Image display apparatus

• US 7,227,304 B2
• Filed: 02/03/2004
• Issued: 06/05/2007
• Est. Priority Date: 02/04/2003
• Status: Expired due to Term

• Current Assignee: InnoLux Corporation
• Original Assignee: CHI MEI Optoelectronics Corporation, Kyocera Corporation
• Inventors: Miwa, Koichi, Tsujimura, Takatoshi, Oohata, Mototsugu
• Primary Examiner(s): Roy; Sikha
• Assistant Examiner(s): Quarterman; Kevin
• Application Number:
  US10/769,872
• Publication Number:
  US 20040206987A1
• Time in Patent Office: 1,218 Days
• Field of Search: 313/498, 313/501, 313/504, 313/506, 313/512, 257/40, 315/169.3
• US Class Current: 313/506
• CPC Class Codes: H01L 27/14658 X-ray, gamma-ray or corpuscular radiation imagers measuring X-, gamma- or corpuscular radiation G01T1/00

Abstract

A transparent substrate is provided thereon with a first thin film transistor and a second thin film transistor to configure a driver circuit; a conductive layer to be connected to a data line or a scan line; a conductive layer to connect the first thin film transistor with the second thin film transistor; and an anode wire layer connected to the second thin film transistor. The anode wire layer is provided thereon with a light emitting diode including a plurality of light emitting layers and electron-hole pair generating layers alternately interposed between the light emitting layers.

Claims

1. An image display apparatus comprising:

a substrate;

a Red light emitting diode on the substrate;

a Green light emitting diode on the substrate; and

a Blue light emitting diode on the substrate;

wherein each of the Red Green, and Blue light emitting diodes includes

an anode layer;

a cathode layer; and

a multi-stacked layer interposed between the anode and cathode layers and including a plurality of light emitting layers and electron-hole pair generating layers interposed between each of the light emitting layers of each of the Red, Green and Blue light emitting diodes.

2. The image display apparatus according to claim 1, wherein the light emitting layer includes an organic material.

3. The image display apparatus according to claim 1, further comprising:

a driver element that controls a current flowing through the Red, the Green, and the Blue light emitting diode and includes a thin film transistor having a channel layer composed of amorphous silicon.

4. The image display apparatus according to claim 1, wherein the electron-hole pair generating layer comprises a conductive layer having an optical transparency.

5. The image display apparatus according to claim 1, wherein the electron-hole pair generating layer comprises a metal oxide layer having optical transparency.

6. The image display apparatus according to claim 1, wherein the electron-hole pair generating layer comprises ITO (Indium Tin Oxide) layers.

7. The image display apparatus according to claim 1, wherein the electron-hole pair generating layer includes an ITO layer disposed next to the cathode layer of the Red, the Green and the Blue light emitting diode and a cesium-containing conductive layer disposed next to the anode layer of the light emitting diode.

8. The image display apparatus according to claim 1, wherein the light emitting layer emits white light, the image display apparatus further comprises an optical filter to extract a light with a certain wavelength from the white light.

9. The image display apparatus according to claim 1, wherein the light emitting layer emits a light with a wavelength of 400 nanometers or below, the image display apparatus further comprises a color modulating unit that converts the wavelength of the light emitted from the light emitting layer.

10. The image display apparatus according to claim 1, further comprising:

a device isolation layer that isolates the Red, the Green, and the Blue light emitting diode.

11. The image display apparatus according to claim 10, wherein the device isolation layer has a trapezoid shape in a vertical cross section with respect to the substrate, the trapezoid shape tapering from an upper bottom toward a lower bottom.

12. The image display apparatus according to claim 11, wherein the upper bottom of the device isolation layer is higher than an upper surface of the cathode layer.

13. The image display apparatus according to claim 1, further comprising:

a color filter that transmits a light emitted from the Red, the Green, and the Blue light emitting diode.