CN115706787A - Laser projection equipment and data transmission method - Google Patents
Laser projection equipment and data transmission method Download PDFInfo
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- CN115706787A CN115706787A CN202110915610.4A CN202110915610A CN115706787A CN 115706787 A CN115706787 A CN 115706787A CN 202110915610 A CN202110915610 A CN 202110915610A CN 115706787 A CN115706787 A CN 115706787A
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Abstract
The application discloses laser projection equipment and a data transmission method, and belongs to the field of projection display. The system-on-chip can transmit the image data of at least two frames of sub-images at a time, and the image data of the at least two frames of sub-images comprises the primary color values of a plurality of primary colors of each pixel in one frame of sub-image and the primary color values of other primary colors except the target primary color of each pixel in other frame of sub-images. Therefore, the display control chip can display one frame of sub-image based on the primary color values of the multiple primary colors of each pixel in one frame of sub-image in at least two frames of sub-images, and display other frames of sub-images based on the primary color values of the other primary colors of each pixel in other frames of sub-images and the primary color value of the target primary color of each pixel in one frame of sub-image. The primary color value of the target primary color of each pixel in other frame sub-images does not need to be transmitted, so that the effect of transmitting the image data of at least two frame sub-images to the display control chip at one time is realized, and the data transmission efficiency is improved.
Description
Technical Field
The present disclosure relates to the field of projection display, and in particular, to a laser projection apparatus and a data transmission method.
Background
The resolution of a laser projection device is determined by the number of micro-mirrors that the light valve of the device contains, each micro-mirror being capable of projecting one pixel of the projected image. Since the number of the micro lenses that can be set in the laser projection device is limited, in the process of displaying the projection image, the resolution of the laser projection device may be smaller than the resolution of the projection image that needs to be displayed.
In the related art, the laser projection device may include a system on chip and a display control chip, and the system on chip and the display control chip are connected through a plurality of data interfaces. In the process of displaying the projection image, if the system-on-chip determines that the resolution of the laser projection device is smaller than the resolution of the projection image, the system-on-chip may divide the projection image into multiple frames of sub-images and sequentially transmit image data of the multiple frames of sub-images to the display control chip through the data interface. After receiving the image data of each frame of the sub-image, the display control chip may display the sub-image based on the image data of the sub-image.
However, since the number of data interfaces provided between the system-on-chip and the display control chip is limited, the system-on-chip can only transmit image data of one frame of sub-image to the display control chip at a time, resulting in low efficiency of data transmission.
Disclosure of Invention
The embodiment of the disclosure provides a laser projection device and a data transmission method, which can solve the problems. The technical scheme is as follows:
in one aspect, a laser projection device is provided, where the laser projection device includes a system-on-chip and a display control chip, and a first data interface with a target number of the system-on-chip is connected to a second data interface with the target number of the display control chip;
the system-on-chip is used for:
segmenting a projected image to obtain a plurality of frames of sub-images, wherein the resolution of the projected image is greater than that of a light valve, and the resolution of each frame of sub-image is not greater than that of the light valve;
based on the display sequence of the multi-frame sub-images, sequentially transmitting the image data of the multi-frame sub-images to the display control chip through the target number of first data interfaces, wherein the image data of at least two frames of sub-images are transmitted to the display control chip each time, and the image data of the at least two frames of sub-images comprise basic color values of a plurality of basic colors of each pixel in one frame of sub-image and basic color values of other basic colors of each pixel in other frame sub-images except for the target basic color;
the display control chip is used for: for each received image data of at least two frame sub-images, displaying the frame sub-image based on the primary color values of the plurality of primary colors of each pixel in the frame sub-image in the at least two frame sub-images, and displaying the other frame sub-images based on the primary color values of the other primary colors of each pixel in the other frame sub-images and the primary color value of the target primary color of each pixel in the frame sub-image.
Optionally, the system on chip is further configured to:
for each primary color, determining the ratio of the primary color to a plurality of primary colors in the projected image;
and determining the primary color with the ratio outside the ratio range as the target primary color.
Optionally, the ratio S of the jth primary color of the plurality of primary colors j Satisfies the following conditions:
wherein M is the total number of the plurality of pixels in the projection image, and H ij The primary color value of the jth primary color of the ith pixel in the plurality of pixels in the projected image, n is the number of bits occupied by the primary color value of each primary color, and Z is the sum of the primary color values of the plurality of primary colors of the plurality of pixels in the projected image.
Optionally, the system on chip is further configured to:
if the occupation ratios of the multiple primary colors in the projected image are all located in the occupation ratio range, determining the ratio of the sum of the primary color values of the primary colors of the target pixel in the projected image to the sum of the primary color values of the multiple pixels for each primary color, wherein the primary color value of the primary color of the target pixel is greater than or equal to a primary color value threshold value;
and determining the primary color of which the ratio is less than or equal to a ratio threshold value as the target primary color.
Optionally, the base color value threshold k satisfies: k = w × y; the w is a maximum value of base color values of pixels in the projection image, and the y is a target percentage.
Optionally, the system on chip is further configured to:
and if a primary color with the color of blue exists in the projected image, determining the blue color as the target primary color.
In another aspect, a data transmission method is provided, and the method includes:
dividing a projected image to obtain a plurality of frames of sub-images, wherein the resolution of the projected image is greater than that of a light valve, and the resolution of each frame of sub-image is not greater than that of the light valve;
based on the display sequence of the multiple frames of sub-images, sequentially transmitting the image data of the multiple frames of sub-images to the display control chip through the first data interfaces with the target number;
the display control chip is used for transmitting image data of at least two frames of sub-images to the display control chip at each time, and the image data of the at least two frames of sub-images comprises basic color values of a plurality of basic colors of each pixel in one frame of sub-image and basic color values of other basic colors except for a target basic color of each pixel in other frame of sub-images; the image data of the at least two frame sub-images transmitted to the display control chip each time is used for instructing the display control chip to display the frame sub-image based on the primary color values of the multiple primary colors of each pixel in the frame sub-image in the at least two frame sub-images, and to display the other frame sub-images based on the primary color values of the other primary colors of each pixel in the other frame sub-images and the primary color value of the target primary color of each pixel in the frame sub-image.
Optionally, the method further includes:
for each primary color, determining the ratio of the primary color to a plurality of primary colors in the projected image;
and determining the primary color with the proportion outside the proportion range as the target primary color.
Optionally, the method further includes:
and if a primary color with the color of blue exists in the projected image, determining the blue color as the target primary color.
In another aspect, a data transmission method is provided, where the method includes:
receiving the image data of multiple frame sub-images in sequence through the target number of second data interfaces, wherein the image data of at least two frame sub-images are received each time, and the image data of the at least two frame sub-images comprise basic color values of multiple basic colors of each pixel in one frame sub-image and basic color values of other basic colors of each pixel in other frame sub-images except the target basic color;
for each received image data of the at least two frame sub-images, displaying the frame sub-image based on the primary color values of the plurality of primary colors of each pixel in the frame sub-image of the at least two frame sub-images, and displaying the other frame sub-images based on the primary color values of the other primary colors of each pixel in the other frame sub-images and the primary color value of the target primary color of each pixel in the frame sub-image.
In yet another aspect, a computer-readable storage medium is provided, in which instructions are stored, the instructions being loaded and executed by a processor to implement the method for correcting a projected image according to the above aspect.
In a further aspect, there is provided a computer program product containing instructions which, when run on a computer, cause the computer to perform the method of correcting a projected image of the above aspect.
In yet another aspect, there is provided a laser projection apparatus comprising a processor and a memory having instructions stored therein, the instructions being loaded and executed by the processor to implement the method of correcting a projected image as described in the above aspect.
The beneficial effects brought by the technical scheme provided by the embodiment of the disclosure at least comprise:
the embodiment of the disclosure provides a laser projection device and a data transmission method, wherein in the process of sequentially transmitting a plurality of frames of sub-images to a display control chip by a system level chip, image data of at least two frames of sub-images can be transmitted each time, and the image data of the at least two frames of sub-images comprises basic color values of a plurality of basic colors of each pixel in one frame of sub-image and basic color values of other basic colors except for a target basic color of each pixel in other frame of sub-images. Therefore, the display control chip can display one frame of sub-image based on the primary color values of the multiple primary colors of each pixel in one frame of sub-image in the at least two frame of sub-images, and display other frame of sub-images based on the primary color values of the other primary colors of each pixel in the other frame of sub-images and the primary color value of the target primary color of each pixel in the one frame of sub-image. The primary color value of the target primary color of each pixel in other frame sub-images does not need to be transmitted, so that the effect of transmitting the image data of at least two frame sub-images to the display control chip at one time is realized, and the data transmission efficiency is further improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a laser projection apparatus provided in an embodiment of the present disclosure;
fig. 2 is a flowchart of a data transmission method provided by an embodiment of the present disclosure;
fig. 3 is a flowchart of another data transmission method provided by the embodiments of the present disclosure;
fig. 4 is a flowchart of another data transmission method provided by the embodiment of the present disclosure;
fig. 5 is a schematic diagram of a 4-frame sub-image provided by the embodiment of the present disclosure;
fig. 6 is a schematic diagram of another 4-frame sub-image provided by the embodiment of the present disclosure.
Detailed Description
To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a laser projection apparatus provided in an embodiment of the present disclosure, and as shown in fig. 1, the laser projection apparatus includes a System On Chip (SOC) 10 and a display control chip 20.
The system-on-chip 10 has a target number of first data interfaces, the display control chip 20 has a target number of second data interfaces, and the target number of first data interfaces on the system-on-chip 10 is connected to the target number of second data interfaces on the display control chip 20 in a one-to-one correspondence manner. The system-on-chip 10 can transmit the image data to the display control chip 20 through the target number of first data interfaces, and accordingly, the display control chip 20 can receive the image data transmitted by the system-on-chip 10 through the target number of second data interfaces. The display control chip 20 may be a Digital Light Processing (DLP) chip. Illustratively, the target number may be 5.
In the related art, during the process of transmitting each frame of sub-image to the display control chip 20, the system on chip 10 needs to transmit the sub-image through 3 first data interfaces. The primary color value of the red primary color in the sub-image is transmitted to the display control chip 20 through a first data interface, the primary color value of the green primary color in the sub-image is transmitted to the display control chip 20 through a first data interface, and the primary color value of the green primary color in the sub-image is transmitted to the display control chip 20 through a first data interface.
If the target number is 5, since the system-on-chip 10 needs to adopt 3 first data interfaces to transmit a frame of sub-image to the display control chip 20, the system-on-chip 10 can only transmit data of a frame of sub-image to the display control chip 10 at a time, which results in low efficiency of data transmission.
Fig. 2 is a flowchart of a data transmission method provided by an embodiment of the present disclosure, where the data transmission method may be applied to the system on chip 10 shown in fig. 1, and as shown in fig. 2, the method includes:
In the process of projecting the projection image onto the projection screen, after the system-on-chip 10 acquires the projection image, if it is determined that the resolution of the projection image is greater than that of the light valve, the projection image may be segmented to obtain multiple frames of sub-images. The resolution of the projected image is greater than that of the light valve, and the resolution of each frame of sub-image is not greater than that of the light valve.
After the system-on-chip 10 divides the projection image into multiple frames of sub-images, the image data of the multiple frames of sub-images may be sequentially transmitted to the display control chip 20 through the first data interfaces of the target number based on the display sequence of the multiple frames of sub-images. The system-on-chip can determine the display sequence of the multiple frames of sub-images according to the arrangement positions of the multiple frames of sub-images in the projection image.
In the embodiment of the present disclosure, the system-on-chip 10 transmits the image data of at least two frame sub-images to the display control chip 20 at a time, and the image data of the at least two frame sub-images may include the primary color values of a plurality of primary colors of each pixel in one frame sub-image, and the primary color values of other primary colors than the target primary color of each pixel in other frame sub-images. The image data of the at least two frame sub-images transmitted to the display control chip 20 at a time is used to instruct the display control chip 20 to display one frame sub-image based on the primary color values of the multiple primary colors of each pixel in the one frame sub-image, and to display the other frame sub-images based on the primary color values of the other primary colors of each pixel in the other frame sub-images and the primary color value of the target primary color of each pixel in the one frame sub-image.
The plurality of primary colors of each pixel may include a red primary color, a blue primary color, and a green primary color, and the primary color values of the plurality of primary colors of each pixel may include a red primary color value, a blue primary color value, and a green primary color value of the pixel.
In summary, the embodiment of the present disclosure provides a data transmission method, in a process that a system-on-chip sequentially transmits multiple frames of sub-images to a display control chip, image data of at least two frames of sub-images can be transmitted each time, and the image data of the at least two frames of sub-images includes base color values of multiple base colors of each pixel in one frame of sub-image and base color values of other base colors of each pixel in other frames of sub-images except for a target base color. Therefore, the display control chip can display one frame of sub-image based on the primary color values of the multiple primary colors of each pixel in one frame of sub-image in the at least two frames of sub-images, and display other frames of sub-images based on the primary color values of the other primary colors of each pixel in other frames of sub-images and the primary color value of the target primary color of each pixel in the one frame of sub-image. The primary color value of the target primary color of each pixel in other frame sub-images does not need to be transmitted, so that the effect of transmitting the image data of at least two frame sub-images to the display control chip at one time is realized, and the data transmission efficiency is further improved.
Fig. 3 is a flowchart of another data transmission method provided in the embodiment of the present disclosure, where the data transmission method may be applied to the display control chip 20 shown in fig. 1, and as shown in fig. 3, the method includes:
and 301, sequentially receiving the image data of the multiple frames of sub-images through the second data interfaces with the target number.
The display control chip 20 may sequentially receive the image data of the multiple frames of sub-images sent by the system-on-chip 10 through the second data interfaces of the target number. The display control chip 20 may receive the image data of at least two frame sub-images at a time, and the image data of the at least two frame sub-images may include base color values of a plurality of base colors of each pixel in one frame sub-image, and base color values of other base colors of each pixel in the other frame sub-images except for the target base color.
For the image data of at least two frames of sub-images received each time, after receiving the image data of the at least two frames of sub-images, the display control chip 20 may display one frame of sub-image based on the primary color values of the multiple primary colors of each pixel in one frame of sub-image in the at least two frames of sub-images, and may display other frames of sub-images based on the primary color values of the other primary colors of each pixel in the other frames of sub-images and the primary color value of the target primary color of each pixel in one frame of sub-images.
To sum up, the embodiment of the present disclosure provides a data transmission method, in a process of receiving image data of multiple frame sub-images sent by a system on chip, a display control chip may receive image data of at least two frame sub-images each time, display one frame sub-image based on primary color values of multiple primary colors of each pixel in one frame sub-image in the at least two frame sub-images, and display other frame sub-images based on primary color values of other primary colors of each pixel in other frame sub-images and primary color values of target primary colors of each pixel in the one frame sub-image, thereby implementing display of the two frame sub-images. The system-level chip does not need to transmit the primary color value of the target primary color of each pixel in other frame sub-images, so that the image data of two frame sub-images are transmitted to the display control chip at one time, and the data transmission efficiency is improved.
Fig. 4 is a flowchart of another data transmission method provided by the embodiment of the disclosure, which may be applied to the laser projection apparatus shown in fig. 1. As shown in fig. 4, the method may include:
step 401, the system-on-chip divides the projection image to obtain multiple frames of sub-images.
After the system-on-chip 10 acquires the projected image, if it is determined that the resolution of the projected image is greater than that of the light valve, the projected image may be segmented to obtain multiple frames of sub-images.
The resolution of the projected image is greater than that of the light valve, and the resolution of each frame of sub-image is not greater than that of the light valve. The resolution of the projected image may be m1 × n1, where m1 is the number of pixels per column in the projected image (i.e., m1 is the number of pixel rows), n1 is the number of pixels per row in the projected image (i.e., n1 is the number of pixel columns), and m1 and n1 are both positive integers greater than 1. Illustratively, m1 may be 7680 and n1 may be 4320, i.e., the projection image has a resolution of 8K.
The resolution of the light valve may be m2 × n2, where m2 is the number of each row of the plurality of micro-mirrors included in the light valve (i.e. m2 is the number of rows of micro-mirrors), n2 is the number of each row of the plurality of micro-mirrors included in the light valve (i.e. n2 is the number of columns of micro-mirrors), and m2 and n2 are both positive integers greater than 1. For example, m2 may be 3840, n2 may be 2160, and the resolution of the light valve may be 4K.
In the embodiment of the present disclosure, the system-on-chip 10 may determine the number of the multi-frame sub-images based on the resolution of the projected image and the resolution of the light valve, for example, the number F of the multi-frame sub-images may satisfy:
the
Shown is a rounding up.
Illustratively, if m1 is 7680, n1 is 4320, m2 is 3840, and n2 is 2160, then the composition is formulated as
The device is
Referring to FIG. 5, the system-on-chip divides the projected image into a 1 st frame sub-image, a 2 nd frame sub-image, a 3 rd frame sub-image, and a 4 th frame sub-imageFor a total of 4 frame sub-pictures.
In the embodiment of the present disclosure, the system on chip 10 may divide the projection image into a plurality of image blocks, and select pixels at the same position in each image block to form a frame sub-image, so as to obtain an F frame sub-image. That is, in the F frame sub-images, each frame sub-image is composed of pixels at the same position in a plurality of image blocks into which the projection image is divided, and the positions of the pixels in any two frame sub-images in the plurality of image blocks are different.
Wherein each image block may include F pixels, and for any frame of sub-image, the sub-image includes a plurality of pixels having the same relative position on the sub-image as the plurality of pixels on the projection image. Each image block may comprise t1 pixels in the row direction and t2 pixels in the column direction, the product of t1 and t2 being equal to F.
For example, assuming that m1 is 16, n1 is 12, i.e. the resolution of the projected image is 16 × 12, and f is 4, the system on chip 10 may divide the projected image into 48 image blocks, each of which may include 4 pixels, and each of which includes 2 pixels in the row direction and 2 pixels in the column direction. The system on chip 10 may select the pixel at the first position in each image block to form a 1 st frame sub-image, select the pixel at the second position in each image block to form a 2 nd frame sub-image, select the pixel at the third position in each image block to form a 3 rd frame sub-image, and select the pixel at the fourth position in each image block to form a 4 th frame sub-image, thereby obtaining 4 frames of sub-images.
The first position may be a position where a pixel in an upper left corner of each image block is located, the second position may be a position where a pixel in an upper right corner of each image block is located, the third position may be a position where a pixel in a lower left corner of each image block is located, and the fourth position may be a position where a pixel in a lower right corner of each image block is located.
Step 402, for each primary color, the system-on-chip determines the primary color's fraction of the plurality of primary colors in the projected image.
In the disclosed embodiment, each pixel in the projected image may include a plurality of primary colors, which may include a red primary color, a blue primary color, and a green primary color. For each primary color, the system on chip 10 may determine the ratio of the primary color to the plurality of primary colors in the projected image after dividing the projected image into a plurality of sub-images.
Wherein the ratio S of the jth primary color in the plurality of primary colors j Satisfies the following conditions:
j is a positive integer less than or equal to 3, M is the total number of the plurality of pixels in the projection image, and M = M1 × n1. The H ij The primary color value of the jth primary color of the ith pixel in the plurality of pixels in the projected image is n, which is the number of bits occupied by the primary color value of each primary color, i.e. the number of bits occupied by binary representation of the primary color value. Illustratively, n may be 8, 12, 24, or 32. The Z is the sum of the primary color values of the primary colors of the pixels in the projection image, i.e. Z = S 1 +S 2 +S 3 . The primary color values of the plurality of primary colors of each pixel may include a red primary color value, a blue primary color value, and a green primary color value.
Assuming that j is 1, the 1 st primary color is the blue primary color, and the resolution of the projected image is 7680X 4320, M et al 33177600, H i1 Is the primary color value of the 1 st primary color (i.e., the blue primary color) of the ith pixel of the plurality of pixels in the projected image.
Step 403, if there is a primary color whose ratio is outside the ratio range, the system on chip determines the primary color whose ratio is outside the ratio range as the target primary color.
After determining the ratio of each primary color to the plurality of primary colors in the projected image, if it is determined that there is a primary color whose ratio is outside the ratio range, the system-on-chip 10 may determine the primary color whose ratio is outside the ratio range as the target primary color. The occupation range is a fixed range pre-stored in the system-on-chip 10.
It can be understood that, for each primary color, if the ratio of the primary color is smaller than the lower limit of the ratio range, the system on chip 10 may determine that the ratio of the primary color in the projected image is smaller, and therefore, the primary color may be determined as the target primary color, so that the system on chip 10 does not need to transmit the primary color value of the target primary color of each pixel in the other frame sub-image in the at least two frame sub-images each time the image data of the at least two frame sub-images is transmitted, and it is ensured that the image data of the two frame sub-images can be transmitted at one time. Because the primary color occupies a small proportion in the projected image, when the display control chip 20 displays the other frame sub-images by adopting the primary color value of the target primary color of each pixel of one frame sub-image in at least two frame sub-images, the content of the projected image cannot be perceived by human eyes to change, and the display effect of the projected image is ensured.
If the ratio of the target primary colors is greater than the upper limit of the ratio range, the system on chip 10 may determine that the ratio of the target primary colors in the projection image is greater, for example, the projection image displayed on the projection screen is biased toward the target primary colors. Because the primary color has a large proportion in the projected image, when the display control chip 20 displays the other frame sub-images by using the primary color value of the target primary color of each pixel of one frame of sub-image in at least two frame sub-images, the human eyes do not obviously perceive the change of the content of the projected image, and the display effect of the projected image is ensured.
In the embodiment of the present disclosure, if the system on chip 10 determines that there are a plurality of primary colors whose duty ratio is outside the duty ratio range, any one of the plurality of primary colors may be determined as the target primary color. Alternatively, if there is a blue primary color in the plurality of primary colors whose ratio is outside the ratio range, the blue primary color may be determined as the target primary color. Because human eyes are not sensitive to blue, the blue is determined as the target primary color, and when the display control chip 20 displays the other frame sub-images by using the primary color value of the target primary color of each pixel of one frame sub-image of the at least two frame sub-images, the human eyes do not obviously perceive that the content of the projected image is changed, thereby ensuring the display effect of the projected image.
Step 404, if the occupation ratios of the plurality of primary colors in the projected image are all within the occupation ratio range, for each primary color, the system on chip determines the ratio of the sum of the primary color values of the primary colors of the target pixel in the projected image to the sum of the primary color values of the primary colors of the plurality of pixels.
If the system-on-chip 10 determines that the ratios of the plurality of primary colors in the projected image are all within the ratio range, it may be determined that the distributions of the plurality of primary colors in the projected image are relatively balanced, and therefore, for each primary color, the system-on-chip 10 may determine a ratio of a sum of the primary color values of the primary colors of the target pixel in the projected image to a sum of the primary color values of the primary colors of the plurality of pixels, that is, determine the ratio of a high primary color value in each primary color, where the high primary color value is greater than or equal to the threshold of the primary color value.
Wherein, for each primary color, the primary color value of the primary color of the target pixel is greater than or equal to the primary color value threshold. A ratio P of a jth primary color of the plurality of primary colors j Satisfies the following conditions:
the H vj Is a primary color value of a jth primary color of a vth target pixel of the plurality of target pixels, v being a positive integer less than or equal to Q being a positive integer less than or equal to M.
In the disclosed embodiment, the base color value threshold k may satisfy: k = w x y, where w is the maximum value of the base color values of the pixels in the projection image and y is a target percentage, which may be equal to 60%, for example. Assuming that y is equal to 60% and w is equal to 256, the base color value threshold k =256 × 60% =153.
For example, assuming that M1 is 3, n1 is 3, i.e., M is 9, j is 1, the 1 st primary color is a blue primary color, the primary color value threshold k is 153, and the primary color values of blue of 9 pixels in the projected image are 155, 120, 140, 170, 255, 200, 130, 225, and 220, respectively. Since the primary color values of the total 6 blues of 155, 170, 255, 200, 225 and 220 are greater than the primary color value threshold, the system-on-chip can determine that there are 6 target pixels, and further the system-on-chip 10 can determine the ratio P of the 1 st primary color 1 Satisfy the requirement of
Step 405, if there is a primary color with a ratio less than or equal to the ratio threshold, the system on chip determines the primary color with a ratio less than or equal to the ratio threshold as the target primary color.
After the system-on-chip 10 determines the ratio of each primary color, if there is a primary color whose ratio is less than or equal to the ratio threshold, the system-on-chip 10 may determine that the distribution of the high primary color values of the primary color in the projected image is less, and correspondingly, the distribution of the low primary color values of the primary color in the projected image (the low primary color values are less than the ratio threshold) is more, so that the system-on-chip 10 may determine the primary color whose ratio is less than or equal to the ratio threshold as the target primary color. The ratio threshold may be a fixed value pre-stored in the system-on-chip 10, for example, the ratio threshold may be 10%.
In an embodiment of the present disclosure, if the system-on-chip 10 determines that there are a plurality of primaries with a ratio smaller than or equal to the ratio threshold, any one of the plurality of primaries with a ratio smaller than or equal to the ratio threshold may be determined as the target primary.
In another embodiment of the present disclosure, if it is determined that there are a plurality of primary colors with a ratio less than or equal to a ratio threshold, and there is blue in the plurality of primary colors with the ratio less than or equal to the ratio threshold, the system-on-chip 10 may determine the primary color of blue as the target primary color.
For each primary color, the human eye cannot easily distinguish the low primary color value, so that the distribution of the high primary color value of the primary color in the projection image is less, and correspondingly, the distribution of the low primary color value of the primary color in the projection image is more. By determining the primary color with the ratio less than or equal to the ratio threshold as the target primary color, when the display control chip 20 displays the other frame of sub-image by using the primary color value of the target primary color of each pixel of one frame of sub-image in at least two frames of sub-images, human eyes will not perceive that the content of the projected image is changed, thereby ensuring the display effect of the projected image.
Step 406, if the ratios are all greater than the ratio threshold and the projected image has a primary color of blue, the system-on-chip determines that blue is the target primary color.
After determining that the ratios are all greater than the ratio threshold, the system-on-chip 10 may determine that the primary color of blue exists in the projection image, and then determine that the color of blue is the target primary color. If it is determined that the primary color of blue is not present in the projected image, any one of the plurality of primary colors in the projected image may be determined as the target primary color.
And step 407, the system-on-chip sequentially transmits the image data of the multiple frames of sub-images to the display control chip through the first data interfaces with the target number based on the display sequence of the multiple frames of sub-images.
After determining the target primary colors, the system-on-chip may sequentially transmit the image data of the multi-frame sub-images to the display control chip through the target number of first data interfaces based on the display order of the multi-frame sub-images.
The system-on-chip 10 transmits the image data of at least two frame sub-images to the display control chip 20 at a time, and the image data of at least two frame sub-images may include the primary color values of a plurality of primary colors of each pixel in one frame sub-image and the primary color values of other primary colors of each pixel in other frame sub-images except the target primary color.
In the embodiment of the present disclosure, the system-on-chip 10 may determine the display order of the plurality of frames of sub-images according to the arrangement positions of the plurality of frames of sub-images in the projection image. In one implementation manner of the embodiment of the present disclosure, the system on chip 10 may determine the display order along the pixel row direction based on the arrangement position of the multiple frames of sub-images. The arrangement positions of the sub-images at the end point position in the two adjacent rows of sub-images in the display sequence are adjacent, and the end point position refers to the starting point position or the end point position of the row of sub-images.
For example, referring to fig. 5, the system-on-chip 10 may determine that the display order of the multiple frame sub-images is the 1 st frame sub-image, the 2 nd frame sub-image, the 3 rd frame sub-image, and the 4 th frame sub-image, wherein the arrangement positions of the 2 nd frame sub-image at the end position in the first row of sub-images and the 3 rd frame sub-image at the end position in the second row of sub-images are adjacent in the display order.
In another implementation manner of the embodiment of the present disclosure, the system on chip 10 may determine the display order along the pixel column direction based on the arrangement position of the plurality of frames of sub-images. And the arrangement positions of the sub-images at the end points in the two adjacent columns of sub-images are adjacent in the display sequence.
For example, referring to fig. 5, the system-on-chip 10 may determine that the display order of the multiple frame sub-images is the 1 st frame sub-image, the 4 th frame sub-image, the 3 rd frame sub-image and the 2 nd frame sub-image, wherein the arrangement positions of the 1 st frame sub-image located at the start point in the first column of sub-images and the 4 th frame sub-image located at the start point in the second column of sub-images in the display order are adjacent.
Referring to fig. 1, if the target number is 5, the target primary color is blue, and the display order of the multi-frame sub-images is the 1 st frame sub-image, the 2 nd frame sub-image, the 3 rd frame sub-image, and the 4 th frame sub-image, the system on chip 10 may transmit the primary color values (i.e., G1, R1, and B1) of the plurality of primary colors of each pixel in the 1 st frame sub-image and the primary color values (G2 and R2) of the other primary colors of each pixel in the 2 nd frame sub-image to the display control chip 20 for the 1 st time. That is, G1, G2, R1, R2, and B1 may be transmitted to the display control chip 20 at the 1 st time.
Where G1 represents the primary color value of the green primary color of each pixel in the 1 st frame sub-image, R1 represents the primary color value of the red primary color of each pixel in the 1 st frame sub-image, B1 represents the primary color value of the blue primary color of each pixel in the 1 st frame sub-image, G2 represents the primary color value of the green primary color of each pixel in the 2 nd frame sub-image, and R2 represents the primary color value of the red primary color of each pixel in the 2 nd frame sub-image.
System-on-chip 10 may transmit to display control chip 20 the primary color values (i.e., G3, R3, and B3) for the plurality of primary colors for each pixel in the 3 rd frame sub-image, and the primary color values (G4 and R4) for the other primary colors for each pixel in the 4 th frame sub-image, except for the target primary color, at pass 2. That is, G3, G4, R3, R4, and B3 may be transmitted to the display control chip 20 at the 2 nd time.
Where G3 represents the primary color value of the green primary color of each pixel in the 3 rd frame sub-image, R3 represents the primary color value of the red primary color of each pixel in the 3 rd frame sub-image, B3 represents the primary color value of the blue primary color of each pixel in the 1 st frame sub-image, G4 represents the primary color value of the green primary color of each pixel in the 4 th frame sub-image, and R4 represents the primary color value of the red primary color of each pixel in the 4 th frame sub-image.
Step 408, for the received image data of at least two frame sub-images each time, the display control chip displays one frame sub-image based on the primary color values of the multiple primary colors of each pixel in one frame sub-image of the at least two frame sub-images, and displays the other frame sub-images based on the primary color values of the other primary colors of each pixel in the other frame sub-images and the primary color value of the target primary color of each pixel in the one frame sub-image.
In the process of receiving multiple frame sub-images sequentially sent by the system-on-chip 10, for the image data of at least two frame sub-images received each time, the display control chip 20 may display one frame sub-image based on the primary color values of multiple primary colors of each pixel in one frame sub-image of the at least two frame sub-images, and display other frame sub-images based on the primary color values of other primary colors of each pixel in other frame sub-images and the primary color value of the target primary color of each pixel in the one frame sub-image.
For example, referring to fig. 6, if the target number is 5, and the display control chip 20 receives G1, G2, R1, R2, and B1 transmitted by the system-on-chip 10 for the first time, the display control chip 20 may display the 1 st frame sub-image based on G1, R1, and B1, and may display the 2 nd frame sub-image based on G2, R2, and B1. If the display control chip 20 receives G3, G4, R3, R4, and B3 transmitted by the system on chip 10 for the second time, the display control chip 20 may display the 3 rd frame sub-image based on G3, R3, and B3, and may display the 4 th frame sub-image based on G4, R4, and B3.
In the embodiment of the present disclosure, if there is a primary color of blue in the projected image, the system-on-chip 10 may determine blue as the target primary color without performing the above-mentioned steps 402 to 406.
It should be noted that the sequence of the steps of the data transmission method provided by the embodiment of the present disclosure may be appropriately adjusted, and the steps may also be deleted according to the situation, for example, if there is a primary color of blue in the projected image, the system on chip 10 may determine that blue is the target primary color, and then may delete the above steps 402 to 406. Any method that can be easily conceived by those skilled in the art within the technical scope of the present disclosure is covered by the protection scope of the present disclosure, and thus, the detailed description thereof is omitted.
In summary, the embodiment of the present disclosure provides a data transmission method, in a process that a system-on-chip sequentially transmits multiple frames of sub-images to a display control chip, image data of at least two frames of sub-images can be transmitted each time, and the image data of the at least two frames of sub-images includes base color values of multiple base colors of each pixel in one frame of sub-image and base color values of other base colors of each pixel in other frames of sub-images except for a target base color. Therefore, the display control chip can display one frame of sub-image based on the primary color values of the multiple primary colors of each pixel in one frame of sub-image in the at least two frames of sub-images, and display other frames of sub-images based on the primary color values of the other primary colors of each pixel in other frames of sub-images and the primary color value of the target primary color of each pixel in the one frame of sub-image. The primary color value of the target primary color of each pixel in other frame sub-images does not need to be transmitted, so that the effect of transmitting the image data of at least two frame sub-images to the display control chip at one time is realized, and the data transmission efficiency is further improved.
Referring to fig. 1, the laser projection apparatus may include a system-on-chip 10 and a display control chip 20, where a target number of first data interfaces of the system-on-chip 10 is connected with a target number of second data interfaces of the display control chip 20.
A system-on-chip 10 for:
dividing the projected image to obtain a plurality of frames of sub-images, wherein the resolution of the projected image is greater than that of the light valve, and the resolution of each frame of sub-image is not greater than that of the light valve;
based on the display sequence of the multi-frame sub-images, sequentially transmitting the image data of the multi-frame sub-images to the display control chip 20 through a target number of first data interfaces, wherein the image data of at least two frames of sub-images are transmitted to the display control chip 20 each time, and the image data of at least two frames of sub-images comprise basic color values of a plurality of basic colors of each pixel in one frame of sub-image and basic color values of other basic colors of each pixel in other frame sub-images except for the target basic color;
the display control chip 20 is configured to: for each received image data of at least two frames of sub-images, one frame of sub-image is displayed based on the base color values of the plurality of base colors of each pixel in one frame of sub-image of the at least two frames of sub-images, and the other frame of sub-images is displayed based on the base color values of the other base colors of each pixel in the other frame of sub-images and the base color value of the target base color of each pixel in the one frame of sub-image.
In summary, the embodiment of the present disclosure provides a laser projection apparatus, in a process that a system-on-chip sequentially transmits multiple frames of sub-images to a display control chip, image data of at least two frames of sub-images may be transmitted each time, and the image data of the at least two frames of sub-images includes primary color values of multiple primary colors of each pixel in a frame of sub-image, and primary color values of other primary colors of each pixel in other frames of sub-images except for a target primary color. Therefore, the display control chip can display one frame of sub-image based on the primary color values of the multiple primary colors of each pixel in one frame of sub-image in the at least two frame of sub-images, and display other frame of sub-images based on the primary color values of the other primary colors of each pixel in the other frame of sub-images and the primary color value of the target primary color of each pixel in the one frame of sub-image. As the primary color value of the target primary color of each pixel in other frame sub-images does not need to be transmitted, the effect of transmitting the image data of at least two frame sub-images to the display control chip at one time is realized, and the data transmission efficiency is further improved.
Optionally, the system-on-chip 10 is further configured to:
for each primary color, determining the proportion of the primary colors in the projection image;
and determining the primary color with the proportion outside the proportion range as the target primary color.
Optionally, the ratio S of the jth primary color in the plurality of primary colors j Satisfies the following conditions:
where M is the total number of pixels in the projected image, H ij Is a base color value of a jth base color of an ith pixel of the plurality of pixels in the projected image, n is a number of bits occupied by the base color value of each base color, and Z is a sum of the base color values of the plurality of base colors of the plurality of pixels in the projected image.
Optionally, the system-on-chip 10 is further configured to:
if the occupation ratios of the multiple primary colors in the projected image are all located in the occupation ratio range, determining the ratio of the sum of the primary color values of the primary colors of the target pixel in the projected image to the sum of the primary color values of the multiple pixels for each primary color, wherein the primary color value of the primary color of the target pixel is greater than or equal to a primary color value threshold value;
and determining the primary color of which the ratio is less than or equal to the ratio threshold value as the target primary color.
Optionally, the base color value threshold k satisfies: k = w × y; w is the maximum value of the base color values of the pixels in the projection image and y is the target percentage.
Optionally, the system-on-chip 10 is further configured to:
if a primary color of blue exists in the projected image, the color blue is determined as the target primary color.
In summary, the embodiments of the present disclosure provide a laser projection apparatus, in a process that a system-on-chip sequentially transmits multiple frames of sub-images to a display control chip, image data of at least two frames of sub-images may be transmitted each time, and the image data of the at least two frames of sub-images includes base color values of multiple base colors of each pixel in one frame of sub-image and base color values of other base colors of each pixel in other frame of sub-images except for a target base color. Therefore, the display control chip can display one frame of sub-image based on the primary color values of the multiple primary colors of each pixel in one frame of sub-image in the at least two frame of sub-images, and display other frame of sub-images based on the primary color values of the other primary colors of each pixel in the other frame of sub-images and the primary color value of the target primary color of each pixel in the one frame of sub-image. The primary color value of the target primary color of each pixel in other frame sub-images does not need to be transmitted, so that the effect of transmitting the image data of at least two frame sub-images to the display control chip at one time is realized, and the data transmission efficiency is further improved.
The disclosed embodiments provide a computer-readable storage medium, in which instructions are stored, and the instructions are loaded and executed by a processor to implement the data transmission method shown in the above embodiments. For example, the steps performed by the system-on-chip 10 in the embodiment shown in fig. 2 or 4, or the steps performed by the display control chip 20 in the embodiment shown in fig. 3 or 4 may be implemented.
The embodiments of the present disclosure provide a computer program product containing instructions, which when run on a computer, cause the computer to execute the data transmission method shown in the above embodiments. For example, the steps performed by the system-on-chip 10 in the embodiment shown in fig. 2 or 4, or the steps performed by the display control chip 20 in the embodiment shown in fig. 3 or 4 may be implemented.
The disclosed embodiments provide a laser projection device, which may further include a processor and a memory, where the memory stores instructions that are loaded and executed by the processor to implement the data transmission method as shown in the above embodiments. For example, the steps performed by the system-on-chip 10 in the embodiment shown in fig. 2 or 4, or the steps performed by the display control chip 20 in the embodiment shown in fig. 3 or 4 may be implemented.
In the disclosed embodiments, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" in the embodiments of the present disclosure means two or more.
The above description is intended only to illustrate the preferred embodiments of the present disclosure, and should not be taken as limiting the disclosure, as any modifications, equivalents, improvements and the like which are within the spirit and principle of the present disclosure should be included in the scope of the present disclosure.
Claims (10)
1. A laser projection device is characterized by comprising a system-on-chip and a display control chip, wherein a target number of first data interfaces of the system-on-chip are connected with a target number of second data interfaces of the display control chip;
the system-on-chip is used for:
dividing a projected image to obtain a plurality of frames of sub-images, wherein the resolution of the projected image is greater than that of a light valve, and the resolution of each frame of sub-image is not greater than that of the light valve;
based on the display sequence of the multi-frame sub-images, sequentially transmitting the image data of the multi-frame sub-images to the display control chip through the target number of first data interfaces, wherein the image data of at least two frames of sub-images are transmitted to the display control chip each time, and the image data of the at least two frames of sub-images comprise basic color values of a plurality of basic colors of each pixel in one frame of sub-image and basic color values of other basic colors of each pixel in other frame sub-images except for the target basic color;
the display control chip is used for: for each received image data of at least two frame sub-images, displaying the frame sub-image based on the primary color values of the plurality of primary colors of each pixel in the frame sub-image in the at least two frame sub-images, and displaying the other frame sub-images based on the primary color values of the other primary colors of each pixel in the other frame sub-images and the primary color value of the target primary color of each pixel in the frame sub-image.
2. The laser projection device of claim 1, wherein the system-on-chip is further configured to:
for each primary color, determining the ratio of the primary color to a plurality of primary colors in the projected image;
and determining the primary color with the proportion outside the proportion range as the target primary color.
3. A laser projection device as claimed in claim 2,
a ratio S of a jth primary color of the plurality of primary colors j Satisfies the following conditions:
wherein M is the total number of the plurality of pixels in the projection image, and H ij The primary color value of the jth primary color of the ith pixel in the plurality of pixels in the projected image, n is the number of bits occupied by the primary color value of each primary color, and Z is the sum of the primary color values of the plurality of primary colors of the plurality of pixels in the projected image.
4. The laser projection device of claim 2 or 3, wherein the system-on-chip is further configured to:
if the occupation ratios of the multiple primary colors in the projected image are all located in the occupation ratio range, determining the ratio of the sum of the primary color values of the primary colors of the target pixel in the projected image to the sum of the primary color values of the multiple pixels for each primary color, wherein the primary color value of the primary color of the target pixel is greater than or equal to a primary color value threshold value;
and determining the primary color of which the ratio is less than or equal to a ratio threshold value as the target primary color.
5. A laser projection device as claimed in claim 4,
the base color value threshold k satisfies: k = w × y; the w is a maximum value of base color values of pixels in the projection image, and the y is a target percentage.
6. The laser projection device of claim 1, wherein the system-on-chip is further configured to:
and if a primary color with the color of blue exists in the projected image, determining the blue color as the target primary color.
7. A method of data transmission, the method comprising:
dividing a projected image to obtain a plurality of frames of sub-images, wherein the resolution of the projected image is greater than that of a light valve, and the resolution of each frame of sub-image is not greater than that of the light valve;
based on the display sequence of the multiple frames of sub-images, sequentially transmitting the image data of the multiple frames of sub-images to the display control chip through the first data interfaces with the target number;
the image data of at least two frames of sub-images are transmitted to the display control chip each time, and the image data of the at least two frames of sub-images comprise basic color values of a plurality of basic colors of each pixel in one frame of sub-image and basic color values of other basic colors of each pixel in other frame of sub-images except for a target basic color; the image data of the at least two frame sub-images transmitted to the display control chip each time is used for instructing the display control chip to display the frame sub-image based on the primary color values of the multiple primary colors of each pixel in the frame sub-image in the at least two frame sub-images, and to display the other frame sub-images based on the primary color values of the other primary colors of each pixel in the other frame sub-images and the primary color value of the target primary color of each pixel in the frame sub-image.
8. The method of claim 7, further comprising:
for each primary color, determining the ratio of the primary color to a plurality of primary colors in the projected image;
and determining the primary color with the proportion outside the proportion range as the target primary color.
9. The method of claim 7, further comprising:
and if a primary color with the color of blue exists in the projected image, determining the blue color as the target primary color.
10. A method of data transmission, the method comprising:
receiving the image data of multiple frame sub-images in sequence through the target number of second data interfaces, wherein the image data of at least two frame sub-images are received each time, and the image data of the at least two frame sub-images comprise basic color values of multiple basic colors of each pixel in one frame sub-image and basic color values of other basic colors of each pixel in other frame sub-images except the target basic color;
for each received image data of the at least two frame sub-images, displaying the frame sub-image based on the primary color values of the plurality of primary colors of each pixel in the frame sub-image of the at least two frame sub-images, and displaying the other frame sub-images based on the primary color values of the other primary colors of each pixel in the other frame sub-images and the primary color value of the target primary color of each pixel in the frame sub-image.
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| CN202110915610.4A CN115706787A (en) | 2021-08-10 | 2021-08-10 | Laser projection equipment and data transmission method |
| PCT/CN2022/102553 WO2023274331A1 (en) | 2021-06-29 | 2022-06-29 | Projection device, and transmission method for projected image data |
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| CN202110915610.4A CN115706787A (en) | 2021-08-10 | 2021-08-10 | Laser projection equipment and data transmission method |
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