Source: http://www.google.com/patents/US8132931?dq=6,418,462
Timestamp: 2015-05-04 12:05:31
Document Index: 714319427

Matched Legal Cases: ['art.\n2', 'art.\n6', 'art.\n7', 'art.\n8', 'art.\n9', 'art.\n10', 'art.\n11', 'art.\n18', 'art.\n19', 'art.\n20', 'art.\n21', 'art.\n22', 'art.\n23']

Patent US8132931 - Backlight device and display device - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsIt is an object to manufacture a highly reliable backlight device with less color unevenness and less luminance unevenness, and a high-performance and highly reliable display device including the backlight device, which can display a high quality image. A light emitting diode (LED) is used as a light...http://www.google.com/patents/US8132931?utm_source=gb-gplus-sharePatent US8132931 - Backlight device and display deviceAdvanced Patent SearchPublication numberUS8132931 B2Publication typeGrantApplication numberUS 13/116,169Publication dateMar 13, 2012Filing dateMay 26, 2011Priority dateMar 21, 2006Also published asCN101042481A, CN101042481B, CN102323688A, CN102323689A, CN102878496A, US7731377, US7950816, US8277068, US8733959, US20070221943, US20100245720, US20110228194, US20120168788, US20130003355Publication number116169, 13116169, US 8132931 B2, US 8132931B2, US-B2-8132931, US8132931 B2, US8132931B2InventorsKoji Moriya, Takeshi NishiOriginal AssigneeSemiconductor Energy Laboratory Co., Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (16), Non-Patent Citations (2), Classifications (14), Legal Events (1) External Links: USPTO, USPTO Assignment, EspacenetBacklight device and display device
US 8132931 B2Abstract
a backlight device adjacent to the liquid crystal display panel,
wherein the liquid crystal display panel comprises:
a reflective sheet over the board;
a first light emitting part over the board;
a second light emitting part over the board;
a third light emitting part over the board;
a diffusing plate over the reflective sheet, the first light emitting part, the second light emitting part and the third light emitting part; and
a prism sheet over the diffusing plate,
wherein the first light emitting part, the second light emitting part and the third light emitting part each comprises:
a fluorescent material over the plurality of light emitting diodes,
wherein the first transistor overlaps with the first light emitting part, and
wherein the capacitor overlaps with the third light emitting part.
2. A semiconductor device according to claim 1, wherein the first light emitting part, the second light emitting part and the third light emitting part emit red light, green light and blue light, respectively.
3. A semiconductor device according to claim 1, wherein the first light emitting part, the second light emitting part and the third light emitting part each emits white light.
4. A semiconductor device according to claim 1, wherein colors of the plurality of light emitting diodes of the first light emitting part are different each other.
5. A semiconductor device according to claim 1, wherein the second transistor does not overlap with the first light emitting part.
6. A semiconductor device according to claim 1, wherein the second transistor does not overlap with the third light emitting part.
7. A semiconductor device according to claim 1, wherein the first transistor does not overlap with the second light emitting part.
8. A semiconductor device according to claim 1, wherein the first transistor does not overlap with the third light emitting part.
9. A semiconductor device according to claim 1, wherein the capacitor does not overlap with the first light emitting part.
10. A semiconductor device according to claim 1, wherein the capacitor does not overlap with the second light emitting part.
11. An electric appliance comprising the semiconductor device according to claim 1, wherein the electric appliance comprises one selected from the group consisting of a portable information terminal, a camera, a mobile phone, a television device, and a computer.
12. An electric appliance comprising the semiconductor device according to claim 1, a speaker and a remote control unit.
wherein the first transistor overlaps with the first light emitting part,
wherein the first transistor does not overlap with the second light emitting part,
wherein the second transistor does not overlap with the second light emitting part, and
14. A semiconductor device according to claim 13, wherein the first light emitting part, the second light emitting part and the third light emitting part emit red light, green light and blue light, respectively.
15. A semiconductor device according to claim 13 wherein the first light emitting part, the second light emitting part and the third light emitting part each emits white light.
16. A semiconductor device according to claim 13, wherein colors of the plurality of light emitting diodes of the first light emitting part are different each other.
17. A semiconductor device according to claim 13, wherein the second transistor does not overlap with the first light emitting part.
18. A semiconductor device according to claim 13, wherein the second transistor does not overlap with the third light emitting part.
19. A semiconductor device according to claim 13, wherein the first transistor does not overlap with the second light emitting part.
20. A semiconductor device according to claim 13, wherein the first transistor does not overlap with the third light emitting part.
21. A semiconductor device according to claim 13, wherein the capacitor does not overlap with the first light emitting part.
22. A semiconductor device according to claim 13, wherein the capacitor does not overlap with the second light emitting part.
23. An electric device comprising the semiconductor device according to claim 13, wherein the electric device is one selected from the group consisting of a portable information terminal, a camera, a mobile phone, a television device, and a computer.
24. An electric appliance comprising the semiconductor device according to claim 13, a speaker and a remote control unit. Description
This application is a continuation of application Ser. No. 12/794,908 filed on Jun. 7, 2010 now U.S. Pat. No. 7,950,816 which is a divisional of application Ser. No. 11/725,316 filed on Mar. 19, 2007 (now U.S. Pat. No. 7,731,377 issued Jun. 8, 2010).
A light emitting diode shown in FIG. 18D has a structure in which light emitting elements 430 a, 4306, and 430 c are covered with a cover 431. A structure such that a plurality of light emitting elements are covered with one cover, may be employed. For example, a structure in which a light emitting element 430 a which is a red light emitting diode, a light emitting element 430 b which is a green light emitting diode, and a light emitting element 430 c which is a blue light emitting diode may be covered with one cover may be employed. A cover portion of the light emitting diode may be provided so as to surround the light emitting element without being directly in contact, or the cover portion may be directly in contact with the light emitting element to form a resin or the like as a film. In addition, as shown in FIG. 18A, the covers 411, 421, 422, and 431 may include a fluorescent material or another diffusing substance.
FIG. 16A is a top view showing a structure of a display device of the present invention, in which a pixel portion 2701 including pixels 2702 arranged in matrix, a scanning line input terminal 2703, and a signal line input terminal 2704 are formed over a substrate 2700 with an insulating surface. The number of pixels provided may be determined in accordance with various standards. For example, the number of pixels of XGA for RGB full-color display may be 1024�768�3 (RGB), the number of pixels of UXGA for ROB full-color display may be 1600�1200�3 (RGB), and the number of pixels corresponding to a full-speck high vision for RGB full-color display may be 1920�1080�3 (RGB).
As shown in FIGS. 23 and 14, a pixel region 606, a driving circuit region 608 a which is a scanning line driving circuit, and a driving circuit region 6086 which is a scanning line driving region are sealed with a sealant 692 between a substrate 600 and a counter substrate 695. A driving circuit region 607 which is a signal line driving circuit formed with an IC driver is provided over the substrate 600. A transistor 622 and a capacitor 623 are provided in the pixel region 606. A driving circuit having transistors 620 and 621 is provided in the driving circuit region 608 b. The substrate 600 and the counter substrate 695 are insulating substrates with a light-transmitting property (hereinafter, also referred to as a light-transmitting substrate). The substrate particularly transmits light in a wavelength region of visible light. For example, a glass substrate such as a barium borosilicate glass or alumino borosilicate glass, or a quartz substrate can be used. Alternatively, a substrate formed from plastics represented by polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyethersulfone (PES), and polycarbonate (PC); or a substrate formed from a synthetic resin with flexibility such as acrylic can be employed. Further alternatively, a film (formed from polypropylene, polyester, vinyl, polyvinyl fluoride, or vinyl chloride), a base film (formed from polyester, polyamide, or an inorganic evaporated film), and the like may be used. Although there is a concern that a substrate formed from a synthetic resin generally has a low heat-resistance temperature compared to another substrate, the substrate formed from a synthetic resin can be used when a manufacturing process is carried out with a substrate with high heat resistance and then the substrate formed from a synthetic resin displaces the substrate with high heat resistance.
When light is emitted from the light emitting diode, the temperature in the backlight device changes. A temperature sensor is provided in the backlight device to monitor a temperature condition, the thermoelectric element carries out cooling or heating by a driving circuit for driving the thermoelectric element, and the temperature is controlled with a temperature controller in the following manner Further, a color sensor for monitoring output of the light emitting diode is provided, and the output of the light emitting diode is controlled by a light emitting diode controlling device for controlling the output of the light emitting diode. The light emitting diode is driven by a light emitting diode driving circuit.
The semiconductor layer can be formed with use of an organic semiconductor material as a semiconductor, by a vapor deposition method, a printing method, a spray method, a spin coating method, a droplet discharge method, a dispenser method, or the like. In this case, since an etching step is not always necessary, the number of steps can be reduced. As an organic semiconductor, a low molecular material such as pentacene or a high molecular material can be used, or a material such as an organic pigment or a conductive high molecular organic material can be used. As an organic semiconductor material used in the present invention, a t-conjugated high molecular material with its skeleton including a conjugate double bond is desirable. Typically, a high molecular material which is soluble in a liquid such as polythiophene, polyfluorene, poly(3-alkylthiophene), or a polythiophene derivative can be used.
It is needles to say that the present invention is not limited to a television device. The present invention can be applied to various applications such as a monitor of a personal computer, and particularly, a large display media typified by an infatuation screen at train stations, airports, or the like, and an advertising display screen on the street.
This application is based on Japanese Patent Application serial no. 2006-077879 filed in Japan Patent Office on Mar. 21, in 2006, the entire contents of which are hereby incorporated by reference.
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