IN-CELL CAPACITIVE TOUCH SCREEN AND TOUCH CONTACT DETECTING METHOD AND SYSTEM THEREOF
First Claim
1. A method for detecting a touch contact on an in-cell capacitive touch screen, the method comprising:
- based on different gray scale pictures displayed by the in-cell capacitive touch screen in a non-touch state and a distribution of intersections of rows and columns of the in-cell capacitive touch screen, obtaining noise values corresponding to different gray scales for each of the intersections in the non-touch state;
based on a current picture displayed by the in-cell capacitive touch screen and the obtained noise values corresponding to the different gray scales for each intersection in the non-touch state, obtaining a theoretical noise value for each intersection under a condition of the current picture; and
for each of the intersections of the rows and the columns of the in-cell capacitive touch screen, compensating a detected signal at each intersection with the theoretical noise value for the intersection under the condition of the current picture to locate a position of the touch contact.
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Accused Products
Abstract
A method and system for detecting at ouch contact on an in-cell capacitive touch screen includes, based on the different gray scale pictures displayed by the in-cell capacitive touch screen in a non-touch state as well as a distribution of the intersections of rows and columns of the in-cell capacitive touch screen, obtaining noise values corresponding to different gray scales for each intersection, obtaining a theoretical noise value for each intersection under a condition of a current picture, and, for each intersection, compensating a detected signal with the theoretical noise value in the current picture to locate a position of the touch contact.
6 Citations
16 Claims
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1. A method for detecting a touch contact on an in-cell capacitive touch screen, the method comprising:
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based on different gray scale pictures displayed by the in-cell capacitive touch screen in a non-touch state and a distribution of intersections of rows and columns of the in-cell capacitive touch screen, obtaining noise values corresponding to different gray scales for each of the intersections in the non-touch state; based on a current picture displayed by the in-cell capacitive touch screen and the obtained noise values corresponding to the different gray scales for each intersection in the non-touch state, obtaining a theoretical noise value for each intersection under a condition of the current picture; and for each of the intersections of the rows and the columns of the in-cell capacitive touch screen, compensating a detected signal at each intersection with the theoretical noise value for the intersection under the condition of the current picture to locate a position of the touch contact. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system for detecting a touch contact on an in-cell capacitive touch screen, the system comprising:
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a storage module configured to store noise values corresponding to different gray scales for each intersection of rows and columns of the in-cell capacitive touch screen in a non-touch state; a theoretical noise calculation module configured to obtain a theoretical noise value for each intersection under a condition of a current picture based on the current picture displayed by the in-cell capacitive touch screen and the noise values corresponding to the different gray scales for each intersection in the non-touch state; and a touch contact detection module configured to obtain a detected signal at each intersection and compensate the detected signal at each intersection with the theoretical noise value for each intersection under the condition of the current picture to locate a position of the touch contact. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. An in-cell capacitive touch screen including a system for detecting the touch contact on the in-cell capacitive touch screen, the system comprising:
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a storage module configured to store noise values corresponding to different gray scales for each intersection of rows and columns of the in-cell capacitive touch screen in a non-touch state; a theoretical noise calculation module configured to obtain a theoretical noise value for each intersection under a condition of a current picture based on the current picture displayed by the in-cell capacitive touch screen and the noise values corresponding to the different gray scales for each intersection in the non-touch state; and a touch contact detection module configured to obtain a detected signal at each intersection and compensate the detected signal at each intersection with the theoretical noise value for each intersection under the condition of the current picture to locate a position of the touch contact.
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Specification