Touch sensing system and method of controlling power consumption thereof

A touch sensitive display device, comprising:

• a display driving circuit configured to:
• apply video data of an input image to pixels of a display panel;
• and
• accumulate a sampled voltage;
• a plurality of sensing units configured to sample a voltage received from touch sensors coupled to the display panel;
• and
• a plurality of analog-to-digital converters configured to convert an output of the plurality of sensing units into digital data,
• wherein the sensing units and the analog-to-digital converters are divided into a plurality of groups and driven in a time division manner,
• wherein each of the plurality of groups comprises:
• at least one sensing unit, and
• at least one analog-to-digital converter,
• wherein at least one sensing unit included in a group other than a group that is powered on is powered down, and
• wherein the analog-to-digital converters are powered on, sequentially, on a per group basis.

A touch sensing system, comprising:

• a plurality of sensing units configured to:
• sample a voltage received from a touch screen;
• and
• accumulate a sampled voltage;
• a plurality of analog-to-digital converters configured to convert an output of the sensing units into digital data;
• and
• a touch screen driving circuit configured to drive the sensing units and the analog-to-digital converters on a per group basis in a time division manner,
• wherein each of the plurality of groups comprises:
• at least one sensing unit, and
• at least one analog-to-digital converter,
• wherein only a group that is powered on in an idle state among a plurality of groups outputs touch raw data,
• wherein the analog-to-digital converters are powered on, sequentially, on a per group basis,
• wherein, when the touch raw data is equal to or greater than a predetermined threshold value, the touch screen driving circuit generates an interrupt signal to be converted to an active state, and
• wherein the touch screen outputs coordinate information of a touch input only in the active state.

A touch sensitive display device, comprising:

• a display driving circuit configured to write data of an input image to pixels of a display panel;
• a plurality of sensing units configured to:
• sample a voltage received from touch sensors coupled to the display panel;
• and
• accumulate a sampled voltage;
• a plurality of analog-to-digital converters configured to convert an output of the sensing units into digital data;
• and
• a touch screen driving circuit configured to drive the sensing units and the analog-to-digital converters on a per group basis in an idle state,
• wherein each group comprises:
• at least one sensing unit, and
• at least one analog-to-digital converter,
• wherein only a group that is powered on in the idle state among a plurality of groups outputs touch raw data,
• wherein the analog-to-digital converters are powered on, sequentially, on a per group basis,
• wherein, when the touch raw data is equal to or greater than a predetermined threshold value, the touch screen driving circuit is converted to an active state, and
• wherein the touch screen driving circuit outputs coordinate information of a touch input only in the active state.

A touch sensing system, comprising:

• a plurality of sensing units configured to:
• sample a voltage received from a touch screen;
• and
• accumulate a sampled voltage;
• a plurality of analog-to-digital converters configured to convert an output from the sensing units into digital data;
• and
• a touch screen driving circuit configured to drive the sensing units and the analog-to-digital converters on a per group basis in a time division manner,
• wherein only a group that is powered on in the idle state outputs touch raw data,
• wherein the analog-to-digital converters are powered on, sequentially, on a per group basis,
• wherein when the touch raw data is equal to or greater than a predetermined threshold value, the touch screen driving circuit is converted to an active state, and
• wherein the touch screen driving circuit outputs coordinate information of a touch input only in the active state.

A touch sensitive display device, comprising:

• a display driving circuit configured to write data of an input image to pixels of a display panel;
• a plurality of sensing units configured to:
• sample a voltage received from touch sensors coupled to the display panel;
• and
• accumulate a sampled voltage;
• a plurality of analog-to-digital converters configured to convert an output of the sensing units into digital data;
• and
• a touch screen driving circuit configured to drive the sensing units and the analog-to-digital converters on a per group basis in an idle state,
• wherein each group includes:
• at least one sensing unit, and
• at least one analog-to-digital converter,
• wherein only a group that is powered on in the idle state among the plurality of groups outputs touch raw data,
• wherein the analog-to-digital converters are powered on, sequentially, on a per group basis,
• wherein, when the touch raw data is equal to or greater than a predetermined threshold value, the touch screen driving circuit is converted to an active state, and
• wherein the touch screen driving circuit outputs coordinate information of a touch input only in the active state.

A touch sensing system, comprising:

• a plurality of sensing units configured to:
• sample a voltage received from a touch screen;
• and
• accumulate a sampled voltage;
• and
• a plurality of analog-to-digital converters configured to convert an output of the sensing units into digital data,
• wherein the sensing units and the analog-to-digital converters are divided into a plurality of groups and driven in a time division manner,
• wherein at least one group including at least one sensing unit and at least one analog-to-digital converter, other than a group that is powered on, is powered down, and
• wherein the analog-to-digital converters are powered on, sequentially, on a per group basis.

A touch sensitive display device, comprising:

• a display driving circuit configured to:
• apply video data of an input image to pixels of a display panel;
• and
• accumulate a sampled voltage;
• a plurality of sensing units configured to:
• sample a voltage received from a touch screen;
• and
• accumulate a sampled voltage;
• and
• a plurality of analog-to-digital converters configured to convert an output of the sensing units into digital data,
• wherein the sensing units and the analog-to-digital converters are divided into a plurality of groups and driven in a time division manner,
• wherein at least one group including at least one sensing unit and at least one analog-to-digital converter other than a group that is powered on is powered down, and
• wherein the analog-to-digital converters are powered on, sequentially, on a per group basis.