Organic electroluminescent printer

• US 20050285885A1
• Filed: 06/23/2005
• Published: 12/29/2005
• Est. Priority Date: 06/24/2004
• Status: Abandoned Application

• Current Assignee: ROHM Co., Ltd.
• Original Assignee: ROHM Co., Ltd.
• Inventors: Terumoto, Koji
• Application Number:
  US11/159,841
• Publication Number:
  US 20050285885A1
• Time in Patent Office: Days
• US Class Current: 347/5
• CPC Class Codes: G03G 15/04072 by laser
• CPC Class Codes: G03G 15/043 with means for controlling illumination or exposure G03G15/041 takes precedence
• CPC Class Codes: G03G 2215/0412 Electroluminescent elements, i.e. EL-array

Abstract

An organic EL printer includes an EL panel provided with red, green and blue light-emitting portions arranged in the form of a matrix to illuminate a photosensitive recording medium that is moved relative to the panel in the secondary scanning direction by one pitch distance in one pitch feed time. The printer also includes a drive controller for setting voltage application times, within the one pitch feed time, with respect to the red light-emitting portion, the green light-emitting portion and the blue light-emitting portion. The controller causes these light-emitting portions to emit light in accordance with the voltage application times. The one pitch feed time includes a non-luminescent time in addition to the voltage application times.

Claims

1. An organic EL printer comprising:

an organic EL panel for illuminating a photosensitive recording medium, the panel including a plurality of light-emitting portions disposed in form of a matrix extending both in a primary scanning direction and in a secondary scanning direction, the plurality of light-emitting portions including a red light-emitting portion, a green light-emitting portion and a blue light-emitting portion;

a moving unit for moving the recording medium and the panel relative to each other in the secondary scanning direction by one pitch distance in one pitch feed time; and

a drive controller for setting voltage application times within the one pitch feed time with respect to the red light-emitting portion, the green light-emitting portion and the blue light-emitting portion, the drive controller causing the red light-emitting portion, the green light-emitting portion and the blue light-emitting portion to emit light in accordance with the voltage application times;

wherein the one pitch feed time includes a non-luminescent time in addition to the voltage application times.

2. The printer according to claim 1, wherein each of the red light-emitting portion, the green light-emitting portion and the blue light-emitting portion has a light-emitting efficiency, the light-emitting efficiencies of these portions being different from each other.

3. The printer according to claim 1, wherein the voltage application times of the red light-emitting portion, the green light-emitting portion and the blue light-emitting portion have lengths different from each other.

4. The printer according to claim 1, wherein the voltage application time of the red light-emitting portion is longer than the voltage application time of the blue light-emitting portion, and wherein the voltage application time of the green light-emitting portion is shorter than the voltage application time of the blue light-emitting portion.

5. The printer according to claim 1, wherein the voltage application times of the red light-emitting portion, the green light-emitting portion and the blue light-emitting portion are set continuously with each other.