Display device

• US 20050140576A1
• Filed: 09/27/2004
• Published: 06/30/2005
• Est. Priority Date: 09/30/2003
• Status: Abandoned Application

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Hiramatsu, Kazunori, Sawada, Munenori, Nishizawa, Masato
• Application Number:
  US10/951,269
• Publication Number:
  US 20050140576A1
• Time in Patent Office: Days
• US Class Current: 345/30
• CPC Class Codes: G06F 3/1431 using a single graphics controller
• CPC Class Codes: G09G 2300/023 Display panel composed of stacked panels
• CPC Class Codes: G09G 2300/0486 Cholesteric liquid crystals, including chiral-nematic liquid crystals, with transitions between focal conic, planar, and homeotropic states
• CPC Class Codes: G09G 2320/0252 Improving the response speed
• CPC Class Codes: G09G 2320/103 Detection of image changes, e.g. determination of an index representative of the image change
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 3/2092 Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto suitable for both CRT and flat panel G09G5/003; specific for a CRT G09G1/165
• CPC Class Codes: G09G 3/344 based on particles moving in a fluid or in a gas, e.g. electrophoretic devices electrophoretic devices per se G02F1/167
• CPC Class Codes: G09G 3/3611 Control of matrices with row and column drivers

Abstract

An image display device according to the present invention includes an electrophoretic display member 2 that can display a predetermined image, a liquid crystal display member 3 placed in front of the electrophoretic display member 2 and which can display the predetermined image at a higher speed than the electrophoretic display member 2, and a control device that causes the electrophoretic display member 2 and the liquid crystal display member 3 to display the image corresponding to the same image data at the same position as viewed from front of the device. The control device makes the liquid crystal display member 3 transparent after the predetermined image has been displayed in the electrophoretic display member 2.

Claims

1. An image display device comprising a first display section that can display a predetermined image, a second display section placed in front of the first display section and which can display the predetermined image at a higher speed than the first display section, and a display instructing section that causes the predetermined image to be displayed at the same position in the first display section and in the second display section as viewed from front of the device, and wherein the display instructing section makes the second display section transparent after the predetermined image has been displayed in the first display section.

3. The image display device according to claim 1, comprising a touch panel placed in the front of a display screen including the first display section and the second display section to allow a user to select an image displayed in at least one of the first and second display sections or to allow the user to input information.

5. The image display device according to claim 1, wherein the number of pixels per unit area of the second display section is smaller than the number of pixels per unit area of the first display section.

6. The image display device according to claim 3, wherein the number of pixels per unit area of the second display section is smaller than the number of pixels per unit area of the first display section.

7. The image display device according to claim 5, comprising detailed display unnecessary state detecting section for detecting that a detailed image display is not required and wherein when detailed display unnecessary state detecting section detects that no detailed image display is required, the predetermined image is displayed only in the second display section.

8. The image display device according to claim 6, comprising detailed display unnecessary state detecting section for detecting that a detailed image display is not required and wherein when detailed display unnecessary state detecting section detects that no detailed image display is required, the predetermined image is displayed only in the second display section.

9. The image display device according to claim 1, wherein the first display section is a storing display member that can hold display contents while a power supply remains interrupted and the second display section is a non-storing display member from which the display contents are deleted when the power supply is interrupted.

11. The image display device according to claim 3, wherein the first display section is a storing display member that can hold display contents while a power supply remains interrupted and the second display section is a non-storing display member from which the display contents are deleted when the power supply is interrupted.

13. The image display device according to claim 5, wherein the first display section is a storing display member that can hold display contents while a power supply remains interrupted and the second display section is a non-storing display member from which the display contents are deleted when the power supply is interrupted.

14. The image display device according to claim 6, wherein the first display section is a storing display member that can hold display contents while a power supply remains interrupted and the second display section is a non-storing display member from which the display contents are deleted when the power supply is interrupted.

15. The image display device according to claim 7, wherein the first display section is a storing display member that can hold display contents while a power supply remains interrupted and the second display section is a non-storing display member from which the display contents are deleted when the power supply is interrupted.

16. The image display device according to claim 8, wherein the first display section is a storing display member that can hold display contents while a power supply remains interrupted and the second display section is a non-storing display member from which the display contents are deleted when the power supply is interrupted.

17. The image display device according to claim 3, wherein the first display section is separable from the second display section and from the touch panel.

18. The image display device according to any of claim 1, further comprising a high-speed switching display request detecting section for detecting a request for high-speed switching display of a plurality of images and wherein when the high-speed switching display request detecting section detects a request for high-speed switching display of a plurality of images, the plurality of images are sequentially displayed only in the second display section.

2. An image display device comprising a first display section that can display a predetermined image, a second display section placed behind the first display section and which can display the predetermined image at a higher speed than the first display section, and a display instructing section that causes the predetermined image to be displayed at the same position in the first display section and in the second display section as viewed from front of the device, and wherein the first display section is configured so that the display of the second display section is visible through the first display section from front of the device, and the display instructing section brings the second display section into a non-displayed state after the predetermined image has been displayed in the first display section.

4. The image display device according to claim 2, comprising a touch panel placed in the front of a display screen including the first display section and the second display section to allow a user to select an image displayed in at least one of the first and second display sections or to allow the user to input information.

10. The image display device according to claim 2, wherein the first display section is a storing display member that can hold display contents while a power supply remains interrupted and the second display section is a non-storing display member from which the display contents are deleted when the power supply is interrupted.

12. The image display device according to claim 4, wherein the first display section is a storing display member that can hold display contents while a power supply remains interrupted and the second display section is a non-storing display member from which the display contents are deleted when the power supply is interrupted.

19. The image display device according to claim 2, further comprising a high-speed switching display request detecting section for detecting a request for high-speed switching display of a plurality of images and wherein when the high-speed switching display request detecting section detects a request for high-speed switching display of a plurality of images, the plurality of images are sequentially displayed only in the second display section.