# US 9,437,125 B2 · Method and device for obtaining image signals

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- Number: US 9,437,125 B2
- Document ID: US9437125B2
- Status: Granted
- Kind: B2
- Application number: 14/131,911
- Filed: 2013-12-24
- Published: 2015-06-18
- Granted: 2016-09-06
- Earliest claimed: 2013-12-17
- Assignees: Shenzhen China Star Optoelectronics Technology Co., Ltd.
- Applicants: Shenzhen China Star Optoelectronics Technology Co., Ltd
- Inventors: Lixuan Chen
- Web page: https://patentgrep.com/patent/US9437125B2

## CPC

- G09G 3/003: {to produce spatial visual effects}
- H04N 13/122: Improving the three-dimensional [3D] impression of stereoscopic images by modifying image signal contents, e.g. by filtering or adding monoscopic depth cues (H04N13/128 takes precedence)
- G09G 3/3611: {Control of matrices with row and column drivers}
- G09G 2320/0209: Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display
- G09G 2320/0271: Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
- H04N 13/341: using temporal multiplexing
- 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)
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

The present invention provides a method and a device for obtaining image signals. The method comprising steps of: measuring a luminance signal of a grayscale switching screen of a to-be-sampled grayscale; and processing the luminance signal of the grayscale switching screen of the to-be-sampled grayscale by a two-dimensional nonlinear fitting operation which is executed based on a two-dimensional least squares method. The present invention further provides the device for obtaining image signals. The present invention introduces the two-dimensional nonlinear fitting operation to the luminance signal of the grayscale switching screen of the to-be-sampled grayscale, so as to efficiently obtain luminance signals of different grayscale switching screens.

## Claims

### Claim 1

A method for obtaining image signals, comprising steps of:
measuring a luminance signal of a grayscale switching screen of a to-be-sampled grayscale, wherein a grayscale before switching the screen is set to 0, and the luminance signals of the screen of 17 grayscales are measured after switching; the grayscale before switching the screen is set to 16, and the luminance signal after switching the screen of 17 grayscales are measured after switching, until the grayscale before switching the screen is set to 255; and
processing the luminance signal of the grayscale switching screen of the to-be-sampled grayscale by a two-dimensional nonlinear fitting operation to obtain a luminance signal of a full grayscale switching screen; and
compensating the luminance of a luminance signal of a low grayscale switching screen in the full grayscale switching screen, wherein the luminance signal after compensating is about 30% of the luminance signal representing the surface of the luminance signals of the full grayscale switching screen obtained by the two-dimensional nonlinear fitting operation;
wherein the two-dimensional nonlinear fitting operation is executed based on a two-dimensional method of least squares method, and a grayscale of the low grayscale switching screen after switching a screen is from 0 to 48.