Wearable small-size liquid crystal display screen
By setting the peripheral wiring part in the display area in the wearable small-size LCD screen, using transparent ITO materials to reduce edge accuracy requirements, the problem of insufficient sealing is solved, and the expansion of the dispensing area and the improvement of sealing is achieved.
Patent Information
- Application Number
- CN202421628434.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-10
- Publication Date
- 2025-04-22
- Estimated Expiration
- 2034-07-10
AI Technical Summary
The existing wearable small-size LCD displays have insufficient sealing properties, which is mainly due to the small area of the dispensing area, which affects the sealing properties of the entire machine.
By setting the peripheral trace in the display area, the edge accuracy requirements are reduced by using transparent ITO materials, and the space occupied by the sensor film is reduced, thereby expanding the dispensing area.
The area of the dispensing area is improved, the sealing of the product is enhanced, and thus the competitiveness of the product is enhanced.
Smart Images
Figure CN222784715U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of liquid crystal display, and more specifically to a wearable small-size liquid crystal display screen. Background Art
[0002] With the improvement of intelligence level, smart wearable watches have become a necessity in people's lives. Low-end watch products that pursue cost-effectiveness generally use TFT with external TP. The TP structure generally uses GF. The position between the outer periphery of the cover and the sensor film is the glue spotting area of the customer case. The size of this area determines the sealing of the whole machine. The size of this area depends on the size of the cover and the sensor film. The larger the distance between the edge of the cover and the edge of the sensor film, the larger the glue spotting area and the better the sealing. The smaller the distance between the edge of the cover and the edge of the sensor film, the smaller the glue spotting area and the worse the sealing.
[0003] The sensor film needs enough space for routing and cannot be reduced in size. If the periphery of the sensor film is limited, the size needs to be increased, which will seriously reduce the glue dispensing area and affect the sealing of the whole device. If the glue is dispensed on the sensor film, there will be a step difference, which will also affect the sealing.
[0004] The current sensor film design generally has an ITO pattern in the display area. The ITO material is transparent, and the peripheral wiring uses silver paste wiring. The silver paste material is opaque. The peripheral wiring is overlapped with the ITO pattern in the display area through silk screen printing to achieve circuit connectivity. Due to the tolerance of silk screen printing, the peripheral wiring must generally be kept away from the display area by a certain distance, such as 0.3mm-0.5mm from the display area, to prevent the silver paste from entering the viewing area and being discovered by the user. This results in an increase in the space occupied by the peripheral wiring, resulting in a smaller dispensing area, which reduces the sealing of the product. Utility Model Content
[0005] The technical problem to be solved by the utility model is how to increase the area of the glue dispensing area and improve the sealing performance of the product.
[0006] The technical problem to be solved by the utility model is achieved through the following technical solutions:
[0007] In order to solve the above technical problems, the utility model provides a wearable small-size liquid crystal display screen, which includes a cover plate and a sensor film, wherein the sensor film is arranged on the lower surface of the cover plate, the area of the sensor film is smaller than the area of the cover plate, the cover plate includes a display area and a non-display area, the display area is arranged in the middle part of the cover plate, and the non-display area surrounds the display area, an ITO pattern and peripheral wiring are arranged on the sensor film, the ITO pattern is arranged in the display area, the material of the peripheral wiring is ITO, part of the inner edge of the peripheral wiring is arranged in the display area, and another part of the peripheral wiring is arranged in the non-display area.
[0008] As a preferred implementation of the wearable small-size liquid crystal display provided by the utility model, the width of the peripheral wiring arranged in the display area is 0.3mm-0.5mm.
[0009] As a preferred implementation of the wearable small-size liquid crystal display provided by the utility model, glue is provided on the lower surface of the cover plate, the glue avoids the sensor film, and the cover plate is adhered and fixed to the casing by the glue.
[0010] As a preferred implementation of the wearable small-size liquid crystal display provided by the utility model, an FPC is bound to the sensor film located at the peripheral wiring lead-out end, a soldering pad is provided on the upper surface of the FPC, and the upper and lower surfaces of the FPC are covered with EMI shielding film, and the EMI shielding film is provided with an avoidance position at the soldering pad.
[0011] As a preferred implementation of the wearable small-size liquid crystal display provided by the utility model, the edge of the EMI shielding film located at the avoidance position is more than 0.5 mm away from the edge of the welding pad.
[0012] As a preferred implementation of the wearable small-size liquid crystal display provided by the utility model, a PET film is arranged between the FPC and the EMI shielding film, and the edge of the PET film close to the avoidance position exceeds the edge of the EMI shielding film.
[0013] As a preferred implementation of the wearable small-size liquid crystal display provided by the utility model, the edge of the PET film close to the avoidance position exceeds the edge of the EMI shielding film by more than 0.5 mm.
[0014] As a preferred implementation of the wearable small-size liquid crystal display provided by the utility model, a double-sided adhesive is provided on the bottom of the PET film.
[0015] As a preferred implementation of the wearable small-size liquid crystal display provided by the utility model, an insulating glue is provided at the edge of the welding pad.
[0016] As a preferred implementation of the wearable small-size liquid crystal display provided by the utility model, the insulating glue covers the avoidance position.
[0017] The utility model has the following beneficial effects:
[0018] Since the material of the peripheral wiring is also ITO, which is a transparent material, small-sized wearable products do not require high edge accuracy, so some edge touch effects can be sacrificed. Therefore, some peripheral wiring can be set in the display area to reduce the space occupied by the sensor film, leaving enough glue dispensing space for the casing to be pasted, increasing the glue dispensing area, and then improving the sealing of the product to enhance the competitiveness of the product. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the scheme in the present application, a brief introduction is given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0020] Figure 1 This is a structural schematic diagram of a wearable small-size liquid crystal display provided by the utility model.
[0021] Figure 2 for Figure 1 Schematic diagram of the improved structure of FPC.
[0022] Figure 3 for Figure 2 Cross-sectional view at AA in .
[0023] Figure 4 for Figure 3 Schematic diagram of the improved structure.
[0024] Description of Figure Numbers:
[0025] Cover plate 1; sensor film 2; ITO pattern 21; peripheral wiring 22;
[0026] FPC 3; solder pad 31; EMI shielding film 32; PET film 33; insulating glue 34. DETAILED DESCRIPTION
[0027] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.
[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0029] In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", and "third" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0030] The utility model provides a wearable small-size liquid crystal display screen, which comprises a cover plate and a sensor film, wherein the sensor film is arranged on the lower surface of the cover plate, the area of the sensor film is smaller than the area of the cover plate, the cover plate comprises a display area and a non-display area, the display area is arranged in the middle part of the cover plate, the non-display area surrounds the display area, an ITO pattern and a peripheral wiring are arranged on the sensor film, the ITO pattern is arranged in the display area, the material of the peripheral wiring is ITO, a part of the inner edge of the peripheral wiring is arranged in the display area, and another part of the peripheral wiring is arranged in the non-display area.
[0031] Since the material of the peripheral wiring is also ITO, which is a transparent material, small-sized wearable products do not require high edge accuracy, so some edge touch effects can be sacrificed. Therefore, some peripheral wiring can be set in the display area to reduce the space occupied by the sensor film, leaving enough glue dispensing space for the casing to be pasted, increasing the glue dispensing area, and then improving the sealing of the product to enhance the competitiveness of the product.
[0032] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings. The present invention is described in detail below in conjunction with the accompanying drawings and embodiments, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limitations on the present invention.
[0033] See also Figure 1 , a wearable small-size liquid crystal display screen provided by the utility model, comprising a cover plate 1 and a sensor film 2, wherein the sensor film 2 is arranged on the lower surface of the cover plate 1, the area of the sensor film 2 is smaller than the area of the cover plate 1, the cover plate 1 comprises a display area and a non-display area, the display area is arranged in the middle part of the cover plate 1, and the non-display area surrounds the display area, an ITO pattern 21 and a peripheral wiring 22 are arranged on the sensor film 2, the ITO pattern 21 is arranged in the display area, the material of the peripheral wiring 22 is a transparent material ITO, part of the inner edge of the peripheral wiring 22 is arranged in the display area, and the other part of the peripheral wiring 22 is arranged in the non-display area. Since the material of the peripheral wiring 22 is also ITO, which is a transparent material, the edge precision requirement of the wearable small-size product is not high, so part of the edge touch effect can be sacrificed, so part of the peripheral wiring 22 can be arranged in the display area to reduce the space occupied by the sensor film 2, leave enough glue dispensing space for the casing to be pasted, increase the glue dispensing area, and then improve the sealing of the product to improve the competitiveness of the product.
[0034] Furthermore, the width of the peripheral wiring 22 arranged in the display area is 0.3mm-0.5mm, which means sacrificing 0.3mm-0.5mm edge touch effect. Compared with the traditional solution where the peripheral wiring 22 is made of silver paste and needs to be 0.3mm-0.5mm away from the display area, the glue dispensing space can be increased by 0.6mm-1.0mm, greatly improving the sealing of the product.
[0035] Furthermore, glue is provided on the lower surface of the cover plate 1 , the glue avoids the sensor film 2 , and the cover plate 1 is adhered and fixed to the housing by the glue.
[0036] See also Figure 2 and Figure 3As a further optimization scheme of Example 1, in this embodiment, the sensor film 2 at the lead-out end of the peripheral wiring 22 is bound with FPC3, the upper surface of FPC3 is provided with a soldering pad 31, the upper and lower surfaces of FPC3 are covered with EMI shielding films 32, and the EMI shielding films 32 are provided with a avoidance position at the soldering pad 31. Since the upper and lower surfaces of FPC3 are provided with EMI shielding films 32, the electromagnetic shielding capability of FPC3 can be greatly improved, the stability of signal transmission is improved, various functional problems and poor display effects are avoided, and the competitiveness of the product is improved.
[0037] Furthermore, the edge of the EMI shielding film 32 located at the avoidance position is more than 0.5 mm away from the edge of the pad 31, so as to prevent the edge of the EMI shielding film 32 from contacting the pad 31 and causing a circuit break.
[0038] Furthermore, a PET film 33 is provided between the FPC 3 and the EMI shielding film 32, and the edge of the PET film 33 near the avoidance position exceeds the edge of the EMI shielding film 32. By extending the edge of the PET film 33 near the pad 31, the edge of the PET film 33 is pulled away from the edge of the EMI shielding film 32 by a certain distance, so that even if there is a certain operation error during the attachment, the edge of the EMI shielding film 32 can be ensured not to touch the edge of the pad 31, thereby insulating the edge of the EMI shielding film 32 and preventing the occurrence of a short circuit problem caused by the edge of the EMI shielding film 32 touching the pad 31, thereby improving the attachment efficiency and production yield.
[0039] Furthermore, the edge of the PET film 33 near the avoidance position exceeds the edge of the EMI shielding film 32 by more than 0.5 mm, so as to ensure that the edge of the EMI shielding film 32 does not touch the pad 31, thereby insulating the edge of the EMI shielding film 32 and preventing the occurrence of a short circuit problem caused by the edge of the EMI shielding film 32 touching the pad 31, thereby improving the attachment efficiency and production yield.
[0040] Further, the bottom of the PET film 33 is provided with a double-sided adhesive or the bottom of the PET film 33 is coated with glue. Since some PET films 33 are not sticky or have insufficient stickiness, the bottom of the PET film 33 is provided with a double-sided adhesive or coated with glue, so that the PET film 33 can be adhered to the FPC 3.
[0041] See also Figure 4 Furthermore, an insulating glue 34 is provided at the edge of the pad 31 , and the insulating glue 34 covers the avoidance position to protect the edge of the pad 31 .
[0042] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0043] Obviously, the embodiments described above are only some embodiments of the present application, rather than all embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to perform equivalent replacement of some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of this application, directly or indirectly used in other related technical fields, is similarly within the scope of patent protection of this application.
Claims
1. A wearable small-size liquid crystal display screen, characterized in that: It includes a cover plate and a sensor film, wherein the sensor film is arranged on the lower surface of the cover plate, the area of the sensor film is smaller than the area of the cover plate, the cover plate includes a display area and a non-display area, the display area is arranged in the middle part of the cover plate, and the non-display area surrounds the display area, an ITO pattern and peripheral wiring are arranged on the sensor film, the ITO pattern is arranged in the display area, the material of the peripheral wiring is ITO, part of the inner edge of the peripheral wiring is arranged in the display area, and another part of the peripheral wiring is arranged in the non-display area.
2. The wearable small-size liquid crystal display according to claim 1, characterized in that: The width of the peripheral wiring arranged in the display area is 0.3mm-0.5mm.
3. The wearable small-size liquid crystal display according to claim 1, characterized in that: The lower surface of the cover plate is provided with glue, the glue avoids the sensor film, and the cover plate is adhered and fixed to the housing through the glue.
4. The wearable small-size liquid crystal display according to claim 1, characterized in that: The sensor film at the peripheral wiring lead-out end is bound with an FPC, a soldering pad is arranged on the upper surface of the FPC, and both the upper and lower surfaces of the FPC are covered with an EMI shielding film, and the EMI shielding film is provided with an avoidance position at the soldering pad.
5. The wearable small-size liquid crystal display according to claim 4, characterized in that: The edge of the EMI shielding film located at the avoidance position is more than 0.5 mm away from the edge of the pad.
6. The wearable small-size liquid crystal display according to claim 4, characterized in that: A PET film is arranged between the FPC and the EMI shielding film, and an edge of the PET film close to the avoidance position exceeds an edge of the EMI shielding film.
7. The wearable small-size liquid crystal display according to claim 6, characterized in that: The edge of the PET film close to the avoidance position exceeds the edge of the EMI shielding film by more than 0.5 mm.
8. The wearable small-size liquid crystal display according to claim 6, characterized in that: The bottom of the PET film is provided with double-sided adhesive.
9. The wearable small-size liquid crystal display according to claim 4, characterized in that: Insulating glue is provided at the edge of the pad.
10. The wearable small-size liquid crystal display according to claim 9, characterized in that: The insulating glue covers the avoidance position.