Organic electroluminescent display

• US 20050122053A1
• Filed: 02/20/2004
• Published: 06/09/2005
• Est. Priority Date: 12/09/2003
• Status: Abandoned Application

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Ko, Chung-Wen
• Application Number:
  US10/784,058
• Publication Number:
  US 20050122053A1
• Time in Patent Office: Days
• US Class Current: 315/169.300
• CPC Class Codes: H10K 2102/3031 Two-side emission, e.g. transparent OLEDs [TOLED]
• CPC Class Codes: H10K 50/85 Arrangements for extracting light from the devices
• CPC Class Codes: H10K 50/856 comprising reflective means
• CPC Class Codes: H10K 50/86 Arrangements for improving contrast, e.g. preventing reflection of ambient light
• CPC Class Codes: H10K 59/13 comprising photosensors that control luminance
• CPC Class Codes: H10K 59/50 OLEDs integrated with light modulating elements, e.g. with electrochromic elements, photochromic elements or liquid crystal elements
• CPC Class Codes: H10K 59/875 Arrangements for extracting light from the devices
• CPC Class Codes: H10K 59/878 comprising reflective means
• CPC Class Codes: H10K 59/8791 Arrangements for improving contrast, e.g. preventing reflection of ambient light

Abstract

An organic electroluminescent display. The display has a transparent display panel, a reflective sheet and a brightness regulating film between the substrate and the reflective sheet. The regulating film is able to adjust the light intensity transmitting thereof.

Claims

1. An organic electroluminescent display, comprising:

a transparent display panel;

a reflective sheet; and

a brightness regulating film for light transmission between the transparent display panel and the reflective sheet.

2. The display as claimed in claim 1, wherein the transparent display panel further comprises:

a transparent substrate;

a first transparent electrode over the transparent substrate;

a light-emitting layer over the first transparent electrode; and

a second transparent electrode over the light-emitting layer.

3. The display as claimed in claim 2, wherein the light-emitting layer is an organic electroluminescent film.

4. The display as claimed in claim 1, wherein the brightness regulating film is an optical slit to control light transmission from the environment.

5. The display as claimed in claim 4, wherein the brightness regulating film is made of electrochromic material or liquid crystal capable for controlling light transmission thereon by adjusting current applied thereto.

6. The display as claimed in claim 1, further comprising a photo sensor to detect light intensity of the environment.

7. The display as claimed in claim 6, wherein the brightness regulating film adjusts the light transmission intensity from the environment according to a light intensity of the environment detected by the photo sensor.

8. The display as claimed in claim 1, wherein the brightness regulating film adjusts a light-transmitting mode thereof by controlling current intensity applied thereon according to a light intensity of the environment as detected by the photo sensor.