CN211454122U - Wide-viewing-angle 3D display device based on gradient pitch slit grating - Google Patents
Wide-viewing-angle 3D display device based on gradient pitch slit grating Download PDFInfo
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- CN211454122U CN211454122U CN202020430314.6U CN202020430314U CN211454122U CN 211454122 U CN211454122 U CN 211454122U CN 202020430314 U CN202020430314 U CN 202020430314U CN 211454122 U CN211454122 U CN 211454122U
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- slit grating
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- 238000003384 imaging method Methods 0.000 claims description 6
- 230000000007 visual effect Effects 0.000 abstract description 5
- 239000011295 pitch Substances 0.000 description 52
- 238000010586 diagram Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The utility model discloses a wide visual angle 3D display device based on gradual change pitch slit grating, including backlight, gradual change pitch slit grating and display screen; the display screen is used for displaying the gradual change pitch image element array; the backlight source, the gradual change pitch slit grating and the display screen are arranged in parallel; the gradually-changed pitch slit grating is positioned between the backlight source and the display screen; the backlight source, the gradual change pitch slit grating and the display screen are correspondingly aligned; the horizontal widths of the backlight source, the gradual change pitch slit grating and the display screen are the same, and the vertical widths of the backlight source, the gradual change pitch slit grating and the display screen are the same; the number of slits in the gradient pitch slit grating is even; the pitch of the picture elements in the array of progressively pitched picture elements is the same as the pitch of their corresponding slits.
Description
Technical Field
The utility model relates to a 3D shows, more specifically says, the utility model relates to a wide visual angle 3D display device based on gradual change pitch slit grating.
Background
Compared with other 3D displays, such as glasses type vision-aided 3D display, helmet type vision-aided 3D display, grating 3D display, volume 3D display, holographic 3D display and the like, the integrated imaging 3D display has the advantages of continuous viewpoints, suitability for watching by multiple people, no need of vision-aided equipment and coherent light sources, simple structure, low cost and the like. The one-dimensional integrated imaging 3D display adopts slit grating instead of pinhole array, and can present 3D images with high vertical resolution. However, the viewing angle of a conventional one-dimensional integrated imaging 3D display is inversely proportional to the number of slits. Existing tapered pitch slit grating techniques can increase the viewing angle by changing the pitch of the slits. However, the existing technology of the gradual change pitch slit grating has the technical defects that: the number of slits in the conventional gradient pitch slit grating must be odd, and only when the slit with the minimum pitch is ensured to be unique, the viewing angle calculation formula which is irrelevant to the number of slits can be obtained. Therefore, the number of picture elements in the corresponding picture element array must be odd.
SUMMERY OF THE UTILITY MODEL
The utility model provides a wide visual angle 3D display device based on gradual change pitch slit grating, as shown in attached figures 1 and 2, which is characterized in that the device comprises a backlight source, a gradual change pitch slit grating and a display screen; the display screen is used for displaying the gradual change pitch image element array; the backlight source, the gradual change pitch slit grating and the display screen are arranged in parallel; the gradually-changed pitch slit grating is positioned between the backlight source and the display screen; the backlight source, the gradual change pitch slit grating and the display screen are correspondingly aligned; backlight, graded pitch slit grating and displayThe horizontal widths of the display screens are the same, and the vertical widths of the backlight source, the gradual change pitch slit grating and the display screen are the same; the number of slits in the gradient pitch slit grating is even, and the number of slits in the gradient pitch slit grating is the firstiPitch of column slitP i Calculated from the following formula
Wherein,pis the pitch of the slit in the middle of the graded pitch slit grating,mis the number of slits in the graded pitch slit grating,lis the viewing distance, the distance between the viewer,gis the distance between the display screen and the slit grating with gradually changed pitch,iis less than or equal tomA positive integer of (d); the pitch of the image elements in the gradual-change pitch image element array is the same as the pitch of the corresponding slits; viewing angle of one-dimensional integrated imaging 3D displayθCalculated from the following formula:
wherein,wis the aperture width of the slit.
Preferably, the graded-pitch slit grating is closely attached to the backlight source.
Drawings
FIG. 1 is a schematic diagram of the structure and parameters of the present invention
FIG. 2 is a schematic view of a gradually-varied pitch slit grating of the present invention
FIG. 3 is a schematic diagram of an image element array according to the present invention
The reference numbers in the figures are:
1. backlight source, 2, gradual pitch slit grating, 3, display screen.
It should be understood that the above-described figures are merely schematic and are not drawn to scale.
Detailed Description
The following detailed description is of an exemplary embodiment of the invention in which the invention is utilized and further detailed. It is necessary to point out here that the following examples are only used for further illustration of the present invention, and should not be understood as limiting the scope of the present invention, and those skilled in the art can make some non-essential improvements and modifications to the present invention according to the above-mentioned contents of the present invention, and still fall into the scope of the present invention.
The utility model provides a wide visual angle 3D display device based on gradual change pitch slit grating, as shown in attached figures 1 and 2, which is characterized in that the device comprises a backlight source, a gradual change pitch slit grating and a display screen; the display screen is used for displaying the gradual change pitch image element array; the backlight source, the gradual change pitch slit grating and the display screen are arranged in parallel; the gradually-changed pitch slit grating is positioned between the backlight source and the display screen; the backlight source, the gradual change pitch slit grating and the display screen are correspondingly aligned; the horizontal widths of the backlight source, the gradual change pitch slit grating and the display screen are the same, and the vertical widths of the backlight source, the gradual change pitch slit grating and the display screen are the same; the number of slits in the gradient pitch slit grating is even, and the number of slits in the gradient pitch slit grating is the firstiPitch of column slitP i Calculated from the following formula
Wherein,pis the pitch of the slit in the middle of the graded pitch slit grating,mis the number of slits in the graded pitch slit grating,lis the viewing distance, the distance between the viewer,gis the distance between the display screen and the slit grating with gradually changed pitch,iis less than or equal tomA positive integer of (d); the pitch of the image elements in the gradual-change pitch image element array is the same as the pitch of the corresponding slits; viewing angle of one-dimensional integrated imaging 3D displayθCalculated from the following formula:
wherein,wis the aperture width of the slit.
Preferably, the graded-pitch slit grating is closely attached to the backlight source.
The pitch of the slit in the middle of the slit grating with gradually changed pitch isp=10mm, aperture width of the slit isw=2, viewing distance ofl=200mm, the distance between the display screen and the slit grating with gradually changed pitch isg=10mm, the number of slits in a graded-pitch slit grating beingm= 10. The pitches of the 1 st to 10 th rows of slits are respectively 14.6mm, 13.3mm, 12.1mm, 11mm, 10mm, 11mm, 12.1mm, 13.3mm and 14.6mm according to the formula (1); according to formula (2) calculation and obtain, the one-dimensional integrated formation of image 3D show watch the visual angle and be 43.
Claims (2)
1. The wide-viewing-angle 3D display device based on the gradual change pitch slit grating is characterized by comprising a backlight source, the gradual change pitch slit grating and a display screen; the display screen is used for displaying the gradual change pitch image element array; the backlight source, the gradual change pitch slit grating and the display screen are arranged in parallel; the gradually-changed pitch slit grating is positioned between the backlight source and the display screen; the backlight source, the gradual change pitch slit grating and the display screen are correspondingly aligned; the horizontal widths of the backlight source, the gradual change pitch slit grating and the display screen are the same, and the vertical widths of the backlight source, the gradual change pitch slit grating and the display screen are the same; the number of slits in the gradient pitch slit grating is even, and the number of slits in the gradient pitch slit grating is the firstiPitch of column slitP i Calculated from the following formula
Wherein,pis the pitch of the slit in the middle of the graded pitch slit grating,mis the number of slits in the graded pitch slit grating,lis the viewing distance, the distance between the viewer,gis the distance between the display screen and the slit grating with gradually changed pitch,iis less than or equal tomA positive integer of (d); the pitch of the image elements in the gradual-change pitch image element array is the same as the pitch of the corresponding slits; viewing angle of one-dimensional integrated imaging 3D displayθCalculated from the following formula:
wherein,wis the aperture width of the slit.
2. The wide-viewing-angle 3D display device based on the gradual-pitch slit grating as claimed in claim 1, wherein the gradual-pitch slit grating is closely attached to the backlight source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020430314.6U CN211454122U (en) | 2020-03-30 | 2020-03-30 | Wide-viewing-angle 3D display device based on gradient pitch slit grating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020430314.6U CN211454122U (en) | 2020-03-30 | 2020-03-30 | Wide-viewing-angle 3D display device based on gradient pitch slit grating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211454122U true CN211454122U (en) | 2020-09-08 |
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| CN202020430314.6U Expired - Fee Related CN211454122U (en) | 2020-03-30 | 2020-03-30 | Wide-viewing-angle 3D display device based on gradient pitch slit grating |
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2020
- 2020-03-30 CN CN202020430314.6U patent/CN211454122U/en not_active Expired - Fee Related
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Granted publication date: 20200908 |
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| CF01 | Termination of patent right due to non-payment of annual fee |