Voice coil motor flexible circuit board of covering film rear windowing process

Abstract

The utility model discloses a voice coil motor flexible circuit board adopting a covering film rear windowing process, which comprises a voice coil motor flexible circuit board body. The voice coil motor flexible circuit board body comprises two groups of golden finger ends, an AF coil driving module, an AF end sensor module, an AF coil module, two groups of OIS coil modules, two groups of OIS coil driving modules and two groups of OIS end sensor modules, and the two groups of golden finger ends are composed of 13 high-precision golden fingers in total. The group with more golden fingers in the two groups of golden finger ends is close to the positions of the AF coil driving module, the AF end sensor module and the AF coil module, and the golden finger ends are connected with the mainboard end through welding. The voice coil motor flexible circuit board of the covering film rear windowing technology satisfies strict requirements of small volume and high assembly precision of a voice coil motor, and realizes automatic optical focusing and optical anti-vibration functions by changing the focal length of a lens through changing the current of the coil.

Description

Technical Field

[0001] The utility model relates to the technical field of voice coil motor flexible circuit boards, in particular to a voice coil motor flexible circuit board with a cover film and rear window opening process. Background Art

[0002] A voice coil motor is a type of motor. Because its principle is similar to that of a speaker, it is also called a voice coil motor. It is a device that converts electrical energy into mechanical energy and achieves linear and limited swing angle motion.

[0003] With the rapid development of smart phones, people have higher and higher requirements for the pixel quality of mobile phones. Cameras have evolved from single-head to multi-cameras, while also providing users with better camera and visual experience.

[0004] The tolerance of the pad position in the traditional cover film window opening method is ±0.15MM, which cannot meet the high-precision requirements of the voice coil motor, and also needs to cater to the preferences of digital enthusiasts and achieve mass production. To solve the above problems, we proposed a voice coil motor flexible circuit board with a cover film post-window opening process. Utility Model Content

[0005] The main purpose of the utility model is to provide a voice coil motor flexible circuit board with a cover film and rear window opening process, which can effectively solve the problems in the background technology.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A voice coil motor flexible circuit board with a cover film rear window opening process, comprising a voice coil motor flexible circuit board body, the voice coil motor flexible circuit board body comprising two groups of gold finger ends, an AF coil drive module, an AF end sensor module, an AF coil module, two groups of OIS coil modules, two groups of OIS coil drive modules, and two groups of OIS end sensor modules, the two groups of gold finger ends are composed of a total of 13 high-precision gold fingers, the group with more gold fingers in the two groups of gold finger ends is close to the positions of the AF coil drive module, the AF end sensor module, and the AF coil module, and the gold finger ends are connected to the mainboard end by welding.

[0008] Preferably, the AF coil driving module is installed by means of a patch, the AF coil driving module is electrically connected to the AF end sensor module, and the AF coil driving module is electrically connected to the AF coil module.

[0009] Preferably, the AF end sensor module is installed by means of a patch.

[0010] Preferably, the AF coil module is installed by means of a patch, and the AF coil module matches the permanent magnet at the lens end.

[0011] Preferably, the OIS coil module is installed by means of a patch, the OIS coil module is matched with the permanent magnet at the lens end, and the OIS coil module is electrically connected to the OIS coil driving module.

[0012] Preferably, the OIS coil driving module is installed by means of a patch, and the OIS coil driving module is electrically connected to the OIS end sensor module.

[0013] Preferably, the OIS end sensor module is installed by means of a patch.

[0014] Compared with the prior art, the utility model has the following beneficial effects: the voice coil motor flexible circuit board with a covering film post-windowing process solves the inherent glue overflow nature of covering film pasting and lamination, achieves zero glue overflow of the covering film, and greatly improves the quality of the patch. By changing the voice coil motor window opening process and processing method design, and using covering film pasting and lamination material laser windowing, the pad position accuracy of the voice coil motor after production can be achieved to ±0.05MM, meeting the strict requirements of the voice coil motor for small size and high assembly accuracy. By changing the current of the coil to change the position of the lens and the focal length of the lens, the functions of automatic optical focusing and optical image stabilization are realized, and mass production is fully realized, fully ensuring the quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of a voice coil motor flexible circuit board with a cover film and rear window opening process according to the utility model;

[0016] Figure 2 It is a partial structural schematic diagram of a voice coil motor flexible circuit board with a cover film and rear window opening process of the utility model;

[0017] Figure 3 This is a partial structural schematic diagram of a voice coil motor flexible circuit board with a cover film and rear window opening process according to the utility model.

[0018] In the figure: 1. Gold finger end; 2. AF coil drive module; 3. AF end sensor module; 4. AF coil module; 5. OIS coil module; 6. OIS coil drive module; 7. OIS end sensor module; 8. Voice coil motor flexible circuit board body. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0020] like Figure 1-3As shown, a voice coil motor flexible circuit board with a cover film and rear window opening process includes a voice coil motor flexible circuit board body 8, and the voice coil motor flexible circuit board body 8 includes two groups of gold finger ends 1, an AF coil drive module 2, an AF end sensor module 3, an AF coil module 4, two groups of OIS coil modules 5, two groups of OIS coil drive modules 6, and two groups of OIS end sensor modules 7. The two groups of gold finger ends 1 are composed of a total of 13 high-precision gold fingers of ±0.05. The group with more gold fingers in the two groups of gold finger ends 1 is close to the positions of the AF coil drive module 2, the AF end sensor module 3, and the AF coil module 4. The gold finger end 1 is connected to the main board end by welding, and transmits signals to the photosensitive end of the substrate.

[0021] In this embodiment, the AF coil driving module 2 mounts the AF driving IC by means of a patch, the AF coil driving module 2 is electrically connected to the AF end sensor module 3 , and the AF coil driving module 2 is electrically connected to the AF coil module 4 .

[0022] Specifically, the AF coil driving module 2 is composed of two ±0.05 high-precision pads, receives information from the substrate photosensitive end or the AF end sensor module 3, processes the information, and converts the processed information into an analog signal to feed back to the AF coil module 4.

[0023] In this embodiment, the AF end sensor module 3 installs the sensor by means of a patch.

[0024] Specifically, the AF end sensor module 3 is composed of two ±0.05 high-precision pads, detects the position of the lens through the sensor, and feeds back the detected position information to the AF coil driving module 2.

[0025] In this embodiment, the AF coil module 4 is mounted on the AF coil by means of a patch, and the AF coil module 4 matches the permanent magnet at the lens end.

[0026] Specifically, the AF coil module 4 is composed of two ±0.05 high-precision pads, and changes the position of the lens by receiving the analog signal from the AF coil driving module 2 and changing the current of the coil.

[0027] In this embodiment, the OIS coil module 5 installs the OIS coil by means of a patch, the OIS coil module 5 matches the permanent magnet at the lens end, and the OIS coil module 5 is electrically connected to the OIS coil driving module 6 .

[0028] Specifically, the two groups of OIS coil modules 5 are respectively composed of two ±0.05 high-precision pads, and the position of the lens is changed by changing the current of the coil by receiving the analog signal of the OIS coil driving module 6.

[0029] In this embodiment, the OIS coil driving module 6 is installed in a patch manner, and the OIS coil driving module 6 is electrically connected to the OIS end sensor module 7 .

[0030] Specifically, the two groups of OIS coil driving modules 6 are respectively composed of two ±0.05 high-precision pads, which receive information from the substrate photosensitive end or the OIS end sensor module 7, and convert the processed information into analog signals to feed back to the OIS coil module 5.

[0031] In this embodiment, the OIS end sensor module 7 installs the sensor by means of a patch.

[0032] Specifically, the two groups of OIS end sensor modules 7 are respectively composed of two ±0.05 high-precision pads, which detect the position of the lens through the sensor and feed back the position information to the OIS coil driving module 6.

[0033] It should be noted that the utility model is a voice coil motor flexible circuit board with a covering film and rear window opening process. The working principle is: after the AF end sensor module 3 detects the position of the lens, the position information is fed back to the AF coil driving module 2. The 13 high-precision gold fingers are welded to the main board end and transmit signals to the photosensitive end of the substrate. After the AF coil driving module 2 receives the transmission information from the photosensitive end of the substrate or the AF end sensor module 3, the information is processed and converted into an analog signal to feed back to the AF coil module 4, and the current of the coil is changed to change the position of the lens to realize the function of automatic optical focusing. After the OIS end sensor module 7 detects the position of the lens, the position information is fed back to the OIS coil driving module 6. The OIS coil driving module 6 receives the information from the OIS end sensor module 7 and processes and converts it, converts it into an analog signal and then feeds it back to the OIS coil module 5. After receiving the analog signal from the OIS coil driving module 6, the OIS coil module 5 changes the current of the coil to change the position of the lens to realize the function of optical image stabilization.

[0034] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A voice coil motor flexible circuit board with a cover film and a rear window opening process, comprising a voice coil motor flexible circuit board body (8), characterized in that: The voice coil motor flexible circuit board body (8) comprises two groups of gold finger ends (1), an AF coil drive module (2), an AF end sensor module (3), an AF coil module (4), two groups of OIS coil modules (5), two groups of OIS coil drive modules (6), and two groups of OIS end sensor modules (7). The two groups of gold finger ends (1) are composed of a total of 13 high-precision gold fingers. The group with more gold fingers in the two groups of gold finger ends (1) is close to the position of the AF coil drive module (2), the AF end sensor module (3), and the AF coil module (4). The gold finger ends (1) are connected to the main board end by welding.

2. The voice coil motor flexible circuit board with cover film and rear window opening process according to claim 1, characterized in that: The AF coil driving module (2) is installed by means of a patch, the AF coil driving module (2) is electrically connected to the AF end sensor module (3), and the AF coil driving module (2) is electrically connected to the AF coil module (4).

3. The voice coil motor flexible circuit board with cover film and rear window opening process according to claim 1, characterized in that: The AF end sensor module (3) is installed by means of a patch.

4. The voice coil motor flexible circuit board with cover film and rear window opening process according to claim 1, characterized in that: The AF coil module (4) is installed by means of a patch, and the AF coil module (4) is matched with the permanent magnet at the lens end.

5. The voice coil motor flexible circuit board with cover film and rear window opening process according to claim 1, characterized in that: The OIS coil module (5) is installed by means of a patch, the OIS coil module (5) is matched with the permanent magnet at the lens end, and the OIS coil module (5) is electrically connected to the OIS coil driving module (6).

6. The voice coil motor flexible circuit board with cover film and rear window opening process according to claim 1, characterized in that: The OIS coil driving module (6) is installed by means of a patch, and the OIS coil driving module (6) is electrically connected to the OIS end sensor module (7).

7. The voice coil motor flexible circuit board with cover film and rear window opening process according to claim 1, characterized in that: The OIS end sensor module (7) is installed by means of a patch.

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