Method and apparatus for adjusting the color saturation in a transreflective display

• US 20040104883A1
• Filed: 02/12/2003
• Published: 06/03/2004
• Est. Priority Date: 11/29/2002
• Status: Abandoned Application

• Current Assignee: Malikie Innovations Limited (Key Patent Innovations Limited)
• Original Assignee: Malikie Innovations Limited (Key Patent Innovations Limited)
• Inventors: Drader, Marc A.
• Application Number:
  US10/366,090
• Publication Number:
  US 20040104883A1
• Time in Patent Office: Days
• US Class Current: 345/102
• CPC Class Codes: G09G 2300/0456 with a reflective area and a transmissive area combined in one pixel, such as in transflectance pixels
• CPC Class Codes: G09G 2320/0276 for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
• CPC Class Codes: G09G 2320/0606 Manual adjustment
• CPC Class Codes: G09G 2320/0626 for control of overall brightness
• CPC Class Codes: G09G 2320/0673 for control of gamma adjustment, e.g. selecting another gamma curve
• CPC Class Codes: G09G 2360/144 the light being ambient light
• CPC Class Codes: G09G 3/3406 Control of illumination source illumination devices structurally associated with liquid crystal cells G02F1/1336
• CPC Class Codes: G09G 3/3611 Control of matrices with row and column drivers

Abstract

A method for adjusting a gamma setting of a display for a mobile device is disclosed. The display has two brightness settings, where the two brightness settings include a transmissive mode setting and a reflective mode setting. The method includes: a) changing the display to a selected brightness setting; and b) changing the gamma setting of the display to a predetermined gamma setting corresponding to the selected brightness setting. The predetermined gamma setting optimizes an image on the display at the selected brightness setting. The method also includes switching a back light connected to the display, where the back light is switched to the on position in the transmissive setting and to the off position in the reflective setting.

Claims

1. A method for adjusting a gamma setting of a display having a plurality of brightness settings, the method comprising:

a) changing the display to a selected brightness setting, wherein the selected brightness setting is one of the plurality of brightness settings; and

b) changing the gamma setting of the display to a predetermined gamma setting corresponding to the selected brightness setting, the predetermined gamma setting being adapted to optimize an image on the display.

2. The method of claim 1, wherein step (a) further comprises switching a back light between an on position and an off position, wherein the plurality of brightness settings comprise a reflective mode setting where the back light is switched to the off position setting and a transmissive mode setting where the back light is switched to the on position.

3. The method of claim 2, wherein the display is an LCD.

4. The method of claim 3, wherein steps (a) and (b) occur simultaneously.

5. The method of claim 2, wherein step (b) further comprises gradually changing the gamma setting to the predetermined gamma setting for the selected brightness setting.

6. The method of claim 3, wherein step (a) further comprises choosing the selected brightness setting.

7. The method of claim 6, wherein choosing the selected brightness setting comprises actuating an input device.

8. The method of claim 7, wherein the input device is actuated by a user.

9. The method of claim 7, wherein step (b) further comprises writing to a register on a driver for the display, wherein the register is adapted to control the gamma setting for the display.

10. The method of claim 1, wherein the plurality of brightness settings comprise a plurality of reflective mode settings and a plurality of transmissive mode settings.

11. The method of claim 10, wherein step (a) further comprises switching a back light operatively connected to the display between an off position and a plurality of on positions, wherein each of the on positions corresponds to one of the plurality of transmissive mode settings.

12. The method of claim 11, wherein the back light is in the off position in each of the plurality of the reflective mode settings.

13. The method of claim 12, wherein step (a) further comprises a driver switching the back light between the on and off positions.

14. The method of claim 13, wherein step (a) further comprises a CPU switching the back light between the on and off positions.

15. The method of claim 14, wherein prior to step (a), the method further comprises:

i) detecting a variation in ambient light; and

ii) selecting one of the plurality of brightness settings adapted to optimize viewing of the display for the ambient light.

16. The method of claim 1, further comprising switching a back light between an on position and an off position, wherein the plurality of brightness settings comprise a reflective mode setting where the back light is switched to the off position setting and a transmissive mode setting where the back light is switched to the on position.

17. A computer readable medium including a computer program that adjusts a gamma setting for a display having a plurality of brightness settings, the computer program causing the computer to perform the steps of:

a) changing the display to a selected brightness setting, wherein the selected brightness setting is one of the plurality of brightness settings; and

b) changing the gamma setting of the display to a predetermined gamma setting corresponding to the selected brightness setting, the predetermined gamma setting being adapted to optimize an image on the display.

18. An apparatus for adjusting a gamma setting of a display having a plurality of brightness settings, the apparatus comprising:

a) a means for changing the display to a selected brightness setting, wherein the selected brightness setting is one of the plurality of brightness settings; and

b) a means for changing the gamma setting of the display to a predetermined gamma setting corresponding to the selected brightness setting, the predetermined gamma setting being adapted to optimize an image on the display.