CN110505460B - Display device - Google Patents
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- CN110505460B CN110505460B CN201810475690.4A CN201810475690A CN110505460B CN 110505460 B CN110505460 B CN 110505460B CN 201810475690 A CN201810475690 A CN 201810475690A CN 110505460 B CN110505460 B CN 110505460B
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
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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]
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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]
- H04N9/3141—Constructional details thereof
- H04N9/315—Modulator illumination systems
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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
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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
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Abstract
A display apparatus includes a controller, a light source driver, a light source device, and a light modulation device. The light source device comprises an excitation light source, a wavelength conversion device and a compensation light source, and the light modulation device comprises a first spatial light modulator and a second spatial light modulator. The controller is used for sending a driving signal to the light source driver and sending an image signal to the light modulation device. The excitation light source emits a first color light, the wavelength conversion device generates a second color light and a third color light, and the light source driver controls the compensation light source to emit at least one of a first compensation light and a second compensation light. The first spatial light modulator modulates the first color light and the at least one compensation light to generate image light in a first time period and modulates the second color light in a second time period, and the second spatial light modulator modulates the at least one compensation light in the first time period and modulates the third color light in the second time period.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display device, such as a projection display device.
Background
Currently, Spatial Light Modulators (SLM), which generally include LCD, LCOS, DMD, etc., are widely used in the field of projection display. The spatial light modulators are classified into monolithic, two-chip, and three-chip 3-system systems. In a two-chip system, there is both temporal and spatial light splitting. The light source provides time sequence light of blue laser and yellow fluorescence (B + Y), the first time sequence light source provides blue light illumination light, one spatial light modulator modulates the blue light image, the second time sequence light source provides yellow light illumination light, the two spatial light modulators are respectively irradiated by the red light illumination light and the green light illumination light which are divided by the optical machine, and the red light image and the green light image are simultaneously modulated. Two-piece systems can efficiently utilize yellow illumination, but can have problems: the broad spectrum of yellow light is divided into red and green light, and the primary colors are divided into lower brightness or color purity, for example, to obtain red light with better color purity, the light of the orange segment is largely divided into green light, the brightness of the red light is lower, and the color purity of the green light is correspondingly reduced.
Specifically, as shown in fig. 1, in a display device, a light source provides sequential blue light and yellow light, and the split light at a beam splitter plate illuminates two spatial light modulators (SLM1 and SLM2), respectively, and the spatial light modulators (SLM1 and SLM2) receive image signals to modulate the light, so as to generate modulated light, and the modulated light is combined at the beam splitter plate, and finally a color image is projected through a lens. Wherein, the optical lens can be a Green-pass coating or a Red-pass coating.
As shown in FIG. 2, in the first time sequence, the light source provides blue light illumination light and illuminates the spatial light modulator SLM-1 to generate a blue light image; in the second time sequence, the light source provides yellow illumination light, which is divided into red light and green light by the beam splitter plate to respectively illuminate the spatial light modulator SLM-1 and the spatial light modulator SLM-2, so as to respectively generate a red light image and a green light image, as can be seen from FIG. 2, the spatial light modulator SLM-2 is idle in the first time sequence, and the light energy is not maximally utilized.
In addition, as shown in fig. 3, since red light and green light are obtained by splitting yellow light, the yellow light is generally generated by exciting a yellow phosphor with blue light excitation light, and the spectrum is broad. Therefore, the brightness and the color purity of the two primary color lights are mutually influenced, and finally, in order to match a white light coordinate which accords with human vision, light splitting is carried out according to the brightness ratio of the red light and the green light, so that the color purity of the obtained red light and the green light is not high, and the color gamut of an image displayed by the display equipment is narrow.
Disclosure of Invention
In view of the above, the present invention provides a display device that can realize a wider color gamut.
A display device comprises a controller, a light source driver, a light source device and a light modulation device, wherein the light source device comprises an excitation light source, a wavelength conversion device and a compensation light source, the light modulation device comprises a first spatial light modulator and a second spatial light modulator, the controller is used for sending a driving signal to the light source driver and sending an image signal of an image to the light modulation device, the light source driver receives the driving signal sent by the controller to control the excitation light source to send excitation light and control the compensation light source to send first compensation light and second compensation light, the excitation light is first color light, the first compensation light and the second compensation light are used for expanding the color gamut of the display device, the wavelength conversion device is used for receiving a part of the excitation light to generate the second color light and a third color light, the image signal of the image comprises a first color image signal, a second color image signal and a third color image signal of each pixel, the first spatial light modulator is used for modulating at least one of the first color light and the first compensation light and the second compensation light according to the first color image signal in a first time period in a modulation period of one image to generate image light and modulating the second color light according to the second color image signal in a second time period in the modulation period of the image to generate image light, and the second spatial light modulator is used for modulating at least one of the first compensation light and the second compensation light in the first time period to generate image light and modulating the third color light according to the third color image signal in the second time period to generate image light.
Compared with the prior art, the display equipment has the advantages that the compensation light source is added to emit the compensation light on the basis of the exciting light and the excited light, so that the brightness of the light source device is increased, the color gamut of the light emitted by the light source device can be expanded, and the color gamut of the image finally displayed by the display equipment is wider. In addition, the first spatial light modulator and the second spatial light modulator perform image modulation in two time periods, so that the utilization rate of the light modulation device is improved, and light emitted by the light source device is utilized to the maximum.
Drawings
Fig. 1 is a schematic configuration diagram of a display device.
Fig. 2 is a schematic diagram of image modulation timing sequences of two spatial light modulators of the display apparatus shown in fig. 1.
Fig. 3 is a schematic diagram of a spectrum of light emitted from a light source of the display device shown in fig. 1.
Fig. 4 is a schematic configuration diagram of a display device according to a first embodiment of the present invention.
Fig. 5 is a schematic view of a wavelength conversion device of the display apparatus shown in fig. 4.
Fig. 6 is a schematic diagram of the gamut range of the display device shown in fig. 4.
FIG. 7 is a diagram illustrating a light source control timing and an image modulation timing of the display apparatus shown in FIG. 4.
Fig. 8 is a schematic diagram of a light source control timing and an image modulation timing of a display device according to a second embodiment of the present invention.
Fig. 9 is a schematic view of a light source control timing of a display device according to a third embodiment of the present invention.
Fig. 10 is a timing chart illustrating light source control of a display device according to a third embodiment of the present invention and a modification thereof.
Fig. 11 is a diagram illustrating an image modulation timing of a display device according to a fourth embodiment of the present invention.
Fig. 12 is a schematic diagram of an image modulation timing of a display device according to a modified embodiment of the fifth embodiment of the present invention.
Fig. 13 is a schematic diagram of the corrected image signal generation and processing of the display device according to the fifth embodiment of the present invention.
Description of the main elements
Compensating light source 133
First spatial light modulator 141
Second spatial light modulator 142
First gamut F1
Second gamut F2
Partial color gamut range P
First color light B
Excited light Y
The second color light R1
Third color light G1
First compensation light R2
Second compensating light G2
First color image signal B0
Second color image signal R0
Third color image signal G0
The following detailed description will further illustrate the invention in conjunction with the above-described figures.
Detailed Description
Referring to fig. 4, fig. 4 is a schematic structural diagram of a display device according to a first embodiment of the present invention. In this embodiment, the display apparatus 100 is a projection display apparatus, and the display apparatus 100 includes a controller 110, a light source driver 120, a light source device 130, and a light modulation device 140. The controller 110 is configured to send a driving signal to the light source driver 120 to control the light source device 130 to emit light through the light source driver 120, and the controller 110 is further configured to send an image signal of an image to the light modulation device 140, so that the light modulation device 140 modulates the light emitted by the light source device 130 according to the image signal of the image to generate image light.
Specifically, the light source device 130 includes an excitation light source 131, a wavelength conversion device 132, and a compensation light source 133. The excitation light source 131 is used for emitting excitation light, and the wavelength conversion device 132 is used for receiving the excitation light and converting the excitation light into stimulated light. In this embodiment, the excitation light source 131 is a laser light source, such as a blue laser light source, and the excitation light is the first color light B, i.e., a blue laser. The wavelength conversion device 132 has a wavelength conversion material (e.g., a yellow fluorescent material) for generating yellow fluorescent light as the excited light Y, and it is understood that the excited light Y is a mixed light of the second color light R1 and the third color light G1, specifically, the second color light R1 is red light (i.e., red fluorescent light) in the yellow fluorescent light, and the third color light G1 is green light (i.e., green fluorescent light) in the yellow fluorescent light.
Referring to fig. 5, fig. 5 is a schematic diagram of the wavelength conversion device 132 of the display apparatus 100 shown in fig. 4. The wavelength conversion device 132 may be a color wheel, and includes a first segment region 132a and a second segment region 132B sequentially arranged along a circumferential direction, the first segment region 132a may be provided with a scattering material for receiving the excitation light and scattering the excitation light to emit the first color light B, and the second segment region 132B may be provided with a wavelength conversion material for receiving the excitation light and generating the excited light. It can be understood that the excitation light source 131 and the wavelength conversion device 132 form a B + Y light source for emitting a first color light B and an excited light Y, wherein the excited light Y includes a second color light R1 and a third color light G1. It is understood that the light source device 130 may further include a light splitting element for splitting the received laser light into the second color light R1 and the third color light G1.
The compensation light source 133 is configured to emit at least one of the first compensation light R2 and the second compensation light G2, and it can be understood that the first compensation light R2 and the second compensation light G2 are configured to expand the color gamut of the display device. Specifically, the first compensation light R2 has the same color as the second color light R1 of the laser beam Y and a color purity greater than the second color light R1 of the laser beam Y, and the second compensation light G2 has the same color as the third color light G1 of the laser beam Y and a color purity greater than the third color light G1 of the laser beam Y. In this embodiment, the first compensation light R2 and the second compensation light G2 are both laser lights, such as red laser light and green laser light, and the compensation light source 133 includes a laser light source 134 for emitting red laser light and a laser light source 135 for emitting green laser light. It is to be understood that, in the modified embodiment, the second color light may be green fluorescence, the third color light may be red fluorescence, and the first compensation light and the second compensation light may be green laser light and red laser light, respectively, corresponding to each other.
Referring to fig. 6, fig. 6 is a schematic view of a color gamut of the display device 100 shown in fig. 4 (i.e., a color gamut of the light emitted by the light source device 130). Specifically, the color gamut of the light emitted from the light source device 130, which is a mixture of the first, second, and third color lights B, R1, G1, is the first color gamut F1, the color gamut of the mixture of the first color light B and the first and second compensation lights R2, G2 is the second color gamut F2, and the second color gamut F2 includes the first color gamut F1 and includes the partial color gamut P outside the first color gamut. The color gamut of the mixture of the first, second and third color lights B, R1, G1 and the first and second compensation lights is a third color gamut F3, and the third color gamut F3 is any color gamut between the first color gamut F1 and the second color gamut F2. It is understood that the first color gamut F1, the second color gamut F2 and the third color gamut F3 are all triangular regions, and three vertexes of the same color of the first, second and third color gamuts F1, F2 and F3 are on the same straight line, for example, three green vertexes (g1, g2 and g3) of the first, second and third color gamuts F1, F2 and F3 are on the same straight line, and the color gamut of the light emitted from the light source device 130 can be dynamically changed within the first color gamut F1, the second color gamut F2 and the third color gamut F3 by controlling the light source driver 120 to control the mixing ratio of the first, second and third color lights emitted from the light source device 130 and the first and second compensating lights. Wherein, the first gamut range may be a DCI gamut range, such as DCI-P3; the second color gamut range F2 may be an REC color gamut range, such as color gamut range rec.2020.
It is understood that the controller 110 is configured to receive the original image data of the image from the signal source, determine the color gamut of the image according to the original image data of the image, output the driving signal to the light source driver 120 according to the color gamut of the image, and output the image signal of the image to the light modulation device 140, so that the light source driver 120 controls the ratio and timing of the first, second, and third color lights B, R1, G1 and the first and second compensation lights R2, G2 emitted from the light source device 130, and control the light modulation device 140 to perform image modulation according to the image signal of the image and the corresponding modulation timing to generate image light consistent with the brightness and color gamut of the original image data of the image. Specifically, it can be understood that the color gamut of the light emitted from the light source device 130 can be changed along with the change of the color gamut of the image by controlling the light mixing ratio of the first, second and third color lights B, R1, G1 and the first and second compensation lights R2, G2 by the light source driver 120, and the color gamut of the image light output from the light modulation device 140 can be changed along with the change of the color gamut of the image, so that the display device 100 realizes a dynamic color gamut.
In this embodiment, the light modulation device 140 includes a first spatial light modulator 141 and a second spatial light modulator 142, wherein the first spatial light modulator 141 and the second spatial light modulator 142 may be both DMD spatial light modulators. The first spatial light modulator 141 is configured to modulate the first color light according to the first color image signal to generate image light and modulate the second color light according to the second color image signal to generate image light, and the second spatial light modulator 142 is configured to modulate at least one of the first compensation light and the second compensation light according to one of the first color image signal, the second color image signal and the third color image signal to generate image light and modulate the third color light according to the third color image signal to generate image light.
Referring to fig. 7, fig. 7 is a schematic diagram illustrating a light source control timing and an image modulation timing of the display apparatus 100 shown in fig. 4. The modulation time of the image comprises a first time period and a second time period. The image signal of the image comprises a first color image signal B of each pixel0A second color image signal R0And a third color image signal G0。
In the first period, the light source driver 120 receives the driving signal from the controller 110 to control the excitation light source 131 to emit the excitation light, which is the first color light B, and the excitation light is guided to the first spatial light modulator 141.
In the second time period, the light source driver 120 receives the driving signal emitted by the controller 110 to control the excitation light source 131 to emit excitation light, the wavelength conversion device 132 converts the excitation light into stimulated light Y, the stimulated light Y includes the second color light R1 and the third color light G1, the second color light R1 is guided to the first spatial light modulator 141, and the third color light G1 is guided to the second spatial light modulator 142.
Further, in the first and second periods, the light source driver 120 controls the compensation light source 133 to emit at least one of the first compensation light R2 and the second compensation light G2 according to the driving signal, the first compensation light R2 and the second color light R1 have the same color and have a color purity greater than that of the second color light R1, the second compensation light G2 and the third color light G1 have the same color and have a color purity greater than that of the third color light G1, and at least one of the first compensation light R2 and the second compensation light G2 is guided to the light modulation device 140. The light source driver 110 can control the intensities of the first compensation light R2 and the second compensation light G2 emitted by the compensation light source 133 according to the color gamut of the original image data of the image.
Specifically, in the present embodiment, the first spatial light modulator 141 receives the first color light B and the first compensation light R2 during the first period of time, so the first spatial light modulator 141 is based on the first color image signal B during the first period of time0The first color light B and the first compensation light R2 are modulated to generate image light, and the second spatial light modulator 142 receives the second compensation light G2 during a first time period, so that the second spatial light modulator 142 generates image light according to the first color image signal B during the first time period0The second compensation light G2 is modulated to generate image light.
The first spatial light modulator 141 receives the second color light R1 and the first compensation light R2 during the second time period, so that the first spatial light modulator 141 is according to the second color image signal R during the second time period0The second spatial light modulator 142 receives the third color light G1 and the second compensation light G2 during a second time period, so that the second spatial light modulator 142 generates image light according to the third color image signal G during the second time period0The third color light G1 and the second compensation light G2 are modulated to generate image light.
Compared with the prior art, in the display device 100 of the present invention, the compensation light source 133 is added to emit the compensation light on the basis of the excitation light and the stimulated light, which not only ensures to increase the brightness of the second color light (including the second color light R1 and the first compensation light R2) and the third color light (including the third color light G1 and the second compensation light G2) emitted by the light source device 130, but also expands the color gamut of the light emitted by the light source device 130 because the color purity of the compensation light is greater than that of the stimulated light, thereby widening the color gamut of the image finally displayed by the display device 100. In addition, the first and second spatial light modulators 141 and 142 perform image modulation in two time periods, which improves the utilization rate of the light modulation device 140, and maximizes the utilization of the light emitted from the light source device 130.
Please refer to fig. 8, whichFig. 8 is a schematic diagram of a light source control timing and an image modulation timing of the display device according to the second embodiment of the present invention. The display device of the second embodiment is substantially the same as the display device of the first embodiment, that is, the above description of the display device of the first embodiment can be substantially applied to the display device of the second embodiment, and the difference therebetween is mainly: in the second embodiment, the light source driver controls the intensity of the first compensation light R2 emitted from the compensation light source and the intensity of the second compensation light G2 emitted from the compensation light source to be constant (e.g., maximum) in the first time period according to the color gamut of the original image data of the image, and the second spatial light modulator modulates at least one of the first compensation light and the second compensation light (e.g., the second compensation light) according to the correction image signal calculated according to at least one of the first color image signal, the second color image signal and the third color image signal to generate the G2 image light, wherein the correction image signal is the first color image signal B0A is a constant which is greater than or equal to 0 and less than or equal to 1, or a can be a constant operator, and it can be understood that the value of a can be determined according to the original image data brightness or color gamut range of the image.
Although the intensity of the compensation light source that emits the second compensation light G2 is constant in the second embodiment, the same technical effect as in the first embodiment can be achieved by calculating the correction image signal to be input to the second spatial light modulator 142 by the constant operator a.
Fig. 9 is a schematic view of a light source control timing of a display device according to a third embodiment of the present invention. The display device of the third embodiment is substantially the same as the display device of the first embodiment, that is, the above description of the display device of the first embodiment can be substantially applied to the display device of the third embodiment, and the difference therebetween is mainly: in a third embodiment, the light source driver controls the excitation light source to emit excitation light with an intensity greater during the first time period than during the second time period. Specifically, the drive current of the excitation light source may be controlled to be larger in the first period than in the second period.
In the first and second embodiments, the second color light finally emitted by the display device is improved in color purity and brightness by adding the first and second compensation lights R2 and G2, but the brightness of the first color light B is not improved, so that in the third embodiment, the first color light B can be compensated by increasing the light intensity of the first color light B in the first period of time, thereby achieving the effect of improving the brightness of the first color light B.
In addition, as shown in fig. 10, in a modified embodiment of the third embodiment, the first color light B may be compensated by increasing the duty ratio of the excitation light in the first period (i.e., the ratio of the first color light B in the light emitted from the B + Y light source), so that the luminance of the first color light B is improved. In this modified embodiment, the light intensity of the excitation light source 131 in the first period and the second period may be the same, but in the case where the modulation time of one image is unchanged, the first period may be longer than that in the third embodiment, and accordingly, the second period may be shorter than that in the third embodiment, and specifically, the length of the first segment region of the wavelength conversion device of the display apparatus may be longer and the length of the second segment region may be correspondingly reduced. In addition, due to the variation of the first time period and the second time period, the gray scale value of the image signal of each color needs to be adjusted accordingly, i.e. the two spatial light modulators (especially digital modulators such as DMD) realize each gray scale of 8bit or other bits within the new duty ratio.
It is understood that the third embodiment mainly compensates the first color light B emitted by the light source device by means of amplitude modulation, and the modified embodiment of the third embodiment mainly compensates the first color light B emitted by the light source device by means of frequency modulation, which can achieve substantially the same technical effects.
Fig. 11 is a diagram illustrating a light source control timing and an image modulation timing of a display device according to a fourth embodiment of the present invention. The display device of the fourth embodiment is substantially the same as that of the second embodiment, that is, the above-described pair of the second embodimentThe description of the display device of the embodiment can be basically applied to the display device of the fourth embodiment, and the difference between them is mainly that: in the fourth embodiment, the second spatial light modulator modulates the second compensation light G2 to generate image light according to the corrected image signal f (h) in the first period of time, and the corrected image signal f (h) can be according to the first color image signal B0A second color image signal R0And a third color image signal G0In this embodiment, a is a constant which is 0 or more and 1 or less, B is a constant which is 0 or more and 1-a or less, and f (B) and f (g) represent the first color image signal B, respectively0And a third color image signal G0。
In the fourth embodiment, the intensity of the second compensation light G2 emitted by the compensation light source may be constant (e.g. at a maximum value), and the second spatial light modulator modulates the second compensation light G2 according to the corrected image signal calculated by the image operator H, so that the second spatial light modulator can be used to modify the first color light B (blue primary) on the one hand and compensate the brightness and color purity of the third color light G1 on the other hand.
Since the second spatial light modulator performs compensation of the second compensation light G2 in both periods, it is possible to increase the brightness of an image or to maintain the same brightness while reducing the number of compensation light sources used, thereby reducing the cost.
Further, in the algorithm for correcting the image signal, the second spatial light modulator input signal of the first time period includes both the modified signal of the first color light B and the signal of the third color image, and the signal cannot overflow the gray scale, and the embodiment specifically employs some linear operators to implement the image signal calculation, such as on the basis of the constant operator a in the second embodiment, another constant operator B is introduced while accessing the third color image signal, so that a new image signal f (h) ═ a (B) + B f (g) finally input to the second spatial light modulator, where B >0 and B ≦ 1-a, and the second spatial light modulator is maximally utilized in the first time period when B ═ 1-a.
In summary, in view of reducing the number of compensation light sources for supplying the second compensation light G2 to the second spatial light modulator to maintain the image brightness and reducing the cost, according to the above-described image algorithm H, in the case where the second spatial light modulator does not contribute to the brightness of the second period thereof in the first period, the number of compensation light sources G2 may be reduced to 1/(1+ b) as it is.
Fig. 12 is a schematic diagram of a light source control timing and an image modulation timing of a display device according to a fourth embodiment of the present invention. The display apparatus of the fifth embodiment is substantially the same as the display apparatus of the fourth embodiment, that is, the above description of the display apparatus of the fourth embodiment can be basically applied to the display apparatus of the fifth embodiment, and the difference therebetween is mainly: the second spatial light modulator is further configured to modulate the second compensation light G2 to generate image light according to a correction image signal f (L) during a first time period, wherein the correction image signal f (L) can be according to the first color image signal B0A second color image signal R0And a third color image signal G0In the present embodiment, the corrected image signal f (l) is a constant equal to or greater than 0 and equal to or less than 1, and is an image signal of n bits, and b (2) is (l)n-1)/Gmax-a Bmax/Gmax, f (B) and f (g) respectively represent the first color image signal B0And a third color image signal G0Bmax is the first color image signal B of each pixel in the image data0Max { f (B) }, Gmax is the third color image signal G of each pixel in the image data0Max { f (g) }.
Specifically, as shown in fig. 13, the step of generating and processing the corrected image signal f (l) may include:
receiving a first color image signal B of each pixel of the image0And a third color image signal G0；
Acquiring a first color image signal B of each pixel in the image data0Maximum value Bmax of the image data and third color image signal G of each pixel in the image data0Maximum value Gmax of (1);
according to the formula b ═ b &2n-1)/Gmax-a Bmax/Gmax calculating the b value;
calculating a corrected image signal f (l) using the formula f (l) ═ a (b) + b ═ f (g);
the corrected image signal f (l) is provided to the second spatial light modulator.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A display device characterized by: the display equipment comprises a controller, a light source driver, a light source device and a light modulation device, wherein the light source device comprises an excitation light source, a wavelength conversion device and a compensation light source, and the light modulation device comprises a first spatial light modulator and a second spatial light modulator;
the controller is used for sending a driving signal to the light source driver and sending an image signal of an image to the light modulation device;
the light source driver receives a driving signal sent by the controller to control the excitation light source to send out excitation light and control the compensation light source to send out first compensation light and second compensation light, wherein the excitation light is first color light, and the first compensation light and the second compensation light are used for expanding the color gamut range of the display equipment;
the wavelength conversion device is used for receiving a part of the exciting light to generate a second color light and a third color light, and the second color light and the third color light are different in color; the image signal of the image comprises a first color image signal, a second color image signal and a third color image signal of each pixel; the first compensation light is the same color as the second color light, and the second compensation light is the same color as the third color light;
the first spatial light modulator is used for modulating the first color light and one of the first compensation light and the second compensation light according to the first color image signal in a first time period in a modulation period of one image to generate image light and modulating the second color light according to the second color image signal in a second time period in the modulation period of the one image to generate image light;
the second spatial light modulator is configured to modulate the other of the first compensation light and the second compensation light according to a correction image signal or one of the first color image signal, the second color image signal and the third color image signal during the first time period to generate image light, and modulate the third color light according to the third color image signal during the second time period to generate image light, wherein the correction image signal is calculated according to at least one of the first color image signal, the second color image signal and the third color image signal.
2. The display device of claim 1, wherein: in the first time period, the first spatial light modulator modulates the first color light and the first compensation light to generate image light, and the second spatial light modulator modulates the second compensation light to generate image light.
3. The display device of claim 2, wherein: the first compensation light has a color purity greater than the second color light, and the second compensation light has a color purity greater than the third color light.
4. The display device of claim 2, wherein: the first spatial light modulator further receives the first compensation light in the second time period, and the first spatial light modulator further modulates the second color light and the first compensation light according to the second color image signal in the second time period to generate image light, the second spatial light modulator further receives the second compensation light in the second time period, and the second spatial light modulator is further configured to modulate the third color light and the second compensation light according to the third color image signal in the second time period to generate image light.
5. The display device according to any one of claims 1 to 4, wherein: and controlling the proportion and the time sequence of the first, second and third color lights emitted by the light source device and the first and second compensation lights through the light source driver, and controlling the light modulation device to perform image modulation according to the image signal and the time sequence so as to generate image lights consistent with the brightness and the color gamut range of the image.
6. The display device of claim 2, wherein: the first spatial light modulator is further configured to receive the first compensation light in the second time period, and the first spatial light modulator is further configured to modulate the first color light and the first compensation light according to the first color image signal in the first time period to generate image light, the second spatial light modulator is further configured to receive the second compensation light in the second time period, and the second spatial light modulator is further configured to modulate the second compensation light according to the correction image signal in the first time period to generate image light, the correction image signal is a time of the first color image signal, and a is a constant greater than or equal to 0 and less than or equal to 1.
7. The display device of claim 2, wherein: the light source driver is also used for receiving the driving signal sent by the controller to control the excitation light sent by the excitation light source, so that the intensity of the excitation light sent by the excitation light source in the first time period is greater than that in the second time period.
8. The display device of claim 2, wherein: the first spatial light modulator is further configured to receive the first compensation light during the second time period, and the first spatial light modulator is further configured to modulate the first color light and the first compensation light according to the first color image signal during the first time period to generate image light, and the second spatial light modulator is further configured to receive the second compensation light during the second time period, and the second spatial light modulator is further configured to modulate the second compensation light in accordance with the corrected image signal f (h) to generate image light during the first period of time, the corrected image signal f (h) ═ a f (b) + b f (g), wherein a is a constant greater than or equal to 0 and less than or equal to 1, b is a constant greater than 0 and less than or equal to 1-a, and f (b) and f (g) represent the first color image signal and the third color image signal, respectively.
9. The display device of claim 2, wherein: the first spatial light modulator further receives the first compensation light in the second time period, and the first spatial light modulator is further configured to modulate the first color light and the first compensation light to generate image light in the first time period according to the first color image signal, the second spatial light modulator further receives the second compensation light in the second time period, and the second spatial light modulator is further configured to modulate the second compensation light to generate image light in the first time period according to the correction image signal f (l), where a is a constant greater than or equal to 0 and less than or equal to 1, and b is (2 bit, and a) is a constant greater than or equal to 0 and less than or equal to 1, and b is a constant (2 bit)n-1)/Gmax-a Bmax/Gmax, f (b) and f (g) respectively represent the first color image signal and the third color image signal, Bmax is a maximum value max { f (b) } in the first color image signal of each pixel in the image data, and Gmax is a maximum value max { f (g) } in the third color image signal of each pixel in the image data.
10. The display device of claim 1, wherein: the excitation light source is a blue laser light source, the first color light is blue laser, the second color light is one of red fluorescence and green fluorescence, the third color light is the other of red fluorescence and green fluorescence, the compensation light source comprises a laser light source, the first compensation light is one of red laser and green laser, the color of which is the same as that of the second color light, and the second compensation light is one of red laser and green laser, the color of which is the same as that of the third color light.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810475690.4A CN110505460B (en) | 2018-05-17 | 2018-05-17 | Display device |
| PCT/CN2019/070544 WO2019218705A1 (en) | 2018-05-17 | 2019-01-05 | Display apparatus |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810475690.4A CN110505460B (en) | 2018-05-17 | 2018-05-17 | Display device |
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| CN110505460B true CN110505460B (en) | 2021-11-30 |
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| CN201810475690.4A Active CN110505460B (en) | 2018-05-17 | 2018-05-17 | Display device |
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| CN (1) | CN110505460B (en) |
| WO (1) | WO2019218705A1 (en) |
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| CN113960864A (en) * | 2020-07-21 | 2022-01-21 | 深圳光峰科技股份有限公司 | Projection system |
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| WO2019218705A1 (en) | 2019-11-21 |
| CN110505460A (en) | 2019-11-26 |
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