Apparatus and method for driving luminescent display panel
AssigneeTohoku Pioneer Corporation
InventorsNaoki Yazawa, Koji Henmi, Gen Suzuki, Keisuke Moriya, Takeshi Okuyama
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Abstract
In an apparatus for driving a luminescent display panel, in a state in which scanning lines are sequentially scanned to drive and illuminate light-emitting elements, a voltage peak value arising in a scanning line in a non-scanning state is held by a capacitor through parasitic capacitance of the light-emitting element in a non-scanning state. On the basis of the voltage value held by the capacitor, a reverse bias voltage to be output from a reverse bias voltage generation circuit is controlled, and the voltage is supplied to the scanning lines.
Claims23
An apparatus for driving a luminescent display panel, the panel including a plurality of drive lines and scanning lines, which cross each other, and a plurality of capacitive light-emitting elements, wherein the light-emitting elements are connected to the drive lines and scanning lines at respective interconnections and have polarities, the apparatus comprising:
- reverse bias voltage generation means which changes a value of a reverse bias voltage to be applied to the scanning lines in accordance with a forward voltage value of a light-emitting element obtained in an illuminated state,
- wherein said value of said reverse bias voltage changes in response to obtaining said forward voltage value,
- wherein a voltage corresponding to the forward voltage value of the light-emitting element obtained in an illuminated state is acquired from a line voltage of the corresponding scanning line obtained when the light-emitting element is in a non-scanning state.
A method of driving a luminescent display panel, the panel comprising:
- a plurality of drive lines and scanning lines which cross each other;
- and
- a plurality of capacitive light-emitting elements connected to the drive lines and scanning lines at respective interconnections and have polarities, wherein, in a state in which a light-emitting element is driven and illuminated by means of setting any one of the scanning lines as a reference potential, control is performed for changing a value of a reverse bias voltage to be applied to the scanning line, as required, in response to a voltage developing in a scanning line in a non-scanning state via parasitic capacitance of the light-emitting element in a non-scanning state.
A display, comprising:
- a plurality of first conductive lines;
- a plurality of second conductive lines;
- a plurality of light-emitting elements respectively connected between the first conductive lines and the second conductive lines;
- a reverse bias voltage generation circuit that inputs a forward voltage applied across a particular light-emitting element of the plurality of light-emitting elements,
- wherein the reverse bias voltage generation circuit changes a value of a reverse bias voltage to be applied to at least one of the second conductive lines based on, and in response to, the forward voltage value that was input,
- wherein the forward voltage corresponds to a voltage value of the particular light-emitting element in an illuminated state, and
- wherein the forward voltage is input when the particular light-emitting element is not being scanned.
Dependencies are inferred from the claim text.