CN113963644A - Laser display device, image display method thereof and readable storage medium - Google Patents
Laser display device, image display method thereof and readable storage medium Download PDFInfo
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- CN113963644A CN113963644A CN202111268554.6A CN202111268554A CN113963644A CN 113963644 A CN113963644 A CN 113963644A CN 202111268554 A CN202111268554 A CN 202111268554A CN 113963644 A CN113963644 A CN 113963644A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/001—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background
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- G—PHYSICS
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0242—Compensation of deficiencies in the appearance of colours
Abstract
The invention discloses a laser display device, an image display method and a readable storage medium thereof, wherein image data of an image to be displayed is acquired when the image is displayed; adjusting the positions of pixels corresponding to the image data of the primary color light of at least one color to be loaded according to a preset rule; and loading image data according to the adjusted pixel positions to display images, so that the images of the primary colors are overlapped. The method comprises the steps that configuration is carried out in advance in a processor, after image data of an image to be displayed are obtained, pixel positions corresponding to the image data are automatically adjusted, an adjusting mechanism is solidified in a program of the processor in advance, the processor can start the program to adjust the pixel positions loaded with the image data according to the image data of primary light with color shift, and therefore when new pixel positions are adopted to load the image data, the image overlapping degree of the primary light with different colors can be higher, and the dispersion problem is improved.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a laser display device, an image display method thereof, and a readable storage medium.
Background
With the popularization of laser display products, the laser display products are beginning to be used as large screen products to replace televisions to reach thousands of households, and are used as display products to replace televisions. The laser display device utilizes the principle of laser projection, a laser light source emits tricolor light according to time sequence, and the emergent light of laser is incident to a projection lens after being modulated and is imaged by the projection lens. Due to the detention effect of the human eye, a color image can be finally seen.
The projection lens generally includes a plurality of lenses, and since the wavelengths of the tricolor lights are different, the refractive indexes of the lenses are also different, so that the tricolor lights entering the same position of the lenses have certain deviation in the imaging position after passing through the lenses, and the dispersion phenomenon is caused. In the beginning of application, the laser light source excites the fluorescent wheel by using monochromatic laser to generate other primary color light except laser (blue), the range of the fluorescent wavelength band is wider, the difference of the main peak values of different colors of pure three-color laser is larger or more obvious compared with the traditional laser light source for exciting the fluorescent type by using laser, and the difference of the refractive index is related to the wavelength (main peak value), so that the dispersion phenomenon is more obvious by using the pure three-color laser light source.
Disclosure of Invention
In a first aspect of embodiments of the present invention, an image display method for a laser display device is provided, in which image data of an image to be displayed is obtained when the image is displayed; adjusting the positions of pixels corresponding to the image data of the primary color light of at least one color to be loaded according to a preset rule; and loading image data according to the adjusted pixel positions to display the image. The method comprises the steps that configuration is carried out in advance in a processor, after image data of an image to be displayed are obtained, pixel positions corresponding to the image data are automatically adjusted, an adjusting mechanism is solidified in a program of the processor in advance, the processor can start the program to adjust the pixel positions loaded with the image data according to the image data of primary light with color shift, and therefore when new pixel positions are adopted to load the image data, the image overlapping degree of the primary light with different colors can be higher, and the dispersion problem is improved.
In a second aspect of the embodiments of the present invention, there is provided a laser display device including:
the laser light source is used for emitting laser of different colors according to time sequence;
the light valve modulation component is positioned on the light emitting side of the laser light source; the light valve modulation component is used for modulating and reflecting incident light;
the projection lens is positioned on a reflection light path of the light valve modulation component; the projection lens is used for imaging emergent light of the light valve modulation component;
a processor connected to the light valve modulating component; the processor is used for acquiring image data of an image to be displayed when the image is displayed, wherein the image data comprises image data of primary color light with different colors; adjusting the positions of pixels corresponding to the image data of the primary color light of at least one color to be loaded according to a preset rule; and loading image data according to the adjusted pixel positions to display the image.
The method comprises the steps that configuration is carried out in advance in a processor, after image data of an image to be displayed are obtained, pixel positions corresponding to the image data are automatically adjusted, an adjusting mechanism is solidified in a program of the processor in advance, the processor can start the program to adjust the pixel positions loaded with the image data according to the image data of primary light with color shift, and therefore when new pixel positions are adopted to load the image data, the image overlapping degree of the primary light with different colors can be higher, and the dispersion problem is improved.
In a third aspect of the embodiments of the present invention, a readable storage medium is provided, where executable instructions of a laser display device are stored, and the executable instructions of the laser display device are used to enable the laser display device to execute the image display method.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a laser display device according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating the operation of a light valve modulating component according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the principle of dispersion provided by an embodiment of the present invention;
FIG. 4 is a schematic diagram of a display effect according to an embodiment of the present invention;
fig. 5 is a flowchart of an image display method of a laser display device according to an embodiment of the present invention;
FIG. 6 is a second schematic diagram of the display effect provided by the embodiment of the invention;
fig. 7 is a third schematic view of the display effect provided by the embodiment of the invention.
The system comprises a laser light source 10, a light valve modulation component 20, a projection lens 30, a processor 40, a micro reflector 201 and an optical receiver 30'.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, the present invention is further described with reference to the accompanying drawings and examples. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted. The words expressing the position and direction described in the present invention are illustrated in the accompanying drawings, but may be changed as required and still be within the scope of the present invention. The drawings of the present invention are for illustrative purposes only and do not represent true scale.
With the popularization of laser display products, laser display devices have begun to be moved to thousands of households as large screen products to replace televisions. At present, the mainstream laser display device mainly comprises two display modes, one mode is to adopt a monochromatic laser to match with a color wheel for time-sharing display, and the other mode is to adopt a three-color laser to carry out three-primary-color display. Due to the visual inertia of human eyes, the primary colors alternately irradiated on the same pixel position at high speed are mixed and superposed to observe the color.
Fig. 1 is a schematic structural diagram of a laser display device according to an embodiment of the present invention.
As shown in fig. 1, the laser display device includes: a laser light source 10, a light valve modulation part 20 and a projection lens 30.
In the embodiment of the present invention, the laser light source 10 may adopt a monochromatic laser, a laser capable of emitting laser light of multiple colors, or a plurality of lasers emitting laser light of different colors. When the laser light source 10 adopts a monochromatic laser, the laser display device needs to be provided with a color wheel, the color wheel is used for color conversion, and the monochromatic laser can be matched with the color wheel to realize the purpose of emitting primary color light with different colors according to time sequence. When the laser light source 10 is a laser capable of emitting laser light of a plurality of colors, the laser light source needs to be controlled to emit laser light of different colors as primary color light in time series.
The light valve modulation unit 20 is located on the light emitting side of the laser light source 10, and the light valve modulation unit 20 is configured to modulate and reflect incident light. In an implementation, the light valve modulating component 20 may employ a Digital micro mirror Device (DMD), which is a reflective light valve Device, and the surface of the DMD includes thousands of micro mirrors.
Fig. 2 is a schematic diagram illustrating an operation principle of a light valve modulating component according to an embodiment of the present invention.
As shown in fig. 2, each of the tiny mirrors 201 in the DMD can deflect between ± 12 degrees, wherein the light of the reflective light source enters the projection lens 30 when the light is deflected to +12 degrees, and the light of the reflective light source is absorbed by the light absorber 30' without entering the projection lens when the light is deflected to-12 degrees. Each of the tiny mirrors 201 in the DMD can be individually driven to deflect, and incident light can be modulated by controlling the deflection angle and duration of each of the tiny mirrors 201 in the DMD. For one pixel, the longer the time period for which the minute mirror 201 is held at +12 degrees, the greater the luminance; the longer the duration of-12 degrees, the smaller the brightness.
The projection lens 30 is located on the reflection light path of the light valve modulating section 20, and the projection lens 30 is used to form an image of the light emitted from the light valve modulating section 20. The outgoing light modulated by the light valve modulation component 20 needs to be imaged through the projection lens 30 to project an image on a projection screen or a set position, and a viewer can view a display picture by viewing the projection screen.
The laser display device provided by the embodiment of the present invention further includes a processor 40, where the processor 40 is connected to the light valve modulation device 20 and is configured to provide a driving signal to the light valve modulation device 20, where the driving signal may specifically include information used to control the turning angle and duration of the micro mirrors in the light valve modulation device 20, and when the light valve modulation device 20 receives the driving signal sent by the processor 40, the micro mirrors may be driven by the driving signal in time.
Fig. 3 is a schematic diagram of the principle of dispersion according to an embodiment of the present invention.
As shown in fig. 3, the projection lens is used for imaging the light emitted from the light valve modulation device 20, and in general, the projection lens usually includes a plurality of lenses, and the whole of the projection lens can be understood as equivalent to a concave lens. Since the wavelengths of the tricolor lights are different, the refractive indexes of the tricolor lights are different in the lens, so that the tricolor lights entering the same position of the lens have certain deviation in the imaging position after passing through the lens. As shown in fig. 3, if the primary color light emitted from the laser light source 10 includes red light R, green light G and blue light B, when the red light R, the green light G and the blue light B are incident on the same position of the projection lens, the red light R ', the green light G ' and the blue light B ' emitted after passing through the projection lens are deviated, and the color deviation problem of the image projected on the screen is more obvious, which causes a dispersion phenomenon and affects the viewing experience of the user.
Fig. 4 is a schematic diagram of a display effect according to an embodiment of the present invention.
As shown in fig. 4, a color image displayed by the laser display device is formed by superimposing a red image, a green image, and a blue image, and the red image r, the green image g, and the blue image r cannot be completely superimposed due to the dispersion phenomenon. When the dispersion phenomenon is severe, the display effect will be affected.
The chromatic dispersion is caused by the projection lens, and therefore, the related art usually optimizes the projection lens, such as changing the curvature and coating of the lens, and changing the material of the lens, but these methods generally take a long time and significantly increase the cost.
In view of this, embodiments of the present invention provide an image display method of a laser display device, which can improve the dispersion phenomenon of a projection lens and optimize the display effect.
Fig. 5 is a flowchart of an image display method of a laser display device according to an embodiment of the present invention.
As shown in fig. 5, an image display method of a laser display device according to an embodiment of the present invention includes:
s10, acquiring image data of an image to be displayed when the image is displayed;
s20, adjusting the pixel positions corresponding to the image data of the primary light of at least one color to be loaded according to a preset rule;
s30, image data is loaded according to the adjusted pixel positions and image display is performed.
The laser display device utilizes a projection principle to display images, primary color light with different colors is required to be sequentially incident to the light valve modulation device aiming at a frame of image, the light valve modulation device is driven to modulate the primary color light with different colors according to the incident time sequence of the primary color light with different colors, and then the color image is observed by utilizing the retention effect of human eyes.
For example, the primary light emitted from the laser light source is typically red laser light, green laser light, and blue laser light. Then, when full-color image display is performed, the laser light source can emit red laser, green laser and blue laser in sequence; when the light valve modulator receives red laser, the red light is modulated, the modulated red light is reflected to the projection lens, and a red image is imaged by the projection lens; when the light valve modulator receives green laser, green light is modulated, the modulated green light is reflected to the projection lens, and a green image is imaged by the projection lens; when the light valve modulator receives blue laser, modulating the blue light, reflecting the modulated blue light to the projection lens, and imaging a blue image by the projection lens; since the switching frequency of the red image, the green image, and the blue image has exceeded the resolvable frequency of the human eye, the red image, the green image, and the blue image are superimposed in the human eye, and a full-color image is viewed.
Each pixel position on the projection screen corresponds to image data, and the image data comprises image data of primary colors of different colors. For example, when red light, green light, and blue light are used as the primary light, one pixel position corresponds to one red light image data, one green light image data, and one blue light image data at the same time, and the three primary light image data are superimposed at the same pixel position to form one color image point.
However, the primary lights of different colors have different refractive indexes in the projection lens, so that the three primary lights reflected from the same position of the light valve modulation device to the same position of the projection lens may generate color shift after passing through the projection lens. The position deviation among the red pixel point, the green pixel point and the blue pixel point of one pixel position is caused.
The image display method provided by the embodiment of the invention is directed to the above problem, the image display method is configured in advance in the processor, the pixel position corresponding to the image data is automatically adjusted after the image data of the image to be displayed is acquired, the adjusting mechanism is pre-cured in a program of the processor, and for the image data of the primary light generating color shift, the processor can start the program to adjust the pixel position loading the image data, so that when the image data is loaded by adopting a new pixel position, the image overlapping degree of the primary light of different colors can be higher, and the dispersion problem can be improved.
The description will be made by taking as an example that the primary color light is red light, green light, and blue light. For the red image data, the green image data and the blue image data originally loaded to the same pixel position, after the image display method provided by the embodiment of the invention is adopted to display the image, the pixel position loaded by the red image data, the pixel position loaded by the green image data and the pixel position loaded by the blue image data may be different, and just because of the adjustment, the position of the image finally imaged by the projection lens can generate certain offset, so that the overlapping degree of the images of all primary lights is higher, and the dispersion problem is improved.
In the embodiment of the present invention, the preset rule may be determined according to the following method:
firstly, projection display is carried out, and a projection image is obtained. The projected image is then divided into a plurality of regions. Since the display resolution of a laser display device is generally high and each pixel position corresponds to image data, the amount of calculation is enormous if the image data at each pixel position is adjusted. Therefore, the screen is divided into a plurality of areas, and the pixel positions corresponding to the image data in the same area are adjusted in the same trend, so that the offset direction and the offset of the adjusted pixel position corresponding to each image data in the same area relative to the pixel position before adjustment are the same. Therefore, the processing program of the processor can be simplified, and the processing efficiency can be improved.
The laser display device with a resolution of 3840 × 2160 can be divided into 32 × 62 areas, and the same adjustment can be performed for each pixel position in the same area. The division into screen areas should take into account the display resolution and the degree of dispersion produced by the projection lens. If the divided areas are too few, the dispersion phenomenon of the adjusted image is still obvious; if the divided area is too large, an increase in the amount of calculation is caused. Therefore, in specific implementation, the above factors need to be considered comprehensively, and an appropriate number of regions are divided, and the number of divided regions is not specifically limited in the embodiment of the present invention.
Then, determining the primary light of one color as reference light, and determining the primary light of at least one color except the reference light as adjusting light; determining the offset generated by the projection image of the adjusting light relative to the reference image by taking the projection image of the reference light as the reference image; and adjusting the positions of the pixels corresponding to the image data of the adjusting light to be loaded according to the offset.
Specifically, since the primary lights of different colors have different refractive indexes in the medium of the projection lens, when the refractive index is smaller, the degree of deflection thereof is smaller; when the refractive index is larger, the degree of deflection is larger, and the deviation is larger relative to the light ray with smaller refractive index. Therefore, in the embodiment of the present invention, the primary light of one color is selected as the reference light from the primary lights of different colors, and the primary lights of other colors are the lights to be adjusted, which is referred to as the adjustment light in the embodiment of the present invention. In concrete implementation, the primary light having a small refractive index may be used as the reference light. For example, when the primary color light is red light, green light, and blue light, the blue light may be used as the reference light, and the red light and/or the green light may be used as the adjustment light.
And acquiring each pixel position corresponding to the projection image of the primary color light of each color for each region. In the embodiment of the present invention, the projection image of the reference light is used as the reference image, and the projection image of the adjustment light is offset-adjusted toward the projection image of the reference light so that the projection images of the primary lights of all colors can be superimposed as much as possible. In specific implementation, it is necessary to determine an offset amount (which may be determined by a measurement chart) generated by the projection image of the adjustment light with respect to the projection image of the reference light without any adjustment, and then inversely adjust the pixel position corresponding to the image data of the adjustment light according to the offset amount.
Fig. 6 is a second schematic diagram of the display effect provided by the embodiment of the invention.
As shown in fig. 6, a coordinate system is established with the directions of the pixel rows and the pixel columns as coordinate axes, and pixel position coordinates may be defined according to the positions of the pixels in the pixel rows and the pixel columns. Taking the case shown in fig. 6 as an example, the upper left corner of the screen is taken as the origin (0,0), and the lower right position of the origin is the position where the image is located. If the display resolution of the laser display device is 3840 × 2160, the maximum pixel position coordinate is (3840,2160).
After the coordinate system is established, a line shift direction and a line shift amount of the projected image of the adjusted light generated in the direction of the pixel line with respect to the reference image, and a column shift direction and a column shift amount of the projected image of the adjusted light generated in the direction of the pixel column with respect to the reference image are respectively determined with the projected image of the reference light as the reference image. After determining the offset direction and the offset amount generated in the pixel row and pixel column directions, the pixel positions corresponding to the image data may be respectively adjusted in the pixel row and pixel column directions in reverse directions, so that the adjusted primary color light images of different colors have higher degree of overlap.
Still taking the case shown in fig. 6 as an example, the primary color light includes red light, green light, and blue light. For the display image in a certain area, the green light is imaged by the projection lens to generate a green image g which is shifted to the lower right relative to the blue image b; the red image r generated after the red light is imaged by the projection lens is shifted to the upper left relative to the blue image b, and the shift amount generated by the red image r is larger.
Because the same adjustment is carried out on each corresponding pixel position in the same region, the position of one pixel point can be selected in one region for calculation, and the positions of other pixels can be subjected to the same adjustment. As shown in fig. 6, the pixel position of the center point of the image in the region is selected for explanation. The green image center point (G) is not adjusted until the pixel position corresponding to the image data is adjustedx，Gy) With respect to the blue image center point (B) in the pixel row x directionx，By) Positive shift towards x-axis, producing a shift of σxGreen image center point (G)x，Gy) With respect to the blue image center point (B) in the pixel column y directionx，By) Positive shift towards y-axis, producing a shift of σy。
If the green image g and the blue image b after being imaged by the projection lens are overlapped, the green image needs to be reversely shifted by sigma along the x-axisxOffset in the opposite direction of the y-axis by σy. The embodiment of the invention can realize the image offset by changing the pixel position coordinate corresponding to the image data, so that the image offset is realizedThe positions of the green image and the blue image are overlapped; the red image r can be adjusted by adopting the same principle, so that the three primary color images are superposed, and the dispersion phenomenon is improved.
In some embodiments, the adjusted pixel position coordinates corresponding to the image data of the adjusted light may be determined using the following formula:
Tx-new＝Bx+σx；
Ty-new＝By+σy；
wherein (T)x-new，Ty-new) For adjusted pixel position coordinates, (B)x，By) As coordinates of pixel positions corresponding to reference light, σxAnd σyRespectively, the line offsets of the adjusting light relative to the reference light generated in the directions of the two coordinate axes.
After the adjusted pixel position coordinates corresponding to the image data are determined, loading the image data according to the adjusted pixel position can improve the degree of coincidence between the image of the adjusted light and the image of the reference light.
Note that σ in the embodiment of the present inventionxAnd σyIncludes both the magnitude and direction of the offset, so σxAnd σyAnd the signs are distinguished. Taking the case shown in FIG. 6 as an example, the center point (G) of the green imagex，Gy) Relative to the blue image center point (B)x，By) The positive deviation towards the x axis indicates that the projection lens can make the green image g deviate towards the positive direction of the x axis, so if the green image g imaged by the projection lens is overlapped with the blue image b, the pixel position loaded with the green image data needs to be adjusted towards the negative direction of the x axis, and at the moment, the sigma isxIs a negative value; similarly, green image center point (G)x，Gy) Relative to the blue image center point (B)x，By) The positive shift to the y axis indicates that the projection lens can shift the green image g to the positive direction of the y axis, so if the green image g imaged by the projection lens is overlapped with the blue image b, the pixel position loaded with the green image data needs to be shifted to the negative direction of the y axisAdjustment is made, at this time σyIs negative. And for the red image r, its corresponding σxAnd σyShould be positive.
In one embodiment, the reference light may be blue light, and the modulated light may be red light and green light. And after the blue image b is used as a reference image and the pixel positions corresponding to the image data of the green image g and the pixel positions corresponding to the image data of the red image r are determined according to the formula, the red image data and the green image data are loaded by adopting the adjusted pixel positions, so that the superposition degree of the imaging positions of the red image r, the green image g and the blue image b is higher, and the dispersion phenomenon is improved.
In some embodiments, the adjusted pixel position coordinates corresponding to the image data of the adjusted light may be determined using the following formula:
T'x-new＝Tx-new+σx-new；
T'y-new＝Ty-new+σy-new；
wherein:
(T’x-new，T’y-new) For adjusted pixel position coordinates, (T)x，Ty) To coordinate the pixel position before adjustment, (T)x-1，Ty-1) And (T)x+1，Ty+1) Are respectively (T)x，Ty) Pixel position coordinates on both sides; sigmaxAnd σyAre respectively at (T)x，Ty) A line offset generated in the directions of two coordinate axes of the position adjusting light relative to the reference light; sigmax-1And σy-1Are respectively at (T)x-1，Ty-1) A line offset generated in the directions of two coordinate axes of the position adjusting light relative to the reference light; sigmax+1And σy+1Are respectively at (T)x+1，Ty+1) The position adjusting light is offset from the reference light in the direction of two coordinate axes.
The method is adopted to firstly accumulate the position coordinates of three adjacent pixels and then take the average value to obtain a new position coordinate (T)x-new，Ty-new) (ii) a Then, the offset generated by the position coordinates of three adjacent pixels relative to the reference image is accumulated and then averaged to obtain a new offset (sigma)x-new，σy-enw) (ii) a And finally, determining the pixel position coordinate (T ') after final adjustment according to the formula'x-new，T’y-new)。
The adoption of the formula to determine the pixel position coordinates can optimize the continuity and smoothness of the coordinate points, improve the softness and comfort of the picture and also well improve the final dispersion effect.
The embodiment of the invention compares the image display effect of the image display by adopting the rule with the image display effect in the related technology: at present, the offset of red light on a screen after being refracted by a projection lens relative to blue light can reach-0.8 pixel at most, and the offset of green light relative to blue light can reach 0.8 pixel at most. After the adjustment is performed by adopting the above-mentioned rule provided by the embodiment of the present invention, the amount of shift generated by the red light with respect to the blue light and the green light with respect to the blue light is only 0.2 pixels at the maximum, the dispersion phenomenon is significantly improved, and the display effect is as shown in fig. 7, which meets the actual use requirement.
It is noted that for pixels at edge locations, the pixel location coordinates cannot exceed the boundary. Still taking the laser display device with resolution of 3840 × 2160 as an example, the coordinates of the displayed image near the origin position need to be larger than (0,0), the coordinates near the boundary position cannot be larger than 3840 along the x-axis, and cannot be larger than 2160 along the y-axis.
In addition, due to the influence of the resolution and optical characteristics of the projection lens, basic knowledge of the hardware used is required before the pixel position corresponding to the image data is adjusted by the above-described image display method. In the embodiment of the present invention, the row offset σ isxAnd column offset σyThe size of each needs to be larger than the resolution of the projection lens because adjustments smaller than the resolution of the projection lens are ineffective after imaging. For example, if the projection lens can only resolve one pixel at the maximum, the offset σ is generatedxAnd σyWhen the color values are all less than 1, the position of the adjusted tricolor light after passing through the projection lens can not be changed.
In practical applications, the set position may be selected as a reference position, and the red image, the green image, and the blue image may be adjusted to the reference position. At this time, it is no longer necessary to select a primary color light of one color as the reference light, and the specific adjustment method may refer to the above embodiments, which are not described herein.
In specific implementation, when the pixel position corresponding to the image data of the primary color light of at least one color is adjusted, the image to be displayed can be divided into a plurality of areas; these regions are the same as the regions divided when the above-mentioned preset rule is determined, so that there is a corresponding adjustment scheme for each region. And aiming at each region, adjusting each pixel position corresponding to the image data of the primary light of at least one color to be loaded according to a preset rule. Therefore, the calculation amount can be greatly reduced, and the projection image adjustment efficiency can be improved.
Another aspect of the embodiments of the present invention provides a laser display device, and the structure of the laser display device may be as shown in fig. 1, and specifically includes: a laser light source 10, a light valve modulation component 20, a projection lens 30 and a processor 50.
The laser light source 10 emits laser light of different colors at a set timing. The light valve modulation unit 20 is located on the light emitting side of the laser light source 10, and the light valve modulation unit 20 is configured to modulate and reflect incident light. In the embodiment of the present invention, the light valve modulating unit 20 may employ a DMD. The projection lens 30 is located on the reflection light path of the light valve modulation section 20, and the projection lens 30 is used to form an image of the outgoing light from the light valve modulation section. The processor 40 is connected with the light valve modulating section 20; the processor 40 is configured to obtain image data of an image to be displayed when performing image display; adjusting the positions of pixels corresponding to the image data of the primary color light of at least one color to be loaded according to a preset rule; and loading image data according to the adjusted pixel positions to display the image.
The embodiment of the invention is configured in the processor in advance, the pixel position corresponding to the image data is automatically adjusted after the image data of the image to be displayed is acquired, the adjusting mechanism is solidified in the program of the processor in advance, and the processor can start the program to adjust the pixel position for loading the image data for the image data of the primary color light generating color shift, so that when the image data is loaded at a new pixel position, the image overlapping degree of the primary color light with different colors can be higher, and the dispersion problem is improved.
Specifically, the processor 40 is specifically configured to divide the image to be displayed into a plurality of regions; and aiming at each region, adjusting each pixel position corresponding to the image data of the primary light of at least one color to be loaded according to a preset rule.
In the same region, the offset direction and the offset of the adjusted pixel position corresponding to each image data relative to the pixel position before adjustment are the same.
Further, the processor 40 is configured to acquire a projection image of the laser display device, and divide the projection image into a plurality of regions; determining primary light of one color as reference light, and determining primary light of at least one color other than the reference light as adjusted light; acquiring each pixel position corresponding to the projection image of the primary color light of each color for each region; determining the offset generated by the projection image of the adjusting light relative to the reference image by taking the projection image of the reference light as the reference image; and determining each pixel position corresponding to the image data of the adjusting light to be loaded according to the offset.
For example, the primary light includes red light, green light, and blue light. In a specific implementation, blue light may be determined as the reference light and red and green light may be determined as the adjusted light.
Specifically, the processor 40 may establish a coordinate system having the directions of the pixel rows and the pixel columns as coordinate axes; a line shift direction and a line shift amount generated by the projection image of the adjustment light in the direction of the pixel line with respect to the reference image are determined, and a column shift direction and a column shift amount generated by the projection image of the adjustment light in the direction of the pixel column with respect to the reference image are determined, respectively, with the projection image of the reference light as the reference image.
The processor 40 may specifically determine the adjusted pixel position coordinates corresponding to the image data of the adjusted light using the following formula:
Tx-new＝Bx+σx；
Ty-new＝By+σy；
wherein (T)x-new，Ty-new) For adjusted pixel position coordinates, (B)x，By) As coordinates of pixel positions corresponding to reference light, σxAnd σyRespectively, the line offsets of the adjusting light relative to the reference light generated in the directions of the two coordinate axes.
Alternatively, the processor 40 may specifically determine the adjusted pixel position coordinates corresponding to the image data of the adjusted light by using the following formula:
T'x-new＝Tx-new+σx-new；
T'y-new＝Ty-new+σy-new；
wherein:
(T’x-new，T’y-new) For adjusted pixel position coordinates, (T)x，Ty) To coordinate the pixel position before adjustment, (T)x-1，Ty-1) And (T)x+1，Ty+1) Are respectively (T)x，Ty) Pixel position coordinates on both sides; sigmaxAnd σyAre respectively at (T)x，Ty) A line offset generated in the directions of two coordinate axes of the position adjusting light relative to the reference light; sigmax-1And σy-1Are respectively at (T)x-1，Ty-1) A line offset generated in the directions of two coordinate axes of the position adjusting light relative to the reference light; sigmax+1And σy+1Are respectively at (T)x+1，Ty+1) The position adjusting light is offset from the reference light in the direction of two coordinate axes.
The embodiment of the invention also provides a readable storage medium, wherein the readable storage medium stores an executable instruction of the laser display device, and the executable instruction of the laser display device is used for enabling the laser display device to execute any image display method.
According to a first inventive concept, a laser display apparatus image display method includes: when image display is carried out, image data of an image to be displayed are obtained; adjusting the positions of pixels corresponding to the image data of the primary color light of at least one color to be loaded according to a preset rule; and loading image data according to the adjusted pixel positions to display the image. The method comprises the steps that configuration is carried out in advance in a processor, after image data of an image to be displayed are obtained, pixel positions corresponding to the image data are automatically adjusted, an adjusting mechanism is solidified in a program of the processor in advance, the processor can start the program to adjust the pixel positions loaded with the image data according to the image data of primary light with color shift, and therefore when new pixel positions are adopted to load the image data, the image overlapping degree of the primary light with different colors can be higher, and the dispersion problem is improved.
According to the second inventive concept, when adjusting the pixel position corresponding to the image data of the primary color light of at least one color, the image to be displayed may be first divided into a plurality of regions; and aiming at each region, adjusting each pixel position corresponding to the image data of the primary light of at least one color to be loaded according to a preset rule. The laser display device has a high display resolution, and each pixel position corresponds to image data, so that if the image data at each pixel position is adjusted, the calculation amount is huge. Therefore, the screen is divided into a plurality of areas, and the pixel positions corresponding to the image data in the same area are adjusted in the same trend, so that the offset direction and the offset of the adjusted pixel position corresponding to each image data in the same area relative to the pixel position before adjustment are the same. Therefore, the processing program of the processor can be simplified, and the processing efficiency can be improved.
According to a third inventive concept, the rules preset in the processor are determined according to the following method: acquiring a projection image of a laser display device, and dividing the projection image into a plurality of areas; determining primary light of one color as reference light, and determining primary light of at least one color other than the reference light as adjusted light; acquiring each pixel position corresponding to the projection image of the primary color light of each color for each region; determining the offset generated by the image of the adjusting light relative to the reference image by taking the image of the reference light as the reference image; and determining each pixel position corresponding to the image data of the adjusting light to be loaded according to the offset. The offset generated by the image of the adjusting light relative to the image of the reference light when no adjustment is made is determined, and then the pixel position corresponding to the image data of the adjusting light is reversely adjusted according to the offset.
According to the fourth aspect of the present invention, the primary light having a small refractive index may be used as the reference light, and the other primary light having a relatively large refractive index may be used as the adjustment light.
According to the fifth inventive concept, a coordinate system is established with the directions of the pixel rows and the pixel columns as coordinate axes, and the row shift direction and the row shift amount generated by the projected image of the adjustment light in the direction of the pixel rows with respect to the reference image, and the column shift direction and the column shift amount generated by the projected image of the adjustment light in the direction of the pixel columns with respect to the reference image are respectively determined with the projected image of the reference light as the reference image. After determining the offset direction and the offset amount generated in the pixel row and pixel column directions, the pixel positions corresponding to the image data may be respectively adjusted in the pixel row and pixel column directions in reverse directions, so that the adjusted primary color light images of different colors have higher degree of overlap.
According to a sixth inventive concept, adjusted pixel position coordinates corresponding to image data of the adjusted light are determined using the following formula:
Tx-new＝Bx+σx；
Ty-new＝By+σy；
wherein (T)x-new，Ty-new) For adjusted pixel position coordinates, (B)x，By) As coordinates of pixel positions corresponding to reference light, σxAnd σyRespectively, the line offsets of the adjusting light relative to the reference light generated in the directions of the two coordinate axes.
After the adjusted pixel position coordinates corresponding to the image data are determined, loading the image data according to the adjusted pixel position can improve the degree of coincidence between the image of the adjusted light and the image of the reference light.
According to the seventh inventive concept, the adjusted pixel position coordinates corresponding to the image data of the adjusted light are determined using the following formula:
T'x-new＝Tx-new+σx-new；
T'y-new＝Ty-new+σy-new；
wherein:
(T’x-new，T’y-new) For adjusted pixel position coordinates, (T)x，Ty) To coordinate the pixel position before adjustment, (T)x-1，Ty-1) And (T)x+1，Ty+1) Are respectively (T)x，Ty) Pixel position coordinates on both sides; sigmaxAnd σyAre respectively at (T)x，Ty) A line offset generated in the directions of two coordinate axes of the position adjusting light relative to the reference light; sigmax-1And σy-1Are respectively at (T)x-1，Ty-1) A line offset generated in the directions of two coordinate axes of the position adjusting light relative to the reference light; sigmax+1And σy+1Are respectively at (T)x+1，Ty+1) The position adjusting light is offset from the reference light in the direction of two coordinate axes.
The adoption of the formula to determine the pixel position coordinates can optimize the continuity and smoothness of the coordinate points, improve the softness and comfort of the picture and also well improve the final dispersion effect.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. An image display method of a laser display device, comprising:
when image display is carried out, image data of an image to be displayed are obtained, wherein the image data comprise image data of primary color light with different colors;
adjusting the positions of pixels corresponding to the image data of the primary color light of at least one color to be loaded according to a preset rule;
and loading the image data according to the adjusted pixel positions to display the image.
2. The method according to claim 1, wherein the predetermined rule for adjusting the pixel position corresponding to the image data of the primary color light is determined by:
acquiring a projection image of the laser display device, and dividing the projection image into a plurality of areas;
determining primary light of one color as reference light, and determining primary light of at least one color other than the reference light as adjusted light;
acquiring each pixel position corresponding to the projection image of the primary color light of each color for each region;
determining the offset generated by the projection image of the adjusting light relative to the reference image by taking the projection image of the reference light as the reference image;
and determining each pixel position corresponding to the image data of the adjusting light to be loaded according to the offset.
3. The method of claim 2, wherein determining the amount of shift produced by the projected image of the adjusted light relative to the reference image using the projected image of the reference light as the reference image comprises:
establishing a coordinate system taking the directions of the pixel rows and the pixel columns as coordinate axes;
determining a line shift direction and a line shift amount generated by the projection image of the adjusted light relative to the reference image along a direction of a pixel line with respect to the projection image of the reference light as a reference image;
and determining a column shift direction and a column shift amount generated by the projection image of the adjusted light along a pixel column direction with respect to the reference image, with the projection image of the reference light as a reference image.
4. The method of claim 3, wherein the adjusted pixel position coordinates corresponding to the image data of the adjusted light are determined using the following formula:
Tx-new＝Bx+σx；
Ty-new＝By+σy；
wherein (T)x-new，Ty-new) For adjusted pixel position coordinates, (B)x，By) For the pixel position coordinates, σ, corresponding to said reference lightxAnd σyThe line offsets of the adjustment light relative to the reference light along the directions of the two coordinate axes are respectively generated.
5. The method of claim 3, wherein the adjusted pixel position coordinates corresponding to the image data of the adjusted light are determined using the following formula:
T'x-new＝Tx-new+σx-new；
T'y-new＝Ty-new+σy-new；
wherein:
(T’x-new，T’y-new) For adjusted pixel position coordinates, (T)x，Ty) To coordinate the pixel position before adjustment, (T)x-1，Ty-1) And (T)x+1，Ty+1) Are respectively (T)x，Ty) Pixel position coordinates on both sides; sigmaxAnd σyAre respectively at (T)x，Ty) Positioning a line offset generated in directions of two coordinate axes of the adjusting light relative to the reference light; sigmax-1And σy-1Are respectively at (T)x-1，Ty-1) Positioning a line offset generated in directions of two coordinate axes of the adjusting light relative to the reference light; sigmax+1And σy+1Are respectively at (T)x+1，Ty+1) And the line offset generated by the adjusting light relative to the reference light along the directions of two coordinate axes is positioned.
6. The method of any of claims 2-5, wherein the row offset and the column offset are greater than a projection lens resolution.
7. The method of any of claims 2-5, wherein the different colors of primary light comprise red, green, and blue light;
the determining primary color light of one color as reference light and primary color light of at least one color other than the reference light as adjusted light includes:
the blue light is determined as reference light and the red light and the green light are determined as adjusted light.
8. The method according to any one of claims 2 to 5, wherein the adjusting, according to a preset rule, each pixel position corresponding to the image data of the primary color light of at least one color to be loaded comprises:
dividing image data of an image to be displayed into a plurality of areas;
aiming at each region, adjusting each pixel position corresponding to the image data of the primary light of at least one color to be loaded according to a preset rule;
in the same region, the offset direction and the offset of the adjusted pixel position corresponding to each image data relative to the pixel position before adjustment are the same.
9. A laser display device, comprising:
the laser light source is used for emitting laser of different colors according to time sequence;
the light valve modulation component is positioned on the light emitting side of the laser light source; the light valve modulation component is used for modulating and reflecting incident light;
the projection lens is positioned on a reflection light path of the light valve modulation component; the projection lens is used for imaging emergent light of the light valve modulation component;
a processor connected to the light valve modulating component; the processor is used for acquiring image data of an image to be displayed when the image is displayed, wherein the image data comprises image data of primary color light with different colors; adjusting the positions of pixels corresponding to the image data of the primary color light of at least one color to be loaded according to a preset rule; and loading the image data according to the adjusted pixel positions to display the image.
10. A readable storage medium storing executable instructions of a laser display device, the executable instructions of the laser display device being configured to cause the laser display device to perform the image display method according to any one of claims 1 to 8.
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