CN207780135U - Test suite for detecting display screen - Google Patents

Abstract

The utility model discloses a test assembly for detecting a display screen, comprising: a main board; a test cable, the test cable is suitable for being electrically connected with the display screen; a heat-resistant plug-in control board, the heat-resistant The plug-in control board is electrically connected to the test cable and the main board respectively; a switch, one end of the switch is grounded and the other end is electrically connected to the heat-swappable control board, and the switch is closed to control the display The screen is powered on, and the switch is turned off to control the power off of the display screen. According to the test assembly for testing the display screen of the present invention, the hot-swapping operation is avoided, the test time is saved, the test efficiency is improved, and it also avoids the problem in the related art that the partial power supply of the display screen is not turned off. The burn-in of the screen improves the effective protection of the internal circuit of the display screen, eliminates the risk of failure of the display screen quality, and improves the test yield of the display screen.

Description

Test kits for testing displays

technical field

The utility model relates to the technical field of electronic equipment, in particular to a test assembly for testing display screens.

Background technique

In the production process of the mobile terminal, it is necessary to test the performance of its display screen. Generally, the main board is connected to different display screens through cables to test different display screens. At the same time, the display screen is powered by the main board. During the test of the display screen, the main board is in the power-on state. If one display screen is tested and another screen display is replaced directly, that is, the display screen is replaced by plugging and unplugging the cable with power, it is "hot swapping". This kind of operation may cause electric surge to damage the circuit in the screen and cause screen burn-in, so hot-swapping operation needs to be prevented from happening.

Although, in the test process, the problem of hot plugging can be solved by first cutting off the power supply of the motherboard and then replacing the display screen, but before testing the replaced display screen, the motherboard must be turned on, which leads to a long time during the entire test process. Longer, lower test efficiency.

In the related technology, the method adopted is not to cut off the power supply of the main board during the test process, and when replacing the display screen, only use the lock screen key of the display screen to turn off the display screen before replacing. However, this operation can only turn off the display screen. Part of the power supply of the screen, and some of the power supply cannot be turned off. These power supplies that have not been turned off will still generate electrical surges that will damage the internal circuit of the screen, resulting in fatal damage to the screen.

Utility model content

The utility model aims at at least solving one of the technical problems existing in the prior art. For this reason, the utility model proposes a test assembly for detecting display screens, which can not only improve the test effect, but also prevent screen burn-in of the display screen during the test process.

A test assembly for testing a display screen according to an embodiment of the present invention includes: a main board; a test cable, the test cable is suitable for electrical connection with the display screen; a heat-swappable control board, the heat-resistant The plug-in control board is electrically connected to the test cable and the main board respectively; a switch, one end of the switch is grounded and the other end is electrically connected to the heat-swappable control board, and the switch is closed to control the display The screen is powered on, and the switch is turned off to control the power off of the display screen.

According to the test assembly for testing the display screen according to the embodiment of the present invention, an anti-hot-swappable control board is arranged between the main board and the test cable, and at the same time, the power supply of the main board to the display screen is controlled by the closing of the switch, and the power supply of the display screen is controlled by the closing of the switch. Turn on and control the power-off of the mainboard to the display screen, so that the display screen can be replaced when the main board is turned on, which avoids hot-swapping operations, saves test time, improves test efficiency, and avoids related problems. In the technology, the screen burn-in caused by partial power supply of the display screen is not turned off, which improves the effective protection of the internal circuit of the display screen, eliminates the risk of failure of the display screen quality, and improves the test yield of the display screen.

According to some embodiments of the present invention, the main board has a ground point, and the one end of the switch is connected to the ground point.

According to some embodiments of the present utility model, the anti-hot plug control board includes: a substrate, the substrate is a flexible circuit board; components, and the components are arranged on the substrate.

Specifically, the hot-swappable control board includes: a reinforcement board connected to the base board to support the base board.

Further, the reinforcing plate is a stainless steel plate.

According to some embodiments of the present invention, the hot-swappable control board has an exposed pad, and the other end of the switch is connected to the exposed pad.

Specifically, the other end of the switch is connected to the exposed pad through a first wire.

According to some embodiments of the present invention, the one end of the switch is grounded through the second wire.

According to some embodiments of the present utility model, the switch is integrated on the hot-swap prevention control board.

According to some embodiments of the present utility model, the display screen is a mobile phone display screen.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present utility model will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 is a schematic diagram of connection between a test component and a display screen according to some embodiments of the present invention;

Fig. 2 is the exploded schematic diagram shown in Fig. 1;

Fig. 3 is a circuit schematic diagram between a test component and a display screen according to some embodiments of the present invention;

Fig. 4 is a test flow chart according to some embodiments of the present invention.

Reference signs:

test assembly 100;

Main board 1; Ground point 11;

Test cable 2;

Anti-hot plug control board 3; exposed pad 31; power transmission line 32; signal transmission line 33.

switch 4; first wire 41; second wire 42.

display screen 200 .

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present utility model, but should not be construed as limiting the present utility model.

In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right" and so on is based on the orientation or positional relationship shown in the drawings, It is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

In the description of the present utility model, it should be noted that unless otherwise specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, or Integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.

A test assembly 100 for testing a display screen 200 according to an embodiment of the present invention will be described below with reference to FIGS. 1-3 . The test assembly 100 can be used to test the performance of the display screen 200 . Optionally, the display screen 200 is a mobile phone display screen 200 or a tablet computer display screen 200 or the like.

As shown in FIGS. 1-3 , a test assembly 100 for testing a display screen 200 according to an embodiment of the present invention may include: a main board 1 , a test cable 2 , a hot-swappable control board 3 and a switch 4 .

Specifically, the test cable 2 is suitable for electrical connection with the display screen 200 . For example, the test cable 2 is connected to the display screen 200 through a BTB connection socket.

The hot-swappable control board 3 is electrically connected to the test cable 2 and the main board 1 respectively. That is to say, the main board 1 is electrically connected to the anti-hot-swap control board 3 , and the anti-hot-swap control board 3 is also electrically connected to the test cable 2 at the same time.

One end (for example, the lower end shown in Figures 1 and 3) of the switch 4 is grounded and the other end (for example, the upper end shown in Figures 1 and 3) is electrically connected to the heat-swappable control board 3, and the switch 4 is closed To control the display screen 200 to be powered on, switch 4 is turned off to control the display screen 200 to be powered off.

Generally, the display screen 200 has a backlight power supply, a power supply for controlling LCD liquid crystal flipping, an LCD IC power supply and a touch screen IC power supply. In the related art, the power supply of the mainboard 1 is not cut off during the test, and when the display screen 200 is replaced, the display screen 200 is only extinguished by using the lock screen key of the display screen 200, which can only turn off the backlight power of the display screen 200 and control the LCD liquid crystal. Turn over the power supply, the LCD IC power supply and the touch screen IC power supply of the display screen 200 have not been turned off, therefore, only turn off the backlight power supply of the display screen 200 and control the LCD liquid crystal flip power supply, and do not turn off the LCD IC power supply and the touch screen IC power supply If the replacement of the display screen 200 is performed under such circumstances, these power supplies that have not been turned off will generate electrical surges that will damage the internal circuit IC of the screen, resulting in fatal damage to the screen.

Specifically, as shown in FIG. 3 , according to the test assembly 100 of the embodiment of the present invention, during the test process, the mainboard 1 is always in the power-on state, and at least the power transmission line 32 and the signal transmission line 32 are provided in the anti-hot-plug control board 3. Line 33, when the hot-swappable control board 3 is connected to the main board 1 and the test cable 2 and the test cable 2 is connected to the display screen 200, by closing the switch 4, the main board 1 can transmit power to the display screen 200 as a whole through the power transmission line 32 Power supply, that is to say, when the switch 4 is closed, the motherboard 1 supplies power to the display screen 200, at this time the LCD IC power supply and the touch screen IC power supply of the display screen 200 have been turned on, and when the lock screen key of the display screen 200 is triggered to light When the display screen is 200, at this time, due to the dual action of the power supply of the main board 1 and the lighting of the display screen 200, the backlight power supply of the display screen 200 and the power supply for controlling the flipping of the LCD liquid crystal are turned on, and when the display screen 200 is lit, it is convenient to pass The signal transmission line 33 realizes signal transmission; when the display screen 200 needs to be replaced, it is only necessary to turn off the switch 4 to cut off all the power supplies of the display screen 200 .

Thus, it is not necessary to close the mainboard 1, as long as the power supply of the mainboard 1 to the display screen 200 is controlled by the closing of the switch 4, and the power supply of the mainboard 1 to the display screen 200 is controlled by the opening of the switch 4, so that the mainboard 1 is turned on. In this way, the replacement of the display screen 200 can be realized, which avoids the hot-swapping operation, saves the test time, improves the test efficiency, and also avoids the problem in the related art that the power supply of the display screen 200 is not turned off. The burn-in of the screen improves the effective protection of the internal circuit of the display screen 200, eliminates the risk of failure of the display screen 200 quality, and improves the test yield of the display screen 200.

According to the test assembly 100 for detecting the display screen 200 according to the embodiment of the present invention, the anti-hot-swap control board 3 is arranged between the main board 1 and the test cable 2, and at the same time, the control board 1 is connected to the display screen by closing the switch 4. 200 power supply, through the disconnection of switch 4, control the power-off of main board 1 to display screen 200, so that when main board 1 is turned on, the replacement of display screen 200 can be realized, thus avoiding hot-swapping operation and saving The test time improves the test efficiency, and also avoids the burn-in caused by the partial power supply of the display screen 200 not being turned off in the related technology, improves the effective protection of the internal circuit of the display screen 200, and eliminates the quality of the display screen 200. The failure risk improves the test yield of the display screen 200 .

According to some embodiments of the present utility model, the mainboard 1 has a grounding point 11, and one end (such as the lower end shown in FIG. 1 ) of the switch 4 is connected to the grounding point 11, that is, the switch 4 is connected to the grounding point 11 of the mainboard 1. In order to realize the grounding of the switch 4, the structure is simple, and no additional grounding point is required, which is beneficial to improve the reliability of the switch 4 in use.

Specifically, the anti-hot-swap control board 3 includes: a substrate and components, wherein the substrate is a flexible circuit board, the components are arranged on the substrate, and the components are used to realize power transmission and signal transmission of the anti-hot-swap control board 3 devices etc. Therefore, by setting the substrate as a flexible circuit board, the connection between the hot-swappable control board 3 , the main board 1 and the test cable 2 can be facilitated.

Further, the anti-hot-swap control board 3 also includes a reinforcement board, which is connected to the substrate to support the substrate. Therefore, when the substrate is a flexible circuit board, by setting the reinforcement board, it is not only convenient for the anti-hot-swap control The connection between the board 3 and the main board 1 and the test cable 2 also improves the overall strength of the hot-swappable control board 3 and ensures that the components are not deformed.

Optionally, the reinforcing plate is a stainless steel plate. Therefore, the strength is high and the cost is low. Certainly, the utility model is not limited thereto, and the reinforcement board can also be a board of other materials, as long as it can play a reinforcing role.

In some embodiments of the present invention, as shown in Figures 1 and 2, the hot-swappable control board 3 has an exposed pad 31, and the other end of the switch 4 (for example, the upper end shown in Figure 1) is connected to The exposed pad 31 . Thus, by setting the exposed pad 31 on the heat-swappable control board 3 and connecting the switch 4 to the exposed pad 31, not only the structure is simple, but also the circuit connection between the switch 4 and the heat-swappable control board 3 is convenient. .

Further, as shown in FIGS. 1 and 3 , the other end of the switch 4 (for example, the upper end shown in FIG. 1 ) is connected to the exposed pad 31 through a first wire 41 . Of course, the present invention is not limited thereto. In some other embodiments, the switch 4 can also be directly integrated on the heat-swappable control board 3 , one end of the switch 4 is grounded, and the other end is connected to the exposed pad 31 .

In some embodiments of the present invention, one end of the switch 4 (such as the lower end shown in FIG. 1 ) is grounded through the second wire 42 . For example, one end of the switch 4 is connected to the ground point 11 on the main board 1 through the second wire 42 . Therefore, the structure is simple. Of course, the utility model is not limited thereto. In some other embodiments, the switch 4 can also be integrated on the main board 1 and one end of the switch 4 is directly connected to the grounding point 11 of the main board 1, and the other end of the switch 4 is anti-hot plugging control Board 3 is electrically connected.

The screen changing process and testing process are briefly described below in conjunction with FIG. 4 .

Preparation steps: connect the main board 1, the hot-swappable control board 3 and the test cable 2 in sequence and switch off the switch 4;

Step A—Power on main board 1: Press the power button of the test stand to power on main board 1.

Step B—connect the display screen 200 to be tested to the test cable 2 through the BTB connection socket, during which the switch 4 is turned off.

Step C—testing: the switch 4 is closed and the display screen 200 is turned on, and the display screen 200 is tested.

Step D—Remove the display screen 200: the hot-swappable control board 3 is disconnected through the switch 4 to ensure that the display screen 200 is powered off first, and the connection between the display screen 200 and the test cable 2 is disconnected.

In the description of this specification, references to the terms "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific examples," or "some examples" are intended to mean that the implementation Specific features, structures, materials or characteristics described in an embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions and modifications, the scope of the present invention is defined by the claims and their equivalents.

Claims (10)

1. a kind of test suite for detecting display screen, which is characterized in that including：

Mainboard；

Winding displacement is tested, the test winding displacement is suitable for being electrically connected with the display screen；

Anti- Hot-Swap and Control Interface, the anti-Hot-Swap and Control Interface are electrically connected with the test winding displacement and the mainboard respectively；

Switch, one end ground connection of the switch and the other end are electrically connected with the anti-Hot-Swap and Control Interface, switch closure with It controls the display screen to be powered, the switch is disconnected to be powered off to control the display screen.

2. the test suite according to claim 1 for detecting display screen, which is characterized in that the mainboard has ground connection Described one end of point, the switch is connected to the earth point.

3. the test suite according to claim 1 for detecting display screen, which is characterized in that anti-Hot-Swap and Control Interface packet It includes：

Substrate, the substrate are flexible PCB；

Component, the component are set on the substrate.

4. the test suite according to claim 3 for detecting display screen, which is characterized in that the anti-hot plug control Plate includes：Stiffening plate, the stiffening plate are connected with the substrate to support the substrate.

5. the test suite according to claim 4 for detecting display screen, which is characterized in that the stiffening plate is stainless Steel plate.

6. the test suite according to claim 1 for detecting display screen, which is characterized in that the anti-hot plug control There is plate exposed pad, the other end of the switch to be connected to the exposed pad.

7. according to claim 6 for detecting the test suite of display screen, which is characterized in that the switch it is described another One end is connected to the exposed pad by the first conducting wire.

8. the test suite according to claim 1 for detecting display screen, which is characterized in that described the one of the switch End passes through the second wired earth.

9. the test suite according to claim 1 for detecting display screen, which is characterized in that the switch is integrated in institute It states on anti-Hot-Swap and Control Interface.

10. the test suite for detecting display screen according to any one of claim 1-9, which is characterized in that described Display screen is mobile phone display screen.