Projection screen and projection system

Patent metadata

Field	Value
Publication number	US-10564536-B2
Application number	US-201816133426-A
Country	US
Kind code	B2
Filing date	Sep 17, 2018
Priority date	Sep 20, 2017
Publication date	Feb 18, 2020
Grant date	Feb 18, 2020

Abstract

A projection screen for receiving a visible image beam and an ultraviolet beam from a projection device is provided. The projection screen includes a substrate, an anti-reflection layer and an anti-ultraviolet layer. The substrate includes a first surface adjacent to the projection device, a second surface away from the projection device and opposite to the first surface, a scattering reflection layer disposed between the first surface and the second surface, and an ultraviolet absorption layer disposed between the first surface and the second surface. The scattering reflection layer scatters and reflects the visible image beam. The ultraviolet absorption layer absorbs the ultraviolet beam so as to be changed from a transparent state to an opaque state. The anti-reflection layer is disposed on the first surface. The anti-ultraviolet layer is disposed at the second surface. The ultraviolet absorption layer is located between the scattering reflection layer and the anti-ultraviolet layer.

First claim

What is claimed is:

1. A projection screen for receiving a visible image beam and an ultraviolet beam provided by a projection device, the projection screen comprising:
a substrate, comprising:
a first surface, adjacent to the projection device;
a second surface, away from the projection device and opposite to the first surface;
a scattering reflection layer, disposed between the first surface and the second surface, wherein the scattering reflection layer is for scattering and reflecting the visible image beam; and
an ultraviolet absorption layer, disposed between the first surface and the second surface, wherein the scattering reflection layer is located between the first surface and the ultraviolet absorption layer, and the ultraviolet absorption layer is for absorbing the ultraviolet beam so as to be changed from a transparent state to a black state;

an anti-reflection layer, disposed on the first surface; and
an anti-ultraviolet layer, disposed at the second surface, wherein the ultraviolet absorption layer is located between the scattering reflection layer and the anti-ultraviolet layer.

2. The projection screen according to claim 1 , wherein the anti-ultraviolet layer is disposed in the substrate, and the anti-ultraviolet layer is located between the second surface and the ultraviolet absorption layer.

3. The projection screen according to claim 1 , wherein the scattering reflection layer comprises a plurality of microstructures, the plurality of microstructures have a plurality of inclined surfaces facing the projection device, and the plurality of microstructures scatter and reflect the visible image beam by the plurality of inclined surfaces.

4. The projection screen according to claim 3 , wherein a light transmittance of the plurality of microstructures is 75%.

5. The projection screen according to claim 3 , wherein a material of the plurality of microstructures is a metal.

6. The projection screen according to claim 1 , wherein a material of the substrate comprises plastic and glass.

7. The projection screen according to claim 1 , wherein the ultraviolet beam provided by the projection device has a wavelength range between 100 nm and 400 nm.

8. The projection screen according to claim 1 , wherein the ultraviolet beam provided by the projection device comprises image information.

9. A projection system, comprising:
a projection device, for providing a visible image beam and an ultraviolet beam; and
a projection screen, for receiving the visible image beam and the ultraviolet beam provided by the projection device, the projection screen comprising:
a substrate, comprising:
a first surface, adjacent to the projection device;
a second surface, away from the projection device and opposite to the first surface;
a scattering reflection layer, disposed between the first surface and the second surface, wherein the scattering reflection layer is for scattering and reflecting the visible image beam; and
an ultraviolet absorption layer, disposed between the first surface and the second surface, wherein the scattering reflection layer is located between the first surface and the ultraviolet absorption layer, and the ultraviolet absorption layer is for absorbing the ultraviolet beam so as to be changed from a transparent state to a black state;

an anti-reflection layer, disposed on the first surface; and
an anti-ultraviolet layer, disposed at the second surface, wherein the ultraviolet absorption layer is located between the scattering reflection layer and the anti-ultraviolet layer.

10. The projection system according to claim 9 , wherein the projection device comprises:
a first illumination system, for emitting an illumination beam;
a second illumination system, for emitting the ultraviolet beam;
a first light valve, located on a transmission path of the illumination beam and for converting the illumination beam into the visible image beam;
a lens, located on a transmission path of the visible image beam and the ultraviolet beam, wherein the lens is for projecting the visible image beam onto the projection screen to form an image frame area and for projecting the ultraviolet beam onto the projection screen to form a black area, and the image frame area is partially overlapped with the black area; and
a processor, electrically connected to the first illumination system and the second illumination system, wherein the processor is for controlling the first illumination system to emit the illumination beam and simultaneously controlling the second illumination system to emit the ultraviolet beam.

11. The projection system according to claim 10 , wherein the first light valve is for causing the ultraviolet beam to comprise image information, the lens is for projecting the ultraviolet beam comprising the image information onto the projection screen so as to form the black area on a part of the projection screen.

12. The projection system according to claim 10 , wherein the processor is electrically connected to the first light valve, and the processor is for controlling the first light valve to convert the illumination beam into the visible image beam.

13. The projection system according to claim 10 , wherein the first illumination system comprises a first light source module and a first beam transmission module, the first beam transmission module is located between the first light source module and the first light valve, the first light source module is for emitting the illumination beam, the first beam transmission module is for transmitting the illumination beam to the first light valve, wherein the second illumination system comprises a second light source module and a second beam transmission module, the second beam transmission module is located between the second light source module and the lens, the second light source module is for emitting the ultraviolet beam, and the second beam transmission module is for transmitting the ultraviolet beam to the lens.

14. The projection system according to claim 13 , wherein the projection device further comprises a second light valve, the second light valve is located on a transmission path of the ultraviolet beam and located between the second beam transmission module and the lens, the second light valve is for causing the ultraviolet beam to comprise image information, and the lens is for projecting the ultraviolet beam comprising the image information onto the projection screen to form the black area on a part of the projection screen.

15. The projection system according to claim 14 , wherein the processor is electrically connected to the second light valve, and the processor is for controlling the second light valve to cause the ultraviolet beam to comprise the mage information.

16. The projection system according to claim 9 , wherein the projection device comprises:
a first projector, for emitting the visible image beam to the projection screen to form an image frame area on the projection screen;
a second projector, for emitting the ultraviolet beam to the projection screen to form a black area on the projection screen, wherein the image frame area is partially overlapped with the black area;
a first processor, disposed in the first projector and for controlling the first projector to emit the visible image beam; and
a second processor, disposed in the second projector and electrically connected to the first processor, wherein the second processor is for controlling the second projector to emit the ultraviolet beam and issuing a control signal to the first processor, so that the first processor controls the first projector to

Assignees

• Coretronic Corp

Inventors

• Pan Haw-Woei
• Tsai Chih-Hsien
• Weng Yi-Hsuang
• Hsieh Chi-Tang
• Hsu Jo-Han

Classifications

• H04N9/3164

  using multiple light sources · CPC title

• G03B21/10

  Projectors with built-in or built-on screen · CPC title

• H04N9/3105

  for displaying all colours simultaneously, e.g. by using two or more electronic spatial light modulators (simultaneous projection in colour photography G03B33/10; beam splitting or combining systems per se G02B27/10) · CPC title

• G03B21/62 Primary

  Translucent screens · CPC title

• G03B21/56

  Projection screens · CPC title