Abstract: A system of estimating ambient light includes an image sensor that captures an image; a region of interest (ROI) selector that determines at least one ROI on the image; an occupancy detector that determines existence status of an object disposed on the at least one ROI; and an ambient light estimator that estimates illumination of ambient light of the at least one ROI according to luminance of the at least one ROI on the image.

Abstract: A system of estimating ambient light includes an image sensor that captures an image; a region of interest (ROI) selector that determines at least one ROI on the image; an occupancy detector that determines existence status of an object disposed on the at least one ROI; and an ambient light estimator that estimates illumination of ambient light of the at least one ROI according to luminance of the at least one ROI on the image.

Abstract: A driving circuit of a plasma display panel utilizes only one energy recovery unit for both sides of the panel capacitor. The driving circuit includes a panel capacitor having an X-side and a Y-side, a voltage clamping circuit and an energy recovery unit. The voltage clamping circuit includes four switches and is provided in parallel with the panel capacitor of the plasma display panel. The energy recovery unit is coupled between the X-side of the panel capacitor and the Y-side of the panel capacitor for charging and discharging the panel capacitor.

Abstract: A driving circuit of a plasma display panel utilizes only one energy recovery unit for both sides of the panel capacitor. The driving circuit includes a panel capacitor having an X-side and a Y-side, a voltage clamping circuit and an energy recovery unit. The voltage clamping circuit includes four switches and is provided in parallel with the panel capacitor of the plasma display panel. The energy recovery unit is coupled between the X-side of the panel capacitor and the Y-side of the panel capacitor for charging and discharging the panel capacitor.

Abstract: A method for driving a cell of a plasma display panel in a duration of a frame, in which the frame contains a plurality of subfields. The method comprises setting a selected subfield in the frame of at least one cell of a scanning line to a selected state; setting each one of the subfields preceding the selected subfield to a state opposite the selected state; setting each one of the subfields succeeding the selected subfield in the frame to the same state as a corresponding subfield of a corresponding cell in an adjacent previous scanning line; and driving the one cell by turning the cell into either an ON or OFF condition from the selected subfield throughout the succeeding subfields in the frame based on the selected state of the selected subfield. Another method is to set each one of the subfields succeeding the selected subfield in the frame, based on states of corresponding subfields of corresponding cells in an adjacent previous scanning line and an adjacent next scanning line.

Abstract: A charging/discharging circuit of a plasma display panel (PDP) driver has a first inductance having a first end connected to the first side of the panel capacitor, a first diode having an anode coupled to a second end of the first inductance, a second diode having a cathode coupled to a cathode of the first diode, a second inductance having a first end coupled to an anode of the second diode and a second end connected to the second side of the panel capacitor, a third diode having a cathode coupled to the second end of the first inductance, a fourth diode having an anode coupled to an anode of the third diode and a cathode coupled to the first end of the second inductance, and a switch coupled between the cathode of the first diode and the anode of the third diode.

Abstract: A driving circuit of a plasma display panel utilizes only one energy recovery unit for both sides of the panel capacitor. The driving circuit includes a panel capacitor having an X-side and a Y-side, a voltage clamping circuit and an energy recovery unit. The voltage clamping circuit includes four switches and is provided in parallel with the panel capacitor of the plasma display panel. The energy recovery unit is coupled between the X-side of the panel capacitor and the Y-side of the panel capacitor for charging and discharging the panel capacitor.

Abstract: A charging/discharging circuit of a plasma display panel (PDP) driver has a first inductance having a first end connected to the first side of the panel capacitor, a first diode having an anode coupled to a second end of the first inductance, a second diode having a cathode coupled to a cathode of the first diode, a second inductance having a first end coupled to an anode of the second diode and a second end connected to the second side of the panel capacitor, a third diode having a cathode coupled to the second end of the first inductance, a fourth diode having an anode coupled to an anode of the third diode and a cathode coupled to the first end of the second inductance, and a switch coupled between the cathode of the first diode and the anode of the third diode.

Abstract: A driving circuit of a plasma display panel utilizes only one energy recovery unit for both sides of the panel capacitor. The driving circuit includes a panel capacitor having an X-side and a Y-side, a voltage clamping circuit and an energy recovery unit. The voltage clamping circuit includes four switches and is provided in parallel with the panel capacitor of the plasma display panel. The energy recovery unit is coupled between the X-side of the panel capacitor and the Y-side of the panel capacitor for charging and discharging the panel capacitor.

Abstract: A method for driving a cell of a plasma display panel in a duration of a frame, in which the frame contains a plurality of subfields. The method comprises setting a selected subfield in the frame of at least one cell of a scanning line to a selected state; setting each one of the subfields preceding the selected subfield to a state opposite the selected state; setting each one of the subfields succeeding the selected subfield in the frame to the same state as a corresponding subfield of a corresponding cell in an adjacent previous scanning line; and driving the one cell by turning the cell into either an ON or OFF condition from the selected subfield throughout the succeeding subfields in the frame based on the selected state of the selected subfield. Another method is to set each one of the subfields succeeding the selected subfield in the frame, based on states of corresponding subfields of corresponding cells in an adjacent previous scanning line and an adjacent next scanning line.