drive signal for the display screen to be detected. Electrical parameters on the feet.

Corresponding to the embodiment in which the driving signal source can be a power supply, which can provide a certain amount of voltage or current as a driving signal for the display screen to be tested, in the embodiment of the present invention, the electrical parameter detection device can be a voltmeter, for example, a voltmeter , can also be a current meter, such as an ammeter, or an integrated device of a voltmeter and an ammeter, such as a voltammeter.

S103, the electrical parameter detection device displays the electrical parameters detected in step S102 to the inspectors, so that the inspectors can judge whether the display screen to be inspected is defective according to the preset threshold and the electrical parameters.

In the embodiment of the present invention, the preset threshold is the normal range of the power-on parameters of the pins of the display screen to be detected when the drive signal source provides a preset drive signal to the display screen to be detected, that is, the drive signal source provides a preset value to the display screen to be detected. When the driving signal and the picture displayed on the display screen are normal, the range value of the electrical parameter measured on the pins of the display screen to be detected is set. For example, when the power supply provides a voltage of 0.55V to the display screen to be tested, the screen displayed on the screen to be tested is normal, but the current measured on the pins of the screen to be tested is 90μA~110μA, then 90μA~110μA is the preset threshold. It should be noted that the preset threshold can be a statistical value obtained by detecting the same pin for different display screens to be detected. The screen provides a preset driving signal, and when the screen displayed on the screen is normal, the current measured on pin 1 of the screen is 90μA~110μA, and the preset threshold of pin 1 is 90μA~110μA.

The inspector sees the electrical parameter detected by the electrical parameter detection device and compares the preset threshold with the electrical parameter. If the parameter is within the range of the preset threshold, it is judged that the display screen to be tested is qualified; otherwise, Judging that the display screen to be tested is defective.

It can be seen from the method for detecting the display screen illustrated in the accompanying drawing 1 that, on the one hand, since the electrical parameters and the preset threshold values obtained by the electrical parameter detection equipment are all numerical values that can be expressed quantitatively, it is only different from the existing detection methods. Compared with judging whether the display screen to be tested is defective by relying on the inspector to observe whether the screen of the display screen is normal, the technical solution provided by the present invention can more objectively determine whether the display screen to be detected is defective; on the other hand, the technical solution provided by the present invention is Detect the electrical parameters on the pins of the display screen to be detected when the source of the drive signal provides the preset drive signal for the display screen to be detected. Regardless of the duration of the drive signal input, the electrical parameters can be detected instantly. When the electrical parameters are consistent with the preset When the threshold value does not match, it means that the display screen to be detected is defective, so the hidden defect of the display screen can be detected efficiently and accurately.

Please refer to accompanying drawing 2, which is a method for detecting a display screen provided by another embodiment of the present invention, which mainly includes the following steps S201 to S203, and is described in detail as follows:

S201. The driving signal source is connected to a pin of the display screen to be detected through one end and grounded at the other end, so as to provide a fixed voltage as a first driving signal for the display screen to be detected.

For example, if the driving signal source is a DC power supply, its positive pole can be connected to the pin of the display screen to be tested, and its negative pole can be grounded to provide a fixed voltage for the display screen to be tested as the first driving signal. It should be noted that, in the above embodiment, the positive pole of the DC power supply may not be directly connected to the pin of the display screen to be tested, but a device with negligible resistance, such as an ammeter, may be separated in between.

S202. Connect one end of the electrical parameter detection device to the driving signal source and the other end to the pin of the display screen to be detected, and detect the current value on the pin when the driving signal source provides the first driving signal for the display screen to be detected.

For example, for the embodiment of the above step S201, when the electrical parameter detection device is an ammeter, one end of the ammeter can be connected to the driving signal source, such as the positive pole of a DC power supply, and the other end can be connected to the pin of the display screen to be tested, that is, the current The meter is connected in series between the driving signal source and the pin of the display screen to be tested. At this time, the anode of the driving signal source is not directly connected to the pin of the display screen to be tested.

In order to save resources and improve detection efficiency, in the embodiment of the present invention, if there is a display screen to be detected that requires the drive signal source to provide a preset drive signal to the display screen to be detected, the measured electrical parameters have the same normal range as pin 1 to pin pin n, the above step S201 may be: the electrical parameter detection device is connected to the driving signal source through one end, and the other end is connected to the pin 1 to pin n of the display screen to be detected after being connected in series, and the detection driving signal source is the display screen to be detected The current value on pin 1 to pin n when the first driving signal is provided is shown in FIG. 5 , wherein n is a natural number greater than or equal to 2. For example, if the pin 1, pin 2, pin 3 and pin 4 of the display screen to be tested, the normal range of the current measured when the driving signal source is required to provide a voltage of 0.55V to the screen to be tested is the same, for example, Both are 90μA～110μA, then you can connect pin 1, pin 2, pin 3 and pin 4 of the display screen to be tested in series, and then, the electrical parameter detection equipment, for example, one end of the ammeter is connected to the driving signal source, The other end is connected to the pin 1, pin 2, pin 3 and pin 4 connected in series, and the current value on the pin 1 to pin n when the detection drive signal source provides the first drive signal for the display screen to be tested, In this way, there is no need for four electrical parameter detection devices. Of course, when pin 1, pin 2, pin 3 and pin 4 are connected to the driving signal source, such as a DC voltage source, they can be connected in parallel Then it is connected with the DC voltage source, so that there is no need for 4 DC voltage sources but only one DC voltage source as the driving signal source.

S203, the electrical parameter detection device displays the electrical parameter detected in step S202 to the inspector, so that the inspector can judge whether the display screen to be inspected is defective according to the preset threshold value and the electrical parameter.

The implementation scheme of step S203 is the same as the implementation scheme of step S103 in the foregoing embodiment, and its process, terminology and concepts can refer to the description of the foregoing embodiment, and will not be repeated here.

Please refer to accompanying drawing 3, which is a method for detecting a display screen provided by another embodiment of the present invention, mainly including the following steps S301 to S303, detailed as follows:

S301. The driving signal source is connected to the pins of the display screen to be detected, and provides a fixed current for the display screen to be detected as a second driving signal.

In order to save resources and improve detection efficiency, in the embodiment of the present invention, if there is a display screen to be detected that requires the drive signal source to provide a preset drive signal to the display screen to be detected, the measured electrical parameters have the same normal range as pin 1 to pin pin m, the realization of the above step S301 may be: the electrical parameter detection device is connected to the parallel connected pin 1 to pin m through one end, and the other end is grounded, and when the detection drive signal source provides the second drive signal for the display screen to be tested The voltage value on the pin 1 to the pin m is shown in Fig. 6, wherein, m is a natural number greater than or equal to 2. For example, if the pin 1, pin 3, pin 5, pin 6 and pin 9 of the display screen to be tested, the normal range of the voltage measured when the driving signal source is required to provide a current of 100μA to the display screen to be tested is the same , for example, are all 0.5V ~ 0.6V, you can connect the pin 1, pin 3, pin 5, pin 6 and pin 9 of the display screen to be tested in parallel, and then, the electrical parameter detection equipment, for example, The positive pole of the voltmeter is connected to the parallel connected pin 1, pin 3, pin 5, pin 6 and pin 9, and the negative pole is grounded. The voltage value on pin m, in this way, there is no need for 5 voltmeters, of course, at this time, pin 1, pin 3, pin 5, pin 6 and pin 9 are connected to the driving signal source, such as a DC power supply , they can be connected in series and then connected to the driving signal source, so that there is no need for five DC power supplies but only one DC power supply as the driving signal source.

S302. The electrical parameter detection device connects one end to the pin and the other end to ground, and detects the voltage value on the pin when the driving signal source provides the second driving signal for the display screen to be detected.

For example, the electrical parameter detection device at this time may be a voltmeter.

S303, the electrical parameter detection device displays the electrical parameter detected in step S302 to the inspector, so that the inspector can judge whether the display screen to be inspected is defective according to the preset threshold value and the electrical parameter.

The implementation scheme of step S303 is the same as the implementation scheme of step S103 or step S203 in the foregoing embodiments, and its process, terminology and concepts can refer to the descriptions of the foregoing embodiments, and will not be repeated here.

Because inspectors stare at the electrical parameter detection equipment for a long time to watch the electrical parameters detected by them, they are prone to fatigue, resulting in errors or reduced efficiency. In the embodiment of the present invention described in any one of the accompanying drawings 1 to 3, an alarm device can also be connected to the electrical parameter detection device. If the electrical parameter detection device detects that the display screen to be detected is defective, the alarm device will send out an abnormal alarm. For example, if the electrical parameter detection device detects that the electrical parameter on the pin of the display screen to be detected does not match the preset threshold value, for example, it is not within the preset threshold value range, the alarm device will issue an abnormal alarm. The specific alarm method can be in the form of sound, For example, a sharp alarm can be issued, which can also be in the form of light emission, for example, the indicator light emits red light, and the present invention can not limit the specific way of the alarm device to issue an abnormal alarm.

Please refer to FIG. 4 , which is a jig for testing a display screen provided by an embodiment of the present invention. For ease of description, only parts related to the embodiments of the present invention are shown. The fixture for detecting the display screen provided in FIG. 4 mainly includes a driving signal source 401, an electrical parameter detection device 402, and a fixing frame (not shown) for fixing the display screen to be tested. The details are as follows:

The driving signal source 401 is used to provide a preset driving signal for the display screen to be detected by connecting with the pins of the display screen to be detected;

The electrical parameter detection device 402 is used to detect when the drive signal source 401 provides a preset drive signal for the display screen to be detected by connecting the pins of the display screen to be detected or by connecting the drive signal source 401 and the pins of the display screen to be detected. Electrical parameters on the feet;

The electrical parameter detection device 402 is also used to display the electrical parameters on the pins detected by the electrical parameter detection device 402 when the drive signal source 401 provides a preset drive signal for the display screen to be tested, so that the tester can use the preset threshold and the electrical parameters to determine whether the display screen to be tested is defective, wherein the preset threshold is the normal range of the electrical parameters measured on the pins of the display screen to be tested when the drive signal source provides a preset driving signal to the display screen to be tested.

It should be noted that, since the device provided by the embodiment of the present invention is based on the same concept as the method embodiment of the present invention, the technical effect it brings is the same as that of the method embodiment of the present invention. For details, please refer to the description in the method embodiment of the present invention , which will not be repeated here.

Optionally, the driving signal source 401 shown in the example of FIG. 4 above is specifically used to provide a fixed voltage as the first driving signal for the display screen to be detected by connecting one end to a pin of the display screen to be detected and grounding the other end. In this case, the electrical parameter detection device 402 is specifically used to connect one end to the drive signal source 401 and the other end to a pin of the display screen to be detected, and to detect when the drive signal source 401 provides the first drive signal for the display screen to be detected. current value on the pin.

Optionally, if the display screen to be tested has pins 1 to 1 that require the drive signal source to provide a preset drive signal to the display screen to be tested, the normal range of the measured electrical parameters is the same, then the above-mentioned embodiment mentions The electrical parameter detection device 402 is used to connect the driving signal source 401 through one end, and connect the pin of the display screen to be detected through the other end, and detect the pin of the display screen to be detected when the driving signal source 401 provides the first driving signal for the display screen to be detected The current value above can specifically be: the electrical parameter detection device 402 is specifically used to connect the driving signal source 401 through one end, and connect the other end to the pin 1 to pin n of the display screen to be detected after being connected in series, and the detection driving signal source 401 is The connection schematic diagram of the current value on pin 1 to pin n when the display screen to be detected provides the first driving signal is shown in Figure 5, wherein n is a natural number greater than or equal to 2.

Optionally, the driving signal source 401 in the example of the above-mentioned accompanying drawing 4 is specifically used to provide a fixed current as the second driving signal for the display screen to be detected by connecting to the pins of the display screen to be detected, and the electrical parameter detection device 402 is specifically It is used to connect one end to the pin of the display screen to be tested and the other end to be grounded to detect the voltage value on the pin of the display screen to be tested when the driving signal source 401 provides the second drive signal for the display screen to be tested.

Optionally, if the display screen to be tested has pins 1 to 1 that have the same normal range of electrical parameters measured when the drive signal source is required to provide a preset drive signal to the display screen to be tested, then the electrical parameters mentioned in the above-mentioned embodiments The parameter detection device 402 is specifically used to connect one end to the pin of the display screen to be detected, and the other end to be grounded, and detect the voltage value on the pin of the display screen to be detected when the drive signal source 401 provides the second drive signal for the display screen to be detected. Yes: the electrical parameter detection device 402 is specifically used to connect the pin 1 to the pin m of the display screen to be tested in parallel through one end, and the other end is grounded, and the detection drive signal source 401 provides the second drive for the display screen to be tested. The voltage value on the pin 1 to the pin m during the signal, and its connection schematic diagram is shown in Figure 6, wherein, m is a natural number greater than or equal to 2.

The fixture for detecting the display screen in any example of the above-mentioned accompanying drawings 4 to 6 may also include an alarm device 701 connected to the electrical parameter detection device 402, as shown in the accompanying drawings 7-a to 7-c, the implementation of the present invention The fixture for testing the display screen provided by the example. The alarm device 701 is used to issue an abnormal alarm if the electrical parameter detection device 402 detects that the display screen to be detected is defective.

In the several embodiments provided in this application, it should be understood that the disclosed jig and method can be implemented in other ways. For example, the fixture embodiments described above are only illustrative. For example, the division of the modules is only a logical function division. In actual implementation, there may be other division methods. For example, multiple modules or components can be combined Or it can be integrated into another system, or some features can be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of fixtures or modules may be in electrical, mechanical or other forms.

The modules described as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical modules, that is, they may be located in one place, or may be distributed to multiple network modules. Part or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional module in each embodiment of the present invention may be integrated into one processing module, each module may exist separately physically, or two or more modules may be integrated into one module. The above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules.

If the integrated modules are realized in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk, and other media that can store program codes.

It should be noted that, for the sake of simplicity of description, the aforementioned method embodiments are expressed as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the described action sequence. Because of the present invention, certain steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification belong to preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

In the foregoing embodiments, the descriptions of each embodiment have their own emphases, and for parts not described in detail in a certain embodiment, reference may be made to relevant descriptions of other embodiments.

The above is the description of the method and fixture for detecting the display screen provided by the present invention. For those skilled in the art, according to the idea of the embodiment of the present invention, there will be changes in the specific implementation and application range. In summary , the contents of this specification should not be construed as limiting the present invention.

Claims (12)

1. A kind of 1. method for detecting display screen, it is characterised in that the described method includes：

   Source driving signal provides default driving letter by being connected with the pin of display screen to be detected, for the display screen to be detected Number；

   Electrical parameters detection equipment is by connecting the pin of the display screen to be detected or by connecting the source driving signal and institute The pin of display screen to be detected is stated, the source driving signal is detected and provides default drive signal when institute for the display screen to be detected State the electrical parameter on pin；

   The electrical parameters detection equipment shows the electrical parameter to testing staff so that the testing staff according to predetermined threshold value and The electrical parameter judges whether the display screen to be detected is bad, and the predetermined threshold value is the source driving signal to described to be checked Survey the normal range (NR) of the electrical parameter measured when display screen provides the default drive signal on the pin.
2. 2. the method for detection display screen as claimed in claim 1, it is characterised in that the source driving signal with to be detected by showing The pin connection of display screen, default drive signal is provided for the display screen to be detected, including：The source driving signal passes through one end It is connected with the pin of the display screen to be detected and the other end is grounded, the electricity of fixed size is provided for the display screen to be detected Pressure is used as the first drive signal；

   The electrical parameters detection equipment is by connecting the pin of the source driving signal and the display screen to be detected, described in detection Electrical parameter when source driving signal provides default drive signal for the display screen to be detected on the pin, including：The electricity Parameter detection equipment connects the source driving signal by one end, and the other end connects the pin of the display screen to be detected, detection The current value when source driving signal provides first drive signal for the display screen to be detected on the pin.
3. 3. the method for detection display screen as claimed in claim 2, it is characterised in that if the display screen to be detected, which exists, requires institute State when source driving signal provides default drive signal to the display screen to be detected that measured electrical parameter normal range (NR) is identical to draw Foot 1 connects the source driving signal to pin n, then the electrical parameters detection equipment by one end, and other end connection is described to be checked The pin of display screen is surveyed, is detected described in when the source driving signal provides first drive signal for the display screen to be detected Current value on pin, including：The electrical parameters detection equipment connects the source driving signal by one end, and the other end is with connecting The pin 1 of the display screen to be detected afterwards detects the source driving signal and is carried for the display screen to be detected to pin n connections Current value during for first drive signal on the pin 1 to pin n, the n are the natural number more than or equal to 2.
4. 4. the method for detection display screen as claimed in claim 1, it is characterised in that the source driving signal with to be detected by showing The pin connection of display screen, default drive signal is provided for the display screen to be detected, including：The source driving signal passes through with treating The pin connection of display screen is detected, the electric current of fixed size is provided as the second drive signal for the display screen to be detected；

   For the electrical parameters detection equipment by connecting the pin of the display screen to be detected, it is described to detect the source driving signal Electrical parameter when display screen to be detected provides default drive signal on the pin, including：The electrical parameters detection equipment passes through One end connects the pin, and other end ground connection, detects the source driving signal and provide described second for the display screen to be detected Magnitude of voltage during drive signal on the pin.
5. 5. the method for detection display screen as claimed in claim 4, it is characterised in that if the display screen to be detected, which exists, requires institute State when source driving signal provides default drive signal to the display screen to be detected that measured electrical parameter normal range (NR) is identical to draw Foot 1 connects the pin to pin m, then the electrical parameters detection equipment by one end, and other end ground connection, detects the driving letter Magnitude of voltage when number source provides second drive signal for the display screen to be detected on the pin, including：The electricity ginseng Number detection device is connected by one end with the pin 1 after parallel connection to pin m, and other end ground connection, detects the drive signal Magnitude of voltage when source provides second drive signal for the display screen to be detected on the pin 1 to pin m, the m are Natural number more than or equal to 2.
6. 6. the method for display screen is detected as described in claim 1 to 5 any one, it is characterised in that the method further includes：If The electrical parameters detection equipment detects that the display screen to be detected is bad, then warning device sends abnormality alarm.
7. 7. it is a kind of detect display screen gauge, it is characterised in that the gauge include source driving signal, electrical parameters detection equipment and For fixing the fixed frame of display screen to be detected；

   The source driving signal, for by being connected with the pin of the display screen to be detected, being carried for the display screen to be detected For presetting drive signal；

   The electrical parameters detection equipment, for by connecting the pin of the display screen to be detected or being believed by connecting the driving Number source and the pin of the display screen to be detected, detect the source driving signal and provide default driving for the display screen to be detected Electrical parameter during signal on the pin；

   The electrical parameters detection equipment, is additionally operable to show the electrical parameter to testing staff, so that the testing staff is according to pre- If threshold value and the electrical parameter judge whether the display screen to be detected bad, the predetermined threshold value for the source driving signal to The normal range (NR) of the electrical parameter measured when the display screen to be detected provides the default drive signal on the pin.
8. 8. the gauge of detection display screen as claimed in claim 7, it is characterised in that the source driving signal is specifically used for passing through one End is connected with the pin of the display screen to be detected and other end ground connection, and fixed size is provided for the display screen to be detected Voltage is as the first drive signal；

   The electrical parameters detection equipment is specifically used for connecting the source driving signal by one end, and other end connection is described to be detected The pin of display screen, detects and draws described in when the source driving signal provides first drive signal for the display screen to be detected Current value on foot.
9. 9. the gauge of detection display screen as claimed in claim 8, it is characterised in that if the display screen to be detected, which exists, requires institute State when source driving signal provides default drive signal to the display screen to be detected that measured electrical parameter normal range (NR) is identical to draw Foot 1 is specifically used for connecting the source driving signal by one end to pin n, then the electrical parameters detection equipment, and the other end is with going here and there For the pin 1 of the display screen to be detected after connection to pin n connections, it is the display screen to be detected to detect the source driving signal The current value on the pin 1 to pin n during first drive signal is provided, the n is the natural number more than or equal to 2.
10. 10. the gauge of detection display screen as claimed in claim 7, it is characterised in that the source driving signal is specifically used for passing through It is connected with the pin of display screen to be detected, the electric current of fixed size is provided as the second driving letter for the display screen to be detected Number；

    The electrical parameters detection equipment is specifically used for connecting the pin by one end, and other end ground connection, detects the driving letter Magnitude of voltage when number source provides second drive signal for the display screen to be detected on the pin.
11. 11. the gauge of detection display screen as claimed in claim 10, it is characterised in that required if the display screen to be detected exists It is identical that the source driving signal provides measured electrical parameter normal range (NR) when presetting drive signal to the display screen to be detected Pin 1 to pin m, then the electrical parameters detection equipment be specifically used for by one end with it is in parallel after the pin 1 to pin m companies Connect, other end ground connection, detects described in when the source driving signal provides second drive signal for the display screen to be detected Magnitude of voltage on pin 1 to pin m, the m are the natural number more than or equal to 2.
12. 12. the gauge of display screen is detected as described in claim 1 to 5 any one, it is characterised in that the gauge further includes：

    The warning device being connected with the electrical parameters detection equipment, if being detected for the electrical parameters detection equipment described to be checked It is bad to survey display screen, then sends abnormality alarm.