Display system and electrical appliance

• US 9,368,089 B2
• Filed: 07/16/2015
• Issued: 06/14/2016
• Est. Priority Date: 01/17/2000
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Yamazaki, Shunpei, Koyama, Jun, Ishimaru, Noriko
• Primary Examiner(s): Faragalla, Michael
• Application Number:
  US14/801,045
• Publication Number:
  US 20150325173A1
• Time in Patent Office: 334 Days
• US Class Current: 1/1
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 2300/0809 Several active elements per pixel in active matrix panels
• CPC Class Codes: G09G 2300/0842 forming a memory circuit, e.g. a dynamic memory with one capacitor
• CPC Class Codes: G09G 2320/029 by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel
• CPC Class Codes: G09G 2320/043 Preventing or counteracting the effects of ageing
• CPC Class Codes: G09G 2320/0626 for control of overall brightness
• CPC Class Codes: G09G 2320/064 by time modulation of the brightness of the illumination source
• CPC Class Codes: G09G 2320/0646 Modulation of illumination source brightness and image signal correlated to each other
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 2330/028 Generation of voltages supplied to electrode drivers in a matrix display other than LCD
• CPC Class Codes: G09G 2354/00 Aspects of interface with display user
• 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 2360/144 the light being ambient light
• CPC Class Codes: G09G 2360/145 the light originating from the display screen
• CPC Class Codes: G09G 3/2022 using sub-frames
• CPC Class Codes: G09G 3/30 using electroluminescent panels
• CPC Class Codes: G09G 3/3233 with pixel circuitry controlling the current through the light-emitting element
• CPC Class Codes: G09G 5/10 Intensity circuits

Abstract

A display system in which the luminance of light-emitting elements in a light-emitting device is adjusted based on information on an environment. A sensor obtains information on an environment as an electrical signal. A CPU converts, based on comparison data set in advance, the information signal into a correction signal for correcting the luminance of EL elements. Upon receiving this correction signal, a voltage changer applies a predetermined corrected potential to the EL elements. Thus, this display system enables control of the luminance of the EL elements.

Claims

1. An electrical appliance comprising:

a light-emitting device, the light-emitting device comprising;

a first insulating film;

a transistor over the first insulating film;

a second insulating film over the transistor;

an EL element over the second insulating film, the EL element comprising;

a first electrode over the second insulating film;

an EL layer over the first electrode; and

a second electrode over the EL layer; and

a sensor obtaining an environment information signal,

wherein the environment information signal is converted into a correction signal on the basis of a comparison data, and

wherein a luminance of the EL element is corrected by using the correction signal.

2. The electrical appliance according to claim 1, wherein the environment information signal is any one of lightness, temperature, and humidity.

3. The electrical appliance according to claim 1, wherein a CPU converts the environment information signal into the correction signal on the basis of the comparison data.

4. The electrical appliance according to claim 1, wherein the second insulating film comprises any one of polyimide, polyamide, and an acrylic resin.

5. An electrical appliance comprising:

a light-emitting device, the light-emitting device comprising;

a first insulating film;

a transistor over the first insulating film;

a second insulating film over the transistor;

an EL element over the second insulating film, the EL element comprising;

a first electrode over the second insulating film;

an EL layer over the first electrode; and

a second electrode over the EL layer; and

a sensor obtaining an environment information signal,

wherein the environment information signal is converted into a correction signal on the basis of a comparison data, and

wherein a predetermined corrected potential according to the correction signal is applied to the EL element.

6. The electrical appliance according to claim 5, wherein the environment information signal is any one of lightness, temperature, and humidity.

7. The electrical appliance according to claim 5, wherein a CPU converts the environment information signal into the correction signal on the basis of the comparison data.

8. The electrical appliance according to claim 5, wherein the second insulating film comprises any one of polyimide, polyamide, and an acrylic resin.

9. An electrical appliance comprising:

a light-emitting device, the light-emitting device comprising;

a first insulating film;

a transistor over the first insulating film;

a second insulating film over the transistor, the second insulating film comprising an opening;

an EL element over the second insulating film, the EL element comprising;

a first electrode over the second insulating film;

an EL layer over the first electrode; and

a second electrode over the EL layer; and

a sensor obtaining an environment information signal,

wherein the first electrode is electrically connected to the transistor through the opening,

wherein the opening is filled by a protective portion,

wherein the environment information signal is converted into a correction signal on the basis of a comparison data, and

wherein a luminance of the EL element is corrected by using the correction signal.

10. The electrical appliance according to claim 9, wherein the environment information signal is any one of lightness, temperature, and humidity.

11. The electrical appliance according to claim 9, wherein a CPU converts the environment information signal into the correction signal on the basis of the comparison data.

12. The electrical appliance according to claim 9, wherein the second insulating film comprises any one of polyimide, polyamide, and an acrylic resin.

13. The electrical appliance according to claim 9, wherein the protective portion comprises any one of polyimide, polyamide, and an acrylic resin.

14. An electrical appliance comprising:

a light-emitting device, the light-emitting device comprising;

a first insulating film;

a transistor over the first insulating film;

a second insulating film over the transistor, the second insulating film comprising an opening;

an EL element over the second insulating film, the EL element comprising;

a first electrode over the second insulating film;

an EL layer over the first electrode; and

a second electrode over the EL layer; and

a sensor obtaining an environment information signal,

wherein the first electrode is electrically connected to the transistor through the opening,

wherein the opening is filled by a protective portion,

wherein the environment information signal is converted into a correction signal on the basis of a comparison data, and

wherein a predetermined corrected potential according to the correction signal is applied to the EL element.

15. The electrical appliance according to claim 14, wherein the environment information signal is any one of lightness, temperature, and humidity.

16. The electrical appliance according to claim 14, wherein a CPU converts the environment information signal into the correction signal on the basis of the comparison data.

17. The electrical appliance according to claim 14, wherein the second insulating film comprises any one of polyimide, polyamide, and an acrylic resin.

18. The electrical appliance according to claim 14, wherein the protective portion comprises any one of polyimide, polyamide, and an acrylic resin.