Display Device and Electronic Device

• US 20130264549A1
• Filed: 03/15/2013
• Published: 10/10/2013
• 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
• Granted Patent: US 9,793,444 B2
• Time in Patent Office: Days
• US Class Current: 257/40
• 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 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.

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.

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 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.

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 (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.

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.