发明名称 |
VIDEO IMAGE DISPLAY DEVICE, ANTI-CAMCORDING METHOD, AND VIDEO IMAGE DISPLAY SYSTEM |
摘要 |
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
|
申请公布号 |
US2012315018(A1) |
申请公布日期 |
2012.12.13 |
申请号 |
US201113580235 |
申请日期 |
2011.02.25 |
申请人 |
GOHSHI SEIICHI;ECHIZEN ISAO;RESEARCH ORGANIZATION OF INFORMATION AND SYSTEMS;SHARP KABUSHIKI KAISHA |
发明人 |
GOHSHI SEIICHI;ECHIZEN ISAO |
分类号 |
H04N9/80 |
主分类号 |
H04N9/80 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|