CN113784102B - Thermal defocus compensation method, storage medium and projection equipment - Google Patents
Thermal defocus compensation method, storage medium and projection equipment Download PDFInfo
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- CN113784102B CN113784102B CN202110987246.2A CN202110987246A CN113784102B CN 113784102 B CN113784102 B CN 113784102B CN 202110987246 A CN202110987246 A CN 202110987246A CN 113784102 B CN113784102 B CN 113784102B
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- 238000010586 diagram Methods 0.000 description 12
- 230000009286 beneficial effect Effects 0.000 description 7
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/317—Convergence or focusing systems
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Abstract
The invention relates to a thermal defocus compensation method, which comprises the steps of obtaining a pre-stored thermal defocus curve of projection equipment; the thermal defocusing curve is obtained by acquiring parameter-time curves of parameters of a plurality of projection equipment sample machines along with the change of starting-up running time in advance and fitting the parameter-time curves of all the projection equipment sample machines; and determining a focusing scheme of the projection equipment according to the thermal defocus curve. The invention can predict the thermal defocus degree of the projection equipment in advance, and determine the projection focusing scheme in advance according to the thermal defocus degree of the projection equipment, thereby avoiding the user from seeing unclear pictures, avoiding interference with normal use of the user and improving the satisfaction degree of the user. The invention also relates to a storage medium and a projection device.
Description
Technical Field
The present invention relates to the field of projection devices, and in particular, to a thermal defocus compensation method, a storage medium, and a projection device.
Background
The projection device always has an internal temperature rise after start-up until a thermal equilibrium is reached. Therefore, before the heat balance is reached after the power-on, the size and the position of the lens barrel, the lens and other parts are slightly changed due to the expansion and contraction effect of the materials along with the rise of the internal temperature, so that the focal length of the lens is changed, the originally clear picture becomes fuzzy due to focal length drift, and the user is required to manually refocus and restore the clear picture.
The prior art has disclosed a thermal defocus compensation projector, which obtains a clear picture by arranging a temperature sensor near a lens, detecting a temperature value of the projection lens, and then sending a focusing command through a focusing motor, wherein the focusing motor drives a group of lenses to move back and forth to perform focusing action. But this approach is a compensation measure that is performed after the user has found the image unclear and the focusing process can also interfere with the user's use.
Disclosure of Invention
The invention aims to solve the technical problem of providing a thermal defocus compensation method, a storage medium and projection equipment aiming at the defects of the prior art.
The technical scheme for solving the technical problems is as follows:
a thermal defocus compensation method comprising the steps of:
Acquiring a pre-stored thermal defocus curve of the projection equipment; the thermal defocusing curve is obtained by acquiring parameter-time curves of parameters of a plurality of projection equipment sample machines along with the change of starting-up running time in advance and fitting the parameter-time curves of all the projection equipment sample machines;
and determining a focusing scheme of the projection equipment according to the thermal defocus curve.
The beneficial effects of the invention are as follows: the obtained parameter-time curves of the plurality of projection equipment sample machines are fitted to obtain a thermal defocus curve, the focusing scheme of the projection equipment is determined according to the thermal defocus curve, the thermal defocus degree of the projection equipment can be predicted in advance, the focusing scheme of the projection is determined in advance according to the thermal defocus degree of the projection equipment, the user is prevented from seeing an unclear picture, the normal use of the user is prevented from being interfered, and the satisfaction degree of the user is improved.
On the basis of the technical scheme, the invention can be improved as follows.
Further, the obtaining a parameter-time curve of the parameter of the plurality of projection equipment sample machines along with the change of the start-up running time specifically includes:
Acquiring parameter values of a plurality of projection equipment sample machines in the process from starting up to a thermal balance state according to a first preset time interval;
The thermal balance state means that in a second preset time interval, the temperature value change of the projection equipment sample machine is smaller than a preset temperature threshold value, and the projection equipment sample machine is in the thermal balance state;
and drawing the parameter-time curve by taking the time from starting up of the projection equipment sample machine to the thermal equilibrium state as an x axis and the parameter value as a y axis.
The beneficial effects of adopting the further scheme are as follows: the method comprises the steps of obtaining the parameter change of a sample machine of the projection equipment in a period from starting up to reaching a thermal equilibrium state, obtaining a parameter-time curve of the projection equipment according to the parameter of the projection equipment, accurately obtaining the thermal defocus degree of the projection equipment, and carrying out focusing compensation according to the thermal defocus degree of the projection equipment so as to avoid interference with normal use of a user.
Further, the parameters of the projection device include: image sharpness, pixel broadband, distance to move the lens to adjust the picture to maximum sharpness, and/or number of steps to move the stepper motor to adjust the picture to maximum sharpness.
The beneficial effects of adopting the further scheme are as follows: the obtained parameters of the projection equipment are not limited, different parameters can be selected according to the actual scene, and the parameter-time curve of the projection equipment is more convenient to determine.
Further, the determining a focusing scheme of the projection device according to the thermal defocus curve specifically includes:
discretizing the thermal defocus curve to obtain at least two sampling points;
Calculating the curvature of each sampling point on the thermal defocus curve;
counting the number of sampling points with curvature larger than a preset curvature;
If the number of sampling points larger than the preset curvature is larger than a preset number value, performing a first compensation focusing scheme on the projection equipment;
otherwise, a second compensation focusing scheme is carried out on the projection equipment.
The beneficial effects of adopting the further scheme are as follows: and determining a focusing scheme of the projection equipment based on the curvature of the thermal defocus curve, determining the focusing scheme according to the thermal defocus degree, accurately determining a compensation focusing scheme, and improving the efficiency of the focusing compensation scheme.
Further, the first compensation focusing scheme for the projection device specifically includes:
setting a sampling point with curvature larger than the preset curvature as a focus adjustment point;
On the thermal defocus curves, determining the on-time T i and the parameter value Y i of the projection equipment corresponding to each focusing point;
Determining a focus motor reverse compensation step number S i according to the parameter value Y i;
And driving the focusing motor to reversely compensate step number S i sequentially when the starting time of the projection equipment is T i, wherein i is a sequence number for sequencing all the focusing points according to time and i >0.
The beneficial effects of adopting the further scheme are as follows: according to the sampling point with the curvature larger than the preset curvature as the focusing point, the focusing time and the step number of the stepping motor to be adjusted can be accurately determined, normal use of a user is not interfered, and satisfaction of the user is improved.
Further, the second compensation focusing scheme for the projection device specifically includes:
determining a sampling point of which the parameter value in the thermal defocus curve is half of the peak value of the thermal defocus curve, and taking the sampling point as a focus adjustment point;
On the thermal defocus curve, determining the on-time T 1 of the projection equipment corresponding to the focusing point;
Determining the reverse compensation step number S 1 of the focusing motor according to a parameter value Y 1 corresponding to the peak value of the thermal defocus curve;
When the projection apparatus has been turned on for a time T 1, the focus motor is driven to reversely compensate for the step number S 1.
The beneficial effects of adopting the further scheme are as follows: when the thermal defocus degree of the projection equipment is low, the one-time thermal defocus compensation method can be carried out, the point corresponding to the parameter value at half of the peak value of the thermal defocus curve is determined to be used as the focus adjustment point, and when the projection equipment reaches the started time corresponding to the focus adjustment point, the stepping motor is driven to adjust the step number, so that the picture is adjusted to the highest definition, the focusing is completed before the user finds that the picture is unclear, normal use of the user is not interfered, and the satisfaction degree of the user is improved.
Further, determining the focus motor reverse compensation step number S i according to the parameter value Y i specifically includes:
When the parameter is image definition, pixel broadband or the distance of the lens to be moved for adjusting the picture to the highest definition, converting the parameter value Y i into the step number S i' of the stepping motor to be moved for adjusting the picture to the highest definition;
When the parameter is the number of steps of the step motor to be moved for adjusting the picture to the highest definition, the number of steps S i' of the step motor to be moved for adjusting the picture to the highest definition is equal to the parameter value Y i;
When i is equal to 1, the reverse compensation step number S 1 of the focusing motor is equal to the step number S 1' of the stepping motor which is required to be moved for adjusting the picture to the highest definition;
Otherwise, the number of steps S i of the focus motor reverse compensation is equal to the difference between the number of steps S i ' of the step motor to be moved for adjusting the picture to the highest definition and the number of steps S i-1 ' of the step motor to be moved for adjusting the picture to the highest definition the previous time, that is, S i＝Si'-Si-1 '.
Further, determining the focus motor reverse compensation step number S 1 according to the parameter value Y 1 corresponding to the thermal defocus curve peak value specifically includes:
When the parameter is image definition, pixel broadband or the distance of the lens to be moved for adjusting the picture to the highest definition, converting the parameter value Y 1 into the step number S 1 of the stepping motor to be moved for adjusting the picture to the highest definition;
when the parameter is the number of steps of the step motor to be moved for adjusting the picture to the highest definition, the number of steps S 1 of the step motor to be moved for adjusting the picture to the highest definition is equal to the parameter value Y 1.
Further, the present invention provides a storage medium having instructions stored therein, which when read by a computer, cause the computer to perform the thermal defocus compensation method of any one of the above embodiments.
The invention also provides a projection device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the thermal defocus compensation method of any one of the above embodiments when executing the program.
The beneficial effects of the invention are as follows: the projection equipment is provided, a thermal defocus curve can be obtained by fitting the obtained parameter-time curves of the plurality of projection equipment sample machines, the focusing scheme of the projection equipment is determined according to the thermal defocus curve, the thermal defocus degree of the projection equipment can be predicted in advance, the projection focusing scheme is determined in advance according to the thermal defocus degree of the projection equipment, the user is prevented from seeing an unclear picture, the normal use of the user is prevented from being interfered, and the satisfaction degree of the user is improved.
Additional aspects of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following description will briefly explain the embodiments of the present invention or the drawings used in the description of the prior art, and it is obvious that the drawings described below are only some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic step diagram of a thermal defocus compensation method provided by an embodiment of the present invention;
FIG. 2 is a schematic step diagram of a thermal defocus compensation method according to another embodiment of the present invention;
FIG. 3 is a schematic step diagram of a thermal defocus compensation method according to another embodiment of the present invention;
FIG. 4 is a schematic step diagram of a thermal defocus compensation method according to another embodiment of the present invention;
FIG. 5 is a schematic step diagram of a thermal defocus compensation method according to another embodiment of the present invention;
FIG. 6 is a schematic illustration of a thermal defocus curve provided by another embodiment of the present invention;
FIG. 7 is a schematic diagram of a thermal defocus curve according to another embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
As shown in a schematic step diagram of a thermal defocus compensation method provided in the embodiment of the present invention in fig. 1, the method includes the following steps:
110. Acquiring a pre-stored thermal defocus curve of the projection equipment; the thermal defocusing curve is obtained by obtaining parameter-time curves of parameters of a plurality of projection equipment sample machines along with the change of the starting-up running time in advance and fitting the parameter-time curves of all the projection equipment sample machines.
Specifically, the method for obtaining the parameters of the projection equipment sample machine can be obtained in a simulation environment or by a model machine test mode. The parameters of the projection device may be image definition, pixel broadband, distance to move the lens to adjust the frame to the highest definition, or number of steps to move the stepper motor to adjust the frame to the highest definition.
The method of fitting all parameter-time curves can be handled by Matlab or Origin tools. The application adopts the average curve of the parameter-time curves of the sample machines of all projection devices as the thermal defocus curve.
120. And determining a focusing scheme of the projection equipment according to the thermal defocus curve.
Based on the embodiment, the obtained parameter-time curves of the plurality of projection equipment sample machines are fitted to obtain the thermal defocus curve, the focusing scheme of the projection equipment is determined according to the thermal defocus curve, the thermal defocus degree of the projection equipment can be predicted in advance, the projection focusing scheme is determined in advance according to the thermal defocus degree of the projection equipment, the user is prevented from seeing unclear pictures, normal use of the user is prevented from being interfered, and the satisfaction degree of the user is improved.
As shown in a schematic step diagram of a thermal defocus compensation method according to another embodiment of the present invention shown in fig. 2, step 110 specifically includes the following steps:
210. And (5) starting.
The method refers to starting up a sample machine of the projection equipment.
220. And judging whether a first preset time interval is reached.
If yes, go to step 230; otherwise, step 220 is performed.
230. And acquiring a parameter value of a sample machine of the projection equipment.
It should be understood that the parameter value of the sample machine of the projection device may be one of selecting image definition, pixel broadband, adjusting the picture to the distance of the lens to be moved for the highest definition, or adjusting the picture to the step number of the stepping motor to be moved for the highest definition, or other parameters, and is selected according to the actual scene, which is not limited in the present application. Specifically the first preset time interval may be selected to be a time interval of 1 minute.
240. And judging whether the sample machine of the projection equipment is in a thermal balance state or not.
If yes, go to step 250; otherwise, step 220 is performed.
The temperature value change of the projection equipment is smaller than a preset temperature threshold value within a second preset time interval.
250. And drawing a parameter-time curve by taking the time from starting up to a thermal equilibrium state of the sample machine of the projection equipment as an x axis and taking a parameter value as a y axis.
Based on the embodiment, the parameter change of the projection equipment sample machine in a period from the starting up to the thermal equilibrium state is obtained, the parameter-time curve of the projection equipment sample machine is obtained according to the parameter of the projection equipment, the thermal defocus degree of the projection equipment is accurately obtained, and the focusing compensation is carried out according to the thermal defocus degree of the projection equipment, so that the normal use of a user is avoided.
As shown in a schematic step diagram of a thermal defocus compensation method according to another embodiment of the present invention shown in fig. 3, step 120 specifically includes the following steps:
310. discretizing the thermal defocus curve to obtain at least two sampling points.
320. And calculating the curvature of each sampling point on the thermal defocus curve.
330. Counting the number of sampling points with curvature larger than the preset curvature.
340. Judging whether the number of sampling points larger than the preset curvature is larger than a preset number value.
If yes, go to step 350; otherwise, step 360 is performed.
350. And carrying out a first compensation focusing scheme on the projection equipment.
360. And carrying out a second compensation focusing scheme on the projection equipment.
The preset number value may be 1 or other positive integers, and the specific number value may be determined in practical application.
Based on the embodiment, the curvature of the thermal defocus curve is adopted, the focusing scheme of the projection equipment is determined, the focusing scheme is determined according to the thermal defocus degree, the compensation focusing scheme is accurately determined, and the efficiency of the focusing compensation scheme is improved.
As shown in a schematic step diagram of a thermal defocus compensation method according to another embodiment of the present invention shown in fig. 4, step 350 specifically includes the following steps:
351. setting a sampling point larger than a preset curvature as a focus point.
352. On the thermal defocus curve, the projection apparatus on-time T i and the parameter value Y i corresponding to each focus point are determined, and the focus motor reverse compensation step number S i is determined according to the parameter value Y i.
If the parameter is image definition, pixel broadband, and the distance between the lens and the frame to be moved is required to be adjusted to the highest definition, the parameter value is converted into the number of steps of the stepping motor to be moved to adjust the frame to the highest definition according to the existing formula.
Specifically, when the parameter is image sharpness, pixel broadband, or distance to move the lens to adjust the picture to the highest sharpness, the parameter value Y i is converted into the number of steps to move the stepper motor to adjust the picture to the highest sharpness S i'.
When the parameter is the number of steps of the step motor to be moved for adjusting the picture to the highest definition, the number of steps S i' of the step motor to be moved for adjusting the picture to the highest definition is equal to the parameter value Y i;
When i is equal to 1, the focus motor reverse compensation step number S 1 is equal to the step number S 1' of the step motor to be moved to adjust the picture to the highest definition.
Otherwise, the focus motor reverse compensation step number S i is equal to the difference between the step number S i ' of the step motor to be moved to adjust the picture to the highest definition and the step number S i-1 ' of the step motor to be moved to adjust the picture to the highest definition the previous time, i.e., S i＝Si'-Si-1 '.
353. In turn, when the projection apparatus is turned on for a time of T i, the focus motor is driven to compensate for the step number S i in reverse.
Where i is a sequence number that orders all focus points by time and i >0.
Based on the above embodiment, the focusing motor includes a voice coil motor, or a stepping motor, or a servo motor, and the time of multiple focusing and the number of steps of the stepping motor to be adjusted are accurately determined according to the sampling point larger than the preset curvature as the focusing point, so that normal use of a user is not interfered, and satisfaction of the user is improved.
A schematic step diagram of a thermal defocus compensation method according to another embodiment of the present invention is shown in fig. 5, wherein step 360 specifically comprises the following steps:
361. And determining a sampling point corresponding to a half of the parameter value of the peak value of the thermal defocus curve as a focus adjustment point.
362. And determining the on-time T 1 of the projection equipment corresponding to the focusing point on the thermal defocus curve.
363. And determining the reverse compensation step number S 1 of the focusing motor according to the parameter value Y 1 corresponding to the peak value of the thermal defocus curve.
Specifically, when the parameter is image sharpness, pixel broadband, or distance to move the lens to adjust the picture to the highest sharpness, the parameter value Y 1 is converted into the number of steps to move the stepper motor to adjust the picture to the highest sharpness S 1.
When the parameter is the number of steps of the step motor to be moved for adjusting the picture to the highest definition, the number of steps S 1 of the step motor to be moved for adjusting the picture to the highest definition is equal to the parameter value Y 1.
364. When the projection apparatus has been turned on for time T 1, the focus motor is driven to compensate step number S 1 in reverse.
Based on the above embodiment, when the thermal defocus degree of the projection device is low, the one-time thermal defocus compensation method may be performed, by determining a point corresponding to a half of the parameter value of the peak value of the thermal defocus curve as the focus adjustment point, and when the projection device reaches the on time corresponding to the focus adjustment point, driving the stepper motor to adjust the number of steps, so that the picture is adjusted to the highest definition, focusing is completed before the user finds that the picture is unclear, normal use of the user is not disturbed, and satisfaction of the user is improved.
In order to implement the above-described embodiments, the present invention also proposes a non-transitory computer-readable storage medium, in which instructions, when executed by a processor, enable the processor to perform the thermal defocus compensation method proposed by the above-described embodiments of the present invention.
The embodiment of the invention provides a structural schematic diagram of a projection device, which comprises the following components: a processor, and a memory for storing instructions executable by the processor. Wherein the processor runs a program corresponding to the executable program code by reading the executable program code stored in the memory, for implementing the thermal defocus compensation method as set forth in the foregoing embodiments of the present invention.
In this embodiment, the projection apparatus may be a home theater type projector, a portable business type projector, an educational conference type projector, a mainstream engineering type projector, a professional theater type projector, or the like, and the application scene of the projection apparatus is not particularly limited in this embodiment.
According to the projection equipment provided by the embodiment, the thermal defocus curves can be obtained by fitting the acquired parameter-time curves of the plurality of projection equipment, the focusing scheme of the projection equipment is determined according to the thermal defocus curves, the thermal defocus degree of the projection equipment can be predicted in advance, the focusing scheme of the projection is determined in advance according to the thermal defocus degree of the projection equipment, the user is prevented from seeing unclear pictures, normal use of the user is prevented from being interfered, and the satisfaction degree of the user is improved.
For example, as shown in the schematic representation of the thermal defocus curve provided by another embodiment of the present invention in fig. 6.
The x-axis in the thermal defocus curve is the on-time, the y-axis is the number of steps that the focus motor needs to be moved to adjust the frame to the highest definition, the point corresponding to half 128 of the peak 248 of the thermal defocus curve in the thermal defocus curve is determined as the focus, the on-time 33 minutes of the projection device corresponding to the focus is obtained, and when the projection device has been on-time 33 minutes, the focus motor is driven to reversely compensate the number of steps 248.
For example, as shown in the schematic representation of the thermal defocus curve provided by another embodiment of the present invention of FIG. 7.
The x-axis of the thermal defocus curve is the on-time and the y-axis is the number of steps the focus motor needs to be moved to adjust the frame to maximum sharpness. When the compensation is needed n times, the counter compensation step number of the focusing motor is DeltaS 1 at the time point of DeltaT 1, and the counter compensation step number of the focusing motor is DeltaS 2 at the time point of DeltaT 2, wherein DeltaS 2 is the newly added counter compensation step number of the focusing motor.
The present invention is not limited to the above embodiments, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the present invention, and these modifications and substitutions are intended to be included in the scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (7)
1. A thermal defocus compensation method comprising the steps of:
Acquiring a pre-stored thermal defocus curve of the projection equipment, wherein the thermal defocus curve is a parameter-time curve of the parameter of the projection equipment and the started time of the projection equipment; the parameters of the projection device include: image definition, pixel broadband, distance of the lens to be moved for adjusting the picture to the highest definition or step number of the stepping motor to be moved for adjusting the picture to the highest definition; the thermal defocusing curve is obtained by obtaining parameter-time curves of parameters of a plurality of projection equipment sample machines along with the change of the starting-up running time in advance and fitting the parameter-time curves of all the projection equipment sample machines;
discretizing the thermal defocus curve to obtain at least two sampling points;
Calculating the curvature of each sampling point on the thermal defocus curve;
counting the number of sampling points with curvature larger than a preset curvature;
If the number of sampling points larger than the preset curvature is smaller than the preset number value, determining the sampling points with the parameter value being half of the peak value of the thermal defocus curve in the thermal defocus curve, and taking the sampling points as focus adjustment points;
On the thermal defocus curve, determining the on-time T 1 of the projection equipment corresponding to the focusing point;
Determining the reverse compensation step number S 1 of the focusing motor according to a parameter value Y 1 corresponding to the peak value of the thermal defocus curve;
When the projection device is started for a time T 1, driving the focusing motor to reversely compensate the step number S 1;
The method for acquiring the parameter-time curve of the parameter variation of the plurality of projection equipment sample machines along with the starting-up running time comprises the following steps:
Acquiring parameter values of a plurality of projection equipment sample machines in the process from starting up to a thermal balance state according to a first preset time interval;
The thermal balance state means that in a second preset time interval, the temperature value change of the projection equipment sample machine is smaller than a preset temperature threshold value, and the projection equipment sample machine is in the thermal balance state;
and drawing the parameter-time curve by taking the time from starting up of the projection equipment sample machine to the thermal equilibrium state as an x axis and the parameter value as a y axis.
2. The thermal defocus compensation method of claim 1, wherein determining the number of steps of the focus motor reverse compensation S 1 according to the parameter value Y 1 corresponding to the peak value of the thermal defocus curve specifically comprises:
When the parameter is image definition, pixel broadband or the distance of the lens to be moved for adjusting the picture to the highest definition, converting the parameter value Y 1 into the step number S 1 of the stepping motor to be moved for adjusting the picture to the highest definition;
when the parameter is the number of steps of the step motor to be moved for adjusting the picture to the highest definition, the number of steps S 1 of the step motor to be moved for adjusting the picture to the highest definition is equal to the parameter value Y 1.
3. The thermal defocus compensation method of claim 1, wherein if the number of sampling points having a curvature greater than a preset curvature is greater than a preset number value, setting the sampling points having a curvature greater than the preset curvature as focus adjustment points;
on the thermal defocus curves, determining the on-time T i and the parameter value Y i of the projection equipment corresponding to each focusing point;
Determining a focus motor reverse compensation step number S i according to the parameter value Y i;
And driving the focusing motor to reversely compensate step number S i sequentially when the starting time of the projection equipment is T i, wherein i is a sequence number for sequencing all the focusing points according to time and i >0.
4. A thermal defocus compensation method according to claim 3, wherein said determining a focus motor back compensation step number S i based on said parameter value Y i comprises:
When the parameter is image definition, pixel broadband or the distance of the lens to be moved for adjusting the picture to the highest definition, converting the parameter value Y i into the step number S i ' of the stepping motor to be moved for adjusting the picture to the highest definition;
When the parameter is the number of steps of the step motor to be moved for adjusting the picture to the highest definition, the number of steps S i ' of the step motor to be moved for adjusting the picture to the highest definition is equal to the parameter value Y i.
5. The method according to claim 4, wherein when i is equal to 1, the number of steps S 1 of the focus motor reverse compensation is equal to the number of steps S 1 ' of the step motor to be moved for adjusting the picture to the highest definition;
Otherwise, the number of steps S i of the focus motor reverse compensation is equal to the difference between the number of steps S i ' of the step motor to be moved for adjusting the frame to the highest definition and the number of steps S i-1 ' of the step motor to be moved for adjusting the frame to the highest definition the previous time, i.e. S i = Si ' - Si-1 '.
6. A storage medium having instructions stored therein which, when read by a computer, cause the computer to perform the thermal defocus compensation method of any one of claims 1-5.
7. Projection device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the thermal defocus compensation method according to any one of claims 1-5 when executing the program.
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| CN113596421A (en) | 2021-11-02 |
| CN110784698B (en) | 2021-09-21 |
| CN110784698A (en) | 2020-02-11 |
| CN113784102A (en) | 2021-12-10 |
| CN113596421B (en) | 2024-05-14 |
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