Display device and electronic device

• US 9,411,165 B2
• Filed: 05/02/2013
• Issued: 08/09/2016
• Est. Priority Date: 05/09/2012
• 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): Donovan, Lincoln
• Assistant Examiner(s): Skibinski, Thomas
• Application Number:
  US13/875,606
• Publication Number:
  US 20130300313A1
• Time in Patent Office: 1,195 Days
• Field of Search: 315/291, 315/294, 315/297, 313/504, 345/531, 345/100, 345/204, 257/98, 349/117, 349/15, 349/96
• US Class Current: 1/1
• CPC Class Codes: G02B 30/00 Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images in microscopes G02B21/22
• CPC Class Codes: G02B 30/27 involving lenticular arrays
• CPC Class Codes: G09G 2300/0452 Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
• CPC Class Codes: G09G 2320/066 for control of contrast
• CPC Class Codes: G09G 3/2074 using sub-pixels
• CPC Class Codes: G09G 3/3275 Details of drivers for data electrodes
• CPC Class Codes: H10K 59/35 comprising red-green-blue [RGB] subpixels
• CPC Class Codes: H10K 59/38 comprising colour filters or colour changing media [CCM]

Abstract

A display device has an NTSC ratio of higher than or equal to 80% and a contrast ratio of higher than or equal to 500 and includes a display portion. In the display portion, pixels are provided at a resolution of greater than or equal to 80 ppi, and the pixels each includes a light-emitting module capable of emitting light with a spectral line half-width of less than or equal to 60 nm in a response time of shorter than or equal to 100 μs. Further, transient characteristics of the emission intensity of the light-emitting module have a projecting portion higher than other portions in a portion rising in response to an input signal.

Claims

1. A display device comprising:

a display portion in which pixels are provided at a resolution of greater than or equal to 80 ppi, the pixels each comprising a light-emitting module capable of emitting light with a spectral line half-width of less than or equal to 60 nm in a response time of shorter than or equal to 100 μ

s,

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

wherein a transient characteristic of emission intensity of the light-emitting module has a projecting portion in a portion rising in response to an input signal, the projecting portion having a higher emission intensity than other portions of the transient characteristic.

2. The display device according to claim 1,

wherein the light-emitting module comprises:

a reflective film;

a semi-transmissive and semi-reflective film; and

a light-emitting element between the reflective film and the semi-transmissive and semi-reflective film, the light-emitting element comprising;

a pair of electrodes; and

a layer comprising a light-emitting organic compound between the pair of electrodes.

3. The display device according to claim 1,

wherein the light-emitting module comprises:

a reflective film;

a semi-transmissive and semi-reflective film;

a light-emitting element between the reflective film and the semi-transmissive and semi-reflective film, the light-emitting element comprising;

a pair of electrodes;

a plurality of layers each comprising a light-emitting organic compound between the pair of electrodes; and

an interlayer between one of the plurality of layers and another of the plurality of layers; and

a color filter overlapping with the light-emitting element with the semi-transmissive and semi-reflective film provided therebetween.

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

a first light-emitting module comprising;

a color filter transmitting red light; and

the reflective film and the semi-transmissive and semi-reflective film between which an optical path length is adjusted to i/2 times (i is a natural number) a length greater than or equal to 600 nm and less than 800 nm;

a second light-emitting module comprising;

a color filter transmitting green light; and

the reflective film and the semi-transmissive and semi-reflective film between which an optical path length is adjusted to j/2 times (j is a natural number) a length greater than or equal to 500 nm and less than 600 nm; and

a third light-emitting module comprising;

a color filter transmitting blue light; and

the reflective film and the semi-transmissive and semi-reflective film between which an optical path length is adjusted to k/2 times (k is a natural number) a length greater than or equal to 400 nm and less than 500 nm.

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

a first light-emitting module comprising;

a color filter transmitting red light; and

the reflective film and the semi-transmissive and semi-reflective film between which an optical path length is adjusted to i/2 times (i is a natural number) a length greater than or equal to 600 nm and less than 800 nm;

a second light-emitting module comprising;

a color filter transmitting green light; and

the reflective film and the semi-transmissive and semi-reflective film between which an optical path length is adjusted to j/2 times (j is a natural number) a length greater than or equal to 500 nm and less than 600 nm; and

a third light-emitting module comprising;

a color filter transmitting blue light; and

the reflective film and the semi-transmissive and semi-reflective film between which an optical path length is adjusted to k/2 times (k is a natural number) a length greater than or equal to 400 nm and less than 500 nm,

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

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

a first light-emitting module configured to emit red light with a spectral line half-width of less than 50 nm;

a second light-emitting module configured to emit green light with a spectral line half-width of less than the spectral line half-width of the red light; and

a third light-emitting module configured to emit blue light with a spectral line half-width of less than the spectral line half-width of the green light.

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

8. A display device comprising:

a display portion in which pixels are provided at a resolution of greater than or equal to 80 ppi, the pixels each comprising a light-emitting module capable of emitting light with a spectral line half-width of less than or equal to 60 nm in a response time of shorter than or equal to 100 μ

s; and

a correction control circuit configured to generate a signal that corrects a transient characteristic of emission intensity of the light-emitting module and to output the signal to the display portion,

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

wherein the transient characteristic of emission intensity of the light-emitting module has a projecting portion in a portion rising in response to an input signal, the projecting portion having a higher emission intensity than other portions of the transient characteristic.

9. The display device according to claim 8,

wherein the light-emitting module comprises:

a reflective film;

a semi-transmissive and semi-reflective film; and

a light-emitting element between the reflective film and the semi-transmissive and semi-reflective film, the light-emitting element comprising;

a pair of electrodes; and

a layer comprising a light-emitting organic compound between the pair of electrodes.

10. The display device according to claim 8,

wherein the light-emitting module comprises:

a reflective film;

a semi-transmissive and semi-reflective film;

a light-emitting element between the reflective film and the semi-transmissive and semi-reflective film, the light-emitting element comprising;

a pair of electrodes;

a plurality of layers each comprising a light-emitting organic compound between the pair of electrodes; and

an interlayer between one of the plurality of layers and another of the plurality of layers; and

a color filter overlapping with the light-emitting element with the semi-transmissive and semi-reflective film provided therebetween.

11. The display device according to claim 10, comprising:

a first light-emitting module comprising;

a color filter transmitting red light; and

the reflective film and the semi-transmissive and semi-reflective film between which an optical path length is adjusted to i/2 times (i is a natural number) a length greater than or equal to 600 nm and less than 800 nm;

a second light-emitting module comprising;

a color filter transmitting green light; and

the reflective film and the semi-transmissive and semi-reflective film between which an optical path length is adjusted to j/2 times (j is a natural number) a length greater than or equal to 500 nm and less than 600 nm; and

a third light-emitting module comprising;

a color filter transmitting blue light; and

the reflective film and the semi-transmissive and semi-reflective film between which an optical path length is adjusted to k/2 times (k is a natural number) a length greater than or equal to 400 nm and less than 500 nm.

12. The display device according to claim 10, comprising:

a first light-emitting module comprising;

a color filter transmitting red light; and

the reflective film and the semi-transmissive and semi-reflective film between which an optical path length is adjusted to i/2 times (i is a natural number) a length greater than or equal to 600 nm and less than 800 nm;

a second light-emitting module comprising;

a color filter transmitting green light; and

the reflective film and the semi-transmissive and semi-reflective film between which an optical path length is adjusted to j/2 times (j is a natural number) a length greater than or equal to 500 nm and less than 600 nm; and

a third light-emitting module comprising;

a color filter transmitting blue light; and

the reflective film and the semi-transmissive and semi-reflective film between which an optical path length is adjusted to k/2 times (k is a natural number) a length greater than or equal to 400 nm and less than 500 nm,

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

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

a first light-emitting module configured to emit red light with a spectral line half-width of less than 50 nm;

a second light-emitting module configured to emit green light with a spectral line half-width of less than the spectral line half-width of the red light; and

a third light-emitting module configured to emit blue light with a spectral line half-width of less than the spectral line half-width of the green light.

14. An electronic device comprising the display device according to claim 8.

15. A display device comprising:

a display portion in which pixels are provided at a resolution of greater than or equal to 80 ppi, the pixels each comprising a light-emitting module capable of emitting light with a spectral line half-width of less than or equal to 60 nm in a response time of shorter than or equal to 100 μ

s,

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

wherein a transient characteristic of emission intensity of the light-emitting module has a projecting portion and a second portion following the projecting portion, the projecting portion having a higher emission intensity than the second portion.

16. The display device according to claim 15, wherein the light emitting module comprising:

a pair of electrodes; and

a layer comprising a light-emitting organic compound between the pair of electrodes.

17. The display device according to claim 16, wherein the light-emitting organic compound is one of a fluorescent organic compound and a phosphorescent organic compound.

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