Blue light compensation film and OLED display
View Patent ↗The present invention provides a blue light compensation film and an OLED display. The blue light compensation film of the present invention effectively absorbs blue light with wavelength longer than blue wavelength and excite blue light by using a blue light upconversion luminescent material, and effectively improves color shift white OLED device caused by short lifespan of blue electroluminescent material to achieve blue light compensation of the white OLED device and solve the of yellowing in traditional OLED display with age. The OLED display of the present invention comprises the blue light compensation film to avoid color shift problem and provides good display quality.
1. A blue light compensation film, which comprises, from the bottom up in a stack, an adhesive layer, a first transparent film, and a second transparent film;
the blue light compensation film satisfying following condition:
the second transparent film being doped with a blue light upconversion luminescent material;
the blue light upconversion luminescent material comprising at least one of an upconversion organic luminescent material based on a triplet-triplet annihilation and a host material doped with a rare earth ion; the blue light upconversion luminescent material being capable of absorbing light with wavelength greater than the blue light wavelength and converting to blue light.
2. The blue light compensation film as claimed in claim 1 , wherein the blue light upconversion luminescent material absorbs light with wavelength greater than 630 nm and converts to blue light of wavelength 460 nm-490 nm.
3. The blue light compensation film as claimed in claim 1 , wherein the upconversion organic luminescent material based on the triplet-triplet annihilation comprises at least one of a combination of bipyridine ruthenium and 9,10-diphenylanthracene, and a combination of tetraphenylporphyrin platinum and perylen;
the bipyridine ruthenium has a structure of
the 9,10-diphenylanthracene has a structure of
the tetraphenylporphyrin platinum has a structure of
the perylen has a structure of
4. The blue light compensation film as claimed in claim 1 , wherein in the host material doped with rare earth ion, the host material comprises at least one of a halogen compound, an oxide, an oxyhalide, a sulfur-containing compound, and a sulfur oxide; the rare earth ions comprises at least one of Er3+, Tm3+, Dy3+, Tb3+, Ho3+, and Eu3+.
5. The blue light compensation film as claimed in claim 1 , wherein the first transparent film and the second transparent film respectively comprise one or more of a polyethylene terephthalate film, a polyimide film, a cellulose triacetate film, and a cycloolefin polymer film; wherein the first transparent film and the second transparent film are a composite film of a single layer film or a multi-layer film, respectively.
6. The blue light compensation film as claimed in claim 1 , wherein the material for the adhesive layer comprises a pressure-sensitive adhesive.
7. The blue light compensation film as claimed in claim 1 , wherein no blue transparent luminescent material is provided between the first transparent film and the second transparent film, and the first transparent film and the second transparent film are a single unitary transparent film.
8. An organic light-emitting diode (OLED) display, which comprises: an OLED device, and a blue light compensation film provided at the light-emitting side of the OLED device; the blue light compensation film is a blue light compensation film described in claim 1 and the blue light compensation film is attached to light-emitting side of the OLED device by the adhesive layer.
9. The OLED display as claimed as in claim 8 , wherein the light emitted by the OLED device is white light, the luminescent material of the OLED device comprises a red electroluminescent material, a green electroluminescent material and a blue electroluminescent material; the white light emitted by the OLED device is formed by mixing the red light emitted by the electroluminescent material, the green light emitted by the green electroluminescent material, and the blue light emitted by the blue electroluminescent material.