Electro-optical device and electronic apparatus with a pixel that transmits light with peak transmittances in the wavelength ranges or red, green, and blue

Patent metadata

Field	Value
Publication number	US-9684212-B2
Application number	US-201514732442-A
Country	US
Kind code	B2
Filing date	Jun 5, 2015
Priority date	Jul 22, 2011
Publication date	Jun 20, 2017
Grant date	Jun 20, 2017

Abstract

A liquid crystal device comprises a first substrate, a second substrate, an insulating film, and a first, second, and third translucent electrode. The second substrate is disposed facing the first substrate. The first translucent electrode is disposed between the second substrate and the first substrate. The second translucent electrode is disposed between the first translucent electrode and the first substrate. The insulating film is disposed between the second translucent electrode and the first substrate. The third translucent electrode is disposed between the insulating film and the first substrate.

First claim

What is claimed is:

1. A liquid crystal device comprising:
a first substrate;
a second substrate disposed facing the first substrate;
a first translucent electrode disposed between the second substrate and the first substrate;
a second translucent electrode disposed between the first translucent electrode and the first substrate;
an insulating film disposed between the second translucent electrode and the first substrate; and
a third translucent electrode disposed between the insulating film and the first substrate.

2. The liquid crystal device according to claim 1 , further comprising:
a dielectric layer disposed between the first translucent electrode and the second translucent electrode,
wherein
the insulating film is disposed between the second translucent electrode and the third translucent electrode,
a distance between the first translucent electrode and the second translucent electrode, which is equal to a thickness of the dielectric layer disposed between the first translucent electrode and the second translucent electrode, is smaller than a thickness of the first translucent electrode, a thickness of the second translucent electrode, and a thickness of the third translucent electrode, and
a distance between the second translucent electrode and the third translucent electrode, which is equal to a thickness of the insulating film disposed between the second translucent electrode and the third translucent electrode, is larger than the thickness of the first translucent electrode, the thickness of the second translucent electrode, and the thickness of the third translucent electrode.

3. The liquid crystal device according to claim 2 , wherein
the first translucent electrode is composed of ITO,
the second translucent electrode is composed of ITO,
the third translucent electrode is composed of ITO,
the thickness of the first translucent electrode is in a range of 140 nm ±10%,
the thickness of the second translucent electrode is in a range of 140 nm ±5%, and
the thickness of the third translucent electrode is in a range of 140 nm ±5%.

4. An electronic apparatus comprising the liquid crystal device according to claim 3 .

5. An electronic apparatus comprising the liquid crystal device according to claim 2 .

6. The liquid crystal device according to claim 1 , further comprising:
a pixel having an aperture,
wherein a spectral distribution of intensity versus wavelength of a light transmitting through the aperture of the pixel has a first peak intensity in a red wavelength range, a second peak intensity in a green wavelength range, and a third peak intensity in a blue wavelength range.

7. The liquid crystal device according to claim 6 , wherein
the red wavelength range is 600 to 700 nm,
the green wavelength range is 500 to 600 nm, and
the blue wavelength range is 400 to 500 nm.

8. An electronic apparatus comprising the liquid crystal device according to claim 7 .

9. The electronic apparatus according to claim 8 , further comprising:
a light source that illuminates the electro optical device,
wherein a spectral distribution of intensity versus wavelength of a light emitted from the light source has a fourth peak intensity in a red wavelength range, a fifth peak intensity in a green wavelength range, and a sixth peak intensity in a blue wavelength range,
a peak wavelength of the fourth peak intensity substantially matches a peak wavelength of the first peak intensity,
a peak wavelength of the fifth peak intensity substantially matches a peak wavelength of the second peak intensity, and
a peak wavelength of the sixth peak intensity substantially matches a peak wavelength of the third peak intensity.

10. The liquid crystal device according to claim 6 , wherein thicknesses of the first translucent electrode, the second translucent electrode, and the third translucent electrode are set so that the intensity of the light transmitting through the aperture of the pixel has the first peak in the red wavelength range, the second peak in the green wavelength range, and the third peak in the blue wavelength range.

11. An electronic apparatus comprising the liquid crystal device according to claim 10 .

12. The electronic apparatus according to claim 11 , further comprising:
a light source that illuminates the electro optical device,
wherein a spectral distribution of intensity versus wavelength of a light emitted from the light source has a fourth peak intensity in a red wavelength range, a fifth peak intensity in a green wavelength range, and a sixth peak intensity in a blue wavelength range,
a peak wavelength of the fourth peak intensity substantially matches a peak wavelength of the first peak intensity,
a peak wavelength of the fifth peak intensity substantially matches a peak wavelength of the second peak intensity, and
a peak wavelength of the sixth peak intensity substantially matches a peak wavelength of the third peak intensity.

13. An electronic apparatus comprising the liquid crystal device according to claim 6 .

14. The electronic apparatus according to claim 13 , further comprising:
a light source that illuminates the electro optical device,
wherein a spectral distribution of intensity versus wavelength of a light emitted from the light source has a fourth peak intensity in a red wavelength range, a fifth peak intensity in a green wavelength range, and a sixth peak intensity in a blue wavelength range,
a peak wavelength of the fourth peak intensity substantially matches a peak wavelength of the first peak intensity,
a peak wavelength of the fifth peak intensity substantially matches a peak wavelength of the second peak intensity, and
a peak wavelength of the sixth peak intensity substantially matches a peak wavelength of the third peak intensity.

15. An electronic apparatus comprising the liquid crystal device according to claim 1 .

Assignees

• Seiko Epson Corp

Inventors

• Tateno Yoshitake
• Ito Satoshi

Classifications

• G02F1/133345

  Insulating layers (G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence) · CPC title

• G02F2201/40

  Arrangements for improving the aperture ratio · CPC title

• G02F2001/136222

  Physics · mapped topic

• G02F1/136213 Primary

  Storage capacitors associated with the pixel electrode · CPC title

• G02F1/13439 Primary

  characterised by their electrical, optical, physical properties; materials therefor; method of making · CPC title