Touch panel control apparatus, touch panel control method, and input display apparatus
AssigneeSharp Kabushiki Kaisha
InventorKUNIAKI MATSUI
Life of this patent
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Abstract
In a touch panel display serving as an input display apparatus, a video signal input into a scaler is converted into a signal meeting a signal input condition of a liquid crystal module. The scaler generates a pseudo horizontal synchronization signal synchronized with a horizontal synchronization signal included in the converted video signal. An amount of delay corresponding to a kind of signal is given to the pseudo horizontal synchronization signal by a delay circuit and the pseudo horizontal synchronization signal is supplied to a touch panel control board. The touch panel control board disables the operation of a touch panel during a predetermined standby period based on a delayed horizontal synchronization signal generated by the delay circuit.
Claims11
A touch panel control apparatus controlling a touch panel that is provided so that a screen of a display apparatus is overlaid with the touch panel and that outputs a position signal corresponding to a position where the touch panel is touched by a user, the touch panel control apparatus comprising:
- a conversion circuit that is capable of accepting input of first video signals of multiple kinds and that converts the first video signal that is input into a second video signal meeting a signal input condition of the display apparatus and supplies the second video signal after the conversion to the display apparatus;
- a first generation circuit that generates a first synchronization signal synchronized with a horizontal synchronization signal included in the second video signal;
- a delay circuit that gives an amount of delay corresponding to a kind of the first video signal input into the conversion circuit to the first synchronization signal;
- and
- a disabling control circuit that disables an operation of the touch panel during a predetermined disabled period based on a delayed signal generated by the delay circuit,
- wherein the amount of delay is set in advance so that a period when noise occurs is within the disabled period, the noise appearing in the position signal due to driving of a gate of the display apparatus.
A touch panel control method of controlling a touch panel that is provided so that a screen of a display apparatus is overlaid with the touch panel and that outputs a position signal corresponding to a position where the touch panel is touched by a user, the touch panel control method comprising:
- converting a first video signal that is input into a second video signal meeting a signal input condition of the display apparatus and supplying the second video signal after the conversion to the display apparatus;
- generating a first synchronization signal synchronized with a horizontal synchronization signal included in the second video signal;
- giving an amount of delay corresponding to a kind of the first video signal that is input in the converting to the first synchronization signal;
- and
- disabling an operation of the touch panel during a predetermined disabled period based on a delayed signal generated in the giving of the amount of delay,
- wherein the amount of delay is set in advance so that a period when noise occurs is within the disabled period, the noise appearing in the position signal due to driving of a gate of the display apparatus.
Dependencies are inferred from the claim text.