Method and device of rapidly generating a gray-level versus brightness curve of a display
AssigneeWistron Corporation
InventorsMang Ou-Yang, Shih-Wei Huang, Jiun-Chian Liao, Gordon Horng, Tsang-Hsing Lee, Yih-Shyang Chen
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Abstract
A method for rapidly generating the gray-level versus brightness curve of a display includes the step of obtaining a portion of the gray-level values and their corresponding brightness values. These values are then used in a mathematical formula to find variables to obtain the gray-level versus brightness curve.
Claims18
A method of rapidly generating a gray-level versus brightness curve of a display by obtaining a portion of gray-level values and corresponding brightness values of the display, the method comprising:
- step A:
- obtaining n sets of (tj, Yj) values, wherein:
- j=1˜n, 4≦n≦30;
- tj is the jth gray-level value;
- Yj is a corresponding measured brightness value of the jth gray-level value (tj) displayed on the display;
- step B:
- inputting the n sets of (tj, Yj) values into at least one mathematical formula, wherein the at least one mathematical formula comprises a first mathematical formula:
- Y
- j
- =
- L
- max
- (
- 1
- +
- ⅇ
- a
- -
- f
-
- (
- tj
- )
- )
- wherein:
- Lmax is the maximum brightness of the gray-level versus brightness curve of the display;
- a is a variable;
- e is an exponent;
- f(t) is a function of t, wherein f(t) comprises a plurality of variables;
- and
- step C:
- inputting all variable values obtained from step B into the first mathematical formula to represent a gray-level versus brightness curve.
A device for obtaining a gray-level versus brightness curve for a color display, the device comprising:
- a signal generator for generating a gray-level diagram of n different gray-level values for input into the color display, wherein the n different gray-level values are defined as tj, j=1˜n, and 4≦n≦30;
- a light sensor for capturing the gray-level diagram displayed by the color display;
- a color analyzer connected to the light sensor to obtain the image on the color display and measuring a corresponding n brightness values for each gray-level diagram, wherein the n brightness values are defined as Yj, j=1˜n, and 4≦n≦30;
- a computer connected to the color analyzer to obtain the color information of the color display, the computer comprising a processor and a memory;
- the memory stored a computer software program executable by the processor;
- wherein the computer software program comprises a algorithmic program code for a first mathematical formula;
- the first mathematical formula being:
- Y
- j
- =
- L
- max
- (
- 1
- +
- ⅇ
- a
- -
- f
-
- (
- tj
- )
- )
- wherein:
- Lmax is the maximum brightness of the gray-level versus brightness curve of the display;
- a is a variable;
- e is an exponent;
- f(t) is a function of t, wherein f(t) comprises a plurality of variables;
- and
- the processor executes the computer software program to obtain the value of each variable to represent the gray-level versus brightness curve by the first mathematical formula.
Dependencies are inferred from the claim text.