Multi-primary color display device and display control method

Abstract

Disclosed are a multi-primary color display device and a display control method. Each pixel unit of the multi-primary color display device comprises a first sub-pixel for providing a first primary color, a second sub-pixel for providing a second primary color, a third sub-pixel for providing a third primary color, a fourth sub-pixel for providing a fourth primary color, and a fifth sub-pixel for providing a fifth primary color. The display state of the multi-primary color display device comprises a first display state and a second display state. The first display state comprises that each pixel unit displays by using the first primary color, the second primary color, the third primary color and the fourth primary color. The second display state comprises that each pixel unit displays by using the first primary color, the second primary color, the third primary color and the fifth primary color. By calling different primary colors in each pixel unit to display images in different display states, the adjustment range between the primary colors can be effectively reduced, so that the energy use efficiency of the display device is improved, and the power consumption is reduced.

Description

Technical Field

[0001] This invention relates to the field of display technology, and in particular to a multi-color display device and display control method. Background Technology

[0002] With the rapid development of display technology, people's demands for image quality are also increasing. The traditional three-primary-color system limits the reproduced colors to a triangular color gamut composed of the three primary colors, which can no longer meet people's growing requirements for image quality. There are also four-primary-color display devices in the existing technology, but in the process of image display, both three-primary-color and four-primary-color display devices have the problem of low energy efficiency and high power consumption.

[0003] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is prior art. Summary of the Invention

[0004] The main objective of this invention is to provide a multi-color display device and a display control method, aiming to solve the technical problems of low energy efficiency and high power consumption in existing display devices.

[0005] To achieve the above objectives, the present invention provides a multi-primary-color display device, comprising:

[0006] Multiple pixel units, each pixel unit comprising: a first sub-pixel providing a first primary color, a second sub-pixel providing a second primary color, a third sub-pixel providing a third primary color, a fourth sub-pixel providing a fourth primary color, and a fifth sub-pixel providing a fifth primary color;

[0007] The display states of the multi-primary-color display device include a first display state and a second display state. The first display state includes each pixel unit displaying using its respective first primary color, second primary color, third primary color, and fourth primary color. The second display state includes each pixel unit displaying using its respective first primary color, second primary color, third primary color, and fifth primary color.

[0008] Optionally, the first primary color is red, the second primary color is green, the third primary color is blue, the fourth primary color is blue-violet, and the fifth primary color is yellow, yellow-green, or orange.

[0009] Optionally, the wavelength of the first primary color is in the range of 620 nm to 660 nm; and / or

[0010] The wavelength of the second primary color is between 528 nm and 536 nm; and / or

[0011] The wavelength of the third primary color is between 460nm and 468nm; and / or

[0012] The wavelength of the fourth primary color is between 427 and 440 nm; and / or

[0013] The wavelength of the fifth primary color is between 545nm and 600nm.

[0014] Optionally, the full width at half maximum (FWHM) of the first primary color is less than or equal to 85 nm; and / or

[0015] The full width at half maximum (FWHM) of the second primary color is less than or equal to 35 nm; and / or

[0016] The full width at half maximum (FWHM) of the third primary color is less than or equal to 31 nm; and / or

[0017] The full width at half maximum (FWHM) of the fourth primary color is less than or equal to 28 nm; and / or

[0018] The full width at half maximum (FWHM) of the fifth primary color is less than or equal to 44 nm.

[0019] Optionally, the display modes of the multi-color display device include a daytime mode and a nighttime mode. The multi-color display device displays in the daytime mode through the first display state, and the multi-color display device displays in the nighttime mode through the second display state.

[0020] Optionally, the display states of the multi-primary-color display device further include a third display state and a fourth display state. The third display state includes each pixel unit displaying using its respective first primary color, second primary color, and third primary color. The fourth display state includes each pixel unit displaying using its respective first primary color, second primary color, third primary color, fourth primary color, and fifth primary color.

[0021] Optionally, the multi-color display device displays in daytime mode through the third display state or the fourth display state.

[0022] Optionally, the type of the multi-color display device includes micro LED, mini LED, LCD, OLED, QLED, or laser projection display.

[0023] To achieve the above objectives, the present invention also proposes a display control method for a multi-primary-color display device: the multi-primary-color display device includes a plurality of pixel units, each pixel unit comprising: a first sub-pixel providing a first primary color, a second sub-pixel providing a second primary color, a third sub-pixel providing a third primary color, a fourth sub-pixel providing a fourth primary color, and a fifth sub-pixel providing a fifth primary color; the display control method includes:

[0024] Obtain the display mode of the multi-color display device, the display mode including day mode and night mode;

[0025] The display state of the multi-color display device is determined according to the display mode;

[0026] In the daytime mode, the multi-color display device displays through a first display state, which includes each pixel unit displaying through its respective first primary color, second primary color, third primary color, and fourth primary color.

[0027] The multi-color display device displays in the night mode through a second display state, the second display state including each pixel unit displaying through its respective first primary color, second primary color, third primary color and fifth primary color.

[0028] Optionally, when the display mode of the multi-color display device is switched from the daytime mode to the nighttime mode, each pixel unit uses its respective fifth primary color to replace the fourth primary color for display.

[0029] This invention discloses a multi-primary-color display device and a display control method. Each pixel unit of the multi-primary-color display device includes: a first sub-pixel providing a first primary color, a second sub-pixel providing a second primary color, a third sub-pixel providing a third primary color, a fourth sub-pixel providing a fourth primary color, and a fifth sub-pixel providing a fifth primary color. The display states of the multi-primary-color display device include a first display state and a second display state. The first display state includes each pixel unit displaying using its respective first primary color, second primary color, third primary color, and fourth primary color. The second display state includes each pixel unit displaying using its respective first primary color, second primary color, third primary color, and fifth primary color. In this invention, by calling different primary colors within each pixel unit for image display in different display states, the adjustment range between primary colors can be effectively reduced, thereby improving the energy efficiency of the display device and reducing power consumption. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0031] Figure 1This is a schematic diagram of the pixel unit structure of the multi-primary-color display device proposed in the embodiments of the invention;

[0032] Figure 2 This is a schematic diagram of the structure of each sub-pixel primary color within a pixel unit of the multi-primary color display device proposed in the embodiments of the invention;

[0033] Figure 3 This is a flowchart illustrating the first embodiment of the display control method for the multi-color display device of the present invention.

[0034] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0035] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0037] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0038] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, the user should consider such a combination of technical solutions to be non-existent and not within the scope of protection claimed by this invention.

[0039] Reference Figure 1 , Figure 1 This is a schematic diagram of the preset color architecture of the multi-primary-color display device proposed in the embodiments of the invention.

[0040] like Figure 1As shown, in this embodiment, the multi-primary-color display device includes multiple pixel units. Each pixel unit includes a first sub-pixel providing a first primary color, a second sub-pixel providing a second primary color, a third sub-pixel providing a third primary color, a fourth sub-pixel providing a fourth primary color, and a fifth sub-pixel providing a fifth primary color. The display states of the multi-primary-color display device include a first display state and a second display state. The first display state includes each pixel unit displaying using its respective first primary color, second primary color, third primary color, and fourth primary color. The second display state includes each pixel unit displaying using its respective first primary color, second primary color, third primary color, and fifth primary color.

[0041] It should be understood that multi-primary-color display devices can be of different types, such as micro LED, mini LED, LCD, OLED, QLED, or laser projection displays. Different display devices correspond to different types of pixel units. The specific type of pixel unit needs to be determined based on the specific type of display device. For example, in micro LED, mini LED, and other tiny LED display devices, different sub-pixels in a pixel unit can be LEDs providing different primary colors; in an LCD, different sub-pixels in a pixel unit are backlights providing different primary colors; in an OLED, different sub-pixels in a pixel unit are light-emitting materials providing different primary colors; and in a laser projection display, different sub-pixels in a pixel unit are laser sources providing different primary colors. In some embodiments of the present invention, in a multi-primary-color display device, the sub-pixel corresponding to the fifth primary color can be disposed between the sub-pixel corresponding to the first primary color and the sub-pixel corresponding to the second primary color.

[0042] It should be noted that in this embodiment, each pixel unit has five different sub-pixels to provide five different primary colors, specifically including red primary color, green primary color, blue primary color, blue-violet primary color, and a fifth primary color. The fifth primary color is set as a pre-defined hardware primary color, which can be any one of yellow primary color, yellow-green primary color, or orange primary color, and the emission wavelength of the fifth primary color is between 545nm and 600nm.

[0043] It is understandable that during image display, since the human eye's luminance spectral visual effect function is relatively high within the range of the fifth primary color (orange, yellow, and yellow-green), dynamically adjusting the fifth primary color for image display can achieve a certain degree of low power consumption and high brightness. For example, in LCD displays, yellow primary color subpixels can allow more red and green light to pass through, thus achieving a low power consumption and high brightness display effect.

[0044] When using a multi-color display device, it is necessary to first determine the current environmental state of the multi-color display device, determine the display mode to be used based on the current environmental state, further determine the corresponding display state, and then control the relevant sub-pixels to enter the working state under the determined display state. Different display states can be used in different scenarios to meet the display requirements of different scenarios and low power consumption.

[0045] In this embodiment, the display modes of the multi-color display device include a daytime mode and a nighttime mode. The multi-color display device displays in the daytime mode through the first display state, and the multi-color display device displays in the nighttime mode through the second display state.

[0046] It's important to note that daytime mode refers to a mode where the light intensity is within the normal range for daytime. Nighttime mode refers to a mode where the light intensity is within the normal range for nighttime. Daytime and nighttime modes should be determined based on the specific light intensity, not just the time of day. For example, it's unreasonable to assume the display is in nighttime mode in an environment with high-powered spotlights at night. To determine daytime and nighttime modes, a fixed light intensity reference value can be set. If the current light intensity is greater than the reference value, the display is considered to be in daytime mode; if the light intensity is less than the reference value, it is considered to be in nighttime mode.

[0047] It should be understood that, since each pixel unit in a multi-color display device has sub-pixels providing five primary colors, the multi-color display device can have multiple display states when displaying images using four primary colors. For example, when the external light intensity is high, the display device can display images using a first display state; while when the external light intensity is low, it can display images using a second display state. The required primary color combinations are different for different display states, therefore different sub-pixels are needed to provide the primary colors. In the first display state, in each pixel unit, the first sub-pixel provides the first primary color, the second sub-pixel provides the second primary color, the third sub-pixel provides the third primary color, and the fourth sub-pixel provides the fourth primary color. Display is achieved using the first to fourth primary colors, increasing display brightness while reducing the required output power consumption. Taking a Mini LED display device as an example, in outdoor locations with strong sunlight, the Mini LED display device provides high brightness by controlling the LEDs of the first to fourth primary colors in each pixel unit to display images. In nighttime environments, high brightness is not required, and the Mini LED display device can then display images in a second state. In this state, the LEDs of the first, second, third, and fifth primary colors in each pixel unit are controlled to operate normally.

[0048] In the actual display process, the display mode of the multi-primary-color display device can switch according to changes in the current light intensity. When the display mode changes, the corresponding display state should change accordingly. The specific process of changing the display state of the multi-primary-color display device can be as follows: first, turn off the current display state, then turn on the switched display state. That is, control the sub-pixels used for illumination in the current display state to stop emitting light, and then start the sub-pixels corresponding to the switched display state to enter the illumination state, thereby achieving the switching of the display state. Alternatively, in this embodiment, it is also possible to first determine the sub-pixels in the current display state that are in the illumination state and the sub-pixels that will emit light in the switched display state, keeping the state of the sub-pixels that are in the same state before and after the switch unchanged, and then switching the state of the sub-pixels whose state has changed, thereby achieving the switching of the display state. For example, when switching the multi-primary-color display device from the first display state to the second display state, the states of the sub-pixels corresponding to the first to third primary colors can be kept unchanged, and then the states of the sub-pixels corresponding to the fourth and fifth primary colors can be switched, thereby achieving the switching of the display state of the multi-primary-color display device.

[0049] It should be noted that in night mode, i.e., when the multi-primary-color display device is in its second display state, the circadian rhythm factor is a significant factor affecting the user's sleep quality. The specific values ​​of the circadian rhythm factor differ for different primary colors. Specifically, the circadian rhythm factor of the yellow-green primary color is lower than that of the yellow primary color, and the circadian rhythm factor of the yellow primary color is lower than that of the green primary color. Therefore, in night mode, replacing the green primary color with yellow or yellow-green primary colors can effectively reduce the impact on the user's sleep quality. Furthermore, replacing the green primary color with yellow-green primary colors can further improve the performance of the display device.

[0050] When a multi-color display device is in night mode, the circadian rhythm effect factor of green is higher than that of yellow-green for the same radiation intensity, which has a greater impact on users who are sleeping. Therefore, yellow-green can be used to replace green for image display based on the display output signal to reduce the circadian rhythm effect factor and more effectively reduce the impact of the display device on the user's sleep. In day mode, the display brightness parameter is obtained, and when the display brightness parameter is greater than a preset brightness parameter, yellow-green is used for image display to reduce power consumption and improve energy efficiency. Of course, when the display brightness parameter is less than the preset brightness parameter, there is no difference in power consumption between using green or yellow for image display, and green can be used directly in combination with other primary colors for image display.

[0051] In this embodiment, the display states of the multi-primary-color display device further include a third display state and a fourth display state. The third display state includes each pixel unit displaying using the first primary color, the second primary color, and the third primary color. The fourth display state includes each pixel unit displaying using the first primary color, the second primary color, the third primary color, the fourth primary color, and the fifth primary color.

[0052] The third display state utilizes the three primary colors (first to third primary colors) for display. The fourth display state utilizes all five primary colors simultaneously. The third display state is the commonly used three-primary-color display state, which will not be elaborated upon here. The fifth display state includes the use of a fifth primary color in combination with the first to fourth primary colors. Since the fifth primary color is any one of yellow, green, or orange, it has higher spectral visibility efficiency in daytime mode and lower circadian rhythm effect factor in nighttime mode. Therefore, displaying images by combining the fifth primary color with the first to fourth primary colors not only achieves low-power, high-brightness display effects in daytime mode but also reduces the impact on sleep quality in nighttime mode.

[0053] Furthermore, in daytime mode, the multi-color display device can display images not only through the first display state, but also through the third and fourth display states. The specific display state used can be determined based on the display power consumption and brightness. For example, if the multi-color display device has sufficient power, it can use the third display state to display images, while under conditions of insufficient power or energy saving, it can use the first or fourth display state.

[0054] It should be understood that in the daytime mode of a display device, the yellow-green primary colors are not used preferentially. The yellow-green primary colors are only used in HDR or ultra-high brightness mode to achieve higher brightness and lower power consumption. In contrast, in the nighttime mode of a multi-primary-color display device, the yellow-green primary colors are used preferentially. The yellow-green primary colors are used as much as possible to replace the green primary color while maintaining the same color reproduction. This can further reduce the non-visual effects of artificial light sources on the display device.

[0055] Furthermore, in this embodiment, when displaying images by dynamically adjusting the fifth primary color, the full width at half maximum (FWHM) of the blue-violet primary color can be set to less than 44nm to improve the display effect.

[0056] The fifth primary color wavelength of a multi-primary color display is 545nm to 600nm, corresponding to photon energies between 2.0663eV and 2.2749eV, and photon frequencies between 499.64THz and 550.08THz. However, depending on the specific application, this wavelength range does not only include yellow-green, but also includes colors such as yellow and orange. In other words, the fifth primary color includes yellow-green, yellow, or orange primary colors.

[0057] Of course, considering the specific application effect, the wavelength range of the fifth primary color can be limited to 555nm to 565nm, corresponding to photon energy between 2.1943eV and 2.2339eV, photon frequency between 530.59THz and 540.17THz, and the full width at half maximum (FWHM) of the blue primary color luminescent material should not be greater than 44nm.

[0058] Furthermore, the specific recommended wavelength for the fifth primary color varies depending on the type of luminescent material. However, a yellow-green luminescent material without a shoulder peak can be selected here, or a yellow-green luminescent material with a shoulder peak removed using an appropriate filter. In the field of lighting displays, there is little research and development of dedicated luminescent or color conversion materials for yellow-green primary colors. Moreover, traditional LCD color filters, composed of negative photoresist and colorants, have a wide full width at half maximum (FWHM) of transmission, making it difficult to filter out the monochromatic Lime primary color from broad-spectrum yellow phosphors such as Silicate and YAG (yttrium aluminum garnet) phosphors. Therefore, using quantum dot color conversion materials, quantum dot electroluminescence technology, or laser / projection display technology yields better results.

[0059] In each pixel unit, the wavelength range of the first primary color is 620nm to 660nm. Specifically, the first primary color is red, with photon energy between 1.8785eV and 1.9997eV and light frequency between 454.23THz and 483.54THz. In this scheme, the optimal wavelength for the red primary color is 655nm to 660nm. The specific recommended wavelength for the red primary color varies depending on the type of red luminescent material; if a laser (coherent light, monochromatic light) is used as the light source, a He-Ne gas laser with a wavelength of 630nm or 632.8nm is recommended to output the red primary color; alternatively, an AlInGaP / GaP multi-quantum-well red solid-state laser with a wavelength of 632nm + optical diffusion device can be used to output the red primary color; of course, a VCSEL laser + optical diffusion device can also be used to output the red primary color. If a fluorescent material with a slightly wider full width at half maximum (FWHM) is used, such as red CdSe / ZnS core-shell quantum dot fluorescent material, whose FWHM is no greater than 40nm, then the recommended wavelength is 625nm to 635nm for the red primary color. If Ca-α-SiAlON:Eu2+ red phosphor is used, since its FWHM is relatively wide, the recommended wavelength is 655nm to 660nm for the red primary color.

[0060] It should be understood that the contradiction in the selection of red primary color wavelength is the contradiction between energy efficiency / visual efficiency and red color saturation. When the full width at half maximum (FWHM) of the red primary color emitting material is narrow, a red primary color with a smaller wavelength can be used to improve visual efficiency and reduce the power and energy consumption of the display system. When the FWHM of the red primary color emitting material is wide, or when the red primary color emitting material has a high-energy shoulder peak, energy efficiency must be sacrificed, and a emitting material with a larger wavelength must be selected to improve the color saturation of the red primary color.

[0061] In this embodiment, the wavelength range of the second primary color is 528 nm to 536 nm. Specifically, the second primary color is green, with photon energy between 2.3131 eV and 2.3481 eV and photon frequency between 559.31 THz and 567.79 THz. Simultaneously, the full width at half maximum (FWHM) of the blue primary color emitting material should be less than 35 nm. The specific recommended wavelength for the green primary color varies depending on the type of green emitting material, but the selected green primary color emitting material should be free of shoulder peaks, or the influence of shoulder peaks should be removed using appropriate filters. If a laser (coherent light, monochromatic light) is used as the light source, a green primary color with a wavelength of 532 nm is recommended. This can be obtained by frequency doubling of a 1064 nm laser, Nd:YVO4, or Yb:YAG solid-state laser through a two-photon effect in nonlinear optics; or by using a 530 nm InGaN / GaN multi-quantum-well green VCSEL solid-state laser with an optical diffusion device. Alternatively, a 534nm wavelength green CdSe / ZnS core-shell quantum dot fluorescent material can be used; an InGaN / GaN multi-quantum-well green LED can also be used. Here, the 515nm-520nm wavelength of conventional green InGaN / GaN multi-quantum-well LED is used because short-wavelength green light introduces too much unnecessary blue stimulation, causing a decrease in the red-green saturation of the yellow screen on the display; and short-wavelength green light introduces too many unnecessary circadian rhythm stimuli, thus offsetting the health benefits of the display's night mode.

[0062] Furthermore, excessively long wavelengths of green primary colors can lead to a decrease in color saturation. For example, green primary colors with wavelengths of 537nm to 545nm can typically only achieve a high color gamut of about 85% to 90% of NTSC / CIE1931, while green primary colors with wavelengths of 550nm can only achieve the ordinary color gamut of sRGB 1966. Therefore, in this embodiment, the green primary color light-emitting device and its performance requirements are very high, and the wavelength should be in the range of 528nm to 536nm. At the same time, the full width at half maximum (FWHM) of the hardware green primary color light-emitting material should be as small as possible.

[0063] In this embodiment, the wavelength range of the third primary color is 460 nm to 468 nm. Specifically, the third primary color is blue, with photon energy between 2.6491 eV and 2.6952 eV, and light frequency between 640.58 THz and 651.72 THz. Furthermore, the full width at half maximum (FWHM) of the blue primary color emitting material should not exceed 31 nm. It should be understood that the selected blue primary color emitting material should be free of shoulder peaks, or that shoulder peaks should be removed using appropriate filters. If a laser (coherent light, monochromatic light) is used as the light source, a blue primary color wavelength of 467.5 nm can be used. This wavelength of laser light can be generated by an Ar-Kr gas laser or a CO2 gas laser.

[0064] In this embodiment, the wavelength range of the fourth primary color is 427nm to 440nm. Specifically, the fourth primary color is blue-violet, with photon energy between 2.8177eV and 2.9035eV, light frequency between 681.35THz and 702.09THz, and the full width at half maximum (FWHM) of the blue-violet luminescent material should not exceed 28nm.

[0065] It should be understood that the selected blue-violet primary color emitting material has no shoulder peak, or that a suitable filter is used to remove the shoulder peak. If a laser (coherent light, monochromatic light) is used as the light source, without the assistance of nonlinear optical sum-frequency technology, 430nm blue lasers are generally produced by using a 671nm laser to pump a Cr:LiSAF crystal for frequency doubling, but the power obtained is only a few mW, and the output wavelength is unstable, resulting in a large light source size. Therefore, a 430nm blue laser that can be achieved using sum-frequency technology is made of Nd-doped... 3+ The 1319 nm spectral line of the crystal and the Pr-doped crystal 3+ The crystal's 639nm spectral line operates simultaneously, and through nonlinear crystal and frequency output, the resulting 430nm output power can reach several hundred mW. It features a narrow spectral linewidth, small light source size, and ease of use. During this process, the leaked 1319nm infrared light has no impact on visual color theory, photobiological safety, or the non-visual biological effects of light; while the leaked 639nm red light, or the leaked 671nm red light, is mixed in an appropriate form within the backlight source for utilization.

[0066] Furthermore, although multi-color display devices include at least five primary colors, in practical use, an image can still be displayed by replacing one of the first to fourth primary colors with the fifth primary color. For example, in a daylight mode with strong ambient light, since the yellow primary color has better spectral efficiency, the fifth primary color can be used to replace the second primary color, i.e., replacing the green primary color with the yellow primary color, to display the image, thereby reducing the power consumption required for display adjustment and improving energy efficiency.

[0067] This embodiment describes a multi-primary-color display device. Each pixel unit of the multi-primary-color display device includes: a first sub-pixel providing a first primary color, a second sub-pixel providing a second primary color, a third sub-pixel providing a third primary color, a fourth sub-pixel providing a fourth primary color, and a fifth sub-pixel providing a fifth primary color. The display states of the multi-primary-color display device include a first display state and a second display state. The first display state includes each pixel unit displaying using its respective first primary color, second primary color, third primary color, and fourth primary color. The second display state includes each pixel unit displaying using its respective first primary color, second primary color, third primary color, and fifth primary color. In this embodiment, by using different primary colors within each pixel unit for image display in different display states, the adjustment range between primary colors can be effectively reduced, thereby improving the energy efficiency of the display device and reducing power consumption.

[0068] Reference Figure 2 , Figure 2 This is a flowchart illustrating a first embodiment of the display control method for a multi-primary-color display device according to the present invention. This embodiment provides a display control method for a multi-primary-color display device, the multi-primary-color display device comprising a plurality of pixel units, each pixel unit comprising: a first sub-pixel providing a first primary color, a second sub-pixel providing a second primary color, a third sub-pixel providing a third primary color, a fourth sub-pixel providing a fourth primary color, and a fifth sub-pixel providing a fifth primary color.

[0069] The display control method includes:

[0070] Step S10: Obtain the display mode of the multi-color display device, the display mode including day mode and night mode.

[0071] Daytime mode refers to a mode where the light intensity is within the normal range for daytime. Nighttime mode refers to a mode where the light intensity is within the normal range for nighttime. Daytime and nighttime modes should be determined based on the specific light intensity, not just the time of day. For example, it's unreasonable to assume the display is in nighttime mode in an environment with high-powered spotlights at night. To determine daytime and nighttime modes, a fixed light intensity reference value can be set. If the current light intensity is greater than the reference value, the display is considered to be in daytime mode; if the light intensity is less than the reference value, it is considered to be in nighttime mode.

[0072] Step S20: Determine the display state of the multi-color display device according to the display mode.

[0073] It should be understood that each pixel unit in a multi-primary-color display device includes five primary colors. These five primary colors can form various display states, including three-primary-color, four-primary-color, and even five-primary-color display states. Multi-primary-color display devices should use different display states in different display modes. Therefore, when determining the display mode of a multi-primary-color display device, it is necessary to determine the display states based on the display mode, thereby utilizing different combinations of primary colors for display.

[0074] In step S20, the multi-color display device displays in the daytime mode through a first display state, the first display state including each pixel unit displaying through its respective first primary color, second primary color, third primary color and fourth primary color;

[0075] It should be understood that in daytime mode, due to the strong ambient light intensity in the environment where the multi-primary-color display device is located, it is necessary to use primary colors with high spectral visibility to improve display brightness. Therefore, in this embodiment, the daytime mode can be displayed using a combination of the first primary color, the second primary color, the third primary color, and the fourth primary color, wherein the fourth primary color can be a primary color with high spectral visibility. For example, in daytime mode, when displaying through a MiniLED display device, the LEDs providing the first to fourth primary colors among the different primary color LEDs in the MiniLED display device are in normal working condition, using the first to fourth primary colors for status display, enabling high brightness display under low power consumption. The fourth primary color can be a yellow primary color with very high spectral visibility.

[0076] In step S20, the multi-color display device displays in the night mode through a second display state, the second display state including each pixel unit displaying through its respective first primary color, second primary color, third primary color and fifth primary color.

[0077] It should be noted that the multi-primary-color display device is in night mode, where the ambient light intensity is not very high. Therefore, it does not need to combine primary colors with very high spectral visibility efficiency to display normally. Furthermore, in night mode, primary colors that avoid causing light stimulation to the user can be selected for display, thus using primary colors with lower circadian rhythm factors. Therefore, in this embodiment, the multi-level color display device can also display in night mode by combining the first primary color, the second primary color, the third primary color, and the fifth primary color, where the fifth primary color is a primary color with a low circadian rhythm factor, such as yellow-green.

[0078] This embodiment provides a display control method for a multi-primary-color display device. The method acquires the display mode of the multi-primary-color display device, including a daytime mode and a nighttime mode; determines the display state of the multi-primary-color display device based on the display mode; and displays the image using primary color combinations under different display states. In this embodiment, by using different primary colors within each pixel unit for image display under different display states, the adjustment range between primary colors can be effectively reduced, thereby improving the energy efficiency of the display device and reducing power consumption.

[0079] In other embodiments of the present invention, when the display mode of the multi-color display device is switched from the daytime mode to the nighttime mode, each pixel unit uses its respective fifth primary color to replace the fourth primary color for display.

[0080] It should be understood that during a long display process, the light intensity in the environment where the multi-color display device is located may change, causing the display mode of the multi-color display device to change, and the corresponding display state of the multi-color display device will also change.

[0081] When light intensity changes, the display mode of the multi-primary-color display device can switch according to the change in current light intensity, and the display mode also needs to change accordingly. The specific process of changing the display state of the multi-primary-color display device can be as follows: first, turn off the current display state, then turn on the switched display state. That is, control the sub-pixels used for illumination in the current display state to stop emitting light, and then start the sub-pixels corresponding to the switched display state to enter the illumination state, thereby achieving the switching of display states. Alternatively, in this embodiment, it is also possible to first determine the sub-pixels in the current display state that are in the illumination state and the sub-pixels that will emit light in the switched display state, keeping the state of the sub-pixels that are in the same state before and after the switch unchanged, and then switching the state of the sub-pixels whose state has changed, thereby achieving the switching of display states. For example, when switching the multi-primary-color display device from the first display state to the second display state, the states of the sub-pixels corresponding to the first to third primary colors can be kept unchanged, and then the states of the sub-pixels corresponding to the fourth and fifth primary colors can be switched, thereby achieving the switching of the display state of the multi-primary-color display device.

[0082] Furthermore, in this embodiment, the display states of the multi-primary-color display device also include a third display state and a fourth display state. The third display state includes each pixel unit displaying using the first primary color, the second primary color, and the third primary color. The fourth display state includes each pixel unit displaying using the first primary color, the second primary color, the third primary color, the fourth primary color, and the fifth primary color.

[0083] The third display state utilizes the three primary colors (first to third primary colors) for display. The fourth display state utilizes all five primary colors simultaneously. The third display state is the commonly used three-primary-color display state, which will not be elaborated upon here. The fifth display state includes the use of a fifth primary color in combination with the first to fourth primary colors. Since the fifth primary color is any one of yellow, green, or orange, it has higher spectral visibility efficiency in daytime mode and lower circadian rhythm effect factor in nighttime mode. Therefore, displaying images by combining the fifth primary color with the first to fourth primary colors not only achieves low-power, high-brightness display effects in daytime mode but also reduces the impact on sleep quality in nighttime mode.

[0084] The corresponding display control method also includes:

[0085] The multi-color display device displays in daytime mode through the third display state or the fourth display state.

[0086] It should be understood that multi-color display devices can display images not only in the first display state, but also in the third and fourth display states during daytime mode. The specific display state used can be determined based on the display power consumption and brightness. For example, if the multi-color display device has sufficient power, it can use the third display state to display images, while under conditions of insufficient power or energy saving, it can use the first or fourth display state.

[0087] Furthermore, the multi-primary-color display device of the present invention can also provide a color gamut mapping method, the specific steps of which are as follows.

[0088] Upon receiving an image signal, the function form space of the input primary color corresponding to the image signal is converted into a linear space of the primary color.

[0089] It should be understood that in the daytime mode of a display device, the yellow-green primary colors are not used preferentially. The yellow-green primary colors are only used in HDR or ultra-high brightness mode to achieve higher brightness and lower power consumption. In contrast, in the nighttime mode of a multi-primary-color display device, the yellow-green primary colors are used preferentially. The yellow-green primary colors are used as much as possible to replace the green primary color while maintaining the same color reproduction. This can further reduce the non-visual effects of artificial light sources on the display device.

[0090] It should be noted that the image signal is the signal corresponding to the image to be displayed. The input primary color refers to the primary color corresponding to the image within the image signal; this input primary color is the primary color in the preset color architecture of the multi-primary-color display device. The function form space refers to the function representation of the input primary color; for example, the function form space of the RGB three primary colors can be the gamma power function space. The primary color linear space is a display method used to directly show the proportion of the corresponding primary color; the primary colors can be adjusted within this primary color linear space.

[0091] It should be understood that when an image signal is received, the functional form space of the input primary color corresponding to the image signal can be converted into the corresponding primary color linear space, so that each level of color can be adjusted within the primary color linear space.

[0092] Determine the gain parameter of the input primary color based on the image signal;

[0093] It should be noted that the gain parameter refers to the parameter used to generate the primary color from the input primary color. For example, when generating a yellow-green primary color, the input primary colors can be red and green. In this case, the range of yellow-green primary colors generated from red and the corresponding gain parameter can be calculated. The same applies to green. The gain parameter can be determined based on the proportion of specific colors in the image to be displayed. If the proportion of red in the image is large, the gain parameter of the red primary color should also be large. The gain parameter of the red primary color in an image signal should be a fixed parameter, and similarly, the gain parameter of the green primary color should also be a fixed parameter. In practical implementation, the input image signal can be analyzed to obtain the proportion of each primary color, thereby determining the gain parameter corresponding to each primary color.

[0094] The target primary color is obtained by mapping according to the gain parameter within the primary color linear space.

[0095] It should be understood that during the mapping process, more primary colors can be mapped from the input primary colors. For example, a yellow-green primary color can be mapped from red and green primary colors, thus displaying the image using red, green, and yellow-green primary colors. In specific implementations, within the linear space of primary colors, mapping can be performed based on each primary color and its corresponding gain parameter to obtain the primary color to be displayed for each primary color. Then, the identical primary colors generated from the primary colors to be displayed are merged to obtain the target primary color. For example, mapping red primary colors yields a portion of yellow-green primary colors, and mapping green primary colors yields another portion with a changed primary color. The two portions of yellow-green primary colors are merged to obtain the target primary color, which consists of red, green, and yellow-green primary colors.

[0096] The step of mapping the target primary color within the linear space of the primary color according to the gain parameter specifically includes:

[0097] Within the linear space of the primary colors, the primary color values ​​of the primary color to be generated and the primary color values ​​of the input primary color are calculated according to the gain parameter; the spatial form of the primary color values ​​of the primary color to be generated and the primary color values ​​of the input primary color is converted into a function form space to obtain the target primary color.

[0098] Then, the target primary color is filtered to obtain the filtered target primary color; according to the image signal, the filtered target primary color is arranged into pixels and displayed to achieve color gamut mapping.

[0099] It should be understood that the base color value of the primary color to be generated refers to the specific value of the primary color after mapping. This base color value is the sum of the values ​​of the primary color obtained after mapping all other primary colors. For example, after mapping red and green primary colors, a portion of yellow-green primary colors are generated. The sum of the base color values ​​of the yellow-green primary colors obtained after mapping red and green primary colors is used as the base color value to be generated. In this embodiment, the base color value of the input primary color refers to the base color value remaining after mapping. During the mapping process, some red primary colors are converted to yellow-green primary colors after mapping, while the base color values ​​corresponding to the other unconverted red primary colors are the base color values ​​of the input primary colors corresponding to the red primary colors.

[0100] It should be understood that before performing the mapping transformation, the functional form space of the input primary colors is converted into the linear space of the primary colors. After the mapping is completed, the obtained primary color values ​​can also be converted into the functional form space for display.

[0101] It should be understood that each primary color has a certain wavelength range. After mapping, the target primary color can be filtered to remove waveforms that do not belong to that range, so that the filtered target primary color can display the image to be displayed. For example, the yellow-green primary color obtained after mapping red primary color may contain some primary colors with wavelengths exceeding 600nm. In this case, it is necessary to filter out the primary color waves to avoid interfering with the displayed image.

[0102] It should be understood that after the image mapping corresponding to the image signal is completed, the pixels need to be arranged according to the target primary color obtained after filtering to obtain the pixels used to display the image, and the pixels are arranged to obtain the image to be displayed.

[0103] This color gamut mapping method, upon receiving an image signal, converts the functional form space of the input primary color corresponding to the image signal into a linear space of primary colors; determines the gain parameter of the input primary color based on the image signal; and obtains the target primary color by mapping within the linear space of primary colors according to the gain parameter. This color gamut mapping method can better render image details and edge smoothing effects, achieving better pixel rendering and display effects.

[0104] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A multi-primary color display device, characterized by comprising: include: Multiple pixel units, each pixel unit comprising: a first sub-pixel providing a first primary color, a second sub-pixel providing a second primary color, a third sub-pixel providing a third primary color, a fourth sub-pixel providing a fourth primary color, and a fifth sub-pixel providing a fifth primary color; The display states of the multi-primary-color display device include a first display state and a second display state. The first display state includes each pixel unit displaying using its respective first primary color, second primary color, third primary color, and fourth primary color. The second display state includes each pixel unit displaying using its respective first primary color, second primary color, third primary color, and fifth primary color. The first primary color is red, the second primary color is green, the third primary color is blue, the fourth primary color is blue-violet, and the fifth primary color is yellow, yellow-green, or orange.

2. The multi-primary display device of claim 1, wherein The wavelength of the first primary color is between 620 nm and 660 nm; and / or The wavelength of the second primary color is between 528 nm and 536 nm; and / or The wavelength of the third primary color is between 460nm and 468nm; and / or The wavelength of the fourth primary color is between 427 and 440 nm; and / or The wavelength of the fifth primary color is between 545nm and 600nm.

3. The multi-primary display device of claim 2, wherein, The full width at half maximum (FWHM) of the first primary color is less than or equal to 85 nm; and / or The full width at half maximum (FWHM) of the second primary color is less than or equal to 35 nm; and / or The full width at half maximum (FWHM) of the third primary color is less than or equal to 31 nm; and / or The full width at half maximum (FWHM) of the fourth primary color is less than or equal to 28 nm; and / or The full width at half maximum (FWHM) of the fifth primary color is less than or equal to 44 nm.

4. The multi-primary display apparatus of claim 1 or 3, wherein The display modes of the multi-color display device include a daytime mode and a nighttime mode. The multi-color display device displays in the daytime mode through the first display state, and the multi-color display device displays in the nighttime mode through the second display state.

5. The multi-primary display apparatus of claim 4, wherein The display states of the multi-primary-color display device further include a third display state and a fourth display state. The third display state includes each pixel unit displaying using its respective first primary color, second primary color, and third primary color. The fourth display state includes each pixel unit displaying using its respective first primary color, second primary color, third primary color, fourth primary color, and fifth primary color.

6. The multi-primary display apparatus of claim 5, wherein, The multi-color display device displays in daytime mode through the third display state or the fourth display state.

7. The multi-primary display apparatus of claim 1, wherein The types of multi-color display devices include micro LED, mini LED, LCD, OLED, QLED, or laser projection display.

8. A display control method of a multi-primary color display device, characterized by, The multi-primary-color display device includes multiple pixel units, each pixel unit comprising: a first sub-pixel providing a first primary color, a second sub-pixel providing a second primary color, a third sub-pixel providing a third primary color, a fourth sub-pixel providing a fourth primary color, and a fifth sub-pixel providing a fifth primary color; the display control method includes: Obtain the display mode of the multi-color display device, the display mode including day mode and night mode; The display state of the multi-color display device is determined according to the display mode; In the daytime mode, the multi-color display device displays through a first display state, which includes each pixel unit displaying through its respective first primary color, second primary color, third primary color, and fourth primary color. The multi-color display device displays in the night mode through its respective second display state, the second display state including each pixel unit displaying through the first primary color, the second primary color, the third primary color and the fifth primary color; Wherein, the first primary color is red, the second primary color is green, the third primary color is blue, the fourth primary color is blue-violet, and the fifth primary color is yellow, yellow-green, or orange.

9. The display control method according to claim 8, wherein When the display mode of the multi-color display device is switched from the daytime mode to the nighttime mode, each pixel unit uses its respective fifth primary color to replace the fourth primary color for display.

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