CN110927918A - Long-stroke focusing lens rapid convergence focusing method and projector applying same - Google Patents
Long-stroke focusing lens rapid convergence focusing method and projector applying same Download PDFInfo
- Publication number
- CN110927918A CN110927918A CN201911375212.7A CN201911375212A CN110927918A CN 110927918 A CN110927918 A CN 110927918A CN 201911375212 A CN201911375212 A CN 201911375212A CN 110927918 A CN110927918 A CN 110927918A
- Authority
- CN
- China
- Prior art keywords
- lens
- motor
- controller
- focusing
- stroke
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/09—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted for automatic focusing or varying magnification
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/28—Systems for automatic generation of focusing signals
- G02B7/282—Autofocusing of zoom lenses
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/142—Adjusting of projection optics
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Automatic Focus Adjustment (AREA)
- Projection Apparatus (AREA)
Abstract
The invention discloses a quick convergence focusing method of a long-stroke focusing lens and a projector applying the device, wherein a camera, a memory, a controller, a motor and a lens linked with the motor through a linkage device are arranged in the projector; the method comprises the following steps: before automatic focusing, storing the correlation between the initial position of the lens along the moving axis and the size of the picture in a memory; during automatic focusing, the camera sends picture size data to the controller, the controller compares the picture size, reads the lens stopping position, and calculates the stroke distance and the stroke direction of the lens according to the correlation between the picture size and the lens position; the controller sends a first instruction to the motor to enable the motor linkage lens to move towards a first direction, and the first instruction controls the movement distance of the motor linkage lens to be larger than the calculated travel distance; the controller sends a second instruction to the motor to enable the motor to be linked with the lens to move towards a second direction; the second direction is opposite to the first direction.
Description
Technical Field
The invention belongs to the field of projectors, and relates to a quick convergence focusing method for a long-stroke focusing lens and a projector using the same.
Background
Before using the projector, focusing is generally performed to make the projected image more clear, and the general processing method is to manually adjust the lens until the projected image is clear. The manual adjustment operation is troublesome and time-consuming and labor-consuming.
The prior solution is exemplified by patent CN201710264718.5, but the method described in the patent lacks several calculation bases and methods;
the patent logic of how to generate data for moving the motor, whether it is rotating in the forward or reverse direction, is not known. However, for the conventional DLP projector, the lens has only a few millimeters of rotation, so the logic is to make the motor move once in both forward and reverse directions, so the full stroke adjustment can be realized, and the time is controllable and acceptable.
However, for the LCD projector, the stroke of the lens exceeds 1 cm, so that the lens is moved in the forward direction or the reverse direction by the motor according to the conventional method, and if the judgment is made incorrectly, a long time is delayed, and the user experience is reduced.
Disclosure of Invention
The invention aims to: provides a method for rapidly converging and focusing a long-stroke focusing lens and a projector using the same, and solves the problem of high convergence rate of the long-stroke focusing lens
The technical scheme adopted by the invention is as follows:
a projector of the device is provided with a camera, a memory, a controller, a motor and a lens linked with the motor through a linkage device; the method comprises the following steps:
s1, before automatic focusing, storing the correlation between the initial position of the lens along the moving axis and the size of the picture in a memory;
s2, when automatic focusing is carried out, the camera sends picture size data to the controller, the controller compares the picture size, reads the lens stop position, and calculates the stroke distance and the stroke direction of the lens according to the correlation between the picture size and the lens position;
s3, the controller sends a first instruction to the motor to enable the motor linkage lens to move towards a first direction, and the first instruction controls the movement distance of the motor linkage lens to be larger than the calculated travel distance;
s4, the controller sends a second instruction to the motor to enable the motor to move towards a second direction in linkage with the lens; the second direction is opposite to the first direction.
This scheme is in order to solve the not enough of traditional problem: by adopting the scheme, the relation between the stroke position and the picture size is preset, and the relation between the magnification factor and the distance of the specific lens and the picture size is fixed.
The projection RATIO (vertical RATIO) of each projector is set to TR, the size of the projected screen is set to X, and the screen height can be calculated in accordance with the RATIO of 4:3 or 16:9, respectively, based on the screen width. The distance between the projected picture and the lens of the projector is Y, and according to the physical law, TR is Y/X;
according to the specification of each projector, the initial position of the projection lens at the lens can be set to be 0, and the corresponding distance is Y0; the picture width is X0; the farthest position of the lens is 1, and the distance is Y1 in the corresponding most appropriate and clearest focusing state; the picture width is X1.
In a specific application, if the width of a certain frame is set to Xm, the corresponding lens position is between (0 and 1), defined as m.
According to the basic optical principle:
TR＝Y0/X0＝Y1/X1＝Ym/Xm
(Y1-Ym)/(Ym-Y0)＝(1-m)/(m-0)
because the camera can read the size of Xm, so, can be clear calculate the size of Ym, substitute the formula and can be clear to obtain following equation:
M＝1/((Y1-Ym)/(Ym-Y0)+1)；
the data were then obtained, m ═ 1/((Y1-Xm.TR)/(Xm.TR-Y0) +1)
When the actual length of the projection lens is not equal to 1, no matter centimeter or millimeter, the actual length ratio is calculated.
When the lens is at a certain position m, the stroke of the lens can be clearly known.
Taking the current position of the lens as n, if n is greater than m, the lens should be towards the 0 scale direction as a first instruction direction;
if n < m, the lens should be in the first command direction toward the 1-scale direction.
Further: before the controller sends a first instruction to the motor and the motor is linked with the lens to move towards the first direction, the method further comprises the following steps:
s301, the controller reads the size of a picture and the position of a lens resident moving shaft, and calculates a first moving direction;
s302, the controller calculates theoretical rotation data required by a motor when the lens reaches a target position along a first movement direction;
and S303, setting actual rotation data corresponding to the travel required by the matched moving distance to be larger than the calculated travel distance according to the theoretical rotation data.
Further: the camera acquires the image projected by the projector when the motor rotates by one step and sends the image to the controller, and the controller receives and reads the definition of the image and records the coordinate of the lens on the moving shaft when the highest definition is recorded.
Further: before the controller sends a second instruction to the motor and the motor is linked with the lens to move towards a second direction, the method further comprises the following steps:
s401, recording the coordinate of the lens on the moving axis at the time of the highest definition according to the controller; calculating theoretical rotation data required by the motor;
and S402, according to the theoretical rotation data, setting the matched moving distance to be larger than the actual rotation data corresponding to the travel distance from the current position to the image position with the highest definition.
Further: when the motor is linked with the lens to move towards the second direction, the controller compares the position of the lens on the moving shaft when the definition is highest in the first moving direction with the position of the lens on the moving shaft in the second moving direction; when the data are consistent, the controller records the picture with the highest definition as a target picture, and the position of the lens on the moving axis is a target position.
The errors are consistent in data within the threshold range, and the threshold value is determined according to different models.
Further: after the first direction movement and the second direction movement are completed, the method further comprises:
s5, repeatedly carrying out focusing action, sending a third instruction and a fourth instruction by the controller, and repeatedly carrying out action by the controller, the motor and the lens;
s6: stopping the action when the definition of the lens reading image is the target image definition,
in summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. different from the prior art, the mutual relation between the initial position of the lens along the moving axis and the size of the picture is preset and stored in the memory, and for the LCD projector, the user experience is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and that for those skilled in the art, other relevant drawings can be obtained according to the drawings without inventive effort, wherein:
FIG. 1 is a flow chart of the present invention;
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The features and properties of the present invention are described in further detail below with reference to examples.
Example one
The invention provides a method for rapidly converging and focusing a long-stroke focusing lens and a projector applying the device, wherein a camera, a memory, a controller, a motor and a lens linked with the motor through a linkage device are arranged in the projector; the method comprises the following steps:
s1, before automatic focusing, storing the correlation between the initial position of the lens along the moving axis and the size of the picture in a memory;
s2, when automatic focusing is carried out, the camera sends picture size data to the controller, the controller compares the picture size, reads the lens stop position, and calculates the stroke distance and the stroke direction of the lens according to the correlation between the picture size and the lens position;
s3, the controller sends a first instruction to the motor to enable the motor linkage lens to move towards a first direction, and the first instruction controls the movement distance of the motor linkage lens to be larger than the calculated travel distance;
s4, the controller sends a second instruction to the motor to enable the motor to move towards a second direction in linkage with the lens; the second direction is opposite to the first direction.
When in work: by targeting a particular lens, the relationship between its magnification and distance, and the size of the picture is fixed.
The projection RATIO (vertical RATIO) of each projector is set to TR, the size of the projected screen is set to X, and the screen height can be calculated in accordance with the RATIO of 4:3 or 16:9, respectively, based on the screen width. The distance between the projected picture and the lens of the projector is Y, and according to the physical law, TR is Y/X;
according to the specification of each projector, the initial position of the projection lens at the lens can be set to be 0, and the corresponding distance is Y0; the picture width is X0; the farthest position of the lens is 1, and the distance is Y1 in the corresponding most appropriate and clearest focusing state; the picture width is X1.
In a specific application, if the width of a certain frame is set to Xm, the corresponding lens position is between (0 and 1), defined as m.
According to the basic optical principle:
TR＝Y0/X0＝Y1/X1＝Ym/Xm
(Y1-Ym)/(Ym-Y0)＝(1-m)/(m-0)
because the camera can read the size of Xm, so, can be clear calculate the size of Ym, substitute the formula and can be clear to obtain following equation:
M＝1/((Y1-Ym)/(Ym-Y0)+1)；
the data were then obtained, m ═ 1/((Y1-Xm.TR)/(Xm.TR-Y0) +1)
When the actual length of the projection lens is not equal to 1, no matter centimeter or millimeter, the actual length ratio is calculated.
When the lens is at a certain position m, the stroke of the lens can be clearly known.
Taking the current position of the lens as n, if n is greater than m, the lens should be towards the 0 scale direction as a first instruction direction;
if n < m, the lens should be in the first command direction toward the 1-scale direction.
Example two
In this embodiment, on the basis of the first embodiment, further: before the controller sends a first instruction to the motor and the motor is linked with the lens to move towards the first direction, the method further comprises the following steps:
s301, the controller reads the size of a picture and the position of a lens resident moving shaft, and calculates a first moving direction;
s302, the controller calculates theoretical rotation data required by a motor when the lens reaches a target position along a first movement direction;
and S303, setting actual rotation data corresponding to the travel required by the matched moving distance to be larger than the calculated travel distance according to the theoretical rotation data.
The camera acquires the image projected by the projector when the motor rotates by one step and sends the image to the controller, and the controller receives and reads the definition of the image and records the coordinate of the lens on the moving shaft when the highest definition is recorded.
Before the controller sends a second instruction to the motor and the motor is linked with the lens to move towards a second direction, the method further comprises the following steps:
s401, recording the coordinate of the lens on the moving axis at the time of the highest definition according to the controller; calculating theoretical rotation data required by the motor;
and S402, according to the theoretical rotation data, setting the matched moving distance to be larger than the actual rotation data corresponding to the travel distance from the current position to the image position with the highest definition.
When the motor is linked with the lens to move towards the second direction, the controller compares the position of the lens on the moving shaft when the definition is highest in the first moving direction with the position of the lens on the moving shaft in the second moving direction; when the data are consistent, the controller records the picture with the highest definition as a target picture, and the position of the lens on the moving axis is a target position.
The errors are consistent in data within the threshold range, and the threshold value is determined according to different models.
After the first direction movement and the second direction movement are completed, the method further comprises:
s5, repeatedly carrying out focusing action, sending a third instruction and a fourth instruction by the controller, and repeatedly carrying out action by the controller, the motor and the lens;
s6: stopping the action when the definition of the lens reading image is the target image definition,
when in work: firstly, presetting a lens position, and prestoring picture size data in a controller; in the adjusting process, the size of a picture is obtained through a camera; the controller compares the size of the picture with the current position of the lens; thereby calculating the lens moving position and the lens moving direction; sending a first instruction to the motor, and enabling the motor to move towards a first direction; then sending a second instruction to the motor, wherein the second instruction is a reverse movement instruction; and comparing the first instruction with the second instruction, acquiring the image quality by the lens, and further issuing the instruction until the best effect is achieved. The instruction ends.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalents and improvements made by those skilled in the art within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (6)
1. A long-stroke focusing lens fast convergence focusing method and a projector using the device are characterized in that: the projector is internally provided with a camera, a memory, a controller, a motor and a lens linked with the motor through a linkage device; the method comprises the following steps:
s1, before automatic focusing, storing the correlation between the initial position of the lens along the moving axis and the size of the picture in a memory;
s2, when automatic focusing is carried out, the camera sends picture size data to the controller, the controller compares the picture size, reads the lens stop position, and calculates the stroke distance and the stroke direction of the lens according to the correlation between the picture size and the lens position;
s3, the controller sends a first instruction to the motor to enable the motor linkage lens to move towards a first direction, and the first instruction controls the movement distance of the motor linkage lens to be larger than the calculated travel distance;
s4, the controller sends a second instruction to the motor to enable the motor to move towards a second direction in linkage with the lens; the second direction is opposite to the first direction.
2. The method of claim 1 for fast convergence focusing of a long-stroke focusing lens and a projector using the same, wherein: before the controller sends a first instruction to the motor and the motor is linked with the lens to move towards the first direction, the method further comprises the following steps:
s301, the controller reads the size of a picture and the position of a lens resident moving shaft, and calculates a first moving direction;
s302, the controller calculates theoretical rotation data required by a motor when the lens reaches a target position along a first movement direction;
and S303, setting actual rotation data corresponding to the travel required by the matched moving distance to be larger than the calculated travel distance according to the theoretical rotation data.
3. The method of claim 1 for fast convergence focusing of a long-stroke focusing lens and a projector using the same, wherein: the camera acquires the image projected by the projector when the motor rotates by one step and sends the image to the controller, and the controller receives and reads the definition of the image and records the coordinate of the lens on the moving shaft when the highest definition is recorded.
4. The method of claim 3 for fast convergence focusing of a long-stroke focusing lens and a projector using the same, wherein: before the controller sends a second instruction to the motor and the motor is linked with the lens to move towards a second direction, the method further comprises the following steps:
s401, recording the coordinate of the lens on the moving axis at the time of the highest definition according to the controller; calculating theoretical rotation data required by the motor;
and S402, according to the theoretical rotation data, setting the matched moving distance to be larger than the actual rotation data corresponding to the travel distance from the current position to the image position with the highest definition.
5. The method of claim 4 for fast convergence focusing of a long-stroke focusing lens and a projector using the same, wherein: when the motor is linked with the lens to move towards the second direction, the controller compares the position of the lens on the moving shaft when the definition is highest in the first moving direction with the position of the lens on the moving shaft in the second moving direction; when the data are consistent, the controller records the picture with the highest definition as a target picture, and the position of the lens on the moving axis is a target position.
6. The method of claim 5 for fast convergence and focusing of a long-stroke focusing lens and a projector using the same, wherein: after the first direction movement and the second direction movement are completed, the method further comprises:
s5, repeatedly carrying out focusing action, sending a third instruction and a fourth instruction by the controller, and repeatedly carrying out action by the controller, the motor and the lens;
s6: and stopping the action when the definition of the lens reading image is already the target image definition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911375212.7A CN110927918A (en) | 2019-12-27 | 2019-12-27 | Long-stroke focusing lens rapid convergence focusing method and projector applying same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911375212.7A CN110927918A (en) | 2019-12-27 | 2019-12-27 | Long-stroke focusing lens rapid convergence focusing method and projector applying same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110927918A true CN110927918A (en) | 2020-03-27 |
Family
ID=69862265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911375212.7A Pending CN110927918A (en) | 2019-12-27 | 2019-12-27 | Long-stroke focusing lens rapid convergence focusing method and projector applying same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110927918A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112631048A (en) * | 2021-01-15 | 2021-04-09 | 广东联大光电有限公司 | Anti-jitter control method for picture in moving process of projector |
| CN113900346A (en) * | 2021-08-30 | 2022-01-07 | 安克创新科技股份有限公司 | Automatic focusing method of projector and projector |
| WO2022088684A1 (en) * | 2020-10-26 | 2022-05-05 | 成都极米科技股份有限公司 | Projection control method and apparatus, projection device, and computer readable storage medium |
| CN117156250A (en) * | 2023-10-27 | 2023-12-01 | 荣耀终端有限公司 | Driving device, camera module and electronic equipment |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60123814A (en) * | 1983-12-09 | 1985-07-02 | Konishiroku Photo Ind Co Ltd | Automatic focusing device of camera |
| CN102591121A (en) * | 2012-02-21 | 2012-07-18 | 苏州佳世达光电有限公司 | Automatic focusing method of projector and projection system using automatic focusing method |
| CN102724398A (en) * | 2011-03-31 | 2012-10-10 | 联想(北京)有限公司 | Image data providing method, combination method thereof, and presentation method thereof |
| CN102967983A (en) * | 2012-11-07 | 2013-03-13 | 苏州科达科技股份有限公司 | Automatic focusing method of camera |
| CN104570569A (en) * | 2015-01-27 | 2015-04-29 | 神画科技（深圳）有限公司 | Projector automatic focusing method based on sensor |
| CN105763795A (en) * | 2016-03-01 | 2016-07-13 | 苏州科达科技股份有限公司 | Focusing method and apparatus, cameras and camera system |
| CN106324795A (en) * | 2016-09-29 | 2017-01-11 | 电子科技大学 | Automatic fast focusing method for multiple views of detector's microscope |
| CN109116541A (en) * | 2018-09-10 | 2019-01-01 | 广州鸿琪光学仪器科技有限公司 | Microscope focusing method, device, computer equipment and storage medium |
-
2019
- 2019-12-27 CN CN201911375212.7A patent/CN110927918A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60123814A (en) * | 1983-12-09 | 1985-07-02 | Konishiroku Photo Ind Co Ltd | Automatic focusing device of camera |
| CN102724398A (en) * | 2011-03-31 | 2012-10-10 | 联想(北京)有限公司 | Image data providing method, combination method thereof, and presentation method thereof |
| CN102591121A (en) * | 2012-02-21 | 2012-07-18 | 苏州佳世达光电有限公司 | Automatic focusing method of projector and projection system using automatic focusing method |
| CN102967983A (en) * | 2012-11-07 | 2013-03-13 | 苏州科达科技股份有限公司 | Automatic focusing method of camera |
| CN104570569A (en) * | 2015-01-27 | 2015-04-29 | 神画科技（深圳）有限公司 | Projector automatic focusing method based on sensor |
| CN105763795A (en) * | 2016-03-01 | 2016-07-13 | 苏州科达科技股份有限公司 | Focusing method and apparatus, cameras and camera system |
| CN106324795A (en) * | 2016-09-29 | 2017-01-11 | 电子科技大学 | Automatic fast focusing method for multiple views of detector's microscope |
| CN109116541A (en) * | 2018-09-10 | 2019-01-01 | 广州鸿琪光学仪器科技有限公司 | Microscope focusing method, device, computer equipment and storage medium |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022088684A1 (en) * | 2020-10-26 | 2022-05-05 | 成都极米科技股份有限公司 | Projection control method and apparatus, projection device, and computer readable storage medium |
| CN114500962A (en) * | 2020-10-26 | 2022-05-13 | 成都极米科技股份有限公司 | Projection control method, projection control device, projection equipment and computer readable storage medium |
| CN112631048A (en) * | 2021-01-15 | 2021-04-09 | 广东联大光电有限公司 | Anti-jitter control method for picture in moving process of projector |
| CN113900346A (en) * | 2021-08-30 | 2022-01-07 | 安克创新科技股份有限公司 | Automatic focusing method of projector and projector |
| WO2023030066A1 (en) * | 2021-08-30 | 2023-03-09 | 安克创新科技股份有限公司 | Calculation method for non-inductive auto focus of projector |
| CN113900346B (en) * | 2021-08-30 | 2023-08-29 | 安克创新科技股份有限公司 | Automatic focusing method of projector and projector |
| CN117156250A (en) * | 2023-10-27 | 2023-12-01 | 荣耀终端有限公司 | Driving device, camera module and electronic equipment |
| CN117156250B (en) * | 2023-10-27 | 2024-04-09 | 荣耀终端有限公司 | Driving device, camera module and electronic equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110927918A (en) | Long-stroke focusing lens rapid convergence focusing method and projector applying same | |
| US9521311B2 (en) | Quick automatic focusing method and image acquisition apparatus | |
| CN105763795A (en) | Focusing method and apparatus, cameras and camera system | |
| US11838697B2 (en) | Ultra-short-throw picture and screen alignment method and apparatus, and storage medium | |
| CN102591121A (en) | Automatic focusing method of projector and projection system using automatic focusing method | |
| CN103747185B (en) | Zooming follow-up realizing method capable of enabling lens to shift with temperatures in auto-adaptive way | |
| US20190151992A1 (en) | Laser marking system with through-the-lens autofocus | |
| CN107465877B (en) | Track focusing method and device and related media production | |
| US20160248988A1 (en) | Method for Obtaining a Picture and Multi-Camera System | |
| CN104750443A (en) | Display control method and electronic equipment | |
| EP3879172A1 (en) | Machine-vision-based intelligent focusing method for moving head computer lamp | |
| CN106154688B (en) | Automatic focusing method and device | |
| CN109040728A (en) | A kind of ultrashort out-of-focus projection's device and method thereof with dual camera keystone | |
| WO2023213161A1 (en) | Target object tracking method, camera and storage medium | |
| JP2013175924A (en) | Drive unit and camera system | |
| US10880536B2 (en) | Three-dimensional image capturing device and method | |
| CN103048766A (en) | Automatic focusing method and automatic focusing device | |
| CN112598719B (en) | Depth imaging system, calibration method thereof, depth imaging method and storage medium | |
| US8878908B2 (en) | 3-D auto-convergence camera | |
| CN110216871B (en) | 3D printing method and printing system | |
| CN104980661A (en) | Method and apparatus for self-correcting camera lens | |
| CN111343443B (en) | Optical zooming focusing method, projection device and storage medium | |
| WO2016165339A1 (en) | Projection method, apparatus, and device | |
| JP2019208168A5 (en) | ||
| TWI588585B (en) | Image capture device and focus method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200327 |
|
| RJ01 | Rejection of invention patent application after publication |