Active matrix display device with improved operating performance
First Claim
Patent Images
1. A display device comprising:
- a substrate;
a base film over the substrate;
a plurality of pixel regions over the base film, wherein each of the plurality of pixel regions comprisesa first thin film transistor which has a first active layer, a first source electrode, and a first drain electrode,a second thin film transistor which has a second active layer, a second source electrode, a second drain electrode, and a gate electrode,a pixel electrode electrically connected to the second source electrode or the second drain electrode,a light emitting layer comprising an organic material formed over the pixel electrode, anda second electrode over the light emitting layer comprising the organic material;
a driving circuit for driving the plurality of pixel regions, the driving circuit comprising a third thin film transistor over the substrate; and
a housing material opposed to the substrate and adhered to the substrate by an adhesive, thereby forming an airtight space between the substrate and the housing material,wherein the base film is interposed between the substrate and the adhesive and in contact with the adhesive,wherein one of the first source electrode and the first drain electrode is connected to the gate electrode of the second thin film transistor,wherein the first thin film transistor has a multi gate structure in which the first active layer has a plurality of channel regions connected in series, andwherein the plurality of pixel regions and at least a part of the driving circuit are located in a region surrounded by the adhesive.
0 Assignments
0 Petitions
Accused Products
Abstract
An object of the present invention is to provide an EL display device having a high operation performance and reliability.
The switching TFT 201 formed within a pixel has a multi-gate structure, which is a structure which imposes an importance on reduction of OFF current value. Further, the current control TFT 202 has a channel width wider than that of the switching TFT to make a structure appropriate for flowing electric current. Morever, the LDD region 33 of the current control TFT 202 is formed so as to overlap a portion of the gate electrode 35 to make a structure which imposes importance on prevention of hot carrier injection and reduction of OFF current value.
273 Citations
42 Claims
-
1. A display device comprising:
-
a substrate; a base film over the substrate; a plurality of pixel regions over the base film, wherein each of the plurality of pixel regions comprises a first thin film transistor which has a first active layer, a first source electrode, and a first drain electrode, a second thin film transistor which has a second active layer, a second source electrode, a second drain electrode, and a gate electrode, a pixel electrode electrically connected to the second source electrode or the second drain electrode, a light emitting layer comprising an organic material formed over the pixel electrode, and a second electrode over the light emitting layer comprising the organic material; a driving circuit for driving the plurality of pixel regions, the driving circuit comprising a third thin film transistor over the substrate; and a housing material opposed to the substrate and adhered to the substrate by an adhesive, thereby forming an airtight space between the substrate and the housing material, wherein the base film is interposed between the substrate and the adhesive and in contact with the adhesive, wherein one of the first source electrode and the first drain electrode is connected to the gate electrode of the second thin film transistor, wherein the first thin film transistor has a multi gate structure in which the first active layer has a plurality of channel regions connected in series, and wherein the plurality of pixel regions and at least a part of the driving circuit are located in a region surrounded by the adhesive. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A display device comprising:
-
a substrate; a base film over the substrate; a plurality of pixel regions over the base film, wherein each of the plurality of pixel regions comprises a first thin film transistor which has a first active layer, a first source electrode, and a first drain electrode, a second thin film transistor which has a second active layer, a second source electrode, a second drain electrode, and a gate electrode, a pixel electrode electrically connected to the second source electrode or the second drain electrode, a light emitting layer comprising an organic material formed over the pixel electrode, and a second electrode over the light emitting layer comprising the organic material; a driving circuit for driving the plurality of pixel regions, the driving circuit comprising a third thin film transistor over the substrate; and a glass opposed to the substrate and adhered to the substrate by an adhesive, thereby forming an airtight space between the substrate and the glass, wherein the base film is interposed between the substrate and the adhesive and in contact with the adhesive, wherein one of the first source electrode and the first drain electrode is connected to the gate electrode of the second thin film transistor, wherein the first thin film transistor has a multi gate structure in which the first active layer has a plurality of channel regions connected in series, and wherein the plurality of pixel regions and at least a part of the driving circuit are located in a region surrounded by the adhesive. - View Dependent Claims (8, 9, 10, 11, 12)
-
-
13. A display device comprising:
-
a substrate; a base film over the substrate; a plurality of pixel regions over the base film, wherein each of the plurality of pixel regions comprises a first thin film transistor which has a first active layer, a first source electrode, and a first drain electrode, a second thin film transistor which has a second active layer, a second source electrode, a second drain electrode, and a gate electrode, a pixel electrode electrically connected to the second source electrode or the second drain electrode, a light emitting layer comprising an organic material formed over the pixel electrode, and a second electrode over the light emitting layer comprising the organic material; a driving circuit for driving the plurality of pixel regions, the driving circuit comprising a third thin film transistor over the substrate; and a housing material opposed to the substrate and adhered to the substrate by epoxy resin, thereby forming an airtight space between the substrate and the housing material, wherein the base film is interposed between the substrate and the adhesive and in contact with the adhesive, wherein one of the first source electrode and the first drain electrode is connected to the gate electrode of the second thin film transistor, wherein the first thin film transistor has a multi gate structure in which the first active layer has a plurality of channel regions connected in series, and wherein the plurality of pixel regions and at least a part of the driving circuit are located in a region surrounded by the epoxy resin. - View Dependent Claims (14, 15, 16, 17, 18)
-
-
19. A display device comprising:
-
a substrate; a base film over the substrate; a plurality of pixel regions over the base film, wherein each of the plurality of pixel regions comprises a first thin film transistor which has a first active layer, a first source electrode, and a first drain electrode, a second thin film transistor which has a second active layer, a second source electrode, a second drain electrode, and a gate electrode, a pixel electrode electrically connected to the second source electrode or the second drain electrode, a light emitting layer comprising an organic material formed over the pixel electrode, and a second electrode over the light emitting layer comprising the organic material; a driving circuit for driving the plurality of pixel regions, the driving circuit comprising a third thin film transistor over the substrate; and a housing material opposed to the substrate and adhered to the substrate by an adhesive, thereby forming an airtight space filled with an inert gas between the substrate and the housing material, wherein the base film is interposed between the substrate and the adhesive and in contact with the adhesive, wherein one of the first source electrode and the first drain electrode is connected to the gate electrode of the second thin film transistor, wherein the first thin film transistor has a multi gate structure in which the first active layer has a plurality of channel regions connected in series, and wherein the plurality of pixel regions and at least a part of the driving circuit are located in a region surrounded by the adhesive. - View Dependent Claims (20, 21, 22, 23, 24)
-
-
25. A display device comprising:
-
a substrate; a base film over the substrate; a plurality of pixel regions over the base film, wherein each of the plurality of pixel regions comprises a first thin film transistor which has a first active layer, a first source electrode, and a first drain electrode, a second thin film transistor which has a second active layer, a second source electrode, a second drain electrode, and a gate electrode, a pixel electrode electrically connected to the second source electrode or the second drain electrode, a light emitting layer comprising an organic material formed over the pixel electrode, and a second electrode over the light emitting layer comprising the organic material, a driving circuit for driving the plurality of pixel regions, the driving circuit comprising a third thin film transistor over the substrate; and a housing material opposed to the substrate and adhered to the substrate by an adhesive, thereby forming an airtight space filled with an inert liquid between the substrate and the housing material, wherein the base film is interposed between the substrate and the adhesive and in contact with the adhesive, wherein one of the first source electrode and the first drain electrode is connected to the gate electrode of the second thin film transistor, wherein the first thin film transistor has a multi gate structure in which the first active layer has a plurality of channel regions connected in series, and wherein the plurality of pixel regions and at least a part of the driving circuit are located in a region surrounded by the adhesive. - View Dependent Claims (26, 27, 28, 29, 30)
-
-
31. A display device comprising:
-
a substrate; a base film over the substrate; a plurality of pixel regions over the base film, wherein each of the plurality of pixel regions comprises a first thin film transistor which has a first active layer, a first source electrode, and a first drain electrode, a second thin film transistor which has a second active layer, a second source electrode, a second drain electrode, and a gate electrode, a pixel electrode electrically connected to the second source electrode or the second drain electrode, a light emitting layer comprising an organic material formed over the pixel electrode, and a second electrode over the light emitting layer comprising the organic material; a driving circuit for driving the plurality of pixel regions, the driving circuit comprising a third thin film transistor over the substrate; and a housing material opposed to the substrate and adhered to the substrate by an adhesive, thereby forming an airtight space between the substrate and the housing material, wherein the base film is interposed between the substrate and the adhesive and in contact with the adhesive, wherein one of the first source electrode and the first drain electrode is connected to the gate electrode of the second thin film transistor, wherein the first thin film transistor has a multi gate structure in which the first active layer has a plurality of channel regions connected in series, wherein the plurality of pixel regions and at least a part of the driving circuit are located in a region surrounded by the adhesive, and wherein drying agent is provided in the airtight space. - View Dependent Claims (32, 33, 34, 35, 36)
-
-
37. A display device comprising:
-
a substrate; a base film over the substrate; a plurality of pixel regions over the base film, wherein each of the plurality of pixel regions comprises a first thin film transistor which has a first active layer, a first source electrode, and a first drain electrode, a second thin film transistor which has a second active layer, a second source electrode, a second drain electrode, and a gate electrode, an interlayer insulating film over the first thin film transistor and the second thin film transistor, a pixel electrode over the interlayer insulating film electrically connected to the second source electrode or the second drain electrode, a light emitting layer comprising an organic material formed over the pixel electrode, and a second electrode over the light emitting layer comprising the organic material; a driving circuit for driving the plurality of pixel regions, the driving circuit comprising a third thin film transistor over the substrate; and a housing material opposed to the substrate and adhered to the substrate by an adhesive, thereby forming an airtight space between the substrate and the housing material, wherein the base film is interposed between the substrate and the adhesive and in contact with the adhesive, wherein one of the first source electrode and the first drain electrode is connected to the gate electrode of the second thin film transistor, wherein the first thin film transistor has a multi gate structure in which the first active layer has a plurality of channel regions connected in series, and wherein the plurality of pixel regions and at least a part of the driving circuit are located in a region surrounded by the adhesive. - View Dependent Claims (38, 39, 40, 41, 42)
-
Specification
-
- Resources
Litigation Campaign Assessment
Thank you for your request. You will receive a custom alert email when the Litigation Campaign Assessment is available.
×
-
Current AssigneeSemiconductor Energy Laboratory Co., Ltd.
-
Original AssigneeSemiconductor Energy Laboratory Co., Ltd.
-
InventorsKonuma, Toshimitsu, Yamamoto, Kunitaka, Koyama, Jun, Yamazaki, Shunpei
-
Primary Examiner(s)Roy; Sikha
-
Application NumberUS11/074,687Publication NumberTime in Patent Office1,868 DaysField of SearchNoneUS Class Current313/506CPC Class CodesH01L 27/1218 with a particular compositi...H01L 27/1255 integrated with passive dev...H01L 29/42384 for thin film field effect ...H01L 29/78621 with LDD structure or an ex...H01L 29/78627 with a significant overlap ...H01L 29/78645 with multiple gateH01L 29/78696 characterised by the struct...H01L 2924/00 Indexing scheme for arrange...H01L 2924/0002 Not covered by any one of g...H01L 33/08 with a plurality of light e...H10K 2102/3026 Top emissionH10K 50/84 Passivation; Containers; En...H10K 50/841 Self-supporting sealing arr...H10K 50/8426 Peripheral sealing arrangem...H10K 50/846 comprising getter material ...H10K 50/87 Arrangements for heating or...H10K 59/12 Active-matrix OLED [AMOLED]...H10K 59/1213 the pixel elements being TFTsH10K 59/123 Connection of the pixel ele...H10K 59/38 comprising colour filters o...
