Display panel and driving method for display panel
AssigneeFujitsu Limited
InventorsShigetoshi Tomio, Toshio Ueda
Life of this patent
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Abstract
A flat panel display operates at a low level of power consumption without limiting a display rate and produces an image display of stable brightness, suppressing any change in brightness resultant from a change in the display rate or in a level of a display voltage, Vs. A turn on frequency control unit controls the turn on frequency of the display as a function of the frequency of discharge-sustaining voltage pulses, a current detecting unit detects a level of current flowing into the cell portions of the display panel, and a current converting value setting unit arbitrarily sets a converging value of the current that flows into the cell portions.
Claims20
A display panel comprising:
- at least two electrode arrays, each array having a plurality of electrodes forming corresponding cell portions that constitute corresponding pixels and each of said cell portions having a function of selectively emitting light in accordance with selection thereof by suitable display data and energization of the selected cell portions by drive voltage pulses applied to said corresponding electrodes and selectively producing a flow of current into the selected cell portions;
- a controller controlling the level of the current flowing into the selected cell portions, the level of which increases with an increase in the turn-on display rate of said selected cell portions;
- a current detector detecting the level of the current flowing into said cell portions;
- and
- a current converging value setting unit arbitrarily setting a converging value of the current flowing into said cell portions.
A display panel system comprising plural display panels arranged in a desired form, each display panel further comprising:
- at least two electrode arrays, each array having a plurality of electrodes forming corresponding cell portions that constitute respective pixels and each of said cell portions having a function of selectively emitting light in accordance with selection thereof by suitable display data and energization of the selected cell Portions by drive voltage pulses applied to said electrodes and producing a flow of current into the selected cell portions;
- a controller controlling the level of the current flowing into the selected cell portions, the level of which increases with an increase in the turn-on display rate of said cell portions;
- a current detector detecting the level of selected the current flowing into said cell portions;
- and
- a current converging value setting unit arbitrarily setting a converging value of the current flowing into said cell portions.
A method of controlling a display panel comprising at least two electrode arrays, each array having a plurality of electrodes forming respective cell portions that constitute corresponding pixels and each of said cell portions having a function of selectively emitting light in accordance with selection thereof by suitable display data and energization of the selected cell portions by drive voltage pulses applied to said respective electrodes and selectively producing a corresponding flow of current into the selected cell portions, comprising:
- setting a current converging value to a given value so that the level of the current flowing into said selected cell portions is controlled to a predetermined value;
- detecting the level of the current flowing into said cell portions;
- and
- controlling said current to have a level of the predetermined value in response to said detected current level.
Dependencies are inferred from the claim text.