Scanning display device

Abstract

A scanning type display device comprises a display panel, a scanning module and an actuator. The display panel comprises a display surface and a plurality of light-emitting parts, the light-emitting parts are arranged on the display surface in a two-dimensional mode, each light-emitting part is provided with a light-emitting surface, and each light-emitting surface is provided with a plurality of light-emitting pixel areas. The scanning module comprises a shading plate, the shading plate covers the display surface and is provided with a plurality of light-transmitting areas arranged in a two-dimensional mode, the shading plate and the display surface are spaced, and the light-transmitting areas are located in the irradiation range of the light-emitting surfaces of the light-emitting parts. The actuator is connected to the scanning module, and the actuator is used for controlling the shading plate to move relative to the display panel, so that the light-transmitting areas move along a scanning path in the irradiation range, and the light-transmitting areas correspond to different light-emitting pixel areas when moving to different positions.

Description

Technical Field

[0001] The present invention relates to a display device, and in particular to a scanning display device. Background Art

[0002] In recent years, display devices that use tiny light-emitting diodes (micro LEDs) as display elements have attracted much attention. The main structure of the display device is to arrange multiple micro LEDs on a panel. Since the size of each micro LED is very small, it can achieve a high-resolution display effect.

[0003] However, for display devices using micro LEDs, if one wishes to further improve the display resolution, the number and arrangement density of micro LEDs must be increased, which results in a significant increase in cost and makes repair or replacement more difficult. Summary of the invention

[0004] In one embodiment, a scanning display device is provided, including a display panel, a scanning module, and an actuator. The display panel includes a display surface and a plurality of light-emitting elements, wherein the plurality of light-emitting elements are arranged two-dimensionally on the display surface, wherein each light-emitting element has a light-emitting surface, and the light-emitting surface has a plurality of light-emitting pixel areas. The scanning module includes a shading plate, which covers the display surface and has a plurality of light-transmitting areas arranged two-dimensionally, and the shading plate is spaced apart from the display surface, and each light-transmitting area is located within the irradiation range of the light-emitting surface of each light-emitting element. The actuator is connected to the scanning module, and the actuator is used to control the movement of the shading plate relative to the display panel, so that each light-transmitting area moves along a scanning path within the irradiation range, and each light-transmitting area corresponds to a different light-emitting pixel area when it moves to a different position.

[0005] In some embodiments, each light-transmitting area of ​​the light-shielding plate is a hole and penetrates two opposite surfaces of the light-shielding plate.

[0006] In some embodiments, the scanning module includes a plurality of light guide members arranged in two dimensions, wherein the plurality of light guide members are located between the display surface of the display panel and the shading plate, and each light guide member is located within the illumination range of the light-emitting surface of each light-emitting member to guide the light emitted by each light-emitting member to the corresponding light-transmitting areas.

[0007] In some embodiments, the actuator is used to control the light shielding plate to move synchronously with the plurality of light guide members.

[0008] In some embodiments, the multiple light guides are disposed on a substrate, the substrate is located between the display panel and the light shielding plate, the substrate maintains a distance from the display panel and the light shielding plate respectively, and the substrate and the light shielding plate are jointly fixed on a carrier, and the actuator is used to control the movement of the carrier relative to the display panel.

[0009] In some embodiments, each light guide element is a microlens, a meta-lens, or a Fresnel lens.

[0010] In some embodiments, each light-guiding member includes a flexible optical fiber having a first end and a second end, wherein the first end is connected to each light-transmitting area of ​​the shading plate, and the second end extends to the light-emitting surface of each light-emitting member to receive light emitted by each light-emitting member.

[0011] In some embodiments, each light guide comprises a light coupling unit, which is located between the second end of the flexible optical fiber and the light emitting surface of each light emitting element, and is used to guide the light emitted by each light emitting element into the second end.

[0012] In some embodiments, the optical coupling unit includes a first curved reflector plate and a second curved reflector plate, the two ends of the first curved reflector plate are respectively connected to the two ends of the second curved reflector plate, and the light emitted by each light-emitting element enters between the first curved reflector plate and the second curved reflector plate and enters the second end after at least one reflection.

[0013] In some embodiments, the size of each light-transmitting area of ​​the light-shielding plate is the same as the size of each light-emitting pixel area of ​​each light-emitting element.

[0014] In summary, according to the scanning display device of the embodiment of the present invention, the actuator is used to control the movement of the shading plate relative to the display panel, so that each light-transmitting area of ​​the shading plate moves along a scanning path within the illumination range of each light-emitting component, and each light-transmitting area corresponds to a different light-emitting pixel area when it moves to a different position. This can achieve the goal of further improving the resolution (or resolution) of the image displayed by the scanning display device without increasing the number of light-emitting components, thereby reducing manufacturing costs and the difficulty of repair or replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional diagram of an embodiment of a scanning display device of the present invention;

[0016] Figure 2 is an exploded perspective view of an embodiment of a scanning display device of the present invention;

[0017] Figure 3 is a cross-sectional view of an embodiment of a scanning display device of the present invention;

[0018] Figure 4 is a scanning schematic diagram of an embodiment of a scanning display device of the present invention;

[0019] Figure 5 It is a continuation Figure 4 Scanning diagram of

[0020] Figure 6 is a cross-sectional view of another embodiment of the scanning display device of the present invention;

[0021] Figure 7 is a partially enlarged cross-sectional view of another embodiment of the scanning display device of the present invention;

[0022] Figure 8 It is a schematic diagram of the scanning display device of the present invention used as a projection device.

[0023]

Explanation of symbols

[0024] 1,2: Scanning display device

[0025] 10: Display Panel

[0026] 11: Display surface

[0027] 15: Luminous parts

[0028] 16: Luminous surface

[0029] 17: Luminous pixel area

[0030] 20: Scanning module

[0031] 21:Visor

[0032] 22: Light-transmitting area

[0033] 24:Substrate

[0034] 25a, 25b: light guide

[0035] 26: Flexible optical fiber

[0036] 261: First End

[0037] 262: Second End

[0038] 27: Optical coupling unit

[0039] 271: first curved reflector

[0040] 272: Second curved reflector

[0041] 30: Actuator

[0042] 40: Vehicles

[0043] 50: Projection lens

[0044] 51: Object

[0045] G: Arrangement spacing

[0046] P: Scan path

[0047] A: Optical axis DETAILED DESCRIPTION

[0048] It should be noted that in the description of each embodiment, the so-called "first" and "second" are used to describe different elements, and these elements are not limited by such predicates. In addition, for the convenience and clarity of the description, the thickness or size of each element in the drawings is expressed in an exaggerated, omitted or schematic manner for the understanding and reading of people familiar with this technology, and the size of each element is not completely its actual size, and is not used to limit the limiting conditions that the present invention can be implemented, so it has no technical substantive significance. Any structural modification, change in proportional relationship or adjustment of size, without affecting the effect and purpose that the present invention can produce, should still fall within the scope of the technical content disclosed by the present invention. The same reference numerals will be used to represent the same or similar elements in all drawings.

[0049] Figure 1 is a three-dimensional diagram of an embodiment of a scanning display device of the present invention, Figure 2 is an exploded perspective view of an embodiment of a scanning display device of the present invention, Figure 3 is a cross-sectional view of an embodiment of a scanning display device of the present invention, Figure 4 FIG. 1 is a scanning schematic diagram of an embodiment of a scanning display device of the present invention. Figures 1 to 3 As shown, the scanning display device 1 according to the embodiment of the present invention comprises a display panel 10 , a scanning module 20 and an actuator 30 , wherein the actuator 30 is used to control the scanning module 20 to move relative to the display panel 10 .

[0050] like Figure 1 and Figure 2 As shown, in this embodiment, the display panel 10 is an actively luminous display, and the display panel 10 includes a display surface 11 and a plurality of light-emitting elements 15. The plurality of light-emitting elements 15 are two-dimensionally arranged on the display surface 11 to form a two-dimensional array, wherein each light-emitting element 15 has a light-emitting surface 16, and each light-emitting element 15 can emit light from the light-emitting surface 16 when powered.

[0051] like Figure 2 and Figure 4 As shown, the light-emitting surface 16 of each light-emitting element 15 has a plurality of light-emitting pixel areas 17. Specifically, each light-emitting pixel area 17 is a local area of ​​the light-emitting surface 16, for example, Figure 4 In the embodiment of the present invention, a plurality of light-emitting pixel regions 17 are arranged in a two-dimensional array. Figure 4 In the figure, a plurality of dotted lines are used to separate the boundaries of each light-emitting pixel region 17. However, the above embodiment is only an example, and the number, shape and arrangement of the plurality of light-emitting pixel regions 17 can be adjusted according to actual product requirements. In addition, in the present embodiment, the plurality of light-emitting elements 15 have an arrangement spacing G, but this is not limited to this, and the plurality of light-emitting elements 15 can also be connected to each other to form an arrangement spacing G of 0.

[0052] In some embodiments, each light-emitting element 15 may be a light-emitting diode (LED). For example, the display panel 10 may be a micro-LED display, and each light-emitting element 15 may be a micro-LED with a size of less than 50 μm.

[0053] like Figures 1 to 3 As shown, the scanning module 20 includes a shading plate 21, wherein the shading plate 21 is a film or plate made of opaque material. In some embodiments, the shading plate 21 can be made of dark plastic (such as black or brown plastic), wherein the dark plastic can be polyester (PET), polyethylene (PE), polypropylene (PP) or acrylic, etc., to provide a complete shading effect. Alternatively, the surface of the shading plate 21 can have a special optical coating to completely block light through the optical coating and reduce reflection and glare.

[0054] like Figure 1 and Figure 2 As shown, the shading plate 21 covers the display surface 11 of the display panel 10 and has a plurality of light-transmitting areas 22, wherein each light-transmitting area 22 is a local area through which light can directly pass without having a light-shielding effect, and the plurality of light-transmitting areas 22 are arranged two-dimensionally to form a two-dimensional array. In addition, the shading plate 21 is spaced apart from the display surface 11 of the display panel 10, the number of light-transmitting areas 22 may correspond to the number of light-emitting elements 15, and each light-transmitting area 22 is located within the illumination range of the light-emitting surface 16 of the corresponding light-emitting element 15. In other words, Figure 2 As shown, the shading plate 21 has a plurality of light-transmitting areas 22 and other opaque areas. Each light-transmitting area 22 is located within the projection range of the light-emitting surface 16 of each light-emitting component 15 in the Z-axis direction. When the light-emitting surface 16 of each light-emitting component 15 emits light, the light will correspondingly illuminate one of the light-transmitting areas 22, so that the light can be concentrated and transmitted through the light-transmitting area 22, and will not be transmitted from the opaque area of ​​the shading plate 21.

[0055] like Figure 1 and Figure 2 As shown, in this embodiment, each light-transmitting area 22 of the light-shielding plate 21 is a hole and penetrates two opposite surfaces of the light-shielding plate 21, wherein the light-transmitting area 22 can be a square (such as Figure 2 However, the above embodiments are only examples. In some embodiments, the light shielding plate 21 may also be partially made of a light-transmitting material to form the above-mentioned plurality of light-transmitting areas 22, and is not limited to the form of holes.

[0056] like Figure 3As shown, the actuator 30 is connected to the scanning module 20, and the actuator 30 is used to control the movement of the shading plate 21 relative to the display panel 10 to perform a scanning operation. In some embodiments, the actuator 30 is a device that can convert an input signal into a mechanical motion or force. For example, the actuator 30 can be an electric actuator, and the electric actuator can be a driving motor such as an electric motor, a linear motor or a stepping motor.

[0057] like Figure 3 As shown, in the present embodiment, the scanning module 20 includes a carrier 40, for example, the carrier 40 may be a frame or a supporting base, the shading plate 21 may be fixed on the carrier 40, and a transmission mechanism may be connected between the actuator 30 and the carrier 40, for example, the transmission mechanism is a gear transmission mechanism, a worm gear mechanism or a cam mechanism and is connected to a driving motor, so as to drive the carrier 40 to operate through the driving motor and the transmission mechanism to drive the shading plate 21 to move relative to the display panel 10.

[0058] It should be noted that Figure 4 and Figure 5 The light shielding plate 21 of the scanning module 20 is presented in a perspective manner to clearly show the relative positional relationship between each light-transmitting area 22 of the light shielding plate 21 and each light-emitting pixel area 17 of the light-emitting element 15. Figure 4 and Figure 5 As shown, in this embodiment, the actuator 30 can drive the shading plate 21 to move along the X-axis and Y-axis directions relative to the display panel 10, so that each light-transmitting area 22 of the shading plate 21 moves along a scanning path P within the illumination range of the light-emitting surface 16 of each corresponding light-emitting element 15, and each light-transmitting area 22 moves to a different position corresponding to a different light-emitting pixel area 17 of the same light-emitting element 15. Figure 4 and Figure 5 From the perspective of the perspective, during the movement of each light-transmitting area 22 along the scanning path P, each light-transmitting area 22 can perform multiple repeated scans from the upper left corner within the illumination range of the light-emitting surface 16 from left to right and from top to bottom, and each light-transmitting area 22 can complete a scanning operation of the illumination range of the light-emitting surface 16 within a scanning cycle (e.g., 0.01 second to 0.1 second). However, the above embodiment is only an example, and in fact, the moving direction of the light-shielding plate 21 and the scanning path P can be adjusted according to actual product requirements.

[0059] Please check again Figure 4 and Figure 5As shown, in the present embodiment, the size of each light-transmitting area 22 of the light-shielding plate 21 is the same as the size of each light-emitting pixel area 17 of each light-emitting element 15. For example, assuming that the size of each light-emitting element 15 is 50μm×50μm, and the size of each light-emitting pixel area 17 is 10μm×10μm, the size of each light-transmitting area 22 of the light-shielding plate 21 can be 10μm×10μm. In addition, during the scanning movement of each light-transmitting area 22 of the light-shielding plate 21, the position of each light-transmitting area 22 will continuously change, so that each light-transmitting area 22 corresponds to a different light-emitting pixel area 17 on the light-emitting surface 16 of each light-emitting element 15 when at a different position. For example, as Figure 4 As shown, the position of each light-transmitting area 22 corresponds to the light-emitting pixel area 17 at the upper left corner of the light-emitting surface 16. Therefore, the light emitted by the light-emitting pixel area 17 at the upper left corner can be transmitted through the light-transmitting area 22. Then, when each light-transmitting area 22 moves along the scanning path P, the position of each light-transmitting area 22 will change and correspond to other light-emitting pixel areas 17, for example Figure 5 As shown, here, the position of each light-transmitting area 22 is moved to correspond to the light-emitting pixel area 17 in the middle of the light-emitting surface 16 , and the light emitted by the light-emitting pixel area 17 in the middle is transmitted from each light-transmitting area 22 instead.

[0060] Thus, the scanning display device 1 of the embodiment of the present invention controls the movement of the shading plate 21 relative to the display panel 10 through the actuator 30, so that each light-transmitting area 22 of the shading plate 21 moves along a scanning path P within the irradiation range of each light-emitting element 15, and each light-transmitting area 22 corresponds to a different light-emitting pixel area 17 when it moves to a different position, so that the resolution (or resolution) of the image displayed by the scanning display device 1 can be further improved without increasing the number of light-emitting elements 15, thereby greatly reducing the manufacturing cost. In addition, since the number and arrangement density of the light-emitting elements 15 do not need to be increased, it is easier to repair or replace each light-emitting element 15 when it fails or is damaged, thereby reducing the difficulty of subsequent maintenance.

[0061] For example Figure 2 and Figure 3 As shown, in the present embodiment, the scanning module 20 further includes a plurality of light guide members 25a arranged in two dimensions, the plurality of light guide members 25a being located between the display surface 11 of the display panel 10 and the shading plate 21, and each light guide member 25a being located within the irradiation range of the light emitting surface 16 of each light emitting member 15, so as to guide the light emitted by each light emitting member 15 to the corresponding light-transmitting areas 22, so as to prevent the light from being diverged to other areas and affecting the image quality.

[0062] In some embodiments, each light guide element 25a may be a micro lens, a meta lens or a Fresnel lens. Figure 2 and Figure 3As shown, in this embodiment, each light guide member 25a has an optical axis A, and the center of each light-transmitting area 22 of the shading plate 21 is located on the optical axis A of the corresponding light guide member 25a, so that each light guide member 25a can converge the light emitted by each light-emitting member 15 to the corresponding light-transmitting area 22.

[0063] In addition, the actuator 30 can control the shading plate 21 to move synchronously with the plurality of light guides 25a, so that when the shading plate 21 moves relative to the display panel 10, the center of each light-transmitting area 22 can be continuously maintained on the optical axis A of each light guide 25a to maintain a good light focusing effect. Figure 2 and Figure 3 As shown, in the present embodiment, a plurality of light guide members 25a are arranged in a two-dimensional manner on a substrate 24, the substrate 24 is located between the display panel 10 and the light shielding plate 21, the substrate 24 maintains a distance from the display panel 10 and the light shielding plate 21 respectively, and the substrate 24 and the light shielding plate 21 are fixed together on a carrier 40, whereby, when the actuator 30 controls the carrier 40 to move relative to the display panel 10, the light shielding plate 21 and the substrate 24 can be driven to move synchronously.

[0064] Figure 6 is a cross-sectional view of another embodiment of the scanning display device of the present invention, Figure 7 FIG. 2 is a partially enlarged cross-sectional view of another embodiment of the scanning display device of the present invention. Figure 6 and Figure 7 As shown, this embodiment is different from the above Figure 3 The difference between the embodiments of the present invention lies at least in the different structures of the light guides. Each light guide 25b of the scanning display device 2 of the present embodiment includes a flexible optical fiber 26, wherein the flexible optical fiber 26 has a first end 261 and a second end 262, wherein the first end 261 is connected to each light-transmitting area 22 of the light-shielding plate 21, and the second end 262 extends to the light-emitting surface 16 of each light-emitting element 15, so that the second end 262 of the flexible optical fiber 26 of each light guide 25b can receive the light emitted by the corresponding light-emitting element 15, and transmit the light to the first end 261 to be transmitted from each light-transmitting area 22, thereby preventing the light from being scattered to other areas and ensuring that the light is transmitted to each light-transmitting area 22, thereby effectively improving the image quality. In addition, based on the flexibility of the flexible optical fiber 26, the actuator 30 can only control the movement of the light-shielding plate 21 relative to the display panel 10, so that the transmission structure between the actuator 30 and the light-shielding plate 21 can be further simplified.

[0065] For example Figure 6 and Figure 7As shown, each light guide 25b further includes an optical coupling unit 27, which is located between the second end 262 of the flexible optical fiber 26 and the light emitting surface 16 of each light emitting element 15, and the optical coupling unit 27 is used to guide the light emitted by each light emitting element 15 into the second end 262 of the flexible optical fiber 26. For example, in this embodiment, each optical coupling unit 27 includes a first arc-shaped reflection plate 271 and a second arc-shaped reflection plate 272, and the two ends of the first arc-shaped reflection plate 271 are respectively connected to the two ends of the second arc-shaped reflection plate 272, so that an internal space is formed between the first arc-shaped reflection plate 271 and the second arc-shaped reflection plate 272, and the light emitted by each light emitting element 15 can enter the internal space between the first arc-shaped reflection plate 271 and the second arc-shaped reflection plate 272 and enter the second end 262 of the flexible optical fiber 26 after at least one reflection. In this way, the light emitted by each light emitting element 15 can be converged to the flexible optical fiber 26 through the optical coupling unit 27, thereby greatly reducing the loss of light energy.

[0066] Figure 8 FIG. 1 is a schematic diagram of a scanning display device of the present invention as a projection device. Figure 8 As shown, the display panel 10 of the scanning display device 1 can be a self-luminous projection panel, that is, the scanning display device 1 can be a small projection display device that projects an image onto a surface of an object 51 (such as a wall, a curtain or a screen) via a projection lens 50. Compared with traditional projection devices, it can simplify the optical path and reduce costs.

[0067] To be specific, a conventional projection device needs to convert a light source into red, green and blue light through a filter, a color wheel or a beam splitter, and then irradiate the light to a developing panel (which can be divided into three types of panels, 3LCD, DLP and LCoS, depending on the technology). The image is transmitted to the lens through light penetration or reflection, and then projected on a screen or a wall. It can be seen that the conventional projection device not only has a complex optical path but also has a high manufacturing cost. The scanning display device 1 of the embodiment of the present invention integrates the light source and the developing panel into one to form a self-luminous projection display panel 10, and uses a plurality of light emitting elements 15 arranged in an array to cooperate with a scanning module 20 for scanning and display, which can greatly simplify the optical path and reduce costs.

[0068] Although the technical contents of the present invention have been disclosed as above in the preferred embodiments, they are not used to limit the present invention. Any slight changes and modifications made by anyone familiar with this technology without departing from the spirit of the present invention should be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be based on the scope defined by the attached claims.

Claims

1. A scanning display device, characterized in that: include: A display panel, comprising a display surface and a plurality of light-emitting elements, wherein the plurality of light-emitting elements are two-dimensionally arranged on the display surface, wherein each of the light-emitting elements has a light-emitting surface, and the light-emitting surface has a plurality of light-emitting pixel areas; a scanning module, comprising a shading plate, the shading plate covers the display surface and has a plurality of light-transmitting areas arranged in two dimensions, the shading plate is spaced apart from the display surface, and each of the light-transmitting areas is located within an irradiation range of the light-emitting surface of each of the light-emitting elements; and An actuator is connected to the scanning module, and the actuator is used to control the movement of the shading plate relative to the display panel, so that each of the light-transmitting areas moves along a scanning path within the irradiation range, and each of the light-transmitting areas corresponds to a different luminous pixel area when it moves to a different position.

2. The scanning display device according to claim 1, wherein: Each of the light-transmitting areas of the light-shielding plate is a hole and penetrates through two opposite surfaces of the light-shielding plate.

3. The scanning display device according to claim 1, wherein: The scanning module includes a plurality of light guides arranged in two dimensions, wherein the plurality of light guides are located between the display surface of the display panel and the shading plate, and each of the light guides is located within the irradiation range of the light emitting surface of each of the light emitting elements so as to guide the light emitted by each of the light emitting elements to the corresponding light-transmitting areas.

4. The scanning display device according to claim 3, wherein: The actuator is used for controlling the shading plate and the plurality of light guide members to move synchronously.

5. The scanning display device according to claim 4, wherein: The multiple light guides are arranged on a substrate, which is located between the display panel and the shading plate. The substrate maintains a distance from the display panel and the shading plate respectively, and the substrate and the shading plate are fixed together on a carrier. The actuator is used to control the movement of the carrier relative to the display panel.

6. The scanning display device according to claim 3, wherein: Each of the light guide elements is a micro lens, a meta lens or a Fresnel lens.

7. The scanning display device according to claim 3, wherein: Each of the light guides includes a flexible optical fiber having a first end and a second end. The first end is connected to each of the light-transmitting areas of the shading plate, and the second end extends to the light-emitting surface of each of the light-emitting components to receive the light emitted by each of the light-emitting components.

8. The scanning display device according to claim 7, wherein: Each of the light guide members includes a light coupling unit, which is located between the second end of the flexible optical fiber and the light emitting surface of each of the light emitting members, and is used for guiding the light emitted by each of the light emitting members to enter the second end.

9. The scanning display device according to claim 8, wherein: The optical coupling unit includes a first arc-shaped reflection plate and a second arc-shaped reflection plate. The two ends of the first arc-shaped reflection plate are respectively connected to the two ends of the second arc-shaped reflection plate. The light emitted by each light-emitting element enters between the first arc-shaped reflection plate and the second arc-shaped reflection plate and enters the second end after at least one reflection.

10. The scanning display device according to claim 1, wherein: The size of each light-transmitting area of ​​the light-shielding plate is the same as the size of each light-emitting pixel area of ​​each light-emitting element.

11. The scanning display device according to claim 1, wherein: The display panel is a self-luminous projection panel.

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