A high-transparency display system based on photoluminescence

Abstract

This invention discloses a high-transparency display system based on photoluminescence, comprising: a light source system; an imaging system for generating an image; and a projection system for projecting the image onto a display panel. The display panel has a light-incident surface and a display surface. A second ray is positioned between the imaging system and the projection system, and a third ray is positioned between the projection system and the display panel. The angle between the second ray and the third ray is greater than 0° and less than 180°. The third ray is projected from the light-incident surface onto the display surface. The high-transparency display system of this invention has a simple and compact structure and a small size.

Description

Technical Field

[0001] This invention relates to a display device, and more specifically to a high-transparency display system based on photoluminescence. Background Technology

[0002] Transparent display technology has garnered significant attention in recent years due to its high light transmittance, excellent display effects, and flexible application scenarios. In applications such as retail transparent digital signage, display cases, museum exhibition systems, in-vehicle head-up displays (HUDs), and augmented reality (AR) devices, screens are required to maintain high transparency while presenting vibrant and clear images to achieve rich visual interaction.

[0003] Currently, there are three main technological paths for transparent displays: first, transparent LED display systems, which achieve partial display and partial transparency by attaching LED strips locally; second, optical waveguide display systems, which rely on transparent diffraction or reflective gratings to complete image transmission and transparent display; and third, transparent OLED display systems, which utilize transparent cathode and anode materials to achieve screen light transmission and image emission. However, all of the above existing technologies have significant limitations: transparent LEDs cannot achieve true full-screen transparency; optical waveguide systems are limited by the complex grating fabrication process, making it difficult to mass-produce large-size screens, and the uneven propagation efficiency of red, green, and blue light affects the full color gamut display effect; and transparent OLEDs have not yet achieved large-scale commercialization due to the high cost of transparent electrode materials.

[0004] In summary, existing display devices have bottlenecks in balancing light transmittance and display quality, making it difficult to simultaneously meet the requirements of high transparency and high-quality imaging. Furthermore, their structures are relatively complex and their sizes are large. Summary of the Invention

[0005] To address at least one of the aforementioned technical problems, this invention provides a high-transparency display system based on photoluminescence, which has a simple and compact structure and a small size.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A high-transparency display system based on photoluminescence, comprising:

[0008] Light source system;

[0009] An imaging system used to generate images;

[0010] A projection system for projecting an image onto a display panel having an incident light surface and a display surface, a second ray between the imaging system and the projection system, and a third ray between the projection system and the display panel, wherein the angle between the second ray and the third ray is greater than 0 and less than 180°, and the third ray is projected from the incident light surface onto the display surface.

[0011] In a preferred embodiment, the light-incident surface is concave, and the display panel further has a reflective surface opposite to the light-incident surface, with the display surface located between the concave surface and the reflective surface.

[0012] In a preferred embodiment, the reflective surface is an inclined surface, and a reflective layer is coated on the inclined surface.

[0013] In a preferred embodiment, the light-incident surface is a concave surface, which is either a double-concave surface or a single-concave surface.

[0014] In a preferred embodiment, the imaging system includes a DLP or Micro LED solution.

[0015] In a preferred embodiment, the projection system includes a multi-stage lens, which includes a collimating lens and a prism.

[0016] In a preferred embodiment, the display panel is an irregularly shaped cuboid.

[0017] The present invention adopts the above solution, which has the following advantages compared with the prior art:

[0018] The high-transparency display system of the present invention emits light from the light source system and projects it to the imaging system. After being modulated by the imaging system, the light is formed into a second light and enters the projection system. The projection system further processes and modulates the second light to output a third light. The third light enters the display surface from the light-incident surface of the display panel, and finally achieves a clear image display. The shape of the light path is similar to an "L" shape, which greatly shortens the light path length. The structure is relatively simple and compact, effectively reducing the size of the device. Attached Figure Description

[0019] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A three-dimensional view of eyeglasses according to Embodiment 1 of the present invention;

[0021] Figure 2 An exploded view of eyeglasses according to Embodiment 1 of the present invention;

[0022] Figure 3 This is a schematic diagram of a display panel according to Embodiment 1 of the present invention;

[0023] Figure 4 This is a perspective view of a high-transparency display system according to Embodiment 1 of the present invention;

[0024] Figure 5 This is a planar schematic diagram of the high transparency display system according to Embodiment 1 of the present invention on the XY axis;

[0025] Figure 6 This is a planar schematic diagram of the high transparency display system according to Embodiment 1 of the present invention on the YZ axis;

[0026] Figure 7 This is a perspective view of a high-transparency display system according to Embodiment 2 of the present invention;

[0027] Figure 8 This is a planar schematic diagram of the high transparency display system according to Embodiment 2 of the present invention on the XY axis;

[0028] Figure 9 This is a planar schematic diagram of the high transparency display system according to Embodiment 2 of the present invention on the YZ axis.

[0029] in,

[0030] 100. Eyeglasses; 101. Eyeglass frame; 102. Temples;

[0031] 1. Light source system; 11. First light source collimating lens; 12. Second light source collimating lens; 13. Mounting holes; 14. Heat dissipation groove;

[0032] 2. Imaging system; 21. DMD chip; 22. Chip base;

[0033] 3. Projection system; 31. First image collimating lens; 32. Second image collimating lens; 33. Prism; 34. Mounting base;

[0034] 4. Display panel; 41. Light-receiving surface; 42. Display surface; 43. Reflective surface;

[0035] 51. First ray; 52. Second ray; 53. Third ray; 54. Fourth ray; 54'. Fourth ray; 55. Fifth ray; 61. Sixth ray; 62. Seventh ray; 63. Eighth ray; 64. Ninth ray; 64'. Ninth ray; 65. Tenth ray. Detailed Implementation

[0036] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art. It should be noted that the description of these embodiments is for the purpose of aiding understanding the present invention, but does not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0037] Example 1

[0038] Reference Figures 1 to 6 As shown, this embodiment provides a pair of glasses 100, including a frame 101, temples 102, and a high-transparency display system based on photoluminescence.

[0039] Furthermore, the high transparency display system includes a light source system 1, an imaging system 2, a projection system 3, and a display panel 4, wherein the display panel 4 is located inside the frame 101, and the temple 102 is located between the display panel 4 and the projection system 3.

[0040] Furthermore, the light source system 1 emits modulated light and projects it onto the imaging system 2. The imaging system 2 generates an image, which then enters the projection system 3. After being modulated by the lens of the projection system 3, the image enters the display panel 4. The display panel 4 is equivalent to a lens in eyeglasses, specifically a highly transparent screen. The screen is coated with a photoluminescent transparent fluorescent film. The transparent fluorescent film serves as the light-emitting carrier for image display. When excited by light, the screen can achieve a clear imaging effect while maintaining high light transmittance. The transparent fluorescent film can be any film already available in the prior art. Furthermore, by adjusting the phosphor ratio of the transparent fluorescent film or customizing the color pixel structure, high-quality, precise display of monochrome and full-color images can be achieved to meet diverse needs. Simultaneously, using a monochrome light source fundamentally avoids the rainbow effect caused by the difference in the propagation speeds of red, green, and blue light. The transparent fluorescent film also plays a crucial role in brightness gain and regulation, significantly optimizing display effects and enhancing the visual experience under the same optical configuration. For example, when the light source is ultraviolet light, ultraviolet photoluminescent materials are added to the film; when the light source is infrared light, infrared photoluminescent materials are added. Photoluminescence mainly includes fluorescence and phosphorescence; this invention primarily utilizes fluorescence. It should be noted that the phosphor ratio of the transparent fluorescent film is not the focus of this invention; the focus is on the "L"-shaped optical path structure, which is simple and compact, effectively reducing the system size.

[0041] The light emitted by the light source system 1 is invisible light, specifically ultraviolet light with a wavelength of 365nm in this embodiment. The transparent fluorescent film is an ultraviolet-excited transparent fluorescent film (see reference). Figure 6 (as shown by the dashed line surface), refer to Figure 2As shown, the light source system 1 has multiple LED bead mounting holes 13 and heat dissipation slots 14. The imaging system 2 in this embodiment adopts a DLP solution, with its core component being a DLP2010.2 WVGA DMD chip. Combined with a self-developed circuit board and control system, the light from the light source system 1 directly illuminates the surface of the DMD chip. By controlling the switching state of the micromirrors on the chip and combining pulse width modulation technology, the light is reflected to form a digital square pixel projection image, meeting the image generation requirements. The imaging system 2 includes a chip base 22, on which the DMD chip 21 is mounted.

[0042] The projection system 3 includes a multi-stage lens system used to optically modulate the images generated by the light source system 1 and the imaging system 2 to adapt to the incident light requirements of the subsequent display panel 4. (Refer to...) Figure 2 As shown, the multi-stage lens system includes collimating lenses and prisms 33. The collimating lenses include a first light source collimating lens 11, a second light source collimating lens 12, a first image collimating lens 31, and a second image collimating lens 32. The collimating lenses convert diverging light beams into parallel or quasi-parallel light, ensuring the accuracy of the light path. The prism 33 is positioned between the second light source collimating lens 12 and the second image collimating lens 32. Light emitted from the second light source collimating lens 12 enters the prism 33 from one side and exits from the other side into the second image collimating lens 32; that is, the prism 33 changes the direction of light propagation. The projection system 3 also includes multiple mounting bases 34 for mounting the collimating lenses and prisms 33.

[0043] Furthermore, the display panel 4 has a light-incident surface 41 and a display surface 42. A first ray 51 is provided between the light source system 1 and the imaging system 2, a second ray 52 is provided between the imaging system 2 and the projection system 3, and a third ray 53 is provided between the projection system 3 and the display panel 4. The angle between the second ray 52 and the third ray 53 is greater than 0° and less than 180°. The third ray 53 is projected from the light-incident surface 41 onto the display surface 42. The light-incident surface 41 is concave. The display panel 4 also has a reflective surface 43 opposite to the light-incident surface 41. The display surface 42 is located between the concave surface and the reflective surface 43. Specifically, the display panel 4 is an irregularly shaped cuboid piece, 600mm long, 500mm wide, and 5mm thick, with the display surface 42 being the bottom surface of the cuboid; the concave surface is a double-concave curved surface used for light incident and amplification, with a radius of curvature of 103mm, a diameter of 5mm, and a smooth surface; the reflective surface 43 is an inclined surface with a chamfer of 9.3° and a height of 5mm, and a reflective layer is coated on the inclined surface to achieve directional reflection of light.

[0044] Furthermore, the first ray 51 is one of the original rays in the beam emitted by the light source system 1; the second ray 52 is the ray formed by the modulation of the first ray 51 by the imaging system 2; the third ray 53 is the ray that, after the second ray 52 is processed by the projection system 3, is incident from the double concave curved surface on the left side of the display panel 4. This high-transparency display system also includes a fourth ray 54, a fifth ray 55, a sixth ray 61, a seventh ray 62, an eighth ray 63, a ninth ray 64, and a tenth ray 65. The fourth ray 54 is the ray that, after the third ray 53 is magnified by the double concave curved surface, propagates within the display panel 4; the fifth ray 55... The fourth ray 54 is reflected by the right-side reflective surface 43 and then strikes the bottom transparent fluorescent film. The sixth ray 61 is another original path in the beam emitted by the light source system. The seventh ray 62 is another ray formed after the sixth ray 61 is reflected and modulated by the imaging system 2. The eighth ray 63 is the ray that enters from the left double concave curved surface of the display panel 4 after the seventh ray 62 is processed by the projection system. The ninth ray 64 is the ray that propagates in the display panel 4 after the eighth ray 63 is magnified by the double concave curved surface. The tenth ray 65 is the ray that strikes the bottom transparent fluorescent film after the ninth ray 64 is reflected by the right-side reflective surface 43.

[0045] The optical path in this embodiment is as follows: The light source system 1 emits a beam containing a first ray 51 and a sixth ray 61, which is projected onto the imaging system 2. After being reflected and modulated by the imaging system 2, a second ray 52 and a seventh ray 62 are formed and enter the projection system 3. The projection system 3 further processes and modulates the light to output a third ray 53 and an eighth ray 63. These two rays enter the display panel 4 from the light-incident surface 41 on the left side of the irregular cuboid piece. After being magnified by the double concave curved surface, a fourth ray 54 and a ninth ray 64 are output respectively. The fourth ray 54 and the ninth ray 64 propagate to the inclined surface of the right side of the display panel 4 coated with a reflective surface 43. After being reflected by the reflective surface 43, a fifth ray 55 and a tenth ray 65 are output. The fifth ray 55 and the tenth ray 65 are projected onto the bottom surface of the irregular cuboid piece, which excites the transparent fluorescent film 43 on the bottom surface to emit light, ultimately achieving a clear image display.

[0046] The high-transparency display system of this embodiment can maintain the high light transmittance of the screen and achieve stable and clear image display. It also has the advantages of compact size and wide adaptability. The optical path design is more compact and efficient. The light enters from the side to form an "L"-shaped optical path. The amplification structure and the core components of the optical path are integrated into the irregular cuboid sheet, which greatly shortens the optical path length, effectively reduces the system size, improves adaptability and flexibility, and allows for free adjustment of the display screen size, thus expanding the application range of multiple scenarios.

[0047] Example 2

[0048] Reference Figures 7 to 9As shown, the light source system 1 in this embodiment emits blue light with a wavelength of 405nm, and the imaging system 2 adopts a Micro LED solution, specifically a Micro LED optical engine customized for 405nm blue light. More specifically, the Micro LED solution is a self-emissive display technology that uses micron-level LED chips to directly form light-emitting pixels. Millions of micro LEDs are integrated onto a substrate through a mass transfer process, and each pixel can emit light independently to achieve the display function. The display panel 4 is an irregularly shaped cuboid sheet, 600mm long, 500mm wide, and 4mm thick. The light-incident surface 41 is a flat area processed to form a non-full-surface single concave curved surface with an inclination of 30°. Figure 8 The angle between the light-incident surface 41 and the display surface 42 shown is 16 mm in diameter, with a radius of curvature of 103 mm and an aperture of 4 mm. The display surface 42 is coated with a layer of blue light-excited transparent fluorescent film. Figure 9 The dashed surface in the image can absorb blue light energy and be excited by light.

[0049] The fourth ray 54' and the ninth ray 64' in this embodiment differ from those in Embodiment 1. The fourth ray 54' is the third ray 53 magnified by a single concave surface and propagates within the display panel 4, directly striking the transparent fluorescent film on the bottom surface. The ninth ray 64' is the seventh ray 63 magnified by a single concave surface and propagates within the display panel 4, directly striking the transparent fluorescent film on the bottom surface. There are no fifth or tenth rays. The optical path transmission path is as follows: The light source system 1 emits a beam containing the first ray 51 and the fifth ray 61, which is projected to the imaging system 2. After processing by the imaging system 2, the second ray 52 and the sixth ray 62 are formed and enter the projection system 3 to complete optical modulation and magnification. The projection system 3 outputs the third ray 53 and the seventh ray 63, which are incident from the single concave surface of the display panel 4. After magnification by the single concave surface, the fourth ray 54' and the ninth ray 64' are output and directly projected onto the transparent fluorescent film on the display surface 42. The transparent fluorescent film is excited by light, ultimately achieving a clear image display. This embodiment has no reflective surface, and the optical path structure is simpler than that of Embodiment 1.

[0050] The imaging system in the high-transparency display system of this invention offers two optional solutions: DLP and Micro LED. The system can be flexibly selected according to the cost and display accuracy requirements of the application scenario, and can be combined with different types of light sources and fluorescent film formulations to cater to both high-end customization and mass-market applications, further expanding the practical value of the system.

[0051] The x, y, and z axes shown in the above figures are schematic coordinate systems, used only to clearly indicate the relative positions and structural features of the components, and do not represent the actual spatial installation positions in applications. Their purpose is to simplify the illustrations and facilitate understanding of the technical solution, not to limit the scope of protection of this invention. As shown in this specification and claims, the terms "comprising" and "including" only indicate the inclusion of explicitly identified steps and elements, and these steps and elements do not constitute an exclusive list; the method or apparatus may also include other steps or elements. The term "and / or" as used herein includes any combination of one or more of the associated listed items.

[0052] It should be noted that, unless otherwise specified, when a feature is referred to as "fixed" or "connected" to another feature, it can be directly fixed or connected to the other feature, or indirectly fixed or connected to the other feature. Furthermore, the descriptions of "up," "down," "left," and "right" used in this invention are only relative to the relative positional relationships of the various components of the invention in the accompanying drawings.

[0053] The above embodiments are merely illustrative of the technical concept and features of the present invention, and are preferred embodiments. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and they should not be construed as limiting the scope of protection of the present invention. All equivalent transformations or modifications made according to the principles of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A high-transparency display system based on photoluminescence, characterized in that, include: Light source system; An imaging system used to generate images; A projection system for projecting an image onto a display panel having an incident light surface and a display surface, a second ray between the imaging system and the projection system, and a third ray between the projection system and the display panel, wherein the angle between the second ray and the third ray is greater than 0 and less than 180°, and the third ray is projected from the incident light surface onto the display surface.

2. The high transparency display system according to claim 1, characterized in that, The light-incident surface is concave, and the display panel also has a reflective surface opposite to the light-incident surface, with the display surface located between the concave surface and the reflective surface.

3. The display system according to claim 2, characterized in that, The reflective surface is an inclined surface, and a reflective layer is coated on the inclined surface.

4. The high transparency display system according to claim 1, characterized in that, The light-incident surface is concave, and the concave surface is either a double-concave curved surface or a single-concave curved surface.

5. The high transparency display system according to claim 4, characterized in that, The imaging system includes DLP or MicroLED solutions.

6. The high transparency display system according to claim 1, characterized in that, The projection system includes a multi-stage lens, which includes a collimating lens and a prism.

7. The high transparency display system according to claim 1, characterized in that, The display panel is an irregularly shaped cuboid.

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