CN116828162B - Display system and display control method - Google Patents
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3102—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3138—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using arrays of modulated light sources
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3179—Video signal processing therefor
- H04N9/3182—Colour adjustment, e.g. white balance, shading or gamut
Abstract
The invention discloses a display system and a display control method, and relates to the technical field of display. According to the original color gamut of the light source light generated by the light source device and the target color gamut corresponding to the target display mode, the target parameters are obtained, and then the light modulation device is controlled according to the original parameters and the target parameters, so that the color accuracy can be improved, and the display effect can be improved; in addition, the invention adopts a light mixing scheme on time sequence, can realize the mixing of narrow spectrum light and wide spectrum light, and realizes the natural transition of gray scale and color level.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display system and a display control method.
Background
Projectors are widely used in a variety of contexts, such as office briefs, playing movies, device art, and the like. The light sources of the projector at present comprise a laser light source, an LED light source, a fluorescent light source and the like, and the fluorescent light can be excited by monochromatic laser to obtain higher brightness, but the color is poorer. The three-color laser has high color, but has color edge phenomenon, speckle is difficult to eliminate, and the cost is high. By adopting the scheme of mixing the two, the brightness can be improved, the problems of color edges and speckles can be solved, and the comfort level of a user can be improved.
Disclosure of Invention
The mixed light source scheme in the display field comprises a narrow spectrum light source, such as a laser light source, and a wide spectrum light source, such as a fluorescent light source or an LED light source, so that time sequence control of various colors is realized, gray scale transition is natural, brightness is improved, and a media playing effect is controlled. In view of this, the present invention provides a display system and a display control method.
In a first aspect, the present invention provides a display system comprising a color gamut subsystem and/or a timing subsystem, and a light modulation device for modulating light source light into image light;
the color gamut subsystem comprises:
the color gamut adjusting module is used for obtaining target parameters according to the original color gamut of the light source light and the target color gamut corresponding to the target display mode, wherein the target parameters comprise target color coordinates and target brightness gains of red light, green light, blue light and white light, or comprise target color coordinates and target brightness gains of red light, green light, blue light and white light and target color coordinates and target brightness gains of at least one of cyan light, magenta light and yellow light;
the control module is used for controlling the light modulation device according to original parameters and the target parameters, wherein the original parameters comprise original color coordinates and original brightness proportions of red light, green light, blue light and white light corresponding to the original color gamut;
The timing subsystem includes:
a light source device for generating light source light, the light source light at least comprising a first light, a second light and a third light, the first light is light with a narrow spectrum, the second light is light with a wide spectrum, the third light comprises light with a narrow spectrum or a wide spectrum, the first light and the second light have the same color, or the spectrum of the second light at least comprises the spectrum of the first light;
a mode switching module, configured to determine a target display mode, where the target display mode includes a mode one or a mode two, and when the mode switching module determines that the target display mode is a mode one, the output time of the first light is consistent with the output time of the second light, and the output time of the third light is not overlapped with the output time of the first light; when the mode switching module determines that the target display mode is mode two, the output time of the first light is greater than or less than or equal to the output time of the second light, the output time of the first light at least partially overlaps with the output time of the second light, and the output time of the third light at least partially overlaps with the output time of the first light.
In a second aspect, the present invention provides a display control method applied to a display system including a light source device for generating light source light, the method comprising:
controlling a light source device to generate light source light, wherein the light source light at least comprises first light, second light and third light, the first light is light with a narrow spectrum, the second light is light with a wide spectrum, the third light comprises light with a narrow spectrum or a wide spectrum, the first light and the second light are the same in color, or the spectrum of the second light at least comprises the spectrum of the first light;
a color gamut control process and/or a timing control process, wherein,
the color gamut control process includes:
obtaining target parameters according to the original color gamut of the light source light and the target color gamut corresponding to the target display mode, wherein the target parameters comprise target color coordinates and target brightness gains of red light, green light, blue light and white light, or comprise target color coordinates and target brightness gains of red light, green light, blue light and white light and target color coordinates and target brightness gains of at least one of cyan light, magenta light and yellow light;
controlling a light modulation device according to original parameters and the target parameters, wherein the original parameters comprise original color coordinates and original brightness proportions of red light, green light, blue light and white light corresponding to the original color gamut;
The timing control process includes:
determining a target display mode, wherein the target display mode comprises a mode one or a mode two;
when the target display mode is determined to be mode one, controlling the output time of the first light and the output time of the second light to be consistent, wherein the output time of the third light is not overlapped with the output time of the first light; when the target display mode is determined to be a mode two, controlling the output time of the first light to be larger than or smaller than or equal to the output time of the second light, wherein the output time of the first light at least partially overlaps with the output time of the second light, and the output time of the third light at least partially overlaps with the output time of the first light.
In a possible implementation manner, the third light includes a first sub-light and a second sub-light, the first sub-light is light with a narrow spectrum or a wide spectrum, the second sub-light is light with a narrow spectrum or a wide spectrum, and the colors of the first sub-light and the second sub-light are different;
when the target display mode is mode one, the output time of the first sub light and the output time of the second sub light are not overlapped; when the target display mode is mode two, the output time of at least two of the first light, the first sub light and the second sub light at least partially overlaps.
In a possible implementation manner, the light source light further includes a fourth light, where the fourth light is a light with a broad spectrum, and the fourth light and the first sub-light have the same color, or a spectrum of the fourth light at least includes a spectrum of the first sub-light;
when the target display mode is mode one, the output time of the first sub light is consistent with the output time of the fourth light; when the target display mode is mode two, the output time of the first sub-light is greater than or less than or equal to the output time of the fourth light, and the output time of the first sub-light and the output time of the fourth light are at least partially overlapped.
In a possible implementation manner, the light source light further includes a fifth light, where the fifth light is light with a narrow spectrum or a broad spectrum, and the fifth light is the same color as the second sub-light;
when the target display mode is mode one, the output time of the fifth light is within the output time of the second sub light; when the target display mode is mode two, the output time of the fifth light is within the output time of at least one of the first light, the second light, the first sub-light, the second sub-light, and the fourth light.
In a possible implementation manner, the lighting time of at least one of all light sources of the light source device in one lighting period is distributed in a first sub-period and a second sub-period, and the lighting time distributed in the first sub-period and the second sub-period is discontinuous, wherein each lighting period comprises the first sub-period and the second sub-period; and the lighting time of all the light sources in two adjacent lighting periods is discontinuous.
In one possible implementation manner, the duration of each lighting period of all the light sources of the light source device is greater than or equal to 9% of the duration of one lighting period.
In a possible implementation manner, the light source device includes a first light source, a second light source, an excitation light source and a wavelength conversion device, where the first light source is used to generate the first light, the second light source is used to generate the first sub-light, the excitation light source is used to generate the excitation light, the wavelength conversion device includes a conversion region and a light guiding region, the conversion region and the light guiding region are sequentially located on an optical path of the excitation light, the conversion region includes a first sub-conversion region, the first sub-conversion region is used to generate the second light under irradiation of incident light, and the light guiding region is used to guide the excitation light and generate the second sub-light.
In a possible implementation manner, the conversion region further includes a second sub-conversion region, where the first sub-conversion region and the second sub-conversion region of the conversion region are sequentially located on the optical path of the excitation light, and the second sub-conversion region is used to generate fourth light under irradiation of the incident light.
In a possible implementation manner, the light source device further includes a third light source, where the third light source is used to generate supplementary light, where the supplementary light is light with a narrow spectrum or a broad spectrum, and a wavelength of the supplementary light is less than or equal to 480nm;
the third light source is lightened in the lightening time of the excitation light source, and the supplementary light is used for irradiating at least one sub-conversion area of the conversion area and/or the light guide area; or,
and the supplemental light is processed to obtain fifth light.
In a possible implementation manner, the obtaining the target parameter according to the original color gamut of the light source light and the target color gamut corresponding to the target display mode includes:
the target color coordinates of the white light and the original color coordinates are kept consistent, and the target luminance gain of the white light is determined to be 1.
In a possible implementation manner, the obtaining the target parameter according to the original color gamut of the light source light and the target color gamut corresponding to the target display mode includes:
Determining target color coordinates of red light, green light and blue light according to an intersection of the original color gamut and the target color gamut, wherein the target color coordinates of the red light are coordinates corresponding to a point with the maximum x value in the intersection; the target color coordinates of the green light are coordinates corresponding to the point with the largest y value in the intersection; the target color coordinates of the blue light are coordinates corresponding to a point in the intersection where the sum of the x value and the y value is minimum.
In a possible implementation manner, the obtaining the target parameter according to the original color gamut of the light source light and the target color gamut corresponding to the target display mode further includes:
obtaining the target maximum brightness of the red light according to the original color coordinates and the original brightness of the red light, the green light and the blue light corresponding to the original color gamut and the target color coordinates and the first brightness of the red light;
obtaining the target maximum brightness of the green light according to the original color coordinates and the original brightness of the red light, the green light and the blue light corresponding to the original color gamut and the target color coordinates and the second brightness of the green light;
obtaining the target maximum brightness of the blue light according to the original color coordinates and the original brightness of the red light, the green light and the blue light corresponding to the original color gamut and the target color coordinates and the third brightness of the blue light;
And obtaining target brightness gains of the red light, the green light and the blue light according to the target color coordinates and the target maximum brightness of the red light, the green light and the blue light and the target color coordinates and the target brightness of the white light, wherein the target brightness of the white light is the same as the original brightness of the white light corresponding to the original color gamut.
In a possible implementation manner, when the target display mode is one mode, obtaining the target parameter according to the original color gamut of the light source light and the target color gamut corresponding to the target display mode includes:
obtaining target color coordinates of at least one of cyan light, magenta light and yellow light according to target color coordinates and target brightness of at least two of red light, green light and blue light;
and determining that the target brightness gain of at least one of the cyan light, the magenta light and the yellow light is N, and the value range of N is 0-2.
In a possible implementation manner, when the target display mode is the mode two, the obtaining the target parameter according to the original color gamut of the light source light and the target color gamut corresponding to the target display mode includes at least one of the following:
obtaining target color coordinates of magenta light according to target color coordinates and target brightness of red light and blue light;
Obtaining a target color coordinate of yellow light according to the target color coordinates and target brightness of red light and green light and the original color coordinates and original brightness of first mixed light, wherein the first mixed light is obtained when a light source generating red light and a light source generating green light are simultaneously lightened;
and obtaining the target color coordinates of the cyan light according to the target color coordinates and the target brightness of the green light and the blue light and the original color coordinates and the original brightness of the second mixed light, wherein the second mixed light is the mixed light obtained when the light source generating the green light and the light source generating the blue light are simultaneously lightened.
According to the original color gamut of the light source light generated by the light source device and the target color gamut corresponding to the target display mode, the target parameters are obtained, and then the light modulation device is controlled according to the original parameters and the target parameters, so that the color accuracy can be improved, and the display effect can be improved; in addition, the invention adopts a light mixing scheme on time sequence, can realize the mixing of narrow spectrum light and wide spectrum light, and realizes the natural transition of gray scale and color level. By the arrangement of the invention, the display system can be set into different modes, such as one mode with low white field brightness and high pure color brightness, which is suitable for cinema mode, and the other mode with high white field brightness and high pure color brightness, which is lower in pure color brightness, which is suitable for office mode, and can also comprise modes between the two modes, which is suitable for different application scenes. Meanwhile, the display system can be compatible with a wide color gamut low-brightness mode and a low color gamut high-brightness mode, has no trouble of laser speckles and no color edge problem, and can greatly improve user experience.
Drawings
Fig. 1 is a schematic diagram of a functional module of a display device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a display device according to an embodiment of the present invention;
fig. 3 is a schematic flow chart of a display control method according to an embodiment of the present invention;
FIGS. 4-5 are schematic diagrams illustrating a method for determining RGB target color coordinates according to an embodiment of the present invention;
FIGS. 6-18 are diagrams illustrating output time of each light according to embodiments of the present invention;
fig. 19 is a schematic structural diagram of a light source device according to an embodiment of the present invention;
fig. 20 to fig. 31 are schematic views of lighting time of each light source according to an embodiment of the present invention.
Detailed Description
In order to better understand the technical solutions of the present invention, the following description will clearly and completely describe the technical solutions of the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. While the present disclosure has been described in terms of an exemplary embodiment or embodiments, it should be understood that each aspect of the disclosure may be separately provided as a complete solution. The following embodiments and features of the embodiments may be combined with each other without conflict.
In the present invention, for the purpose of clearly describing the technical solutions of the embodiments of the present invention, the words "first", "second", etc. are used to distinguish identical items or similar items having substantially identical functions and actions, and those skilled in the art will understand that the words "first", "second", etc. do not limit the number and execution order, but merely serve to illustrate and distinguish between the objects to be described, without separating the order, nor do they represent that the number of devices or messages in the embodiments of the present invention is particularly limited, and cannot constitute any limitation of the embodiments of the present invention. "plurality" means two or more, and the like, means that the element or article recited in the preceding word "comprise" or "comprises", and the like, is meant to encompass the element or article listed thereafter and equivalents thereof without precluding other elements or articles.
In order that the invention may be fully understood, a detailed description will be provided below in order to illustrate the technical aspects of the invention. Preferred embodiments of the present invention are described in detail below, however, the present invention may have other embodiments in addition to these detailed descriptions.
Fig. 1 is a schematic diagram of a functional module of a display device according to an embodiment of the present invention. As shown in fig. 1, the display device includes an image processor 101 and an optical engine 102. Wherein:
The image processor 101 may be a microcontroller, a dedicated image processing chip, etc., and the microcontroller may be an ARM chip, a micro control unit (Microcontroller Unit; MCU), etc.; the dedicated image processing chip may be an image signal processor (Image Signal Processing, ISP), a graphics processor (graphics processing unit, GPU), an embedded neural network processor (neural-network process units, NPU), or the like. The image processor 101 may be used for video decoding, image quality processing, and the like.
The light engine 102 may include a driver chip, a light modulation device, a light source, and the like. Wherein the light source may include a laser light source, an LED light source, a fluorescent light source, a UV light source, etc.; the light modulation means may be a digital micromirror device (Digtial Micromirror Devices, DMD), a liquid crystal device (Liquid Crystal Display, LCD), a liquid crystal on silicon device (Liquid Crystal on Silicon, LCOS), or the like, for modulating light source light to generate image light; the driver chip corresponds to the light modulation device, for example, the digital micromirror device can be driven by digital light processing (Digital Light Processing, DLP). The optical machine 102 is used for projecting an image to be projected into a projection screen.
In some embodiments, the display device also includes a central controller 103, which may be a CPU, ARM, MCU or like controller, of one or more processing cores. The central controller 103 is a control center of the display device, and connects various parts of the entire display device using various interfaces and lines, and can run or execute software programs and/or an operating system stored in the storage module 104, and call up data stored in the storage module 104. Alternatively, the image processor 101 and the central controller 103 may be integrated as one processor.
In some embodiments, the display device also includes storage module 104, input module 105, and communication module 106, power supply 107, etc., of one or more computer-readable storage media. It will be appreciated by those skilled in the art that the display device structure shown in fig. 1 is not limiting of the display device and may include more or fewer components than shown, or may combine certain components, or a different arrangement of components. Wherein:
the memory module 104 may be used to store software programs and an operating system, and the central controller 103 executes various functional applications and data processing by running the software programs and the operating system stored in the memory module 104. The storage module 104 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like; the storage data area may store data created according to the use of the display device, and the like. In addition, the memory module 104 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage device. Accordingly, the memory module 104 may also include a memory controller to provide access to the memory module 104 by the central controller 103.
The display device may also include an input module 105, which input module 105 may be used to receive entered numeric or character information and to generate remote control, keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control.
The display device may also include a communication module 106, and in some embodiments the communication module 106 may include a wireless module, through which the display device may wirelessly transmit over short distances, thereby providing wireless broadband internet access to the user. For example, the communication module 106 may be used to assist a user in accessing streaming media, and the like.
The display device also includes a power supply 107 for powering the various components, and in some embodiments, the power supply 107 may be logically connected to the central controller 103 via a power management system, such that charge, discharge, and power consumption management functions are performed by the power management system. The power supply 107 may also include one or more of any of a direct current or alternating current power supply, a recharging system, a power failure detection circuit, a power converter or inverter, a power status indicator, and the like.
Fig. 2 is a schematic structural diagram of a display device according to an embodiment of the present invention. As shown in fig. 2, the display apparatus includes a light source device 201, an illumination system 202, a light modulation device 203, and an imaging system 204. The light source light generated by the light source device 201 is irradiated onto the light modulation device 203 through the illumination system 202, the light modulation device 203 modulates the incident light source light into image light, the image light enters the imaging system 204, and finally the image light is imaged on a projection target such as a screen, thereby forming a projection screen. The light modulation device 203 may be any one of DMD, LCOS, LCD; imaging system 204 is typically a lens system, such as a projection lens.
In addition, the display apparatus may further include a light source control module (not shown in the drawing) that may control the operation of one or more light sources in the light source device 201 such that the light source device 201 emits light of a prescribed wavelength band required when generating an image. Further, the light source device 201, the illumination system 202, the light modulation device 203, and the imaging system 204 may be included in the light engine 102 (refer to fig. 1).
The light source device 201 is configured to generate light source light, and may include one or more light sources. The light source may be a laser light source, an LED light source, a fluorescent light source, a UV light source, or the like. Further, the light source may be a single light emitting element or an array of light emitting elements, and the array of light emitting elements may include light emitting elements of different colors. For example, the light source may be an LD light source or an LED light source, which generates blue light or green light or red light, or the light source may be a multicolor laser, that is, an array of light emitting elements including a plurality of lasers, for example, the light source may include a blue laser and a red laser, or include a blue laser and a green laser, or include a blue laser, a red laser, and a green laser at the same time.
In the display device adopting the light mixing scheme, the light source device 201 generates light source light including at least a narrow spectrum light and a broad spectrum light, for example, the light source light includes a first light and a second light, the first light is a light with a narrow spectrum, the second light is a light with a broad spectrum, further, the light source light may further include a third light, the third light includes a light with a narrow spectrum or a broad spectrum, the first light and the second light have the same color, or the spectrum of the second light includes at least the spectrum of the first light, for example, the first light and the second light are red or green, the third light includes blue light and green light, or the first light is red or green, the second light is yellow, and the third light is blue. It should be understood that the source light may also include more light, as embodiments of the invention are not limited in this respect.
The illumination system 202 is a part from the light source device 201 to the light modulation device 203 for illuminating the light modulation device 203 with the light source light emitted from the light source device 201, e.g. the illumination system 202 may comprise one or more lenses.
In the display device, the display effect of the original color gamut of the light source light generated by the light source device 201 is not good, such as the original color gamut may be large, and in some scenes, the color gamut is too large, which may cause color distortion or too glare of the display screen, and affect the user experience. In some embodiments, a color gamut subsystem may also be included in the display device to debug based on the original color gamut to enhance the display effect. With continued reference to fig. 2, the display device further includes a color gamut adjusting module 212 and a control module 213, where the color gamut adjusting module 212 is configured to obtain target parameters according to an original color gamut of the light source light and a target color gamut corresponding to the target display mode, where the target parameters include target color coordinates and target brightness gains of red light, green light, blue light, and white light, or include target color coordinates and target brightness gains of red light, green light, blue light, and white light, and target color coordinates and target brightness gains of at least one of cyan light, magenta light, and yellow light; the control module 213 is configured to control the light modulation device 203 according to the target parameter obtained by the color gamut adjusting module 212, so as to achieve the target requirement.
Fig. 3 is a flow chart of a display control method according to an embodiment of the present invention. As shown in fig. 3, the display control method includes:
s1001, obtaining a target parameter according to an original color gamut of the light source light and a target color gamut corresponding to a target display mode, where the target parameter includes target color coordinates and target brightness gains of red light (R), green light (G), blue light (B), and white light (W), or includes target color coordinates and target brightness gains of red light, green light, blue light, and white light, and target color coordinates and target brightness gains of at least one of cyan light (C), magenta light (M), and yellow light (Y). In the embodiment of the present invention, the red light herein refers to light when only a light source generating light including a red light spectrum is lighted; green light refers to light when only a light source that generates light including a green spectrum is on; blue light refers to light when only a light source that generates light including a blue light spectrum is on; the cyan light is light obtained by mixing green light and blue light, or light obtained by simultaneously lighting a light source generating green light and a light source generating blue light, which are lighted at the previous time, or light obtained by lighting a light source generating blue light and a light source generating green light at the latter time, which is left by human eyes; the magenta light is light obtained by mixing red light and blue light, or light obtained by lighting a light source generating red light at the previous time and lighting a light source generating blue light at the latter time through human vision, or light obtained by lighting a light source generating red light and a light source generating blue light at the same time; the yellow light is light obtained by mixing red light and green light, or light sources which generate red light and green light are lightened at the previous moment through human eye vision residues, and the light sources which generate green light are lightened at the next moment, or light sources which generate red light and light sources which generate green light are lightened simultaneously, and the dominant wavelength range of red light is 600-660 nm, the dominant wavelength range of blue light is 440-460 nm, the dominant wavelength range of green light is 500-580 nm, the dominant wavelength range of yellow light is 580-595nm, the dominant wavelength range of cyan light is 470-500nm, and the dominant wavelength range of magenta light is 580-600nm.
The original color gamut of the display device may be obtained by measurement and then the measurement data is stored in the display device, i.e. the Y (luminance) xy (color coordinates) values of RGBW are known, and in the embodiment of the invention, the original parameters include the original color coordinates of RGBW and the original luminance ratio of RGBW, the original luminance ratio of RGBW being equal to the ratio of the respective original luminance to the original luminance of W, e.g. the original luminance ratio of R being equal to the ratio of the original luminance YB of R to the original luminance YW of W, the original luminance ratio of W being equal to 1. The original brightness proportion is adopted instead of the original brightness, so that the accuracy is improved. Optionally, the original color gamut may also include at least one of CMY, and the original parameters may also include an original color coordinate and an original luminance ratio of at least one of CMY, which may also be obtained by measurement.
When the display mode is determined, the target color gamut is also determined, if the target color gamut corresponding to the mode one is the P3 color gamut, and the target color gamut corresponding to the mode two is the Rec709 color gamut, the display device can select the corresponding display mode or target color gamut according to the needs, and the display mode or target color gamut can also be selected by the user. In other embodiments, the target gamut of the display device may also be fixed, i.e. the display device has only one target gamut.
The target parameters may include only the target color coordinates and target luminance gain of RGBW, and optionally, the target parameters may further include the target color coordinates and target luminance gain of any one of CMY, further improving the color level. The embodiments of the present invention will be described in detail taking the target color coordinates and the target luminance gain, whose target parameters include rgbccmyw, as examples. Where R represents red light, G represents green light, B represents blue light, C represents cyan light, M represents magenta light, Y represents yellow light, and the color coordinates are represented by (x, Y).
In some embodiments, the target brightness gain of W is set to 1, the target white point is consistent with the original white point, i.e., the target color coordinates of W and the original color coordinates are consistent, the white balance state is not changed, and the brightness before and after the color gamut adjustment is unchanged.
Further, the target color coordinates and target luminance gain of RGB may be obtained according to the original color coordinates and original luminance of RGB corresponding to the original color gamut and the color coordinates of RGB corresponding to the target color gamut, and then the target color coordinates and target luminance gain of CMY may be obtained according to the target color coordinates and target luminance of RGB, optionally, the target luminance gain of CMY may be set to a constant N, where the value range of N is 0-2, and preferably, N is equal to 1. One specific algorithm is given by way of example below.
1. And calculating the target color coordinates of RGB.
Specifically, determining target color coordinates of RGB according to an intersection of an original color gamut and a target color gamut, wherein the target color coordinates of R are coordinates corresponding to a point with the maximum x value in the intersection; the target color coordinates of G are coordinates corresponding to the point with the largest y value in the intersection; and B, the target color coordinates are coordinates corresponding to a point with the minimum sum of the x value and the y value in the intersection.
Fig. 4-5 are schematic diagrams of a method for determining RGB target color coordinates according to an embodiment of the present invention. As shown in fig. 4 and fig. 5, in the polygon vertex sets of the two triangles of the original color gamut and the target color gamut, the target color point with the largest y value is G, the target color point with the largest x value is R, and the target color point with the smallest x+y value is B, so as to determine the target color coordinates R (xRT, yRT), G (xGT, yGT), and B (xBT, yBT) of RGB.
2. The target luminance gain of RGB is calculated.
Obtaining target maximum brightness Ymax_R of R according to the original color coordinates and original brightness of RGB corresponding to the original color gamut, and the target color coordinates and first brightness of R; obtaining target maximum brightness Ymax_G of G according to the original color coordinates and original brightness of RGB corresponding to the original color gamut and the target color coordinates and second brightness of G; obtaining target maximum brightness Ymax_B of B according to the original color coordinates and original brightness of RGB corresponding to the original color gamut and the target color coordinates and third brightness of B; obtaining target brightness gains MR, MG and MB of RGB according to the target color coordinates and the target maximum brightness of RGB and the target color coordinates and the target brightness of W, wherein the first brightness, the second brightness and the third brightness are assumed intermediate values; the target maximum brightness is the maximum brightness after the original RGB is mixed to the RGB target color point, so that the brightness of W obtained by combining the RGB after the color gamut adjustment can be ensured to be equal to the target brightness of W.
In the embodiment of the present invention, it is assumed that the first luminance, the second luminance, and the third luminance are all 100; the original luminance color points of RGB are R (Y1, x1, Y1), G (Y2, x2, Y2), B (Y3, x3, Y3), respectively; the target luminance color points of RGB are R (Y 'RT, xRT, yRT), G (Y' GT, xGT, yGT), B (Y 'BT, xBT, yBT), wherein the values of Y' RT, Y 'GT, Y' BT are all 100, and the calculation method of the target maximum luminance Ymax_R of R is as follows:
M01 = y1*((xRT-x3)*y2-(yRT-y3)*x2+x3*yRT-xRT*y3)/(yRT*((x3-x2)*y1+(x2-x1)*y3+(x1-x3)*y2))
M02 = -y2*((xRT-x3)*y1-(yRT-y3)*x1+x3*yRT-xRT*y3)/(yRT*((x3-x2)*y1+(x2-x1)*y3+(x1-x3)*y2))
M03 = y3*((x2-x1)*yRT-(y2-y1)*xRT+x1*y2-x2*y1)/(yRT*((x2-x1)*y3-(y2-y1)*x3+x1*y2-x2*y1))
M1 =M01 * Y’RT / Y1
M2 = M02 * Y’RT / Y2
M3 = M03 * Y’RT / Y3
Mmax = max(M1，M2，M3)
Ymax_R = M1 / Mmax * Y1 + M2 / Mmax * Y2+ M3 / Mmax * Y3
similarly, the target maximum luminance ymax_ G, ymax _b of GB can be calculated by replacing the target luminance color point (Y ' RT, xRT, yRT) of R with the target luminance color point (Y ' GT, xGT, yGT) of GB, and B (Y ' BT, xBT, yBT). Then, the original luminance color point R (Y1, x1, Y1) of RGB in the above formula, G (Y2, x2, Y2), B (Y3, x3, Y3) are replaced by the target maximum luminance color point R (Ymax_R, xRT, yRT) of RGB, G (Ymax_G, xGT, yGT), B (Ymax_B, xBT, yBT), and the target luminance color point (Y' RT, xRT, yRT) of R is replaced by the target luminance color point (YWT, xWT, yWT) of W, thus obtaining the target luminance gain MR, MG, MB of RGB.
Further, the actual target luminance YRT, YGT, YBT of RGB may also be obtained according to the target luminance gains MR, MG, MB of RGB, where yrt=mr×ymax_r, ygt=mg×ymax_g, ybt=mb×ymax_b.
In other embodiments, the target luminance gain of RGB may be set to a value between 0-2.
3. The target color coordinates of CMY are calculated.
Assuming tristimulus values XYZ, the target XYZ values of RGB may be calculated first from the target Yxy values of RGB, then the target XYZ values of CMY may be calculated from the target XYZ values of RGB, and then the target Yxy values of CMY may be calculated from the target XYZ values of CMY, where the formula for calculating the Yxy values from the XYZ values is as follows:
x=X/（X+Y+Z）， y=Y/（X+Y+Z）；
the calculation formula for calculating XYZ values from Yxy values is as follows:
X=（x/y）Y， Z= （(1−x−y)/y）Y；
and Y values among the XYZ values and Yxy values coincide.
The following relationship exists between the target XYZ values of CMY and RGB:
XCT = XGT + XBT ， YCT = YGT + YBT ， ZCT = ZGT + ZBT；
XMT = XRT + XBT ， YMT = YRT + YBT ， ZMT = ZRT + ZBT；
XYT = XRT + XGT ， YYT = YRT + YGT ， ZYT = ZRT + ZGT；
wherein XCT, YCT, ZCT is the target XYZ values of C, respectively; XMT, YMT, ZMT are the target XYZ values of M, respectively; XYT, YYT, ZYT are target XYZ values of Y, respectively; XRT, YRT, ZRT are target XYZ values of R, respectively; XGT, YGT, ZGT are target XYZ values of G, respectively; XBT, YBT, ZBT are the target XYZ values of B, respectively.
Alternatively, the target luminance gain of CMY may be equal to the ratio of the respective target luminance to the sum of the target luminances of their respective two primary colors, such as mc=yct/(ygt+ybt), mm=ymt/(yrt+ybt), my= YYT/(yrt+ygt).
S1002, controlling the light modulation device according to original parameters and target parameters, wherein the original parameters comprise original color coordinates and original brightness proportions of RGBW corresponding to an original color gamut.
After the color gamut adjusting module 212 obtains the target parameter, the original parameter and the target parameter may be sent to the control module 213, so that the control module 213 controls the light modulation device to implement color gamut control and improve color accuracy.
With continued reference to fig. 2, the display apparatus may further include a mode switching module 211 for determining a target display mode, where the mode switching module 211 may select a corresponding display mode according to need, or may determine the target display mode according to a selection instruction of a user. In different display modes, the timing of the light source light generated by the light source device 201 may also be different, for example, when the target display mode is mode one, the output time of the first light and the output time of the second light are consistent, and the output time of the third light and the output time of the first light are not overlapped; when the target display mode is the mode two, the output time of the first light is greater than or less than or equal to the output time of the second light, the output time of the first light and the output time of the second light are at least partially overlapped, and the output time of the third light and the output time of the first light are at least partially overlapped, so that different display requirements are met. For example, assuming that the first light is red laser light, the second light is yellow fluorescent light or red fluorescent light, and the third light is cyan light, the timing sequence corresponding to the first mode is shown in fig. 6, the timing sequence corresponding to the second mode is shown in fig. 7 or fig. 8, and it should be understood that the timing sequence corresponding to the second mode is not limited to those shown in fig. 7 and fig. 8, and the switching between the first mode and the second mode only needs to adjust the lighting time of the corresponding light source.
Further, the third light may include a first sub-light and a second sub-light, the first sub-light being a narrow spectrum or a broad spectrum light, the second sub-light being a narrow spectrum or a broad spectrum light, the first sub-light and the second sub-light being different in color; illustratively, the first light, the first sub-light, and the second sub-light are different in color, and the colors of the first light, the first sub-light, and the second sub-light are selected from red, green, and blue. When the target display mode is mode one, the output time of the first sub light and the output time of the second sub light are not overlapped; when the target display mode is mode two, the output time of at least two of the first light, the first sub light and the second sub light at least partially overlaps. For example, assuming that the first light is green laser light, the second light is green fluorescent light or yellow fluorescent light, the first sub-light is blue laser light, and the second sub-light is red laser light, the corresponding timing of the first mode is shown in fig. 9, the corresponding timing of the second mode is shown in fig. 10 or 11, and it should be understood that the corresponding timing of the second mode is not limited to those shown in fig. 10 and 11, and the switching between the first mode and the second mode only needs to adjust the lighting time of the corresponding light source.
Optionally, the light source light further includes a fourth light, where the fourth light is a broad spectrum light, and the fourth light and the first sub-light have the same color, or the spectrum of the fourth light at least includes the spectrum of the first sub-light; when the target display mode is mode one, the output time of the first sub light is consistent with the output time of the fourth light; when the target display mode is mode two, the output time of the first sub-light is greater than or less than or equal to the output time of the fourth light, and the output time of the first sub-light and the output time of the fourth light are at least partially overlapped. For example, assuming that the first light is red laser light, the second light is yellow fluorescent light or red fluorescent light, the first sub-light is green laser light, the second sub-light is blue laser light, and the fourth light is green fluorescent light, the corresponding timing sequence of the first mode is shown in fig. 12, the corresponding timing sequence of the second mode is shown in fig. 13, fig. 14 or fig. 15, it should be understood that the corresponding timing sequence of the second mode is not limited to those shown in fig. 13-fig. 15, and the switching between the first mode and the second mode only needs to adjust the lighting time of the corresponding light source.
Optionally, the light source light further includes a fifth light, the fifth light being a light with a narrow spectrum or a broad spectrum, the fifth light being the same color as the second sub-light; when the target display mode is mode one, the output time of the fifth light is within the output time of the second sub light; when the target display mode is mode two, the output time of the fifth light is within the output time of at least one of the first light, the second light, the first sub-light, the second sub-light, and the fourth light. For example, assuming that the first light is red laser light, the second light is red fluorescent light or yellow fluorescent light, the first sub-light is green laser light, the second sub-light is blue laser light, the fourth light is green fluorescent light or yellow fluorescent light, and the fifth light is blue laser light, the corresponding timing sequence of the first mode is shown in fig. 16, the corresponding timing sequence of the second mode is shown in fig. 17 or fig. 18, it should be understood that the corresponding timing sequence of the second mode is not limited to those shown in fig. 17-fig. 18, and the switching between the first mode and the second mode only needs to adjust the lighting time of the corresponding light source.
It should be understood that, when the light source light includes the first light, the second light, the first sub-light, the second sub-light, the fourth light and the fifth light at the same time, assuming that the first light is red light, the first sub-light is green light, the second sub-light is blue light, and the fifth light is blue light, the red light in the above step S1001 is composed of only the first light and/or the second light, the green light is composed of only the first sub-light and/or the fourth light, and the blue light is composed of only the second sub-light and/or the fifth light.
Alternatively, when the target display mode is the mode two, the above-mentioned step S1001 may further consider the original color coordinates and the original brightness of the corresponding mixed light when calculating the target color coordinates and the target brightness gain of CMY, so as to further improve the accuracy of color gamut adjustment, for example, obtain the target color coordinates of yellow light according to the target color coordinates and the target brightness of red light and green light and the original color coordinates and the original brightness of first mixed light, which is the mixed light obtained when the light source generating red light and the light source generating green light are simultaneously turned on, for example, the overlapping portion of the output times of the first light and the first sub light shown in fig. 17; for example, the target color coordinates of the green light and the target brightness of the blue light are obtained according to the target color coordinates and the target brightness of the green light and the original color coordinates and the original brightness of the second mixed light, wherein the second mixed light is the mixed light obtained when the light source generating the green light and the light source generating the blue light are simultaneously lighted, for example, the overlapping part of the output time of the first sub light and the second sub light shown in fig. 17.
In some embodiments, to avoid the long-time lighting of the light source, which causes heat accumulation, in each lighting period, the lighting time of the light source may be split into 2 segments, such as splitting the lighting period into a first sub-period and a second sub-period, and the lighting time of the corresponding light source in one lighting period is controlled to be distributed in the first sub-period and the second sub-period according to needs, and the lighting time distributed in the first sub-period and the second sub-period is discontinuous; and the lighting time of all the light sources in two adjacent lighting periods is discontinuous. Further, the duration of each lighting period of all the light sources is more than or equal to 9% of the duration of one lighting period, so that the lighting time of each time is ensured. The lighting period can be the lighting time length of the light source in a frame of picture, for example, for 4K, the general requirement is 240HZ, and in corresponding 4.167ms, the light source is conventionally lighted once respectively, but in order to solve the problem of heat accumulation, the light source is split into lighting for 2 times and more, so that the efficiency of the laser is improved, and the service life of the laser is prolonged.
It should be noted that, in the embodiment of the present invention, the generation manners of the first light, the second light, the first sub-light, the second sub-light, the fourth light and the fifth light are not limited.
Illustratively, the light source device 201 includes a first light source for generating the first light, a second light source for generating the first sub-light, an excitation light source for generating the excitation light, and a wavelength conversion device including a conversion region and a light guiding region sequentially located on an optical path of the excitation light, the conversion region including a first sub-conversion region for generating the second light under irradiation of incident light thereof, and the light guiding region for guiding the excitation light and generating the second sub-light. Further, the conversion region of the wavelength conversion device may further include a plurality of sub-conversion regions, such as the conversion region further includes a second sub-conversion region, where the first sub-conversion region and the second sub-conversion region of the conversion region are sequentially located on the optical path of the excitation light, and the second sub-conversion region is configured to generate fourth light under irradiation of the incident light. Optionally, the light source device further includes a third light source, where the third light source is used to generate complementary light, where the complementary light is light with a narrow spectrum or a broad spectrum, and the wavelength of the complementary light is less than or equal to 480nm, where the complementary light may be used to irradiate the wavelength conversion device, or may be used to form outgoing light of the light source device after other optical treatments without the wavelength conversion device, where the outgoing light and the complementary light are both blue lasers, and the dominant wavelengths of the two are selected from 455nm and 465 nm. In this embodiment, the multiplexing excitation light, for example, the excitation light is blue laser, can improve the utilization efficiency of the blue laser; in addition, compared with a single wavelength, the blue laser with two different wavelengths is used for emitting, the speckle of the blue laser can be improved, and after fluorescence is mixed, the speckle condition can be greatly improved while the brightness is improved.
Fig. 19 is a schematic structural diagram of a light source device according to an embodiment of the present invention. As shown in fig. 19, the light source device includes a light source module, a first beam reduction system 03, a light guiding element 05, a first shaping lens group 07, a wavelength conversion device 09, a second shaping lens group 10, a light guiding element 12, a first light combining element 15, a third shaping lens group 16, a light homogenizing element 18, and a diffusing element 19.
The light source assembly comprises a first light source 01, a second light source 02 and a light splitting and combining assembly, wherein the light source assembly is used for emitting red laser, green laser and blue laser, and the light combining mode of the light source assembly is not limited. The first light source 01 is a laser light source, may be a single light emitting element or an array of light emitting elements, and the array of light emitting elements may include light emitting elements of different colors, for example, the first light source 01 may include a monochromatic laser generating blue light or green light or red light, or the first light source 01 may be a polychromatic laser, that is, an array of light emitting elements including multiple lasers, for example, the first light source 01 may include a blue laser and a red laser, or include a blue laser and a green laser, or include a blue laser, a red laser and a green laser at the same time.
With continued reference to fig. 19, in the embodiment of the present invention, the first light source 01 is a light emitting element array including RGB three-color lasers, and two red laser beams generated by the first light source 01 are emitted after being reflected by the first light splitting and combining element DM 1; part of light in the green laser is reflected by the second light splitting and combining element DM2 and then is emitted by the first light splitting and combining element DM1, and the other part of light is transmitted by the second light splitting and combining element DM2 and then is emitted into the third light splitting and combining element DM3, and is reflected by the third light splitting and combining element DM3 and then is emitted by the first light splitting and combining element DM 1; blue laser generated by the first light source 01 is reflected by the fourth light splitting and combining element DM4, the light spot of green laser can be enlarged through DM2 and DM3, and then the blue laser is re-emitted into the light homogenizing element, so that the speckle phenomenon of the projection equipment can be reduced.
The second light source 02 may be a laser light source, an LED light source, a fluorescent light source, or the like. Further, the second light source 02 may be a single light emitting element or an array of light emitting elements, and the array of light emitting elements may include light emitting elements of different colors. For example, the second light source 02 may be an LD light source or an LED light source or a UV light source, etc. generating blue light or green light or red light, or the second light source 02 may be a multicolor laser, that is, an array of light emitting elements including a plurality of lasers, for example, the second light source 02 may include a blue laser and a red laser, or include a blue laser and a green laser, or include a blue laser, a red laser, and a green laser at the same time. In the embodiment of the present invention, the second light source 02 is a blue laser light source, and the blue laser light generated by the second light source 02 and the blue laser light generated by the first light source 01 are emitted after being combined by the fourth light splitting and combining element DM 4. In other embodiments, the light source assembly may not include the second light source 02, but only the first light source 01, and the fourth light splitting and combining element DM4 may be a mirror.
In the embodiment of the present invention, after passing through the fourth light splitting and combining element DM4, the optical paths of the blue laser generated by the second light source 02 and the blue laser generated by the first light source 01 may be identical or different, and may only illuminate a partial area of the wavelength conversion device 09, or may illuminate all areas of the wavelength conversion device 09, for example, the wavelength conversion device 09 includes a conversion area and a light guiding area, then the blue laser generated by the first light source 01 may be used to illuminate the conversion area and the light guiding area of the wavelength conversion device 09, and the blue laser generated by the second light source 02 is used to illuminate the conversion area or the light guiding area of the wavelength conversion device 09, or vice versa; if the conversion region of the wavelength converting device 09 includes a plurality of sub-conversion regions, the blue laser light generated by the second light source 02 and/or the blue laser light generated by the first light source 01 may illuminate only a part of the sub-conversion regions, or may illuminate all of the sub-conversion regions. In other embodiments, the blue laser light generated by the first light source 01 or the second light source 02 may also be emitted as the light (i.e., the light source light) of the light source device without passing through the wavelength conversion device 09.
The first beam reduction system 03 may comprise one or more lenses, for example, the first beam reduction system 03 comprises two lenses, as shown in fig. 19, and may be omitted in other embodiments, such as when the spot of the second light source 02 is smaller.
The light guiding element 05 is configured to transmit the blue laser light generated by the light source assembly to the wavelength conversion device 09, and reflect the fluorescent light generated by the wavelength conversion device 09 and the blue laser light reflected by the wavelength conversion device 09. The light guiding element 05 may be an aperture beam splitter or an aperture mirror.
The first shaping lens group 07 is used to focus the laser light onto the wavelength conversion device 09, and shape the outgoing light of the wavelength conversion device 09 into quasi-collimated light. The first shaping lens group 07 may include one or more lenses, and the first shaping lens group 07 may include two lenses, as illustrated in fig. 19, for example.
The wavelength conversion device 09 includes a conversion region for generating fluorescence under irradiation of its incident blue laser light, a light guiding region, and a diffusion region, wherein the conversion region may include one or more sub-conversion regions, such as a first sub-conversion region and a second sub-conversion region; the light guiding area is used for guiding the incident blue laser, such as a reflecting area or a transmitting area, and further, the light guiding area can also diffuse the incident blue laser, such as a reflecting mirror or a transparent area provided with a diffusion sheet; the diffusion region is used to transmit and diffuse the red laser light and the green laser light generated by the first light source 01. Alternatively, the wavelength conversion device 09 may have only a conversion region and a diffusion region, that is, one of the first light source 01 and the second light source 02 generates blue laser light for irradiating the wavelength conversion device to generate fluorescence (blue laser light as excitation light is not multiplexed), and the other generates blue laser light as blue light in the light source light emitted from the light source device. In the embodiment of the present invention, the conversion area, the light guiding area and the diffusion area are integrated color wheel, and in other embodiments, the conversion area, the light guiding area and the diffusion area may be multiple separated elements.
The second shaping lens set 10 includes one or more lenses for further shaping the fluorescence light, which may be omitted.
The light guide element 12 is configured to transmit red laser light and green laser light, and reflect blue laser light. Alternatively, the size of the light guiding element 12 is equal to or larger than the size of the light guiding element 05, and the sizes of the long side and the short side of the light guiding element 12 are equal to or larger than the sizes of the long axis and the short axis of the spot of the red laser light and the green laser light, respectively.
The first light combining element 15 is configured to reflect fluorescent light (e.g., yellow light, or green and red light) and transmit blue laser light, red laser light, and green laser light. In some embodiments, the first light combining element 15 may be an open mirror, the laser light is transmitted from the open area, and the fluorescence light is reflected from the remaining non-open area. In other embodiments, the first light combining element 15 may be an open-hole light splitting sheet, and the blue laser and the green laser are transmitted from the open-hole area, and the light splitting area may be coated with a light splitting film for transmitting the reflected fluorescence of the red laser due to the larger general divergence angle and larger light spot of the red laser, where the main wavelength of the red laser is about 650nm, the red fluorescence is wide spectrum, and the main wavelength is about 620nm, so that the light can be combined in wavelength by coating. Alternatively, the first light combining element 15 may not have any hole, and may directly transmit blue laser light, red laser light, and green laser light through a coating film and reflect fluorescence.
The third set of shaping lenses 16 is used to focus the light beam such that substantially all of the light beam is incident on the surface of the light homogenizing element 18. The third shaping lens set 16 may include one or more lenses, and illustratively the third shaping lens set 16 includes two lenses, as shown in fig. 19.
With continued reference to fig. 19, the light source device generates light source light including red light, green light, and blue light, wherein:
red light source: the blue laser generated by the first light source 01 and/or the second light source 02 excites red fluorescent powder on the wavelength conversion device 09 to obtain red fluorescent light at least comprising a spectrum band of 600-650 nm, and the red laser generated by the first light source 01 is directly irradiated out through the light guide element 12 and the first light combining element 15;
green light source: the blue laser generated by the first light source 01 and/or the second light source 02 excites the green fluorescent powder on the wavelength conversion device 09 to obtain green fluorescence at least comprising a spectrum band of 540-580 nm, and the red laser generated by the first light source 01 is directly irradiated out through the light guide element 12 and the first light combining element 15;
blue light source: blue laser light generated by the first light source 01 and/or the second light source 02 is reflected by the light guiding region of the wavelength conversion device 09, and is irradiated out through the light guiding element 05, the first light combining element 15 and the light guiding element 12.
When the display mode is mode one, the laser light and the fluorescence light of the same color are completely synchronous, the output time is completely consistent, the lighting time of each light source is shown as figure 20, in the embodiment of the invention, the RLD represents the red laser in the first light source 01, the G LD represents the green laser in the first light source 01, the B1 LD represents the blue laser in the first light source 01, the B2 LD represents the second light source 02, the A1 represents the sub-period of the B1 LD for generating the red fluorescence light, the B1 represents the sub-period of the B1 LD for generating the green fluorescence light, the C1 represents the sub-period of the B1 LD for generating the blue fluorescence light, the A2 represents the sub-period of the B2 LD for generating the green fluorescence light, and the C2 represents the sub-period of the B2 LD for generating the blue laser light, thus better red, green and blue pure brightness can be obtained, and the picture display brightness is high; when the display mode is mode two, the laser light sources with driving time can be independently controlled, and the laser light sources with two or more colors can be simultaneously lightened at certain moments on the basis of mode one, so that the brightness of a white field is greatly improved, wherein R LD and G LD can be independently controlled in time sequence, B1 LD is used for exciting fluorescence and generating blue light, B2 LD is used for supplementing blue laser, the time sequence can be completely the same as that of B1 LD, B2 LD can be independently controlled, only 2 or 1 light can be excited, or only one light can be generated, different brightness can be obtained in this case, the power consumption is reduced, and different color gamut and brightness can be obtained by adjusting current, as shown in fig. 21-24.
In the light source device shown in fig. 19, the red laser and the green laser in the first light source 01 may be used to generate the first light and the first sub-light, the blue laser in the first light source 01 and/or the second light source 02 may be used to generate the excitation light, the excitation light irradiates the first conversion region of the wavelength conversion device 09 to obtain the second light, irradiates the second sub-conversion region of the wavelength conversion device 09 to obtain the fourth light, irradiates the light guiding region (e.g., reflection region) of the wavelength conversion device 09 to obtain the second sub-light, and the second light source 02 may be used to generate the fifth light. In other embodiments, the light guiding region may be replaced by a conversion region provided with cyan powder.
In some embodiments, the conversion area of the wavelength conversion device 09 may include only a yellow fluorescent area or a green fluorescent area, and when the display mode is one mode, the lighting time of each light source when the second light source 02 is not included is shown in fig. 25, and the lighting time of each light source when the second light source 02 is included is shown in fig. 26; when the display mode is the mode two, the lighting time of each light source is shown in fig. 27 or 28 when the second light source 02 is not included, and the lighting time of each light source is shown in fig. 29 to 31 when the second light source 02 is included.
Since the wavelength conversion means 09 is a fixed partition, and therefore is typically a pure laser to match fluorescence, different modes can be compatible in the same device by adjusting the lighting duration of the red and/or green lasers in the first light source 01 and/or the second light source 02. As the switching from the second mode shown in fig. 21 to the first mode shown in fig. 20, it is only necessary to shorten the lighting time of rld and gnd; in addition, as shown in fig. 25, the switching from the first mode to the second mode shown in fig. 28 is only required to increase the lighting time of the rld.
In some embodiments, to avoid the heat accumulation caused by the long-time lighting of the laser, in each lighting period, the lighting time of the laser light source may be split into 2 segments, for example, the lighting period is split into a first sub-period and a second sub-period, where the lighting time of each of the R LD, G LD and B1 LD is lit according to the time sequence, further, the lighting time of each of the R LD, G LD and B1 LD may be equal to or greater than 9% of the lighting period duration, in the second sub-period, if the display mode is the mode one, the R LD, G LD and B1 LD are still lit according to the time sequence, and if the display mode is the mode two, some of the periods in the second sub-period are lit simultaneously to avoid the heat accumulation, thereby improving the efficiency and the lifetime of the laser. It should be understood that when the display mode is mode two, LD of two or three colors may be simultaneously lighted for some of the two sub-periods. The B2 LD may be turned on during the time when the B1 LD is turned on, or the B2 LD may be controlled individually as needed. The time-series lighting herein means that the sum of the lighting periods of the respective light sources is equal to the period of the corresponding period, and the lighting periods of the respective light sources do not overlap.
It should be noted that, the corresponding transmission function in the above embodiment may be changed into reflection, and the reflection function is changed into transmission, so that the function implementation of the whole light path is not affected, and the embodiments of the present invention will not be described in detail.
It is to be understood that the term "module" of embodiments of the present invention may refer to an application specific integrated circuit (application specific integrated circuit, ASIC), an electronic circuit, a processor (e.g., a shared, dedicated, or group processor, etc.) and memory that execute one or more software or firmware programs, a combinational logic circuit, and/or other suitable components that support the described functionality. The modules described as separate components may or may not be physically separate, and components shown as modules may or may not be physical modules, that is, may be located in one place, or may be distributed over a plurality of network modules, where some or all of the modules may be selected according to actual needs to achieve the purposes of the embodiment of the present invention. The division of the modules is merely a logic function division, and there may be other division manners in actual implementation, for example, one module or component may be divided into multiple modules or components, or multiple modules or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or modules, which may be in electrical, mechanical, or other forms.
Those of ordinary skill in the art will appreciate that the various illustrative modules and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (29)
1. A display system, comprising a color gamut subsystem and/or a timing subsystem, and a light modulation device for modulating light from a light source into image light;
the color gamut subsystem comprises:
The color gamut adjusting module is used for obtaining target parameters according to the original color gamut of the light source light and the target color gamut corresponding to the target display mode, wherein the target parameters comprise target color coordinates and target brightness gains of red light, green light, blue light and white light, or comprise target color coordinates and target brightness gains of red light, green light, blue light and white light and target color coordinates and target brightness gains of at least one of cyan light, magenta light and yellow light;
the control module is used for controlling the light modulation device according to original parameters and the target parameters, wherein the original parameters comprise original color coordinates and original brightness proportions of red light, green light, blue light and white light corresponding to the original color gamut;
the timing subsystem includes:
a light source device for generating light source light, the light source light at least comprising a first light, a second light and a third light, the first light is light with a narrow spectrum, the second light is light with a wide spectrum, the third light comprises light with a narrow spectrum or a wide spectrum, the first light and the second light have the same color, or the spectrum of the second light at least comprises the spectrum of the first light;
A mode switching module, configured to determine a target display mode, where the target display mode includes a mode one or a mode two, and when the mode switching module determines that the target display mode is a mode one, the output time of the first light is consistent with the output time of the second light, and the output time of the third light is not overlapped with the output time of the first light; when the mode switching module determines that the target display mode is a mode two, the output time of the first light is greater than or less than or equal to the output time of the second light, the output time of the first light at least partially overlaps with the output time of the second light, and the output time of the third light at least partially overlaps with the output time of the first light;
the third light comprises a first sub light and a second sub light, the first sub light is light with a narrow spectrum or a wide spectrum, the second sub light is light with a narrow spectrum or a wide spectrum, and the colors of the first sub light and the second sub light are different;
when the mode switching module determines that the target display mode is mode one, the output time of the first sub light and the output time of the second sub light are not overlapped; when the mode switching module determines that the target display mode is mode two, output time of at least two of the first light, the first sub light and the second sub light at least partially overlap.
2. A display system according to claim 1, wherein the light source light further comprises a fourth light, the fourth light being broad spectrum light, the fourth light and the first sub-light being the same color, or the spectrum of the fourth light comprising at least the spectrum of the first sub-light;
when the mode switching module determines that the target display mode is mode one, the output time of the first sub light is consistent with the output time of the fourth light; when the mode switching module determines that the target display mode is a mode two, the output time of the first sub-light is greater than or less than or equal to the output time of the fourth light, and the output time of the first sub-light at least partially overlaps with the output time of the fourth light.
3. A display system according to claim 2, wherein the light source light further comprises a fifth light, the fifth light being a narrow spectrum or a broad spectrum light, the fifth light being the same color as the second sub-light;
when the mode switching module determines that the target display mode is mode one, the output time of the fifth light is within the output time of the second sub light; when the mode switching module determines that the target display mode is mode two, the output time of the fifth light is within the output time of at least one of the first light, the second light, the first sub light, the second sub light, and the fourth light.
4. The display system according to claim 1, wherein lighting times of at least one of all light sources of the light source device in one lighting period are distributed in a first sub-period and a second sub-period, and the lighting times distributed in the first sub-period and the second sub-period are discontinuous, wherein each lighting period includes the first sub-period and the second sub-period; and the lighting time of all the light sources in two adjacent lighting periods is discontinuous.
5. A display system according to claim 1, wherein the duration of each lighting of all the light sources of the light source device is 9% or more of the duration of one lighting period.
6. A display system according to claim 1, wherein the light source arrangement comprises a first light source for generating the first light, a second light source for generating the first sub-light, an excitation light source for generating the excitation light, and a wavelength conversion device comprising a conversion region and a light guiding region, which are in turn located in the light path of the excitation light, the conversion region comprising a first sub-conversion region for generating the second light under irradiation of the incident light, the light guiding region for guiding the excitation light and generating the second sub-light.
7. The display system according to claim 6, wherein the conversion region further comprises a second sub-conversion region, the first sub-conversion region and the second sub-conversion region of the conversion region being sequentially located on the optical path of the excitation light, the second sub-conversion region being configured to generate a fourth light under irradiation of the incident light, the light source light comprising the fourth light, the fourth light and the first sub-light being the same color, or a spectrum of the fourth light comprising at least a spectrum of the first sub-light;
when the mode switching module determines that the target display mode is mode one, the output time of the first sub light is consistent with the output time of the fourth light; when the mode switching module determines that the target display mode is a mode two, the output time of the first sub-light is greater than or less than or equal to the output time of the fourth light, and the output time of the first sub-light at least partially overlaps with the output time of the fourth light.
8. A display system according to claim 7, wherein the light source device further comprises a third light source for generating supplementary light, the supplementary light being light of a narrow spectrum or a wide spectrum, the supplementary light having a wavelength of 480nm or less;
The third light source is lightened in the lightening time of the excitation light source, and the supplementary light is used for irradiating at least one sub-conversion area of the conversion area and/or the light guide area; or,
the supplementary light is processed to obtain fifth light, the light source light comprises the fifth light, and when the mode switching module determines that the target display mode is mode one, the output time of the fifth light is within the output time of the second sub light; when the mode switching module determines that the target display mode is mode two, the output time of the fifth light is within the output time of at least one of the first light, the second light, the first sub light, the second sub light, and the fourth light.
9. A display system according to claim 3 or 8, wherein the second sub-light and the fifth light are both light of a narrow spectrum, the dominant wavelengths of the second sub-light and the fifth light being selected from 455nm and 465nm, respectively.
10. The display system of claim 6, wherein the first sub-light and the second sub-light are each light of a narrow spectrum, and the first light source, the second light source, and the excitation light source are integrally packaged.
11. The display system according to claim 1, wherein the first light, the first sub-light, and the second sub-light are different in color, and wherein the first light, the first sub-light, and the second sub-light are selected from red, green, and blue.
12. A display system according to claim 1, wherein the second light is yellow or green or red in color.
13. A display system according to claim 2, wherein the fourth light is green or red or yellow in color.
14. The display system according to claim 6, wherein each lighting period includes a first sub-period in which a sum of lighting durations of the first light source, the second light source, and the excitation light source is equal to a duration of the first sub-period, and lighting times of the first light source, the second light source, and the excitation light source do not overlap; in the second sub-period, the lighting time of at least two of the first light source, the second light source and the excitation light source partially overlaps.
15. The display system according to claim 1, wherein the obtaining the target parameter according to the original color gamut of the light source light and the target color gamut corresponding to the target display mode comprises:
The target color coordinates of the white light and the original color coordinates are kept consistent, and the target luminance gain of the white light is determined to be 1.
16. The display system according to claim 1, wherein the obtaining the target parameter according to the original color gamut of the light source light and the target color gamut corresponding to the target display mode comprises:
determining target color coordinates of red light, green light and blue light according to an intersection of the original color gamut and the target color gamut, wherein the target color coordinates of the red light are coordinates corresponding to a point with the maximum x value in the intersection; the target color coordinates of the green light are coordinates corresponding to the point with the largest y value in the intersection; the target color coordinates of the blue light are coordinates corresponding to a point in the intersection where the sum of the x value and the y value is minimum.
17. The display system according to claim 1, wherein obtaining the target parameter according to the original color gamut of the light source light and the target color gamut corresponding to the target display mode further comprises:
obtaining the target maximum brightness of the red light according to the original color coordinates and the original brightness of the red light, the green light and the blue light corresponding to the original color gamut and the target color coordinates and the first brightness of the red light;
Obtaining the target maximum brightness of the green light according to the original color coordinates and the original brightness of the red light, the green light and the blue light corresponding to the original color gamut and the target color coordinates and the second brightness of the green light;
obtaining the target maximum brightness of the blue light according to the original color coordinates and the original brightness of the red light, the green light and the blue light corresponding to the original color gamut and the target color coordinates and the third brightness of the blue light;
and obtaining target brightness gains of the red light, the green light and the blue light according to the target color coordinates and the target maximum brightness of the red light, the green light and the blue light and the target color coordinates and the target brightness of the white light, wherein the target brightness of the white light is the same as the original brightness of the white light corresponding to the original color gamut.
18. The display system according to claim 1, wherein when the target display mode is one of the modes, the obtaining the target parameter according to the original color gamut of the light source light and the target color gamut corresponding to the target display mode includes:
obtaining target color coordinates of at least one of cyan light, magenta light and yellow light according to target color coordinates and target brightness of at least two of red light, green light and blue light;
And determining that the target brightness gain of at least one of the cyan light, the magenta light and the yellow light is N, and the value range of N is 0-2.
19. The display system according to claim 1, wherein when the target display mode is mode two, the obtaining the target parameter according to the original color gamut of the light source light and the target color gamut corresponding to the target display mode includes at least one of:
obtaining target color coordinates of magenta light according to target color coordinates and target brightness of red light and blue light;
obtaining a target color coordinate of yellow light according to the target color coordinates and target brightness of red light and green light and the original color coordinates and original brightness of first mixed light, wherein the first mixed light is obtained when a light source generating red light and a light source generating green light are simultaneously lightened;
and obtaining the target color coordinates of the cyan light according to the target color coordinates and the target brightness of the green light and the blue light and the original color coordinates and the original brightness of the second mixed light, wherein the second mixed light is the mixed light obtained when the light source generating the green light and the light source generating the blue light are simultaneously lightened.
20. A display control method applied to a display system including a light source device for generating light source light, the method comprising:
Controlling a light source device to generate light source light, wherein the light source light at least comprises first light, second light and third light, the first light is light with a narrow spectrum, the second light is light with a wide spectrum, the third light comprises light with a narrow spectrum or a wide spectrum, the first light and the second light are the same in color, or the spectrum of the second light at least comprises the spectrum of the first light;
a color gamut control process and/or a timing control process, wherein,
the color gamut control process includes:
obtaining target parameters according to the original color gamut of the light source light and the target color gamut corresponding to the target display mode, wherein the target parameters comprise target color coordinates and target brightness gains of red light, green light, blue light and white light, or comprise target color coordinates and target brightness gains of red light, green light, blue light and white light and target color coordinates and target brightness gains of at least one of cyan light, magenta light and yellow light;
controlling a light modulation device according to original parameters and the target parameters, wherein the original parameters comprise original color coordinates and original brightness proportions of red light, green light, blue light and white light corresponding to the original color gamut;
The timing control process includes:
determining a target display mode, wherein the target display mode comprises a mode one or a mode two;
when the target display mode is determined to be mode one, controlling the output time of the first light and the output time of the second light to be consistent, wherein the output time of the third light is not overlapped with the output time of the first light; when the target display mode is determined to be a mode two, controlling the output time of the first light to be greater than or less than or equal to the output time of the second light, wherein the output time of the first light at least partially overlaps with the output time of the second light, and the output time of the third light at least partially overlaps with the output time of the first light;
the third light comprises a first sub light and a second sub light, the first sub light is light with a narrow spectrum or a wide spectrum, the second sub light is light with a narrow spectrum or a wide spectrum, and the colors of the first sub light and the second sub light are different;
when the target display mode is determined to be mode one, controlling the output time of the first sub light and the output time of the second sub light not to overlap; when the target display mode is determined to be a mode two, controlling output time of at least two of the first light, the first sub light and the second sub light to be at least partially overlapped.
21. The display control method according to claim 20, wherein the light source light further includes fourth light, the fourth light is light of a broad spectrum, the fourth light and the first sub-light are the same color, or a spectrum of the fourth light includes at least a spectrum of the first sub-light;
when the target display mode is determined to be mode one, controlling the output time of the first sub light to be consistent with the output time of the fourth light; when the target display mode is determined to be a mode two, controlling the output time of the first sub light to be greater than or less than or equal to the output time of the fourth light, wherein the output time of the first sub light and the output time of the fourth light are at least partially overlapped.
22. The display control method according to claim 21, wherein the light source light further includes a fifth light, the fifth light being light of a narrow spectrum or a wide spectrum, the fifth light being the same color as the second sub light;
when the target display mode is determined to be mode one, controlling the output time of the fifth light to be within the output time of the second sub light; when the target display mode is determined to be mode two, controlling the output time of the fifth light to be within the output time of at least one of the first light, the second light, the first sub-light, the second sub-light and the fourth light.
23. The display control method according to claim 20, wherein the timing control process further comprises:
controlling at least one of all light sources of the light source device to have lighting time distributed in a first sub-period and a second sub-period within one lighting period, wherein the lighting time distributed in the first sub-period and the second sub-period is discontinuous, and each lighting period comprises the first sub-period and the second sub-period;
the lighting time of all the light sources in two adjacent lighting periods is controlled to be discontinuous.
24. The display control method according to claim 20, wherein the timing control process further comprises:
and controlling the duration of each lighting time of all the light sources of the light source device to be more than or equal to 9% of the duration of one lighting period.
25. The display control method according to claim 20, wherein obtaining the target parameter according to the original color gamut of the light source light and the target color gamut corresponding to the target display mode comprises:
the target color coordinates of the white light and the original color coordinates are kept consistent, and the target luminance gain of the white light is determined to be 1.
26. The display control method according to claim 20, wherein obtaining the target parameter according to the original color gamut of the light source light and the target color gamut corresponding to the target display mode comprises:
Determining target color coordinates of red light, green light and blue light according to an intersection of the original color gamut and the target color gamut, wherein the target color coordinates of the red light are coordinates corresponding to a point with the maximum x value in the intersection; the target color coordinates of the green light are coordinates corresponding to the point with the largest y value in the intersection; the target color coordinates of the blue light are coordinates corresponding to a point in the intersection where the sum of the x value and the y value is minimum.
27. The display control method according to claim 20, wherein obtaining the target parameter according to the original color gamut of the light source light and the target color gamut corresponding to the target display mode further comprises:
obtaining the target maximum brightness of the red light according to the original color coordinates and the original brightness of the red light, the green light and the blue light corresponding to the original color gamut and the target color coordinates and the first brightness of the red light;
obtaining the target maximum brightness of the green light according to the original color coordinates and the original brightness of the red light, the green light and the blue light corresponding to the original color gamut and the target color coordinates and the second brightness of the green light;
obtaining the target maximum brightness of the blue light according to the original color coordinates and the original brightness of the red light, the green light and the blue light corresponding to the original color gamut and the target color coordinates and the third brightness of the blue light;
And obtaining target brightness gains of the red light, the green light and the blue light according to the target color coordinates and the target maximum brightness of the red light, the green light and the blue light and the target color coordinates and the target brightness of the white light, wherein the target brightness of the white light is the same as the original brightness of the white light corresponding to the original color gamut.
28. The display control method according to claim 20, wherein when the target display mode is one of the modes, the obtaining the target parameter according to the original color gamut of the light source light and the target color gamut corresponding to the target display mode includes:
obtaining target color coordinates of at least one of cyan light, magenta light and yellow light according to target color coordinates and target brightness of at least two of red light, green light and blue light;
and determining that the target brightness gain of at least one of the cyan light, the magenta light and the yellow light is N, and the value range of N is 0-2.
29. The display control method according to claim 20, wherein when the target display mode is mode two, the obtaining the target parameter according to the original color gamut of the light source light and the target color gamut corresponding to the target display mode includes at least one of:
Obtaining target color coordinates of magenta light according to target color coordinates and target brightness of red light and blue light;
obtaining a target color coordinate of yellow light according to the target color coordinates and target brightness of red light and green light and the original color coordinates and original brightness of first mixed light, wherein the first mixed light is obtained when a light source generating red light and a light source generating green light are simultaneously lightened;
and obtaining the target color coordinates of the cyan light according to the target color coordinates and the target brightness of the green light and the blue light and the original color coordinates and the original brightness of the second mixed light, wherein the second mixed light is the mixed light obtained when the light source generating the green light and the light source generating the blue light are simultaneously lightened.
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