Display device
View Patent ↗A display device of the present invention has light-emitting devices making up a plurality of pixels placed in a matrix form. In the display device of the present invention, the light-emitting devices each possesses an emissive layer and a reflective element placed on the rear surface of the emissive layer; the emissive layer possesses at the said of the front side, a polarization separator which separates the light emitted from the emissive layer into two kinds of polarized components by the reflection and the transmission, and phase plate; the emissive layer substantially maintains the sate of the polarization of the light transmitted there-through; the reflective element at least reflects the circularly polarized light impinging in the vertical direction mainly as a circularly polarized light having a reverse helicity direction; and the polarization separator has a reflectance of the wavelength range from 520 nm to 600 nm smaller than a reflectance of range not more than 540 nm.
1. A display device comprising blue, green, and red light-emitting devices making up a plurality of pixels placed in a matrix form, wherein the blue, red, and green light-emitting devices each comprise:
a reflective element, an emissive layer, a phase plate, and a polarizer in this order, and further comprise a polarization separator between the emissive layer and the phase plate, which separates light into two kinds of polarized light components by reflection and transmission, and a dividing wall between the light-emitting device and an adjoining one of the light-emitting devices, wherein
the polarization separator has a reflectance of the wavelength range from 520 nm to 600 nm smaller than a reflectance of wavelength range not more than 510 nm, and wherein
the dividing wall serves as means for preventing the reflection of the light having a wavelength corresponding to the wavelength range at which the polarization separator reflects.
2. The light-emitting device according to claim 1 , wherein the emissive layer of at least one of the red and green light-emitting devices comprises a phosphorescent material.
3. The light-emitting device according to claim 1 , wherein the dividing wall comprises a photosensitive resin material.
4. The light-emitting device according to claim 1 , wherein the dividing wall comprises a photosensitive resin material which comprises a light-absorbing pigment or dye dispersed therein.
5. A display device comprising blue, green, and red light-emitting devices making up a plurality of pixels placed in a matrix form, wherein the blue, red, and green light-emitting devices each comprise:
a reflective element, an emissive layer, a phase plate, and a polarizer in this order, and further comprise a polarization separator between the emissive layer and the phase plate, which separates light into two kinds of polarized light components by reflection and transmission, and a dividing wall between the light-emitting device and an adjoining one of the light-emitting devices, wherein
the polarization separator has a reflectance of the wavelength range of blue light higher than a reflectance of wavelength 555 nm, and wherein
the dividing wall serves as means for preventing the reflection of the light having a wavelength corresponding to the wavelength range at which the polarization separator reflects.
6. The light-emitting device according to claim 5 , wherein the emissive layer of at least one of the red and green light-emitting devices comprises a phosphorescent material.
7. The light-emitting device according to claim 5 , wherein the dividing wall comprises a photosensitive resin material.
8. The light-emitting device according to claim 5 , wherein the dividing wall comprises a photosensitive resin material which comprises a light-absorbing pigment or dye dispersed therein.
9. A display device comprising blue, green, and red light-emitting devices making up a plurality of pixels placed in a matrix form, wherein the blue, red, and green light-emitting devices each comprise:
a reflective element, an emissive layer, a phase plate, and a polarizer in this order, and further comprise a linear polarization separator between phase plate and the polarizer, which separates light into two kinds of polarized light components by reflection and transmission, and a dividing wall between the light-emitting device and an adjoining one of the light-emitting devices, wherein
the phase plate comprises a quarter wave plate,
the linear polarization separator has a reflectance of the wavelength range from 520 nm to 600 nm smaller than a reflectance of wavelength range not more than 510 nm, and
the dividing wall serves as means for preventing the reflection of the light having a wavelength corresponding to the wavelength range at which the linear polarization separator reflects.
10. The light-emitting device according to claim 9 , wherein the emissive layer of at least one of the red and green light-emitting devices comprises a phosphorescent material.
11. The light-emitting device according to claim 9 , wherein the dividing wall comprises a photosensitive resin material.
12. The light-emitting device according to claim 9 , wherein the dividing wall comprises a photosensitive resin material which comprises a light-absorbing pigment or dye dispersed therein.
13. A display device comprising blue, green, and red light-emitting devices making up a plurality of pixels placed in a matrix form,
wherein the blue, red, and green light-emitting devices each comprise:
a reflective element, an emissive layer, a phase plate, and a polarizer in this order, and further comprise a polarization separator between the phase plate and the polarizer, which separates light into two kinds of polarized light components by reflection and transmission, wherein
the polarization separator has a reflectance of a wavelength ranges from 520 nm to 600 nm smaller than a reflectance of range not more than 510 nm, and wherein
the emissive layer of at least one of the red and green light-emitting devices comprises a phosphorescent material,
wherein said polarization separator is a linear polarization separator, which reflects a linearly polarized light having a prescribed wavelength range, and transmits lights other than said linearly polarized light having a prescribed wavelength range; said phase plate comprises a quarter wave plate.