Title:
PHOTONIC CRYSTAL, DISPLAY PANEL, OPTICAL CONVERSION DEVICE, AND GLASSES
Document Type and Number:
WIPO Patent Application WO/2019/206021
Kind Code:
A1
Abstract:
Disclosed are a photonic crystal, an optical conversion device, a display panel, and glasses. The photonic crystal comprises a first dielectric layer (10) and a second dielectric layer (20) having different refractive indexes, the first dielectric layer (10) and the second dielectric layer (20) are stacked alternately, the thickness and refractive index of the first dielectric layer (10) and the thickness and refractive index of the second dielectric layer (20) are configured such that the photonic crystal prevents blue light with a wavelength of 420 nm to 470 nm from passing through. The display panel is also provided and comprises the photonic crystal, and the photonic crystal is arranged on a light-emitting side of the display panel. By arranging the photonic crystal on the light-emitting side of the display panel, blue light with a wavelength of 420 nm to 470 nm is prevented from being emitted; and the damage of the blue light with a wavelength of 420 nm to 470 nm to human eyes is avoided, thereby protecting the human eyes and achieving healthy display. Meanwhile, the high transmittance characteristics of the photonic crystal also contribute to improving the transmittance of visible light with a wavelength other than 420 nm to 470 nm, and display brightness of the display panel is improved. The optical conversion device and the glasses are also provided and each comprises the photonic crystal, and the blue light with a wavelength of 420 nm to 470 nm can be prevented from entering the human eyes, thus preventing damage to the human eyes.
Inventors:
HU WEIPIN (CN)
HUANG YINGLONG (CN)
WU JUN (CN)
HUANG YINGLONG (CN)
WU JUN (CN)
Application Number:
PCT/CN2019/083278
Publication Date:
October 31, 2019
Filing Date:
April 18, 2019
Export Citation:
Assignee:
BOE TECHNOLOGY GROUP CO LTD (CN)
BEIJING BOE DISPLAY TECH CO (CN)
BEIJING BOE DISPLAY TECH CO (CN)
International Classes:
G02B5/20
Foreign References:
| CN108594345A | 2018-09-28 | |||
| CN104865732A | 2015-08-26 | |||
| CN101479649A | 2009-07-08 | |||
| US20100091224A1 | 2010-04-15 | |||
| US20030186139A1 | 2003-10-02 | |||
| US20090272964A1 | 2009-11-05 | |||
| US20160062178A1 | 2016-03-03 |
Attorney, Agent or Firm:
LIU, SHEN & ASSOCIATES (CN)
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