Display device and the driving method of the same
AssigneeHitachi Displays, Ltd.
InventorsToshihiro Sato, Hajime Akimoto, Naruhiko Kasai, Naoki Tokuda
Life of this patent
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Abstract
A plurality of organic EL elements which are arranged on a display panel lowers the brightness along with a lapse of light emitting time and hence, the power consumption is increased to maintain the brightness. However, the increase of the power consumption shortens a lifetime of the organic EL elements. To overcome this drawback, a power supply circuit which drives the display panel has a function of controlling an electric power supplied to the display panel to a fixed value or less in response to a detection signal from a detection part which detects a cathode current of the organic EL elements.
Claims9
A display device comprising:
- a display panel on which a plurality of self-luminous light emitting elements are arranged;
- a control circuit which controls the display panel;
- a signal processing circuit which inputs an image signal to the display panel in response to a control signal from the control circuit;
- and
- a power supply circuit which supplies an electric power to the display panel, wherein
- the power supply circuit restricts the electric power supplied to the display panel to a fixed value or less in response to a detection signal from a detection part which detects the power consumption of the display panel.
A display device comprising:
- a display panel on which a plurality of self-luminous light emitting elements are arranged;
- a control circuit which controls the display panel;
- a signal processing circuit which inputs an image signal to the display panel in response to a control signal from the control circuit;
- and
- a power supply circuit which supplies an electric power to the display panel, wherein
- the power supply circuit restricts the electric power supplied to the display panel to a fixed value or less in response to a detection signal from a detection part which detects a brightness level of the image signal.
A display device comprising:
- a display panel on which a plurality of self-luminous light emitting elements are arranged;
- a control circuit which controls the display panel;
- a signal processing circuit which inputs an image signal to the display panel in response to a control signal from the control circuit;
- and
- a power supply circuit which supplies an electric power to the display panel, wherein
- the power supply circuit and the signal processing circuit restrict the electric power supplied to the display panel to a fixed value or less in response to a detection signal from a detection part which detects the power consumption of the display panel.
A display device comprising:
- a display panel on which a plurality of self-luminous light emitting elements are arranged;
- a control circuit which controls the display panel;
- a signal processing circuit which inputs an image signal to the display panel in response to a control signal from the control circuit;
- and
- a power supply circuit which supplies an electric power to the display panel, wherein
- the power supply circuit restricts the electric power supplied to the display panel to a fixed value or less in response to a detection signal from a power restricting circuit which restricts the power consumption of the display panel.
A display method comprising the steps of:
- supplying an electric power to a display panel from a power supply circuit;
- and
- displaying an image on the display panel in response to an image signal from a signal processing circuit and a control signal from a control circuit, wherein
- the power supply circuit restricts an electric power supplied to the display panel to a fixed value or less in response to a detection signal from a detection part which detects the power consumption of the display panel.
Dependencies are inferred from the claim text.