Optical pick-up device
View Patent ↗It is an object of the present invention to provide an optical pick-up device capable of being miniaturized by reducing the number of components. The present invention provides an optical pick-up device including a light-emitting device having an organic compound that emits laser light upon applying current. The light-emitting device interposes an organic compound layer between a pair of electrodes. The organic compound layer, which is a main component, has a layer configuration for emitting a laser beam. In the layer configuration, the thickness of each layer is determined in consideration of the wavelength of laser oscillation. The organic compound layer is composed of a plurality of layers, each of which has different properties such as carrier transportation properties or light-emitting properties. The organic compound layer is preferably formed to have a so-called resonator structure formed via a reflecting layer.
1. An optical pick-up device comprising:
a light-emitting device capable of emitting a laser beam;
an optical system;
a photodetector for converting a light to an electronic signal; and
a signal processing circuit unit comprising a transistor,
wherein the light-emitting device comprises an organic compound layer formed between a pair of substrates, and
wherein the light-emitting device, the photodetector, and the signal processing circuit are formed over a same substrate.
2. An optical pick-up device according to claim 1 ,
wherein an emission spectrum of a light emitted from the organic compound layer has a plurality of emission peaks, and the organic compound layer is formed to have a thickness of half of a specified wavelength or integral multiple of the specified wavelength so as to form a stationary wave with respect to the specified wavelength.
3. An optical pick-up device according to claim 1 ,
wherein the organic compound layer emits a light having a plurality of emission peaks, at least one of the emission peaks having a half band width of at most 10 μm.
4. An optical pick-up device according to claim 1 ,
wherein the light-emitting device is provided with an optical filter, which transmits a light at a specified wavelength, at a light output side.
5. An optical pick-up device according to claim 1 ,
wherein the optical pick-up device is incorporated into a computer or a video reproduction device.
6. An optical pick-up device comprising:
an optical system; and
a base, the base comprising:
a light-emitting device capable of emitting a laser beam;
a photodetector for converting a light to an electric signal; and
a signal processing circuit unit comprising a transistor,
wherein the light-emitting device comprises an organic compound layer formed between a pair of substrates, and
wherein the light-emitting device, the photodetector, and the signal processing circuit are integrally formed.
7. An optical pick-up device according to claim 6 ,
wherein an emission spectrum of a light emitted from the organic compound layer has a plurality of emission peaks, and the organic compound layer is formed to have a thickness of half of a specified wavelength or integral multiple of the specified wavelength so as to form a stationary wave with respect to the specified wavelength.
8. An optical pick-up device according to claim 6 ,
wherein the organic compound layer emits a light having a plurality of emission peaks, at least one of the emission peaks having a half band width of at most 10 μm.
9. An optical pick-up device according to claim 6 ,
wherein the light-emitting device is provided with an optical filter, which transmits a light at a specified wavelength, at a light output side.
10. An optical pick-up device according to claim 6 ,
wherein the optical pick-up device is incorporated into a computer or a video reproduction device.
11. An optical pick-up device comprising:
a first thin film transistor;
a second thin film transistor;
a light-emitting device capable of emitting a laser beam, the light emitting device electrically connected to the first thin film transistor;
a photodetector for converting a light to an electronic signal, the photodetector electrically connected to the second thin film transistor; and
a signal processing circuit unit comprising a third thin film transistor,
wherein the first, second, and third thin film transistors are formed on a same surface.
12. An optical pick-up device according to claim 11 ,
wherein the light-emitting device comprises an organic compound layer formed between a pair of substrates, an emission spectrum of a light emitted from the organic compound layer has a plurality of emission peaks, and the organic compound layer is formed to have a thickness of half of a specified wavelength or integral multiple of the specified wavelength so as to form a stationary wave with respect to the specified wavelength.
13. An optical pick-up device according to claim 11 ,
wherein the light-emitting device comprises an organic compound layer which emits a light having a plurality of emission peaks, at least one of the emission peaks having a half band width of at most 10 μm.
14. An optical pick-up device according to claim 11 ,
wherein the light-emitting device is provided with an optical filter, which transmits a light at a specified wavelength, at a light output side.
15. An optical pick-up device according to claim 11 ,
wherein the optical pick-up device is incorporated into a computer or a video reproduction device.
16. An optical pick-up device comprising:
a light-emitting device capable of emitting a laser beam;
a photodetector for receiving a reflected light from a record medium to convert the reflected light to an electric signal, wherein the reflected light is formed by an irradiation the laser beam from the light-emitting device to the record medium; and
a signal processing circuit unit comprising a transistor,
wherein the light-emitting device comprises an organic compound layer formed between a pair of substrates, and
wherein the light-emitting device, the photodetector, and the signal processing circuit are formed over a same substrate.
17. An optical pick-up device according to claim 16 ,
wherein an emission spectrum of a light emitted from the organic compound layer has a plurality of emission peaks, and the organic compound layer is formed to have a thickness of half of a specified wavelength or integral multiple of the specified wavelength so as to form a stationary wave with respect to the specified wavelength.
18. An optical pick-up device according to claim 16 ,
wherein the organic compound layer emits a light having a plurality of emission peaks, at least one of the emission peaks having a half band width of at most 10 μm.
19. An optical pick-up device according to claim 16 ,
wherein the light-emitting device is provided with an optical filter, which transmits a light at a specified wavelength, at a light output side.
20. An optical pick-up device according to claim 16 ,
wherein the optical pick-up device is incorporated into a computer or a video reproduction device.
21. An optical pick-up device comprising:
a light-emitting device capable of emitting a laser beam;
an optical system for condensing the laser beam emitted from the light-emitting device to irradiate a record medium, and for introducing a reflected light from the record medium to a photodetector;
the photodetector for receiving the reflected light from the record medium to convert the reflected light to an electronic signal; and
a signal processing circuit unit comprising a transistor,
wherein the light-emitting device comprises an organic compound layer formed between a pair of substrates, and
wherein the light-emitting device, the photodetector, and the signal processing circuit are formed over a same substrate.
22. An optical pick-up device according to claim 21 ,
wherein an emission spectrum of a light emitted from the organic compound layer has a plurality of emission peaks, and the organic compound layer is formed to have a thickness of half of a specified wavelength or integral multiple of the specified wavelength so as to form a stationary wave with respect to the specified wavelength.
23. An optical pick-up device according to claim 21 ,
wherein the organic compound layer emits a light having a plurality of emission peaks, at least one of the emission peaks having a half band width of at most 10 μm.
24. An optical pick-up device according to claim 21 ,
wherein the light-emitting device is provided with an optical filter, which transmits a light at a specified wavelength, at a light output side.
25. An optical pick-up device according to claim 21 ,
wherein the optical pick-up device is incorporated into a computer or a video reproduction device.
26. An optical pick-up device comprising:
an optical system for condensing a laser beam emitted from a light-emitting device to irradiate a record medium, and for introducing a reflected light from the record medium to a photodetector; and
a base, the base comprising:
the light-emitting device capable of emitting a laser beam;
the photodetector for receiving the reflected light from the record medium to convert the reflected light to an electric signal; and
a signal processing circuit unit comprising a transistor,
wherein the light-emitting device comprises an organic compound layer formed between a pair of substrates, and
wherein the light-emitting device, the photodetector, and the signal processing circuit are integrally formed.
27. An optical pick-up device according to claim 26 ,
wherein an emission spectrum of a light emitted from the organic compound layer has a plurality of emission peaks, and the organic compound layer is formed to have a thickness of half of a specified wavelength or integral multiple of the specified wavelength so as to form a stationary wave with respect to the specified wavelength.
28. An optical pick-up device according to claim 26 ,
wherein the organic compound layer emits a light having a plurality of emission peaks, at least one of the emission peaks having a half band width of at most 10 μm.
29. An optical pick-up device according to claim 26 ,
wherein the light-emitting device is provided with an optical filter, which transmits a light at a specified wavelength, at a light output side.
30. An optical pick-up device according to claim 26 ,
wherein the optical pick-up device is incorporated into a computer or a video reproduction device.