Projection display

Abstract

To provide a projection display.SOLUTION: A projection display includes a receiving unit 10, a processing control unit 11, a display imaging unit 12 for generating a display image, a projection light source 14, and an offset unit 13. In a first mode, the receiving unit 10 receives a first input image signal, the display imaging unit 12 generates a display image and outputs a first projection image via the projection light source 14, and the offset unit 13 enhances the resolution of the first projection image before projecting it onto a projection screen. In a second mode, the receiving unit 10 receives a plurality of second input image signals, the display imaging unit 12 generates a display image and outputs a second projection image via the projection light source 14, and the offset unit 13 enhances the resolution of the second projection image before projecting it onto a projection screen.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a projection display. [Background technology]

[0002] As the display industry advances and develops, application resolutions are gradually increasing, from standard definition (SD, 720x480), full high definition (Full HD, 1920x1080), 4K ultra high definition (Ultra HD, 3840x2160) to 8K ultra high definition (7680x4320). Currently, 4K ultra high definition resolution is already becoming commonplace, and high-end display devices can reach 8K ultra high definition resolution. High resolution means finer pixel information and better image quality.

[0003] Furthermore, a high frame rate (HFR) is required to increase applications such as smooth video playback, fast interactive tracking and mapping, and stereoscopic multi-view. Generally, the screen frame rate needs to be increased to 240Hz or 480Hz.

[0004] However, conventional projection devices include application circuits that can support high resolution and high frame rates, which makes the entire system complex and large, and the device expensive.

[0005] Therefore, a pressing issue that needs to be resolved in the future is how to provide a low-cost projection display that can flexibly accommodate different image signals with high resolutions and high frame rates and has a relatively simple system. Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention provides a projection display that can flexibly meet different image signals with high resolution and high frame rate, has a relatively simple system, and is low cost.

[0007] The present invention provides a projection display including a receiving unit, a processing control unit electrically connected to the receiving unit, a display imaging unit electrically connected to the processing control unit, a projection light source electrically connected to the processing control unit, and an offset unit electrically connected to the processing control unit, wherein in a first mode, the receiving unit receives a first input image signal and outputs a first output image signal, the processing control unit receives the first output image signal and outputs a first color image signal, a second color image signal, and a third color image signal, the display imaging unit receives the first color image signal, the second color image signal, and the third color image signal to generate the display image, which is converted into a first projection image via the projection light source, and the offset unit projects the first projection image onto a projection screen with an offset according to controlled timing so that the resolution of the first projection image is improved. In a second mode, the receiving unit receives a plurality of second input image signals and outputs a second output image signal, the processing control unit receives the second output image signals and outputs the first color image signal, the second color image signal, and the third color image signal, the display imaging unit receives the first color image signal, the second color image signal, and the third color image signal to generate the display image, which is converted into a second projection image via the projection light source, and the offset unit offsets the second projection image according to the control timing and projects it onto the projection screen so that its resolution is improved.

[0008] In some embodiments, the resolution of the first input image signal is higher than the resolution of each second input image signal.

[0009] In some embodiments, the frame rate of the first input image signal is the same as the frame rate of each second input image signal.

[0010] In some embodiments, the first projected image and the second projected image offset by the offset unit have the same resolution.

[0011] In some embodiments, the receiving unit includes a plurality of image signal input modules that receive the first input image signal in a first mode and a plurality of second input image signals in a second mode; an image signal switching unit that is electrically connected to the plurality of image signal input modules and receives the first input image signal or the plurality of second input image signals; and an image signal processing unit that is electrically connected to the image signal switching unit and receives the first input image signal or the plurality of second input image signals and outputs the first output image signal or the second output image signal.

[0012] In some embodiments, when the image signal processing unit receives the second input image signals, it combines the second input image signals into the second output image signal, and the resolution of the first output image signal is the same as the resolution of the second output image signal.

[0013] In some embodiments, the processing control unit includes an image signal input port that receives the first output image signal in a first mode and the second output image signal in a second mode, a sub-frame processing unit electrically connected to the image signal input port, that receives the first output image signal or the second output image signal, and that outputs a sub-output image signal, and a color management unit electrically connected to the sub-frame processing unit, that receives the sub-output image signal, and that outputs the first color image signal, the second color image signal, and the third color image signal.

[0014] In some embodiments, the resolution of the sub-output image signal is lower than the resolution of the first output image signal or the second output image signal.

[0015] In some embodiments, the processing control unit further includes a system controller electrically connected to the display imaging unit and the offset unit and configured to control the display imaging unit and the offset unit.

[0016] In some embodiments, the system controller receives the first output image signal and outputs a stereoscopic video synchronization signal.

[0017] The present invention provides a projection display including a plurality of receiving units, a plurality of processing control units electrically connected to the receiving units respectively, a display imaging unit electrically connected to the plurality of processing control units, a projection light source electrically connected to the processing control units, and an offset unit electrically connected to the plurality of processing control units, wherein in a first mode, each of the receiving units receives a first input image signal and outputs a first output image signal, each of the processing control units receives the first output image signal and outputs a first color image signal, a second color image signal, and a third color image signal, the display imaging unit receives the first color image signal, the second color image signal, and the third color image signal to generate the display image, which is converted into a first projection image via the projection light source, and the offset unit offsets the first projection image according to controlled timing to improve its resolution and projects it onto a projection screen. In the second mode, each of the receiving units receives a plurality of second input image signals and outputs a second output image signal, the processing control unit receives the second output image signals and outputs the first color image signal, the second color image signal, and the third color image signal, the display imaging unit receives the first color image signal, the second color image signal, and the third color image signal to generate the display image, which is converted into a second projection image via the projection light source, and the offset unit offsets the second projection image according to the control timing and projects it onto the projection screen so that its resolution is improved.

[0018] As described above, the projection display of the present invention can accommodate a variety of commonly used high-resolution (8k / 4k) and high-frame-rate image signal formats, and by modularizing the receiving unit and processing control unit, a more flexible and cost-effective configuration can be provided, making the system relatively simple, low-cost, and adaptable to a variety of high-resolution and high-frame-rate applications. [Brief explanation of the drawings]

[0019] [Figure 1A] 1A and 1B are schematic diagrams corresponding to different image signal formats; [Figure 1B] 1A and 1B are schematic diagrams corresponding to different image signal formats; [Figure 1C] 1A and 1B are schematic diagrams corresponding to different image signal formats; [Figure 1D] 1A and 1B are schematic diagrams corresponding to different image signal formats; [Figure 2] 1 is a schematic diagram of a first embodiment of a projection display according to the present invention. [Figure 3] 1 is a schematic diagram of an embodiment of a receiving unit according to the present invention; [Figure 4] FIG. 2 is a schematic diagram of one embodiment of a processing control unit according to the present invention. [Figure 5] FIG. 10 is a schematic diagram of a modified example of a receiving unit according to the present invention. [Figure 6] FIG. 2 is a schematic diagram of a second embodiment of a projection display according to the present invention. [Figure 7] This is a timing diagram of an 8k resolution / 120Hz stereoscopic image signal. [Figure 8A] This is a timing conversion diagram for a 4k resolution / 120Hz stereoscopic multi-view image signal. [Figure 8B] This is a timing conversion diagram for a 4k resolution / 120Hz stereoscopic multi-view image signal. [Figure 8C]This is a timing conversion diagram for a 4k resolution / 120Hz stereoscopic multi-view image signal. [Figure 8D] This is a timing conversion diagram for a 4k resolution / 120Hz stereoscopic multi-view image signal. DETAILED DESCRIPTION OF THE INVENTION

[0020] As used herein, terms such as "first," "second," "third," "fourth," etc. are used to describe various elements, components, regions, layers, and / or sections, but these elements, components, regions, layers, and / or sections are not intended to be limited by these terms. These terms are used only to distinguish one element, component, region, layer, or section from another. As used herein, terms such as "first," "second," "third," "fourth," and "fifth" do not imply any order or sequence unless clearly indicated by context.

[0021] First, the projection display according to the present invention may be equipped with an image signal source (not shown), such as a PC-based media server. The media server may include a disk or memory for storing and playing 8K / 4K media content, and a codec corresponding to the media content format. The media server may have multiple image signal outputs. For example, the media server may be provided with multiple image signal output ports, all capable of outputting image signals with a resolution of 4K or higher. The image signal output ports may be, but are not limited to, HDMI 2.0 / 2.1, DisplayPort 1.4 / 2.0 / 2.1, or 12G SDI. The above media server is merely an example and is not intended to limit the present invention.

[0022] The projection display according to the present invention can support various commonly used high-resolution (8K / 4K) and high-frame-rate image signals, for example, as shown in the following Table 1. Please note that the following Table 1 is merely an example and is not intended to limit the present invention. [Table 1]

[0023] 1A to 1D are schematic diagrams showing different image signal formats. For example, as shown in FIG. 1A, a single image signal with 8K resolution in format A can be used to output a screen signal 100 with 8K resolution.

[0024] Also, for example, as shown in FIG. 1B, a B-format 8K resolution four-division image signal can correspond to a 4K resolution sub-screen signal 110 in which one 8K resolution is divided into four parts in a cross-shaped manner by simultaneously outputting four image signals.

[0025] 1C, for example, a C-type 8K resolution 2×2 pixel 4-split image signal can be output simultaneously as four image signals, thereby corresponding to 4K resolution screens 151, 152, 153, and 154, in which one 8K resolution is divided into four 2×2 pixel screens. Specifically, the 2×2 pixel 4-split method divides and reconstructs one original 8K resolution image 150 according to the pixel arrangement shown in the figure, and arranges it as four 4K resolution sub-screen signals 151, 152, 153, and 154.

[0026] Also, for example, a D-format 8K resolution / 120 Hz stereoscopic image signal can correspond to a left eye screen and a right eye screen of an 8K resolution stereoscopic image by a two-pass 8K resolution / 60 Hz output image signal. Of course, output can also be performed by corresponding to a 4K resolution screen signal in which the left eye screen of the 8K resolution stereoscopic image is divided into four in a cross-shaped manner, and a 4K resolution screen signal in which the right eye screen of the 8K resolution stereoscopic image is divided into four in a cross-shaped manner, as shown in Figure 1B.

[0027] Also, for example, an E-format 4K resolution / 120Hz stereoscopic multi-view image signal can correspond to left-eye and right-eye screens with viewing angles of four users using eight output image signals. For example, as shown in FIG. 1D , two output image signals can correspond to a 4K resolution / 60Hz left eye screen signal 131 and a 4K resolution / 60Hz right eye screen signal 132 of a first user; simultaneously, two more output image signals can correspond to a 4K resolution / 60Hz left eye screen signal 133 and a 4K resolution / 60Hz right eye screen signal 134 of a second user; simultaneously, two more output image signals can correspond to a 4K resolution / 60Hz left eye screen signal 135 and a 4K resolution / 60Hz right eye screen signal 136 of a third user; simultaneously, two more output image signals can correspond to a 4K resolution / 60Hz left eye screen signal 137 and a 4K resolution / 60Hz right eye screen signal 138 of a fourth user.

[0028] Also, for example, an F-format 4K resolution / 240 Hz image signal can output a 4K resolution / 240 Hz high frame rate screen signal using a single output image signal.

[0029] It should be noted that the above resolutions, frame rates and output formats of the image signals are merely examples and are not used to limit the present invention.

[0030] FIG. 2 is a schematic diagram of a first embodiment of a projection display 1 according to the present invention. The projection display 1 of the first embodiment of the present invention includes a receiving unit 10, a processing control unit 11, a display imaging unit 12, an offset unit 13, a projection light source 14, and a projection lens 16. The processing control unit 11 is electrically connected to the receiving unit 10. The display imaging unit 12 is electrically connected to the processing control unit 11 and generates a display image. The offset unit 13 is electrically connected to the processing control unit 11. The projection light source 14 is electrically connected to the processing control unit 11, and the display image generated by the display imaging unit 12 is converted into a projection image via the projection light source 14. In other words, the light L projected from the projection light source 14 can be converted into a projection image 203, 302 via the display imaging unit 12. The projection images 203, 302 can be projected onto a projection screen via the offset unit 13 and the projection lens 16.

[0031] In some embodiments, the projection display 1 may further include, but is not limited to, a stereoscopic video synchronization signal unit 15. The stereoscopic video synchronization signal unit 15 is electrically connected to the processing control unit 11.

[0032] The receiving unit 10 is connected to, for example, the media server to receive input image signals 200, 300 (for example, the maximum resolution and maximum frame rate can be up to 8K / 60Hz or 4K / 240Hz, or two sets of 4K / 120Hz stereoscopic video image signals) from the media server. In some embodiments, the receiving unit 10 may include a processor such as a video scaler, a graphics processor, or a field programmable gate array (FPGA). In some embodiments, the receiving unit 10 can perform corresponding image signal format processing and adjustment, such as resolution scaling, vertical frame rate conversion, and picture quality adjustment, and output processed output image signals 201, 301 to the processing control unit 11.

[0033] The receiving unit 10 is configured to be switchable between a first mode and a second mode. In the first mode, the receiving unit 10 receives a single first input image signal 200 and outputs a first output image signal 201. That is, in the first mode, the receiving unit 10 can receive, for example, a single maximum resolution or maximum frame rate input image signal 200 (e.g., the above-mentioned 8K / 60 Hz signal in the A format or the 4K / 240 Hz signal in the F format) and output the first output image signal 201. In the second mode, the receiving unit 10 receives a plurality of second input image signals 300 and outputs the second output image signal 301. That is, in the second mode, the receiving unit 10 can receive a plurality of sets of high resolution and high frame rate input image signals 300 (e.g., the above-mentioned 4K / 60 Hz signals in the B to E formats) and output the second output image signal 301. In other words, in some embodiments, the resolution of the first input image signal 200 is greater than or equal to the resolution of each second input image signal 300, and the frame rate of the first input image signal 200 is greater than or equal to the frame rate of each second input image signal 300.

[0034] FIG. 3 is a schematic diagram of an embodiment of a receiving unit 10 according to the present invention. As shown in FIG. 3, in some embodiments, the receiving unit 10 may include, but is not limited to, multiple image signal input modules 101, an image signal switching unit 102, an image signal processing unit 103, a buffer unit 104, and an output port 105. These image signal input modules 101 are used to receive input image signals 200 and 300. These image signal input modules 101 can receive a first input image signal 200 in a first mode and a second input image signal 300 in a second mode. In this embodiment, two image signal input modules 101, each having two input ports (not shown) for receiving two sets of input image signals, are used as an example. That is, the receiving unit 10 can receive four sets of input image signals, but this is not used to limit the present invention. Note that when receiving a single input image signal 200, only one of the two image signal input modules 101 can be used.

[0035] The image signal switching unit 102 is electrically connected to these image signal input modules 101 and receives the input image signals 200 and 300. When receiving a plurality of second input image signals 300, the image signal switching unit 102 can switch between a plurality of sets of second input image signals 300 and transmit the switched second input image signals 300 to the image signal processing unit 103.

[0036] The image signal processing unit 103 is electrically connected to the image signal switching unit 102 and the buffer unit 104 and receives the input image signals 200, 300. The image signal processing unit 103 and the buffer unit 104 can perform signal processing and buffer storage on the input image signals 200, 300. The image signal processing unit 103 then outputs the processed output image signals 201, 301 via the output port 105. In some embodiments, when the image signal processing unit 103 receives a second input image signal 300, it combines the second input image signal 300 into a second output image signal 301. The resolution of the first output image signal 201 is the same as the resolution of the second output image signal 301.

[0037] 2, processing control unit 11 may include a central processor, microprocessor, etc. In a first mode, processing control unit 11 receives first output image signal 201 and outputs first color image signal 201A, second color image signal 201B, and third color image signal 201C. In a second mode, processing control unit 11 receives second output image signal 301 and outputs first color image signal 201A, second color image signal 201B, and third color image signal 201C.

[0038] 4 is a schematic diagram of one embodiment of a processing control unit 11 according to the present invention. As shown in FIG. 4, in some embodiments, processing control unit 11 may include, for example, but is not limited to, an image signal input port 111, a sub-frame processing unit 112, a color management unit 113, a buffer unit 114, and multiple output ports 115. Image signal input port 111 receives a first output image signal 201 in a first mode and a second output image signal 301 in a second mode.

[0039] The sub-frame processing unit 112 is electrically connected to the image signal input port 111 and the buffer unit 114, receives the first output image signal 201 or the second output image signal 301, and outputs the sub-output image signal 202. The sub-frame processing unit 112 and the buffer unit 114 can perform signal processing and buffer storage, and can perform processing such as that shown in FIG. 1C , for example, dividing an 8K resolution image signal into four 4K resolution sub-output image signals in a 2×2 pixel quad division format. In some embodiments, the resolution of the sub-output image signal 202 is lower than the resolution of the first output image signal 201 or the second output image signal 301.

[0040] The color management unit 113 is electrically connected to the subframe processing unit 112, receives the sub-output image signal 202, and outputs a first color image signal 201A, a second color image signal 201B, and a third color image signal 201C. That is, the color management unit 113 performs color processing for the projection display 1, separates the signal into three primary color image signals of a first color, a second color, and a third color (e.g., red, green, and blue), and outputs the signals to a downstream display imaging unit via an output port 115.

[0041] In some embodiments, the processing control unit 11 may further include a system control unit 116. The system control unit 116 is electrically connected to the projection light source 14, the display imaging unit 12, and the offset unit 13 and controls the display imaging unit 12 and the offset unit 13. The system control unit 116 may control the operation of the projection light source 14, the display imaging unit 12, and the offset unit 13, for example, to generate a high-resolution projection display on a projection screen. The system control unit 116 is electrically connected to the stereoscopic video synchronization signal unit 15 and may thereby control the stereoscopic video synchronization signal unit 15 to output a stereoscopic video synchronization signal to a transmission processor (not shown) of external stereoscopic glasses when outputting a stereoscopic projection image. The transmission processor of the stereoscopic glasses may transmit the stereoscopic video synchronization signal to the stereoscopic glasses (not shown), for example, by wireless signal (which may be a radio frequency (RF) signal or an infrared (IR) signal).

[0042] 2, the display imaging unit 12 receives the first color image signal 201A, the second color image signal 201B, and the third color image signal 201C to generate a display image, which is converted into a first projection image 203 (corresponding to the first mode) or a second projection image 302 (corresponding to the second mode) via the projection light source. That is, the light L projected from the projection light source 14 can be used to convert the display image into the first projection image 203 or the second projection image 302 via the display imaging unit 12.

[0043] In some embodiments, display imaging unit 12 includes, for example, first color controller 121, first color microlens display 122, second color controller 123, second color microlens display 124, third color controller 125, and third color microlens display 126. First color controller 121 and first color microlens display 122 correspond to first color image signal 201A, second color controller 123 and second color microlens display 124 correspond to second color image signal 201B, and third color controller 125 and third color microlens display 126 correspond to third color image signal 201C.

[0044] In other words, each of color controllers 121, 123, and 125 is responsible for display processing of a single primary color and is capable of receiving, for example, a 4K resolution / 240 Hz image signal. After processing the image signal, color controllers 121, 123, and 125 output the processed image signal to color microlens displays 122, 124, and 126 to drive color microlens displays 122, 124, and 126.

[0045] These color microlens displays 122, 124, 126 may utilize, for example, a 4K resolution digital micromirror device (DMD). These color microlens displays 122, 124, 126 include, for example, a mirror matrix composed of multiple mirrors that can be deflected at very high speeds. Each mirror has two states, each representing the instantaneous brightness or darkness of each pixel on the screen, and the brightness of each pixel on the screen is determined by the time ratio of its brightness and darkness. These color microlens displays 122, 124, 126 project display images onto a projection optical path using light from projection light source 14 and other optical components (not shown). Projected images 203, 302 of these color microlens displays 122, 124, 126 are projected onto a projection screen via offset unit 13 and projection lens 16.

[0046] The offset unit 13 cooperates with the display imaging unit 12 to enhance the resolution (e.g., from 4K to 8K) of the projection images 203, 302 output from the display imaging unit 12 and project the projection images 203, 302 on the color microlens displays 122, 124, 126 onto a projection screen via the projection lens 16. This allows a projection display 1 with a low native resolution to display a high-resolution projection image. In some embodiments, the resolution of the first projection image 203 is the same as the resolution of the second projection image 302. In other words, even if the resolution of the input image signal is low, the projection image has a high resolution. Specifically, the offset unit 13 can be coupled to, for example, the color microlens displays 122, 124, 126. For example, the offset unit 13 can include two pairs of voice coil motor lenses. One set of voice coil motors is used to deflect and move the projected images of these color microlens displays 122, 124, 126 by half a pixel distance along a first axis, such as moving them up and down along a vertical axis, and another set of voice coil motors is used to deflect and move the projected images of these color microlens displays 122, 124, 126 by half a pixel distance along a second axis, such as moving them left and right along a horizontal axis.

[0047] Next, the control of the projection display for image signals of different formats will be explained as follows.

[0048] 1A and 2, in the case of an 8K resolution single image signal (A format), the receiving unit 10 receives an 8K resolution one-pass input image signal 200 (maximum vertical frame rate, for example, up to 60 Hz), performs corresponding image format processing and adjustment (for example, resolution scaling, vertical frame rate conversion, image quality adjustment, etc.), and outputs the processed output image signal 201 to the processing control unit 11. The sub-frame processing unit 112 (see FIG. 4) of the processing control unit 11 can perform, for example, signal processing and buffer storage, and can execute the process shown in FIG. 1C in which the 8K resolution image signal is divided into four 4K resolution sub-image signals in a 2×2 pixel quad division manner. The color management section 113 (see FIG. 4) of the processing control unit 11 performs color processing for the projection display 1, separating it into three primary color image signals (e.g., 4K resolution / 240 Hz frame rate) of a first color, a second color, and a third color (e.g., red, green, and blue), and outputs them to the downstream display imaging unit 12. Note that the system control section 116 (see FIG. 4) of the processing control unit 11 can control the operations of the projection light source 14, the display imaging unit 12, and the offset unit 13, for example, to generate a high-resolution (e.g., 8K resolution) projection display on a projection screen.

[0049] 1B and 2, in the case of an 8K resolution, four-division image signal (B format), the receiving unit 10 receives four-path, four-division input image signals 300 via a plurality of image signal input modules 101 (see FIG. 3), and combines the received four-path, four-division input image signals 300 into a single 8K resolution image signal via the image signal processing unit 103 and the buffer unit 104 (see FIG. 3). The subframe processing unit 112 (see FIG. 4) of the processing control unit 11 can perform, for example, signal processing and buffer storage, and can execute the process shown in FIG. 1C, in which the 8K resolution image signal is divided into four 4K resolution sub-image signals in a 2×2 pixel, four-division manner. The color management section 113 (see FIG. 4) of the processing control unit 11 performs color processing for the projection display 1, separating it into three primary color image signals (e.g., 4K resolution / 240 Hz frame rate) of a first color, a second color, and a third color (e.g., red, green, and blue), and outputs them to the downstream display imaging unit 12. Note that the system control section 116 (see FIG. 4) of the processing control unit 11 can control the operations of the projection light source 14, the display imaging unit 12, and the offset unit 13, for example, to generate a high-resolution (e.g., 8K resolution) projection display on a projection screen.

[0050] 1C and 2, in the case of an 8K resolution 2×2 pixel 4-split image signal (C format), the receiving unit 10 receives a 4-path 2×2 pixel 4-split image signal 300 via a plurality of image signal input modules 101 (see FIG. 3), and outputs the received 4-split 4K resolution image signal 300 to the processing control unit 11 without performing any screen processing. Note that the function of the subframe processing unit 112 (see FIG. 4) of the processing control unit 11 may be turned off. Next, the color management unit 113 (see FIG. 4) of the processing control unit 11 performs color processing for the projection display 1, separating the signal into three primary color image signals (e.g., 4K resolution / 240 Hz frame rate) of a first color, a second color, and a third color (e.g., red, green, and blue), and outputs the separated signals to the downstream display imaging unit 12. In addition, the system control unit 116 (see FIG. 4) of the processing control unit 11 can control the operation of the projection light source 14, the display imaging unit 12, and the offset unit 13, for example, to generate a high-resolution (e.g., 8K resolution) projection display on a projection screen.

[0051] 5 is a schematic diagram of a modified example of a receiving unit 10A according to the present invention. In the case of an 8K resolution 2×2 pixel 4-split image signal, the receiving unit 10A may include only a buffer and replayer 106 for receiving a 4-path 2×2 pixel 4-split image signal 300 and then outputting the received 4-split 4K resolution image signal 300 to the processing control unit 11. Similarly, the function of the subframe processing unit 112 (see FIG. 4) of the processing control unit 11 may also be turned off.

[0052] 2, in the case of a 4K resolution / 240 Hz image signal (F format), the receiving unit 10 receives a one-pass 4K resolution / 240 Hz frame rate input image signal 200, performs corresponding image format processing and adjustment (e.g., resolution scaling, vertical frame rate conversion, image quality adjustment, etc.), and outputs the processed output image signal 201 to the processing control unit 11. The function of the subframe processing unit 112 (see FIG. 4) of the processing control unit 11 may be turned off, and the 2×2 pixel four-division processing is not performed, and only color processing for the projection display 1 is performed by the color management unit 113 (see FIG. 4) of the processing control unit 11, and the signal is separated into three primary color image signals (e.g., 4K resolution / 240 Hz frame rate) of a first color, a second color, and a third color (e.g., red, green, and blue), which are output to the downstream display imaging unit 12. In addition, the system control unit 116 of the processing control unit 11 (see Figure 4) can control the operation of the projection light source 14 and the display imaging unit 12 while the offset unit 13 is not operating, for example, to generate a projection display with 4K resolution / 240Hz high frame rate on a projection screen.

[0053] FIG. 6 is a schematic diagram of a second embodiment of a projection display 2 according to the present invention. This projection display 2 differs from the projection display 1 of the first embodiment in that it includes multiple receiving units 20A, 20B and multiple processing control units 21A, 21B. The structures and operations of the receiving units 20A, 20B, the processing control units 21A, 21B, the display imaging unit 22, and the offset unit 23 are similar to those of the receiving unit 10, the processing control unit 11, the display imaging unit 12, and the offset unit 13 of the first embodiment, and therefore will not be described again here. Specifically, the receiving units 20A, 20B and the processing control units 21A, 21B of this embodiment may be configured as modular plug-in boards, and one, two, or more sets may be selected and applied depending on the actual usage situation. In this embodiment, two receiving units 20A, 20B and two processing control units 21A, 21B are described as an example, but the present invention is not limited thereto.

[0054] For example, in the case of an 8K resolution / 120 Hz stereoscopic image signal (D format), the two receiving units 20A and 20B each receive a two-path left eye image signal 200L and a right eye image signal 200R corresponding to 8K resolution stereoscopic vision. The two receiving units 20A and 20B each perform processing according to the 8K resolution one-path video, and then output 8K resolution / 60 Hz frame rate output image signals 201L and 201R to the two processing control units 21A and 21B, respectively.

[0055] Alternatively, one receiving unit 20A may receive a four-path cross-sectionally divided left-eye image signal 300L corresponding to 8K resolution stereoscopic vision, and another receiving unit 20B may receive a four-path cross-sectionally divided right-eye image signal 300R corresponding to 8K resolution stereoscopic vision. The two receiving units 20A and 20B combine the received cross-sectionally divided four-path left-eye and right-eye image signals 300L and 300R as 8K resolution left-eye and right-eye image signals, and then output the combined signals to the downstream processing control units 21A and 21B.

[0056] The subframe processing unit 112 (see FIG. 4) of each processing control unit 21A, 21B can perform, for example, signal processing and buffer storage. For example, it can execute the process shown in FIG. 1C, in which an 8K resolution image signal is divided into four 4K resolution subimage signals using a 2×2 pixel quadrant. In other words, the 8K resolution / 60 Hz left-eye and right-eye image signals are converted into four 4K resolution / 240 Hz subimage signals (i.e., four left-eye subimage signals and four right-eye subimage signals). Similarly, the color management unit 113 (see FIG. 4) of each processing control unit 21A, 21B performs color processing for the projection display 2, separating the signals into three-primary color image signals (e.g., 4K resolution / 240 Hz frame rate) of a first color, a second color, and a third color (e.g., red, green, and blue) and outputting them to the downstream display imaging unit 22. Next, one set of image signal receiving interfaces of the three color controllers 221, 223, 225 receives a 4K resolution / 240Hz image signal (defined as an image signal for the left eye of stereoscopic vision) separated into three primary colors by each processing control unit 21A, 21B, and at the same time, another set of image signal receiving interfaces of the three color controllers 221, 223, 225 receives a 4K resolution / 240Hz image signal (defined as an image signal for the right eye of stereoscopic vision) separated into three primary colors by each processing control unit 21A, 21B.

[0057] The three color controllers 221, 223, and 225 synchronously receive stereoscopic left-eye and right-eye image signals, process them, and output 4K resolution / 480 Hz image signals to drive the three color microlens displays 222, 224, and 226 for display. A system control unit 116 (see FIG. 4 ) in one of the two processing control units 21A and 21B can control the operation of the projection light source 24, the display imaging unit 22, and the offset unit 23 to generate, for example, an 8K resolution stereoscopic projection display on a projection screen. The system control unit 116 is also electrically connected to the stereoscopic video synchronization signal unit 15, which can control the stereoscopic video synchronization signal unit 15 to output a stereoscopic video synchronization signal to a transmission processor (not shown) of external stereoscopic glasses when a stereoscopic projection image is to be output. The transmission processor of the stereoscopic glasses can transmit the stereoscopic video synchronization signal to the stereoscopic glasses (not shown), for example, via a wireless signal (which may be an RF signal or an IR signal).

[0058] 7 is a timing diagram of an 8K resolution / 120Hz stereoscopic image signal. As shown in FIG. 7, the stereoscopic video synchronization signal unit 15 (shown in FIG. 2 or FIG. 6) can convert image signals into stereoscopic image signals, such as converting a stereoscopic left-eye image signal corresponding to 8K resolution into timing 432 and a stereoscopic right-eye image signal corresponding to 8K resolution into timing 434. The color controllers 221, 223, and 225 further convert the 8K resolution stereoscopic left-eye and right-eye image signals into timing 430, and the vertical frame rate is doubled to 480Hz. Next, the system control unit 116 (see FIG. 4) of one of the two processing control units 21A, 21B generates two synchronization signals 442, 444 (corresponding to the vertical and horizontal directions, respectively) for controlling the four-phase offset unit 23 so that the four-phase offset unit 23 performs four-phase displacement of the projection screen by only half the pixels, projects the left-eye image signals Lsf1, Lsf2, Lsf3, and Lsf4, and combines them into a single 8K resolution left-eye image, and similarly projects the right-eye image signals Rsf1, Rsf2, Rsf3, and Rsf4, and combines them into a single 8K resolution right-eye image. The projection display 2 controls the stereoscopic video synchronization signal unit 15 via the system control unit 116 so that the stereoscopic video synchronization signal unit 15 outputs the stereoscopic video synchronization signal of timing 440 to a transmission processor (not shown) of external stereoscopic glasses. The transmission processor of the stereo glasses can transmit the stereo video synchronization signal to the stereo glasses (not shown), for example, by wireless signal (which may be radio frequency (RF) signal or infrared (IR) signal). A user can enjoy 8K / 120Hz stereoscopic images by simply wearing the stereo glasses.

[0059] 6, in the case of a 4K resolution / 120 Hz stereoscopic multi-view image signal (E format), for example, eight input image signals are described as corresponding to stereoscopic left and right eye images of four users' viewing angles, but the present invention is not limited thereto. Specifically, eight input image signals 300L, 300R are input as pairs of input image signals 300L, 300R to two receiving units 20A, 20B of the projection display 2. The eight input image signals 300L, 300R are synchronously output at a 4K resolution / 60 Hz frame rate as left eye images and right eye images corresponding to four pairs of users. Here, the input image signals 300L, 300R correspond to the left eye images and right eye images of each user, respectively.

[0060] 8A to 8D are timing conversion diagrams for a 4K resolution / 120 Hz stereoscopic multi-view image signal. First, as shown in FIGS. 6 and 8A, the receiving unit 20A receives 4K resolution / 60 Hz four-path input image signals 300L and 300R with timings U1L, U1R, U2L, and U2R. The stereoscopic video synchronization signal unit 15 performs timing processing as shown in FIG. 8A and outputs a 4K resolution / 240 Hz output image signal 301 to the processing control unit 21A. That is, the output image signal 301 processed by the receiving unit 20A has output timing U1L-U2L-U1R-U2R, and its vertical frame rate is increased to 240 Hz. Note that timing U1L indicates the left eye of the first user, timing U2L indicates the left eye of the second user, timing U1R indicates the right eye of the first user, and timing U2R indicates the right eye of the second user.

[0061] After receiving the output image signal 301 with timing U1L-U2L-U1R-U2R, the processing control unit 21A separates it into three primary color image signals of a first color, a second color, and a third color (e.g., red, green, and blue), and outputs them to the downstream display imaging unit 22.

[0062] As shown in Figures 6 and 8B, the receiving unit 20B simultaneously receives 4K resolution / 60 Hz four-path input image signals 300L and 300R with timings U3L, U3R, U4L, and U4R. The stereoscopic video synchronization signal unit 15 performs timing processing as shown in Figure 8B and outputs a 4K resolution / 240 Hz output image signal 301 to the processing control unit 21B. That is, the output image signal 301 processed by the receiving unit 20B has output timings U3L-U4L-U3R-U4R, and its vertical frame rate is increased to 240 Hz. Note that timing U3L indicates the left eye of the third user, timing U4L indicates the left eye of the fourth user, timing U3R indicates the right eye of the third user, and timing U4R indicates the right eye of the fourth user.

[0063] After receiving the output image signal 301 with timing U3L-U4L-U3R-U4R, the processing control unit 21B separates it into three primary color image signals of a first color, a second color, and a third color (e.g., red, green, and blue), and outputs them to the downstream display imaging unit 22.

[0064] Next, as shown in Figures 6 and 8C, each monochrome color controller 221, 223, and 225 receives two 4K resolution / 240 Hz image signals, simultaneously receiving monochrome image signals with timings U1L-U2L-U1R-U2R and U3L-U4L-U3R-U4R and performing timing conversion. That is, the two 4K resolution / 240 Hz image signals input in parallel are converted into a 4K resolution / 480 Hz image signal with timings U1U2U3U4-LR. The converted image signal is approximately 1 / 480 seconds behind the input image signal, because timing U2L cannot be earlier than the input timing.

[0065] As shown in Figures 6 and 8D, the timing 350 of the stereoscopic glasses' stereoscopic video synchronization signal must be synchronized with the 4K resolution / 480 Hz image signal with timing U1U2U3U4-LR, and both signals are controlled and output by the system control unit 116 of the processing control unit 21A (see Figure 4). Therefore, after internal processing in the projection display 2, the signals are projected and displayed according to the timing U1U2U3U4-LR (i.e., 480 Hz, first user left eye - second user left eye - third user left eye - fourth user left eye - first user right eye - second user right eye - third user right eye - fourth user right eye) to correspond to the stereoscopic left and right eye screens of the four users with different viewing angles. The projection display 2 simultaneously outputs the stereoscopic video synchronization signal with timing 350 to the transmission processor of the stereoscopic glasses, and transmits the stereoscopic video synchronization signal via wireless signal to the stereoscopic glasses of the four users with different viewing angles. A user wearing four different stereoscopic glasses can view the stereoscopic image from four different viewing angles at timings 352, 354, 356, and 358, respectively.

[0066] In addition, if there are only two users of the projection display 2, only one set of receiving unit and processing control unit can be used, whereas if there are four or more users, three or more sets of receiving unit and processing control unit can be used.

[0067] As described above, the projection display according to the present invention can accommodate a variety of commonly used high-resolution (8K / 4K) and high-frame-rate image signal formats, and by modularizing the receiving unit and processing control unit, a more flexible and cost-effective configuration can be provided, making the system relatively simple and low-cost, and enabling it to accommodate a variety of high-resolution and high-frame-rate uses. The receiving unit and processing control unit of the projection display according to the present invention may be configured as modular plug-in boards, and one, two, or more sets can be selected and applied depending on the actual usage situation.

[0068] The components of some embodiments of the present invention have been outlined above to allow those skilled in the art to better understand the concepts of the embodiments of the present invention. It should be understood by those skilled in the art that other processes and structures can be designed or modified based on the embodiments of the present invention to achieve the same purpose and / or achieve the same advantages as the embodiments disclosed herein. Those skilled in the art should understand that these equivalent structures do not depart from the spirit and scope of the present invention, and that various changes, substitutions, and other alterations can be made in the present specification without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the attached patent application. [Explanation of symbols]

[0069] 1, 2: Projection display 10, 10A, 20A, 20B: Receiving unit 11, 21A, 21B: Processing control unit 12, 22: Display imaging unit 13, 23: Offset unit 14: Projection light source 15: 3D video synchronization signal unit 16: Projection lens 100, 110, 131-138, 151-154: Screen signal 101: Image signal input module 102: Image signal switching section 103: Image signal processing section 104: Buffer section 105: Output port 106: Buffers and Replayers 111: Image signal input port 112: Subframe processing unit 113: Color Management 114: Buffer section 115: Output port 116: System control unit 121, 123, 125: Color controller 122, 124, 126: Color microlens display 150: Original image 200, 300, 200L, 200R, 300L, 300R: Input image signal 201, 301, 201L, 201R: Output image signal 202: Sub output image signal 203, 302: Projected image 201A, 201B, 201C: Color image signal 430, 432, 434, 350, 352, 354, 356, 358: Timing U1L, U2L, U3L, U4L, U1LR, U2LR, U3LR, U4LR: Timing U1L-U2L-U1R-U2R, U3L-U4L-U3R-U4R, U1U2U3U4-LR: Timing 442, 444: Synchronization signal Lsf1, Lsf2, Lsf3, Lsf4: Left eye image signals Rsf1, Rsf2, Rsf3, Rsf4: Right eye image signal

Claims

1. A receiving unit; a processing control unit electrically connected to the receiving unit; a display imaging unit electrically connected to the processing control unit for generating a display image; a projection light source electrically connected to the processing control unit; an offset unit electrically connected to the processing control unit; Including, In a first mode, the receiving unit receives a first input image signal and outputs a first output image signal; the processing control unit receives the first output image signal and outputs a first color image signal, a second color image signal, and a third color image signal; the display imaging unit receives the first color image signal, the second color image signal, and the third color image signal to generate the display image; the display image is converted into a first projection image via the projection light source; and the offset unit offsets the first projection image according to controlled timing and projects it onto a projection screen so that its resolution is improved; In a second mode, the receiving unit receives a plurality of second input image signals and outputs a second output image signal, the processing control unit receives the second output image signals and outputs the first color image signal, the second color image signal, and the third color image signal, the display imaging unit receives the first color image signal, the second color image signal, and the third color image signal to generate the display image, the display image is converted into a second projection image via the projection light source, and the offset unit offsets the second projection image according to the control timing and projects it onto the projection screen so that its resolution is improved.

2. The receiving unit a plurality of image signal input modules for receiving the first input image signal in a first mode and for receiving a plurality of the second input image signals in a second mode; an image signal switching unit electrically connected to the plurality of image signal input modules and receiving the first input image signal or the plurality of second input image signals; an image signal processing unit electrically connected to the image signal switching unit, receiving the first input image signal or the plurality of second input image signals, and outputting the first output image signal or the second output image signal; 10. The projection display of claim 1, comprising:

3. The processing control unit an image signal input port for receiving the first output image signal in a first mode and for receiving the second output image signal in a second mode; a sub-frame processing unit electrically connected to the image signal input port, receiving the first output image signal or the second output image signal, and outputting a sub-output image signal; a color management unit electrically connected to the subframe processing unit, receiving the sub-output image signal, and outputting the first color image signal, the second color image signal, and the third color image signal; 10. The projection display of claim 1, comprising:

4. The processing control unit The projection display of claim 1 , further comprising a system controller electrically connected to the display imaging unit and the offset unit, for controlling the display imaging unit and the offset unit.

5. The projection display of claim 4 , wherein the system controller receives the first output image signal and outputs a stereoscopic video synchronization signal.

6. a plurality of receiving units; a plurality of processing control units each electrically connected to a respective one of said receiving units; a display imaging unit electrically connected to the plurality of processing control units and generating a display image; a projection light source electrically connected to the processing control unit; an offset unit electrically connected to a plurality of said processing control units; Including, In a first mode, each of the receiving units receives a first input image signal and outputs a first output image signal; each of the processing control units receives the first output image signal and outputs a first color image signal, a second color image signal, and a third color image signal; the display imaging unit receives the first color image signal, the second color image signal, and the third color image signal to generate the display image; the display image is converted into a first projection image via the projection light source; and the offset unit offsets the first projection image according to controlled timing and projects it onto a projection screen so that its resolution is improved; In a second mode, each of the receiving units receives a plurality of second input image signals and outputs a second output image signal, the processing control unit receives the second output image signals and outputs the first color image signal, the second color image signal, and the third color image signal, the display imaging unit receives the first color image signal, the second color image signal, and the third color image signal to generate the display image, the display image is converted into a second projection image via the projection light source, and the offset unit offsets the second projection image according to the control timing and projects it onto the projection screen so that its resolution is improved.

7. 10. A projection display according to claim 1 or 6, wherein the resolution of the first input image signal is higher than the resolution of each second input image signal.

8. 10. The projection display of claim 1, wherein the frame rate of the first input image signal is the same as the frame rate of each second input image signal.

9. 10. The projection display of claim 1, wherein the first projected image and the second projected image offset by the offset unit have the same resolution.

10. Each receiving unit is a plurality of image signal input modules for receiving the first input image signal in a first mode and for receiving the second input image signal in a plurality of second modes; an image signal switching unit electrically connected to the plurality of image signal input modules and receiving the first input image signal or the plurality of second input image signals; an image signal processing unit electrically connected to the image signal switching unit, receiving the first input image signal or the plurality of second input image signals, and outputting the first output image signal or the second output image signal; 7. The projection display of claim 6, comprising:

11. 11. The projection display of claim 2 or 10, wherein the image signal processing unit receives a plurality of the second input image signals, combines the plurality of second input image signals to form the second output image signal, and the resolution of the first output image signal is the same as the resolution of the second output image signal.

12. Each processing control unit: an image signal input port for receiving the first output image signal in a first mode and for receiving the second output image signal in a second mode; a sub-frame processing unit electrically connected to the image signal input port, receiving the first output image signal or the second output image signal, and outputting a sub-output image signal; a color management unit electrically connected to the subframe processing unit, receiving the sub-output image signal, and outputting the first color image signal, the second color image signal, and the third color image signal; 7. The projection display of claim 6, comprising:

13. 13. The projection display according to claim 3, wherein the resolution of the sub-output image signal is lower than the resolution of the first output image signal or the second output image signal.

14. Each processing control unit: The projection display of claim 6 , further comprising a system controller electrically connected to the display imaging unit and the offset unit, for controlling the display imaging unit and the offset unit.

15. The projection display of claim 14 , wherein the system controller receives the first output image signal or the second output image signal and outputs a stereoscopic video synchronization signal.

Images