A transparent projection display device

Abstract

The present invention proposes a transparent projection display device. The transparent projection display device is composed of a projector and a polymer dispersed liquid crystal screen; the projector projects an image on the polymer dispersed liquid crystal screen; the polymer dispersed liquid crystal screen is composed of polymer dispersed liquid crystal pixels arranged in rows and columns, and each pixel can be switched between a scattering state and a transparent state; the pixels in the transparent state on the polymer dispersed liquid crystal screen can be used to view things behind the screen; the pixels in the scattering state on the polymer dispersed liquid crystal screen are used to scatter and display the image projected by the projector; the control of each pixel on the polymer dispersed liquid crystal screen is consistent with the control of a traditional TFT liquid crystal display, and is driven by a thin film transistor active matrix; the projector is used to project an image; the image projected by the projector can be scattered by the pixels in the scattering state on the polymer dispersed liquid crystal screen, and displayed.

Description

Technical Field

[0001] The present invention relates to display technology, and more particularly, to projection display technology. Background Art

[0002] A projection display device can project images onto a screen, and has advantages in screen size over conventional flat panel display devices. Conventional projection devices are generally unable to achieve transparent projection display, i.e. viewers cannot see what is behind the projection screen. Therefore, the present invention proposes a transparent projection display device. Summary of the invention

[0003] The present invention provides a transparent projection display device. Figure 1 The transparent projection display device is a schematic diagram of the structure of the transparent projection display device. The transparent projection display device is composed of a projector and a polymer dispersed liquid crystal screen. The projector projects an image onto the polymer dispersed liquid crystal screen.

[0004] Furthermore, the polymer dispersed liquid crystal screen is composed of polymer dispersed liquid crystal pixels arranged in rows and columns, and each pixel can be switched between a scattering state and a transparent state. The pixels in the transparent state on the polymer dispersed liquid crystal screen can be used to view things behind the screen; the pixels in the scattering state on the polymer dispersed liquid crystal screen are used to scatter and display the image projected by the projector. The control of each pixel on the polymer dispersed liquid crystal screen is consistent with the control of a traditional TFT liquid crystal display, and is driven by a thin film transistor active matrix. The projector is used to project an image. The image projected by the projector can be scattered by the pixels in the scattering state on the polymer dispersed liquid crystal screen and displayed.

[0005] Furthermore, when the present invention is used to project and display an image, the image can be divided into a transparent area and a display area. The transparent area is used to view things behind the polymer dispersed liquid crystal screen, and the display area is used to display and express the content of the projected image. The pixels corresponding to the transparent area on the polymer dispersed liquid crystal screen are set to a transparent state; the pixels corresponding to the display area are set to a scattered state. At the same time, the projector projects the image onto the polymer dispersed liquid crystal screen, and the area where the image is projected is aligned with the area where the screen is located. The alignment process can be achieved by existing technologies such as trapezoidal automatic calibration and area automatic calibration of the projector, and can also be achieved by fixing the relative position of the projector and the polymer dispersed liquid crystal screen. Finally, the projector projects the projected image content onto the polymer dispersed liquid crystal pixels in a scattered state to achieve projection display.

[0006] In the present invention, since the polymer dispersed liquid crystal screen can make part of the pixels transparent, the viewer can see the objects behind the screen, thereby realizing transparent projection display. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0008] Figure 1 It is a schematic diagram of the structure of the present invention.

[0009] Figure 2 It is the image projected by the projector of the present invention and the transparent scattering state on the polymer dispersed liquid crystal screen.

[0010] Figure 3 A schematic diagram showing imaging according to the present invention.

[0011] Icons: 010-transparent projection display device; 100-polymer dispersed liquid crystal screen; 200-projector; 210-image projected by the projector; 110-transparent scattering state of the polymer dispersed liquid crystal screen; 111-scattering pixel; 112-transparent pixel.

[0012] It should be understood that the above drawings are only schematic and are not drawn to scale. DETAILED DESCRIPTION

[0013] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0014] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0016] In the description of the embodiments of the present invention, it should be noted that the terms “first”, “second”, etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0017] Example 1

[0018] Figure 1 The transparent projection display device 010 provided in this embodiment is a schematic diagram of the structure. In the figure, the x coordinate represents the horizontal direction in space, the y coordinate represents the vertical direction in space, and the z coordinate represents the direction perpendicular to the xy plane. The transparent projection display device 010 is composed of a polymer dispersed liquid crystal screen 100 and a projector 200. The projector 200 projects an image onto the polymer dispersed liquid crystal screen 100.

[0019] Please refer to Figure 1 The polymer dispersed liquid crystal screen 100 is composed of 8×16 polymer dispersed liquid crystal pixels arranged in rows and columns, and each pixel can be switched between a scattering state and a transparent state. The pixels in the transparent state on the polymer dispersed liquid crystal screen can be used to view things behind the screen; the pixels in the scattering state on the polymer dispersed liquid crystal screen are used to scatter and display the image projected by the projector. The control of each pixel on the polymer dispersed liquid crystal screen 100 is consistent with the control of a traditional TFT liquid crystal display, and is driven by a thin film transistor active matrix. The projector 200 is used to project an image. The image projected by the projector 200 can be scattered by the pixels in the scattering state on the polymer dispersed liquid crystal screen 100 and displayed.

[0020] Please refer to Figure 2 The present invention is now used to project and display an image 210, and the image 210 displays the number "1". The part of the number "1" is the display area, which will be imaged on the polymer dispersed liquid crystal screen 100; the rest is a transparent area for viewing the objects behind the polymer dispersed liquid crystal screen.

[0021] Please refer to Figure 2 In the transparent scattering state 110 of the polymer dispersed liquid crystal screen, the pixels corresponding to the transparent area are set to the transparent state, namely the transparent pixels 112; and the pixels corresponding to the pixels used to display the number "1" are set to the scattering state, namely the scattering pixels 111.

[0022] At the same time, the projector 200 projects the image 210 onto the polymer dispersed liquid crystal screen, and the image projection area is aligned with the area where the screen is located. The alignment process is achieved by existing technologies such as trapezoidal automatic calibration and regional automatic calibration of the projector.

[0023] At this time, the image display content number "1" will be projected onto the polymer dispersed liquid crystal pixel 111 in a scattering state, thereby realizing projection display.

[0024] Please refer to Figure 3 At this time, the number "1" can be displayed on the polymer dispersed liquid crystal screen 100, and the remaining pixels are transparent, so the viewer can see the cylinder behind the polymer dispersed liquid crystal screen 100.

[0025] In summary, since the polymer dispersed liquid crystal screen 100 can make some pixels transparent, the viewer can see the objects behind the screen, thereby realizing transparent projection display.

Claims

1. A transparent projection display device, characterized in that: The transparent projection display device is composed of a projector and a polymer dispersed liquid crystal screen; the projector projects an image onto the polymer dispersed liquid crystal screen; the polymer dispersed liquid crystal screen is composed of polymer dispersed liquid crystal pixels arranged in rows and columns, and each pixel can be switched between a scattering state and a transparent state; the pixels in the transparent state on the polymer dispersed liquid crystal screen can be used to view things behind the screen; the pixels in the scattering state on the polymer dispersed liquid crystal screen are used to scatter and display the image projected by the projector; the control of each pixel on the polymer dispersed liquid crystal screen is consistent with the control of a traditional TFT liquid crystal display, and is driven by a thin film transistor active matrix; the projector is used to project an image; the image projected by the projector can be scattered by the pixels in the scattering state on the polymer dispersed liquid crystal screen and displayed; when used to project and display an image, the image can be divided into a transparent area and a display area; The transparent area is used to view objects behind the polymer dispersed liquid crystal screen, and the display area is used to display and express the content of the projected image; the pixels corresponding to the transparent area on the polymer dispersed liquid crystal screen are set to a transparent state, and the pixels corresponding to the display area are set to a scattering state; at the same time, the projector projects the image onto the polymer dispersed liquid crystal screen, and the area where the image is projected is aligned with the area where the screen is located; finally, the projector projects the projection image content onto the polymer dispersed liquid crystal pixels in a scattering state to achieve projection display.

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