VIDEO IMAGE DISPLAY DEVICE, ANTI-CAMCORDING METHOD, AND VIDEO IMAGE DISPLAY SYSTEM
First Claim
1. An anti-camcording device that superposes infrared light on a video image displayed on a video image display section, so as to interfere with illegal camcording of the video image displayed on the video image display section, the anti-camcording device comprising:
- an infrared light source that emits infrared light containing at least light of a wavelength of 780 nm or more, toward the video image display section; and
a wavelength cut filter provided before the infrared light source, which substantially does not transmit a predetermined wavelength component close to a visible light region, among light emitted from the infrared light source.
1 Assignment
0 Petitions
Accused Products
Abstract
Light other than visible light is emitted from a video image display section such as a screen, together with display images, so as to degrade image quality of illegally camcorded video images, thereby making it impossible to use the illegally camcorded image contents. A video image display system includes a projector that generates a display image; and a screen on which the image generated by the projector is projected and displayed. On a backside of the screen, there is provided an infrared ray emitting unit that emits infrared light from a video image display surface during a period while video images are being displayed on the screen. The infrared ray emitting unit includes a wavelength cut filter that substantially does not transmit a predetermined wavelength component close to a visible light region, among the light emitted from the infrared light source
-
Citations
17 Claims
-
1. An anti-camcording device that superposes infrared light on a video image displayed on a video image display section, so as to interfere with illegal camcording of the video image displayed on the video image display section, the anti-camcording device comprising:
-
an infrared light source that emits infrared light containing at least light of a wavelength of 780 nm or more, toward the video image display section; and a wavelength cut filter provided before the infrared light source, which substantially does not transmit a predetermined wavelength component close to a visible light region, among light emitted from the infrared light source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
-
16. An anti-camcording method of superposing infrared light on a video image displayed on a video image display section so as to interfere with illegally camcording of the video image displayed on the video image display section, the anti-camcording method comprising:
-
emitting infrared light containing at least light of a wavelength of 780 nm or more, toward the video image display section from an infrared light source; and with use of a wavelength cut filter provided before the infrared light source, substantially prohibiting a predetermined wavelength component close to a visible light region, among light emitted from the infrared light source, from passing through the wavelength cut filter.
-
-
17. A video image display system comprising:
-
an image formation section that generates a display image according to a video image signal; and a video image display section on which the image generated by the image formation section is displayed, the video image display system further comprising; an infrared light source that emits infrared light containing at least light of a wavelength of 780 nm or more, toward the video image display section; and a wavelength cut filter provided before the infrared light source, which substantially does not transmit a predetermined wavelength component close to a visible light region, among light emitted from the infrared light source.
-
Specification