Display device of a mobile phone having a sub memory

• US 20050140566A1
• Filed: 11/16/2004
• Published: 06/30/2005
• Est. Priority Date: 12/10/2003
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Original Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Inventors: Kim, Hyoung-Rae, Kim, Wan-Jung
• Granted Patent: US 7,864,134 B2
• Time in Patent Office: Days
• US Class Current: 345/1.100
• CPC Class Codes: G06F 3/1431 using a single graphics controller
• CPC Class Codes: G09G 2340/10 Mixing of images, i.e. displayed pixel being the result of an operation, e.g. adding, on the corresponding input pixels
• CPC Class Codes: G09G 2340/12 Overlay of images, i.e. displayed pixel being the result of switching between the corresponding input pixels
• CPC Class Codes: G09G 3/3611 Control of matrices with row and column drivers
• CPC Class Codes: H04M 1/0214 Foldable telephones, i.e. with body parts pivoting to an open position around an axis parallel to the plane they define in closed position combined with translation movement H04M1/0235
• CPC Class Codes: H04M 1/0266 for a display module assembly
• CPC Class Codes: H04M 2250/16 including more than one display unit
• CPC Class Codes: H04W 52/027 by controlling a display operation or backlight unit
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Provided is a display device of a mobile phone with a sub memory. The display device includes a display panel for displaying application data and state display data corresponding to a main image data signal used to display various application data and a sub image data signal including state display data and picture control signals, a sub memory for storing state display data and picture control signals for outputting state display data and picture control signals to the display panel, and a display driver which drives images or data to be displayed on the display panel.

Claims

1. A display device comprising:

a display panel, which receives a first image data signal used to display application data and a second image data signal including state display data and a picture control signal, and displays the application data and state display data;

a first memory, which stores the state display data and the picture control signal, and outputs the state display data and the picture control signal to the display panel; and

a display driver, which controls one of an image and data so that one of the image and data is displayed on the display panel.

2. The display device of claim 1 further comprising:

a row address decoder, which receives the state display data stored in the first memory, and maps the state display data onto an area of the display panel.

3. The display device of claim 1, wherein the first memory is refreshed with new second image data when a new second image data signal is input, the first memory is not refreshed when the new second image data signal is not input, and the second image data stored in the first memory is output to the display panel.

4. The display device of claim 1, wherein when the application data is not displayed, the second image data signal and the picture control signal are input and stored in the first memory, and the stored state display data is output.

5. The display device of claim 4, wherein the state display data is output to an area of the display panel.

6. The display device of claim 1, wherein the application data and the state display data are displayed such that they overlap in a first display area when they are output to the first display area.

7. The display device of claim 1, further comprising:

an on-screen display (OSD) controller for controlling an overlap of data on the display panel such that one of the state display data is blocked by the application data, the state display data is semi-transparently displayed on the application data, and the application data is blocked by the state display data.

8. The display device of claim 1, wherein the display panel is a mobile phone display device.

9. The display device of claim 1, wherein the display panel includes a first display panel and second display panel of a dual folder of a mobile phone.

10. The display device of claim 9, wherein when the mobile phone is in a standby mode, the first memory operates as a memory for storing the data displayed on the second display panel.

19. The display device of claim 1, wherein display control of the state display data and the application data is performed using the display controller.

11. A display device comprising:

a first display device, wherein the first display device is a main screen display;

a second display device, wherein the second display device is a sub screen display;

a sub memory, which stores state display data and a picture control signal output from a display controller, and outputs the state display data and the picture control signal to the first and second display devices; and

a display driver, which drives one of an image and data on the first and second display devices;

wherein the first and second display devices receive a main image data signal for displaying application data from the display controller, receive a state display data signal used to display the state display data from the sub memory and the picture control signal for controlling the display of the first and second display devices, and display one of the application data and the state display data in response to the picture control signal.

12. The display device of claim 11, further comprising:

a row address decoder, which receives the state display data stored in the sub memory, and maps the state display data onto an area of one of the first display device and the second display device.

13. The display device of claim 11, wherein the sub memory does not refresh one of the first display device and the second display device where the state display data is displayed, unless the picture control signal which displays one of a changed state display data signal and application data signal is not input.

14. The display device of claim 11, wherein in one of the first display device and the second display device in which the state display data and application data are displayed, the sub memory does not refresh a portion of the display area in which the state display data is displayed unless the picture control signal which displays a changed state display data signal is not input.

15. The display device of claim 11, wherein in one of the first display device and the second display device in which the application data is displayed, the sub memory does not output a signal to one of the first display device and the second display device unless the picture control signal, which displays the state display data signal, is not input.

16. The display device of claim 11, wherein the state display data is output to one of a first portion of the first display device and a first portion of the second display device.

17. The display device of claim 11, wherein the application data and the state display data are displayed such that the application data and the state display data overlap in a first display area when the state display data and the application data, which are stored in the sub memory, are output to the first display area.

18. The display device of claim 11, further comprising:

an on-screen display (OSD) controller for controlling an overlap of data on the display panel such that one of the state display data is blocked by the application data, the state display data is semi-transparently displayed on the application data, and the application data is blocked by the state display data.

20. The display device of claim 11, wherein when the display device is in a standby mode, the sub memory operates as a memory for storing data which is displayed on the second display device.