Anti-static display screen and electronic equipment

Abstract

The invention relates to an anti-static display screen and electronic equipment, and belongs to the technical field of display modules.The anti-static display screen comprises a backlight module, the backlight module comprises a conductive frame, a light guide plate arranged in the conductive frame, a liquid crystal module and a transparent conductive layer arranged on the conductive frame, the transparent conducting layer is arranged on the side, close to the light guide plate, of the liquid crystal module, a plurality of positioning holes are formed in the edge of the transparent conducting layer at intervals, the columnar conducting pieces are arranged on the conducting frame at intervals, and the bottom ends of the columnar conducting pieces are electrically connected with the conducting frame; each columnar conductive piece penetrates through the corresponding positioning hole and abuts against the liquid crystal module. The outer wall of the columnar conductive part abuts against the hole wall of the positioning hole in an interference mode so as to apply tension force to the transparent conductive layer, and meanwhile static electricity on the transparent conductive layer is led out through the conductive frame. By means of the conductivity of the columnar conductive piece and cooperation between the columnar conductive piece and the transparent conductive layer, static electricity in the display module is eliminated, and meanwhile light transmission is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of LCM display, in particular to a display screen with anti-static function and electronic equipment. BACKGROUND

[0002] Liquid crystal panel (LCM) as a core component of modern electronic equipment, is widely used in consumer electronics, industrial control and other fields, with the development of display technology to high resolution, thin, the internal circuit integration of module is improved, the problem of static sensitivity is increasingly prominent, electrostatic discharge has become one of the main factors leading to module failure.

[0003] The source of static electricity is mainly the static electricity generated by the friction on the surface of the module and the static electricity introduced from the outside to the internal circuit board through the conductive interface, etc. The latter is more harmful to the module. The existing liquid crystal panel generally adopts external anti-static film and sets up metal bracket grounding to cope with it. By directly grounding the shell, the generated static electricity is led to the ground to achieve the purpose of module anti-static; At the same time, even if the above scheme uses a transparent conductive film to lead out static electricity, small wrinkles or relaxation may be caused by its own gravity or assembly tolerance during assembly. These wrinkles will cause refraction deviation of light path in precise optical display, resulting in moire fringes or uneven display, which seriously affects the picture quality. SUMMARY

[0004] The present application provides a display screen with anti-static function and electronic equipment, which can solve the problem that the existing liquid crystal panel cannot guarantee the anti-static property while considering its own light transmission and display uniformity.

[0005] The technical scheme of the present application is as follows: a display screen with anti-static function, comprising: a backlight module, the backlight module comprising a conductive frame and a light guide plate arranged inside the conductive frame; a liquid crystal module arranged on the conductive frame; a transparent conductive layer arranged on the side of the liquid crystal module close to the light guide plate, the edge of the transparent conductive layer being provided with a plurality of positioning holes; a plurality of columnar conductive members arranged on the conductive frame, and the bottom end of each columnar conductive member being electrically connected with the conductive frame; wherein each columnar conductive member passes through the corresponding positioning hole and abuts against the liquid crystal module; the outer wall of the columnar conductive member and the hole wall of the positioning hole are in interference abutment, so as to apply tension to the transparent conductive layer and lead out the static electricity on the transparent conductive layer through the conductive frame.

[0006] By adopting the above scheme, a single columnar conductive piece can be used to establish a low-impedance grounding path, so as to quickly lead the static electricity accumulated on the liquid crystal module and the transparent conductive layer to the grounding end of the LED light bar, thereby effectively preventing the influence of static breakdown or electromagnetic interference on the display effect. On the other hand, the structure can apply a tension force to the transparent conductive layer, so as to effectively eliminate the wrinkles of the transparent conductive layer caused by gravity or assembly allowance, ensure the flatness of the transparent conductive layer in the optical visible area, and reduce the risk of optical unevenness caused by the unevenness of the device.

[0007] In one embodiment of the present application, the distribution interval of the columnar conductive pieces on the conductive frame is greater than the distribution interval of the positioning holes in the natural relaxed state of the transparent conductive layer. The transparent conductive layer is in an elastic tension state when assembled on the columnar conductive pieces.

[0008] By adopting the above scheme, the radial pressure generated by the interference fit eliminates the assembly gap between the columnar conductive piece and the positioning hole, so as to realize the close mechanical connection and stable electrical conduction therebetween. Meanwhile, the annular contact surface provides 360-degree omnidirectional contact, effectively reduces the contact resistance, and improves the reliability of the anti-static circuit.

[0009] In one embodiment of the present application, the columnar conductive piece is an elastic columnar member, and the diameter of the columnar conductive piece is greater than the diameter of the positioning hole.

[0010] By adopting the above scheme, the elastic deformation capability of the columnar conductive piece can absorb the assembly tolerance of the liquid crystal module and the backlight module in the vertical direction, thereby playing the role of a buffer pad. Meanwhile, the diameter difference causes the member to always maintain an elastic restoring force outward after passing through the positioning hole. The spacing between the relative columnar conductive pieces can be adjusted during assembly, so that the columnar conductive piece always tensions the transparent conductive layer by using the elastic force in the radial direction.

[0011] In one embodiment of the present application, the columnar conductive piece is an elastic frustum-shaped member, the cross-sectional area of the other end of the columnar conductive piece is greater than the cross-sectional area of one end thereof, and the projection area of the columnar conductive piece on the transparent conductive layer is greater than the projection area of the positioning hole on the transparent conductive layer.

[0012] By adopting the above scheme, the columnar conductive piece in the frustum shape converts the assembly pressure in the vertical direction into a horizontal component, so that when the transparent conductive layer is sleeved on the member, the outward expansion tension of the frustum inclined surface on the edge of the positioning hole actively stretches and tensions the transparent conductive layer, thereby further ensuring that the transparent conductive layer is in a taut and flat state, and helping to prevent the transparent conductive layer from causing interference stripes due to local relaxation.

[0013] In one embodiment of this application, one end of the columnar conductive member is electrically connected to the grounding terminal of the LED light strip, and the grounding lead of the liquid crystal module is electrically connected to the other end of the columnar conductive member.

[0014] By adopting the above solution, by connecting the two ends of the columnar conductive component to the grounding terminal of the LED light strip and the grounding lead of the liquid crystal module respectively, the static charge accumulated inside the liquid crystal module and between the liquid crystal module and the transparent conductive layer can be discharged through the grounding terminal of the LED light strip itself, thereby reducing the interference of static electricity on the display screen.

[0015] In one embodiment of this application, the backlight module further includes: A back panel, wherein a placement cavity is provided inside the back panel, and a reflective layer is provided at the bottom of the placement cavity; The light guide plate is located above the reflective layer, and the LED light strip emits light, so that the light enters from the side of the light guide plate and exits from the upper surface of the light guide plate; An optical film is disposed above the light guide plate and located between the light guide plate and the transparent conductive layer.

[0016] By adopting the above solution, and by placing the LED light strip on the side of the light guide plate, the point light source emitted by the LED is converted into a uniform surface light source through the conduction and total reflection of the light guide plate, which improves the utilization rate and uniformity of light output, while ensuring the thinness and light weight of the entire device.

[0017] In one embodiment of this application, the columnar conductive element is provided with a flexible reflective layer on its exterior, and the flexible reflective layer is provided with a reflective slope on the side near the light guide plate. The reflective slope is designed to reflect light incident on its own surface into the liquid crystal module.

[0018] By adopting the above solution, since the columnar conductive component is located at the edge of the screen, the reflective slope can effectively intercept and reflect stray light escaping from the side of the light guide plate upwards, providing supplementary light to the usually darker screen edge area, thereby improving the overall brightness uniformity of the display.

[0019] In one embodiment of this application, a hollow reflector is also included. The LED light strip is provided with multiple LED beads. Multiple reflectors are provided and are assembled on the outside of the LED beads one by one. The inner wall of the reflector is provided with a reflective surface, which is designed to reflect the light emitted from the side of the LED beads into the light guide plate.

[0020] By adopting the above solution, the reflector can constrain the divergence angle of the LED beads, collect the lateral light that would otherwise be dissipated to the sides or absorbed by the frame, and redirect it into the light-incident surface of the light guide plate, thereby reducing light loss at the light source end and improving the overall brightness of the backlight module without increasing power consumption.

[0021] In one embodiment of this application, an annular reflective plane is provided on the inner wall of the bottom end of the reflective disk, and an annular reflective inclined surface is provided on the inner side wall of the reflective disk. The annular reflective plane and the annular reflective inclined surface enclose each other to form the reflective surface.

[0022] By adopting the above scheme, the combination of the circular bottom surface and the annular sidewall allows the light emitted from the LED beads at various angles to enter the effective light path after one or more reflections, further optimizing the light energy utilization rate and significantly improving the light coupling efficiency between the LED light source and the light guide plate.

[0023] The second objective of this invention is to provide an electronic device.

[0024] The technical solution is as follows: An electronic device, including an anti-static display screen.

[0025] By adopting the above solution, an anti-static display screen can be installed on electronic devices. This ensures that the display screen itself is thin and light, while eliminating its own static electricity, thereby improving the anti-static capability of the entire electronic device.

[0026] In summary, this application includes at least one of the following beneficial technical effects: by designing a special columnar conductive component, not only can a low-impedance electrostatic discharge channel be formed between the liquid crystal module and the grounding terminal of the LED light strip, effectively avoiding the risk of electrostatic breakdown, but also by using the columnar conductive component as a tensioning fulcrum, a continuous tension force is applied to the transparent conductive layer, effectively eliminating wrinkles and loosening of the transparent conductive layer caused by assembly allowance or gravity, which helps to prevent the device from producing optical interference fringes or poor contact, and improves the flatness and reliability of the display.

[0027] By employing a flexible frustum-shaped cylindrical conductive component, the vertical assembly pressure is converted into a horizontal radial expansion force using the inclined surface of the frustum. When the transparent conductive layer is fitted onto this component, the conical inclined surface generates outward expansion tension on the edge of the positioning hole, thereby achieving active stretching of the transparent conductive layer. At the same time, the component's own elastic deformation capability can absorb the vertical assembly tolerance between the LCD module and the backlight module, playing a buffering and protective role and preventing stress damage to the LCD screen caused by rigid contact.

[0028] By setting a flexible reflective layer with a reflective slope, stray light escaping from the side of the light guide plate can be effectively intercepted and reflected upwards, providing directional supplementary light to the screen edge area, which is usually dark due to light absorption or leakage. This improves the brightness uniformity of the LCD module edge without increasing the power consumption of additional light sources. Attached Figure Description

[0029] Figure 1 This is a three-dimensional exploded view of an anti-static display screen provided in the first embodiment of this application; Figure 2 This is a planar cross-sectional view of an anti-static display screen provided in the first embodiment of this application; Figure 3 yes Figure 2 An enlarged schematic diagram of part A in the middle; Figure 4 This is a planar cross-sectional view of an anti-static columnar conductive component for a display screen provided in the first embodiment of this application; Figure 5 This is a planar cross-sectional view of an anti-static columnar conductive component for a display screen provided in the second embodiment of this application; Figure 6 This is an optical path diagram of an anti-static columnar conductive element for a display screen provided in the first embodiment of this application; Figure 7 This is an optical path diagram of an anti-static columnar conductive element for a display screen provided in the second embodiment of this application; Figure 8 This is a front sectional view of an anti-static display screen reflector provided in the first embodiment of this application.

[0030] Explanation of reference numerals in the attached drawings: 1. Backlight module; 11. Conductive frame; 111. LED light strip; 12. Back plate; 13. Light guide plate; 14. Optical film; 15. Reflective layer; 2. Liquid crystal module; 3. Transparent conductive layer; 31. Positioning hole; 4. Columnar conductive component; 41. Flexible reflective layer; 411. Reflective slope; 5. Reflective disk; 51. Reflective surface; 511. Annular reflective plane; 512. Annular reflective slope. Detailed Implementation

[0031] The following is in conjunction with the appendix Figures 1-8 This application provides a further detailed description of an anti-static display screen and electronic device.

[0032] An anti-static display screen provided in this application embodiment includes: a backlight module 1 and a liquid crystal module 2.

[0033] In Example 1, the backlight module 1 includes a conductive frame 11, an LED light strip 111 is provided on the inner wall of one side of the conductive frame 11, a light guide plate 13 is provided inside the conductive frame 11, a liquid crystal module 2 is assembled on the upper end of the conductive frame 11, a transparent conductive layer 3 is provided between the liquid crystal module 2 and the light guide plate 13, and columnar conductive elements 4 are provided circumferentially along the side edge of the transparent conductive layer 3. One end of the columnar conductive element 4 is fixedly assembled on the conductive frame 11, and the other end extends upward and is connected to the liquid crystal module 2. The transparent conductive layer 3 is used to conduct static electricity generated on the lower surface of the liquid crystal module 2 to the columnar conductive element 4. The columnar conductive element 4 is designed to be electrically connected between the ground end of the liquid crystal module 2 and the LED light strip 111, so as to discharge static electricity and provide tension to the transparent conductive layer 3 at the same time. By using the columnar conductive element 4 to discharge static electricity and apply tension to the transparent conductive layer 3, the flatness of the transparent conductive layer 3 is ensured.

[0034] The columnar conductive element 4 is made of conductive material, with one end electrically contacting the liquid crystal module 2 and the transparent conductive layer 3, and the other end fixedly connected to the conductive frame 11. The conductive frame 11 serves as a common grounding terminal and is electrically connected to the grounding circuit of the LED light strip 111. Thus, the conductive support structure 4 can conduct static electricity into the grounding circuit or system ground of the LED light strip through the conductive frame 11.

[0035] In this embodiment, a transient voltage suppressor is provided on the LED light strip 111 to absorb transient static electricity; Since the columnar conductive component 4 is fixedly assembled on the conductive frame 11, and the conductive frame 11 itself has conductive properties and is electrically connected to the grounding terminal of the LED light strip 111, the columnar conductive component 4 can be electrically connected to the grounding terminal of the LED light strip 111 through the conductive frame 11. The transparent conductive layer 3 can be an ITO nanomesh or a graphene film, wherein the thickness of the transparent conductive layer 3 is 50 nm.

[0036] In this embodiment, in order to ensure the flatness of the surface of the transparent conductive layer 3, the center distance L1 between the two opposing columnar conductive elements 4 on the conductive frame 11 is designed to be slightly larger than the center distance L2 between the two corresponding positioning holes 31 of the transparent conductive layer 3 in the natural relaxed state.

[0037] During assembly, the transparent conductive layer 3 needs to be slightly elastically stretched before it can be fitted onto the columnar conductive component 4. The elastic recovery force of the transparent conductive layer 3 itself forms a continuous planar tension force between the columnar conductive components 4, thereby effectively eliminating wrinkles on the film surface and preventing optical interference fringes caused by film relaxation.

[0038] The transparent conductive layer 3 has multiple positioning holes 31 spaced apart circumferentially along its own edge. The columnar conductive element 4 passes through the positioning holes 31 vertically and is interference-fitted with the transparent conductive layer 3 to form an annular contact surface. The radial pressure generated by the interference fit eliminates the assembly gap between the columnar conductive element 4 and the positioning holes 31, thereby improving assembly stability.

[0039] The columnar conductive component 4 is an elastic columnar component. The diameter of the columnar conductive component 4 is larger than the diameter of the positioning hole 31. Utilizing the elastic deformation capability of the columnar conductive component 4 itself, it can absorb the assembly tolerance of the liquid crystal module 2 and the backlight module 1 in the vertical direction, and act as a buffer pad. At the same time, it uses radial elastic force to tension the transparent conductive layer 3.

[0040] In this embodiment, the columnar conductive component 4 can be a component made of conductive foam material or a component made of conductive rubber material. Its diameter is set to 2.0 mm, and the positioning hole diameter is set to 1.8 mm. During assembly, the columnar conductive component 4 is deformed under pressure, generating radial elastic force to tension the film.

[0041] One end of the columnar conductive element 4 is electrically connected to the grounding terminal of the LED light strip 111, and the grounding lead of the liquid crystal module 2 is electrically connected to the other end of the columnar conductive element 4. By connecting the two ends of the columnar conductive element 4 to the grounding terminal of the LED light strip 111 and the grounding lead of the liquid crystal module 2 respectively, the static charge inside the liquid crystal module 2 and between the liquid crystal module 2 and the transparent conductive layer 3 is accumulated, thereby reducing the interference of static electricity on the display screen.

[0042] The backlight module 1 also includes a back plate 12 and an optical film 14. The back plate 12 has a placement cavity inside, and a reflective layer 15 is provided at the bottom of the placement cavity. The light guide plate 13 is located above the reflective layer 15. The LED light strip 111 emits light, so that the light enters from the side of the light guide plate 13 and exits from the upper surface of the light guide plate 13. The optical film 14 is disposed above the light guide plate 13 and is located between the light guide plate 13 and the transparent conductive layer 3. By placing the LED light strip 111 on the side of the light guide plate 13 and converting it into a uniform surface light source through the conduction and total reflection of the light guide plate 13, the thinness of the entire device is ensured.

[0043] The columnar conductive component 4 is provided with a flexible reflective layer 41 on the outside. The flexible reflective layer 41 is provided with a reflective slope 411 on the side near the light guide plate 13. The reflective slope 411 is designed to reflect the light incident on its own surface into the liquid crystal module 2. By setting the reflective slope 411, stray light escaping from the side of the light guide plate 13 can be effectively intercepted and reflected upward, thereby improving the brightness uniformity of the overall display.

[0044] It also includes a hollow reflector 5. The LED light strip 111 is equipped with multiple LED beads. Multiple reflectors 5 are provided and are assembled on the outside of the LED beads one by one. The inner wall of the reflector 5 is provided with a reflective surface 51. The reflective surface 51 is designed to reflect the light emitted from the side of the LED beads into the light guide plate 13. The reflector 5 can reflect the side light of the LED beads that is dissipated to the side or absorbed by the frame and redirect it into the light incident surface of the light guide plate 13, thereby reducing light loss.

[0045] The inner wall of the bottom of the reflector 5 is provided with an annular reflective plane 511, and the inner side wall of the reflector 5 is provided with an annular reflective inclined surface 512. The annular reflective plane 511 and the annular reflective inclined surface 512 surround each other to form a reflective surface 51. Through the combination of the circular bottom surface and the annular side wall, the light emitted from the LED lamp bead at various angles can enter the effective light path after one or more reflections, which further optimizes the light energy utilization rate.

[0046] The second objective of this invention is to provide an electronic device.

[0047] The technical solution is as follows: An electronic device, including an anti-static display screen.

[0048] Example 2 is basically the same as Example 1 in structure. In order to further improve the tensioning ability of the columnar conductive component 4 on the transparent conductive layer 3, the difference is that the columnar conductive component 4 is an elastic frustum-shaped component. The cross-sectional area of ​​the other end of the columnar conductive component 4 is larger than the cross-sectional area of ​​one end of itself. The projected area of ​​the columnar conductive component 4 on the transparent conductive layer 3 is larger than the projected area of ​​the positioning hole 31 on the transparent conductive layer 3. By using the frustum-shaped columnar conductive component 4, the vertical assembly pressure is converted into a horizontal component force, thereby actively stretching and tensioning the transparent conductive layer 3, further ensuring that the transparent conductive layer 3 is in a taut and straight state.

[0049] In this embodiment, the bottom diameter of the columnar conductive element 4 is 2.2 mm and the top diameter is 1.8 mm. By utilizing the guiding effect of the inclined surface, the horizontal component force on the edge of the positioning hole is gradually increased during the pressing process.

[0050] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An anti-static display screen, characterized in that, include: A backlight module (1) includes a conductive frame (11) and a light guide plate (13) disposed inside the conductive frame (11). A liquid crystal module (2) is disposed on the conductive frame (11); A transparent conductive layer (3) is disposed on the side of the liquid crystal module (2) near the light guide plate (13), and the edge of the transparent conductive layer (3) is provided with a plurality of positioning holes (31) at intervals; Multiple columnar conductive elements (4) are spaced apart on the conductive frame (11), and the bottom end of the columnar conductive elements (4) is electrically connected to the conductive frame (11); wherein each columnar conductive element (4) passes through the corresponding positioning hole (31) and abuts against the liquid crystal module (2); the outer wall of the columnar conductive element (4) is press-fitted against the hole wall of the positioning hole (31) to apply tension to the transparent conductive layer (3) and simultaneously discharge the static electricity on the transparent conductive layer (3) through the conductive frame (11).

2. The anti-static display screen according to claim 1, characterized in that: The spacing between the columnar conductive elements (4) on the conductive frame (11) is greater than the spacing between the positioning holes (31) on the transparent conductive layer (3) when it is in a naturally relaxed state; the transparent conductive layer (3) is in an elastically stretched state when it is assembled on the columnar conductive elements (4).

3. The anti-static display screen according to claim 2, characterized in that: The columnar conductive element (4) is an elastic columnar component, and the diameter of the columnar conductive element (4) is larger than the diameter of the positioning hole (31).

4. The anti-static display screen according to claim 2, characterized in that: The columnar conductive element (4) is an elastic frustum-shaped component. The cross-sectional area of ​​the other end of the columnar conductive element (4) is greater than the cross-sectional area of ​​one end of itself. The projected area of ​​the columnar conductive element (4) on the transparent conductive layer (3) is greater than the projected area of ​​the positioning hole (31) on the transparent conductive layer (3).

5. The anti-static display screen according to claim 2, characterized in that: One end of the columnar conductive element (4) is electrically connected to the grounding terminal of the LED light strip (111), and the grounding lead of the liquid crystal module (2) is electrically connected to the other end of the columnar conductive element (4).

6. The anti-static display screen according to claim 1, characterized in that, The backlight module (1) also includes: A back plate (12) is provided inside the back plate (12), and a reflective layer (15) is provided at the bottom of the placement cavity; The light guide plate (13) is located above the reflective layer (15), and the LED light strip (111) emits light, so that the light enters from the side of the light guide plate (13) and exits from the upper surface of the light guide plate (13); An optical film (14) is disposed above the light guide plate (13) and between the light guide plate (13) and the transparent conductive layer (3).

7. An anti-static display screen according to any one of claims 3 or 4, characterized in that: The columnar conductive component (4) is provided with a flexible reflective layer (41) on the outside. The flexible reflective layer (41) is provided with a reflective slope (411) on the side near the light guide plate (13). The reflective slope (411) is designed to reflect the light incident on its own surface into the liquid crystal module (2).

8. The anti-static display screen according to claim 6, characterized in that: It also includes a hollow reflector (5), on which multiple LED beads are provided. Multiple reflectors (5) are provided and are assembled on the outside of the LED beads one by one. The inner wall of the reflector (5) is provided with a reflective surface (51), which is designed to reflect the light emitted from the side of the LED beads into the light guide plate (13).

9. The anti-static display screen according to claim 8, characterized in that: The inner wall of the bottom end of the reflector (5) is provided with an annular reflective plane (511), and the inner wall of the reflector (5) is provided with an annular reflective inclined surface (512). The annular reflective plane (511) and the annular reflective inclined surface (512) surround each other to form the reflective surface (51).

10. An electronic device, characterized in that: Including an anti-static display screen as described in any one of claims 1-9.

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