Display device mounted with read function and electric appliance

• US 7,342,256 B2
• Filed: 07/13/2005
• Issued: 03/11/2008
• Est. Priority Date: 07/16/2004
• Status: Expired due to Fees

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Yamazaki, Shunpei
• Primary Examiner(s): Pham; Long
• Application Number:
  US11/179,799
• Publication Number:
  US 20060011913A1
• Time in Patent Office: 972 Days
• Field of Search: 257/79, 257/80, 257/81, 257/83, 257/89
• US Class Current: 257/80
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06V 40/1318 using electro-optical elements or layers, e.g. electroluminescent sensing
• CPC Class Codes: G09G 2300/0443 with several sub-pixels for the same colour in a pixel, not specifically used to display gradations G09G3/364 takes precedence
• CPC Class Codes: G09G 2300/0842 forming a memory circuit, e.g. a dynamic memory with one capacitor
• CPC Class Codes: G09G 2360/14 Detecting light within display terminals, e.g. using a single or a plurality of photosensors
• CPC Class Codes: G09G 3/32 semiconductive, e.g. using light-emitting diodes [LED]
• CPC Class Codes: H01L 27/12 the substrate being other than a semiconductor body, e.g. an insulating body
• CPC Class Codes: H01L 27/1214 comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
• CPC Class Codes: H01L 27/14621 Colour filter arrangements
• CPC Class Codes: H01L 27/14645 Colour imagers
• CPC Class Codes: H01L 27/14678 Contact-type imagers
• CPC Class Codes: H10K 59/122 Pixel-defining structures or layers, e.g. banks
• CPC Class Codes: H10K 59/13 comprising photosensors that control luminance
• CPC Class Codes: H10K 59/65 OLEDs integrated with inorganic image sensors

Abstract

According to the present invention, a material having a light-shielding property is used for a bank layer surrounding the edge of a light-emitting element. Accordingly, light which is not reflected by an object to be read out can be prevented from entering an image pick-up element, and information on the object to be read out can be correctly read out. The display device mounted with a read function according to the present invention includes a thin film transistor and an image pick-up element over a substrate having an insulating surface, an insulating layer covering a thin film transistor and an image pick-up element, a light-emitting element provided over the insulating layer, and a bank layer having a light-shielding property surrounding the edge of the light-emitting element. The bank layer has an opening portion in a position overlapping with the image pick-up element.

Claims

1. A display device comprising:

a substrate having a insulating surface; and

a plurality of pixels, wherein each of the plurality of pixels comprising;

a first sub pixel having a first light-emitting element;

a second sub pixel having a second light-emitting element;

a third sub pixel having an image pick-up element;

wherein a total area of the second sub pixel and the third sub pixel is substantially equal to the area of the first sub pixel.

3. The display device according to claim 1, wherein the plurality of pixels is arranged in a striped pattern.

5. The display device according to claim 1, wherein the plurality of pixels is arranged in a deltoid pattern.

7. The display device according to claim 1, wherein the plurality of pixels is arranged in a mosaic pattern.

9. An electric appliance having the display device according to claim 1.

2. A display device comprising:

a substrate having and insulating surface; and

a plurality of pixels, wherein each of the plurality of pixels comprising;

a first sub pixel having a first light-emitting element exhibiting red emission;

a second sub pixel having a second light-emitting element exhibiting green emission;

a third sub pixel having a third light-emitting element exhibiting blue emission; and

a fourth sub pixel having and image pick-up element;

wherein an area of the first sub pixel is substantially equal to an area of the third sub pixel, and

wherein a total area of the second sub pixel and the fourth sub pixel is substantially equal to the area of the first sub pixel.

4. The display device according to claim 2, wherein the plurality of pixels is arranged in a striped pattern.

6. The display device according to claim 2, wherein the plurality of pixels is arranged in a deltoid pattern.

8. The display device according to claim 2, wherein the plurality of pixels is arranged in a mosaic pattern.

10. An electric appliance having the display device according to claim 2.

11. A display device comprising:

a substrate having an insulating surface; and

a plurality of pixels, wherein each of the plurality of pixels comprising;

a first sub pixel having a first light-emitting element;

a second sub pixel having a second light-emitting element; and

a third sub pixel having an image pick-up element;

an insulating layer; and

a light-shielding layer over the insulating layer,

wherein a total area of the second sub pixel and the third sub pixel is substantially equal to the area of the first sub pixel,

wherein the insulating layer is formed under the first light emitting element and the second light emitting element, and formed over the image pick-up element, and

wherein the light-shielding layer having openings over the light emitting element and over the image pick-up element.

12. The display device according to claim 11, wherein the plurality of pixels is arranged in striped pattern.

13. The display device according to claim 11, wherein the plurality of pixels is arranged in a deltoid pattern.

14. The display device according to claim 11, wherein the plurality of pixels is arranged in mosaic pattern.

15. An electric appliance having the display device according to claim 11.

16. A display device comprising:

a substrate having an insulating surface; and

a plurality of pixels, wherein each of the plurality of pixels comprising;

a first sub pixel having a first light-emitting element and a first coloring layer over the first light emitting element;

a second sub pixel having a second light-emitting element and a second coloring layer over the second light emitting element; and

a third sub pixel having and image pick-up element;

an insulating layer; and

a light-shielding layer over the insulating layer,

wherein a total area of the second sub pixel and the third sub pixel is substantially equal to the area of the first sub pixel,

wherein the insulating layer is formed under the first light emitting element and the second light emitting element, and formed over the image pick-up element, and

wherein the light-shielding layer having openings over the light emitting element and over the image pick-up element.

17. The display device according to claim 16, wherein the plurality of pixels is arranged in a striped pattern.

18. The display device according to claim 16, wherein the plurality of pixels is arranged in a deltoid pattern.

19. The display device according to claim 16, wherein the plurality of pixels is arranged in a mosaic pattern.

20. An electric appliance having the display device according to claim 16.