CN110491316A - A kind of projector and its method for controlling projection - Google Patents
A kind of projector and its method for controlling projection Download PDFInfo
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- CN110491316A CN110491316A CN201910610063.1A CN201910610063A CN110491316A CN 110491316 A CN110491316 A CN 110491316A CN 201910610063 A CN201910610063 A CN 201910610063A CN 110491316 A CN110491316 A CN 110491316A
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- projector
- screen size
- focal length
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- 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
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/001—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background
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- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Optics & Photonics (AREA)
- Projection Apparatus (AREA)
Abstract
This application discloses a kind of projector and its method for controlling projection, the method for controlling projection of projector includes: to obtain the first information and the second information using the depth camera on the projector；According to first projector distance, the focal length of the projector lens is adjusted；According to the first projector distance and projected planar dimensions, adjust the projector to the projection plane screen size；According to the focal length adjusted and the screen size, Xiang Suoshu projection plane.The embodiment of the present application can focus automatically and adjust automatically projected picture size, meets practical application request, improves drop shadow effect, low in cost, enhances the market competitiveness of projector.
Description
Technical field
This application involves porjector technology fields, and in particular to a kind of projector and its method for controlling projection.
Background technique
In the related art, projector is divided into manual focusing and automatic focusing in focusing mode, wherein automatic focusing master
It is divided into telemetry and as two kinds of detection method.What telemetry focusing generallyd use is the modes ranging such as infrared ray and ultrasonic wave, is thrown
Shadow instrument receives infrared ray or ultrasonic wave that screen fires back by screen emissions infrared ray or ultrasonic wave, according to biography
The distance between projector and display screen are measured between sowing time, then are focused based on this distance.As detection method focusing is similar to
The automatic focusing that the products such as camera use is adopted by projecting scheduled test picture to screen using automatic focus pack
It after collecting the image on screen, is compared with built-in parameter, and then realizes the function of focusing.
However, telemetry is focused, need additionally to add infrared, ultrasonic wave module, increases the cost of projector and infrared
Interference by environmental factor is easy with ultrasonic wave, measurement is all a point arrives projector on screen distance, distance is not allowed,
Focusing accuracy is not high.It as detection method focusing, also needs to increase automatic focus pack, will lead to increase cost, and due to as examining
The normal image that survey method obtains lacks depth information, cannot achieve according to the function apart from adjust automatically projected picture size.
Summary of the invention
This application provides a kind of projector and its method for controlling projection, realize automatic focusing and according to projection plane
The size of the picture of size adjust automatically projection, meets actual demand, low in cost, improves the market competition of projector
Power.
According to the one aspect of the application, a kind of method for controlling projection of projector is provided, comprising:
The first information and the second information are obtained using the depth camera on the projector；Wherein the first information includes
The first projector distance between the projector and projection plane, second information includes projected planar dimensions；
According to first projector distance, the focal length of the projector lens is adjusted；
According to first projector distance and the projected planar dimensions, the projector is adjusted to the projection
The screen size of plane；
According to the focal length adjusted and the screen size, Xiang Suoshu projection plane.
According to further aspect of the application, a kind of projector is provided, the projector includes projecting cell, processing
Device and depth camera；
The depth camera is connected to the processor, for obtaining the first information and the second information, wherein described first
Information includes the first projector distance between the projector and projection plane, and second information includes projected planar dimensions；
The processor, for adjusting the focal length of the projector lens according to first projector distance；According to described in
First projector distance and the projected planar dimensions, adjust the projector to the projection plane screen size；
The projecting cell, for according to the focal length adjusted and the screen size, Xiang Suoshu projection plane
Projection.
Using the projector and its method for controlling projection of the embodiment of the present application, obtained according to depth camera on projector the
One information and the second information, the focal length and projector for adjusting projector lens and are pressed to the screen size of projection plane
According to focal length adjusted and screen size to projection plane, to realize automatic focusing and adjust automatically projection plane
The screen size of adaptation, improves drop shadow effect, meets practical application request, and only needs to be not required to by depth camera
It additionally to install additional, is infrared, the sensors such as ultrasonic wave, it is low in cost, it is suitble to large-scale promotion application.
Detailed description of the invention
Fig. 1 is the flow diagram of the method for controlling projection of the projector of the application one embodiment；
Fig. 2 is the block diagram of the projector of the application one embodiment；
Fig. 3 is the general frame of the projector of the application one embodiment.
Specific embodiment
In order to make the above objects, features, and advantages of the present application more apparent, with reference to the accompanying drawing and it is specific real
Applying mode, the present application will be further described in detail.Obviously, described embodiment is some embodiments of the present application, without
It is whole embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not before making creative work
Every other embodiment obtained is put, shall fall in the protection scope of this application.
The design concept of the application is: utilizing the distance of the depth camera acquired projections instrument on projector to projection plane
And the size of projection plane, the size based on distance and projection plane adjust the focal length of projector lens, the picture of projection
Size, and then realize automatic focusing, adjust automatically picture size fit projections plane meets projection demand, improves focusing
Precision, avoid cumbersome manual focus operations, improve user experience, low in cost, the market for enhancing projector is competing
Strive power.
Fig. 1 is the flow diagram of the method for controlling projection of the projector of the application one embodiment, referring to Fig. 1, this reality
The method for controlling projection for applying the projector of example includes the following steps:
Step S101 obtains the first information and the second information using the depth camera on the projector；Wherein described
One information includes the first projector distance between the projector and projection plane, and second information includes projected planar dimensions；
Step S102 adjusts the focal length of the projector lens according to first projector distance；
Step S103 adjusts the projector according to first projector distance and the projected planar dimensions
To the screen size of the projection plane；
Step S104, according to the focal length adjusted and the screen size, Xiang Suoshu projection plane.
As shown in Figure 1 it is found that the method for controlling projection of the projector of the present embodiment, realizes automatic focusing, hand is avoided
The cumbersome of focusing is moved, when the relative position between projector and projection plane changes, projector is automatically according to distance
Variation, focuses, more intelligently.Also, projector automatically adjusts picture size, that is, projector is according to projection plane
Actual size, the suitable screen size of adjust automatically in the range of projection plane to be shown, so as to improve projection effect
Fruit meets practical application request.Finally, the method for controlling projection of the projector of the embodiment of the present application do not need to install it is infrared,
The modules such as ultrasonic wave, focusing accuracy is high, and at low cost.
It should be noted that there is no strict implement sequence in Fig. 1 between step S102 and step S103, can be executed sequentially
Also it may be performed simultaneously.
The method for controlling projection of the projector of the present embodiment is applied to be equipped with the smart projector of depth camera, depth phase
Machine can acquire the depth information of environment, and current depth camera can be divided into three kinds: TOF (Time of according to its working principle
Flight, flight time), RGB binocular, structure light.Since TOF depth camera measurement method is simple, response is fastly, to a certain extent
The interference etc. of bias light is reduced, the depth camera of the present embodiment uses flight time TOF depth camera.The embodiment of the present application
TOF measurement is relative to the advantages of traditional infrared or ultrasonic distance measurement: what TOF was obtained is the range information of a plane,
And infrared and ultrasonic wave is typically only capable to obtain the range information of a point, therefore the information content that obtains of TOF be far longer than it is infrared and
The information content that ultrasonic wave obtains, so that error of focusing also can be smaller.And TOF depth camera belongs to the standard of smart projector and matches
It sets, realizes automatic focusing and adjustment of image size using TOF depth camera sampling depth information, projected planar dimensions information,
Hardware cost will not additionally be increased.
Specifically, the depth image of depth camera acquired projections plane, and by the depth of pixel each on depth image
Determine the first projector distance between projector and projection plane, be based on this, abovementioned steps S102, according to it is described first projection away from
From the focal length for adjusting projector lens includes: to search preset projector distance and the focal length according to first projector distance
Corresponding relationship, obtain corresponding with first projector distance focal length value；Based on the focal length value and the focal length and adjust
The corresponding relationship of coke displacement obtains focusing displacement；By the driving motor of the focusing displacement output to the projector, by described
The focal length of driving motor adjustment projector lens.
That is, after projector obtains the first projector distance, searching projector distance and focal length in the embodiment of the present application
Corresponding relationship determine current first projector distance (distance be shoot object to depth camera focal plane distance) under
Corresponding focal length value, for example, the first projector distance is 80 centimetres (only doing example), then it is corresponding with focal length to search projector distance
Relationship determines that corresponding focal length value is 50 millimeters (only doing example), determine focal length (focal length be light source to optical lens away from
From) after, corresponding relationship of the present embodiment based on focal length and focusing displacement obtains 50 millimeters of focal length value corresponding focusing displacements, will
Focusing displacement is sent to driving motor, and the work of adjustment focal length is specifically executed by driving motor, realizes the effect of automatic focusing.
On the basis of depth camera obtains the size of the first projector distance and projection plane, abovementioned steps S103, foundation
First projector distance and the projected planar dimensions, it includes: ratio that adjustment, which projects to the screen size of the projection plane,
The projected planar dimensions and default maximum screen size, wherein the default maximum screen size is that the projector exists
The screen size of the projection plane is projected under first projector distance, if the projected planar dimensions are greater than or equal to
The default maximum screen size then is determined as the default maximum screen size to project to the picture ruler of the projection plane
It is very little；If the projected planar dimensions are less than the default maximum screen size, the default maximum screen size is reduced extremely
First screen size is determined as projecting to the screen size of the projection plane by the first screen size, wherein described
The difference that one screen size is equal between the projected planar dimensions or first screen size and the projected planar dimensions is small
In first threshold.
It should be noted that not only correlation is also flat with projection at a distance from projector to projection plane for the size of projected picture
The size in face is related.Consider apart from influence factor, it is in general, big apart from remote picture, it is small apart from close picture；Distance is certain
Under the premise of, the size of projection plane determines screen size, if screen size is excessive, it is flat beyond projection to will lead to picture
Face, drop shadow effect are bad.Therefore, in the present embodiment, the size of entire projection plane, and compared projections are obtained using depth camera
The size of planar dimension and default maximum screen size, if projected planar dimensions are greater than or equal to default maximum screen size,
Then it is determined as default maximum screen size to project to the size of the picture of projection plane；If projected planar dimensions are less than default
Maximum screen size then reduces default maximum screen size to the first screen size, the first screen size is determined as projecting to
The size of the picture of projection plane.
Here default maximum screen size is the maximum picture that projector projects to projection plane under the first projector distance
Face size；First screen size can be equal between projected planar dimensions or the first screen size and projected planar dimensions
Difference is less than first threshold, that is, the first screen size is more smaller than projected planar dimensions.
In order to guarantee image projection effect, the present embodiment is in adjust automatically screen size, using the thought of uniform zoom,
That is, reducing default maximum screen size to the first screen size includes: to reduce default maximum screen size to the first picture ruler
When very little, keep the length of default maximum screen size and the ratio between width constant.
For example, under the premise of projector distance is 60cm, display screen size is length: 52 centimetres, wide: 29 centimetres,
Length-width-ratio is approximately equal to 1.7.Smaller in the size of target projection screen, the corresponding length and width for reducing picture is thrown to target
When the maximum magnitude that shadow screen can be supported, keeping length-width-ratio is still 1.7, the screen size after being adjusted, such as long
Degree are as follows: 26 centimetres, width are as follows: 15 centimetres.
From the foregoing, it will be observed that the method for controlling projection of the projector of the embodiment of the present application, realizes automatic focusing, adjust automatically is drawn
Face size fit projections plane, meets projection demand, improves the precision of focusing, avoid cumbersome manual focus operations,
Improve user experience.
Fig. 2 is the block diagram of the projector of the application one embodiment, and referring to fig. 2, the projector 200 of the present embodiment includes throwing
Shadow unit 203, processor 202 and depth camera 201；
The depth camera 201 is connect with the processor 202, for obtaining the first information and the second information, wherein institute
Stating the first information includes the first projector distance between the projector and projection plane, and second information includes projection plane ruler
It is very little；
The processor 202, for adjusting the focal length of the projector lens according to first projector distance；Foundation
First projector distance and the projected planar dimensions, adjust the projector to the projection plane picture ruler
It is very little；
The projecting cell 203, for being put down to the projection according to the focal length adjusted and the screen size
Face projection.
In one embodiment of the application, depth camera 201 is flight time TOF depth camera.
Since the projected picture region of projector needs completely within the scope of the detecting area of depth camera, such depth phase
Projected picture exceeds projection screen when machine is just avoided that projection, and therefore, the field range of the TOF depth camera of the present embodiment is greater than
The field range of projector lens.That is, the maximum field of view angle FOV (Field of View) of depth camera 201 is greater than projector mirror
The maximum field of view angle FOV of head.TOF depth camera constantly detects the depth information of projection plane, to obtain projection plane
Full-size and projection plane are the distance between to projector.
The depth information of a complete plane can be obtained by TOF depth camera, to know projection plane (as shown
Display screen curtain) distance and projection plane size, this two information be respectively intended to adjustment lens focus and projected picture display
Size.
In one embodiment of the application, projector further includes driving motor, processor 202, for according to described the
One projector distance searches the corresponding relationship of preset projector distance Yu the focal length, obtains corresponding with first projector distance
Focal length value, the corresponding relationship based on the focal length value and the focal length and focusing displacement obtains focusing displacement；It will be described
Focusing displacement is exported to the driving motor；Driving motor, for according to projector lens described in the focusing adjustment of displacement
The focal length.
In one embodiment of the application, the processor 202 for the projected planar dimensions and is preset most
Big screen size, wherein the default maximum screen size is that the projector projects to institute under first projector distance
State the screen size of projection plane；If the projected planar dimensions are greater than or equal to the default maximum screen size, will
The default maximum screen size is determined as projecting to the screen size of the projection plane；If the projected planar dimensions are small
In the default maximum screen size, then the default maximum screen size is reduced to the first screen size, described first is drawn
Face is sized to project to the screen size of the projection plane, wherein it is flat that first screen size is equal to the projection
Difference between face size or first screen size and the projected planar dimensions is less than first threshold.
It should be noted that the illustration explanation of each function performed by each component in the projector shown in Fig. 2,
It is consistent with the illustration explanation in preceding method embodiment, it no longer repeats one by one here.
Fig. 3 is the general frame of the projector of the application one embodiment, referring to Fig. 3, the TOF of the projector of the present embodiment
Depth camera obtains projection plane to the initial data of projector, and it is laggard that processor from TOF depth camera gets initial data
Row parsing, to obtain the dimension information of projector distance information and projection plane.
Referring to Fig. 3, which is sent to distance and focal length algorithm process unit, distance and focal length by processor
Algorithm process unit exports a focal length value to the specific driving electricity for executing focus operations according to the functional relation of distance and focal length
Machine is moved to the position of focal length value instruction by driving motor control camera lens.
Referring to Fig. 3, the dimension information of projector distance information and projection plane is sent to screen size algorithm by processor
Processing unit, screen size algorithm process unit is according to the projector distance information got, the boundary dimensions of projection plane, jointly
The dimension information of projected picture is sent to the specific DMD for executing the adjustment of screen size size by the size for calculating projected picture
Ray machine.It is appreciated that the image in projector is by DMD (Digital Micromirror Device, digital micromirror device)
Generate, DMD is made of many small mirrors faces, eyeglass number determined by display resolution, each micromirror control
A pixel in projected picture, the quantity of micromirror are consistent with the resolution ratio of projected picture.
In the present embodiment, the screen size algorithm process unit situation certain in projector distance, when the size of projection plane
When greater than maximal projection picture, then according to maximal projection picture by image projection to projection plane, if projection plane
Size is less than maximal projection picture, then needs to reduce the size of maximal projection picture with the size of fit projections plane, in this way, real
The effect that the screen size of projection plane is now projected to according to the size adjust automatically of projection plane, optimizes user's body
It tests.
It should be noted that the description and claims of this application and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Object be interchangeable under appropriate circumstances, so as to the embodiment of the present invention described herein can in addition to it is described herein with
Outer sequence is implemented.
In conclusion utilizing the depth on projector using the projector and its method for controlling projection of the embodiment of the present application
Camera acquired projections instrument is flat according to range information and projection to the distance between projection plane and projected planar dimensions size
Face size realizes automatic adjustment focal length and automatically adjusts the function of projected image size, to simplify system design and behaviour
Make process, save cost, improve user experience, improves the market competitiveness of projector.
The application is referring to method, the process of equipment (system) and computer program product according to the embodiment of the present application
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The dress for the function of being specified in one box or multiple boxes of one process or multiple processes and/or block diagrams of present flow chart
It sets.
It should be noted that the terms "include", "comprise" or its any other variant are intended to the packet of nonexcludability
Contain, so that the process, method, article or equipment for including a series of elements not only includes those elements, but also including
Other elements that are not explicitly listed, or further include for elements inherent to such a process, method, article, or device.
In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including the element
Process, method, article or equipment in there is also other identical elements.
In the description of the present application, numerous specific details are set forth.Although it is understood that embodiments herein can
To practice without these specific details.In some instances, well known method, structure and skill is not been shown in detail
Art, so as not to obscure the understanding of this specification.Similarly, it should be understood that disclose to simplify the application and help to understand each
One or more of a inventive aspect, in the description above to the exemplary embodiment of the application, each spy of the application
Sign is grouped together into a single embodiment, figure, or description thereof sometimes.However, should not be by the method solution of the disclosure
It is interpreted into and reflects an intention that i.e. claimed this application claims more than feature expressly recited in each claim
More features.More precisely, just as the following claims reflect, inventive aspect is single less than disclosed above
All features of embodiment.Therefore, it then follows thus claims of specific embodiment are expressly incorporated in the specific embodiment party
Formula, wherein separate embodiments of each claim as the application itself.
The above, the only specific embodiment of the application, under the above-mentioned introduction of the application, those skilled in the art
Other improvement or deformation can be carried out on the basis of the above embodiments.It will be understood by those skilled in the art that above-mentioned tool
The purpose of the application is only preferably explained in body description, and the protection scope of the application is subject to the protection scope in claims.
Claims (10)
1. a kind of method for controlling projection of projector characterized by comprising
The first information and the second information are obtained using the depth camera on the projector；Wherein the first information includes described
The first projector distance between projector and projection plane, second information includes projected planar dimensions；
According to first projector distance, the focal length of the projector lens is adjusted；
According to first projector distance and the projected planar dimensions, the projector is adjusted to the projection plane
Screen size；
According to the focal length adjusted and the screen size, Xiang Suoshu projection plane.
2. method for controlling projection as described in claim 1, which is characterized in that described according to first projector distance, adjustment
The focal length of the projector lens includes:
According to first projector distance, the corresponding relationship of preset projector distance Yu the focal length is searched, is obtained and described the
The corresponding focal length value of one projector distance；
Corresponding relationship based on the focal length value and the focal length and focusing displacement, obtains focusing displacement；
By the driving motor of the focusing displacement output to the projector, by the institute of driving motor adjustment projector lens
State focal length.
3. method for controlling projection as described in claim 1, which is characterized in that described according to first projector distance and institute
Projected planar dimensions are stated, the screen size that adjustment projects to the projection plane includes:
Compare the projected planar dimensions and default maximum screen size, wherein the default maximum screen size is the throwing
Shadow instrument projects to the screen size of the projection plane under first projector distance,
If the projected planar dimensions are greater than or equal to the default maximum screen size, by the default maximum picture ruler
The very little screen size for being determined as projecting to the projection plane；
If the projected planar dimensions are less than the default maximum screen size, the default maximum screen size is reduced extremely
First screen size is determined as projecting to the screen size of the projection plane by the first screen size, wherein described
The difference that one screen size is equal between the projected planar dimensions or first screen size and the projected planar dimensions is small
In first threshold.
4. method for controlling projection as claimed in claim 3, which is characterized in that described to reduce the default maximum screen size extremely
First screen size includes: to keep described default when reducing default maximum screen size to first screen size
The ratio between the length of maximum screen size and width are constant.
5. a kind of projector, which is characterized in that the projector includes projecting cell, processor and depth camera；
The depth camera is connected to the processor, for obtaining the first information and the second information, wherein the first information
Including the first projector distance between the projector and projection plane, second information includes projected planar dimensions；
The processor, for adjusting the focal length of the projector lens according to first projector distance；According to described first
Projector distance and the projected planar dimensions, adjust the projector to the projection plane screen size；
The projecting cell, for according to the focal length adjusted and the screen size, Xiang Suoshu projection plane.
6. projector as claimed in claim 5, which is characterized in that the projector further includes driving motor,
The processor, for searching according to first projector distance, preset projector distance is corresponding with the focal length to be closed
System obtains focal length value corresponding with first projector distance, based on the focal length value and the focal length and displacement of focusing
Corresponding relationship obtains focusing displacement；By focusing displacement output to the driving motor；
The driving motor, for the focal length according to projector lens described in the focusing adjustment of displacement.
7. projector as claimed in claim 5, which is characterized in that
The processor, for the projected planar dimensions and default maximum screen size, wherein the default maximum is drawn
Face size is the screen size that the projector projects to the projection plane under first projector distance；
If the projected planar dimensions are greater than or equal to the default maximum screen size, by the default maximum picture ruler
The very little screen size for being determined as projecting to the projection plane；If the projected planar dimensions are less than the default maximum picture
Size then reduces the default maximum screen size to the first screen size, first screen size is determined as projecting to
The screen size of the projection plane, wherein first screen size is equal to the projected planar dimensions or first picture
Difference between face size and the projected planar dimensions is less than first threshold.
8. projector as claimed in claim 7, which is characterized in that the processor is reducing the default maximum picture ruler
When first screen size, keep the length of the default maximum screen size and the ratio between width constant.
9. the projector as described in any one of claim 5 to 8, which is characterized in that the depth camera is flight time TOF
Depth camera.
10. projector as claimed in claim 9, which is characterized in that the field range of the TOF depth camera is greater than the throwing
The field range of shadow instrument camera lens.
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| CN111123625A (en) * | 2019-12-13 | 2020-05-08 | 成都极米科技股份有限公司 | Projector and projection method |
| CN111343443A (en) * | 2020-04-27 | 2020-06-26 | 成都极米科技股份有限公司 | Optical zooming focusing method, projection device and storage medium |
| CN112687213A (en) * | 2020-12-28 | 2021-04-20 | 青岛海信激光显示股份有限公司 | Laser projection apparatus and control method thereof |
| 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 |
| CN114928729A (en) * | 2022-05-30 | 2022-08-19 | 祥越光电(湖北)有限公司 | Control method and system of projection equipment |
| CN115412710A (en) * | 2022-08-25 | 2022-11-29 | 芜湖雄狮汽车科技有限公司 | Projection method and device of vehicle-mounted projector |
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| CN112687213A (en) * | 2020-12-28 | 2021-04-20 | 青岛海信激光显示股份有限公司 | Laser projection apparatus and control method thereof |
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