Dual-spectrum stereoscopic display device, system and method

Abstract

This invention relates to a dual-spectral stereoscopic display device, system, and method. The device includes a display source comprising a first group of light-emitting units and a second group of light-emitting units. The first group of light-emitting units emits light only in a first independent spectral band, and the second group of light-emitting units emits light only in a second independent spectral band. The first and second independent spectral bands do not overlap and each possesses a complete color gamut. A spectral isolation band is provided between the first and second independent spectral bands. The first and second groups of light-emitting units are spatially separated. The technical solution provided by this invention achieves stereoscopic display by emitting light simultaneously in dual-spectral bands, solving problems such as screen flicker and crosstalk in the prior art. It can obtain stable, high-quality stereoscopic display output and does not have special optical polarization requirements on the display screen material, thus having wider compatibility.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of optoelectronic display technology, and in particular to a dual-spectrum stereoscopic display device, system and method. Background Technology

[0002] Light-emitting diode (LED) display technology is increasingly widely used in modern information society and has become an important way for people to obtain information. Among them, 3D LED displays are also being used more and more due to their immersive visual experience.

[0003] In principle, stereoscopic LED displays can generally be divided into two types: electronic shutter and polarized light. Electronic shutter displays alternately display left and right images at a frame rate of 120Hz. Viewers wear electronic shutter glasses that are synchronized with the image. When the screen displays the left image, the left lens of the glasses opens while the right lens closes, so the viewer only sees the left image. When the screen displays the right image, the left lens closes while the right lens opens, so the viewer only sees the right image. The rapid alternation of images creates stereoscopic vision in the viewer's brain. This method suffers from noticeable flicker, high glasses maintenance costs, and can cause visual discomfort with prolonged viewing. Polarized light displays divide the screen's light-emitting pixels into left-handed and right-handed types. Left-handed pixels display the left image, while right-handed pixels display the right image. Viewers wear polarized glasses with a left-handed lens on the left and a right-handed lens on the right. In this case, the left lens only allows the left image to pass through, and the right lens only allows the right image to pass through, creating stereoscopic vision in the viewer's brain. This method suffers from significant brightness loss, limited viewing angle, and susceptibility to crosstalk. Summary of the Invention

[0004] Based on the above-mentioned situation of the prior art, the purpose of the embodiments of the present invention is to provide a dual-spectrum stereoscopic display device, system and method, which uses simultaneous emission of light from dual-spectrum bands to achieve stereoscopic display, solves the problems of screen flicker and crosstalk in the prior art, and can obtain stable and high-quality stereoscopic display output. At the same time, it does not have special optical polarization requirements on the material of the display screen, and has wider compatibility.

[0005] To achieve the above objectives, according to one aspect of the present invention, a dual-spectral stereoscopic display device is provided, the device comprising a display source, the display source comprising a first light-emitting unit group and a second light-emitting unit group, wherein the first light-emitting unit group emits light only in a first independent spectral range, and the second light-emitting unit group emits light only in a second independent spectral range. The first independent spectral range and the second independent spectral range do not overlap and each has a complete color gamut. A spectral isolation range is provided between the first independent spectral range and the second independent spectral range. The first light-emitting unit group and the second light-emitting unit group are arranged separately in space.

[0006] Furthermore, the arrangement of the light-emitting units of the first light-emitting unit group and the light-emitting units of the second light-emitting unit group on the display source can be any one of alternating row arrangement, alternating column arrangement, alternating arrangement of individual light-emitting units, and alternating chessboard arrangement.

[0007] Furthermore, the alternating row arrangement includes: light-emitting units in odd-numbered rows of the first light-emitting unit group and light-emitting units in even-numbered rows of the second light-emitting unit group; or light-emitting units in odd-numbered rows of the second light-emitting unit group and light-emitting units in even-numbered rows of the first light-emitting unit group; The alternating arrangement of columns includes: odd-numbered columns consisting of light-emitting units of the first light-emitting unit group and even-numbered columns consisting of light-emitting units of the second light-emitting unit group; or odd-numbered columns consisting of light-emitting units of the second light-emitting unit group and even-numbered columns consisting of light-emitting units of the first light-emitting unit group; The alternating arrangement of light-emitting units includes: the light-emitting units of the first light-emitting unit group and the light-emitting units of the second light-emitting unit group are arranged alternately, such that the light-emitting units of the first light-emitting unit group are adjacent to the light-emitting units of the second light-emitting unit group in all directions. The chessboard-like alternating arrangement includes: odd-numbered rows where the light-emitting units of the first light-emitting unit group and the compensation light-emitting units are arranged alternately along the row direction, and even-numbered rows where the compensation light-emitting units and the second light-emitting unit group are arranged alternately along the row direction, such that the light-emitting units of each first light-emitting unit group are adjacent to the compensation light-emitting units in all directions, and the light-emitting units of each second light-emitting unit group are adjacent to the compensation light-emitting units in all directions.

[0008] Furthermore, the first independent spectral range and the second independent spectral range are each composed of two sets of non-overlapping sub-wavelength ranges corresponding to the RGB three primary colors. The difference between the two sets of sub-wavelength ranges corresponding to the primary colors constitutes part of the spectral isolation range. The width of each sub-wavelength range is 15nm - 20nm, and the width of the spectral isolation range is 5nm - 24nm.

[0009] Furthermore, the device also includes a color temperature and light intensity equalization compensation unit; The color temperature and light intensity equalization compensation unit is used to determine a first duty cycle for the first group of light-emitting units and a second duty cycle for the second group of light-emitting units based on the target white balance color temperature; and, The first light-emitting unit group is driven using the first duty cycle, and the second light-emitting unit group is driven using the second duty cycle.

[0010] Furthermore, the color temperature and light intensity equalization compensation unit determines a first duty cycle for the first light-emitting unit group based on the target white balance color temperature, including: Determine the target white light color coordinates based on the target white balance color temperature; A primary color matrix is ​​constructed based on the color coordinates of each primary color light source in the first light-emitting unit group; Based on the primary color matrix and the target white light color coordinates, the luminous flux ratio of each primary color is calculated. The luminous flux ratio of each primary color is converted into pulse width modulation duty cycle to obtain the first duty cycle; The color temperature and light intensity equalization compensation unit determines the second duty cycle for the second light-emitting unit group based on the target white balance color temperature, including: Determine the target white light color coordinates based on the target white balance color temperature; Based on the color coordinates of each primary color light source in the second light-emitting unit group, a primary color matrix is ​​constructed; Based on the primary color matrix and the target white light color coordinates, the luminous flux ratio of each primary color is calculated. The luminous flux ratio of each primary color is converted into a pulse width modulation duty cycle to obtain the second duty cycle.

[0011] Furthermore, the color temperature and light intensity equalization compensation unit, based on the target white balance color temperature, determines a first duty cycle for the first light-emitting unit group and a second duty cycle for the second light-emitting unit group, and further includes: Select multiple sampling color temperatures within the target white balance color temperature range; For each of the sampled color temperatures, a first duty cycle for the first group of light-emitting units and a second duty cycle for the second group of light-emitting units are pre-calculated; The sampled color temperature and its corresponding first duty cycle and second duty cycle are stored in a lookup table; Locate the two sampled color temperatures adjacent to the target white balance color temperature in the lookup table; Linear interpolation is performed on the first duty cycle corresponding to the two sampled color temperatures to obtain the first duty cycle corresponding to the target white balance color temperature. Linear interpolation is performed on the second duty cycle corresponding to the two sampled color temperatures to obtain the second duty cycle corresponding to the target white balance color temperature.

[0012] According to a second aspect of the present invention, a dual-spectrum stereoscopic display system is provided, the system comprising a dual-spectrum stereoscopic display device, a driving adapter module, and a passive filter module; A driver adaptation module is used to map the first parallax frame of the stereoscopic video to the first light-emitting unit group, and to map the second parallax frame of the stereoscopic video to the second light-emitting unit group. A dual-spectrum stereo display device is used to receive a first parallax frame and a second parallax frame, drive a first light-emitting unit group to emit a first composite light carrying information of the first parallax frame, and drive a second light-emitting unit group to emit a second composite light carrying information of the second parallax frame. A passive filter module includes a first filter channel and a second filter channel. The first filter channel is used to selectively transmit light in the first independent spectral range and block light in the second independent spectral range. The second filter channel is used to selectively transmit light in the second independent spectral range and block light in the first independent spectral range. Wherein, the spectral energy of the first composite light is distributed in a first independent spectral range, and the spectral energy of the second composite light is distributed in a second independent spectral range; the first parallax frame is a left-eye parallax frame, and the second parallax frame is a right-eye parallax frame; or, the first parallax frame is a right-eye parallax frame, and the second parallax frame is a left-eye parallax frame.

[0013] According to a third aspect of the present invention, a dual-spectral stereoscopic display method is provided, the method comprising: Receive stereoscopic video in binocular format, and separate the stereoscopic video into a first parallax frame and a second parallax frame; The first parallax frame is mapped to the first light-emitting unit group of the display source, and the first light-emitting unit group is driven to emit a first composite light carrying the first parallax frame; the second parallax frame is mapped to the second light-emitting unit group of the display source, and the second light-emitting unit group is driven to emit a second composite light carrying the second parallax frame. A passive filter module is used to perform spectral filtering on the first composite light and the second composite light, so that the first light receiver only transmits the first composite light to receive the first parallax frame, and the second light receiver only transmits the second composite light to receive the second parallax frame. Wherein, the first disparity frame is a left-eye disparity frame and the second disparity frame is a right-eye disparity frame; or, the first disparity frame is a right-eye disparity frame and the second disparity frame is a left-eye disparity frame.

[0014] Furthermore, it also includes: Based on the target white balance color temperature, determine the first duty cycle for the first group of light-emitting units and the second duty cycle for the second group of light-emitting units; The first light-emitting unit group is driven using the first duty cycle, and the second light-emitting unit group is driven using the second duty cycle.

[0015] In summary, the embodiments of the present invention provide a dual-spectral stereoscopic display device, system, and method. The device includes a display source, which comprises a first group of light-emitting units and a second group of light-emitting units. The first group of light-emitting units emits light only in a first independent spectral range, and the second group of light-emitting units emits light only in a second independent spectral range. The first and second independent spectral ranges do not overlap and each possesses a complete color gamut. A spectral isolation range is provided between the first and second independent spectral ranges. The first and second groups of light-emitting units are spatially separated. The technical solution provided by the embodiments of the present invention achieves stereoscopic display by emitting light simultaneously in dual-spectral bands, solving problems such as screen flicker and crosstalk in the prior art. It can obtain stable and high-quality stereoscopic display output, and at the same time, it does not have special optical polarization requirements on the display screen material, thus having wider compatibility. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the dual-spectrum stereoscopic display device provided in the embodiments of the present invention; Figure 2 This is a schematic diagram of the overall structure of the dual-spectrum stereoscopic display system provided in the embodiments of the present invention; Figure 3 This is a flowchart of the dual-spectral stereoscopic display method provided in the embodiments of the present invention. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0018] It should be noted that, unless otherwise defined, the technical or scientific terms used in one or more embodiments of the present invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in one or more embodiments of the present invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0019] The technical solution of the present invention will now be described in detail with reference to the accompanying drawings. An embodiment of the present invention provides a dual-spectrum stereoscopic display device. Figure 1 The diagram shows an overall structural schematic of the dual-spectrum stereoscopic display device provided in an embodiment of the present invention, as shown below. Figure 1 As shown, the device includes a display source 10, which comprises a first light-emitting unit group 101 and a second light-emitting unit group 102. The first light-emitting unit group 101 emits light only in a first independent spectral range, and the second light-emitting unit group 102 emits light only in a second independent spectral range. The first and second independent spectral ranges do not overlap and each possesses a complete color gamut. In this embodiment of the invention, the display source 10 divides the visible light gamut into two sets of independent spectral ranges that do not overlap and each possesses a complete color gamut, corresponding to the left and right binocular imaging channels of the human eye, respectively, thereby achieving stereoscopic display of the input signal. A spectral isolation range is set between the first and second independent spectral ranges to achieve optical hard isolation between the left and right binocular channels. Specifically, the first light-emitting unit group 101 emits light only in the independent spectral range corresponding to the left eye imaging channel, and the second light-emitting unit group 102 emits light only in the independent spectral range corresponding to the right eye imaging channel. In various embodiments of the invention, the first light-emitting unit group 101 and the second light-emitting unit group 102 are equivalent and interchangeable in terms of hardware structure and functional status.

[0020] In this embodiment of the invention, the light-emitting units of the first light-emitting unit group 101 and the second light-emitting unit group 102 can be LED beads, each LED bead containing red (R), green (G), and blue (B) primary color chips. According to some optional embodiments, each bead contains one RGB primary color chip. The light-emitting units of the first light-emitting unit group 101 are first-type LED beads, and the light-emitting units of the second light-emitting unit group 102 are second-type LED beads. Although the primary color chips in both types of LED beads are still RGB, their wavelengths are different. The wavelengths of the RGB primary color chips in the first-type LED beads correspond to light in a first independent spectral range, and the wavelengths of the RGB primary color chips in the second-type LED beads correspond to light in a second independent spectral range. The first and second independent spectral ranges are composed of two sets of non-overlapping sub-wavelength ranges corresponding to each of the RGB primary colors. The difference between the two sets of sub-wavelength ranges corresponding to the primary colors constitutes part of a spectral isolation range. The width of each sub-wavelength range is 15nm - 20nm, and the width of the spectral isolation range is 5nm - 24nm. According to certain optional embodiments, the wavelengths of the three primary color chips in the first type of LED are R1=615nm-630nm, G1=515nm-540nm, and B1=462nm-478nm, respectively; the wavelengths of the three primary color chips in the second type of LED are R2=635nm-650nm, G2=545nm-560nm, and B2=445nm-460nm, respectively; wherein R1 represents the red chip wavelength of the first type of LED, G1 represents the green chip wavelength of the first type of LED, B1 represents the blue chip wavelength of the first type of LED, R2 represents the red chip wavelength of the second type of LED, G2 represents the green chip wavelength of the second type of LED, and B2 represents the blue chip wavelength of the second type of LED. In the above embodiments of the present invention, by optimizing the wavelength range and ratio of the two types of LEDs and setting spectral isolation ranges, the overlap of light from the two independent spectral ranges can be avoided, reducing the crosstalk rate.

[0021] The first light-emitting unit group 101 and the second light-emitting unit group 102 are spatially separated. The light-emitting units of the first light-emitting unit group 101 and the light-emitting units of the second light-emitting unit group 102 are arranged on the display source 10 in any of the following ways: alternating row arrangement, alternating column arrangement, alternating arrangement of individual light-emitting units, and checkerboard alternating arrangement. Alternating row arrangement includes: odd-numbered rows are light-emitting units of the first light-emitting unit group 101, and even-numbered rows are light-emitting units of the second light-emitting unit group 102; or odd-numbered rows are light-emitting units of the second light-emitting unit group 102, and even-numbered rows are light-emitting units of the first light-emitting unit group 101. Alternating column arrangement includes: odd-numbered columns are light-emitting units of the first light-emitting unit group 101, and even-numbered columns are light-emitting units of the second light-emitting unit group 102; or odd-numbered columns are light-emitting units of the second light-emitting unit group 102, and even-numbered columns are light-emitting units of the first light-emitting unit group 101. Alternating arrangement of individual light-emitting units includes: the light-emitting units of the first light-emitting unit group 101 and the light-emitting units of the second light-emitting unit group 102 are arranged alternately, such that each first light-emitting unit... The light-emitting units of unit group 101 are adjacent to the light-emitting units of the second light-emitting unit group 102 in all directions. The checkerboard alternating arrangement includes: odd-numbered rows where the light-emitting units of the first light-emitting unit group 101 and the compensation light-emitting units are arranged alternately along the row direction, and even-numbered rows where the compensation light-emitting units and the second light-emitting unit group 102 are arranged alternately along the row direction, so that the light-emitting units of each first light-emitting unit group 101 are adjacent to the compensation light-emitting units in all directions, and the light-emitting units of each second light-emitting unit group 102 are adjacent to the compensation light-emitting units in all directions. The compensation light-emitting units are, for example, white light beads. By setting the compensation light-emitting units, the white balance color temperature and brightness of the beads in the first light-emitting unit group and the second light-emitting unit group can be made more consistent.

[0022] According to some optional embodiments, the device further includes a color temperature and light intensity equalization compensation unit 20. The color temperature and light intensity equalization compensation unit 20 is used to determine a first duty cycle for the first light-emitting unit group 101 and a second duty cycle for the second light-emitting unit group 102 based on the target white balance color temperature; and to drive the first light-emitting unit group 101 using the first duty cycle and drive the second light-emitting unit group 102 using the second duty cycle. Since the RGB chip wavelengths of the first type of LEDs in the first light-emitting unit group 101 and the second type of LEDs in the second light-emitting unit group 102 are different, the emitted red, green, and blue light colors and brightness will also be different, resulting in different white color temperature and brightness after mixing. This will cause differences in the image colors seen by the receiver, such as a viewer, for example, the image seen by the left eye is warmer while the image seen by the right eye is cooler. To minimize this difference and ensure consistent red, green, blue, and white light color temperature and brightness when the first light-emitting unit group 101 and the second light-emitting unit group 102 emit light, a color temperature and light intensity equalization compensation unit 20 is provided. This unit adjusts the luminous intensity of the LED beads in the first and second light-emitting unit groups 101 and 102, and optimizes the color temperature of the light-emitting units, so that the color temperature and brightness of the image entering the viewer's left and right eyes are more consistent, thereby reducing viewing fatigue. The color temperature and light intensity equalization compensation unit 20 may include a microcontroller, an FPGA, a memory, and peripheral support circuitry. The microcontroller is used for the overall operation of the color temperature and light intensity equalization compensation unit 20 and the management and scheduling of its components. The FPGA is used for compensation algorithm execution and data processing, and the memory is used for data storage, weighted data LUT lookup and retrieval, etc. In this embodiment of the invention, the principle of the color temperature and light intensity equalization compensation unit 20 is that, since the RGB wavelengths of the LED beads are strictly limited and cannot be changed, the color temperature after color mixing cannot be changed by adjusting the RGB current. Therefore, the brightness of the three primary colors can be adjusted by changing the duty cycle of the RGB current of the LED beads, i.e., the on / off time. The change in the brightness of the three primary colors directly affects the color temperature of the white light after color mixing. Pulse Width Modulation (PWM) dimming refers to changing the luminous intensity of the driven LED light source by adjusting the PWM duty cycle of the input drive module. Compared with other methods, it has the advantages of not changing the LED current pulse amplitude, high driver efficiency, and simple connection to the control system. For practical engineering operability, the duty cycle of the input drive is set to be directly proportional to the luminous flux (brightness) output of the light source. Combining Grassmann's color law, according to the color mixing principle and the International Commission on Illumination (CIE) 1931 color coordinate calculation method, a color temperature and light intensity compensation calculation model is established. This model determines the functional relationship between RGB monochromatic color coordinates and correlated color temperature, and calculates the corresponding duty cycle value accordingly to control the output of the corresponding drive module. Grassmann's law of color mixing defines the relationship between the color coordinates of mixed white light and the brightness (luminous flux) of each primary color: in, and The chromaticity coordinates of the mixed white are represented. Indicates the brightness of mixed white; Let represent the color coordinates of the primary colors that make up the mixed white, where i corresponds to different primary colors, Ci represents the scaling factor of each primary color, Di represents the PWM duty cycle of each primary color, and Yi is the maximum single-channel brightness of each primary color. The above formula shows that the color coordinates of the mixed color (e.g., mixed white) can be obtained by summing the color coordinates of each component color according to their respective proportions, and the brightness of the mixed color can also be obtained by summing the brightness of each component color according to their respective proportions.

[0023] The color temperature and light intensity equalization compensation unit determines the first duty cycle for the first group of light-emitting units based on the target white balance color temperature, which can be achieved through the following steps: S102. Determine the target white light color coordinates based on the target white balance color temperature. According to colorimetry theory, the color coordinates (x, y) can be solved from the color temperature CCT (unit: K).

[0024] For example, when the target white balance color temperature CCT is set to 5000 K, the target white balance color coordinates (x, y) can be solved using the above formula.

[0025] S104. Construct a primary color matrix based on the color coordinates of each primary color light source in the first light-emitting unit group. The color coordinates of each primary color light source are pre-determined using relevant instruments during production debugging. The tristimulus values ​​of each primary color at unit brightness are: in, , , These represent the tristimulus values ​​of red, green, and blue, respectively, and the color coordinates of the red, green, and blue light sources are respectively... , , The primary color matrix can be represented as: in, , , These represent the actual brightness (luminous flux) of the red, green, and blue channels, respectively. M represents the coefficient matrix, and B represents the luminous flux matrix.

[0026] S106. Based on the primary color matrix and the target white light color coordinates, calculate the luminous flux ratio of each primary color. Calculate the tristimulus values ​​of the target white light based on the target white light color coordinates (assuming a total luminance of 1): Based on the primary color matrix and the target white light color coordinates, the matrix equation is established as follows: Right now Solving the above matrix equations yields the actual brightness (luminous flux) of each primary color. , , That is, the absolute value of luminous flux required to achieve the target color temperature (corresponding to...) (Value at time). For ease of calculation, the brightness is set to 1; the actual value only needs to be multiplied by the actual brightness.

[0027] According to certain optional implementations, color gamut checks can also be performed on multiple actual luminance (luminous flux) values ​​obtained from the solutions: if any of the obtained values... (i is r, g, or b), indicating that the target white balance color temperature exceeds the color gamut range of the RGB light source, and the target white balance color temperature needs to be adjusted or the LED beads need to be replaced.

[0028] S108. Convert the luminous flux ratio of each primary color into a pulse width modulation duty cycle to obtain the first duty cycle. Assuming the LED driver is a constant current PWM and the luminous flux and duty cycle have a strictly linear relationship, the duty cycle can be obtained according to the following formula: in, , , These represent the first duty cycles for red, green, and blue, respectively. , , These represent the maximum luminous flux of the red, green, and blue channels, respectively.

[0029] According to certain optional implementations, the duty cycle described above can also be Gamma corrected, and the corrected duty cycle is expressed as: in, .

[0030] The color temperature and light intensity equalization compensation unit determines the second duty cycle for the second light-emitting unit group based on the target white balance color temperature, which can be achieved through the following steps: S202. Determine the target white light color coordinates based on the target white balance color temperature.

[0031] S204. Construct a primary color matrix based on the color coordinates of each primary color light source in the second light-emitting unit group.

[0032] S206. Based on the primary color matrix and the target white light color coordinates, solve for the luminous flux ratio of each primary color.

[0033] S208 converts the luminous flux ratio of each primary color into a pulse width modulation duty cycle to obtain a second duty cycle.

[0034] The specific implementation method and formulas involved in determining the second duty cycle are the same as those in the first duty cycle determination process provided in the above implementation method, and their repeated description will be omitted here.

[0035] According to certain optional implementations, the color temperature and light intensity equalization compensation unit is also used to determine the brightness ratio of the second / first light-emitting unit group based on the known brightness ratio of the first / second light-emitting unit group. The light-emitting units of the first and second light-emitting unit groups each have different color coordinates. It is necessary to ensure that the white light mixed by each of the two light-emitting unit groups has the same color temperature, and that the brightness can be independently controlled or kept consistent. The brightness ratios of each group can be calculated separately according to the required color temperature using the above calculation method. For example, if the color coordinates and brightness values ​​of the light-emitting units of the first light-emitting unit group are already determined (e.g., set by the user or a default value), it is necessary to adjust the brightness values ​​of the light-emitting units of the second light-emitting unit group so that the color coordinates of the mixed white light are the same as those of the mixed white light of the first light-emitting unit group (or vice versa). The calculation method in this case is as follows: S302. Calculate the actual color coordinates of the light-emitting units in the first light-emitting unit group. Based on the known brightness B of the first light-emitting unit group... r1 B g1 B b1 Calculate its mixed tristimulus value: The color coordinates of the light-emitting units in the first light-emitting unit group can then be expressed as: S304. Equal the mixed chromatic coordinates of the light-emitting units in the second light-emitting unit group to the mixed chromatic coordinates of the light-emitting units in the first light-emitting unit group, and solve for the brightness ratio of the light-emitting units in the second light-emitting unit group. Let the mixed chromatic coordinates of the light-emitting units in the second light-emitting unit group be (x1, y1), and set the total brightness Y2 to an arbitrary value (e.g., let Y2 = 1). Then the target tristimulus value of the second light-emitting unit group can be expressed as: Solve the following system of equations: The brightness ratio of the light-emitting units in the second light-emitting unit group can then be obtained.

[0036] According to certain optional implementations, a first duty cycle for the first light-emitting unit group and a second duty cycle for the second light-emitting unit group are determined. To avoid real-time matrix inverse operations, a lookup table can be pre-calculated and stored, specifically including the following steps: S402. Select multiple sampling color temperatures within the target white balance color temperature range. Select N sampling points at equal intervals (N=256 or 1024) within the target white balance color temperature range (e.g., 2000K~10000K).

[0037] S404. For each sampled color temperature, pre-calculate the first duty cycle for the first light-emitting unit group and the second duty cycle for the second light-emitting unit group. The calculation method for the first duty cycle and the second duty cycle is the same as that provided in the above embodiments of the present invention, and its repeated description will be omitted here.

[0038] S406. Store the sampled color temperature and its corresponding first and second duty cycles in a lookup table. The lookup table can be, for example, a two-dimensional array stored in EEPROM or Flash, represented as: S408. Locate the two sampled color temperatures adjacent to the target white balance color temperature in the lookup table. Perform linear interpolation on the first duty cycle corresponding to the two sampled color temperatures to obtain the first duty cycle corresponding to the target white balance color temperature. Perform linear interpolation on the second duty cycle corresponding to the two sampled color temperatures to obtain the second duty cycle corresponding to the target white balance color temperature. Find the values ​​corresponding to the two adjacent sampling points k and k+1 in the lookup table LUT. Perform linear interpolation on the PWM duty cycle of each light-emitting unit group to obtain the first duty cycle and the second duty cycle respectively. Where D represents the duty cycle value, CCT represents the color temperature value, and k and k+1 represent two adjacent sampling points, respectively. The above formula calculates the duty cycle value of the required color temperature point based on the pre-stored duty cycle data and color temperature values ​​of adjacent color temperature sampling points.

[0039] According to certain optional implementations, the lookup table may also store the brightness (luminous flux) of the three primary colors of each light-emitting unit group, and the duty cycle or brightness (luminous flux) of each primary color in the second light-emitting unit group may be obtained by looking up the table according to the duty cycle or brightness (luminous flux) of each primary color in the first light-emitting unit group.

[0040] An embodiment of the present invention also provides a dual-spectrum stereoscopic display system. Figure 2 The diagram shows an overall structural schematic of the dual-spectral stereoscopic display system provided by an embodiment of the present invention, as shown below. Figure 2 As shown, the system includes a dual-spectrum stereo display device, a driving adapter module, and a passive filter module.

[0041] The driver adaptation module maps the first parallax frame of the stereoscopic video to the first group of light-emitting units (LEDs), and the second parallax frame of the stereoscopic video to the second group of LEDs, to achieve stereoscopic imaging through a dual-spectrum stereoscopic display device. The driver adaptation module can adapt to common stereoscopic source formats, including top-bottom and side-by-side formats. It can process stereoscopic video in binocular format (side-by-side or top-bottom) and synthesize the video according to the arrangement of the LEDs in the first and second LED groups on the display source. The purpose is to transmit the left-side image data to the first LED group for display, and the right-side image to the second LED group for display, and vice versa. The top-bottom image processing is similar. The first parallax frame is the left-eye parallax frame, and the second parallax frame is the right-eye parallax frame; or the first parallax frame is the right-eye parallax frame, and the second parallax frame is the left-eye parallax frame.

[0042] A dual-spectrum stereoscopic display device is used to receive a first parallax frame and a second parallax frame, drive a first light-emitting unit group to emit a first composite light carrying information of the first parallax frame, and drive a second light-emitting unit group to emit a second composite light carrying information of the second parallax frame.

[0043] A passive filtering module includes a first filtering channel and a second filtering channel. The first filtering channel selectively transmits light in a first independent spectral range and blocks light in a second independent spectral range. The second filtering channel selectively transmits light in the second independent spectral range and blocks light in the first independent spectral range. The spectral energy of the first composite light is distributed in the first independent spectral range, and the spectral energy of the second composite light is distributed in the second independent spectral range. According to some optional embodiments, the passive filtering module can be passive filtering glasses. Passive filtering glasses include a left lens and a right lens, i.e., the first filtering channel and the second filtering channel. For example, the filter can be made of a multi-layered coated transparent material. The multi-layered coating structure has a bandpass effect, allowing only light of specific wavelengths or bands to pass through, while other wavelengths are reflected, refracted, or absorbed. The left lens selectively transmits light in the independent spectral range corresponding to the left eye imaging channel and blocks light in the independent spectral range corresponding to the right eye imaging channel; the right lens selectively transmits light in the independent spectral range corresponding to the right eye imaging channel and blocks light in the independent spectral range corresponding to the left eye imaging channel. The multi-layered coating material has a cutoff optical density ≥5 and a cutoff steepness ≥0.5nm / OD, ensuring deep cutoff of light in non-corresponding spectral ranges and further reducing crosstalk. Passive filter glasses have no electronic components or polarization layers. Using passive filter glasses as the light receiver to receive stereoscopic display images / videos achieves a passive, power-free beam splitting effect. Viewers see the display source through the passive filter module. Since the left and right parts of the passive filter module correspond to the first and second light-emitting unit groups respectively, the image from the first light-emitting unit group can penetrate the left part to reach the viewer's left eye, while the image from the second light-emitting unit group is blocked. Conversely, the image from the second light-emitting unit group can penetrate the right part to reach the viewer's right eye, while the image from the first light-emitting unit group is blocked. Therefore, the viewer's left eye can only see the left image, and the right eye can only see the right image, thus forming stereoscopic vision in the brain.

[0044] An embodiment of the present invention also provides a dual-spectral stereoscopic display method. Figure 3 The flowchart of the method is shown in the figure. Figure 3 As shown, the method includes: S501: Receive stereoscopic video in binocular format and separate the stereoscopic video into left-eye parallax frames and right-eye parallax frames.

[0045] S502: Map the first parallax frame to the first light-emitting unit group of the display source, and drive the first light-emitting unit group to emit a first composite light carrying the first parallax frame; map the second parallax frame to the second light-emitting unit group of the display source, and drive the second light-emitting unit group to emit a second composite light carrying the second parallax frame.

[0046] S503. A passive filter module is used to perform spectral filtering on the first composite light and the second composite light, so that the first light receiver only transmits the first composite light to receive the first disparity frame, and the second light receiver only transmits the second composite light to receive the second disparity frame. The first disparity frame is a left-eye disparity frame, and the second disparity frame is a right-eye disparity frame; or, the first disparity frame is a right-eye disparity frame, and the second disparity frame is a left-eye disparity frame.

[0047] According to some optional implementations, the method further includes compensating for color temperature light intensity: S204. Based on the target white balance color temperature, determine the first duty cycle for the first light-emitting unit group and the second duty cycle for the second light-emitting unit group; S205. The first light-emitting unit group is driven using the first duty cycle, and the second light-emitting unit group is driven using the second duty cycle.

[0048] The specific implementation of the above display method and compensation method is the same as the implementation method of each module in the dual-spectrum stereoscopic display device and system provided in the above embodiments of the present invention, and its repeated description will be omitted here.

[0049] In summary, the embodiments of the present invention relate to a dual-spectral stereoscopic display device, system, and method. The device includes a display source, which comprises a first group of light-emitting units and a second group of light-emitting units. The first group of light-emitting units emits light only in a first independent spectral range, and the second group of light-emitting units emits light only in a second independent spectral range. The first and second independent spectral ranges do not overlap and each possesses a complete color gamut. A spectral isolation range is provided between the first and second independent spectral ranges. The first and second groups of light-emitting units are spatially separated. The technical solution provided by the embodiments of the present invention achieves stereoscopic display by emitting light simultaneously in dual-spectral bands, solving problems such as screen flicker and crosstalk in the prior art. It can obtain stable and high-quality stereoscopic display output, and at the same time, it does not have special optical polarization requirements on the display screen material, thus having wider compatibility.

[0050] It should be understood that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention (including the claims) is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of one or more embodiments of the invention as described above, which are not provided in the details for the sake of brevity. The specific embodiments of the invention described above are merely illustrative or explanatory of the principles of the invention and do not constitute a limitation of the invention. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of the invention should be included within the protection scope of the invention. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A dual-spectrum stereoscopic display device, characterized in that, The device includes a display source, which includes a first light-emitting unit group and a second light-emitting unit group. The first light-emitting unit group emits light only in a first independent spectral range, and the second light-emitting unit group emits light only in a second independent spectral range. The first independent spectral range and the second independent spectral range do not overlap and each has a complete color gamut. A spectral isolation range is provided between the first independent spectral range and the second independent spectral range. The first light-emitting unit group and the second light-emitting unit group are arranged separately in space.

2. The apparatus according to claim 1, characterized in that, The arrangement of the light-emitting units of the first light-emitting unit group and the light-emitting units of the second light-emitting unit group on the display source is any one of alternating row arrangement, alternating column arrangement, alternating arrangement of individual light-emitting units, and alternating chessboard arrangement.

3. The apparatus according to claim 2, characterized in that, The alternating row arrangement includes: light-emitting units in odd-numbered rows of the first light-emitting unit group and light-emitting units in even-numbered rows of the second light-emitting unit group; or light-emitting units in odd-numbered rows of the second light-emitting unit group and light-emitting units in even-numbered rows of the first light-emitting unit group; The alternating arrangement of columns includes: odd-numbered columns consisting of light-emitting units of the first light-emitting unit group and even-numbered columns consisting of light-emitting units of the second light-emitting unit group; or odd-numbered columns consisting of light-emitting units of the second light-emitting unit group and even-numbered columns consisting of light-emitting units of the first light-emitting unit group; The alternating arrangement of light-emitting units includes: the light-emitting units of the first light-emitting unit group and the light-emitting units of the second light-emitting unit group are arranged alternately, such that the light-emitting units of the first light-emitting unit group are adjacent to the light-emitting units of the second light-emitting unit group in all directions. The chessboard-like alternating arrangement includes: odd-numbered rows where the light-emitting units of the first light-emitting unit group and the compensation light-emitting units are arranged alternately along the row direction, and even-numbered rows where the compensation light-emitting units and the second light-emitting unit group are arranged alternately along the row direction, such that the light-emitting units of each first light-emitting unit group are adjacent to the compensation light-emitting units in all directions, and the light-emitting units of each second light-emitting unit group are adjacent to the compensation light-emitting units in all directions.

4. The apparatus according to claim 3, characterized in that, The first independent spectral range and the second independent spectral range are each composed of two sets of non-overlapping sub-wavelength ranges corresponding to the three primary colors of RGB. The difference between the two sets of sub-wavelength ranges corresponding to the primary colors constitutes part of the spectral isolation range. The width of each sub-wavelength range is 15nm-20nm, and the width of the spectral isolation range is 5nm-24nm.

5. The apparatus according to claim 4, characterized in that, The device also includes a color temperature and light intensity equalization compensation unit; The color temperature and light intensity equalization compensation unit is used to determine a first duty cycle for the first light-emitting unit group and a second duty cycle for the second light-emitting unit group based on the target white balance color temperature. as well as, The first light-emitting unit group is driven using the first duty cycle, and the second light-emitting unit group is driven using the second duty cycle.

6. The apparatus according to claim 5, characterized in that, The color temperature and light intensity equalization compensation unit determines the first duty cycle for the first light-emitting unit group based on the target white balance color temperature, including: Determine the target white light color coordinates based on the target white balance color temperature; A primary color matrix is ​​constructed based on the color coordinates of each primary color light source in the first light-emitting unit group; Based on the primary color matrix and the target white light color coordinates, the luminous flux ratio of each primary color is calculated. The luminous flux ratio of each primary color is converted into pulse width modulation duty cycle to obtain the first duty cycle; The color temperature and light intensity equalization compensation unit determines the second duty cycle for the second light-emitting unit group based on the target white balance color temperature, including: Determine the target white light color coordinates based on the target white balance color temperature; Based on the color coordinates of each primary color light source in the second light-emitting unit group, a primary color matrix is ​​constructed; Based on the primary color matrix and the target white light color coordinates, the luminous flux ratio of each primary color is calculated. The luminous flux ratio of each primary color is converted into a pulse width modulation duty cycle to obtain the second duty cycle.

7. The apparatus according to claim 6, characterized in that, The color temperature and light intensity equalization compensation unit determines a first duty cycle for the first light-emitting unit group and a second duty cycle for the second light-emitting unit group based on the target white balance color temperature, and further includes: Select multiple sampling color temperatures within the target white balance color temperature range; For each of the sampled color temperatures, a first duty cycle for the first group of light-emitting units and a second duty cycle for the second group of light-emitting units are pre-calculated; The sampled color temperature and its corresponding first duty cycle and second duty cycle are stored in a lookup table; Locate the two sampled color temperatures adjacent to the target white balance color temperature in the lookup table; Linear interpolation is performed on the first duty cycle corresponding to the two sampled color temperatures to obtain the first duty cycle corresponding to the target white balance color temperature. Linear interpolation is performed on the second duty cycle corresponding to the two sampled color temperatures to obtain the second duty cycle corresponding to the target white balance color temperature.

8. A dual-spectrum stereoscopic display system, characterized in that, The system includes a dual-spectrum stereo display device, a driving adapter module, and a passive filter module; The driving adaptation module is used to map the first parallax frame of the stereoscopic video to the first light-emitting unit group, and to map the second parallax frame of the stereoscopic video to the second light-emitting unit group. The dual-spectrum stereo display device is used to receive the first parallax frame and the second parallax frame, drive the first light-emitting unit group to emit a first composite light carrying the information of the first parallax frame, and drive the second light-emitting unit group to emit a second composite light carrying the information of the second parallax frame. The passive filter module includes a first filter channel and a second filter channel. The first filter channel is used to selectively transmit light in the first independent spectral range and block light in the second independent spectral range. The second filter channel is used to selectively transmit light in the second independent spectral range and block light in the first independent spectral range. Wherein, the spectral energy of the first composite light is distributed in a first independent spectral range, and the spectral energy of the second composite light is distributed in a second independent spectral range; the first parallax frame is a left-eye parallax frame, and the second parallax frame is a right-eye parallax frame; or, the first parallax frame is a right-eye parallax frame, and the second parallax frame is a left-eye parallax frame.

9. A dual-spectral stereoscopic display method, characterized in that, The method includes: Receive stereoscopic video in binocular format, and separate the stereoscopic video into a first parallax frame and a second parallax frame; The first parallax frame is mapped to the first light-emitting unit group of the display source, and the first light-emitting unit group is driven to emit a first composite light carrying the first parallax frame; the second parallax frame is mapped to the second light-emitting unit group of the display source, and the second light-emitting unit group is driven to emit a second composite light carrying the second parallax frame. A passive filter module is used to perform spectral filtering on the first composite light and the second composite light, so that the first light receiver only transmits the first composite light to receive the first parallax frame, and the second light receiver only transmits the second composite light to receive the second parallax frame. Wherein, the first disparity frame is a left-eye disparity frame and the second disparity frame is a right-eye disparity frame; or, the first disparity frame is a right-eye disparity frame and the second disparity frame is a left-eye disparity frame.

10. The method according to claim 9, characterized in that, Also includes: Based on the target white balance color temperature, determine the first duty cycle for the first group of light-emitting units and the second duty cycle for the second group of light-emitting units; The first light-emitting unit group is driven using the first duty cycle, and the second light-emitting unit group is driven using the second duty cycle.

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