Display device and electronic device

• US 9,793,444 B2
• Filed: 03/15/2013
• Issued: 10/17/2017
• Est. Priority Date: 04/06/2012
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Yamazaki, Shunpei, Hirakata, Yoshiharu
• Primary Examiner(s): Vu, David
• Assistant Examiner(s): Inoussa, Mouloucoulaye
• Application Number:
  US13/833,730
• Publication Number:
  US 20130264549A1
• Time in Patent Office: 1,677 Days
• Field of Search: 257 40, 257 91, 257 89, 257E33072, 257 59, 257 72, 257 98, 349 98, 349 62
• CPC Class Codes: B82Y 20/00 Nanooptics, e.g. quantum optics or photonic crystals
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 2320/0271 Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
• CPC Class Codes: G09G 2340/0435 Change or adaptation of the frame rate of the video stream
• CPC Class Codes: G09G 2360/144 the light being ambient light
• CPC Class Codes: G09G 3/003 to produce spatial visual effects
• CPC Class Codes: G09G 3/2003 Display of colours specific for liquid crystal displays G09G3/3607
• CPC Class Codes: H01L 33/50 Wavelength conversion elements
• CPC Class Codes: H10K 50/80 Constructional details
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays

Abstract

One object of the invention is to provide a display device that can display an image which causes a viewer less strain associated with viewing and gives a viewer a sense of great depth and an electronic device for enjoying the image. The present inventors have focused on a sense of depth obtained by monocular viewing and have conceived a display device in which pixels each include a light-emitting module capable of emitting light having a spectral line half-width of less than or equal to 60 nm in a response time of less than or equal to 100 μs and are provided at a resolution of higher than or equal to 80 ppi; the NTSC ratio is higher than or equal to 80%; and the contrast ratio is higher than or equal to 500.

Claims

1. A display device comprising:

pixels each including a light-emitting module capable of emitting light having a spectral line half-width of less than or equal to 60 nm, the pixels being provided at a resolution of higher than or equal to 80 ppi; and

an image processing device transmitted an image signal, the image processing device comprising;

a noise removing portion configured to remove noise from the image signal;

a pixel-to-pixel complementary portion configured to complement data to the image signal when the resolution is up-converted;

a tone correction portion configured to correct color tone of the image signal; and

a complementary frame generating portion configured to generate an image of an frame when increasing frame frequency,

wherein the display device has a NTSC ratio of higher than or equal to 80% and a contrast ratio of higher than or equal to 500.

2. The display device according to claim 1, comprising:

a first light-emitting module including a first color filter for transmitting light exhibiting blue color, a reflective film, and a semi-transmissive and semi-reflective film;

a second light-emitting module including a second color filter for transmitting light exhibiting green color, the reflective film, and the semi-transmissive and semi-reflective film; and

a third light-emitting module including a third color filter for transmitting light exhibiting red color, the reflective film, and the semi-transmissive and semi-reflective film,

wherein a first optical path length between the reflective film and the semi-transmissive and semi-reflective film is adjusted to i/2 (i is a natural number) a length greater than or equal to 400 nm and less than 500 nm in the first light-emitting module,

wherein a second optical path length between the reflective film and the semi-transmissive and semi-reflective film is adjusted to j/2 (j is a natural number) a length greater than or equal to 500 nm and less than 600 nm in the second light-emitting module, and

wherein a third optical path length between the reflective film and the semi-transmissive and semi-reflective film is adjusted to k/2 (k is a natural number) a length greater than or equal to 600 nm and less than 800 nm in the third light-emitting module.

3. The display device according to claim 1, comprising:

a first light-emitting module configured to emit light that exhibits red color and has a first spectral line half-width of less than 50 nm;

a second light-emitting module configured to emit light that exhibits green color and has a second spectral line half-width narrower than the first spectral line half-width; and

a third light-emitting module configured to emit light that exhibits blue color and has a third spectral line half-width narrower than the second spectral line half-width.

4. The display device according to claim 1, comprising:

a first light-emitting module including a first color filter for transmitting light exhibiting blue color, a reflective film, and a semi-transmissive and semi-reflective film;

a second light-emitting module including a second color filter for transmitting light exhibiting green color, the reflective film, and the semi-transmissive and semi-reflective film; and

a third light-emitting module including a third color filter for transmitting light exhibiting red color, the reflective film, and the semi-transmissive and semi-reflective film,

wherein a first optical path length between the reflective film and the semi-transmissive and semi-reflective film is adjusted to i/2 (i is a natural number) a length greater than or equal to 400 nm and less than 500 nm in the first light-emitting module,

wherein a second optical path length between the reflective film and the semi-transmissive and semi-reflective film is adjusted to j/2 (j is a natural number) a length greater than or equal to 500 nm and less than 600 nm in the second light-emitting module,

wherein a third optical path length between the reflective film and the semi-transmissive and semi-reflective film is adjusted to k/2 (k is a natural number) a length greater than or equal to 600 nm and less than 800 nm in the third light-emitting module, and

wherein the first light-emitting module, the second light-emitting module, and the third light-emitting module include a same layer containing a light-emitting organic compound.

5. An electronic device comprising the display device according to claim 1.

11. The display device according to claim 1,

wherein the light-emitting module is capable of emitting light in a response time of less than or equal to 100 μ

s.

12. The display device according to claim 1,

wherein each of the pixels includes a transistor having an oxide semiconductor for a region where a channel of the transistor is formed.

6. A display device comprising:

pixels each including a light-emitting module capable of emitting light having a spectral line half-width of less than or equal to 60 nm, the pixels being provided at a resolution of higher than or equal to 80 ppi; and

an image processing device transmitted an image signal, the image processing device comprising;

a noise removing portion configured to remove noise from the image signal;

a pixel-to-pixel complementary portion configured to complement data to the image signal when the resolution is up-converted;

a tone correction portion configured to correct color tone of the image signal; and

a complementary frame generating portion configured to generate an image of an frame when increasing frame frequency,

wherein the light-emitting module comprises;

a light-emitting element comprising;

a reflective film and a semi-transmissive and semi-reflective film,

a plurality of layers containing a light-emitting organic compound between the reflective film and the semi-transmissive and semi-reflective film, and

an interlayer between the plurality of layers containing the light-emitting organic compound, and

a color filter on the semi-transmissive and semi-reflective film side, the color filter overlapping with the light-emitting element, and

wherein the display device has a NTSC ratio of higher than or equal to 80% and a contrast ratio of higher than or equal to 500.

7. The display device according to claim 6, comprising:

a first light-emitting module including a first color filter for transmitting light exhibiting blue color, the reflective film, and the semi-transmissive and semi-reflective film;

a second light-emitting module including a second color filter for transmitting light exhibiting green color, the reflective film, and the semi-transmissive and semi-reflective film; and

a third light-emitting module including a third color filter for transmitting light exhibiting red color, the reflective film, and the semi-transmissive and semi-reflective film,

wherein a first optical path length between the reflective film and the semi-transmissive and semi-reflective film is adjusted to i/2 (i is a natural number) a length greater than or equal to 400 nm and less than 500 nm in the first light-emitting module,

wherein a second optical path length between the reflective film and the semi-transmissive and semi-reflective film is adjusted to j/2 (I is a natural number) a length greater than or equal to 500 nm and less than 600 nm in the second light-emitting module, and

wherein a third optical path length between the reflective film and the semi-transmissive and semi-reflective film is adjusted to k/2 (k is a natural number) a length greater than or equal to 600 nm and less than 800 nm in the third light-emitting module.

8. The display device according to claim 6, comprising:

a first light-emitting module configured to emit light that exhibits red color and has a first spectral line half-width of less than 50 nm;

a second light-emitting module configured to emit light that exhibits green color and has a second spectral line half-width narrower than the first spectral line half-width; and

a third light-emitting module configured to emit light that exhibits blue color and has a third spectral line half-width narrower than the second spectral line half-width.

9. The display device according to claim 6, comprising:

a first light-emitting module including a first color filter for transmitting light exhibiting blue color, the reflective film, and the semi-transmissive and semi-reflective film;

a second light-emitting module including a second color filter for transmitting light exhibiting green color, the reflective film, and the semi-transmissive and semi-reflective film; and

a third light-emitting module including a third color filter for transmitting light exhibiting red color, the reflective film, and the semi-transmissive and semi-reflective film,

wherein a first optical path length between the reflective film and the semi-transmissive and semi-reflective film is adjusted to i/2 (i is a natural number) a length greater than or equal to 400 nm and less than 500 nm in the first light-emitting module,

wherein a second optical path length between the reflective film and the semi-transmissive and semi-reflective film is adjusted to j/2 (j is a natural number) a length greater than or equal to 500 nm and less than 600 nm in the second light-emitting module,

wherein a third optical path length between the reflective film and the semi-transmissive and semi-reflective film is adjusted to k/2 (k is a natural number) a length greater than or equal to 600 nm and less than 800 nm in the third light-emitting module, and

wherein the first light-emitting module, the second light-emitting module, and the third light-emitting module include a same layer containing the light-emitting organic compound.

10. An electronic device comprising the display device according to claim 6.

13. The display device according to claim 6,

wherein the light-emitting module is capable of emitting light in a response time of less than or equal to 100 μ

s.

14. The display device according to claim 6,

wherein the each of the pixels includes a transistor having an oxide semiconductor for a region where a channel of the transistor is formed.

15. A display device comprising:

pixels including a first light-emitting module and a second light-emitting module each capable of emitting light having a spectral line half-width of less than or equal to 60 nm in a response time of less than or equal to 100 μ

s, the pixels being provided at a resolution of higher than or equal to 80 ppi,

wherein the display device has a NTSC ratio of higher than or equal to 80% and a contrast ratio of higher than or equal to 500,

wherein the first light-emitting module comprises a first electrode and a second electrode and a layer containing a light-emitting organic compound between the first electrode and the second electrode, and

wherein the second light-emitting module comprises a third electrode and the second electrode and the layer containing the light-emitting organic compound between the third electrode and the second electrode.

16. The display device according to claim 15, comprising:

the first light-emitting module including a first color filter for transmitting light exhibiting blue color, a first reflective film as the first electrode, and a semi-transmissive and semi-reflective film as the second electrode;

the second light-emitting module including a second color filter for transmitting light exhibiting green color, a second reflective film as the third electrode, and the semi-transmissive and semi-reflective film; and

a third light-emitting module including a third color filter for transmitting light exhibiting red color, a third reflective film, and the semi-transmissive and semi-reflective film,

wherein a first optical path length between the first reflective film and the semi-transmissive and semi-reflective film is adjusted to i/2 (i is a natural number) a length greater than or equal to 400 nm and less than 500 nm in the first light-emitting module,

wherein a second optical path length between the second reflective film and the semi-transmissive and semi-reflective film is adjusted to j/2 (j is a natural number) a length greater than or equal to 500 nm and less than 600 nm in the second light-emitting module, and

wherein a third optical path length between the third reflective film and the semi-transmissive and semi-reflective film is adjusted to k/2(k is a natural number) a length greater than or equal to 600 nm and less than 800 nm in the third light-emitting module.

17. The display device according to claim 15, comprising:

the first light-emitting module configured to emit light that exhibits red color and has a first spectral line half-width of less than 50 nm;

the second light-emitting module configured to emit light that exhibits green color and has a second spectral line half-width narrower than the first spectral line half-width; and

a third light-emitting module configured to emit light that exhibits blue color and has a third spectral line half-width narrower than the second spectral line half-width.

18. The display device according to claim 15, comprising:

the first light-emitting module including a first color filter for transmitting light exhibiting blue color, a first reflective film as the first electrode, and a semi-transmissive and semi-reflective film as the second electrode;

the second light-emitting module including a second color filter for transmitting light exhibiting green color, a second reflective film, and the semi-transmissive and semi-reflective film; and

a third light-emitting module including a third color filter for transmitting light exhibiting red color, a third reflective film, and the semi-transmissive and semi-reflective film,

wherein a first optical path length between the first reflective film and the semi-transmissive and semi-reflective film is adjusted to i/2 (i is a natural number) a length greater than or equal to 400 nm and less than 500 nm in the first light-emitting module,

wherein a second optical path length between the second reflective film and the semi-transmissive and semi-reflective film is adjusted to j/2 (j is a natural number) a length greater than or equal to 500 nm and less than 600 nm in the second light-emitting module,

wherein a third optical path length between the third reflective film and the semi-transmissive and semi-reflective film is adjusted to k/2 (k is a natural number) a length greater than or equal to 600 nm and less than 800 nm in the third light-emitting module, and

wherein the first light-emitting module, the second light-emitting module, and the third light-emitting module include a same layer containing a light-emitting organic compound.

19. An electronic device comprising the display device according to claim 15.

20. The display device according to claim 15,

wherein each of the pixels includes a transistor having an oxide semiconductor for a region where a channel of the transistor is formed.

21. A display device comprising:

pixels each including a light-emitting module capable of emitting light having a spectral line half-width of less than or equal to 60 nm in a response time of less than or equal to 100 μ

s, the pixels being provided at a resolution of higher than or equal to 80 ppi;

wherein the light-emitting module comprises;

a light-emitting element comprising;

a reflective film and a semi-transmissive and semi-reflective film,

a plurality of layers containing a light-emitting organic compound between the reflective film and the semi-transmissive and semi-reflective film, and

an interlayer between the plurality of layers containing the light-emitting organic compound, and

a color filter on the semi-transmissive and semi-reflective film side, the color filter overlapping with the light-emitting element, and

wherein the display device has a NTSC ratio of higher than or equal to 80% and a contrast ratio of higher than or equal to 500.

22. The display device according to claim 21, comprising:

a first light-emitting module including a first color filter for transmitting light exhibiting blue color, the reflective film, and the semi-transmissive and semi-reflective film;

a second light-emitting module including a second color filter for transmitting light exhibiting green color, the reflective film, and the semi-transmissive and semi-reflective film; and

a third light-emitting module including a third color filter for transmitting light exhibiting red color, the reflective film, and the semi-transmissive and semi-reflective film,

wherein a first optical path length between the reflective film and the semi-transmissive and semi-reflective film is adjusted to i/2 (i is a natural number) a length greater than or equal to 400 nm and less than 500 nm in the first light-emitting module,

wherein a second optical path length between the reflective film and the semi-transmissive and semi-reflective film is adjusted to j/2 (j is a natural number) a length greater than or equal to 500 nm and less than 600 nm in the second light-emitting module, and

wherein a third optical path length between the reflective film and the semi-transmissive and semi-reflective film is adjusted to k/2(k is a natural number) a length greater than or equal to 600 nm and less than 800 nm in the third light-emitting module.

23. The display device according to claim 21, comprising:

a first light-emitting module configured to emit light that exhibits red color and has a first spectral line half-width of less than 50 nm;

a second light-emitting module configured to emit light that exhibits green color and has a second spectral line half-width narrower than the first spectral line half-width; and

a third light-emitting module configured to emit light that exhibits blue color and has a third spectral line half-width narrower than the second spectral line half-width.

24. The display device according to claim 21, comprising:

a first light-emitting module including a first color filter for transmitting light exhibiting blue color, the reflective film, and the semi-transmissive and semi-reflective film;

a second light-emitting module including a second color filter for transmitting light exhibiting green color, the reflective film, and the semi-transmissive and semi-reflective film; and

a third light-emitting module including a third color filter for transmitting light exhibiting red color, the reflective film, and the semi-transmissive and semi-reflective film,

wherein a first optical path length between the reflective film and the semi-transmissive and semi-reflective film is adjusted to i/2 (i is a natural number) a length greater than or equal to 400 nm and less than 500 nm in the first light-emitting module,

wherein a second optical path length between the reflective film and the semi-transmissive and semi-reflective film is adjusted to j/2(j is a natural number) a length greater than or equal to 500 nm and less than 600 nm in the second light-emitting module,

wherein a third optical path length between the reflective film and the semi-transmissive and semi-reflective film is adjusted to k/2(k is a natural number) a length greater than or equal to 600 nm and less than 800 nm in the third light-emitting module, and

wherein the first light-emitting module, the second light-emitting module, and the third light- emitting module include a same layer containing the light-emitting organic compound.

25. An electronic device comprising the display device according to claim 21.

26. The display device according to claim 21,

wherein each of the pixels includes a transistor having an oxide semiconductor for a region where a channel of the transistor is formed.