A desktop floating display system and design method

Abstract

The present invention relates to a desktop suspended display system and a design method. The system comprises a display source, a curved reflector, and a spectroscopic plate. The display source and the curved reflector are arranged below the spectroscopic plate and face each other. An angle #imgabs0# is set between the display source and the vertical direction, an angle #imgabs1# is set between the curved reflector and the vertical direction, and an angle #imgabs2# is set between the spectroscopic plate and the horizontal direction. The display source is used to project an image. An angle #imgabs3# is set between a main light projected by the display source and a plane normal of the display source. Light emitted by the display source first reaches the spectroscopic plate, and then the spectroscopic plate reflects part of the light to the curved reflector. The light is reflected at the curved reflector, reaches the spectroscopic plate again, and passes through the spectroscopic plate to generate a suspended image in space. The design method of the desktop suspended display system enables the suspended image to be perpendicular to the horizontal direction to form a standing image.

Description

Technical Field

[0001] The present invention relates to the field of space imaging technology, and in particular to a desktop suspension display system and a design method thereof. Background Art

[0002] Suspended display technology, due to its unique spatial imaging effects, has long held great development potential and broad application prospects in commercial displays, education and training, medical treatment, and entertainment. Existing suspended display systems rely on complex optical path designs. Limited by technical capabilities and system architecture, existing devices that rely on beam splitters and curved reflectors to achieve suspended displays suffer from the following issues:

[0003] 1. Existing optical systems that rely on a beam splitter and curved reflectors to achieve suspended displays require the beam splitter to be tilted 45° from the horizontal to achieve a vertical display image, making desktop-style suspended displays impossible. Furthermore, the hardware device is directly exposed to the user's field of view, weakening the display effect of the suspended image and affecting the user's viewing experience. Examples include the suspended display devices disclosed in patent documents CN118655716, CN219676388U, and CN219676388U.

[0004] 2. If existing optical systems that rely on beam splitters and curved reflectors to achieve suspended displays want to achieve desktop-style suspended displays, they usually rotate the entire system to change the beam splitter's tilt angle from 45° to 0°. The resulting suspended image cannot be perpendicular to the ground and will have a 45° tilt angle with the ground, which cannot meet the display effect expected by users. Summary of the Invention

[0005] In order to solve the problem that the image generated by existing floating display devices cannot be perpendicular to the ground, thus affecting the display effect, the present invention proposes a desktop floating display system and design method to generate a floating image perpendicular to the ground, which is convenient for hiding the device and meets the space constraints and interaction requirements of desktop application scenarios.

[0006] To achieve the above-mentioned purpose, the present invention provides a desktop suspended display system in the first aspect, comprising a display source, a curved reflector and a spectroscopic plate, wherein the display source and the curved reflector are arranged below the spectroscopic plate, and the display source and the curved reflector are arranged opposite to each other, and an angle is set between the display source and the vertical direction. θ1 , there is an angle between the curved reflector and the vertical direction θ2 , an angle is set between the light splitting plate and the horizontal direction θ3 ;

[0007] The display source is used to project an image. An angle is set between the main light projected by the display source and the plane normal of the display source. α, the light emitted by the display source first reaches the beam splitter plate, and then the beam splitter plate reflects part of the light to the curved reflector, and then reflects at the curved reflector, reaches the beam splitter plate again and passes through the beam splitter plate, generating a suspended image in space;

[0008] The incident angle of the principal ray on the curved reflector is β , there is an angle between the suspended image and the main light θ4 ;

[0009] The angle θ3 The range is 0°≤θ3≤30° ;

[0010] when θ4+2*θ2+2*θ3-θ1-α=90° , the suspended image is perpendicular to the horizontal direction to form a standing image.

[0011] The function of the display source is to provide display content; the function of the curved reflector is to modulate the light from the display source to generate a suspended image; the function of the spectroscopic plate is to reflect the light from the display source and transmit the light from the curved reflector.

[0012] Furthermore, it includes a spectroscopic flat panel, multiple display sources and a curved reflector assembly.

[0013] Furthermore, it includes a spectroscopic flat panel, multiple display sources and multiple curved reflector assemblies.

[0014] The floating display system can be a single display source with a single curved reflector, multiple display sources with a single curved reflector, or multiple display sources with multiple curved reflectors. This flexible configuration can meet the needs of different scenarios, enabling multi-screen overlay displays or the construction of complex scenes.

[0015] The second aspect of the present invention provides a design method for a desktop floating display system, which includes: Step 1: obtaining the distance from the center of the display source to the spectroscopic plate; d1 , get the distance from the curved reflector to the beam splitter plate d2 ,according to d1 and d2 and angle α Calculation shows the effective imaging distance from the source to the curved reflector d12 ;

[0016] Step 2: Measure the angle θ1 , angle θ2 , angle θ3 and angle α Calculating the angle of incidence β ;

[0017] Step 3: According to the angle θ1 , angle θ2 , angle θ3 and angle α and effective imaging distance d12 Combined with the focal length of the curved mirror F Calculate the angle θ4 ,satisfy θ4+2*θ2+2*θ3-θ1-α=90° ;

[0018] Step 4: Based on the width of the display source l , effective imaging distance d12 , focal length of the curved reflector F , angle of incidence β and angle α Calculate the proportional coefficient, according to the proportional coefficient or Adjust the width of the standing image H ;

[0019] Step 5: According to the width of the standing image H , display source width l 、 d2 , effective imaging distance d12 , angle θ2 , angle α , angle of incidence β Calculate the height from the center of the standing image to the plane where the center of the spectroscopic plate is located d3 , ensuring the standing image projection effect.

[0020] Furthermore, the imaging distance in step 1 is d12 As shown in formula (1):

[0021] d12= d1 / sin(θ1+α)+ d2 / sin(θ1+α-2*θ3) (1).

[0022] Furthermore, the incident angle in step 2 β As shown in formula (2):

[0023] β=θ2+2*θ3-θ1-α (2).

[0024] Furthermore, the angle in step 3 θ4 As shown in formula (3):

[0025] θ4=arctan[(d12*cosβ-F) / (F*tanα)] (3).

[0026] By solving various parameters through trigonometric functions and optical formulas, the desktop floating display system can generate standing images.

[0027] Furthermore, the proportional coefficient in step 4 or As shown in formula (4):

[0028] η=4F(d12*cosβ-F)cosα / {[(2*d12-l*sinα)cosβ-2 *F] *[(2*d12+l*sinα)cos β-2 *F]sinθ4} (4);

[0029] Width of the standing image H As shown in formula (5):

[0030] H=η*l (5).

[0031] Furthermore, the height from the center of the standing image to the plane where the center of the spectroscopic plate is located in step 5 is d3 As shown in formula (6):

[0032] d3= [d12 * F*cos(π / 2-θ2-β) / (d12 *cosβ-F)]-d2+{ l*F*cosα / [(2 *d12-l * sinα)cosβ-2 *F ]} -（H / 2） (6).

[0033] By using formulas (4) to (6), the length and width of the standing image are adjusted to meet different display needs.

[0034] Through the above technical solution, the beneficial effects of the present invention are:

[0035] 1. The present invention realizes the display of standing images, which are perpendicular to the horizontal direction, thus improving the display effect. The display source and the curved reflector are placed below the spectroscopic plate, and an angle is set between the display source and the vertical direction. θ1 , there is an angle between the curved reflector and the vertical direction θ2 , there is an angle between the beam splitter plate and the horizontal direction θ3 , an angle is set between the main light projected by the display source and the plane normal of the display source α , the incident angle of the principal ray on the curved reflector is β , there is an angle between the suspended image and the main light θ4 ,when θ4+2*θ2+2*θ3-θ1-α=90° The suspended image is perpendicular to the horizontal direction, forming a standing image. Image light originates from the display source, first hitting the bottom surface of the beam splitter plate and being reflected. It then reaches the curved reflector, where it is reflected by the curved reflector before passing through the beam splitter plate. Ultimately, the observer sees a standing, suspended image above the display system, achieving a hidden desktop-style suspended display. The suspended image is perpendicular to the horizontal direction, forming a standing image.

[0036] 2. The present invention realizes the design of a desktop floating display system. The optical parameters ( θ1~θ4、 α 、 β 、 d1 、 d2 、 F 、 d12 ) ensures that the suspended image strictly meets the vertical condition, eliminating the problem of image tilt in traditional systems in principle.

[0037] This system provides a complete set of mathematical calculation models. Designers only need to input the basic system parameters according to the formula to quickly and accurately calculate other key parameters, greatly simplifying the design process. This eliminates the need for complex optical simulation equipment and lengthy testing processes, lowering the skill threshold required of professional optical designers. This reduces the manpower, material, and time costs of the design process, improves design efficiency, and helps promote the widespread application of desktop floating display systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a structural schematic diagram of a desktop floating display system according to the present invention;

[0039] Figure 2 for Figure 1 Schematic diagram of the operation principle;

[0040] Figure 3 This is a second structural diagram of a desktop floating display system according to the present invention;

[0041] Figure 4 for Figure 3 Schematic diagram of the operation principle;

[0042] Figure 5 This is the third structural diagram of a desktop floating display system of the present invention;

[0043] Figure 6 for Figure 5 Schematic diagram of the operation principle;

[0044] Figure 7 This is a fourth structural diagram of a desktop floating display system of the present invention;

[0045] Figure 8 The present invention is a flowchart of the steps of a design method for a desktop floating display system.

[0046] Reference numerals: 1 is the display source, 2 is the curved reflector, 3 is the spectroscopic plate, and 4 is the standing image. DETAILED DESCRIPTION

[0047] Example 1

[0048] like Figure 1~8 As shown, a desktop suspended display system includes a display source 1, a curved reflector 2 and a light splitting plate 3. The display source 1 and the curved reflector 2 are arranged below the light splitting plate 3, and the display source 1 and the curved reflector 2 are arranged opposite to each other. An angle is set between the display source 1 and the vertical direction. θ1 , an angle is set between the curved reflector 2 and the vertical direction θ2 , the angle between the light splitting plate 3 and the horizontal direction is set θ3 ;

[0049] The display source 1 is used to project an image. An angle is set between the main light projected by the display source 1 and the plane normal of the display source 1. α , the light emitted by the display source 1 first reaches the beam splitter plate 3, and then the beam splitter plate 3 reflects part of the light to the curved reflector 2, where it is reflected again and reaches the beam splitter plate 3 and passes through the beam splitter plate 3, generating a suspended image in space;

[0050] The incident angle of the principal ray on the curved reflector 2 is β , there is an angle between the suspended image and the main light θ4 ;

[0051] The angle θ3 The range is 0°≤θ3≤30° ;

[0052] when θ4+2*θ2+2*θ3-θ1-α=90° , the suspended image is perpendicular to the horizontal direction to form a standing image 4.

[0053] A desktop suspended display system comprises a light splitting plate 3, a plurality of display sources 1 and a curved reflector 2 combination.

[0054] A desktop suspended display system comprises a light splitting plate 3, a plurality of display sources 1 and a plurality of curved reflectors 2.

[0055] The surface shape of the curved reflector 2 is not fixed, and can be a spherical surface, an aspherical surface, or a free-form surface, and can have a certain off-axis amount.

[0056] The spectroscopic plate 3 has a certain spectroscopic ratio and can transmit a portion of light and reflect a portion of light. Its function is to reflect the light from the display source 1 and transmit the light from the curved reflector 2 .

[0057] A method for designing a desktop suspended display system, comprising: Step 1: obtaining the distance from the center of the display source 1 to the light splitting plate 3 d1 , get the distance from the curved reflector 2 to the beam splitter plate 3 d2 ,according to d1 and d2 and angle α Calculate and display the effective imaging distance from source 1 to curved reflector 2 d12 ;

[0058] Step 2: Measure the angle θ1 , angle θ2 , angle θ3 and angle α Calculating the angle of incidence β ;

[0059] Step 3: According to the angle θ1 , angle θ2 , angle θ3 and angle α and effective imaging distance d12 Combined with the focal length of the curved mirror F Calculate the angle θ4 ,satisfy θ4+2*θ2+2*θ3-θ1-α=90° ;

[0060] Step 4: Based on the width of display source 1 l , effective imaging distance d12 , focal length of curved mirror 2 F , angle of incidence β and angle α Calculate the proportional coefficient, according to the proportional coefficient or Adjust the width of standing image 4 H ;

[0061] Step 5: According to the width of the standing image 4 H , Display source 1 width l 、 d2 , effective imaging distance d12 , angle θ2 , angle α , angle of incidence β Calculate the height from the center of the standing image 4 to the plane where the center of the spectroscopic plate 3 is located d3 , ensure the standing image 4 projection effect.

[0062] Imaging distance described in step 1 d12 As shown in formula (1):

[0063] d12= d1 / sin(θ1+α)+ d2 / sin(θ1+α-2*θ3) (1).

[0064] The incident angle described in step 2 β As shown in formula (2):

[0065] β=θ2+2*θ3-θ1-α (2).

[0066] Angle described in step 3 θ4 As shown in formula (3):

[0067] θ4=arctan[(d12*cosβ-F) / (F*tanα)] (3).

[0068] The proportional coefficient described in step 4 or As shown in formula (4):

[0069] η=4F(d12*cosβ-F)cosα / {[(2*d12-l*sinα)cosβ-2 *F] *[(2*d12+l*sinα)cos β-2 *F]sinθ4} (4);

[0070] Width of standing image 4 HAs shown in formula (5):

[0071] H=η*l (5).

[0072] The height from the center of the standing image 4 to the plane where the center of the spectroscopic plate 3 is located in step 5 d3 As shown in formula (6):

[0073] d3= [d12 * F*cos(π / 2-θ2-β) / (d12 *cosβ-F)]-d2+{ l*F*cosα / [(2 *d12-l * sinα)cosβ-2 *F ]} -（H / 2） (6).

[0074] Example 2

[0075] In order to reflect the effect of the device of the present invention, the present invention is described in detail:

[0076] Based on the design method of a desktop floating display system in Example 1, a desktop floating display system is designed as shown in Figures 3-4. The floating display system includes three parts: a display source 1, a curved reflector 2, and a spectroscopic plate 3. The display source 1 is located 77 mm below the spectroscopic plate 3, has a length of 48 mm, a width of 32 mm, and is tilted 41° from the vertical direction. The curved reflector 2 is located 47 mm below the spectroscopic plate 3, has a length of 220 mm, a width of 160 mm, and is tilted 19° from the vertical direction. Its surface is a free-form surface with a curvature radius of 224 mm and a conic coefficient of -0.960. The spectroscopic plate 3 has a splitting ratio of 1, a length of 190 mm, a width of 244 mm, and is tilted 15° from the horizontal direction. The display system can ultimately form a standing floating image with a width of 60 mm at 49 mm above the spectroscopic plate.

[0077] like Figure 5-6 As shown, the suspended display system includes three parts: a display source 1, a curved reflector 2, and a spectroscopic plate 3. The display source 1 is located 96 mm below the spectroscopic plate 3, has a length of 50 mm, a width of 52 mm, and is tilted 13° from the vertical. The curved reflector 2 is located 136 mm below the spectroscopic plate 3, and is tilted 31° from the vertical. Its surface is a free-form surface with a curvature radius of 404 mm and a conic coefficient of -0.882. The spectroscopic plate 3 has a splitting ratio of 1, a length of 491 mm, a width of 491 mm, and is tilted 0° from the horizontal. The display system can ultimately form a standing suspended image with a width of 150 mm at 135 mm above the spectroscopic plate.

[0078] like Figure 7As shown, the floating display system comprises five parts: display source 1a, display source 1b, curved reflector 2a, curved reflector 2b, and a spectroscopic plate 3. Display source 1a and display source 1b are located 96 mm below spectroscopic plate 3, are 50 mm long, 52 mm wide, and are tilted 13° from the vertical. Display source 1a is tilted 30° to the left horizontally, while display source 1a is tilted 30° to the right horizontally. Curved reflector 2a and curved reflector 2b are located 136 mm below spectroscopic plate 3, tilted 31° from the vertical. Their surfaces are free-form, with a radius of curvature of 404 mm and a conic coefficient of -0.882. Curved reflector 2a is tilted 30° to the left horizontally, while curved reflector 2b is tilted 30° to the right horizontally. The spectroscopic plate 3 has a splitting ratio of 1, is 1000 mm long, and is 600 mm wide, tilted 0° from the horizontal. The display system can finally form two 150mm wide standing floating images 135mm above the splitter plate ( Figure 7 a and b).

[0079] The embodiments described above are only preferred embodiments of the present invention and do not limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made according to the structure, characteristics and principles described in the patent scope of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. A desktop suspended display system, comprising a display source (1), a curved reflector (2) and a spectroscopic plate (3), characterized in that: The display source (1) and the curved reflector (2) are arranged below the spectroscopic plate (3), and the display source (1) and the curved reflector (2) are arranged opposite to each other, an angle θ1 is set between the display source (1) and the vertical direction, an angle θ2 is set between the curved reflector (2) and the vertical direction, and an angle θ3 is set between the spectroscopic plate (3) and the horizontal direction; The display source (1) is used to project an image. An angle α is set between the main light projected by the display source (1) and the plane normal of the display source (1). The light emitted by the display source (1) first reaches the beam splitter plate (3), and then the beam splitter plate (3) reflects part of the light to the curved reflector (2). After being reflected at the curved reflector (2), the light reaches the beam splitter plate (3) again and passes through the beam splitter plate (3), thereby generating a suspended image in space. The incident angle of the main light on the curved reflector (2) is β, and there is an angle θ4 between the suspended image and the main light; The range of the angle θ3 is 0°≤θ3≤30°; When θ4+2*θ2+2*θ3-θ1-α=90°, the suspended image is perpendicular to the horizontal direction to form a standing image (4).

2. A desktop floating display system according to claim 1, characterized in that: The device comprises a light splitting plate (3), a plurality of display sources (1) and a curved reflector (2).

3. The desktop floating display system according to claim 1, characterized in that: The device comprises a light splitting plate (3), a plurality of display sources (1) and a combination of a plurality of curved reflectors (2).

4. A design method for a desktop floating display system based on the desktop floating display system according to any one of claims 1 to 3, characterized in that: include: Step 1: Obtain the distance d1 from the center of the display source (1) to the beam splitter plate (3), obtain the distance d2 from the curved reflector (2) to the beam splitter plate (3), and calculate the effective imaging distance d12 from the display source (1) to the curved reflector (2) based on d1, d2 and the included angle α; Step 2: Measure the angles θ1, θ2, θ3 and α to calculate the incident angle β; Step 3: Calculate the angle θ4 based on the angle θ1, the angle θ2, the angle θ3, the angle α, the effective imaging distance d12, and the focal length F of the curved reflector, satisfying θ4+2*θ2+2*θ3-θ1-α=90°; Step 4: Calculate the proportionality coefficient according to the width l of the display source (1), the effective imaging distance d12, the focal length F of the curved reflector (2), the incident angle β and the included angle α, and adjust the width H of the standing image (4) according to the proportionality coefficient η; Step 5: Calculate the height d3 from the center of the standing image (4) to the plane where the center of the spectroscopic plate (3) is located based on the width H of the standing image (4), the width l of the display source (1), d2, the effective imaging distance d12, the angle θ2, the angle α, and the incident angle β to ensure the projection effect of the standing image (4).

5. The design method of a desktop floating display system according to claim 4, characterized in that: The imaging distance d12 in step 1 is as shown in formula (1):

6. The design method of a desktop floating display system according to claim 4, characterized in that: The incident angle β in step 2 is shown in formula (2): β=θ2+2*θ3-θ1-α(2).

7. The design method of a desktop floating display system according to claim 4, characterized in that: The angle θ4 in step 3 is as shown in formula (3): θ4=arctan[(d12*cosβ-F) / (F*tanα)](3).

8. The design method of a desktop floating display system according to claim 4, characterized in that: The proportional coefficient η in step 4 is shown in formula (4): η=4F(d12*cosβ-F)cosα / {[(2*d12-1*sinα)cosβ-2*F]*[(2*d12+1*sinα)cosβ-2*F]sinθ4}(4); The width H of the standing image (4) is shown in formula (5): H=η*l(5).

9. The design method of a desktop floating display system according to claim 4, characterized in that: The height d3 from the center of the standing image (4) to the plane where the center of the spectroscopic plate (3) is located is as shown in formula (6): d3=[d12*F*cos(π / 2-θ2-β) / (d12*cosβ-F)]-d2+{l*F*cosα / [(2*d12-l*sinα)cosβ-2*F]}-(H / 2)(6).

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