El display device and method for manufacturing the same

• US 20050162092A1
• Filed: 03/01/2005
• Published: 07/28/2005
• Est. Priority Date: 09/17/1999
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Konuma, Toshimitsu, Yamazaki, Shunpei, Mizukami, Mayumi
• Granted Patent: US 7,518,146 B2
• Time in Patent Office: Days
• US Class Current: 315/169.300
• CPC Class Codes: H01L 27/1218 with a particular composition or structure of the substrate
• CPC Class Codes: H01L 27/124 with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits wiring structures per se H01L23/52
• CPC Class Codes: H10K 2102/3026 Top emission
• CPC Class Codes: H10K 50/841 Self-supporting sealing arrangements
• CPC Class Codes: H10K 50/8426 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 50/844 Encapsulations
• CPC Class Codes: H10K 50/846 comprising getter material or desiccants
• CPC Class Codes: H10K 50/865 comprising light absorbing layers, e.g. light-blocking layers
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 59/1213 the pixel elements being TFTs
• CPC Class Codes: H10K 59/123 Connection of the pixel electrodes to the thin film transistors [TFT]
• CPC Class Codes: H10K 59/124 Insulating layers formed between TFT elements and OLED elements
• CPC Class Codes: H10K 59/126 Shielding, e.g. light-blocking means over the TFTs
• CPC Class Codes: H10K 59/131 Interconnections, e.g. wiring lines or terminals
• CPC Class Codes: H10K 59/38 comprising colour filters or colour changing media [CCM]
• CPC Class Codes: H10K 59/8722 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 59/873 Encapsulations
• CPC Class Codes: H10K 59/874 including getter material or desiccant
• CPC Class Codes: H10K 59/8792 comprising light absorbing layers, e.g. black layers
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass

Abstract

Plurality of pixels (102) are arranged on the substrate. Each of the pixels (102) is provided with an EL element which utilizes as a cathode a pixel electrode (105) connected to a current control TFT (104). On a counter substrate (110), a light shielding film (112) is disposed at the position corresponding to periphery of each pixel (102), while a color filter (113) is disposed at the position corresponding to each of the pixels (102). This light shielding film makes the contour of the pixels clear, resulting in an image display with high definition. In addition, it is possible to fabricate the EL display device of the present invention with most of an existing manufacturing line for liquid crystal display devices. Thus, an amount of equipment investment can be significantly reduced, thereby resulting in a reduction in the total manufacturing cost.

Claims

1-33. -33. (canceled)

34. An EL display device, comprising:

an active matrix substrate on which a plurality of pixels are arranged, each of the pixels including a TFT and an EL element; and

a counter substrate opposed to the active matrix substrate,

wherein the counter substrate is provided with;

a light shielding film disposed at first positions respectively corresponding to peripheries of the respective pixels on the active matrix substrate; and

a first color filter for obtaining red light, a second color filter for obtaining green light, and a third color filter for obtaining blue light each disposed at second position corresponding to one of the plurality of pixels on the active matrix substrate.

35. The EL display device according to claim 34, wherein at least one of the first, second and third color filters comprises a resin.

36. The EL display device according to claim 34, wherein the light shielding film comprises titanium.

37. The EL display device according to claim 34, wherein the EL element includes a light emitting layer comprising a polymer type organic material.

38. The EL display device according to claim 34, wherein the EL display device is used for a display portion of an electronic device selected from a group consisting of a video camera, a head mount type display, a DVD, a portable computer, a personal computer, a portable telephone and a car audio equipment.

39. An EL display device, comprising:

an active matrix substrate on which a plurality of pixels are arranged, each of the pixels including a TFT and an EL element; and

a counter substrate opposed to the active matrix substrate adhered to the active matrix substrate by a sealing agent,

wherein the counter substrate is provided with;

a light shielding film disposed at first positions respectively corresponding to peripheries of the respective pixels on the active matrix substrate; and

a first color filter for obtaining red light, a second color filter for obtaining green light, and a third color filter for obtaining blue light each disposed at second position corresponding to one of the plurality of pixels on the active matrix substrate.

40. The EL display device according to claim 39, wherein at least one of the first, second and third color filters comprises a resin.

41. The EL display device according to claim 39, wherein the light shielding film comprises titanium.

42. The EL display device according to claim 39, wherein the EL element includes a light emitting layer made of a polymer type organic material.

43. The EL display device according to claim 39, wherein the EL display device is used for a display portion of an electronic device selected from a group consisting of a video camera, a head mount type display, a DVD, a portable computer, a personal computer, a portable telephone and a car audio equipment.

44. An EL display device, comprising:

an active matrix substrate on which a plurality of pixels are arranged, each of the pixels including a TFT and an EL element; and

a counter substrate opposed to the active matrix substrate adhered to the active matrix substrate by a sealing agent,

wherein a space enclosed by active matrix substrate, the counter substrate and the sealing agent is filled with a transparent adhesive, and

wherein the counter substrate is provided with;

a light shielding film disposed at first positions respectively corresponding to peripheries of the respective pixels on the active matrix substrate; and

a first color filter for obtaining red light, a second color filter for obtaining green light, and a third color filter for obtaining blue light each disposed at second position corresponding to one of the plurality of pixels on the active matrix substrate.

45. The EL display device according to claim 44, wherein at least one of the first, second and third color filters comprises a resin.

46. The EL display device according to claim 44, wherein the light shielding film comprises titanium.

47. The EL display device according to claim 44, wherein the EL element includes a light emitting layer made of a polymer type organic material.

48. The EL display device according to claim 44, wherein the EL display device is used for a display portion of an electronic device selected from a group consisting of a video camera, a head mount type display, a DVD, a portable computer, a personal computer, a portable telephone and a car audio equipment.