3D display apparatus and display method

Abstract

PURPOSE: To provide a 3D display apparatus and a display method capable of providing an excellent 3D image display method.SOLUTION: The eye tracker of the 3D display tracks the left and right eye positions. The processor generates a plurality of fields of view. The plurality of light splitting units of the display of the 3D display apparatus distribute the plurality of light beams emitted by the plurality of light emitting units. The processor calculates aperture angles and optical paths of the plurality of light beams that are emitted by the plurality of light emitting units and pass through the plurality of light splitting units, to generate viewpoints through which the plurality of light beams pass. The processor performs light intensity comparison and post-processing for a field of view corresponding to at least one of the plurality of left-eye viewpoints and at least one of the plurality of right-eye viewpoints.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to display technology, and more particularly to a 3D display device and method. [Background technology]

[0002] Conventional naked-eye 3D display devices require a splitter to ensure that multiple pixels on the display have their own limited exit angles when displaying 3D images, and an algorithm is required to allow the left and right eyes to receive different parallax images. However, because pixel points may not be perfect point light sources, light misalignment is likely to occur, resulting in image crosstalk between the images seen by the left and right eyes, making the 3D image unclear and causing double images. Summary of the Invention [Problem to be solved by the invention]

[0003] The present invention provides a 3D display device and a display method that can provide an excellent 3D image display method. [Means for solving the problem]

[0004] According to one embodiment of the present invention, a 3D display device includes an eye tracking device, a processor, and a display. The eye tracking device is configured to track left and right eye positions. The processor is coupled to the eye tracking device and configured to calculate multiple left-eye viewpoints and multiple right-eye viewpoints based on the left and right eye positions and generate multiple fields of view. The display is coupled to the eye tracking device and the processor. The display includes multiple light-emitting units and multiple light-splitting units. The multiple light-emitting units are configured to emit multiple light beams. The multiple light-splitting units are configured to distribute the multiple light beams emitted by the multiple light-emitting units. The processor calculates aperture angles and optical paths of the multiple light beams emitted by the multiple light-emitting units and passing through the multiple light-splitting units to generate viewpoints through which the multiple light beams pass. At least one beam of the multiple light beams simultaneously passes through at least one of the multiple left-eye viewpoints and at least one of the multiple right-eye viewpoints. The processor performs light intensity comparison and post-processing on the fields of view corresponding to at least one of the multiple left-eye viewpoints and at least one of the multiple right-eye viewpoints.

[0005] According to one embodiment of the present invention, a display method includes the following processes: tracking a left eye position and a right eye position through an eye tracking device; calculating a plurality of left eye viewpoints and a plurality of right eye viewpoints based on the left eye position and the right eye position, and generating a plurality of fields of view; emitting a plurality of light beams through a plurality of light emitting units of a display; distributing the plurality of light beams emitted by the plurality of light emitting units through a plurality of light splitting units of the display; calculating aperture angles and optical paths of the plurality of light beams emitted by the plurality of light emitting units and passing through the plurality of light splitting units, to generate a field of view through which the plurality of light beams pass; at least one beam of the plurality of light beams simultaneously passes through at least one of the plurality of left eye viewpoints and at least one of the plurality of right eye viewpoints, and performing light intensity comparison and post-processing on the field of view corresponding to at least one of the plurality of left eye viewpoints and at least one of the plurality of right eye viewpoints. [Effects of the Invention]

[0006] As described above, the 3D display device and display method of the present invention can automatically adjust the light intensity of the field of view corresponding to at least one left-eye viewpoint or at least one right-eye viewpoint, thereby reducing image crosstalk.

[0007] In order to make the above features and advantages of the present invention easier to understand, embodiments accompanied with drawings are described in detail below. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a schematic diagram of a 3D display device according to one embodiment of the present invention; [Figure 2] 1 is a schematic diagram of a display structure according to one embodiment of the present invention; [Figure 3] 1 is a flowchart of a display method according to one embodiment of the present invention. [Figure 4] FIG. 2 is a schematic diagram illustrating a distribution of viewpoints according to one embodiment of the present invention. [Figure 5] FIG. 10 is a schematic diagram illustrating a distribution of viewpoints according to another embodiment of the present invention. [Figure 6] FIG. 10 is a schematic diagram illustrating a distribution of viewpoints according to another embodiment of the present invention. [Figure 7] FIG. 10 is a schematic diagram illustrating a distribution of viewpoints according to another embodiment of the present invention. [Figure 8] FIG. 10 is a schematic diagram illustrating a distribution of viewpoints according to another embodiment of the present invention. [Figure 9] FIG. 10 is a schematic diagram illustrating a distribution of viewpoints according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0009] DETAILED DESCRIPTION OF THE INVENTION Exemplary embodiments of the invention will now be described in detail with reference to example embodiments illustrated in the accompanying drawings. Wherever possible, the same reference numbers are used in the drawings and the description to refer to the same or like parts.

[0010] In the present specification and the appended claims, certain terms are used to refer to particular elements. As one skilled in the art will appreciate, display device manufacturers may refer to the same element by different names. The present invention does not intend to distinguish between elements that have the same function but different names. In the following specification and claims, terms such as "comprises" and "including" are open terms and should therefore be interpreted as "including, but not limited to."

[0011] In some embodiments of the present invention, unless otherwise defined, terms such as "coupled," "interconnected," and the like may mean that two structures are in direct contact, or that two structures are not in direct contact but have other structures between them. Furthermore, the terms "joined" and "connected" can include situations in which both structures are movable or both structures are fixed. Additionally, the term "couple" includes all direct and indirect means of electrical connection.

[0012] The ordinal numbers such as "first" and "second" used in the specification and claims of the present invention are used to modify components and do not mean or represent that the components are numbered sequentially, nor do they imply the order of a component relative to another component or the order of a manufacturing method. These ordinal numbers are used only to clearly distinguish a component having a certain name from another component having the same name. The same expression may not be used in the claims and the specification. Therefore, a first component in the specification may be a second component in the claims. It should be understood that in the following embodiments, technical features in several different embodiments may be substituted, rearranged, and mixed to complete other embodiments without departing from the spirit of the present invention.

[0013] The display device described in the present invention may include, but is not limited to, a virtual reality device, an augmented reality device, a head-up display module, a transparent display module, a sensing device, or a splicing device. The display module may be a bendable or flexible electronic device. The display device may be a non-emissive display module or an emissive display module. The sensing device may be a sensing device for sensing capacitance, light, thermal energy, or ultrasound, but is not limited thereto. The display device may include electronic components such as passive and active components, for example, capacitors, resistors, inductors, diodes, transistors, etc. The diode may include a light-emitting diode or a photodiode. The light-emitting diode may include, but is not limited to, an inorganic light-emitting diode, an organic light-emitting diode (OLED), a mini LED, a micro LED, or a quantum dot LED, for example. The splicing device may be, but is not limited thereto, a display splicing device. It should be noted that the display device may be any combination of the above, but is not limited thereto.

[0014] It should be understood that technical features in the different embodiments may be substituted, rearranged, and mixed to complete other embodiments without departing from the spirit of the present invention.

[0015] FIG. 1 is a schematic diagram of a 3D display device according to one embodiment of the present invention. Referring to FIG. 1, the 3D display device 100 includes a processor 110, an eye-tracking device 120, and a display 130. The processor 110 is coupled to the eye-tracking device 120 and the display 130. In this embodiment, the 3D display device 100 may be a naked-eye 3D image display device with a 3D image display function, but the present invention is not limited thereto. In this embodiment, the display 130 can display 3D images, and the eye-tracking device 120 tracks the positions of the user's left and right eyes to calculate multiple left-eye and multiple right-eye viewpoints on a viewing plane, generate multiple views, and display the multiple left-eye and multiple right-eye viewpoints.

[0016] In this embodiment, processor 110 may include, for example, a central processing unit (CPU), a graphics processing unit (GPU), or other programmable general-purpose or special-purpose microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), other similar processing circuitry, or a combination of these devices.

[0017] In this embodiment, the eye tracking device 120 may include an image sensing element with depth sensing capabilities, and may be configured to determine the left and right eyes of a user, and identify the left eye position and right eye position of the user in space.

[0018] In this embodiment, the display 130 may include, for example, liquid crystal or light-emitting diodes. The light-emitting diodes may include, for example, organic light-emitting diodes (OLEDs), mini LEDs, micro LEDs, quantum dot (QD) LEDs, fluorescent materials, phosphors, or other suitable materials, which may be arranged and combined in any manner, but the present invention is not limited thereto.

[0019] FIG. 2 is a schematic diagram of a display structure according to one embodiment of the present invention. A partial schematic diagram of a display 130 will now be described with reference to FIGS. 1 and 2. In this embodiment, the display 130 of FIG. 1 may include a plurality of light-emitting units 210_1 to 210_N and a plurality of light-splitting units 220_1 to 220_3, as shown in FIG. 2, where N is a positive integer. The display surface of the display 130 may be parallel to a plane formed by the extending directions D1 and D2, respectively, and may display a 3D image toward the direction D3. The directions D1 to D3 are perpendicular to each other. A user can view the display 130 in a direction opposite to the direction D3. As shown in FIG. 2, a distance Vd may exist between the user's left eye 201 and right eye 202 and the display surface of the display 130. In this embodiment, the light-emitting units 210_1 to 210_N correspond to a plurality of display pixels and may be configured to emit a plurality of light beams. The light splitting units 220_1 to 220_3 may be a plurality of lenses and are configured to split a plurality of light beams emitted by at least some of the light emitting units 210_1 to 210_N.

[0020] 2, the multiple light beams shown by the solid lines may be incident on the user's left eye 201 and right eye 202 separately, or may not be within the viewing range of the user's left eye 201 and right eye 202, and therefore typically have low image crosstalk. Conversely, the multiple light beams shown by the dotted lines may be incident on the user's left eye 201 and right eye 202, respectively, and therefore have higher image crosstalk. Additionally, the impact of image crosstalk may change as the positions of the user's left eye 201 and right eye 202 or the distance Vd from the display surface of the display 130 change.

[0021] FIG. 3 is a flowchart of a display method according to an embodiment of the present invention. Referring to FIGS. 1 and 3, the 3D display device 100 can execute the following steps S310 to S360. In step S310, the processor 110 can track the left eye position and the right eye position via the eye tracking device 120. In step S320, the processor 110 can calculate a plurality of left eye viewpoints P_1 to P_M and a plurality of right eye viewpoints P_(M+1) to P_K based on the left eye position and the right eye position, thereby generating a plurality of fields of view. In this embodiment, the processor 110 can detect the user's left eye 201 and right eye 202 via the eye tracking device 120, and the processor 110 can calculate a plurality of left eye viewpoints P_1 to P_M and a plurality of right eye viewpoints P_(M+1) to P_K based on the left eye position of the left eye 201 and the right eye position of the right eye 202, thereby generating a plurality of fields of view. 2, the central reference line B2 of the left eye viewpoints P_1 to P_M and the right eye viewpoints P_(M+1) to P_K can be determined by taking the midline between the positions of the user's left eye 201 and right eye 202. The boundary B1 of the left eye viewpoints P_1 to P_M and the boundary B2 of the right eye viewpoints P_(M+1) to P_K can be determined by the aperture angle and optical path of the light splitting unit 220_2.

[0022] In step S330, the processor 110 can emit multiple light beams through the light-emitting units 210_1 to 210_N of the display 130. In step S340, the light splitting units 220_1 to 220_3 of the display 130 distribute the multiple light beams emitted by the light-emitting units 210_1 to 210_N. In step S350, the processor 110 can calculate aperture angles and optical paths of the multiple light beams emitted by the light-emitting units 210_1 to 210_N and passing through the light splitting units 220_1 to 220_3 to generate viewpoints through which the multiple light beams pass. Here, at least one beam of the multiple light beams simultaneously passes through at least one of the left-eye viewpoints P_1 to P_M and at least one of the right-eye viewpoints P_(M+1) to P_K. In this embodiment, taking the light splitting unit 220_2 as an example, the processor 110 can first calculate the aperture angles and optical paths of multiple light beams emitted from at least some of the light-emitting units 210_1 to 210_N and passing through the light splitting unit 220_2 to generate viewpoints through which the multiple light beams pass. In this embodiment, at least one of the multiple light beams can simultaneously pass through at least one of the left-eye viewpoints P_1 to P_M and at least one of the right-eye viewpoints P_(M+1) to P_K. That is, the user's left eye 201 and right eye 202 can view an image with crosstalk.

[0023] In step S360, light intensity comparison and post-processing are performed for fields of view corresponding to at least one of the plurality of left-eye viewpoints and at least one of the plurality of right-eye viewpoints. In this embodiment, the processor 110 of this embodiment performs light intensity comparison and post-processing for fields of view corresponding to at least one of the left-eye viewpoints P_1 to P_M and at least one of the right-eye viewpoints P_(M+1) to P_K, so as to effectively alleviate the problem of image crosstalk. In this regard, a specific implementation method for performing light intensity comparison and post-processing for fields of view will be described in detail in the following embodiments.

[0024] FIG. 4 is a schematic diagram illustrating a distribution of viewpoints according to one embodiment of the present invention. Referring to FIGS. 1 and 4, in this embodiment, the processor 110 can calculate a plurality of left-eye viewpoints P1-P9 and a plurality of right-eye viewpoints P10-P18 based on the left eye position of the left eye 401 and the right eye position of the right eye 402. As shown in FIG. 4, a central reference line B2 of the left-eye viewpoints P1-P9 and the right-eye viewpoints P10-P18 can be determined by taking the midline between the positions of the user's left eye 401 and right eye 402. A boundary B1 of the left-eye viewpoints P1-P9 and a boundary B2 of the right-eye viewpoints P10-P18 can be determined by the aperture angle and optical path of the corresponding light splitting unit.

[0025] In this embodiment, the left eye viewpoints P1 to P9 and the right eye viewpoints P10 to P18 may be uniformly distributed on a reference line Lf parallel to the field of view plane. In this embodiment, the processor 110 may select a left standard viewpoint from at least one of the left eye viewpoints P1 to P9, where the left standard viewpoint may correspond to the light intensity of the left standard field of view. Furthermore, the processor 110 may select a right standard viewpoint from at least one of the right eye viewpoints P10 to P18, where the right standard viewpoint corresponds to the light intensity of the right standard field of view. In this embodiment, the processor 110 may perform light intensity comparison and post-processing on the fields of view corresponding to at least one of the left eye viewpoints P1 to P9 and at least one of the right eye viewpoints P10 to P18 based on the following formulas (1) and (2):

[0026]

number

[0027] In the above formulas (1) and (2), Rv' is the light intensity of the field of view corresponding to any one of the right-eye viewpoints P10 to P18 for performing comparison and post-processing, Rv is the light intensity of the field of view corresponding to any one of the right-eye viewpoints P10 to P18, Ls is the light intensity of the left standard field of view corresponding to the left standard viewpoint, Ra is the first ratio value, Lv' is the light intensity of the field of view corresponding to any one of the left-eye viewpoints P1 to P9 for performing comparison and post-processing, Lv is the light intensity of the field of view corresponding to any one of the left-eye viewpoints P1 to P9, Rs is the light intensity of the right standard field of view corresponding to the right standard viewpoint, and La is the second ratio value. In this embodiment, the first ratio value is proportional to the right-eye crosstalk rate, and the second ratio value is proportional to the left-eye crosstalk rate.

[0028] In this embodiment, the processor 110 first defines a high crosstalk region and a low crosstalk region based on the left eye position of the left eye 401 and the right eye position of the right eye 402, and can then perform light intensity comparison and post-processing on the field of view corresponding to the high crosstalk region. Specifically, the processor 110 first calculates multiple crosstalk ratios of the multiple light beams emitted by the multiple light-emitting units of the display 130, and can define a viewing region corresponding to a portion of the multiple crosstalk ratios that is equal to or greater than a first crosstalk ratio threshold and equal to or less than a second crosstalk ratio threshold as a high crosstalk region, and can define a viewing region corresponding to a portion of the multiple crosstalk ratios that is less than the first crosstalk ratio threshold and greater than the second crosstalk ratio threshold as a low crosstalk region. In one embodiment, the first crosstalk ratio threshold may be, for example, 5%, and the second crosstalk ratio threshold may be, for example, 95%, although the present invention is not limited thereto.

[0029] In this regard, as shown in FIG. 4 , region L2 corresponding to the pupil range of left eye 401 may be a low-crosstalk region, and regions L1 and L3 on either side of the pupil range of left eye 401 may be high-crosstalk regions. Region R2 corresponding to the pupil range of right eye 402 may be a low-crosstalk region, and regions R1 and R3 on either side of the pupil range of right eye 402 may be high-crosstalk regions. However, the range definitions of high-crosstalk regions and low-crosstalk regions of the present invention are not limited thereto. In this embodiment, processor 110 may perform light intensity comparison and post-processing on fields of view corresponding to at least one of the multiple left-eye viewpoints and at least one of the multiple right-eye viewpoints within the high-crosstalk region.

[0030] It should be noted that in one embodiment, when the high crosstalk region is located between the left eye center and the right eye center and two or more viewpoints are located in the high crosstalk region, the first ratio values ​​corresponding to different right eye viewpoints decrease as they approach the right eye position, and the second ratio values ​​corresponding to different left eye viewpoints decrease as they approach the left eye position. Furthermore, when the high crosstalk region is located outside the pair of eyes and two or more viewpoints are located in the high crosstalk region, the first ratio values ​​corresponding to different right eye viewpoints decrease as they approach the right eye position, and the second ratio values ​​corresponding to different left eye viewpoints decrease as they approach the left eye position. In other words, viewpoints closer to the pupil range have smaller crosstalk ratios and therefore lower ratio values. For example, viewpoint P7 corresponds to a ratio value of 5%, viewpoint P8 corresponds to a ratio value of 10%, viewpoint P9 corresponds to a ratio value of 20%, viewpoint P10 corresponds to a ratio value of 20%, and viewpoint P11 corresponds to a ratio value of 10%. Viewpoint P12 corresponds to a ratio value of 5%, for example. As another example, viewpoint P1 corresponds to a ratio value of 20%, for example. Viewpoint P2 corresponds to a ratio value of 10%, for example. Viewpoint P3 corresponds to a ratio value of 5%, for example. Viewpoint P16 corresponds to a ratio value of 5%, for example. Viewpoint P17 corresponds to a ratio value of 10%, for example. Viewpoint P18 corresponds to a ratio value of 20%, for example. However, the numerical definitions of the ratio values ​​of the present invention are not limited thereto. In another embodiment, different right-eye viewpoints may correspond to the same first ratio value, and different left-eye viewpoints may correspond to the same second ratio value.

[0031] In this embodiment, the processor 110 compares the region L3 and the region R1 having high crosstalk, and can adjust the light intensity of a field of view corresponding to a viewpoint of at least one of the region L3 and the region R1 based on the above formulas (1) and (2). For example, the viewpoint P7 corresponds to a field of view having a light intensity of 128 (i.e., a brightness value or a gray scale value). The viewpoint P8 corresponds to a field of view having a light intensity of 255. The viewpoint P9 corresponds to a field of view having a light intensity of 54. The viewpoint P10 corresponds to a field of view having a light intensity of 255. The viewpoint P11 corresponds to a field of view having a light intensity of 128. The viewpoint P12 corresponds to a field of view having a light intensity of 64. The processor 110 can select the viewpoint P8 as the left standard viewpoint and the viewpoint P12 as the right standard viewpoint.

[0032] For example, assume that all viewpoints correspond to the same ratio value of 0.5 (i.e., 50%). For viewpoint P7, the processor 110 can subtract the light intensity of viewpoint P7 (128) from the light intensity of viewpoint P12 (right standard viewpoint) (64) based on the above formula (2), take the absolute value to obtain the value "64", and then multiply the value "64" by the ratio value of 0.5 to obtain the value "32". Therefore, the light intensity of viewpoint P7 after processing is "96" (i.e., =128-32).

[0033] For viewpoint P8, the processor 110 can subtract the light intensity of viewpoint P8, 255, from the light intensity of viewpoint P12 (right standard viewpoint), 64, based on the above formula (2), take the absolute value to obtain the value "191", and then multiply the value "191" by the ratio value 0.5 to obtain the value "96" (this is the result of rounding 95.5 because the brightness value has no decimal points). Therefore, the light intensity of viewpoint P8 after processing is "159" (i.e., =255-96).

[0034] For viewpoint P9, the processor 110 can subtract the light intensity 54 of viewpoint P9 from the light intensity 64 of viewpoint P12 (right standard viewpoint) based on the above formula (2), take the absolute value to obtain the value "10", and then multiply the value "10" by the ratio value 0.5 to obtain the value "5". Therefore, the light intensity of viewpoint P9 after processing is "49" (i.e., =54-5).

[0035] For viewpoint P10, the processor 110 can subtract the light intensity 255 of viewpoint P10 from the light intensity 255 of viewpoint P8 (left standard viewpoint) based on the above formula (1), and take the absolute value to obtain the value "0". Therefore, the light intensity of viewpoint P10 remains 255.

[0036] For viewpoint P11, the processor 110 can subtract the light intensity of viewpoint P11, 128, from the light intensity of viewpoint P8 (left standard viewpoint), 255, based on the above formula (1), take the absolute value to obtain "127", and then multiply the value "127" by the ratio value 0.5 to obtain the value "64" (i.e., the result of rounding up or down 63.5). Therefore, the light intensity of viewpoint P11 after processing is "64" (i.e., =128-64).

[0037] For viewpoint P12, the processor 110 can subtract the light intensity of viewpoint P12, 64, from the light intensity of viewpoint P8 (left standard viewpoint), 255, based on the above formula (1), take the absolute value to obtain the value "191", and then multiply the value "191" by the ratio value 0.5 to obtain the value "96" (i.e., the result of rounding 95.5). Therefore, the light intensity of viewpoint P12 after processing becomes "0" (because the minimum luminance value is 0).

[0038] In this way, the processor 110 can appropriately reduce the light intensity of the fields of view corresponding to multiple viewpoints in the high crosstalk region L3 and region R1, thereby effectively reducing the impact of crosstalk.

[0039] However, in one embodiment, light intensity comparison and post-processing are performed on images corresponding to at least one of the left eye viewpoints P1-P9 and at least one of the right eye viewpoints P10-P18 based on the following mathematical formulas (1) and (2):

[0040]

number

[0041] In the above formulas (1) and (2), Rv' is the light intensity of the field of view corresponding to any one of the right-eye viewpoints P10 to P18 for performing comparison and post-processing, Rv is the light intensity of the field of view corresponding to any one of the right-eye viewpoints P10 to P18, Ls is the light intensity of the left standard field of view corresponding to the left standard viewpoint, Ra is the first ratio value, Lv' is the light intensity of the field of view corresponding to any one of the left-eye viewpoints P1 to P9 for performing comparison and post-processing, Lv is the light intensity of the field of view corresponding to any one of the left-eye viewpoints P1 to P9, Rs is the light intensity of the right standard field of view corresponding to the right standard viewpoint, and La is the second ratio value. In this embodiment, the first ratio value is proportional to the right-eye crosstalk rate, and the second ratio value is proportional to the left-eye crosstalk rate. When the value of the light intensity (Rv') after comparison and post-processing of the field of view corresponding to any one of the right eye viewpoints P10 to P18 is less than a first threshold, the processor 110 maintains the original light intensity of the field of view corresponding to any one of the right eye viewpoints P10 to P18. Furthermore, when the value of the light intensity (Lv') after comparison and post-processing of the field of view corresponding to any one of the left eye viewpoints P1 to P9 is less than a second threshold, the processor 110 maintains the original light intensity of the field of view corresponding to any one of the left eye viewpoints P1 to P9.

[0042] It should be noted that the first threshold value and the second threshold value may be the minimum value of the currently compared light intensity and the standard light intensity, but the present invention is not limited thereto. In one embodiment, the first threshold value and the second threshold value may be other default values.

[0043] To further illustrate using the above example, for viewpoint P7, processor 110 can subtract the light intensity of viewpoint P7, 128, from the light intensity of viewpoint P12 (right standard viewpoint), 64, based on the above formula (2), take the absolute value to obtain the value "64", and then multiply the value "64" by a ratio value of 0.5 to obtain the value "32". Therefore, the light intensity of viewpoint P7 after processing is "96" (i.e., =128-32).

[0044] For viewpoint P8, processor 110 can subtract the light intensity of viewpoint P8, 255, from the light intensity of viewpoint P12 (right standard viewpoint), 64, based on the above formula (2), take the absolute value to obtain the value "191", and then multiply the value "191" by the ratio value 0.5 to obtain the value "96" (this is the result of rounding 95.5 because the brightness value has no decimal points). Therefore, the light intensity of viewpoint P8 after processing is "159" (i.e., =255-96).

[0045] For viewpoint P9, the processor 110 may perform subtraction between the light intensity 54 of viewpoint P9 and the light intensity 64 of viewpoint P12 (right standard viewpoint) based on the above formula (2), take the absolute value to obtain a value of "10", and then multiply the value "10" by a ratio value of 0.5 to obtain a value of "5". Therefore, the light intensity of viewpoint P9 after processing is "49" (i.e., 49 = 54 - 5). In this regard, since the value "49" is smaller than the light intensity 54 of viewpoint P9 (the second threshold), the processor 110 maintains the light intensity of viewpoint P9 (since the light intensity 54 of viewpoint P9 is smaller than the light intensity of viewpoint P9 at the right standard viewpoint, the second threshold is the light intensity value of viewpoint P9).

[0046] For viewpoint P10, the processor 110 can subtract the light intensity 255 of viewpoint P10 from the light intensity 255 of viewpoint P8 (left standard viewpoint) based on the above formula (1), and take the absolute value to obtain the value "0". Therefore, the light intensity of viewpoint P10 remains 255.

[0047] For viewpoint P11, the processor 110 may perform subtraction between the light intensity 128 of viewpoint P11 and the light intensity 255 of viewpoint P8 (left standard viewpoint) based on the above formula (1), take the absolute value to obtain a value "127", and then multiply the value "127" by a ratio value of 0.5 to obtain a value "64" (this is the result of rounding 63.5 because the luminance value has no decimal points). Therefore, the light intensity of viewpoint P9 after processing is "64" (i.e., 64 = 128 - 64). In this regard, since the value "64" is smaller than the light intensity 128 of viewpoint P11 (the first threshold), the processor 110 maintains the light intensity of viewpoint P11 (because the light intensity 128 of viewpoint P11 is smaller than the light intensity of viewpoint P11 at the left standard viewpoint, the first threshold is the light intensity value of viewpoint P11).

[0048] For the viewpoint P12, the processor 110 can subtract the light intensity of the viewpoint P12, 64, from the light intensity of the viewpoint P8 (left standard viewpoint), 255, based on the above formula (1), take the absolute value to obtain the value "191", and then multiply the value "191" by the ratio value 0.5 to obtain the value "96" (i.e., the result of rounding up or down 95.5). Therefore, the light intensity of the viewpoint P12 after processing is "-32" (i.e., -32 = 64 - 96). In this regard, since the value "-32" is smaller than the light intensity of the viewpoint P12, 128 (first threshold), the processor 110 maintains the light intensity of the viewpoint P12.

[0049] In this way, the processor 110 can appropriately reduce the light intensity of the fields of view corresponding to multiple viewpoints in the high crosstalk region L3 and region R1, thereby effectively reducing the impact of crosstalk.

[0050] In another embodiment of the present invention, the processor 110 can also compare the high crosstalk region L1 and region R3, and adjust the light intensity of the field of view corresponding to the viewpoint of at least one of region L1 and region R3 based on the above formula (1) and formula (2). The method for adjusting the light intensity of the field of view corresponding to the viewpoint of region L1 and region R3 can be inferred from the above example, and therefore a detailed description thereof will be omitted here.

[0051] FIG. 5 is a schematic diagram illustrating a distribution of viewpoints according to another embodiment of the present invention. Referring to FIGS. 1 and 5, in one embodiment, left-eye viewpoints P1-P9 and right-eye viewpoints P10-P18 may be non-uniformly distributed on a reference line Lf parallel to the field of view plane. In this regard, the left-eye viewpoints P1-P3 and P7-P9 may be close to the pupil region of the left eye 401, thereby reducing the ghost effect of the image viewed by the left eye 401. The right-eye viewpoints P10-P12 and P16-P18 may be close to the pupil region of the right eye 402, thereby reducing the ghost effect of the image viewed by the right eye 402. Furthermore, the processor 110 may also perform light intensity comparison and processing for the left-eye viewpoints P1-P9 and right-eye viewpoints P10-P18 of FIG. 5, as described in the embodiment of FIG. 4, thereby effectively improving the image crosstalk viewed by the left eye 401 and the right eye 402.

[0052] FIG. 6 is a schematic diagram illustrating a distribution of viewpoints according to another embodiment of the present invention. Referring to FIGS. 1 and 6, in one embodiment, left-eye viewpoints P1-P7 and right-eye viewpoints P8-P14 are distributed on a reference line Lf parallel to the field of view plane. Furthermore, the number of viewpoints in region L3 (high crosstalk region) is greater than the number of viewpoints in region L1 (high crosstalk region). The number of viewpoints in region R1 (high crosstalk region) is greater than the number of viewpoints in region R3 (high crosstalk region). In this regard, processor 110 can also perform light intensity comparison and processing on left-eye viewpoints P1, P5-P7 and right-eye viewpoints P8-P10, P14 in FIG. 6, as described in the embodiment of FIG. 4, thereby effectively improving the image crosstalk seen by left eye 401 and right eye 402.

[0053] FIG. 7 is a schematic diagram illustrating a distribution of viewpoints according to another embodiment of the present invention. Referring to FIGS. 1 and 7, in one embodiment, left-eye viewpoints P1-P5 and right-eye viewpoints P6-P10 are distributed on a reference line Lf parallel to the field of view plane. The number of viewpoints in region L1 (high crosstalk region) is equal to the number of viewpoints in region R3 (high crosstalk region). The number of viewpoints in region L3 (high crosstalk region) is equal to the number of viewpoints in region R1 (high crosstalk region). In this regard, processor 110 can also perform light intensity comparison and processing for left-eye viewpoints P1 and P5 and right-eye viewpoints P9 and P10 in FIG. 7, as described in the embodiment of FIG. 4, thereby effectively improving the image crosstalk seen by left eye 401 and right eye 402.

[0054] FIG. 8 is a schematic diagram illustrating a distribution of viewpoints according to another embodiment of the present invention. Referring to FIGS. 1 and 7, in one embodiment, left-eye viewpoints P1-P3, a central viewpoint P4, and right-eye viewpoints P5-P7 are distributed on a reference line Lf parallel to the field of view plane. The number of viewpoints in region L1 (high crosstalk region) is equal to the number of viewpoints in region R3 (high crosstalk region). The number of viewpoints in region L3 (high crosstalk region) is equal to the number of viewpoints in region R1 (high crosstalk region). In this regard, processor 110 can also perform light intensity comparison and processing for left-eye viewpoints P1 and P3 and right-eye viewpoints P5 and P7 in FIG. 8, as described in the embodiment of FIG. 4, thereby effectively improving image crosstalk seen by left eye 401 and right eye 402. However, with respect to central viewpoint P4, processor 110 may regard central viewpoint P4 as either a right-eye viewpoint or a left-eye viewpoint and process it accordingly.

[0055] FIG. 9 is a schematic diagram illustrating a distribution of viewpoints according to another embodiment of the present invention. Referring to FIGS. 1 and 9, in one embodiment, left-eye viewpoints P1-P7 and right-eye viewpoints P8-P14 are distributed on a reference line Lf parallel to the field of view plane. Furthermore, the number of viewpoints in region L1 (high crosstalk region) is greater than the number of viewpoints in region L3 (high crosstalk region). The number of viewpoints in region R3 (high crosstalk region) is greater than the number of viewpoints in region R1 (high crosstalk region). In this regard, processor 110 can also perform light intensity comparison and processing on left-eye viewpoints P1-P3, P7 and right-eye viewpoints P8, P12-P14 in FIG. 9 as described in the embodiment of FIG. 4, thereby effectively improving the image crosstalk seen by left eye 401 and right eye 402.

[0056] In some embodiments of the present invention, when a reference pattern is input after removing the light dividing unit (lens layer) from the display, it is possible to determine whether the distribution result of the corresponding viewpoint is consistent with the distribution method described in the above embodiments of the present invention by simply calculating the number of boundaries of the pattern displayed on the display.

[0057] In some embodiments of the present invention, grayscale values ​​from 0 to 255 can be input sequentially for all viewpoints within the high crosstalk region of the display. If there are any values ​​that remain unchanged after adjustment, they are the light intensities for the right and left standard viewpoints described in the above embodiments. Next, using the unchanged light intensities for the right and left standard viewpoints, images with different luminances are input to the display to generate multiple corresponding light intensities. By substituting these into the above equations (1) and (2), multiple equations such as the above equations (1) and (2) can be obtained. Therefore, these multiple equations can be solved by simultaneous calculation to obtain corresponding ratio values, which can be consistent with the light intensity adjustment means described in the above embodiments.

[0058] As described above, the 3D display device and display method disclosed in the present invention can define high crosstalk regions and low crosstalk regions in a viewing plane, and automatically reduce the light intensity of at least one of at least one left eye viewpoint and at least one right eye viewpoint by comparing the light intensity of at least one of the at least one left eye viewpoint and at least one right eye viewpoint in the high crosstalk region with the light intensity of the corresponding standard viewpoint, thereby effectively reducing the image crosstalk of at least one of the left eye and right eye.

[0059] Finally, it should be explained that the above embodiments are merely used to describe the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art will understand that the technical solutions described in the above embodiments can be modified or some or all of the technical features can be replaced with equivalents, and such modification or replacement of the corresponding technical solutions will not substantially depart from the scope of the embodiments of the present invention. [Industrial Applicability]

[0060] The 3D display device and display method of the present invention can be applied to display devices.

Explanation of Signs

[0061] 100 3D display device 110 Processor 120 Eye tracking device 130 Display 201, 401 Left eye 202, 402 Right eye 210_1~210_N Light emitting unit 220_1, 220_2, 220_3 Optical splitting unit D1, D2, D3 Directions B1, B2, B3 Boundaries P_1~P_M, P_(M+1)~P_K, P1~P18 Viewpoints L1~L3, R1~R3 Regions Lf Reference line S310~S360 Steps

Claims

1. an eye tracking device configured to track left and right eye positions; a processor coupled to the eye tracking device and configured to calculate a plurality of left-eye viewpoints and a plurality of right-eye viewpoints based on the left eye positions and the right eye positions to generate a plurality of fields of view; a device coupled to the eye tracking device and the processor; a plurality of light emitting units configured to emit a plurality of light beams; a plurality of light splitting units configured to split the plurality of light beams emitted by the plurality of light emitting units; a display including: wherein the processor calculates aperture angles and optical paths of the plurality of light beams emitted by the plurality of light-emitting units and passing through the plurality of light splitting units to generate viewpoints through which the plurality of light beams pass; at least one beam of the plurality of light beams simultaneously passes through at least one of the plurality of left-eye viewpoints and at least one of the plurality of right-eye viewpoints; The 3D display device wherein the processor performs light intensity comparison and post-processing for fields of view corresponding to the at least one of the plurality of left-eye viewpoints and the at least one of the plurality of right-eye viewpoints.

2. the processor selects a left standard viewpoint from the at least one of the plurality of left-eye viewpoints, the left standard viewpoint corresponding to a light intensity of a left standard field of view; the processor selects a right standard viewpoint from the at least one of the plurality of right-eye viewpoints, the right standard viewpoint corresponding to a light intensity of a right standard field of view; the processor performs light intensity comparison and post-processing on fields of view corresponding to the at least one of the plurality of left-eye viewpoints and the at least one of the plurality of right-eye viewpoints based on the following formulas (1) and (2): 3D display device according to claim 1, wherein Rv' is the light intensity of a field of view corresponding to any one of the plurality of right-eye viewpoints for performing comparison and post-processing, Rv is the light intensity of a field of view corresponding to any one of the plurality of right-eye viewpoints, Ls is the light intensity of the left standard field of view corresponding to the left standard viewpoint, Ra is a first ratio value, Lv' is the light intensity of a field of view corresponding to any one of the plurality of left-eye viewpoints for performing comparison and post-processing, Lv is the light intensity of a field of view corresponding to any one of the plurality of left-eye viewpoints, Rs is the light intensity of the right standard field of view corresponding to the right standard viewpoint, and La is a second ratio value.

3. When a value obtained by subtracting the light intensity of the field of view corresponding to any one of the plurality of right-eye viewpoints from the light intensity of the left standard field of view corresponding to the left standard viewpoint and taking the absolute value is less than a first threshold, the processor maintains the light intensity of the field of view corresponding to any one of the plurality of right-eye viewpoints; 3. The 3D display device of claim 2, wherein when a value obtained by subtracting the light intensity of the field of view corresponding to any one of the plurality of left eye viewpoints from the light intensity of the right standard field of view corresponding to the right standard viewpoint and taking the absolute value is less than a second threshold, the processor maintains the light intensity of the field of view corresponding to any one of the plurality of left eye viewpoints.

4. The 3D display device according to claim 2 , wherein the first ratio value is proportional to a right-eye crosstalk ratio, and the second ratio value is proportional to a left-eye crosstalk ratio.

5. the processor calculates a plurality of crosstalk ratios in the plurality of beams of light based on the left eye position and the right eye position, and defines a viewpoint region corresponding to a portion of the plurality of crosstalk ratios that is equal to or greater than a first crosstalk ratio threshold and is equal to or less than a second crosstalk ratio threshold as a high crosstalk region, and defines a viewpoint region corresponding to a portion of the plurality of crosstalk ratios that is less than the first crosstalk ratio threshold and greater than the second crosstalk ratio threshold as a low crosstalk region; The 3D display device of claim 2 , wherein the processor performs light intensity comparison and post-processing for fields of view corresponding to the at least one of the plurality of left-eye viewpoints and the at least one of the plurality of right-eye viewpoints in the high crosstalk region.

6. 6. The 3D display device of claim 5, wherein when the high crosstalk region is located between a left eye center and a right eye center and two or more viewpoints are located in the high crosstalk region, a plurality of first ratio values ​​corresponding to different right eye viewpoints decrease as one approaches the right eye position, and a plurality of second ratio values ​​corresponding to different left eye viewpoints decrease as one approaches the left eye position.

7. 6. The 3D display device of claim 5, wherein when the high crosstalk region is located outside a pair of eyes and two or more viewpoints are located in the high crosstalk region, a first ratio value corresponding to a different right eye viewpoint decreases as the user approaches the right eye position, and a second ratio value corresponding to a different left eye viewpoint decreases as the user approaches the left eye position.

8. The 3D display device according to claim 1 , wherein the plurality of left-eye viewpoints and the plurality of right-eye viewpoints are distributed non-uniformly on a reference line.

9. 2. The 3D display device according to claim 1, wherein the number of the plurality of left eye viewpoints and the plurality of right eye viewpoints between the left eye position and the right eye position is greater than or equal to the number located outside the left eye position and the right eye position.

10. The 3D display device according to claim 1 , wherein the 3D display device is a naked-eye 3D image display device.

11. A display method applied to a 3D display device, the 3D display device including an eye tracking device and a display, the display method comprising: tracking a left eye position and a right eye position via the eye tracking device; calculating a plurality of left-eye viewpoints and a plurality of right-eye viewpoints based on the left-eye positions and the right-eye positions to generate a plurality of views; emitting a plurality of light beams through a plurality of light-emitting units of the display; distributing a plurality of light beams emitted by the plurality of light-emitting units through a plurality of light-splitting units of the display; calculating aperture angles and optical paths of the plurality of light beams emitted by the plurality of light emitting units and passing through the plurality of light splitting units to generate viewpoints through which the plurality of light beams pass, and at least one beam of the plurality of light beams simultaneously passes through at least one of the plurality of left-eye viewpoints and at least one of the plurality of right-eye viewpoints; performing light intensity comparison and post-processing on fields of view corresponding to the at least one of the plurality of left-eye viewpoints and the at least one of the plurality of right-eye viewpoints; Display methods including.

12. performing light intensity comparison and post-processing on fields of view corresponding to the at least one of the plurality of left-eye viewpoints and the at least one of the plurality of right-eye viewpoints; selecting a left standard viewpoint from the at least one of the plurality of left-eye viewpoints, the left standard viewpoint corresponding to a light intensity of a left standard field of view; selecting a right standard viewpoint from the at least one of the plurality of right-eye viewpoints, the right standard viewpoint corresponding to a light intensity of a right standard field of view; performing light intensity comparison and post-processing on fields of view corresponding to the at least one of the plurality of left-eye viewpoints and the at least one of the plurality of right-eye viewpoints based on the following formulas (1) and (2):

12. The display method according to claim 11, comprising: Rv' is the light intensity of a field of view corresponding to any one of the plurality of right-eye viewpoints for performing comparison and post-processing; Rv is the light intensity of a field of view corresponding to any one of the plurality of right-eye viewpoints; Ls is the light intensity of the left standard field of view corresponding to the left standard viewpoint; Ra is a first ratio value; Lv' is the light intensity of a field of view corresponding to any one of the plurality of left-eye viewpoints for performing comparison and post-processing; Lv is the light intensity of a field of view corresponding to any one of the plurality of left-eye viewpoints; Rs is the light intensity of the right standard field of view corresponding to the right standard viewpoint; and La is a second ratio value.

13. performing light intensity comparison and post-processing on fields of view corresponding to the at least one of the plurality of left-eye viewpoints and the at least one of the plurality of right-eye viewpoints; a step of performing a subtraction between the light intensity of the field of view corresponding to any one of the plurality of right-eye viewpoints and the light intensity of the left standard field of view corresponding to the left standard viewpoint, and when a value obtained by taking an absolute value is less than a first threshold, maintaining the light intensity of the field of view corresponding to any one of the plurality of right-eye viewpoints; a step of performing a subtraction between the light intensity of the field of view corresponding to any one of the plurality of left-eye viewpoints and the light intensity of the right standard field of view corresponding to the right standard viewpoint, and when the value obtained by taking the absolute value is less than a second threshold, maintaining the light intensity of the field of view corresponding to any one of the plurality of left-eye viewpoints; The display method of claim 12, comprising:

14. 13. The display method of claim 12, wherein the first ratio value is proportional to a right-eye crosstalk ratio and the second ratio value is proportional to a left-eye crosstalk ratio.

15. performing light intensity comparison and post-processing on fields of view corresponding to the at least one of the plurality of left-eye viewpoints and the at least one of the plurality of right-eye viewpoints; calculating a plurality of crosstalk ratios in the plurality of beams of light based on the left eye position and the right eye position, and defining a viewpoint region corresponding to a portion of the plurality of crosstalk ratios that is equal to or greater than a first crosstalk ratio threshold and equal to or less than a second crosstalk ratio threshold as a high crosstalk region; defining a viewpoint region corresponding to a portion of the plurality of crosstalk ratios that is less than the first crosstalk ratio threshold and greater than the second crosstalk ratio threshold as a low crosstalk region; performing light intensity comparison and post-processing on fields of view corresponding to the at least one of the plurality of left-eye viewpoints and the at least one of the plurality of right-eye viewpoints in the high crosstalk region; The display method of claim 12, comprising:

16. The display method of claim 15, wherein when the high crosstalk area is located between the left eye center and the right eye center and two or more viewpoints are located in the high crosstalk area, multiple first ratio values ​​corresponding to different right eye viewpoints decrease as they approach the right eye position, and multiple second ratio values ​​corresponding to different left eye viewpoints decrease as they approach the left eye position.

17. The display method of claim 15, wherein when the high crosstalk area is located outside a pair of eyes and two or more viewpoints are located in the high crosstalk area, a first ratio value corresponding to a different right eye viewpoint decreases as the user approaches the right eye position, and a second ratio value corresponding to a different left eye viewpoint decreases as the user approaches the left eye position.

18. The display method of claim 11 , wherein the plurality of left-eye viewpoints and the plurality of right-eye viewpoints are distributed non-uniformly on a reference line.

19. The display method of claim 11 , wherein the number of the plurality of left eye viewpoints and the plurality of right eye viewpoints between the left eye position and the right eye position is greater than or equal to the number located outside the left eye position and the right eye position.

20. The display method according to claim 11 , wherein the 3D display device is a naked-eye 3D image display device.

Images