CN112153271B - Control method and control device for optical lens of electronic equipment and storage medium - Google Patents
Control method and control device for optical lens of electronic equipment and storage medium Download PDFInfo
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- CN112153271B CN112153271B CN201910570467.2A CN201910570467A CN112153271B CN 112153271 B CN112153271 B CN 112153271B CN 201910570467 A CN201910570467 A CN 201910570467A CN 112153271 B CN112153271 B CN 112153271B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/67—Focus control based on electronic image sensor signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/67—Focus control based on electronic image sensor signals
- H04N23/671—Focus control based on electronic image sensor signals in combination with active ranging signals, e.g. using light or sound signals emitted toward objects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/69—Control of means for changing angle of the field of view, e.g. optical zoom objectives or electronic zooming
Abstract
The invention discloses a control method and a control device for an optical lens of electronic equipment and a storage medium. The method comprises the following steps: receiving a first instruction; the first instruction is used for instructing to switch the zoom multiple of an optical lens of the electronic equipment from a first zoom multiple to a second zoom multiple; measuring the moving distance of the optical lens by using a first sensor in response to a first instruction; controlling the optical lens to move from the current position to a first position in a target focusing stroke by using the measured distance and a first step length corresponding to the first sensor; measuring the moving distance of the optical lens by using a second sensor; controlling the optical lens to move from the first position to the target position by using the measured distance and a second step length corresponding to the second sensor so as to change the zooming multiple of the optical lens and enable the image quality acquired by the optical lens to meet the preset condition; wherein the measurement parameters of the first sensor and the second sensor are different; the first step size is greater than the second step size.
Description
Technical Field
The present invention relates to terminal technologies, and in particular, to a method and an apparatus for controlling an optical lens of an electronic device, and a storage medium.
Background
Currently, with the continuous development of terminal technology and optical technology, a user can use an optical lens of an electronic device to shoot an object and shoot a clear image by changing the focal length of the optical lens. Usually, the focal length of the optical lens may be adjusted in an optical zoom manner, but due to poor adjustment precision, the optical lens may not be focused accurately, so that a captured image is blurred, and user experience is reduced.
Disclosure of Invention
In view of the above, embodiments of the present invention provide a method and an apparatus for controlling an optical lens of an electronic device, and a storage medium.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the embodiment of the invention provides a control method of an optical lens of electronic equipment, which comprises the following steps:
receiving a first instruction; the first instruction is used for instructing to switch the zoom multiple of an optical lens of the electronic equipment from a first zoom multiple to a second zoom multiple;
measuring a distance moved by the optical lens with a first sensor in response to the first instruction; controlling the optical lens to move from the current position to a first position in a target focusing stroke by using the measured distance and a first step length corresponding to the first sensor;
measuring a distance moved by the optical lens with a second sensor; controlling the optical lens to move from the first position to a target position by using the measured distance and a second step length corresponding to the second sensor so as to change the zoom multiple of the optical lens, so that the image quality acquired by the optical lens meets a preset condition; wherein the measurement parameters of the first sensor and the second sensor are different; the first step size is greater than the second step size.
In the foregoing solution, the control method further includes:
determining a distance that the optical lens moves from a current position to a target position;
determining the first sensor and the second sensor using the distance.
In the foregoing solution, the control method further includes:
determining a target focusing stroke corresponding to the second zooming multiple by utilizing the corresponding relation between the zooming multiple and the focusing stroke;
and determining the second step length based on the target focusing stroke.
In the foregoing solution, the control method further includes:
determining the maximum focusing stroke of the optical lens;
determining the first step size based on the maximum focus stroke.
In the foregoing solution, the control method further includes:
determining a first focus stroke of the optical lens; the first focusing stroke is larger than the target focusing stroke;
determining the first step size based on the first focus stroke.
An embodiment of the present invention provides a control device for an optical lens of an electronic device, including:
a receiving unit for receiving a first instruction; the first instruction is used for instructing to switch the zoom multiple of an optical lens of the electronic equipment from a first zoom multiple to a second zoom multiple;
the control unit is used for responding to the first instruction and measuring the moving distance of the optical lens by using a first sensor; controlling the optical lens to move from the current position to a first position in a target focusing stroke by using the measured distance and a first step length corresponding to the first sensor; and measuring a distance moved by the optical lens with a second sensor; controlling the optical lens to move from the first position to a target position by using the measured distance and a second step length corresponding to the second sensor so as to change the zoom multiple of the optical lens, so that the image quality acquired by the optical lens meets a preset condition; wherein the measurement parameters of the first sensor and the second sensor are different; the first step size is greater than the second step size.
In the above solution, the control unit is further configured to determine a distance that the optical lens moves from the current position to the target position; determining the first sensor and the second sensor using the distance.
In the above solution, the control unit is further configured to determine a target focusing stroke corresponding to the second zoom factor by using a corresponding relationship between the zoom factor and the focusing stroke; and determining the second step size based on the target focusing stroke.
In the above solution, the control unit is further configured to determine a maximum focusing stroke of the optical lens; determining the first step size based on the maximum focus stroke.
In the above scheme, the control unit is further configured to determine a first focus stroke of the optical lens; the first focusing stroke is larger than the target focusing stroke; determining the first step size based on the first focus stroke.
An embodiment of the present invention provides a control apparatus for an optical lens of an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the steps of the method for controlling an optical lens of any one of the electronic devices when executing the program.
An embodiment of the present invention provides a computer storage medium, on which computer instructions are stored, where the instructions are executed by a processor to implement the steps of the method for controlling an optical lens of an electronic device as claimed in any one of the above.
The control method, the control device and the storage medium of the optical lens of the electronic equipment provided by the embodiment of the invention receive a first instruction; the first instruction is used for instructing to switch the zoom multiple of an optical lens of the electronic equipment from a first zoom multiple to a second zoom multiple; measuring a distance moved by the optical lens with a first sensor in response to the first instruction; controlling the optical lens to move from the current position to a first position in a target focusing stroke by using the measured distance and a first step length corresponding to the first sensor; measuring a distance moved by the optical lens with a second sensor; controlling the optical lens to move from the first position to a target position by using the measured distance and a second step length corresponding to the second sensor so as to change the zoom multiple of the optical lens, so that the image quality acquired by the optical lens meets a preset condition; wherein the measurement parameters of the first sensor and the second sensor are different; the first step size is greater than the second step size. By adopting the technical scheme provided by the embodiment of the invention, the moving distance of the optical lens can be detected by using two sensors with different measurement parameters, and the optical lens is controlled to move from the current position to the target position by using different step lengths, so that the accurate adjustment of the focal length of the optical lens can be realized under the condition of not increasing the effective bit number of the driving chip, and the optical lens can acquire clearer images, thereby being beneficial to improving the user experience.
Drawings
FIG. 1 is a schematic diagram illustrating an implementation process of optical focusing in the related art;
FIG. 2 is a parameter diagram of a driving chip in the related art;
FIG. 3 is a flowchart illustrating a method for controlling an optical lens of an electronic device according to an embodiment of the invention;
FIG. 4 is a schematic diagram of at least two sensors included in an electronic device according to an embodiment of the invention;
FIG. 5 is a schematic diagram of three lens groups with different structures according to an embodiment of the present invention;
FIGS. 6a and 6b are schematic diagrams illustrating the control of the movement of an optical lens according to an embodiment of the present invention;
FIG. 7 is a first schematic diagram illustrating a first exemplary configuration of a control apparatus for an optical lens of an electronic device according to an embodiment of the present invention;
fig. 8 is a second schematic structural diagram of a control device of an optical lens of an electronic apparatus according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
In the related art, a user may photograph an object using an optical lens of an electronic device and photograph a clear image by changing a focal length of the optical lens. In general, the focal length of an optical lens can be adjusted by means of optical zooming. Fig. 1 is a schematic diagram illustrating an implementation principle of optical focusing in the related art, as shown in fig. 1, a sensor is fixed on an imaging module (not shown in fig. 1) of an optical lens, and a magnet is fixed on the optical lens, so that when an instruction indicating to adjust a zoom multiple of the optical lens to 5 times optical zoom is received, a controller of an electronic device can control the optical lens to move; in the moving process of the optical lens, the sensor can detect the distance between the imaging component and the optical lens based on the magnetoelectric effect between the sensor and the magnet, and converts the detected distance into an analog voltage value; quantizing the analog voltage value output by the sensor through the driving chip to obtain a digital voltage value, and sending the quantized digital voltage value to the controller so that the controller can control the moving distance of the optical lens by using the current position of the optical lens, thereby realizing the adjustment of the focal length; the sensor may be a magnetic induction sensor, and specifically may be a hall sensor.
In the above mode, in the moving process of the optical lens, the farther the distance between the magnet and the sensor is, the smaller the analog voltage value output by the sensor is; the closer the distance between the magnet and the sensor, the larger the analog voltage value output by the sensor. The analog voltage value output by the sensor can be measured by the driving chipAs can be seen from FIG. 2, the effective bit number of the driving chip is 10 bits, so that 2 bits can be obtained101024 quantized values. Assuming that 1024 quantization values are used to quantize the analog voltage value corresponding to the distance between the magnet and the sensor, and the maximum distance between the magnet and the sensor is equal to the maximum focusing stroke of the optical lens as 4000um, the ratio of 4000um to 1024 can be used to obtain the measurement accuracy of the sensor as 4000um ÷ 1024 ≈ 4um, that is, the minimum distance that the sensor can detect the movement of the optical lens is approximately 4 um. It can be seen that the measurement accuracy of the sensor is low, and the measurement accuracy of 1um cannot be realized, so that the optical lens may not realize accurate focusing, and further, the shot image is blurred, and the user experience is affected.
Based on this, an embodiment of the present invention provides a method for controlling an optical lens of an electronic device, where the method includes: receiving a first instruction; the first instruction is used for instructing to switch the zoom multiple of an optical lens of the electronic equipment from a first zoom multiple to a second zoom multiple; measuring a distance moved by the optical lens with a first sensor in response to the first instruction; controlling the optical lens to move from the current position to a first position in a target focusing stroke by using the measured distance and a first step length corresponding to the first sensor; measuring a distance moved by the optical lens with a second sensor; controlling the optical lens to move from the first position to a target position by using the measured distance and a second step length corresponding to the second sensor so as to change the zoom multiple of the optical lens, so that the image quality acquired by the optical lens meets a preset condition; wherein the measurement parameters of the first sensor and the second sensor are different; the first step size is greater than the second step size.
Fig. 3 is a schematic flow chart illustrating an implementation of a method for controlling an optical lens of an electronic device according to an embodiment of the present invention; as shown in fig. 3, the control method includes:
step 301: receiving a first instruction; the first instruction is used for instructing to switch the zoom multiple of the optical lens of the electronic equipment from the first zoom multiple to the second zoom multiple.
The electronic device may be a mobile terminal or the like; the optical lens may be a lens supporting zooming, and may specifically be an automatic zoom lens, an automatic aperture electric zoom lens, or the like.
Here, the electronic device may determine whether the first instruction is received through a zoom multiple input by a user on a display interface, and specifically, when the zoom multiple input by the user on the display interface is received, determine that the first instruction is received; or, the electronic device may determine whether the first instruction is received by detecting a touch operation of a user on a zoom multiple displayed on a display interface, and specifically, determine that the first instruction is received when the touch operation is detected.
In practical application, in consideration of the fact that compared with a mode that one sensor is used for detecting the moving distance of the optical lens in the maximum focusing stroke, the plurality of sensors are used for detecting the moving distance of the optical lens in the maximum focusing stroke, the minimum distance of the sensor for detecting the moving distance of the optical lens can be reduced, and therefore accurate focusing can be achieved without increasing the effective bit number of the driving chip, before step 301, the maximum focusing stroke of the optical lens can be divided into at least two focusing strokes according to the focusing multiple, one sensor is arranged at the middle position of each focusing stroke, and the measuring accuracy of the sensor can be determined according to the corresponding focusing stroke.
For example, as shown in fig. 4, assuming that the maximum focusing stroke of the optical lens is (0um, 4000um), the maximum focusing stroke is divided according to the zoom factor to obtain three focusing strokes, which are: the focusing stroke corresponding to 3 times zooming is (3000um, 4000um), the focusing stroke corresponding to 5 times zooming is (0um, 1000um), the focusing stroke corresponding to 2 times zooming is (1000um, 3000um), a sensor is arranged at 500um and is represented by hall1, a sensor is arranged at 2500um and is represented by hall2, and a sensor is arranged at 3500um and is represented by hall 3. It is assumed that the analog voltage value output by the sensor hall1 can be switched onThe chip with the over-effective bit number of 10 bits is quantized to obtain 210The analog voltage value corresponding to the distance that the optical lens moves in (0um, 1000um) is quantified by using 1024 quantization values, and the measurement accuracy of the sensor hall1, namely, 1000 um/1024 ≈ 1um is obtained by using the ratio of 1000um to 1024, that is, the minimum distance that the sensor hall1 can detect the movement of the optical lens is approximately 1 um. Likewise, the measurement accuracy of the sensor hall2 is: 2000um 1024 um 2um, that is, the minimum distance that the sensor hall2 can detect the optical lens movement is approximately 2 um; the measurement accuracy of the sensor hall3 is as follows: 1000um 1024 um 1um, that is, the minimum distance that the sensor hall3 can detect the optical lens movement is approximately 1 um.
Step 302: measuring a distance moved by the optical lens with a first sensor in response to the first instruction; and controlling the optical lens to move from the current position to a first position in a target focusing stroke by using the measured distance and the first step length corresponding to the first sensor.
Wherein the target focusing stroke may refer to a target focusing stroke corresponding to the second zoom multiple.
In practical application, in order to realize accurate focusing without increasing the effective bit number of the driving chip, at least two sensors with different measurement accuracies may be used to detect the moving distance of the optical lens in the maximum focusing stroke, that is, the sensor with the smaller measurement accuracy may be used to perform rough focusing first, and the sensor with the larger measurement accuracy may be used to perform fine focusing, thereby realizing accurate focusing.
Here, the first sensor may refer to a sensor having a small measurement accuracy, and the second sensor may refer to a sensor having a large measurement accuracy. When the electronic device includes at least two sensors, the determining of the first sensor and the second sensor may include: determining a distance that the optical lens moves from a current position to a target position; determining the first sensor and the second sensor using the distance.
For example, in conjunction with the schematic diagram shown in fig. 4, assuming that the second zoom factor is 5 times zoom, the target focusing stroke is (0um, 1000um), and the target position is 551um, a position 552um closer to the target position may be used as the first position, and the first sensor is determined by using the first distance that the optical lens moves from the current position to the first position; and determining the second sensor by using the target focusing stroke corresponding to the target position. Wherein the determining of the target position may include: determining the phase difference of the collected front and rear frames of images; determining the offset of the focal length of the optical lens by using the phase difference; determining the target location based on the determined offset.
Here, the determining process of the first sensor may specifically include: determining a first distance that the optical lens moves from a current position to a first position; determining the first sensor using the first distance.
For example, with reference to the schematic diagram shown in fig. 4, it is assumed that the second zoom multiple is zoom of 5 times, the target focusing stroke is (0um, 1000um), the first position is 552um, and the current position of the optical lens is 2000um, so that the first distance is 2000-552 um, and is quantized by using a driving chip with an effective bit number of 10 bits, and the measurement accuracy is 1448 um-1024-1.4 um, so that a sensor with a measurement accuracy greater than 1.4um can be searched from three sensors, and since the measurement accuracy of the sensor hall2 is approximately equal to 2um, the sensor hall2 is used as the first sensor.
Assuming that the current position of the optical lens is 4000um, the first distance is 4000-552-3448 um, and the driving chip with the effective bit number of 10bit is used for quantization to obtain the measurement precision of 3448 um-1024-3.36 um, so that a sensor with the measurement precision greater than 3.36um can be searched from the three sensors, and any one of the three sensors does not meet the requirement, so that the sensors hall1, hall2 and hall3 can be connected in series to obtain a sensor with the measurement precision approximately equal to 4um, and the sensor with the measurement precision approximately equal to 4um obtained in series is used as the first sensor.
In practical application, the optical lens can be controlled to move from the current position to a first position in a target focusing stroke by using a larger step length, the current position of the optical lens is detected by using a sensor with smaller measurement precision in the moving process of the optical lens, and finally the optical lens is controlled to move to the first position approximately aligned with the target position, so that coarse focusing is realized. Here, the smaller the measurement accuracy of the sensor is, the larger the step length for controlling the movement of the optical lens is, so that the distance that the optical lens moves in the maximum focusing stroke can be quantized by using 1024 quantization values corresponding to the driving chip with the effective bit number of 10 bits, the minimum measurement accuracy of the sensor is obtained, and the maximum step length for controlling the movement of the optical lens is obtained. It should be noted that, here, if the step size for controlling the movement of the optical lens is determined according to the maximum focusing stroke of the optical lens, the maximum step size for controlling the movement of the optical lens may be determined.
Based on this, in an embodiment, the method further comprises: determining the maximum focusing stroke of the optical lens; determining the first step size based on the maximum focus stroke.
For example, assuming that the maximum focusing stroke of the optical lens is (0um, 4000um), the analog voltage value corresponding to the distance that the optical lens moves in (0um, 4000um) is quantized by using 1024 quantization values, and the maximum measurement accuracy of the sensor is 4000um ÷ 1024 ≈ 4um by using the ratio of 4000um to 1024, so that the maximum step size for controlling the movement of the optical lens is 4um, and 4um is taken as the first step size.
Here, when the optical lens is controlled to move from the current position to the first position within the target focusing stroke by using the 4um step length, during the moving of the optical lens, the sensor with the measurement accuracy equal to 4um may be used to detect the current position of the optical lens, and finally the optical lens is controlled to move to the first position approximately aligned with the target position, so as to realize the coarse focusing.
In practical application, the sensor with the smaller measurement precision can be used for controlling the optical lens to move to the first position approximately aligned with the target position, so that coarse focusing is realized, and the sensor with the larger measurement precision is used for controlling the optical lens to move to the target position, so that fine focusing is realized. Here, the larger the focusing stroke corresponding to the sensor is, the smaller the measurement accuracy of the sensor is, the larger the step length for controlling the movement of the optical lens is, so that a focusing stroke larger than the target focusing stroke may be selected from the divided multiple focusing strokes, and the distance that the optical lens moves in the selected focusing stroke is quantized by using 1024 quantization values corresponding to a driving chip with an effective bit number of 10 bits by using the selected focusing stroke to obtain the measurement accuracy of the sensor, so as to obtain the larger step length for controlling the movement of the optical lens. It should be noted that, here, if the step size for controlling the movement of the optical lens is determined according to the focusing stroke greater than the target focusing stroke in the focusing stroke of the optical lens, a larger step size for controlling the movement of the optical lens may be determined.
Based on this, in an embodiment, the method further comprises: determining a first focus stroke of the optical lens; the first focusing stroke is larger than the target focusing stroke; determining the first step size based on the first focus stroke.
For example, assuming that the maximum focusing stroke of the optical lens is (0um, 4000um), the maximum focusing stroke is divided according to the zoom factor to obtain three focusing strokes, which are respectively: the 3 times zoom corresponding focusing stroke is (3000um, 4000um), the 5 times zoom corresponding focusing stroke is (0um, 1000um), and the 2 times zoom corresponding focusing stroke is (1000um, 3000 um). Assuming that the target focusing stroke is (0um, 1000um), a focusing stroke larger than the target focusing stroke is searched from the three focusing strokes, and only the focusing stroke corresponding to 2 times zooming is larger than the target focusing stroke, so that the focusing stroke corresponding to 2 times zooming can be used as the first focusing stroke. The difference value 2000um between the maximum value and the minimum value of the focusing stroke corresponding to 2 times of zooming and 1024 quantized values provided by the driving chip are utilized to obtain the measuring precision of the sensor which is 2000um ÷ 1024 ≈ 2um, and 2um is used as the step length for controlling the movement of the optical lens, namely the first step length.
Here, when the optical lens is controlled to move from the current position to the first position within the target focusing stroke by using 2um step length, during the moving of the optical lens, a sensor with a measurement accuracy equal to 2um may be used to detect the current position of the optical lens, and finally the optical lens is controlled to move to the first position approximately aligned with the target position, so as to realize coarse focusing.
Step 303: when the optical lens moves to the first position, measuring the moving distance of the optical lens by using a second sensor; controlling the optical lens to move from the first position to a target position by using the measured distance and a second step length corresponding to the second sensor so as to change the zoom multiple of the optical lens, so that the image quality acquired by the optical lens meets a preset condition; wherein the first step size is different from the second step size.
In practical application, in order to realize accurate focusing without increasing the effective bit number of the driving chip, at least two sensors with different measurement accuracies may be used to detect the moving distance of the optical lens in the maximum focusing stroke, that is, the sensor with the smaller measurement accuracy may be used to perform rough focusing first, and the sensor with the larger measurement accuracy may be used to perform fine focusing, thereby realizing accurate focusing.
Wherein, the second sensor can be a sensor with higher measurement precision. Here, the larger the measurement accuracy of the sensor is, the smaller the step size for controlling the movement of the optical lens is, so that the distance that the optical lens moves in the target focusing stroke can be quantized by using 1024 quantization values corresponding to a driving chip with an effective bit number of 10 bits, the maximum measurement accuracy of the sensor is obtained, and the minimum step size for controlling the movement of the optical lens is obtained.
Based on this, in an embodiment, the method further comprises: determining a target focusing stroke corresponding to the second zooming multiple by utilizing the corresponding relation between the zooming multiple and the focusing stroke; and determining the second step size based on the target focusing stroke.
For example, as shown in fig. 4, assuming that the maximum focusing stroke of the optical lens is (0um, 4000um), the maximum focusing stroke is divided according to the zoom factor to obtain three focusing strokes, which are: the 3 times zoom corresponding focusing stroke is (3000um, 4000um), the 5 times zoom corresponding focusing stroke is (0um, 1000um), and the 2 times zoom corresponding focusing stroke is (1000um, 3000 um). When the second zoom multiple is 5 times zoom, the target focusing stroke is (0um, 1000um), a 1024 quantization value is used to quantize the analog voltage value corresponding to the moving distance of the optical lens in (0um, 1000um), and the measurement precision of the second sensor is obtained by utilizing the ratio of 1000um to 1024 as 1000 um/1024 ≈ 1um, so that the second step length for controlling the movement of the optical lens is 1 um.
Here, at least two sensors with different measurement accuracies may be used to detect the distance that the optical lens moves in the maximum focusing stroke, and compared with a method of detecting the distance that the optical lens moves in the maximum focusing stroke using one sensor in the related art, accurate focusing may be achieved without increasing the number of effective bits of the driving chip.
FIG. 5 is a schematic diagram of three lens groups with different structures, as shown in FIG. 5, the first lens group is composed of 2 lenses, and the lenses of the lens group are fixed focus lenses; the second lens group is composed of 3 lenses, the lens of the lens group is a zoom lens, the maximum focusing stroke of the lens group is 4000um, and the measurement precision of the lens group is +/-16 um; the third lens group is composed of 2 lenses, the lens of the lens group is a zoom lens, the maximum focusing stroke of the lens group is 4000um, and the measurement precision of the lens group is +/-1 um. It should be noted that, since the lens of the first lens group is a fixed focus lens, the first lens group is not suitable for the control method of the optical lens of the electronic device according to the embodiment of the present invention. Since the maximum focusing stroke of the second lens group is 4000um and the measurement accuracy of the second lens group is ± 16um, 4000um ÷ 16um ═ 250 can be obtained≈28Therefore, the second lens group can be focused accurately by using the conventional driving chip with an effective bit number of 10 bits, that is, the second lens group is not suitable for the control method of the optical lens of the electronic device according to the embodiment of the present invention. Since the maximum focusing stroke of the third lens group is 4000um and the measurement accuracy of the second lens group is ± 1um, 4000um ÷ 1um ≈ 4000 ≈ 212Therefore, the third lens group cannot be focused accurately by using the conventional driving chip with an effective bit number of 10 bits, that is, the third lens group is suitable for the control method of the optical lens of the electronic device according to the embodiment of the invention.
As shown in fig. 6a and 6b, in the embodiment of the present invention, for the third lens group shown in fig. 5, when an instruction indicating to switch the zoom magnification of the optical lens of the electronic device to 3 times zoom is received, the distance moved by the optical lens is measured by using the first sensor (hall 2 in fig. 4); and utilize the measured distance and the first step length that first sensor corresponds, control optical lens moves to the first position in the target stroke of focusing (3000um, 4000um) from the current position, and it is right to recycle the second sensor (hall 1 in fig. 4) that the target stroke of focusing corresponds to optical lens's distance of moving measures, control optical lens moves to the target position in target stroke of focusing (3000um, 4000um), because optical lens is less than 1000um at the distance that the target stroke of focusing (3000um, 4000um) removed, consequently can use the drive chip that the effective bit number is 10bit to quantify the analog voltage value that the distance that detects corresponds to can realize accurate focusing under the condition of the effective bit number that need not to increase drive chip. Measuring a distance moved by an optical lens of an electronic device by using a first sensor (hall 1, hall2, hall3 in fig. 4) when receiving an instruction instructing to switch a zoom magnification of the optical lens to 5 times zoom; and utilize the measuring distance and the first step length that first sensor corresponds, control optical lens moves to the first position in the target stroke of focusing (0um, 1000um) from the current position, and it is right to recycle the second sensor (hall 2 in fig. 4) that the target stroke of focusing corresponds to optical lens's distance of moving measures, control optical lens moves to the target position in target stroke of focusing (0um, 1000um), because optical lens is less than 1000um at the distance that the target stroke of focusing (0um, 1000um) removed, consequently can use the drive chip that the effective bit number is 10bit to quantify the analog voltage value that the distance that detects corresponds to need not to realize accurate focusing under the condition of the effective bit number that improves drive chip.
In practical application, when a sensor is used for detecting the moving distance of the optical lens in the maximum focusing stroke to realize focusing, accurate focusing can be realized by improving the effective bit number of the driving chip, and specifically, the effective bit number of the driving chip is improved by 1-2 bits by optimizing the signal quality of a Printed Circuit Board (PCB), increasing the signal wiring ground, selecting a low dropout regulator (LDO) for a power supply, shortening the wiring as much as possible and the like.
By adopting the technical scheme provided by the embodiment of the invention, the moving distance of the optical lens can be detected by using two sensors with different measurement parameters, and the optical lens is controlled to move from the current position to the target position by using different step lengths, so that the accurate adjustment of the focal length of the optical lens can be realized under the condition of not increasing the effective bit number of the driving chip, and the optical lens can acquire clearer images, thereby being beneficial to improving the user experience.
In order to implement the control method of the embodiment of the invention, the embodiment of the invention also provides a control device of the optical lens of the electronic equipment. FIG. 7 is a schematic diagram illustrating a structure of a control device of an optical lens of an electronic apparatus according to an embodiment of the present invention; as shown in fig. 7, the control device includes:
a receiving unit 71 for receiving a first instruction; the first instruction is used for instructing to switch the zoom multiple of an optical lens of the electronic equipment from a first zoom multiple to a second zoom multiple;
a control unit 72 for measuring a distance moved by the optical lens with a first sensor in response to the first instruction; controlling the optical lens to move from the current position to a first position in a target focusing stroke by using the measured distance and a first step length corresponding to the first sensor; and measuring a distance moved by the optical lens with a second sensor; controlling the optical lens to move from the first position to a target position by using the measured distance and a second step length corresponding to the second sensor so as to change the zoom multiple of the optical lens, so that the image quality acquired by the optical lens meets a preset condition; wherein the measurement parameters of the first sensor and the second sensor are different; the first step size is greater than the second step size.
The electronic device may be a mobile terminal or the like; the optical lens may be a lens supporting zooming, and may specifically be an automatic zoom lens, an automatic aperture electric zoom lens, or the like.
Here, the electronic device may determine whether the first instruction is received through a zoom multiple input by a user on a display interface, and specifically, when the zoom multiple input by the user on the display interface is received, determine that the first instruction is received; or, the electronic device may determine whether the first instruction is received by detecting a touch operation of a user on a zoom multiple displayed on a display interface, and specifically, determine that the first instruction is received when the touch operation is detected.
Wherein the target focusing stroke may refer to a target focusing stroke corresponding to the second zoom multiple.
In practical application, in order to realize accurate focusing without increasing the effective bit number of the driving chip, at least two sensors with different measurement accuracies may be used to detect the moving distance of the optical lens in the maximum focusing stroke, that is, the sensor with the smaller measurement accuracy may be used to perform rough focusing first, and the sensor with the larger measurement accuracy may be used to perform fine focusing, thereby realizing accurate focusing.
Here, the first sensor may refer to a sensor having a small measurement accuracy, and the second sensor may refer to a sensor having a large measurement accuracy. When the electronic device includes at least two sensors, the determining process of the first sensor and the second sensor may include: determining a distance that the optical lens moves from a current position to a target position; determining the first sensor and the second sensor using the distance.
Here, the determination process of the first sensor may include: determining a first distance that the optical lens moves from a current position to a first position; determining the first sensor using the first distance.
In practical application, the optical lens can be controlled to move from the current position to a first position in a target focusing stroke by using a larger step length, the current position of the optical lens is detected by using a sensor with smaller measurement precision in the moving process of the optical lens, and finally the optical lens is controlled to move to the first position approximately aligned with the target position, so that coarse focusing is realized. Here, the smaller the measurement accuracy of the sensor is, the larger the step length for controlling the movement of the optical lens is, so that the distance that the optical lens moves in the maximum focusing stroke can be quantized by using 1024 quantization values corresponding to the driving chip with the effective bit number of 10 bits, the minimum measurement accuracy of the sensor is obtained, and the maximum step length for controlling the movement of the optical lens is obtained. It should be noted that, here, if the step size for controlling the movement of the optical lens is determined according to the maximum focusing stroke of the optical lens, the maximum step size for controlling the movement of the optical lens may be determined.
Based on this, in an embodiment, the control unit 72 is further configured to determine a maximum focusing stroke of the optical lens; determining the first step size based on the maximum focus stroke.
In practical application, the sensor with the smaller measurement precision can be used for controlling the optical lens to move to the first position approximately aligned with the target position, so that coarse focusing is realized, and the sensor with the larger measurement precision is used for controlling the optical lens to move to the target position, so that fine focusing is realized. The larger the focusing stroke corresponding to the sensor is, the smaller the measurement accuracy of the sensor is, the larger the step length for controlling the optical lens to move is, so that the focusing stroke larger than the target focusing stroke can be selected from the divided multiple focusing strokes, and by using the selected focusing stroke, the distance of the optical lens moving in the selected focusing stroke is quantized by using 1024 quantization values corresponding to a driving chip with an effective bit number of 10 bits, so as to obtain the measurement accuracy of the sensor, and then the larger step length for controlling the optical lens to move is obtained. It should be noted that, here, if the step size for controlling the movement of the optical lens is determined according to the focusing stroke greater than the target focusing stroke in the focusing stroke of the optical lens, a larger step size for controlling the movement of the optical lens may be determined.
Based on this, in an embodiment, the control unit 72 is further configured to determine a first focus stroke of the optical lens; the first focusing stroke is larger than the target focusing stroke; determining the first step size based on the first focus stroke.
In practical application, in order to realize accurate focusing without increasing the effective bit number of the driving chip, at least two sensors with different measurement accuracies may be used to detect the moving distance of the optical lens in the maximum focusing stroke, that is, the sensor with the smaller measurement accuracy may be used to perform rough focusing first, and the sensor with the larger measurement accuracy may be used to perform fine focusing, thereby realizing accurate focusing.
Wherein, the second sensor can be a sensor with higher measurement precision. Here, the larger the measurement accuracy of the sensor is, the smaller the step size for controlling the movement of the optical lens is, so that the distance that the optical lens moves in the target focusing stroke can be quantized by using 1024 quantization values corresponding to a driving chip with an effective bit number of 10 bits, the maximum measurement accuracy of the sensor is obtained, and the minimum step size for controlling the movement of the optical lens is obtained.
Based on this, in an embodiment, the control unit 72 is further configured to determine a target focusing stroke corresponding to the second zoom multiple by using the corresponding relationship between the zoom multiple and the focusing stroke; and determining the second step length based on the target focusing stroke.
In actual application, the receiving unit 71 is implemented by a communication interface in the control device; the control unit 72 may be implemented by a processor in the control device.
It should be noted that: the above embodiments provide an example of the control device for an optical lens of an electronic device, which is only illustrated by the division of the program modules, in practical applications, the above processing distribution may be completed by different program modules according to needs, that is, the internal structure of the device is divided into different program modules, so as to complete all or part of the above described processing. In addition, the control apparatus for an optical lens of an electronic device and the control method embodiment of an optical lens of an electronic device provided in the foregoing embodiments belong to the same concept, and specific implementation processes thereof are detailed in the method embodiments and are not described herein again.
An embodiment of the present invention further provides a control device for an optical lens of an electronic apparatus, as shown in fig. 8, where the control device 80 includes: a communication interface 81, a processor 82, a memory 83; wherein, the first and the second end of the pipe are connected with each other,
a communication interface 81 capable of performing information interaction with other devices;
and the processor 82 is connected with the communication interface 81 and is used for executing the method provided by one or more technical schemes of the intelligent device side when running a computer program. And the computer program is stored on the memory 83.
Of course, in practice, the various components of the control device 80 are coupled together by a bus system 84. It will be appreciated that the bus system 84 is used to enable communications among the components. The bus system 84 includes a power bus, a control bus, and a status signal bus in addition to a data bus. For clarity of illustration, however, the various buses are labeled as bus system 84 in fig. 8.
The memory 83 in the embodiment of the present application is used to store various types of data to support the operation of the control device 80. Examples of such data include: any computer program for operating on the control device 80.
The method disclosed in the embodiment of the present application can be applied to the processor 82, or implemented by the processor 82. The processor 82 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 82. The Processor 82 may be a general purpose Processor, a Digital Signal Processor (DSP), or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, etc. The processor 82 may implement or perform the methods, steps, and logic blocks disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software modules may be located in a storage medium located in the memory 83, and the processor 82 reads the information in the memory 83 to perform the steps of the aforementioned method in conjunction with its hardware.
In an exemplary embodiment, the control Device 80 may be implemented by one or more Application Specific Integrated Circuits (ASICs), DSPs, Programmable Logic Devices (PLDs), Complex Programmable Logic Devices (CPLDs), Field Programmable Gate Arrays (FPGAs), general purpose processors, controllers, Micro Controllers (MCUs), microprocessors (microprocessors), or other electronic components for performing the aforementioned methods.
It is to be understood that the memory 83 of the embodiments of the present application may be either volatile memory or nonvolatile memory, and may include both volatile and nonvolatile memory. Among them, the nonvolatile Memory may be a Read Only Memory (ROM), a Programmable Read Only Memory (PROM), an Erasable Programmable Read-Only Memory (EPROM), an Electrically Erasable Programmable Read-Only Memory (EEPROM), a magnetic random access Memory (FRAM), a Flash Memory (Flash Memory), a magnetic surface Memory, an optical disk, or a Compact Disc Read-Only Memory (CD-ROM); the magnetic surface storage may be disk storage or tape storage. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of illustration and not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Synchronous Static Random Access Memory (SSRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), Double Data Rate Synchronous Dynamic Random Access Memory (DDRSDRAM), Enhanced Synchronous Dynamic Random Access Memory (ESDRAM), Enhanced Synchronous Dynamic Random Access Memory (Enhanced DRAM), Synchronous Dynamic Random Access Memory (SLDRAM), Direct Memory (DRmb Access), and Random Access Memory (DRAM). The memories described in the embodiments of the present application are intended to comprise, without being limited to, these and any other suitable types of memory.
It should be noted that: "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described device embodiments are merely illustrative, for example, the division of the unit is only one logical function division, and there may be other division ways in actual implementation, such as: multiple units or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the coupling, direct coupling or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between the devices or units may be electrical, mechanical or other forms.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed on a plurality of network units; some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, all the functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may be separately used as one unit, or two or more units may be integrated into one unit; the integrated unit may be implemented in the form of hardware, or in the form of hardware plus a software functional unit. Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: a removable storage device, a ROM, a RAM, a magnetic or optical disk, or various other media that can store program code.
The methods disclosed in the several method embodiments provided in the present application may be combined arbitrarily without conflict to obtain new method embodiments.
Features disclosed in several of the product embodiments provided in the present application may be combined in any combination to yield new product embodiments without conflict.
The features disclosed in the several method or apparatus embodiments provided in the present application may be combined arbitrarily, without conflict, to arrive at new method embodiments or apparatus embodiments.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (12)
1. A method for controlling an optical lens of an electronic device, comprising:
receiving a first instruction; the first instruction is used for instructing to switch the zoom multiple of an optical lens of the electronic equipment from a first zoom multiple to a second zoom multiple;
measuring a distance moved by the optical lens with a first sensor in response to the first instruction; controlling the optical lens to move from the current position to a first position in a target focusing stroke by using the measured distance and a first step length corresponding to the first sensor;
measuring a distance moved by the optical lens with a second sensor; controlling the optical lens to move from the first position to a target position by using the measured distance and a second step length corresponding to the second sensor so as to change the zoom multiple of the optical lens and enable the image quality acquired by the optical lens to meet a preset condition; wherein the first sensor and the second sensor have different measurement accuracies; the first step size is greater than the second step size.
2. The control method according to claim 1, characterized by further comprising:
determining a distance that the optical lens moves from a current position to a target position;
determining the first sensor and the second sensor using the distance.
3. The control method according to claim 1, characterized by further comprising:
determining a target focusing stroke corresponding to the second zooming multiple by utilizing the corresponding relation between the zooming multiple and the focusing stroke;
and determining the second step size based on the target focusing stroke.
4. The control method according to claim 1, characterized by further comprising:
determining the maximum focusing stroke of the optical lens;
determining the first step size based on the maximum focus stroke.
5. The control method according to claim 1, characterized by further comprising:
determining a first focus stroke of the optical lens; the first focusing stroke is larger than the target focusing stroke;
determining the first step size based on the first focus stroke.
6. A control apparatus of an optical lens of an electronic device, comprising:
a receiving unit for receiving a first instruction; the first instruction is used for instructing to switch the zoom multiple of an optical lens of the electronic equipment from a first zoom multiple to a second zoom multiple;
the control unit is used for responding to the first instruction and measuring the moving distance of the optical lens by using a first sensor; controlling the optical lens to move from the current position to a first position in a target focusing stroke by using the measured distance and a first step length corresponding to the first sensor; and measuring a distance moved by the optical lens with a second sensor; controlling the optical lens to move from the first position to a target position by using the measured distance and a second step length corresponding to the second sensor so as to change the zoom multiple of the optical lens, so that the image quality acquired by the optical lens meets a preset condition; wherein the first sensor and the second sensor have different measurement accuracies; the first step size is greater than the second step size.
7. The control device of claim 6, wherein the control unit is further configured to determine a distance that the optical lens moves from a current position to a target position; determining the first sensor and the second sensor using the distance.
8. The control device according to claim 6, wherein the control unit is further configured to determine a target focusing stroke corresponding to the second zoom factor by using a corresponding relationship between zoom factors and focusing strokes; and determining the second step length based on the target focusing stroke.
9. The control device according to claim 6, wherein the control unit is further configured to determine a maximum focusing stroke of the optical lens; determining the first step size based on the maximum focus stroke.
10. The control device according to claim 6, wherein the control unit is further configured to determine a first focus stroke of the optical lens; the first focusing stroke is larger than the target focusing stroke; determining the first step size based on the first focus stroke.
11. A control apparatus for an optical lens of an electronic device, comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the steps of the control method according to any one of claims 1 to 5 are implemented when the processor executes the program.
12. A computer storage medium having computer instructions stored thereon, wherein the instructions, when executed by a processor, implement the steps of the control method of any one of claims 1 to 5.
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| CN112764305A (en) * | 2021-01-27 | 2021-05-07 | 深圳市火乐科技发展有限公司 | Automatic focusing assembly, automatic focusing method and projector |
| CN113945212B (en) * | 2021-10-15 | 2023-11-10 | 广州市明道文化科技集团股份有限公司 | Positioning method and device for moving head light actuating mechanism and electronic equipment |
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