Structure for improving laminating precision of foam of display module

Abstract

The utility model discloses a structure for improving the laminating precision of foam of a display module. The structure comprises a display screen, the foam, a COF, a display FPC and a touch FPC, the display screen comprises a display screen base material, and display screen Marks are arranged at the bottom corners of the left side and the right side of the bottom of the front face of the display screen base material. The shape and the size of the front face of the foam are matched with the shape and the size of the front face of the display screen, and foam Marks are arranged on the left side and the right side of the bottom of the front face of the foam. According to the structure for improving the laminating precision of the foam of the display module, the display screen Marks are arranged at the two corners of the bottom of the display screen base material, the two corners of the bottom of the foam are designed to be concave, and the foam Marks are arranged on the concave design, so that alignment can be carried out when the foam is laminated, and accurate alignment can be carried out by utilizing CCD (Charge Coupled Device) equipment; therefore, the precision of the foam during fitting can be improved, and the falling reliability of the product is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of display modules, and in particular to a structure for improving the foam lamination accuracy of display modules. Background Art

[0002] With the improvement of living standards, smart wearable devices such as bracelets / watches are becoming more and more common, and the functions integrated in products are becoming more and more diverse. Since the structure of watch products is relatively compact and the battery size is relatively small, the current standby time is a bottleneck in the industry. The mid-to-high-end watch products in the industry all use AMOLED displays. Its advantage of self-luminescence without backlight can effectively reduce the stacking thickness of the whole product or increase the battery capacity. At present, this type of AMOLED display module, because the thickness of the LTPS backplane is usually 0.2-0.3mm, the reliability of falling and other reliability is prone to poor screen cracking. It is usually necessary to attach a layer of foam to the back of the glass substrate of the display screen to improve the reliability of the product falling, and the accuracy of foam attachment will affect the reliability verification results. Therefore, a structure that improves the accuracy of foam attachment of display modules is designed to improve the accuracy of foam attachment of AMOLED products in energy efficiency. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a structure that improves the foam lamination accuracy of a display module.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] A structure for improving the foam bonding accuracy of a display module, comprising: a display screen, foam, COF, a display FPC and a touch FPC; the display screen comprises a display screen substrate, and display screen Marks are arranged on the left and right bottom corners of the front bottom of the display screen substrate; the shape and size of the front side of the foam match the shape and size of the front side of the display screen, and foam Marks are arranged on the left and right sides of the front bottom of the foam, and the foam is aligned and bonded together by the foam Marks and the display screen Marks; the COF is arranged at the center of the bottom of the display screen, the display FPC is arranged at the bottom of the COF, and the touch FPC is arranged on the right side of the bottom of the display screen.

[0006] In one of the embodiments, a tear-off handle is provided at the center of the top of the foam, and the left and right bottom corners of the bottom of the foam are recessed toward the center of the display screen substrate to expose the display screen Mark on the bottom of the display screen substrate.

[0007] In one of the embodiments, the front shapes of the display screen Mark and the foam Mark are cross-shaped, and the display screen Mark and the foam Mark are aligned by a CCD lens.

[0008] In one of the embodiments, the display screen Mark is disposed on the display screen substrate by using a TFT process of exposure and development.

[0009] In one of the embodiments, the foam Mark is set on the foam using a precision punching die process.

[0010] In one of the embodiments, a COF chip is disposed at the center of the COF front surface, and the length of the COF front surface is smaller than the length of the display screen front surface.

[0011] In one of the embodiments, the touch FPC is arranged on the right side of the bottom of the display screen, and the bottom of the touch FPC is hidden behind the back of the display FPC.

[0012] In one of the embodiments, an FPC binding position is provided on the left side of the front side of the display FPC, and the FPC binding position is connected to the display module mainboard.

[0013] In one of the embodiments, the display FPC and the touch FPC are both flexible circuit boards, and the display FPC and the touch FPC are both bent to the back of the display screen.

[0014] In one of the embodiments, the four corners of the front side of the display screen are rounded.

[0015] Compared with the prior art, the utility model has at least the following advantages:

[0016] The structure of the utility model improves the accuracy of foam fitting of the display module. By setting display mark marks on the two bottom corners of the display screen substrate and recessed designs at the two bottom corners of the foam and foam mark marks set thereon, alignment can be performed when the foam is fitted. Accurate alignment can be performed using a CCD device, thereby improving the accuracy of the foam during fitting and thus enhancing the drop reliability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a front overall schematic diagram of a structure for improving the foam lamination accuracy of a display module according to the utility model;

[0019] Figure 2 This is a schematic diagram of point A in the figure for improving the foam fitting accuracy of the display module according to the present invention.

[0020] In the figure: 1. Display screen; 11. Display screen substrate; 12. Display screen mark; 2. Foam; 21. Tear-off handle; 22. Foam mark; 3. COF; 31. COF chip; 4. Display FPC; 41. FPC binding position; 5. Touch FPC. DETAILED DESCRIPTION

[0021] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the relevant drawings. The drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly and comprehensively understood.

[0022] In the description of the present application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to 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 application.

[0023] Unless otherwise clearly stipulated and limited, terms such as "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0025] like Figure 1-2As shown, a structure for improving the foam bonding accuracy of a display module includes: a display screen 1, foam 2, COF3, display FPC4 and touch FPC5; the display screen 1 includes a display screen substrate 11, and display screen Marks 12 are provided on the left and right bottom corners of the front bottom of the display screen substrate 11; the shape and size of the front of the foam 2 match the shape and size of the front of the display screen 1, and foam Marks 22 are provided on the left and right sides of the front bottom of the foam 2, and the foam 2 is aligned and bonded together through the foam Marks 22 and the display Marks 12; COF3 is set at the center of the bottom of the display screen 1, the display FPC4 is set at the bottom of COF3, and the touch FPC5 is set on the right side of the bottom of the display screen 1. It should be noted that the foam 2 is bonded to the back of the display layer of the display screen 1, and the side of the foam 2 close to the display screen 1 is coated with glue.

[0026] like Figure 1-2 As shown, in one embodiment, a tear-off handle 21 is provided at the center of the top of the foam 2, and the left and right bottom corners of the bottom of the foam 2 are recessed toward the center of the display screen substrate 11 to expose the display screen Mark 12 on the bottom of the display screen substrate 11. It should be noted that this design can prevent the display screen Mark 12 designed on the display screen substrate 11 and the foam Mark 22 on the foam 2 from being blocked and affecting the alignment during the lamination work, and the tear-off handle 21 can facilitate the staff to tear off the release film on the surface of the foam 2.

[0027] like Figure 1-2 As shown in the figure, in one embodiment, the front shape of the display screen Mark 12 and the foam Mark 22 is a cross, and the display screen Mark 12 and the foam Mark 22 are aligned by the CCD lens. It should be noted that the CCD device can automatically identify the display screen Mark 12 on the display screen substrate 11 and the foam Mark 22 on the foam, and adjust them to the relative position range set by the software for attachment, thereby achieving precise attachment.

[0028] like Figure 1-2 As shown in one embodiment, the display screen Mark 12 is disposed on the display screen substrate 11 by using a TFT process of exposure and development. It should be noted that the display screen Mark is made of metal such as molybdenum aluminum and is protruded from the surface of the display screen substrate 11.

[0029] like Figure 1-2 As shown in an embodiment, the foam Mark 22 is set on the foam 2 by using a precision punching die process. It should be noted that the foam Mark 22 is designed to be concave on the surface of the foam 2.

[0030] like Figure 1-2As shown, in one embodiment, a COF chip 31 is disposed in the center of the front of the COF 3, and the length of the front of the COF 3 is less than the length of the front of the display screen 1. It should be noted that this design allows the COF 3 to be bent to the back of the display screen 1.

[0031] like Figure 1-2 As shown, in one embodiment, the touch FPC 5 is arranged on the right side of the bottom of the display screen 1, and the bottom of the touch FPC 5 is hidden behind the back of the display FPC 4. It should be noted that the touch FPC 5 and the display FPC 4 are connected together by gold finger binding.

[0032] like Figure 1-2 As shown, in one embodiment, a FPC binding position 41 is provided on the left side of the front of the display FPC 4, and the FPC binding position 41 is connected to the display module motherboard. It should be noted that a number of metal PINs are provided on the FPC binding position 41 for connecting with the motherboard.

[0033] like Figure 1-2 As shown, in one embodiment, the display FPC 4 and the touch FPC 5 are both flexible circuit boards, and the display FPC 4 and the touch FPC 5 are both bent to the back of the display screen 1. It should be noted that this design can reduce the area occupied by the entire display screen 1.

[0034] like Figure 1-2 As shown, in one embodiment, the four corners of the front of the display screen 1 are all rounded. It should be noted that this design can enhance the safety performance of the display screen 1.

[0035] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A structure for improving the foam lamination accuracy of a display module, characterized in that: include: Display screen (1), foam (2), COF (3), display FPC (4) and touch FPC (5); The display screen (1) comprises a display screen substrate (11), and display screen Marks (12) are arranged on the left and right bottom corners of the bottom of the front side of the display screen substrate (11); The shape and size of the front side of the foam (2) match the shape and size of the front side of the display screen (1), and foam Marks (22) are provided on both the left and right sides of the bottom of the front side of the foam (2), and the foam (2) is aligned and bonded together by the foam Marks (22) and the display screen Marks (12); The COF (3) is arranged at the center of the bottom of the display screen (1), the display FPC (4) is arranged at the bottom of the COF (3), and the touch FPC (5) is arranged on the right side of the bottom of the display screen (1).

2. The structure for improving the foam lamination accuracy of a display module according to claim 1, characterized in that: A tear-off handle (21) is provided at the center of the top of the foam (2), and the left and right bottom corners of the bottom of the foam (2) are recessed toward the center of the display screen substrate (11) to expose the display screen Mark (12) on the bottom of the display screen substrate (11).

3. The structure for improving the foam lamination accuracy of a display module according to claim 1, characterized in that: The front shapes of the display screen Mark mark (12) and the foam Mark mark (22) are cross-shaped, and the display screen Mark mark (12) and the foam Mark mark (22) are aligned by grabbing the mark through a CCD lens.

4. The structure for improving the foam lamination accuracy of a display module according to claim 1, characterized in that: The display screen Mark (12) is arranged on the display screen substrate (11) by using a TFT process of exposure and development.

5. The structure for improving the foam lamination accuracy of a display module according to claim 1, characterized in that: The foam mark (22) is set on the foam (2) by using a precision punching die process.

6. The structure for improving the foam lamination accuracy of a display module according to claim 1, characterized in that: A COF chip (31) is arranged at the center of the front of the COF (3), and the length of the front of the COF (3) is shorter than the length of the front of the display screen (1).

7. The structure for improving the foam lamination accuracy of a display module according to claim 1, characterized in that: The touch FPC (5) is arranged on the right side of the bottom of the display screen (1), and the bottom of the touch FPC (5) is hidden behind the back of the display FPC (4).

8. The structure for improving the foam lamination accuracy of a display module according to claim 1, characterized in that: An FPC binding position (41) is arranged on the left side of the front face of the display FPC (4), and the FPC binding position (41) is connected to the display module mainboard.

9. The structure for improving the foam lamination accuracy of a display module according to claim 1, characterized in that: The display FPC (4) and the touch FPC (5) are both flexible circuit boards, and the display FPC (4) and the touch FPC (5) are both bent to the back of the display screen (1).

10. The structure for improving the foam lamination accuracy of a display module according to claim 1, characterized in that: The four corners of the front side of the display screen (1) are all rounded.

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