Contrast-adjustable panels and displays via organic light-emitting devices

• US 6,930,658 B2
• Filed: 05/09/2003
• Issued: 08/16/2005
• Est. Priority Date: 05/10/2002
• Status: Active Grant

• Current Assignee: III Holdings 1, LLC
• Original Assignee: RITDISPLAY CORPORATION
• Inventors: Lee, Jiun-Haw, Liao, Chi-Chih, Hu, Peir-Jy
• Primary Examiner(s): Vo, Tuyet Thi
• Application Number:
  US10/434,270
• Publication Number:
  US 20030214240A1
• Time in Patent Office: 830 Days
• Field of Search: 345/76, 345/77, 345/63, 345/82, 345/83, 315/169.3, 315/193.4, 315/169.1, 315/169.4, 313/503, 313/504, 313/506, 313/507
• US Class Current: 345/77
• CPC Class Codes: G09G 2320/0626 for control of overall brightness
• CPC Class Codes: G09G 2360/144 the light being ambient light
• CPC Class Codes: G09G 3/3208 organic, e.g. using organic light-emitting diodes [OLED]
• CPC Class Codes: H10K 59/13 comprising photosensors that control luminance
• CPC Class Codes: H10K 65/00 Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element and at least one organic radiation-sensitive element, e.g. organic opto-couplers organic image sensors integrated with organic light-emitting devices H10K39/34; OLED displays integrated with photosensors H10K59/13

Abstract

A contrast-adjustable display via an organic light-emitting device includes a transparent substrate, a light-detectable unit, a current-detectable unit, an organic light-emitting unit, a driving unit and a controlling unit. The light-detectable unit for detecting an external light intensity is formed on the transparent substrate, and then generates a current intensity based on the external light intensity. The current-detectable unit for detecting the current intensity is connected to the light-detectable unit. The organic light-emitting unit is formed on the transparent substrate for generating light. The driving unit connects to and drives the light-detectable unit and organic light-emitting unit, respectively. The controlling unit is connected to the current-detectable unit, and controls the driving unit depending on the current intensity.

Claims

1. A contrast-adjustable display via an organic light-emitting device, comprising:

a transparent substrate;

a light-detectable unit, which is formed on the transparent substrate, the light-detectable unit detecting an external light intensity and generating a current intensity according to the external light intensity;

a current-detectable unit, which is connected to the light-detectable unit and detects the current intensity;

an organic light-emitting unit, which is formed on the transparent substrate and emits light;

a driving unit, which is respectively connected to the light-detectable unit and the organic light-emitting unit, and respectively drives the light-detectable unit and the organic light-emitting unit; and

a controlling unit, which is connected to the current-detectable unit, and controls the driving unit according to the current intensity.

2. The display of claim 1, wherein the driving unit comprises:

a first driving portion, which drives the light-detectable unit; and

a second driving portion, which is controlled by the controlling unit and drives the organic light-emitting unit.

3. The display of claim 1, wherein the transparent substrate is a glass substrate.

4. The display of claim 1, wherein the transparent substrate is a plastic substrate.

5. The display of claim 1, wherein the transparent substrate is a flexible substrate.

6. The display of claim 1, wherein the light-detectable unit is an organic light-detectable unit.

7. The display of claim 6, wherein the organic light-detectable unit comprises two electrodes and an organic light-emitting layer sandwiched between the electrodes.

8. The display of claim 1, wherein the organic light-emitting unit comprises two electrodes and an organic light-emitting layer sandwiched between the electrodes.

9. The display of claim 1, wherein the driving unit is an active driving unit.

10. The display of claim 1, wherein the driving unit is a passive driving unit.

11. The display of claim 1, wherein the light-detectable unit is an inorganic light-detectable unit.

12. The display of claim 11, wherein the inorganic light-detectable unit comprises two electrodes, an n-type silicon layer, and a p-type silicon layer, the n-type silicon layer and the p-type silicon layer being sandwiched between the electrodes.

13. A contrast-adjustable display via an organic light-emitting device, comprising:

a transparent substrate;

a light-detectable unit, which is formed on the transparent substrate, the light-detectable unit detecting an external light intensity and generating a current intensity based on the external light intensity;

a first driving unit for driving the light-detectable unit;

a current-detectable unit, which is connected to the light-detectable unit and detects the current intensity;

an organic light-emitting unit, which is formed on the transparent substrate and emits light;

a second driving unit for driving the organic light-emitting unit; and

a controlling unit, which is connected to the current-detectable unit, and controls the second driving unit according to the current intensity.

14. The display of claim 13, wherein the organic light-emitting unit comprises two electrodes and an organic light-emitting layer sandwiched between the electrodes.

15. The display of claim 13, wherein the light-detectable unit is an organic light-detectable unit.

16. The display of claim 15, wherein the organic light-detectable unit comprises two electrodes and an organic light-emitting layer sandwiched between the electrodes.

17. The display of claim 13, wherein the light-detectable unit is an inorganic light-detectable unit.

18. The display of claim 17, wherein the inorganic light-detectable unit comprises two electrodes, an n-type silicon layer, and a p-type silicon layer, the n-type silicon layer and the p-type silicon layer being sandwiched between the electrodes.

19. A contrast-adjustable panel via an organic light-emitting device, comprising:

a transparent substrate;

a light-detectable unit, which is formed on the transparent substrate, the light-detectable unit detecting an external light intensity and generating a current intensity based on the external light intensity wherein the light-detectable unit is an inorganic detectable unit, the inorganic light-detectable unit including two electrodes, an n-type silicone layer, and a p-type silicone layer, the n-type silicone layer and the p-type silicone layer being sandwiched between the electrodes; and

an organic light-emitting unit, which is formed on the transparent substrate and emits light.