Optical fingerprint module FPC connection structure
By setting up a reinforcement layer and laser engraving QR code in the FPC connection structure of the optical fingerprint module, the problem of easy damage to the soft circuit board during bending is solved, the bending resistance and service life of the module are improved, and the traceability requirements of the QR code are met.
Patent Information
- Application Number
- CN202421118175.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-21
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-05-21
AI Technical Summary
During the bending process of the soft circuit board, frictional damage is prone to the connection position, causing the soft circuit board to crack, which in turn causes the optical fingerprint module to fail and shorten the service life of the FPC board.
An optical fingerprint module FPC connection structure is designed. By setting a first reinforcement adhesive layer below the lens assembly and a second reinforcement adhesive layer above the second reinforcement plate, the bending position of the first reinforcement plate and the second reinforcement plate is protected, and a laser engraving area is set on the second reinforcement plate to realize the traceability of the QR code.
It improves the bending resistance of the FPC board, extends the service life, and avoids the reduction in the resolution of the optical fingerprint module.
Smart Images
Figure CN222621267U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of optical fingerprint module manufacturing, in particular to an optical fingerprint module FPC connection structure. Background Art
[0002] Flexible circuit boards have many advantages such as saving space, reducing weight and high flexibility. They are widely used in production and life. During the bending process of the flexible circuit board, friction damage is prone to occur at the connection position with other components, causing the flexible circuit board to crack and making the optical fingerprint module function ineffective. Therefore, it is necessary to modify the connection structure of the flexible circuit board to avoid shortening the service life of the FPC board due to bending. Utility Model Content
[0003] The purpose of the utility model is to overcome the deficiencies in the prior art and provide an optical fingerprint module FPC connection structure.
[0004] The purpose of this utility model is achieved through the following technical solutions:
[0005] An optical fingerprint module FPC connection structure comprises: an FPC board, a lens assembly and a connector, wherein the FPC board is provided with a front mounting area and a back mounting area, the lens assembly and the connector are respectively provided on the front mounting area, a first reinforcement plate and a second reinforcement plate are provided on the back mounting area, the first reinforcement plate is aligned with the lens assembly, the second reinforcement plate is aligned with the connector, a first reinforcement glue layer is provided below the lens assembly, and a second reinforcement glue layer is provided above the second reinforcement plate.
[0006] In one embodiment, the first reinforcing adhesive layer and the second reinforcing adhesive layer are naturally curing adhesive layers.
[0007] In one embodiment, the first reinforcing plate and the FPC board are connected by adhesive.
[0008] In one embodiment, the second reinforcing plate is connected to the FPC board by adhesive.
[0009] In one embodiment, the first reinforcement plate and the second reinforcement plate are arranged relatively parallel to each other.
[0010] In one embodiment, the lens assembly and the connector are electrically connected to the FPC board.
[0011] In one embodiment, a first snap-in opening and a second snap-in opening are respectively disposed on two sides of the first reinforcing plate, and the first snap-in opening and the second snap-in opening are aligned.
[0012] In one of the embodiments, a third clip is disposed below the second reinforcement plate.
[0013] In one embodiment, the first reinforcement plate and the second reinforcement plate are steel plates.
[0014] In one of the embodiments, a laser engraving area is provided on the second reinforcement plate.
[0015] Compared with the prior art, the utility model has at least the following advantages:
[0016] The utility model discloses an optical fingerprint module FPC connection structure, by arranging a first reinforcing adhesive layer below the lens assembly and a second reinforcing adhesive layer above the second reinforcing plate, so as to protect the bending positions of the first reinforcing plate and the second reinforcing plate, and avoid small-angle bending causing line damage to the line outlet position of the lens assembly and the line inlet position of the connector, thereby improving the bending resistance of the FPC board and extending the service life; a traceable QR code is laser engraved on the second reinforcing plate, which meets the QR code traceability requirements while avoiding the reduction of the resolution of the optical fingerprint module. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments are briefly introduced below.
[0018] Figure 1 This is a front view schematic diagram of an optical fingerprint module FPC connection structure in one embodiment of the utility model;
[0019] Figure 2 This is a schematic diagram of the reverse side of an optical fingerprint module FPC connection structure in one embodiment of the utility model; DETAILED DESCRIPTION
[0020] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings.
[0021] See also Figure 1 and Figure 2 The present application proposes an optical fingerprint module FPC connection structure 10, including an FPC board 100, a lens assembly 200 and a connector 300. The FPC board 100 is provided with a front mounting area 110 and a back mounting area 120. The lens assembly 200 and the connector 300 are respectively arranged on the front mounting area 110. The back mounting area 120 is provided with a first reinforcement plate 121 and a second reinforcement plate 122. The first reinforcement plate 121 is aligned with the lens assembly 200, and the second reinforcement plate 122 is aligned with the connector 300. A first reinforcement adhesive layer 210 is arranged below the lens assembly 200, and a second reinforcement adhesive layer 123 is arranged above the second reinforcement plate 122.
[0022] It should be noted that during the reliability test and assembly of the optical fingerprint module, the FPC board 100 may be bent in various ways, which may easily cause damage to the FPC board 100. In particular, when the FPC board 100 is bent, the friction at the edges of the first reinforcement plate 121 and the second reinforcement plate 122 may easily cause the FPC board 100 to crack, resulting in the rupture of the communication line and the loss of module function. Therefore, a first reinforcement glue layer 210 is provided below the lens assembly 200 and a second reinforcement glue layer 123 is provided above the second reinforcement plate 122, thereby protecting the bending positions of the first reinforcement plate 121 and the second reinforcement plate 122, and preventing small-angle bending from causing line damage to the line outlet position of the lens assembly 200 and the line inlet position of the connector 300, thereby improving the bending resistance of the FPC board 100 and extending its service life.
[0023] Please refer again Figure 1 and Figure 2 In one embodiment, the first reinforcing adhesive layer 210 and the second reinforcing adhesive layer 123 are naturally cured adhesive layers. The naturally cured adhesive has corrosion resistance and wear resistance, which further improves the protective effect of the first reinforcing adhesive layer 210 and the second reinforcing adhesive layer 123.
[0024] See also Figure 2 In one embodiment, the first reinforcing plate 121 and the FPC board 100 are connected by adhesive, and the second reinforcing plate 122 and the FPC board 100 are connected by adhesive. Such a configuration can make the first reinforcing plate 121 and the second reinforcing plate 122 more firmly arranged on the FPC board 100, avoiding the first reinforcing plate 121 and the second reinforcing plate 122 from shifting and increasing the bending range.
[0025] Please refer again Figure 1 and Figure 2 In one embodiment, the first reinforcement plate 121 and the second reinforcement plate 122 are arranged relatively parallel. Preferably, the lens assembly 200 and the connector 300 are arranged to be electrically connected with the FPC board 100, so that the optical fingerprint module FPC connection structure 10 is more compact.
[0026] Please refer again Figure 2 In one embodiment, a first snap-in 121a and a second snap-in 121b are respectively provided on both sides of the first reinforcing plate 121, the first snap-in 121a and the second snap-in 121b are aligned, and a third snap-in 122a is provided below the second reinforcing plate 122. With this arrangement, the connection between the FPC board 100 and other components is more stable.
[0027] Preferably, the first reinforcement plate 121 and the second reinforcement plate 122 are steel plates.
[0028] Please refer again Figure 2, a laser engraving area 124 is set on the second reinforcement plate.
[0029] It should be noted that in order to facilitate the later data analysis and defect tracing of the optical fingerprint module, it is necessary to laser engrave a traceable QR code on the FPC connection structure 10 of the optical fingerprint module. During the laser engraving process, high temperature is generated, which can easily cause deformation of the reinforcing steel plate, causing the center position to bulge and a 10um to 15um warping of the center relative to the four corners. If the QR code is laser engraved on the first reinforcing plate 121, according to the normal production process parameter requirements, the distance between the lens center of the produced optical fingerprint module and the chip is simultaneously shortened by 10um to 15um, resulting in a decrease in the resolution of the optical fingerprint module and 20% to 30% defect loss. Therefore, a laser engraving area 124 is set on the second reinforcing plate 122, and a QR code is laser engraved on the laser engraving area 124. While meeting the QR code traceability requirements, the decrease in the resolution of the optical fingerprint module is avoided.
[0030] 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. An optical fingerprint module FPC connection structure, characterized in that: include: An FPC board, a lens assembly and a connector, wherein the FPC board is provided with a front mounting area and a back mounting area, the lens assembly and the connector are respectively provided on the front mounting area, a first reinforcement plate and a second reinforcement plate are provided on the back mounting area, the first reinforcement plate is aligned with the lens assembly, the second reinforcement plate is aligned with the connector, a first reinforcement adhesive layer is provided below the lens assembly, and a second reinforcement adhesive layer is provided above the second reinforcement plate.
2. The optical fingerprint module FPC connection structure according to claim 1, characterized in that: The first reinforcing adhesive layer and the second reinforcing adhesive layer are naturally curing adhesive layers.
3. The optical fingerprint module FPC connection structure according to claim 1, characterized in that: The first reinforcing plate and the FPC plate are connected by adhesive.
4. The optical fingerprint module FPC connection structure according to claim 1, characterized in that: The second reinforcing plate is connected to the FPC board by using adhesive.
5. The optical fingerprint module FPC connection structure according to claim 1, characterized in that: The first reinforcing plate and the second reinforcing plate are arranged relatively parallel to each other.
6. The optical fingerprint module FPC connection structure according to claim 1, characterized in that: The lens assembly and the connector are electrically connected to the FPC board.
7. The optical fingerprint module FPC connection structure according to claim 1, characterized in that: A first bayonet and a second bayonet are respectively arranged on two sides of the first reinforcing plate, and the first bayonet and the second bayonet are aligned.
8. The optical fingerprint module FPC connection structure according to claim 1, characterized in that: A third clip is disposed below the second reinforcement plate.
9. The optical fingerprint module FPC connection structure according to claim 1, characterized in that: The first reinforcing plate and the second reinforcing plate are steel plates.
10. The optical fingerprint module FPC connection structure according to claim 1, characterized in that: A laser engraving area is arranged on the second reinforcing plate.