Electrostatic protection structure of liquid crystal display screen

Abstract

The utility model discloses an electrostatic protection structure of a liquid crystal display screen. The electrostatic protection structure comprises a control circuit board, the liquid crystal display screen and an electrostatic protection piece, the control circuit board is provided with a single-chip microcomputer. Pins of the liquid crystal display screen are electrically connected with the single-chip microcomputer. The electrostatic protection part is arranged around the liquid crystal display screen and provided with a circle of conductive shielding layer surrounding the liquid crystal display screen, and the conductive shielding layer of the electrostatic protection part is electrically connected with the ground end of the control circuit board. According to the utility model, the single-chip microcomputer connected with the liquid crystal display screen can be prevented from being damaged by high-voltage static electricity.

Description

Technical Field

[0001] This utility model relates to the field of liquid crystal displays, and in particular to an electrostatic protection structure for liquid crystal displays. Background Technology

[0002] To reduce costs, some manufacturers have developed segment LCD displays that can directly connect to microcontrollers, eliminating the need for an LCD driver circuit and effectively lowering costs. However, during electrostatic discharge testing (level 4, ±15kV), high-voltage static electricity can be directly input to the microcontroller's I / O ports through the LCD pins, potentially damaging the microcontroller and posing a safety hazard.

[0003] In view of the above problems, it is necessary to study an electrostatic protection structure for liquid crystal displays that can protect the microcontroller connected to the liquid crystal display from damage caused by high voltage static electricity. Utility Model Content

[0004] The purpose of this invention is to provide an electrostatic protection structure for a liquid crystal display screen, which can protect the microcontroller connected to the liquid crystal display screen from damage caused by high voltage static electricity.

[0005] To achieve the above objectives, the solution of this utility model is:

[0006] An electrostatic discharge (ESD) protection structure for a liquid crystal display (LCD) screen includes a control circuit board, an LCD screen, and an ESD protection component. The control circuit board is equipped with a microcontroller, and each pin of the LCD screen is electrically connected to the microcontroller. The ESD protection component surrounds the LCD screen and has a conductive shielding layer that surrounds the LCD screen. The conductive shielding layer of the ESD protection component is electrically connected to the ground terminal of the control circuit board.

[0007] The electrostatic protection structure of the liquid crystal display screen also includes a power supply circuit board, which is connected to the control circuit board and their ground terminals are electrically connected.

[0008] The electrostatic protection component is connected to the control circuit board via at least two pin headers or at least two terminals.

[0009] The power circuit board and the control circuit board are arranged at an intersection.

[0010] The electrostatic protection structure for a liquid crystal display screen further includes a housing; a control circuit board and a power circuit board are disposed in the housing, and the liquid crystal display screen and the electrostatic protection component are fitted into the opening of the housing.

[0011] The electrostatic protection structure of the liquid crystal display screen also includes a backlight panel, which is disposed between the liquid crystal display screen and the control circuit board, and the backlight panel is connected to the control circuit board.

[0012] The electrostatic protection structure of the liquid crystal display screen also includes buffer foam sandwiched between the backlight panel and the control circuit board.

[0013] The conductive shielding layer of the electrostatic protection component is a copper layer.

[0014] The electrostatic protection component is sealed to the periphery of the LCD screen.

[0015] The electrostatic protection component uses a PCB board.

[0016] With the above solution, this utility model is equipped with an electrostatic protection component. The electrostatic protection component surrounds the LCD screen and has a conductive shielding layer that surrounds the LCD screen. The conductive shielding layer of the electrostatic protection component is electrically connected to the ground terminal of the control circuit board. The conductive shielding layer can absorb the high-voltage static electricity around the LCD screen and conduct the high-voltage static electricity to the ground terminal of the control circuit board, thereby preventing the high-voltage static electricity from damaging the microcontroller. Attached Figure Description

[0017] Figure 1 Partial structural breakdown of this utility model Figure 1 .

[0018] Figure 2 Partial structural breakdown of this utility model Figure 2 .

[0019] Figure 3 This is a schematic diagram of the structure of this utility model.

[0020] Label Explanation:

[0021] Control circuit board 1,

[0022] LCD screen 2,

[0023] Electrostatic protection component 3, conductive shielding layer 31,

[0024] Power circuit board 4,

[0025] Backlight panel 5,

[0026] 6.0mm cushioning foam

[0027] Outer shell 7,

[0028] Pin header and nut header 8,

[0029] Panel 9. Detailed Implementation

[0030] To further explain the technical solution of this utility model, the following detailed description is provided through specific embodiments.

[0031] like Figures 1 to 3As shown, this utility model discloses an electrostatic discharge (ESD) protection structure for a liquid crystal display (LCD) screen, comprising a control circuit board 1, an LCD screen 2, and an ESD protection component 3. The control circuit board 1 houses a microcontroller, and the pins of the LCD screen 2 are electrically connected to the microcontroller (not shown). The ESD protection component 3 surrounds the LCD screen 2 and has a conductive shielding layer 31 encircling the LCD screen 2. The conductive shielding layer 31 is electrically connected to the ground terminal of the control circuit board 1. This conductive shielding layer 31 absorbs high-voltage static electricity around the LCD screen 2 and directs it to the ground terminal of the control circuit board 1, thereby preventing damage to the microcontroller from high-voltage static electricity. After testing, this utility model passed the air discharge test (±15kV) and contact discharge test (±2kV, ±4kV, ±8kV).

[0032] In an embodiment of this utility model, the electrostatic protection structure for a liquid crystal display screen further includes a power supply circuit board 4. The power supply circuit board 4 is connected to the control circuit board 1, and their ground terminals are electrically connected. The power supply circuit board 4 is used to supply power to the control circuit board 1. The power supply circuit board 4 can be arranged intersecting with the control circuit board 1 to facilitate setting the orientation of the liquid crystal display screen 2.

[0033] In this embodiment of the invention, the electrostatic discharge (ESD) protection component 3 is connected to the control circuit board 1 via at least two pin headers and nuts 8, thus ensuring a stable installation of the ESD protection component 3. It should be noted that the ESD protection component 3 can also be connected to the control circuit board 1 via at least two terminals, which also ensures a stable installation. Furthermore, the ESD protection component 3 can also be connected to the control circuit board 1 via a ribbon cable.

[0034] In embodiments of this invention, the electrostatic discharge protection structure for a liquid crystal display screen may further include a backlight panel 5. The backlight panel 5 is disposed between the liquid crystal display screen 2 and the control circuit board 1, and the backlight panel 5 is connected to the control circuit board 1 via pin headers and nuts. The backlight panel 5 provides backlight to the liquid crystal display screen 2. Furthermore, the electrostatic discharge protection structure for a liquid crystal display screen may further include a buffer foam 6 sandwiched between the backlight panel 5 and the control circuit board 1. The buffer foam 6 provides cushioning to protect the control circuit board 1 and the backlight panel 5, and also provides support for the backlight panel 5.

[0035] In an embodiment of this utility model, the electrostatic protection structure of a liquid crystal display screen may further include a housing 7; a control circuit board 1, a power circuit board 4, a backlight panel 5, and a buffer foam 6 are disposed in the housing 7, while the liquid crystal display screen 2 and the electrostatic protection component 3 are fitted at the opening of the housing 7. The opening of the housing 7 is fitted with a panel 9 that cooperates with the liquid crystal display screen 2 and the electrostatic protection component 3. The panel 9 can cover the electrostatic protection component 3, and the housing 7 can protect the control circuit board 1, the power circuit board 4, and the backlight panel 5.

[0036] In an embodiment of this utility model, the electrostatic protection component 3 and the periphery of the liquid crystal display screen 2 can be sealed together to prevent the leakage of high voltage static electricity due to air in the gap between the electrostatic protection component 3 and the periphery of the liquid crystal display screen 2.

[0037] In the embodiments of this utility model, the electrostatic protection component 3 is made of PCB board, which makes it easier to design the shape of the electrostatic protection component 3 itself and the shape of the conductive shielding layer 31, which can be a copper layer.

[0038] The above embodiments and figures are not intended to limit the product form and style of this utility model. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of this utility model.

Claims

1. An electrostatic protection structure for a liquid crystal display screen, characterized in that: This includes control circuit boards, LCD screens, and electrostatic discharge (ESD) protection components; The control circuit board is equipped with a microcontroller, and the various pins of the LCD screen are electrically connected to the microcontroller. An electrostatic discharge (ESD) protection device surrounds the LCD screen. The ESD protection device has a conductive shielding layer that surrounds the LCD screen and is electrically connected to the ground terminal of the control circuit board.

2. The electrostatic discharge protection structure for a liquid crystal display screen as described in claim 1, characterized in that: It also includes a power supply circuit board, which is connected to the control circuit board and their ground terminals are electrically connected.

3. The electrostatic protection structure for a liquid crystal display screen as described in claim 1 or 2, characterized in that: The electrostatic protection component is connected to the control circuit board via at least two pin headers or at least two terminals.

4. The electrostatic protection structure for a liquid crystal display screen as described in claim 2, characterized in that: The power circuit board and the control circuit board are arranged at an intersection.

5. The electrostatic protection structure for a liquid crystal display screen as described in claim 2, characterized in that: It also includes a housing; the control circuit board and power circuit board are housed in the housing, and the LCD screen and electrostatic protection components are fitted into the opening of the housing.

6. The electrostatic discharge protection structure for a liquid crystal display screen as described in claim 1, 2, or 5, characterized in that: It also includes a backlight panel, which is positioned between the LCD screen and the control circuit board, and the backlight panel is connected to the control circuit board.

7. The electrostatic discharge protection structure for a liquid crystal display screen as described in claim 6, characterized in that: It also includes cushioning foam sandwiched between the backlight panel and the control circuit board.

8. The electrostatic discharge protection structure for a liquid crystal display screen as described in claim 1, characterized in that: The conductive shielding layer of the electrostatic protection component is a copper layer.

9. The electrostatic discharge protection structure for a liquid crystal display screen as described in claim 1, characterized in that: The electrostatic protection component is sealed to the periphery of the LCD screen.

10. The electrostatic discharge protection structure for a liquid crystal display screen as described in claim 1, 8, or 9, characterized in that: The electrostatic protection component uses a PCB board.

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