CN117082221A - Color temperature adjusting method, device, medium and projection equipment - Google Patents
Color temperature adjusting method, device, medium and projection equipment Download PDFInfo
- Publication number
- CN117082221A CN117082221A CN202311246470.1A CN202311246470A CN117082221A CN 117082221 A CN117082221 A CN 117082221A CN 202311246470 A CN202311246470 A CN 202311246470A CN 117082221 A CN117082221 A CN 117082221A
- Authority
- CN
- China
- Prior art keywords
- projection
- color temperature
- target
- temperature adjustment
- picture
- 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
- 238000000034 method Methods 0.000 title claims abstract description 46
- 230000008859 change Effects 0.000 claims description 26
- ORFSSYGWXNGVFB-UHFFFAOYSA-N sodium 4-amino-6-[[4-[4-[(8-amino-1-hydroxy-5,7-disulfonaphthalen-2-yl)diazenyl]-3-methoxyphenyl]-2-methoxyphenyl]diazenyl]-5-hydroxynaphthalene-1,3-disulfonic acid Chemical compound COC1=C(C=CC(=C1)C2=CC(=C(C=C2)N=NC3=C(C4=C(C=C3)C(=CC(=C4N)S(=O)(=O)O)S(=O)(=O)O)O)OC)N=NC5=C(C6=C(C=C5)C(=CC(=C6N)S(=O)(=O)O)S(=O)(=O)O)O.[Na+] ORFSSYGWXNGVFB-UHFFFAOYSA-N 0.000 claims description 19
- 238000004590 computer program Methods 0.000 claims description 9
- 230000004044 response Effects 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 description 8
- 230000001960 triggered effect Effects 0.000 description 8
- 238000004364 calculation method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 239000004973 liquid crystal related substance Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000003384 imaging method Methods 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000002688 persistence Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- 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]
- H04N9/3179—Video signal processing therefor
- H04N9/3182—Colour adjustment, e.g. white balance, shading or gamut
-
- 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]
- H04N9/3191—Testing thereof
- H04N9/3194—Testing thereof including sensor feedback
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Video Image Reproduction Devices For Color Tv Systems (AREA)
Abstract
The invention relates to a color temperature adjusting method, a device, a medium and a projection device, and relates to the technical field of projection devices.
Description
Technical Field
The disclosure relates to the technical field of projection equipment, and in particular relates to a color temperature adjusting method, a device, a medium and projection equipment.
Background
Currently, projection devices generally have a color temperature adjustment mode to adaptively adjust the color temperature of the projection device. However, if the projection device frequently enables the color temperature adjustment mode, the viewing experience of the user may be affected. Therefore, how to determine the timing of the color temperature adjustment performed by the projection device is a technical problem to be solved.
Disclosure of Invention
The disclosure discloses a color temperature adjusting method, a device, a medium and projection equipment, which can realize the adjustment of the color temperature of a projection picture by adopting different modes.
In a first aspect, the present disclosure relates to a color temperature adjustment method, comprising:
determining target brightness information of a projection area, wherein the target brightness information is brightness information of the projection area when a projection device is in picture blanking time, and the picture blanking time is interval time of the projection device for projecting two adjacent frames of projection pictures;
and determining whether to execute the noninductive color temperature adjustment operation according to the target brightness information so as to adjust the color temperature of a projection picture projected by the projection equipment.
Optionally, the method further comprises:
determining a second target color value according to the target brightness information and a first target color value stored in the projection device in advance under the condition that the non-sensing color temperature adjustment operation is determined to be executed, wherein the first target color value comprises color values corresponding to diffuse reflection light formed in the projection area by a pure red picture, a pure blue picture and a pure green picture projected by the projection device;
and executing the noninductive color temperature adjustment operation according to the second target color value and the target brightness information.
Optionally, the determining whether to perform the noninductive color temperature adjustment operation according to the target brightness information includes:
and determining to execute the noninductive color temperature adjustment operation under the condition that the target brightness information meets the preset condition.
Optionally, the preset condition includes that a difference value between the currently determined target brightness information and the last determined target brightness information is not within a preset interval range.
Optionally, the method further comprises:
in the case where the size of the projection area and/or the projection screen is changed, it is determined to perform a perceived color temperature adjustment operation to adjust the color temperature of the projection screen projected by the projection apparatus.
Optionally, the determining to perform the perceived color temperature adjustment operation in a case where the size of the projection area and/or the projection screen is changed includes:
outputting a prompt option for prompting a user whether to execute a perceived color temperature adjustment operation or not under the condition that the size of the projection area and/or the projection picture is changed;
and in response to a selected operation of the prompt option, determining to execute a perceived color temperature adjustment operation.
Optionally, the method comprises:
Determining position change information of the projection device;
and determining that the size of the projection area and/or the projection picture changes under the condition that the position change information represents that the position of the projection equipment changes.
Optionally, the perceived color temperature adjustment operation is configured to adjust the color temperature of the projection screen according to a first target color value and a third target color value, where the first target color value includes a color value corresponding to diffuse reflection light formed in a projection area by a pure red screen, a pure blue screen, and a pure green screen, and the third target color value includes a color value corresponding to diffuse reflection light formed in the projection area by a pure black screen, which is projected by the projection device.
In a second aspect, the present disclosure relates to a color temperature adjustment device comprising:
the first determining module is configured to determine target brightness information of a projection area, wherein the target brightness information is brightness information of the projection area when the projection equipment is in picture blanking time, and the picture blanking time is interval time of two adjacent frames of projection pictures projected by the projection equipment;
and a second determining module configured to determine whether to perform a noninductive color temperature adjustment operation according to the target brightness information so as to adjust the color temperature of a projection picture projected by the projection device.
In a third aspect, the present disclosure relates to a computer storage medium having stored thereon a computer program which, when executed by a processing device, implements the steps of the method according to any of the first aspects.
In a fourth aspect, the present disclosure relates to a projection device comprising:
a storage device having a computer program stored thereon;
processing means for executing said computer program in said storage means to carry out the steps of the method according to any one of the first aspects.
The disclosure relates to a color temperature adjustment method, a device, a medium and projection equipment. According to the method, when the projection equipment is in the picture blanking time, the target brightness information of the projection area is acquired, whether the noninductive color temperature adjustment operation is executed or not is determined based on the target brightness information, whether the noninductive color temperature adjustment operation is triggered or not can be determined according to whether the ambient light brightness of the use environment where the projection equipment is located is changed or not, and therefore the fact that the projection equipment frequently starts a color temperature adjustment mode to adjust the color temperature of a projection picture is avoided, and the experience of a user using the projection equipment is greatly improved.
Drawings
The above and other features, advantages, and aspects of embodiments of the present disclosure will become more apparent by reference to the following detailed description when taken in conjunction with the accompanying drawings. The same or similar reference numbers will be used throughout the drawings to refer to the same or like elements. It should be understood that the figures are schematic and that elements and components are not necessarily drawn to scale. In the drawings:
Fig. 1 is a flowchart illustrating a color temperature adjustment method according to an exemplary embodiment.
Fig. 2 is a schematic diagram illustrating a picture blanking time according to an exemplary embodiment.
Fig. 3 is a flowchart illustrating performing a noninductive color temperature adjustment operation according to a second target color value and target luminance information, according to an exemplary embodiment.
Fig. 4 is a flowchart illustrating a color temperature adjustment method according to another exemplary embodiment.
Fig. 5 is a schematic diagram showing a module connection of a color temperature adjusting apparatus according to an exemplary embodiment.
Fig. 6 is a schematic diagram of a structure of a projection apparatus according to an exemplary embodiment.
Detailed Description
Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present disclosure have been shown in the accompanying drawings, it is to be understood that the present disclosure may be embodied in various forms and should not be construed as limited to the embodiments set forth herein, but are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are for illustration purposes only and are not intended to limit the scope of the present disclosure.
It should be understood that the various steps recited in the method embodiments of the present disclosure may be performed in a different order and/or performed in parallel. Furthermore, method embodiments may include additional steps and/or omit performing the illustrated steps. The scope of the present disclosure is not limited in this respect.
The term "including" and variations thereof as used herein are intended to be open-ended, i.e., including, but not limited to. The term "based on" is based at least in part on. The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments. Related definitions of other terms will be given in the description below.
It should be noted that the terms "first," "second," and the like in this disclosure are merely used to distinguish between different devices, modules, or units and are not used to define an order or interdependence of functions performed by the devices, modules, or units.
It should be noted that references to "one", "a plurality" and "a plurality" in this disclosure are intended to be illustrative rather than limiting, and those of ordinary skill in the art will appreciate that "one or more" is intended to be understood as "one or more" unless the context clearly indicates otherwise.
The names of messages or information interacted between the various devices in the embodiments of the present disclosure are for illustrative purposes only and are not intended to limit the scope of such messages or information.
Fig. 1 is a flowchart illustrating a color temperature adjustment method according to an exemplary embodiment. As shown in fig. 1, the embodiment of the disclosure provides a color temperature adjustment method, which may be performed by a projection apparatus, and in particular, may be performed by a color temperature adjustment device, which may be implemented by software and/or hardware, and configured in the projection apparatus. As shown in fig. 1, the method may include the following steps.
In step 110, the target brightness information of the projection area is determined, where the target brightness information is the brightness information of the projection area when the projection device is in a frame blanking time, and the frame blanking time is an interval time when the projection device projects two adjacent frames of projection images.
Here, the projection area refers to an area for carrying a projection screen. The projection area may be a wall surface, a curtain, or the like. The target luminance information of the projection area is luminance information of the projection area when the projection apparatus is in the picture blanking time.
It should be noted that, when the projection device projects two adjacent frames of projection pictures, there is an interval time between two adjacent frames of projection pictures, and the projection device does not project any content during the interval time. At this time, in the case where the projection apparatus does not project light, the target luminance information is collected by the luminance sensor. Because the light interference projected by the projection equipment does not exist, the acquired target brightness information is the environment brightness corresponding to the use environment of the projection equipment. I.e. the target brightness information actually reflects the ambient light brightness corresponding to the use environment of the projection device.
In addition, it should be noted that the projection device collects the target brightness information during normal operation. That is, the projection apparatus can collect the target brightness information in real time through the brightness sensor during the projection of the projection picture.
Projection devices are typically based on alternate display of RGB lamps in time sharing, which, in combination with the persistence effect of the human eye, display various colors. In a physical sense, the picture blanking time refers to the end time of the last falling edge of the first RGB period to the start time of the first rising edge of the second RGB period in two adjacent RGB periods.
Within one RGB period, the duty cycle of the red primary light source (R), the duty cycle of the green primary light source (G), and the duty cycle of the blue primary light source (B) are included. Each RGB period is a display valid period, i.e., a period within which a user can view a projection screen. Fig. 2 is a schematic diagram illustrating a picture blanking time according to an exemplary embodiment. As shown in fig. 2, each RGB period is a display valid period, and there is a picture blanking time between the first RGB period and the second RGB period. I.e. the time interval between the end time of the B duty cycle of the first RGB period and the start time of the R duty cycle of the second RGB period is the picture blanking time.
It should be noted that the picture blanking time shown in fig. 2 is only used as an example for illustration, and in the practical application, the picture blanking time may be changed depending on the RGB order and period used by the projection device hardware.
In some embodiments, the brightness sensor may be activated and the target brightness information obtained by the brightness sensor with the projection device in a picture blanking time.
The brightness sensor can work intermittently, i.e. when the projection equipment is in the picture blanking time, the brightness sensor is started to collect the target brightness information once. When the projection device is not in the picture blanking time, the brightness sensor is turned off.
It should be understood that, since the setting position of the brightness sensor on the projection device is toward the projection area, the target brightness information acquired during the frame blanking time may represent a color value corresponding to diffuse reflection light formed in the projection area by the current ambient light corresponding to the use environment of the projection device.
In step 120, it is determined whether to perform a non-perceived color temperature adjustment operation to adjust the color temperature of a projection screen projected by the projection apparatus, based on the target luminance information.
Here, in the case where the target brightness information characterizes a change in the current ambient light brightness of the use environment of the projection apparatus, the projection apparatus is triggered to perform the noninductive color temperature adjustment operation. And under the condition that the target brightness information represents that the current ambient light brightness of the use environment of the projection equipment is not changed, the projection equipment is not triggered to execute the noninductive color temperature adjustment operation.
The noninductive color temperature adjustment operation refers to adjusting the color temperature of a projection picture under the condition that the user does not perceive the operation. For example, the perceived color temperature adjustment operation may be to project a pure red screen, a pure blue screen, a pure green screen, and a pure black screen to a projection area to acquire parameters for color temperature adjustment, and perform the color temperature adjustment operation based on the parameters. And the noninductive color temperature adjustment operation may be a color temperature adjustment operation by the target brightness information acquired by the brightness sensor. Therefore, the main difference between the noninductive color temperature adjustment operation and the sensible color temperature adjustment operation is whether the user can feel that the projection apparatus is performing the color temperature adjustment operation.
It should be noted that, whether the noninductive color temperature adjustment operation or the sensible color temperature adjustment operation is performed, the color temperature of the projection screen projected by the projection apparatus is adjusted to the target color temperature.
Therefore, when the projection equipment is in the picture blanking time, the target brightness information of the projection area is acquired, and whether the noninductive color temperature adjustment operation is executed or not is determined based on the target brightness information, and whether the noninductive color temperature adjustment operation is triggered or not can be determined according to whether the ambient brightness of the use environment where the projection equipment is positioned is changed or not, so that the situation that the projection equipment frequently starts a color temperature adjustment mode to adjust the color temperature of a projection picture is avoided, and the experience of a user using the projection equipment is greatly improved.
In some possible embodiments, in the case where it is determined to perform the noninductive color temperature adjustment operation, the second target color value may be determined according to the target brightness information and the first target color value stored in the projection device in advance, and the noninductive color temperature adjustment operation may be performed according to the second target color value and the target brightness information.
Here, the first target color value includes color values corresponding to diffuse reflection light formed in the projection area by the pure red screen, the pure blue screen, and the pure green screen projected by the projection apparatus.
The first target color value may be data collected by the projection device when performing the perceived color temperature adjustment operation. For example, the projection device may perform the perceived color temperature adjustment operation by default upon power-up. Power-on-power-on refers to the projection device powering on from no power to power-on. The projection device is in a sleep state, a dormant state or only turns off the light source, and is not powered on. Of course, the projection apparatus may also perform the perceived color temperature adjustment operation during the operation of the projection apparatus.
The perceived color temperature adjustment operation is to adjust the color temperature of the projected picture according to the first target color value and the third target color value. The first target color value comprises a color value corresponding to diffuse reflection light formed by a pure red picture, a pure blue picture and a pure green picture projected by the projection device in a projection area, and the third target color value comprises a color value corresponding to diffuse reflection light formed by a pure black picture projected by the projection device in the projection area.
That is, the perceived color temperature adjustment operation is: the projection equipment respectively projects a pure red picture, a pure blue picture and a pure green picture to a projection area, and then acquires color values corresponding to diffuse reflection light formed by the pure red picture, the pure blue picture and the pure green picture in the projection area through a color/brightness sensor to obtain a first target color value; the projection equipment projects a pure black picture to the projection area, and acquires a color value corresponding to diffuse reflection light formed by the pure black picture in the projection area through a color/brightness sensor to obtain a third target color value; then, the projection device adjusts the color temperature of the projection picture according to the first target color value and the third target color value.
Thus, after the projection device has performed a perceived color temperature adjustment operation, the acquired first target color value and third target color value may be stored in the projection device. In the case where the projection apparatus determines to perform the noninductive color temperature adjustment operation, the projection apparatus may determine the second target color value based on the first target color value and the target luminance information stored in advance, and perform the noninductive color temperature adjustment operation based on the second target color value and the target luminance information.
For example, when the projection device is powered on, a perceived color temperature adjustment operation may be performed to obtain a first target color value and a third target color value. If the projection device executes the perceived color temperature adjustment search again in the operation process of the projection device to obtain a new first target color value and a new third target color value, the new first target color value and the new third target color value are stored.
It should be noted that, according to the light mixing principle, the first target color value is actually superimposed with the color value of the ambient light, that is, the diffuse reflection light formed by the pure red, pure blue and pure green frames in the projection area includes the color values of the pure red, pure blue and pure green frames, as well as the color value of the ambient light. Since the target brightness information actually reflects the ambient light brightness corresponding to the use environment of the projection device, the second target color value is actually the color value of diffuse reflection light formed by the pure red picture, the pure blue picture and the pure green picture in the projection area and filtered out the ambient light.
Wherein the target brightness information is coordinates of the ambient light in the XYZ color system. For example, the target brightness information may be expressed as X D 、Y D 、Z D . The first target color value refers to coordinates of diffuse reflection light corresponding to a pure red picture, a pure blue picture and a pure green picture in an XYZ color system. The second target color value refers to the coordinates of the diffuse reflection light corresponding to the pure red image, the pure blue image and the pure green image in the XYZ color system after filtering the ambient light.
For example, the second target color value may be determined from a difference between the first target color value and the target luminance information.
For example, the first target color value corresponding to the pure red picture is represented as X R 、Y R 、Z R The second target color value corresponding to the pure red picture is: x'. R ＝X R -X D 、Y′ R ＝Y R -X D 、Z′ R ＝Z R -Z D . The first target color value corresponding to the pure green picture is expressed as X G 、Y G 、Z G The second target color value corresponding to the pure green picture is: x'. G ＝X G -X D 、Y′ G ＝Y G -X D 、Z′ G ＝Z G -Z D . The first target color value corresponding to the pure blue picture is expressed as X B 、Y B 、Z B The second target color value corresponding to the pure blue picture is: x'. B ＝X B -X D 、Y′ B ＝Y B -X D 、Z′ B ＝Z B -Z D 。
Fig. 3 is a flowchart illustrating performing a noninductive color temperature adjustment operation according to a second target color value and target luminance information, according to an exemplary embodiment. As shown in fig. 3, the noninductive color temperature adjustment operation may be performed by the following steps.
In step 310, a color look-up table is determined based on the second target color value, wherein the color look-up table includes fourth target color values corresponding to the second target color value at different digital signal amplitudes.
Here, a color lookup Table (LUT) is used to output one set of RGB values as another set of RGB values, thereby changing the color of the projection screen. The color look-up table actually includes fourth target color values corresponding to the second target color values at different digital signal amplitudes (IREs), i.e., fourth target color values corresponding to the second target color values at all IREs are traversed.
Taking gamma2.2 as an example, the fourth target color value may be calculated by the following calculation formula:
wherein X 'is' R (IRE)、Y′ R (IRE)、Z′ R (IRE) is the second target color value X' R 、Y′ R 、Z′ R Fourth target color value, X ', at different IRE' G (IRE)、Y′ G (IRE)、Z′ G (IRE) is the second target color value X' G 、Y′ G 、Z′ G Fourth target color value, X ', at different IRE' B (IRE)、Y′ B (IRE)、Z′ B (IRE) is the second target color value X' B 、Y′ B 、Z′ B Fourth target color values at different IRE.
It should be noted that, since the second target color value is a color value of filtered ambient light, the fourth target color value in the color lookup table is also a color value of filtered ambient light.
In step 320, the fourth target color value in the color lookup table is corrected according to the target brightness information, and a corrected color lookup table is obtained.
Here, since the fourth target color value in the color lookup table is a color value of filtering ambient light, in the actual use process, the influence of the real-time ambient light on the color temperature of the projection screen needs to be considered. Therefore, the fourth target color value in the color lookup table can be corrected through the target brightness information, and the corrected color lookup table is obtained. The color values in the corrected color lookup table include both ambient light and factors affecting the color of the projection area and the size of the projection picture.
Illustratively, for X 'in the color look-up table' R (IRE)、Y′ R (IRE)、Z′ R (IRE), the correction can be performed by the following calculation formula:
wherein X 'is' R (IRE R )、Y′ R (IRE R ) Z's' R (IRE R ) For modified X' R (IRE)、Y′ R (IRE)、Z′ R (IRE)。
Similarly, for X 'in the color look-up table' G (IRE)、Y′ G (IRE)、Z′ G (IRE) corresponds to corrected X' G (IRE R )、Y′ G (IRE R )、Z′ G (IRE R ) X 'in a color look-up table' B (IRE)、Y′ B (IRE)、Z′ B (IRE) corresponds to corrected X' B (IRE R )、Y′ B (IRE R )、Z′ B (IRE R ) The color lookup table after correction can be obtained by correcting the color lookup table by the calculation formula.
In step 330, a target digital signal amplitude corresponding to the target color temperature is determined according to the target color temperature and the corrected color lookup table.
Here, the target color temperature may refer to a color temperature of a projection screen set by a user. The target color temperature may be represented by color coordinates. For example, the target color temperature is expressed as x w 、y w 。
Illustratively, the target digital signal amplitude may be calculated by the following target calculation formula:
it should be noted that the above calculation formula is actually that X 'corresponding to IRE conforming to the above calculation formula is found in the corrected color lookup table' R (IRE R )、Y′ R (IRE R )、Z′ R (IRE R )、X′ G (IRE R )、Y′ G (IRE R )、Z′ G (IRE R )、X′ B (IRE R )、Y′ B (IRE R )、Z′ B (IRE R )。
In step 340, the color temperature of the projection device is adjusted based on the target digital signal amplitude.
Here, after the target digital signal amplitude is calculated, the projection apparatus is controlled to project with the target digital signal amplitude, and the color temperature of the projection screen is adjusted to the target color temperature.
By determining the second target color value according to the target brightness information and the first target color value stored in the projection device in advance and executing the noninductive color temperature adjustment operation according to the second target color value and the target brightness information, the color temperature of the projection picture can be adjusted in a noninductive mode under the condition that the environment brightness of the running environment of the projection device changes and the watching experience of a user is not affected.
In some possible embodiments, the noninductive color temperature adjustment operation is determined to be performed in a case where the target luminance information satisfies a preset condition.
Here, the projection apparatus may periodically determine target luminance information of the projection area, and when the determined target luminance information satisfies a preset condition, determine to trigger execution of the noninductive color temperature adjustment operation to adjust the color temperature of the projection screen. It should be understood that the target brightness information meeting the preset condition means that the ambient light brightness of the operating environment of the projection device changes significantly, so that the color temperature of the projection screen needs to be adjusted.
As some examples, the preset condition may include that a difference between the currently determined target luminance information and the last determined target luminance information is not within a preset interval range.
The difference value between the currently determined target brightness information and the last determined target brightness information is within a preset interval range, which indicates that the ambient light brightness of the running environment of the projection equipment is not changed obviously, and the operation of adjusting the noninductive color temperature is not needed to be executed. The difference between the currently determined target brightness information and the last determined target brightness information is not within the preset interval range, which means that the ambient light brightness of the operating environment of the projection device has significantly changed, and then the noninductive color temperature adjustment operation needs to be performed.
It should be noted that the preset interval range may be a range value. Of course, the preset interval range may be a point value. For example, the preset interval range may take a value of 0.
In other embodiments, the preset condition may also include that the difference between the target brightness information acquired continuously and repeatedly and the target brightness information determined last time is not within the preset interval range. For example, the target brightness information determined last time is the target brightness information acquired for the first time, three times of target brightness information are acquired continuously, and if the difference between the acquired three times of target brightness information and the target brightness information acquired for the first time is not within the preset interval range, the noninductive color temperature adjustment operation is triggered.
Therefore, by determining to execute the noninductive color temperature adjustment operation under the condition that the target brightness information meets the preset condition, whether the noninductive color temperature adjustment operation is triggered can be determined according to whether the ambient light brightness of the running environment of the projection equipment is changed, so that the frequent triggering of the color temperature adjustment operation is avoided, and the watching experience of a user is ensured.
In some implementations, in the event that the size of the projection area and/or the projected picture changes, it is determined to perform a perceived color temperature adjustment operation to adjust the color temperature of the projected picture projected by the projection device.
Here, the projection apparatus may detect whether the size of the projection area and/or the projection screen is changed, and determine to perform the perceived color temperature adjustment operation in the case where the size of the projection area and/or the projection screen is changed, in addition to detecting the target luminance information and determining whether to trigger the perceived color temperature adjustment operation based on the target luminance information.
It should be noted that the change of the projection area is understood as that the user adjusts the pose of the projection device, resulting in the change of the projection area. When the projection area changes, it is indicated that the color of the projection area may change, and then a perceived color temperature adjustment operation needs to be performed to redetermine the first target color value. The change in the size of the projection screen may mean that the frame of the projection screen changes, and when the size of the projection screen changes, the area carrying the projection screen also changes, and at this time, a perceived color temperature adjustment operation needs to be performed to redetermine the first target color value.
In some embodiments, the projection area and/or the projection screen may be photographed by a photographing device provided on the projection apparatus, and whether the size of the projection area and/or the projection screen is changed may be determined according to the photographed image.
It should be appreciated that the perceived color temperature adjustment operation is to adjust the color temperature of the projected picture based on the first target color value and the third target color value.
Wherein the third target color value actually refers to coordinates of the ambient light in the XYZ color system, and the third target color value can be expressed as X Dl 、Y D1 、Z D1 . Due to the principle of mixing of light, the first target color value actually superimposes the color value of the ambient light, a fifth target color value can be determined from the difference between the first target color value and the third target color value. The fifth target color value is a color value of diffuse reflection light formed by a pure red picture, a pure blue picture and a pure green picture which are projected by the projection device in a projection area after the ambient light is filtered. Then, the perceived color temperature adjustment operation may be performed by using the fifth target color value as the second target color value and the third target color value as the target luminance information in combination with the above steps 310 to 340 to adjust the color temperature of the projection screen projected by the projection apparatus.
Therefore, the perceived color temperature adjustment operation is determined to be executed under the condition that the size of the projection area and/or the projection picture is changed, so that the projection equipment can trigger the perceived color temperature adjustment operation under the condition that the size of the projection area and/or the projection picture is changed, and the watching experience of a user is prevented from being influenced. In the case where the size of the projection area and the projection screen is not changed, it is possible to determine whether or not to perform the noninductive color temperature adjustment operation based on the target luminance information, thereby avoiding the color temperature of the projection screen from being adjusted by the noninductive color temperature adjustment operation at all times.
In some implementations, where the projected area and/or the projected screen size changes, a prompt option may be output and responsive to selection of the prompt option, a perceived color temperature adjustment operation may be determined to be performed.
Here, the prompt option is used to prompt the user whether to perform the perceived color temperature adjustment operation. For example, the projection apparatus may output a prompt content of "whether a change in the projection environment is detected, or whether a perceived color temperature adjustment operation is performed, to adjust the color temperature of the projection screen", and prompt options of "yes" and "no".
When the user clicks the prompt option of "yes", it is determined to perform a perceived color temperature adjustment operation. Of course, the user can also set the target color temperature of the projection screen by himself before the perceived color temperature adjustment operation is performed.
It should be noted that the projection device may project the prompt option to the projection area, or may output the prompt option by sending information to a mobile terminal associated with the projection device.
Thus, by outputting the prompt option, the user can autonomously select whether to perform the perceived color temperature adjustment operation.
In some implementations, the projection device may determine positional change information for the projection device and determine that the size of the projection area and/or the projected screen changes if the positional change information characterizes a change in the position of the projection device.
Here, the projection device may determine the position change information of the projection device by an acceleration sensor, a gyroscope, or the like. The position change information of the projection device may refer to a change amount between position information detected at the current time and position information detected at the previous time.
When the position change information indicates that the position of the projection device is changed, it indicates that the projection device is moved, and the size of the projection area and/or the projection screen is changed, at this time, the perceived color temperature adjustment operation may be triggered.
It should be noted that, if the amount of change between the position information detected at the current time and the position information detected at the previous time is not within the preset range, it indicates that the position of the projection device is changed. The preset range may be a range value. Of course, the preset range may be a point value. For example, the preset range may take on a value of 0.
Thus, by the position change information of the projection apparatus, whether the size of the projection area and/or the projection screen is changed or not can be accurately determined with minimum costs.
Fig. 4 is a flowchart illustrating a color temperature adjustment method according to another exemplary embodiment. As shown in fig. 4, the color temperature adjustment method may include the following steps.
S401, starting up the projection equipment;
s402, judging whether the power-on state is powered on; step S403 is executed when the power-on is turned on, and step S404 and step S407 are executed when the power-on is not turned on;
s403, executing a perceived color temperature adjustment operation
S404, determining target brightness information;
s405, judging whether the target brightness information meets a preset condition; in the case that the preset condition is satisfied, step S406 is performed;
s406, performing a noninductive color temperature adjustment operation;
S407, determining position change information of the projection device;
s408, judging whether the position change information represents that the position of the projection equipment is changed; in the case where the position characterizing the projection device is changed, step S403 is performed.
It should be noted that, in the above embodiment, whether to perform the noninductive color temperature adjustment operation is determined according to the target brightness information, or if the target brightness information satisfies the preset condition in the case that the size of the projection area and/or the projection screen is not changed, the noninductive color temperature adjustment operation is determined to be performed. If the size of the projection area and/or the projection screen changes, a perceived color temperature adjustment operation may be triggered.
In the practical application process, the projection equipment is powered on, a sensitive color temperature adjustment operation can be executed once, during the use period of the projection equipment, the projection equipment can periodically detect whether the size of a projection area and/or a projection picture changes or not, and detect whether target brightness information meets preset conditions or not, when the target brightness information meets the preset conditions, the non-sensitive color temperature adjustment operation is executed, and when the size of the projection area and/or the projection picture changes, the sensitive color temperature adjustment operation is executed.
Fig. 5 is a schematic diagram showing a module connection of a color temperature adjusting apparatus according to an exemplary embodiment. As shown in fig. 5, an embodiment of the present disclosure provides a color temperature adjusting apparatus 500, including:
a first determining module 501 configured to determine target brightness information of a projection area, where the target brightness information is brightness information of the projection area when a projection device is in a frame blanking time, and the frame blanking time is an interval time when the projection device projects two adjacent frames of projection images;
the second determining module 502 is configured to determine whether to perform a noninductive color temperature adjustment operation according to the target brightness information so as to adjust the color temperature of a projection picture projected by the projection device.
Optionally, the color temperature adjusting apparatus 500 further includes:
a third determining module configured to determine a second target color value according to the target brightness information and a first target color value stored in the projection device in advance, wherein the first target color value comprises color values corresponding to diffuse reflection light formed in the projection area by a pure red picture, a pure blue picture and a pure green picture projected by the projection device, when the noninductive color temperature adjustment operation is determined to be executed;
And the execution module is configured to execute the noninductive color temperature adjustment operation according to the second target color value and the target brightness information.
Optionally, the second determining module 502 is specifically configured to:
and determining to execute the noninductive color temperature adjustment operation under the condition that the target brightness information meets the preset condition.
Optionally, the preset condition includes that a difference value between the currently determined target brightness information and the last determined target brightness information is not within a preset interval range.
Optionally, the color temperature adjusting apparatus 500 further includes:
and a fourth determination module configured to determine to perform a perceived color temperature adjustment operation to adjust a color temperature of a projection screen projected by the projection apparatus in a case where a size of the projection area and/or the projection screen is changed.
Optionally, the fourth determining module is specifically configured to:
outputting a prompt option for prompting a user whether to execute a perceived color temperature adjustment operation or not under the condition that the size of the projection area and/or the projection picture is changed;
and in response to a selected operation of the prompt option, determining to execute a perceived color temperature adjustment operation.
Optionally, the fourth determining module includes:
a position determining unit configured to determine position change information of the projection apparatus;
and a change determining unit configured to determine that the size of the projection area and/or the projection screen is changed in a case where the position change information characterizes a change in the position of the projection apparatus.
Optionally, the perceived color temperature adjustment operation is configured to adjust the color temperature of the projection screen according to a first target color value and a third target color value, where the first target color value includes a color value corresponding to diffuse reflection light formed in a projection area by a pure red screen, a pure blue screen, and a pure green screen, and the third target color value includes a color value corresponding to diffuse reflection light formed in the projection area by a pure black screen, which is projected by the projection device.
With respect to the color temperature adjusting apparatus 500 in the above embodiment, the method logic executed by each functional module is described in detail in the portions related to the method, and is not described herein again.
The present disclosure also provides a computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the steps of the color temperature adjustment method provided by the present disclosure.
The embodiment of the disclosure also provides a chip, which comprises a processor and an interface; the processor is configured to read instructions to perform the steps of the color temperature adjustment method as described in the above embodiments.
The embodiment of the disclosure also provides a projection device, including:
a storage device having a computer program stored thereon;
processing means for executing the computer program in the storage means to implement the steps of the color temperature adjustment method provided in the above embodiment.
Fig. 6 is a schematic diagram of a structure of a projection apparatus according to an exemplary embodiment. As shown in fig. 6, the projection apparatus 200 includes a projection section 210 and a driving section 220 that drives the projection section 210. The projection section 210 may form an optical image and project the optical image onto the imaging medium SC.
The projection unit 210 includes a light source unit 211, a light modulator 212, and an optical system 213. The driving section 220 includes a light source driving section 221 and a light modulator driving section 222.
The light source part 211 may include a solid light source such as a light emitting diode (Light Emitting Diode, LED), a laser, a pump lamp, and the like. The light source portion 211 may include an optical element such as a lens or a polarizing plate for improving optical characteristics of the projected light, a light control element for controlling the luminous flux, and the like.
The light source driving part 221 may control the light source operation in the light source part 211, including turning on and off, according to the instruction of the control part 250.
The light modulator 212 includes a display panel 215, and the display panel 215 may be a transmissive liquid crystal panel (Liquid Crystal Display, LCD), a reflective liquid crystal on silicon panel (Liquid Crystal on Silicon, LCOS), or a digital micromirror device (Digital Micromirror Device, DMD).
The light modulator 212 is driven by a light modulator driving section 222, and the light modulator driving section 222 is connected to an image processing section 245.
The image processing section 245 inputs image data to the light modulator driving section 222. The light modulator driving unit 222 converts the input image data into a data signal suitable for the operation of the display panel 215. The light modulator driving unit 222 applies a voltage to each pixel of each display panel 215 based on the converted data signal, and draws an image on the display panel 215.
The optical system 213 includes a lens, a mirror, or the like that images the incident image light PLA on the imaging medium SC. The optical system 213 may also include a zoom mechanism that enlarges or reduces an image projected onto the imaging medium SC, a focus adjustment mechanism that performs focus adjustment, and the like.
The projection apparatus 200 further includes an operation section 231, a signal receiving section 233, an input interface 235, a storage section 237, a data interface 241, an interface section 242, a frame memory 243, an image processing section 245, and a control section 250. The input interface 235, the storage unit 237, the data interface 241, the interface unit 242, the image processing unit 245, and the control unit 250 can communicate data with each other via the internal bus 207.
The operation unit 231 may generate corresponding operation signals according to operations of various buttons and switches acting on the surface of the housing of the projection apparatus 200, and output the operation signals to the input interface 235. The input interface 235 includes a circuit that outputs an operation signal input from the operation section 231 to the control section 250.
After receiving a signal (e.g., infrared signal, bluetooth signal) sent from the control device 5 (e.g., remote controller), the signal receiving unit 233 may decode the received signal to generate a corresponding operation signal. The signal receiving unit 233 outputs the generated operation signal to the input interface 235. The input interface 235 outputs the received operation signal to the control section 250.
The storage unit 237 may be a magnetic recording device such as a Hard Disk Drive (HDD) or a storage device using a semiconductor memory element such as a flash memory. The storage unit 237 stores a program executed by the control unit 250, data processed by the control unit 250, image data, and the like.
The data interface 241 includes a connector and interface circuitry that can be wired to other electronic devices 100. The data interface 241 may be a communication interface that performs communication with other electronic devices 100. The data interface 241 receives image data, sound data, and the like from the other electronic device 100. In the present embodiment, the image data may be a content image.
The interface section 242 is a communication interface that communicates with other electronic devices 100 according to the ethernet standard. The interface 242 includes a connector and an interface circuit that processes signals transmitted by the connector. The interface part 242 is a main substrate including an interface substrate of a connector and an interface circuit and connected to the control part 250, the main substrate being a substrate on which the processor 253 and other components are mounted. The connector and interface circuit constituting the interface 242 are mounted on the main board of the control unit 250. The interface 242 may receive setting information or instruction information transmitted by other electronic devices 100.
The control section 250 includes a memory 251 and a processor 253.
The memory 251 is a storage device that nonvolatile stores programs and data executed by the processor 253. The Memory 251 is constituted by a semiconductor Memory element such as a magnetic Memory device or a flash-Only Memory (ROM) or other types of nonvolatile Memory devices. The memory 251 may also include random access memory (Random Access Memory, RAM) constituting a work area of the processor 253. The memory 251 stores data processed by the control section 250 and a control program executed by the processor 253.
The processor 253 may be constituted by a single processor or may be constituted by combining a plurality of processing groups. The processor 253 executes a control program to control various portions of the projection apparatus 200. For example, the processor 253 performs corresponding image processing in accordance with the operation signal generated by the operation section 231, and outputs parameters used in the image processing (such as parameters for performing trapezoidal correction on an image) to the image processing section 245. In addition, the processor 253 may control the light source on, off, or adjust the brightness in the light source part 211 by controlling the light source driving part 221.
The image processing section 245 and the frame memory 243 may be constituted by an integrated circuit. The integrated circuits include large scale integrated circuits (Large Scale Integration, LSI), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), programmable logic devices (Programmable Logic Device, PLD), which may include Field programmable gate arrays (Field-Programmable Gate Array, FPGA). The integrated circuit may also include a portion of an analog circuit, or a combination of a processor and an integrated circuit. The combination of the processor and the integrated circuit is called a micro control unit (Microcontroller Unit, MCU), a System on Chip (SoC), a System LSI, a chipset, or the like.
The image processing section 245 may store the image data received from the data interface 241 in the frame memory 243. The frame memory 243 includes a plurality of banks, each of which includes a storage capacity to which image data of one frame can be written. The frame memory 243 may be composed of synchronous dynamic random access memory (Synchronous Dynamic Random Access Memory, SDRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM).
The image processing section 245 may perform image processing on the image data stored in the frame memory 243, including resolution conversion, size adjustment, distortion correction, shape correction, digital zooming, image tone adjustment, image brightness adjustment, and the like.
The image processing section 245 may also convert an input frame frequency of the vertical synchronization signal into a drawing frequency and generate a vertical synchronization signal having the drawing frequency, the generated vertical synchronization signal being referred to as an output synchronization signal. The image processing unit 245 outputs the output synchronization signal to the optical modulator driving unit 222.
The foregoing description is only of the preferred embodiments of the present disclosure and description of the principles of the technology being employed. It will be appreciated by persons skilled in the art that the scope of the disclosure referred to in this disclosure is not limited to the specific combinations of features described above, but also covers other embodiments which may be formed by any combination of features described above or equivalents thereof without departing from the spirit of the disclosure. Such as those described above, are mutually substituted with the technical features having similar functions disclosed in the present disclosure (but not limited thereto).
Moreover, although operations are depicted in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order. In certain circumstances, multitasking and parallel processing may be advantageous. Likewise, while several specific implementation details are included in the above discussion, these should not be construed as limiting the scope of the present disclosure. Certain features that are described in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination. Although the subject matter has been described in language specific to method logic acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are example forms of implementing the claims. The specific manner in which the various modules perform the operations in the apparatus of the above embodiments have been described in detail in connection with the embodiments of the method, and will not be described in detail herein.
Claims (11)
1. A color temperature adjustment method, comprising:
determining target brightness information of a projection area, wherein the target brightness information is brightness information of the projection area when a projection device is in picture blanking time, and the picture blanking time is interval time of the projection device for projecting two adjacent frames of projection pictures;
and determining whether to execute the noninductive color temperature adjustment operation according to the target brightness information so as to adjust the color temperature of a projection picture projected by the projection equipment.
2. The method according to claim 1, wherein the method further comprises:
determining a second target color value according to the target brightness information and a first target color value stored in the projection device in advance under the condition that the non-sensing color temperature adjustment operation is determined to be executed, wherein the first target color value comprises color values corresponding to diffuse reflection light formed in the projection area by a pure red picture, a pure blue picture and a pure green picture projected by the projection device;
and executing the noninductive color temperature adjustment operation according to the second target color value and the target brightness information.
3. The method according to claim 1 or 2, wherein the determining whether to perform the noninductive color temperature adjustment operation according to the target luminance information includes:
And determining to execute the noninductive color temperature adjustment operation under the condition that the target brightness information meets the preset condition.
4. A method according to claim 3, wherein the preset condition includes that a difference between the currently determined target luminance information and the last determined target luminance information is not within a preset interval.
5. The method according to claim 1, wherein the method further comprises:
in the case where the size of the projection area and/or the projection screen is changed, it is determined to perform a perceived color temperature adjustment operation to adjust the color temperature of the projection screen projected by the projection apparatus.
6. The method of claim 5, wherein determining to perform a perceived color temperature adjustment operation in the event of a change in the size of the projection area and/or the projection screen comprises:
outputting a prompt option for prompting a user whether to execute a perceived color temperature adjustment operation or not under the condition that the size of the projection area and/or the projection picture is changed;
and in response to a selected operation of the prompt option, determining to execute a perceived color temperature adjustment operation.
7. The method according to claim 5, characterized in that the method comprises:
determining position change information of the projection device;
and determining that the size of the projection area and/or the projection picture changes under the condition that the position change information represents that the position of the projection equipment changes.
8. The method of any one of claims 5 to 7, wherein the perceived color temperature adjustment is operative to adjust the color temperature of the projected picture based on a first target color value comprising color values corresponding to diffuse light formed in a projection area for a pure red picture, a pure blue picture, and a pure green picture projected by the projection device and a third target color value comprising color values corresponding to diffuse light formed in the projection area for a pure black picture projected by the projection device.
9. A color temperature adjusting device, characterized by comprising:
the first determining module is configured to determine target brightness information of a projection area, wherein the target brightness information is brightness information of the projection area when the projection equipment is in picture blanking time, and the picture blanking time is interval time of two adjacent frames of projection pictures projected by the projection equipment;
And a second determining module configured to determine whether to perform a noninductive color temperature adjustment operation according to the target brightness information so as to adjust the color temperature of a projection picture projected by the projection device.
10. A computer storage medium on which a computer program is stored, characterized in that the program, when being executed by processing means, carries out the steps of the method according to any one of claims 1-8.
11. A projection device, comprising:
a storage device having a computer program stored thereon;
processing means for executing said computer program in said storage means to carry out the steps of the method according to any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311246470.1A CN117082221A (en) | 2023-09-25 | 2023-09-25 | Color temperature adjusting method, device, medium and projection equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311246470.1A CN117082221A (en) | 2023-09-25 | 2023-09-25 | Color temperature adjusting method, device, medium and projection equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117082221A true CN117082221A (en) | 2023-11-17 |
Family
ID=88704268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311246470.1A Pending CN117082221A (en) | 2023-09-25 | 2023-09-25 | Color temperature adjusting method, device, medium and projection equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117082221A (en) |
-
2023
- 2023-09-25 CN CN202311246470.1A patent/CN117082221A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20100302466A1 (en) | Projector and method for controlling the same | |
| US11323672B2 (en) | Control method for projector and projector | |
| JP2006319950A (en) | Image display device | |
| US20170272716A1 (en) | Projection apparatus, projection control method, and storage medium | |
| CN108737806B (en) | Projector color correction method and device and computer storage medium | |
| JP2008096805A (en) | Projector and projector system | |
| JP7155697B2 (en) | DISPLAY DEVICE AND CONTROL METHOD OF DISPLAY DEVICE | |
| JP2007053784A (en) | Projector type image display apparatus and flat body to be projected | |
| JP3901185B2 (en) | Projection apparatus, projection image capturing method, and program | |
| US10037734B2 (en) | Display apparatus and control method | |
| JP2012181264A (en) | Projection device, projection method, and program | |
| JP2016163228A (en) | Display device | |
| CN117082221A (en) | Color temperature adjusting method, device, medium and projection equipment | |
| JP6776619B2 (en) | Projection device, projection control method and program | |
| US9877003B2 (en) | Image projection apparatus, method of controlling image projection apparatus, and storage medium | |
| JP7266455B2 (en) | Display device, its control method, and program | |
| JP2009276610A (en) | Device and method for displaying image, and image-pickup device | |
| US20080111926A1 (en) | Projection system and adjusting method thereof | |
| US11838698B2 (en) | Display apparatus, its control method, and storage medium | |
| US9736387B2 (en) | Irradiation device, irradiation method, and program for switching irradiation regions | |
| JP2005055760A (en) | Projection display device and method for controlling the same | |
| JP2019168545A (en) | Projection controller, projector, projection control method, and program | |
| JP2011053397A (en) | Image display apparatus and image adjusting method | |
| JP2018074216A (en) | Electronic apparatus | |
| JP6996114B2 (en) | Projector and projector control 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 |