Display panel and display panel driving method
First Claim
1. A display panel comprising:
- at least one optical element which has a pair of electrodes and exhibits an optical operation corresponding to an electric current flowing between the pair of electrodes;
at least one current line;
at least one switch circuit which supplies a memory current having a predetermined current value to the current line during a selection period, and which stops supply of the current to the current line during a non-selection period; and
at least one current memory circuit which stores current data corresponding to the current value of the memory current flowing through the current line during the selection period and, in accordance with the current data stored during the selection period, supplies a display current having a current value substantially equal to the current value of the memory current to the optical element during the non-selection period;
wherein the current memory circuit comprises a current control transistor connected in series with the optical element.
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Accused Products
Abstract
A display panel includes an optical element which has a pair of electrodes and exhibits an optical operation corresponding to an electric current flowing between the electrodes, and a switch circuit which supplies a memory current having a predetermined current value to a current line during a selection period, and stops the supply of the memory current to the current line during a non-selection period. A current memory circuit stores current data corresponding to the current value of the memory current flowing through the current line during the selection period and, in accordance with the current data stored during the selection period, supplies a display current having a current value substantially equal to the memory current to the optical element during the non-selection period.
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Citations
34 Claims
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1. A display panel comprising:
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at least one optical element which has a pair of electrodes and exhibits an optical operation corresponding to an electric current flowing between the pair of electrodes; at least one current line; at least one switch circuit which supplies a memory current having a predetermined current value to the current line during a selection period, and which stops supply of the current to the current line during a non-selection period; and at least one current memory circuit which stores current data corresponding to the current value of the memory current flowing through the current line during the selection period and, in accordance with the current data stored during the selection period, supplies a display current having a current value substantially equal to the current value of the memory current to the optical element during the non-selection period; wherein the current memory circuit comprises a current control transistor connected in series with the optical element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A display panel comprising:
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at least one optical element which has a pair of electrodes and exhibits an optical operation corresponding to an electric current flowing between the pair of electrodes; at least one current line; at least one switch circuit which supplies a memory current having a predetermined current value to the current line during a selection period, and which stops supply of the current to the current line during a non-selection period; and at least one current memory circuit which stores current data corresponding to the current value of the memory current flowing through the current line during the selection period and, in accordance with the current data stored during the selection period, supplies a display current having a current value substantially equal to the current value of the memory current to the optical element during the non-selection period; wherein the current memory circuit comprises a current control transistor connected in series with the optical element, and wherein the switch circuit comprises a current path control transistor which supplies the memory current to the current line during the selection period, and a current data write control transistor which writes the current value of the memory current flowing through the current line during the selection period as the current data between the gate and source of the current control transistor.
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17. A display panel comprising:
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at least one optical element which has a pair of electrodes and exhibits an optical operation corresponding to an electric current flowing between the pair of electrodes; at least one current line; at least one switch circuit which supplies a memory current having a predetermined current value to the current line during a selection period, and which stops supply of the current to the current line during a non-selection period; at least one current memory circuit which stores current data corresponding to the current value of the memory current flowing through the current line during the selection period and, in accordance with the current data stored during the selection period, supplies a display current having a current value substantially equal to the current value of the memory current to the optical element during the non-selection period; and a display voltage scan line which is connected to the current memory circuit, and to which a voltage for supplying the display current to the optical element is output; wherein a first end of a current path of the current memory circuit is connected to the optical element, and a second end of the current path is connected to the display voltage scan line; and wherein the display panel further comprises a display voltage scan driver which applies a voltage to the current memory circuit through the display voltage scan line during the selection period so that the memory current may flow in the current memory circuit during the selection period, and which applies a voltage to the current memory circuit through the display voltage scan line during the non-selection period so that the display current in accordance with the current data may flow in the current memory circuit during the non-selection period, wherein the current value of the display current is substantially equal to the current value of the memory current flowing in the current memory circuit during the selection period. - View Dependent Claims (18)
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19. A display panel comprising:
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at least one optical element which has a pair of electrodes and exhibits an optical operation corresponding to an electric current flowing between the pair of electrodes; at least one current line; at least one switch circuit which supplies a memory current having a predetermined current value to the current line during a selection period, and which stops supply of the current to the current line during a non-selection period; at least one current memory circuit which stores current data corresponding to the current value of the memory current flowing through the current line during the selection period and, in accordance with the current data stored during the selection period, supplies a display current having a current value substantially equal to the current value of the memory current to the optical element during the non-selection period; a display voltage scan line to which a voltage for supplying the display current to the optical element is output; and a selection scan line to which a selection scan signal for selecting the switch circuit is output, wherein the current memory circuit comprises a current control transistor which has a current path having a first end connected to the optical element and a second end connected to the display voltage scan line, and wherein the switch circuit comprises; a current data write control transistor which has a control terminal connected to the selection scan line, and a current path having a first end connected to the control terminal of the current control transistor and a second end connected to one of the display voltage scan line and the selection scan line; and a current path control transistor which has a control terminal connected to the selection scan line, and a current path having a first end connected to the current line and a second end connected to the first end of the current control transistor. - View Dependent Claims (20, 21, 22)
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23. A display panel driving method for driving a display panel, comprising:
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supplying a memory current having a predetermined current value to a current memory circuit of the display panel and storing current data corresponding to the current value to the current memory circuit during a selection period; and supplying, to an optical element of the display panel during a non-selection period, a display current having a current value substantially equal to the current value of the memory current in accordance with the current data stored in the current memory circuit; wherein the memory current supplied to the current memory circuit is not supplied not through the optical element. - View Dependent Claims (24)
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25. A display panel driving method for driving a display panel, comprising:
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supplying a memory current having a predetermined current value to a current memory circuit of the display panel and storing current data corresponding to the current value to the current memory circuit during a selection period; and supplying, to an optical element of the display panel during a non-selection period, a display current having a current value substantially equal to the current value of the memory current in accordance with the current data stored in the current memory circuit; wherein the current memory circuit comprises;
(i) a current control transistor which has a current path having a first end connected to a first end of the optical element and a second end connected to a display voltage scan line, and (ii) a capacitor which is connected between a gate and a source of the current control transistor and which stores the current data. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34)
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Specification