CN109922241B - Method for assembling camera modules for batch underscreen recognition device - Google Patents
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- CN109922241B CN109922241B CN201910180978.3A CN201910180978A CN109922241B CN 109922241 B CN109922241 B CN 109922241B CN 201910180978 A CN201910180978 A CN 201910180978A CN 109922241 B CN109922241 B CN 109922241B
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Abstract
The invention provides a method for assembling camera modules for batch underscreen recognition devices, which comprises the following steps: step 1, taking one of the camera modules for the batch underscreen identification device as a reference camera module; step 2, acquiring a relation curve between the MTF value and the lens screwing value of the reference camera module; step 3, acquiring a reference lens screwing value interval according to the relation curve; and 4, screwing the lens of the camera module for the residual underscreen recognition device into the corresponding lens carrier, and enabling the lens screwing value to fall within the reference lens screwing value interval. According to the method for assembling the camera modules for the batch underscreen recognition device, the relationship curve of the MTF value and the lens screwing value is obtained firstly, the lens screwing value is directly controlled to fall in the reference lens screwing value interval during assembly, and assembly and focusing can be synchronously realized, so that the production efficiency is effectively accelerated, and the product quality is effectively improved.
Description
Technical Field
The invention relates to the technical field of camera shooting, in particular to a method for assembling camera modules for batch underscreen recognition devices.
Background
With the rapid development of the consumer electronics industry, the application of the biometric identification technology is more and more extensive and novel. Convenient and quick biological identification also becomes more and more important in the life of people; the application of the under-screen fingerprint identification technology is more in line with the application of the fingerprint identification technology. The existing under-screen recognition device is generally provided with a camera module, the size of the camera module applied to the under-screen recognition device can be designed to be smaller due to the application arrangement requirement, the camera module is installed firstly according to the conventional assembly process of the camera module, and then the lens is rotated to focus after the installation is completed. Need rotate the camera lens many times like this, cause the fish tail of camera lens easily, and every camera module all need install and the focusing process, and production efficiency is low, is unfavorable for batch production.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for assembling camera modules for batch underscreen identification devices, which can improve the assembly efficiency and ensure the product quality.
In order to solve the technical problem, the invention provides a method for assembling camera modules for batch underscreen recognition devices, which comprises the following steps:
step 2, acquiring a relation curve between the MTF value and the lens screwing value of the reference camera module;
step 3, acquiring a reference lens screwing value interval according to the relation curve;
and 4, screwing the lens of the camera module for the residual underscreen recognition device into the corresponding lens carrier, and enabling the lens screwing value to fall within the reference lens screwing value interval.
As a preferable aspect of the present invention, the step 2 includes:
gradually screwing the lens of the reference camera module into the lens carrier;
recording the corresponding MTF value under each lens screwing value;
and drawing a relation curve of the MTF value and the lens rotation value.
As a preferable aspect of the present invention, the step 3 includes:
acquiring a lens screw-in value corresponding to the maximum MTF value in the relation curve as a first lens screw-in value;
calculating a second MTF value according to the maximum MTF value and a preset percentage;
acquiring a lens screw-in value corresponding to the second MTF value and positioned on the right side of the first lens screw-in value as a second lens screw-in value;
and taking a section formed by the first lens screwing value and the second lens screwing value as a reference lens screwing value section.
As a preferable aspect of the present invention, the preset percentage is 92%.
As a preferred aspect of the present invention, the lens rotation value is represented by a distance from an upper surface of the lens to a bottom of the lens carrier.
As a preferred embodiment of the present invention, in the step 4, the lens rotation value is monitored in real time by configuring a height sensor, so that the lens rotation value falls within the reference lens rotation value interval.
As a preferable scheme of the present invention, in the step 4, the lens rotation value is controlled to fall within the reference lens rotation value range by controlling the rotation number of the lens.
As a preferable scheme of the present invention, before the step 4, the method further includes acquiring a reference screwing-in circle number interval according to the reference lens screwing-in value interval.
The invention has the following technical effects: according to the method for assembling the camera modules for the batch underscreen identification devices, the relation curve of the MTF value and the lens screw-in value is obtained through one reference camera module, so that the reference lens screw-in value interval of the camera module for the underscreen identification devices is effectively obtained according to the relation curve, and in the assembling process of the camera modules for the residual underscreen identification devices, the assembling and focusing can be synchronously realized only by directly controlling the lens screw-in value to fall in the reference lens screw-in value interval during assembling, so that the production efficiency is effectively accelerated, meanwhile, the focusing process of each camera module for the underscreen identification devices is effectively avoided, the abrasion of the camera modules for the batch underscreen identification devices is reduced, and the product quality is effectively improved.
Drawings
FIG. 1 is a block flow diagram of a method for assembling a batch of camera modules for an underscreen identification device in accordance with the present invention;
fig. 2 is a schematic diagram of a relationship curve between an MTF value and a lens rotation value according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention are described in further detail below with reference to the accompanying drawings. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. In the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms may be understood by those skilled in the art according to specific circumstances.
Fig. 1 illustrates a method for assembling a batch camera module for an underscreen identification device according to an embodiment of the present invention. The method for assembling the camera modules for the batch underscreen identification device specifically comprises the following steps:
step 2, acquiring a relation curve between the MTF value and the lens screwing value of the reference camera module;
step 3, acquiring a reference lens screwing value interval according to the relation curve;
and 4, screwing the lens of the camera module for the residual underscreen recognition device into the corresponding lens carrier, and enabling the lens screwing value to fall within the reference lens screwing value interval.
Therefore, the method for assembling the camera modules for the batch underscreen identification device, provided by the invention, firstly obtains a relation curve of MTF values and lens screwing values through one reference camera module, so that a reference lens screwing value interval of the camera module for the underscreen identification device is effectively obtained according to the relation curve, and the focusing effect can be simultaneously realized by ensuring that the lens screwing value falls in the reference lens screwing value interval; therefore, in the assembling process of the camera module for the residual underscreen identification device, the camera lens screw-in value is directly controlled to fall within the range of the reference camera lens screw-in value only during assembling, assembling and focusing can be synchronously realized, the production efficiency is effectively accelerated, the focusing process of each camera module for the underscreen identification device is effectively avoided after assembling, the abrasion of the camera module for the underscreen identification device is reduced, and the product quality is effectively improved.
More specifically, in this embodiment, the step 2 includes: gradually screwing the lens of the reference camera module into the lens carrier; recording the corresponding MTF value under each lens screwing value; and drawing a relation curve of the MTF value and the lens rotation value. Therefore, the relationship curve between the MTF value and the lens screwing value, which can be suitable for the whole batch of camera modules for the underscreen identification device, can be accurately and effectively acquired, and the acquired reference lens screwing value interval can also be effectively suitable for the whole batch of camera modules for the underscreen identification device.
More specifically, in this embodiment, the step 3 includes: acquiring a lens screw-in value corresponding to the maximum MTF value in the relation curve as a first lens screw-in value; calculating a second MTF value according to the maximum MTF value and a preset percentage; acquiring a lens screw-in value corresponding to the second MTF value and positioned on the right side of the first lens screw-in value as a second lens screw-in value; and taking a section formed by the first lens screwing value and the second lens screwing value as a reference lens screwing value section.
As shown in fig. 2, in the drawing, the abscissa D axis is used to represent the lens rotation value, the ordinate MTF axis is used to represent the MTF value, after the relationship curve between the MTF value of the reference camera module and the lens rotation value is obtained, the point corresponding to the maximum MTF value, that is, the vertex B of the relationship curve represents the clearest point of the camera module, and the lens rotation value corresponding to the maximum MTF value obtained at this time is used as the first lens rotation value D1Is an ideal lens screw-in value, and is used for batch screen identification devices due to the existence of uncontrollable factors such as process errors and the like in the actual production processEach camera module in the camera modules has certain fluctuation with the lens screw-in value corresponding to the maximum MTF value, and meanwhile, each lens screw-in value can hardly guarantee to be capable of being matched with the first lens screw-in value D in the actual screw-in process1And completely corresponds. Thus setting a second lens rotation value D2Rotating the first lens by the value D1And a second lens screw-in value D2The formed interval is used as a reference lens screwing value interval, so that the lens screwing value falls into the reference lens screwing value interval, on one hand, the process can be effectively simplified, and on the other hand, the focusing effect of each camera module for the batch underscreen identification device can be effectively ensured. More specifically, a second MTF value is calculated according to the maximum MTF value and a preset percentage, the second MTF value corresponds to two lens rotation values, and for example, a point a and a point C in the figure each correspond to one lens rotation value2The screw-in value D is positioned on the first lens1Can have a better focusing effect, namely the lens screwing value corresponding to the point C is taken as the second lens screwing value D2. More specifically, in this embodiment, the preset percentage is preferably 92%, which can achieve the effects of simplifying the process and ensuring the focusing effect.
Preferably, the lens rotation value is represented by the distance from the upper surface of the lens to the bottom of the lens carrier. More specifically, in the present embodiment, the step 4 is implemented by configuring the height sensor to monitor the lens rotation value in real time, so that the lens rotation value falls within the reference lens rotation value interval. After the reference lens screwing value interval is acquired, for the assembly of the camera modules for the residual underscreen identification devices, the lens screwing value is monitored in real time only through the height sensor in the process of screwing the lens into the corresponding lens carrier, and therefore the assembly is stopped when the lens screwing value falls into the reference lens screwing value interval. More specifically, the height sensor may monitor the lens rotation value by reading the rotation height of the lens, and since the sizes of the lens and the carrier are known, the lens rotation value can be easily obtained after the height sensor is disposed, which is a content of the prior art and will not be described in detail herein.
In another embodiment, the lens rotation value can be controlled to fall within the reference lens rotation value interval, specifically, after the reference lens rotation value interval formed by the first lens rotation value and the second lens rotation value is obtained, the rotation numbers of the lens corresponding to the first lens rotation value and the second lens rotation value can be converted, so as to obtain a first rotation number corresponding to the first lens rotation value and a second rotation number corresponding to the second lens rotation value, and then obtain the reference rotation number interval, so that during the assembly process of the camera module for the residual underscreen recognition device, it is only required to ensure that the rotation numbers of the lens are between the first rotation number and the second rotation number.
The above-mentioned embodiments only express the embodiments of the present invention, and the description is more specific and detailed, but not understood as the limitation of the patent scope of the present invention, but all the technical solutions obtained by using the equivalent substitution or the equivalent transformation should fall within the protection scope of the present invention.
Claims (6)
1. A method for assembling camera modules for batch underscreen recognition devices is characterized by comprising the following steps:
step 1, taking one of the camera modules for the batch underscreen identification device as a reference camera module;
step 2, obtaining a relation curve of an MTF value and a lens screwing value of the reference camera module, wherein the lens screwing value is represented by the distance from the upper surface of the lens to the bottom of the lens carrier;
step 3, acquiring a lens screw-in value corresponding to the maximum MTF value in the relation curve as a first lens screw-in value;
calculating a second MTF value according to the maximum MTF value and a preset percentage;
acquiring a lens screw-in value corresponding to the second MTF value and positioned on the right side of the first lens screw-in value as a second lens screw-in value;
taking a section formed by the first lens screwing value and the second lens screwing value as a reference lens screwing value section;
and 4, screwing the lens of the camera module for the residual underscreen recognition device into the corresponding lens carrier, and enabling the lens screwing value to fall within the reference lens screwing value interval.
2. The method of assembling batches of camera modules for underscreen identification devices as claimed in claim 1, wherein said step 2 comprises:
gradually screwing the lens of the reference camera module into the lens carrier;
recording the corresponding MTF value under each lens screwing value;
and drawing a relation curve of the MTF value and the lens rotation value.
3. The method of assembling batches of camera modules for an underscreen identification device as claimed in claim 1, wherein the predetermined percentage is 92%.
4. The method for assembling camera modules for batch underscreen identification devices as claimed in claim 1, wherein said step 4 is implemented by monitoring the lens rotation value in real time by configuring the height sensor so that the lens rotation value falls within said reference lens rotation value interval.
5. The method for assembling the camera modules for the batch of underscreen identification devices as claimed in claim 1, wherein the step 4 is implemented by controlling the number of the lens screwing turns so that the lens screwing value falls within the reference lens screwing value interval.
6. The method for assembling the camera modules for the batch of underscreen identification devices as claimed in claim 5, further comprising obtaining a reference rotation number interval according to the reference lens rotation value interval before the step 4.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101064773A (en) * | 2006-04-26 | 2007-10-31 | 杭州草莓资讯有限公司 | Multi-lens scene synthesis digital camera system and method |
| CN108319885A (en) * | 2017-01-17 | 2018-07-24 | 北京小米移动软件有限公司 | Fingerprint identification method and device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2000346745A (en) * | 1999-06-08 | 2000-12-15 | Mitsubishi Rayon Co Ltd | Method and device for measuring mtf of two-dimensional array lens array |
| CN102662293B (en) * | 2012-05-21 | 2015-06-24 | 信利光电股份有限公司 | Close-range focusing device and method |
| CN103702035B (en) * | 2014-01-14 | 2017-01-04 | 昆山丘钛微电子科技有限公司 | Photographic head module quickly regulating method based on FOV |
| CN204925488U (en) * | 2015-09-06 | 2015-12-30 | 南昌欧菲光电技术有限公司 | Camera module |
| CN205003641U (en) * | 2015-09-09 | 2016-01-27 | 宁波舜宇光电信息有限公司 | A module of making a video recording for optics touch -sensitive screen and camera lens thereof |
| CN106501917B (en) * | 2016-12-07 | 2019-12-27 | 歌尔科技有限公司 | Lens auxiliary focusing method and device |
| CN107147907B (en) * | 2017-06-26 | 2019-02-15 | 信利光电股份有限公司 | A kind of detection method of camera module |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101064773A (en) * | 2006-04-26 | 2007-10-31 | 杭州草莓资讯有限公司 | Multi-lens scene synthesis digital camera system and method |
| CN108319885A (en) * | 2017-01-17 | 2018-07-24 | 北京小米移动软件有限公司 | Fingerprint identification method and device |
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