Liquid crystal screen lighting electrostatic protection device

Abstract

The utility model discloses a liquid crystal screen lighting electrostatic protection device, which comprises a substrate, a baffle plate for positioning a product is arranged on the substrate, an electromagnetic component is arranged on the substrate, and when the electromagnetic component is not electrified, an electromagnet on the electromagnetic component is ejected out and positioned on the baffle plate; when the electromagnetic assembly is powered on, the electromagnet on the electromagnetic assembly is attracted by the electromagnetic coil to retract and break away from the baffle. And the baffle is clamped by the electromagnet to prevent fool, so that hot plug is effectively prevented, and the problem of hot plug during detection operation by personnel is avoided.

Description

Technical Field

[0001] The utility model belongs to the field of liquid crystal display panel production assistance and relates to a liquid crystal screen lighting static electricity protection device. Background Art

[0002] With the rise of LCD screens, the LCD panel (abbreviated as: panel) incoming lighting inspection jigs have also developed. Since employees often lift the pressure head without turning off the power, this is hot plugging. The static electricity residue caused by hot plugging will affect the judgment of product quality. At the least, it will cause static electricity accumulation, and at the worst, it will cause panel burns. When it is made into a module, it will also affect the search for the best VCOM, and ultimately fail to meet customer requirements.

[0003] In order to solve the above problems, a cylinder is currently used to achieve the lifting and lowering of the pressure head to avoid hot plugging. However, the above structure is relatively expensive, and the pressure head and the polarizer baffle are designed separately. There is also the possibility that the pressure head is lifted without turning off the power, and the panel will accumulate static electricity during live operation. At the same time, if the panel fails to light up due to misalignment for the first time, the staff has the opportunity to lift the baffle and move the panel, which may easily cause scratches on the CT pad.

[0004] Therefore, it is necessary to improve the prior art to overcome the defects in the prior art. Utility Model Content

[0005] The utility model aims to provide a liquid crystal screen lighting electrostatic protection device to solve the problem of hot plugging during detection by personnel.

[0006] The purpose of the utility model is achieved through the following technical solutions:

[0007] A liquid crystal screen lighting electrostatic protection device comprises a substrate, a baffle for positioning a product is provided on the substrate, an electromagnetic assembly is provided on the substrate, when the electromagnetic assembly is not powered on, the electromagnet on the electromagnetic assembly is pushed out and positioned on the baffle; when the electromagnetic assembly is powered on, the electromagnet on the electromagnetic assembly is attracted by the electromagnetic coil, retracts and detaches from the baffle.

[0008] When the personnel place the panel and the baffle with the polarizer is pressed down to make the probe contact the panel, when the product starts to be powered on for testing, the electromagnet pops out and jams the baffle to prevent the personnel from lifting the baffle and the probe without turning off the power during the inspection process.

[0009] Further, the electromagnetic assembly includes a shell, the shell has an electromagnetic cavity and a reset cavity, the electromagnetic cavity is provided with an electromagnetic coil connected to an external wire, and the electromagnetic coil is provided with an electromagnet; the shell has a channel through which the power supply magnet passes axially; the electromagnet is provided with a block, and the block is located in the reset cavity; the electromagnet is provided with a spring, one end of the spring abuts against the block, and the other end of the spring abuts against the inner wall of the reset cavity.

[0010] Furthermore, a positioning hole for inserting the power supply magnet is provided on the side of the baffle.

[0011] Furthermore, when the electromagnet is ejected, it is located above the baffle, and the lower edge of the electromagnet contacts the upper end surface of the baffle.

[0012] Furthermore, one side of the baffle is hinged on a hinge seat, and the hinge seat is fixed on the base plate.

[0013] Furthermore, the electromagnetic coil is connected to a power control board, and the power control board has a 51 single-chip microcomputer and a power chip for controlling the on and off of the electromagnetic coil.

[0014] The above technical solution has the following beneficial effects: the baffle is clamped by an electromagnet to prevent fooling, effectively prevent hot plugging, and avoid hot plugging problems when personnel operate during detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0016] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0017] Figure 1 This is a structural schematic diagram provided by the utility model.

[0018] Figure 2 This is a schematic diagram of the structure of the electromagnetic assembly provided by the utility model when it is not powered.

[0019] Figure 3 This is a schematic diagram of the structure of the electromagnetic component provided by the utility model when it is energized.

[0020] Figure 4 The utility model provides a circuit diagram.

[0021] In the figure: 1-substrate; 2-baffle; 3-electromagnetic assembly; 31-housing; 301-reset chamber; 302-electromagnetic chamber; 32-electromagnet; 33-block; 34-spring; 35-electromagnetic coil; 4-hinge seat; 5-product; 6-51 single chip microcomputer. DETAILED DESCRIPTION

[0022] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these implementation methods is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each implementation method of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0023] Example

[0024] See also Figure 1-Figure 4 As shown, a device for protecting against electrostatic discharge when lighting a liquid crystal screen comprises a substrate 1, on which a baffle 2 for positioning a product 5 is provided. The baffle 2 is pressed onto the product 1 in the form of a flip cover. Specifically, a pair of hinge seats 4 are provided on the substrate 1, and protrusions are provided at both ends of one side of the baffle 2. The protrusions can be hinged on the hinge seats 4, so that the baffle 2 can flip and move. An electromagnetic assembly 3 is provided on the substrate 1, and the electromagnetic assembly 3 comprises a shell 31, and the shell 31 has an electromagnetic cavity 302 and a reset cavity 301, and the electromagnetic cavity 302 is provided with an electromagnetic coil 35 connected to an external wire, and the electromagnetic coil 35 is provided with an electromagnet 32; the shell 31 has a channel through which the power supply magnet 32 ​​passes axially. A stopper 33 is provided on the electromagnet 32, and the diameter of the stopper 33 is larger than the diameter of the channel, thereby limiting the range of axial movement of the electromagnet 32. The stopper 33 is located in the reset chamber 301 . A spring 34 is disposed on the electromagnet 32 ​​. One end of the spring 34 abuts against the stopper 33 , and the other end of the spring 34 abuts against the inner wall of the reset chamber 301 .

[0025] When the electromagnetic assembly 3 is not powered, the electromagnet 32 ​​on the electromagnetic assembly is pushed out and positioned on the baffle 2, and the baffle cannot be opened at this time. When the electromagnetic assembly 3 is powered, the electromagnet 32 ​​on the electromagnetic assembly is attracted by the electromagnetic coil 35 and retracts and detaches from the baffle 2, and the baffle 2 can be opened at this time.

[0026] When in use, the personnel place the panel, press the baffle 2 with the polarizer down to make the probe contact the panel, and when the product starts to be powered on for detection, the electromagnetic component switches from the powered-on state to the powered-off state. At this time, the electromagnetic coil 35 is powered off, and the electromagnet pops outward under the action of the spring 34, jamming the baffle to prevent the personnel from lifting the baffle and the probe without turning off the power during the inspection process.

[0027] In this embodiment, there are two ways for the electromagnet 32 ​​to clamp the baffle 2. The first is that a positioning hole is provided on the side of the baffle 2, and one end of the electromagnet 32 ​​is inserted into the positioning hole to position the baffle 2. The second is that the electromagnet 32 ​​is located above the baffle 2 when it is pushed out, and the lower edge of the electromagnet 32 ​​contacts the upper end surface of the baffle.

[0028] The above two structures can both achieve the purpose of positioning and limiting the movement of the baffle 2, thereby ensuring that the baffle 2 will not be hot-swapped due to human error during product testing.

[0029] In this embodiment, the power on and off of the electromagnetic assembly 3 is controlled by a single chip microcomputer. Specifically, the electromagnetic coil 35 is connected to a power control board, which has a 51 single chip microcomputer 6 and a power chip for controlling the power on and off of the electromagnetic coil. The circuit distribution is as follows: Figure 4 shown.

[0030] Since a single chip microcomputer is used to control the on and off of the electromagnetic component 3, the electrostatic protection device for lighting the LCD screen of the present application can be embedded in the overall panel processing production line and can be used in conjunction with other mechanisms.

[0031] The utility model prevents fooling by clamping the baffle plate through the electromagnet, effectively prevents hot plugging, and avoids the hot plugging problem when personnel operate during detection.

[0032] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A liquid crystal screen lighting electrostatic protection device, characterized in that: It includes a substrate, a baffle for positioning the product is provided on the substrate, and an electromagnetic component is provided on the substrate. When the electromagnetic component is not powered on, the electromagnet on the electromagnetic component is pushed out and positioned on the baffle; when the electromagnetic component is powered on, the electromagnet on the electromagnetic component is attracted by the electromagnetic coil and retracted and separated from the baffle.

2. The electrostatic protection device for LCD lighting according to claim 1, characterized in that: The electromagnetic assembly includes a shell, which has an electromagnetic cavity and a reset cavity. The electromagnetic cavity is provided with an electromagnetic coil connected to an external wire, and the electromagnetic coil is provided with an electromagnet; the shell has a channel through which the power supply magnet passes axially; the electromagnet is provided with a block, and the block is located in the reset cavity; the electromagnet is provided with a spring, one end of the spring abuts against the block, and the other end of the spring abuts against the inner wall of the reset cavity.

3. The electrostatic protection device for LCD lighting according to claim 2, characterized in that: The side of the baffle is provided with a positioning hole for inserting the power supply magnet.

4. The electrostatic protection device for LCD lighting according to claim 2, characterized in that: When the electromagnet is pushed out, it is located above the baffle, and the lower edge of the electromagnet contacts the upper end surface of the baffle.

5. The electrostatic protection device for LCD lighting according to claim 3 or 4, characterized in that: One side of the baffle is hinged on a hinge seat, and the hinge seat is fixed on a base plate.

6. The electrostatic protection device for LCD lighting according to claim 2, characterized in that: The electromagnetic coil is connected to a power control board, and the power control board is provided with a 51 single chip microcomputer and a power chip for controlling the on and off of the electromagnetic coil.

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