# US 2017/0256235 A1 · Color display method and system for mobile terminal

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- Number: US 2017/0256235 A1
- Document ID: US20170256235A1
- Status: Published application
- Kind: A1
- Application number: 15/318,978
- Filed: 2016-04-07
- Published: 2017-09-07
- Earliest claimed: 2015-08-17
- Assignees: Huizhou Tcl Mobile Communication Co., Ltd.
- Applicants: HuiZhou TCL Mobile Communication Co., Ltd.
- Inventors: Rui WANG; Xiaoqing WANG
- Web page: https://patentgrep.com/patent/US20170256235A1

## CPC

- G09G 5/06: using colour palettes, e.g. look-up tables
- G09G 3/2003: {Display of colours (specific for liquid crystal displays G09G3/3607)}
- G09G 5/02: characterised by the way in which colour is displayed {(details of colour display specific for CRTs G09G1/28; specific for flat matrix panels other than liquid crystal displays G09G3/2003; specific for liquid crystal displays G09G3/3607)}
- G09G 2320/0242: Compensation of deficiencies in the appearance of colours
- G09G 2320/0666: for control of colour parameters, e.g. colour temperature
- G09G 2330/021: Power management, e.g. power saving
- G09G 2340/06: Colour space transformation
- G09G 2360/144: the light being ambient light
- G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00)

## Abstract

The present invention discloses a color display method and system for a mobile terminal. According to the method, an environmental ambient light level for a mobile terminal is detected, a color enhancement factor is calculated according to the ambient light level, and display color of the mobile terminal is enhanced according to the color enhancement factor. A color enhancement technology widely used in a display screen is combined with the environmental ambient light level. The color enhancement is dynamically adjusted according to the intensity of ambient light.

## Claims

### Claim 1

A color display method for a mobile terminal, comprising:
detecting an environmental ambient light level for a mobile terminal;
calculating a color enhancement factor according to a comparison of the environmental ambient light level and a first environmental ambient light level, which is preset;
detecting whether a maximum color gamut is operating on a display screen of the mobile terminal;
calculating a to-be-operated color gamut for the display screen of the mobile terminal according to the environmental ambient light level and a color gamut currently operating on the display screen of the mobile terminal when the maximum color gamut is not operating on the display screen of the mobile terminal;
enhancing display color of the mobile terminal according to the color enhancement factor; and
adjusting a color gamut operating on the display screen of the mobile terminal according to the obtained to-be-operated color gamut of the display screen of the mobile terminal.

### Claim 2 (depends on 1)

The color display method according to claim 1, wherein the step of calculating the color enhancement factor according to the comparison of the environmental ambient light level and the first environmental ambient light level comprises:
setting the color enhancement factor as a first color enhancement factor, which is preset, when L<L0, where L represents the environmental ambient light level and L0 represents the first environmental ambient light level; and
setting the color enhancement factor as Min [a0+(L−L0)/Lmax, 1] when L≧L0, where a0 represents the first color enhancement factor, and Lmax is an environmental ambient light level leading to a maximum of color enhancement.

### Claim 3 (depends on 1)

The color display method according to claim 1, wherein the step of calculating the to-be-operated color gamut for the display screen of the mobile terminal according to the environmental ambient light level and the color gamut currently operating on the display screen of the mobile terminal comprises:
calculating a color gamut factor for the display screen of the mobile terminal according to the comparison of the environmental ambient light level and the first environmental ambient light level; and
calculating the to-be-operated color gamut of the display screen of the mobile terminal according to the color gamut factor.

### Claim 4 (depends on 3)

The color display method according to claim 3, wherein the step of calculating the color gamut factor for the display screen of the mobile terminal according to the comparison of the environmental ambient light level and the first environmental ambient light level comprises:
setting the color gamut factor as zero when L<L0, where L represents the environmental ambient light level and L0 represents the first environmental ambient light level; and
setting the color gamut factor as Min [(L−L0)/Lmax, 1] when L≧L0, where Lmax is an environmental ambient light level leading to a maximum of color enhancement.

### Claim 5 (depends on 3)

The color display method according to claim 3, wherein the step of calculating the to-be-operated color gamut of the display screen of the mobile terminal according to the color gamut factor comprises:
setting the to-be-operated color gamut of the display screen of the mobile terminal as S1+b*(S0−S1), where b represents the color gamut factor, S0 is a color gamut value corresponding to the maximum color gamut operating on the display screen, and S1 is a color gamut value corresponding to the color gamut currently operating on the display screen.

### Claim 6

A color display method for a mobile terminal, comprising:
detecting an environmental ambient light level for a mobile terminal;
calculating a color enhancement factor according to the environmental ambient light level;
calculating a to-be-operated color gamut for the display screen of the mobile terminal according to the environmental ambient light level and a color gamut currently operating on the display screen of the mobile terminal;
enhancing display color of the mobile terminal according to the color enhancement factor; and
adjusting a color gamut operating on the display screen of the mobile terminal according to the obtained to-be-operated color gamut of the display screen of the mobile terminal.

### Claim 7 (depends on 6)

The color display method according to claim 6, wherein the step of calculating the color enhancement factor according to the environmental ambient light level comprises:
comparing the environmental ambient light level to a first environmental ambient light level, which is preset;
setting the color enhancement factor as a first color enhancement factor, which is preset, when L<L0, where L represents the environmental ambient light level and L0 represents the first environmental ambient light level; and
setting the color enhancement factor as Min [a0+(L−L0)/Lmax, 1] when L≧L0, where a0 represents the first color enhancement factor, and Lmax is an environmental ambient light level leading to a maximum of color enhancement.

### Claim 8

(canceled)

### Claim 9 (depends on 6)

The color display method according to claim 6, wherein the step of calculating the to-be-operated color gamut for the display screen of the mobile terminal according to the environmental ambient light level and the color gamut currently operating on the display screen of the mobile terminal comprises:
calculating a color gamut factor for the display screen of the mobile terminal according to the environmental ambient light level when the maximum color gamut is not operating on the display screen of the mobile terminal;
setting the color gamut factor as zero when L<L0, where L represents the environmental ambient light level and L0 represents the first environmental ambient light level;
setting the color gamut factor as Min [(L−L0)/Lmax, 1] when L≧L0, where Lmax is an environmental ambient light level leading to a maximum of color enhancement; and
using S=S1+b*(S0−S1) to calculate the to-be-operated color gamut of the display screen of the mobile terminal, where S represent the to-be-operated color gamut, b is the color gamut factor, S0 is a color gamut value corresponding to the maximum color gamut operating on the display screen, and S1 is a color gamut value corresponding to the color gamut currently operating on the display screen.

### Claim 10

A color display system for a mobile terminal, comprising:
a processor; and
a memory connected with processor, the memory comprising a plurality of program instructions executable by the processor, the plurality of program instructions comprising:
a light level detecting module configured to detect an environmental ambient light level for a mobile terminal;
a factor obtaining module configured to calculate a color enhancement factor according to the environmental ambient light level; and
a color adjusting module configured to enhance display color of the mobile terminal according to the color enhancement factor,
the factor obtaining module comprising:
a color gamut obtaining unit configured to calculate a to-be-operated color gamut for the display screen of the mobile terminal according to the environmental ambient light level and a color gamut currently operating on the display screen of the mobile terminal; and
a color gamut adjusting unit configured to adjust a color gamut operating on the display screen of the mobile terminal according to the obtained to-be-operated color gamut of the display screen of the mobile terminal.

### Claim 11 (depends on 10)

The color display system according to claim 10, wherein the factor obtaining module comprises:
a color enhancement factor calculation unit configured to compare the environmental ambient light level to a first environmental ambient light level, which is preset; set the color enhancement factor as a first color enhancement factor, which is preset, when L<L0, where L represents the environmental ambient light level and L0 represents the first environmental ambient light level; and set the color enhancement factor as Min [a0+(L−L0)/Lmax, 1] when L≧L0, where a0 represents the first color enhancement factor, and Lmax is an environmental ambient light level leading to a maximum of color enhancement.

### Claim 12

(canceled)

### Claim 13 (depends on 10)

The color display system according to claim 10, wherein the color gamut obtaining unit comprises:
a color gamut factor calculation unit configured to calculate a color gamut factor for the display screen of the mobile terminal according to the environmental ambient light level when the maximum color gamut is not operating on the display screen of the mobile terminal; set the color gamut factor as zero when L<L0, where L represents the environmental ambient light level and L0 represents the first environmental ambient light level; and set the color gamut factor as Min [(L−L0)/Lmax, 1] when L≧L0, where Lmax is an environmental ambient light level leading to a maximum of color enhancement; and
a color gamut calculation unit configured to use S=S1+b*(S0−S1) to calculate the to-be-operated color gamut of the display screen of the mobile terminal, where S represent the to-be-operated color gamut, b is the color gamut factor, S0 is a color gamut value corresponding to the maximum color gamut operating on the display screen, and S1 is a color gamut value corresponding to the color gamut currently operating on the display screen.

### Claim 14

(canceled)