JP2006072385A - Electronic device and electronic equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic device and an electronic apparatus capable of suppressing variation in threshold voltage of a transistor with a simple circuit configuration.
A scanning line driving circuit for supplying a scanning signal to a scanning line, a data line driving circuit for outputting a data current to the data line, and a signal for supplying a control signal to the scanning line driving circuit and the data line driving circuit. All or part of the generation circuit 11 is constituted by an IC chip.
[Selection] Figure 1

Description

  The present invention relates to an electronic device and an electronic apparatus.

  In recent years, since organic EL elements are self-luminous elements that can be driven with low power, it is expected that an electro-optical device with low power consumption, high viewing angle, and high contrast ratio can be realized.

  For example, there is an active matrix driving method as one of driving methods of an electro-optical device including a liquid crystal element, an organic EL element, an electrophoretic element, an electron emitting element, and the like. In an active matrix driving type electro-optical device, a plurality of pixel circuits are arranged in a matrix on the display panel portion, and each pixel circuit supplies driving power to the electro-optical element and the electro-optical element. Driving transistor.

  Since the driving transistor varies in characteristics such as threshold voltage for each pixel circuit, the luminance of the electro-optic element may be different for each pixel even when a data signal corresponding to the same gradation is supplied. is there. In particular, when a thin film transistor is used as the driving transistor, the variation in the threshold voltage becomes significant. Therefore, the pixel circuit is provided with a transistor for suppressing the characteristic variation of the driving transistor (Patent Document 1).

JP 2001-147659 A

  However, if a transistor for suppressing the variation in characteristics of the driving transistor is provided for each pixel circuit, the yield is lowered and the aperture ratio of the pixel circuit is reduced accordingly. For example, in the case of an organic EL element, if the aperture ratio is reduced, it is necessary to supply a larger current corresponding to the relatively reduced aperture ratio, so that power consumption is increased and the lifetime of the organic EL element is increased. Shorter.

  SUMMARY An advantage of some aspects of the invention is that it provides an electronic device and an electronic device that can suppress variation in threshold voltage of transistors with a simple circuit configuration. There is.

  A first electronic device according to the present invention includes a plurality of first signal lines, a plurality of second signal lines, a plurality of unit circuits, and a first drive that drives the plurality of first signal lines. A circuit and a second drive circuit that drives the plurality of second signal lines, each of the plurality of unit circuits being connected to the electronic element and the electronic element, and a first control terminal A first transistor including the first transistor, and an ON state in response to a control signal supplied from one of the plurality of first signal lines. Accordingly, a second transistor electrically connecting one second signal line of the plurality of second signal lines and the first transistor is supplied from the one second signal line. The charge amount corresponding to the current signal is held, and the conduction state of the first transistor And a capacitive element determining, the second driving circuit is characterized in that it is constituted by an IC chip.

  A first electronic device according to the present invention includes a plurality of first signal lines, a plurality of second signal lines, a plurality of unit circuits, and a first drive that drives the plurality of first signal lines. A circuit and a second drive circuit that drives the plurality of second signal lines, each of the plurality of unit circuits being connected to the electronic element and the electronic element, and a first control terminal A first transistor including the first transistor, and an ON state in response to a control signal supplied from one of the plurality of first signal lines. And a second transistor that electrically connects one second signal line of the plurality of second signal lines and the first transistor, and the voltage of the first control terminal Is set by the data current passing through the second transistor, Second driver circuit is characterized in that it is constituted by an IC chip.

A third electronic device according to the present invention includes a plurality of first signal lines, a plurality of second signal lines, a plurality of power supply lines, a plurality of unit circuits, and the plurality of first signal lines. A first drive circuit for driving;
A second drive circuit for driving the plurality of second signal lines; and a second control signal for generating a first control signal for controlling the first drive circuit and for controlling the second drive circuit. A signal generation circuit that generates a power supply line control circuit that generates a control signal for controlling the plurality of power supply lines, and each of the plurality of unit circuits is connected to an electronic element and the electronic element, A first transistor having a first control terminal is connected to the first transistor and according to a control signal supplied from one first signal line among the plurality of first signal lines. A second transistor electrically connecting one second signal line of the plurality of second signal lines and the first transistor, and the one second signal line. Charge amount corresponding to the current signal supplied from the signal line And a capacitive element that determines a conduction state of the first transistor, and at least a part of the first drive circuit, the second drive circuit, the signal generation circuit, and the power line control circuit Is constituted by an IC chip.

  A fourth electronic device of the present invention drives a plurality of first signal lines, a plurality of second signal lines, a plurality of power supply lines, a plurality of unit circuits, and the plurality of first signal lines. Generating a first control signal, a second drive circuit for driving the plurality of second signal lines, and a first control signal for controlling the first drive circuit, and the second drive circuit. Each of the plurality of unit circuits is connected to the electronic element, and includes a first control terminal that includes a first control terminal. Are connected to the first transistor and turned on in response to a control signal supplied from one first signal line of the plurality of first signal lines. One of the second signal lines is electrically connected to the first transistor. A second transistor to be connected; and a capacitor element that holds a charge amount according to a current signal supplied from the one second signal line and determines a conduction state of the first transistor, At least some of the first drive circuit, the second drive circuit, and the signal generation circuit are configured by an IC chip.

  A fifth electronic device according to the present invention includes a plurality of first signal lines, a plurality of second signal lines, a plurality of unit circuits, and a first drive circuit that drives the plurality of first signal lines. And a second drive circuit that drives the plurality of second signal lines, each of the plurality of unit circuits being connected to the electronic element and the electronic element, and having a first control terminal A first transistor provided and connected to the first transistor and turned on in response to a control signal supplied from one first signal line of the plurality of first signal lines; A second transistor that electrically connects one second signal line of the plurality of second signal lines and the first transistor, and the voltage of the first control terminal is , Set by a data current passing through the second transistor, Driving circuit is characterized in that it is constituted by a semiconductor integrated circuit device.

  A sixth electronic device of the present invention drives a plurality of first signal lines, a plurality of second signal lines, a plurality of power supply lines, a plurality of unit circuits, and the plurality of first signal lines. Generating a first control signal, a second drive circuit for driving the plurality of second signal lines, and a first control signal for controlling the first drive circuit, and the second drive circuit. A signal generation circuit that generates a second control signal for controlling the power supply line, and a power supply line control circuit that generates a control signal for controlling the plurality of power supply lines, each of the plurality of unit circuits including an electronic element, The first transistor connected to the electronic element and the first transistor are connected to the first transistor and according to a control signal supplied from one first signal line among the plurality of first signal lines. By turning on, one second signal out of the plurality of second signal lines. A second transistor that electrically connects a line to the first transistor, and a charge amount corresponding to a current signal supplied from the one second signal line, and the conduction of the first transistor And at least a part of the first drive circuit, the second drive circuit, the signal generation circuit, and the power line control circuit is configured by a programmable IC chip. It is characterized by that.

  In the above electronic device, it is preferable that the electronic element is in a non-forward bias or reverse bias state during at least a period in which the second transistor is on.

  In the above electronic device, it is preferable that the data current passes through the second transistor during a first period, and the electronic element is in a non-forward bias state or a reverse bias state during the first period.

  In the electronic device, the electronic element is in a non-forward bias state or a reverse bias state during a period in which a current flows through a first current path including the first transistor and the second transistor. It is preferable that the electronic element is in a forward bias state during a period in which a current flows through the second current path including the transistor and the electronic element.

  In the above electronic device, each of the plurality of unit circuits further includes a third transistor that controls electrical connection between the first terminal of the first transistor and the first control terminal. Also good.

  In the above electronic device, the transistors included in each of the plurality of unit circuits may be only the first transistor, the second transistor, and the third transistor.

  In the electronic device, it is preferable that a conduction state of the first transistor corresponds to a current level of a current supplied to the electronic element.

  The electronic device may further include a plurality of power supply lines, and the plurality of power supply lines may intersect the plurality of second signal lines.

  In the electronic device, the electronic element may be an electro-optical element, the plurality of first signal lines may be a plurality of scanning lines, and the plurality of second signal lines may be a plurality of data lines. .

  An electronic circuit according to the present invention includes a first transistor having a first terminal, a second terminal, and a first control terminal, a third terminal, and a fourth terminal, and the third terminal A second transistor having a terminal connected to the first terminal; a fifth terminal; and a sixth terminal; and an electronic element having the fifth terminal connected to the first terminal; Is there a plurality of unit circuits including a first transistor and a third transistor that controls electrical connection between the first control terminal and the sixth terminal can be set to a plurality of potentials? Alternatively, it can be electrically connected to a predetermined potential and can be electrically disconnected from the predetermined potential.

  According to this, the number of transistors constituting the unit circuit can be reduced as compared with the conventional one.

An electronic circuit according to the present invention includes a first transistor having a first terminal, a second terminal, and a first control terminal, a third terminal, and a fourth terminal, and the third terminal A second transistor having a terminal connected to the first terminal; a fifth terminal; and a sixth terminal; and an electronic element having the fifth terminal connected to the first terminal; A plurality of unit circuits including a first transistor and a third transistor for controlling electrical connection between the first control terminal and the sixth terminal connected to a potential control line; A control circuit is provided that sets the control line to a plurality of potentials, or controls electrical connection and disconnection between the potential control line and a predetermined potential.
According to this, the number of transistors constituting the unit circuit can be reduced as compared with the conventional one.

  In this electronic circuit, it is preferable that the transistors included in each of the unit circuits are only the first transistor, the second transistor, and the third transistor.

  According to this, the number of transistors used in the unit circuit can be reduced by one compared to the conventional one.

  In this electronic circuit, a capacitor element may be connected to the first control terminal.

  According to this, the level of the current flowing through the electronic element can be controlled according to the amount of charge accumulated in the capacitive element.

  In this electronic circuit, the control circuit is a fourth transistor having a ninth terminal and a tenth terminal, and the ninth terminal is connected to the sixth terminal via the potential control line. In addition, the tenth terminal may be connected to a supply line that supplies the plurality of potentials or the predetermined potential.

  According to this, the control circuit can be easily configured.

  In this electronic circuit, the electronic element may be a current driving element.

  According to this, the number of transistors constituting the unit circuit including the current driving element can be reduced.

  The electronic circuit of the present invention includes an electronic element, a first terminal, a second terminal, and a control terminal, and the first terminal is connected to one end of the electronic element and supplied to the electronic element. A first transistor for controlling a level according to a conductive state; a second transistor connected to the first transistor; and a control circuit connected to the other end of the electronic element, the first transistor and During the period when the current flows through the first current path including the second transistor, the electronic element is prevented from flowing, and includes the first transistor and the electronic element when the second transistor is turned off. And a control circuit for controlling the current to flow in the second current path.

  According to this, the number of transistors constituting the unit circuit can be reduced.

  The electronic circuit may further include a capacitive element that is connected to the control terminal and holds a charge amount according to a current level of a current flowing through the first current path.

  According to this, the number of transistors constituting the unit circuit can be reduced.

  The electronic circuit driving method of the present invention includes an electronic element, a first transistor having a first terminal, a second terminal, and a control terminal, the first transistor having the first terminal connected to the electronic element, A driving method of an electronic circuit including a capacitive element connected to the control terminal and a second transistor connected to the first terminal, wherein a potential at the other end of the electronic element is applied to the electronic element. A current that is set to a potential at which no current flows, supplies current to a first current path including at least the first transistor and the second transistor, and passes through the first current path. A step of accumulating a charge amount according to a level in the capacitive element, and setting a potential at the other end of the electronic element to a potential at which a current flows through the electronic element, and in accordance with the charge amount of the electronic element. Current level current And supplying.

  According to this, it is possible to drive an electronic circuit that can reduce the number of transistors constituting the unit circuit.

  Another electronic device according to the present invention is an electronic device including a plurality of first signal lines, a plurality of second lines, and a plurality of unit circuits, each of the plurality of unit circuits being An electronic element that includes a first electrode and a second electrode, and that is driven according to a current level of a current flowing between the first electrode and the second electrode, and is connected to the first electrode. A first transistor that controls the current level according to a conduction state; and a control signal that is connected to the first transistor and that is supplied from one first signal line of the plurality of first signal lines. In response, the second transistor electrically connecting one second signal line of the plurality of second signal lines and the first transistor, and the first signal Holds the amount of charge according to the current signal supplied from the wire, and A capacitor element that determines a conduction state of the first transistor, and at least during a period in which the second transistor is in an on state, the potential of the second electrode is set so that no current flows through the electronic element. Alternatively, the second electrode is electrically disconnected from the power supply potential.

  According to this, it is possible to provide an electronic device including a plurality of unit circuits in which the number of transistors used is reduced as compared with the conventional one.

  The electro-optical device of the present invention is an electro-optical device including a plurality of scanning lines, a plurality of data lines, a plurality of unit circuits, and a plurality of power supply lines, and each of the plurality of unit circuits includes: A first transistor including a first terminal, a second terminal, and a first control terminal, wherein the second terminal is connected to one power supply line of the plurality of power supply lines; , A fourth terminal, and a second control terminal, the third terminal is connected to the first terminal, and the fourth terminal is one of the plurality of data lines. A second transistor connected to a line, wherein the second control terminal is connected to one of the plurality of scanning lines, a fifth terminal, and a sixth terminal; An electro-optic element connected to the first terminal, a seventh terminal and an eighth terminal, and the seventh terminal A capacitive element connected to the first control terminal, a third transistor for controlling electrical connection between the first terminal and the first control terminal, and the plurality of the transistors together with the sixth terminal A potential control line connected to the sixth terminal of another unit circuit of the unit circuit; and setting the potential control line to a plurality of potentials; or electrically connecting the potential control line and a predetermined potential; And a control circuit for controlling electrical disconnection.

  According to this, it is possible to provide an electro-optical device including a plurality of unit circuits in which the number of transistors used is reduced as compared with the conventional one. As a result, the aperture ratio of the pixel circuit can be improved, so that the power consumption of the electro-optical device can be reduced and the current supplied to the electro-optical element can be reduced. The lifetime can be extended.

  In this electro-optical device, it is preferable that the transistors included in each of the unit circuits are only the first transistor, the second transistor, and the third transistor.

  According to this, it is possible to provide an electro-optical device including a plurality of unit circuits in which the number of transistors used is reduced by one as compared with the conventional one.

  In this electro-optical device, the control circuit is a fourth transistor having a ninth terminal and a tenth terminal, and the ninth terminal is connected to the sixth terminal via the potential control line. In addition to being connected, the tenth terminal may be connected to a plurality of potentials or a supply line for supplying the predetermined potential.

  According to this, the control circuit can be easily configured.

  In this electro-optical device, the electro-optical element may be an EL element having a light emitting layer made of an organic material.

  According to this, the number of transistors of the unit circuit constituting the electro-optical device including the organic EL element can be reduced.

  In this electro-optical device, electro-optical elements of the same color may be arranged along one scanning line among the plurality of scanning lines.

  According to this, it is possible to provide an electro-optical device capable of full color display with fewer transistors used than the conventional one.

  The driving method of the electro-optical device according to the present invention includes a plurality of data lines, a plurality of scanning lines, and a plurality of unit circuits, and each of the plurality of unit circuits includes a first electrode and a second electrode. An electro-optical element that exhibits an optical function in accordance with a potential difference between the first terminal, a second terminal, and a first control terminal, wherein the first terminal serves as the first electrode. A first transistor connected to the capacitor; a capacitor connected to the first control terminal; a third terminal; a fourth terminal; and a second control terminal. The first terminal is connected, the fourth terminal is connected to one data line of the plurality of data lines, and the second control terminal is one scanning line of the plurality of scanning lines. And a second transistor connected to the electro-optical device, the method comprising: Is set to a potential at which the electro-optic element does not exhibit an optical function, and a scanning signal is supplied to the second control terminal via one scanning line of the plurality of scanning lines. The transistor is turned on, a data signal supplied as a current is supplied from the one data line to the first transistor through the second transistor, and a charge amount corresponding to the data signal is supplied to the capacitor A first step of accumulating in the element; supplying a scanning signal to the second control terminal via the scanning line to turn off the second transistor; and setting the potential of the second electrode to A voltage at a voltage level corresponding to the conduction state of the first transistor, which is set according to the amount of charge stored in the capacitive element, set to a potential at which the electro-optical element exhibits an optical function Other and a second step of supplying a current level of current to the electro-optical element via the first electrode.

  According to this, it is possible to drive the electro-optical device that can reduce the number of transistors constituting the unit circuit.

  In the driving method of the electro-optical device, each of the plurality of unit circuits further includes a third transistor that controls electrical connection and electrical disconnection between the first terminal and the first control terminal. Electrically connecting the first terminal and the first control terminal by turning on the third transistor in at least a part of the period in which the first step is performed. Then, in at least a part of the period during which the second step is performed, the first terminal and the first control terminal are electrically turned off by turning off the third transistor. It may be separated.

  According to this, in the first step, the capacitance element holds the charge amount relative to the data signal, and in the second step, the current corresponding to the charge amount held in the capacitance element is electro-optically generated. The element can be supplied.

  In the driving method of the electro-optical device, the electro-optical element may be an organic EL element.

  According to this, in an electro-optical device having a unit circuit in which the number of transistors used is reduced as compared with the conventional one, the electro-optical device provided in the unit circuit drives an electro-optical device that is an organic EL element. be able to.

  The electronic device of the present invention is mounted with the above electronic circuit.

  According to this, in an electronic circuit including a unit circuit that supplies a current corresponding to a data signal supplied from the outside to the electronic element, the number of transistors constituting the unit circuit is reduced by one compared to the conventional one. An electronic device including a circuit can be provided.

  The electronic apparatus of the present invention is mounted with the above electro-optical device.

  According to this, in the electro-optical device provided with the unit circuit that supplies the current corresponding to the data signal supplied from the outside to the electronic element, the number of transistors constituting the unit circuit is reduced by one compared to the conventional one. An electronic apparatus including the electro-optical device can be provided. As a result, the area occupied by the transistor with respect to the electronic circuit can be reduced, so that an electro-optical device with a high aperture ratio can be realized. Therefore, the power consumption of the electronic device can be further reduced, and the yield of the electronic device can be improved.

[First embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is a block circuit diagram showing a circuit configuration of an organic EL display as an electro-optical device. FIG. 2 is a block circuit diagram showing an internal configuration of a display panel unit and a data line driving circuit as electronic circuits. FIG. 3 is a circuit diagram of the pixel circuit. FIG. 4 is a timing chart for explaining a driving method of the pixel circuit.

  The organic EL display 10 includes a signal generation circuit 11, a display panel unit 12, a scanning line driving circuit 13, a data line driving circuit 14, and a power line control circuit 15. The signal generation circuit 11, the scanning line driving circuit 13, the data line driving circuit 14, and the power supply line control circuit 15 of the organic EL display 10 may be configured by independent electronic components. For example, each of the signal generation circuit 11, the scanning line driving circuit 13, the data line driving circuit 14, and the power supply line control circuit 15 may be configured by a one-chip semiconductor integrated circuit device. In addition, all or part of the signal generation circuit 11, the scanning line driving circuit 13, the data line driving circuit 14, and the power line control circuit 15 is configured by a programmable IC chip, and the function is software by a program written in the IC chip. May be realized.

  The signal generation circuit 11 creates a scanning control signal and a data control signal for displaying an image on the display panel unit 12 based on image data from an external device (not shown). Then, the signal generation circuit 11 outputs a scanning control signal to the scanning line driving circuit 13 and outputs a data control signal to the data line driving circuit 14. In addition, the signal generation circuit 11 outputs a timing control signal to the power supply line control circuit 15.

  As shown in FIG. 2, the display panel unit 12 is extended along the row direction with M data lines Xm (m = 1 to M; m is an integer) extending along the column direction. It has a pixel circuit 20 as a plurality of unit circuits arranged at a position corresponding to an intersection with N scanning lines Yn (n = 1 to N; n is an integer). In other words, each pixel circuit 20 is arranged in a matrix by being connected between a data line Xm extending along the column direction and a scanning line Yn extending along the row direction. Has been. Each pixel circuit 20 is connected to a power supply line VLd and a potential control line Lo extending in parallel with the scanning line Yn.

  The power supply line VLd is connected to a first voltage supply line La extending along the column direction of the pixel circuit 20 disposed on the right end side of the display panel unit 12. The first voltage supply line La is connected to a power supply unit (not shown) that supplies the drive voltage Vdd. Accordingly, each pixel circuit 20 is supplied with the drive voltage Vdd via the first voltage supply line La and the power supply line VLd.

  The potential control line Lo is connected to the control circuit TS. The control circuit TS is connected to a second voltage supply line Lb extending along the column direction of the pixel circuit 20 disposed on the right end side of the display panel unit 12. The second voltage supply line Lb is connected to the power supply unit (not shown) that supplies the cathode voltage Vo. The control circuit TS is connected to a power supply line control circuit 15 that supplies a power supply line control signal SCn to be described later for controlling the control circuit TS via the power supply line control line F. The drive voltage Vdd is set in advance so as to be larger than the cathode voltage Vo.

  As shown in FIG. 2, the pixel circuit 20 includes an organic EL element 21 whose light emitting layer is made of an organic material. Note that a transistor, which will be described later, arranged and formed in each pixel circuit 20 is usually composed of a TFT (Thin Film Transistor).

  The scanning line driving circuit 13 selects one scanning line from among the N scanning lines Yn provided in the display panel unit 12 based on the scanning control signal output from the signal generation circuit 11, and Scan signals SY1, SY2,..., SYn are output to the selected scan line.

  As shown in FIG. 2, the data line driving circuit 14 includes a plurality of single line drivers 23. Each single line driver 23 is connected to a corresponding data line Xm disposed in the display panel unit 12. The data line driving circuit 14 generates data currents Idata1, Idata2,..., IdataM based on the data control signal output from the signal generation circuit 11, respectively. The data line driving circuit 14 outputs the generated data currents Idata1, Idata2,..., IdataM to each pixel circuit 20 via the data line Xm. When the internal state of the pixel circuit 20 is set according to the data currents Idata1, Idata2,..., IdataM, the current levels of the data currents Idata1, Idata2,. Accordingly, the drive current Iel supplied to the organic EL element 21 is controlled.

  As described above, the power supply line control circuit 15 is connected to the control circuit TS via the power supply line control line F. Based on the timing control signal output from the signal generation circuit 11, the power supply line control circuit 15 is in an electrically connected state (ON state) or electrically disconnected between the potential control line Lo and the first voltage supply line La. A power supply line control signal SCn for determining the state (off state) is generated. Further, the power supply line control circuit 15 is based on the timing control signal output from the signal generation circuit 11, and is in an electrical connection state (ON state) or electrical connection between the potential control line Lo and the second voltage supply line Lb. A power supply line control signal SCn for determining the disconnection state (off state) is generated.

  Specifically, the power supply line control signal SCn is transmitted between the potential control line Lo and the second voltage supply line Lb when the potential control line Lo and the first voltage supply line La are electrically connected (on state). When the electrical control state is switched off (off state) and the potential control line Lo and the first voltage supply line La are in electrical disconnection state (off state), the potential control line Lo and the second voltage supply line Lb Is a signal for making the electrical connection state (ON state).

  The control circuit TS supplies the drive voltage Vdd or the cathode voltage Vo to the pixel circuit 20 via the potential control line Lo in accordance with the power supply line control signal SCn.

  The pixel circuit 20 of the organic EL display 10 thus configured will be described below with reference to FIG. For convenience of explanation, the pixel circuit 20 disposed between the scanning line Yn and the data line Xm will be described.

  As shown in FIG. 3, the pixel circuit 20 includes three transistors, one capacitor element, and an organic EL element 21. More specifically, the pixel circuit 20 includes a driving transistor Qd, a first switching transistor Qs1, a second switching transistor Qs2, and a holding capacitor Co. The conductivity type of the driving transistor Qd is p-type (p-channel). The conductivity types of the first and second switching transistors Qs1 and Qs2 are n-type (n-channel), respectively.

  The source of the driving transistor Qd is connected to the power supply line VLd. The drain of the driving transistor Qd is connected to the source of the first switching transistor Qs1 and the first electrode E1 of the organic EL element 21.

  A second switching transistor Qs2 is connected between the gate and drain of the driving transistor Qd. The first electrode D1 of the holding capacitor Co is connected to the gate of the driving transistor Qd. The second electrode D2 of the holding capacitor Co is connected to the power supply line VLd.

  The drain of the first switching transistor Qs1 is connected to the data line Xm. The gate of the first switching transistor Qs1 is connected to the scanning line Yn together with the gate of the second switching transistor Qs2. The second electrode E2 of the organic EL element 21 is connected to the potential control line Lo.

  A control circuit TS is connected to the potential control line Lo connected to the pixel circuit 20 configured as described above. The control circuit TS includes a pixel circuit 20 arranged along the rightmost column direction among the pixel circuits 20 arranged in a matrix on the display panel unit 12, and the first and second voltage supply lines La. , Lb.

  The control circuit TS includes a cathode voltage transistor Qo and a drive voltage transistor QDDD. The cathode voltage transistor Qo has an n-type conductivity (n-channel), and the drive voltage transistor QDD has a p-type conductivity (p-channel).

  The source of the cathode voltage transistor Qo is connected to the drain of the drive voltage transistor QDD and to the potential control line Lo. The drain of the cathode voltage transistor Qo is connected to a second voltage supply line Lb that supplies the cathode voltage Vo. The source of the drive voltage transistor QDD is connected to a first voltage supply line La that supplies the drive voltage Vdd. The gates of the cathode voltage transistor Qo and the drive voltage transistor QDD are connected to each other and to the power supply line control line F. The gates of the cathode voltage transistor Qo and the drive voltage transistor QDD are supplied with a power line control signal SCn generated by the power line control circuit 15.

  That is, the control circuit TS is shared by the pixel circuits 20 arranged in the row direction of the display panel unit 12.

  Note that the first transistor, the second transistor, and the third transistor described in the claims are, for example, the driving transistor Qd, the first switching transistor Qs1, and the second transistor in this embodiment. Each corresponds to the switching transistor Qs2. Also, the first terminal and the second terminal described in the claims correspond to, for example, the drain of the driving transistor Qd and the source of the driving transistor Qd in this embodiment, respectively. Furthermore, the first control terminal or the control terminal of the first transistor described in the claims corresponds to, for example, the gate of the driving transistor Qd in this embodiment.

  The third terminal, the fourth terminal, and the second control terminal described in the claims are, for example, in this embodiment, the drain of the first switching transistor Qs1, the first switching transistor, This corresponds to the source of Qs1 and the gate of the first switching transistor Qs1. Further, the fifth terminal and the sixth terminal described in the claims correspond to, for example, the first electrode E1 and the second electrode E2 of the organic EL element 21 in this embodiment, respectively. Yes. Furthermore, the fourth transistor described in the claims corresponds to, for example, the cathode voltage transistor Qo or the drive voltage transistor QDD in this embodiment.

In the organic EL display 10 configured as described above, when the drive voltage transistor QDD is in an electrically connected state (ON state) in accordance with the power supply line control signal SCn, the organic EL element 21 is connected via the potential control line Lo. The drive voltage Vdd is supplied to the second electrode E2, and the second electrode E2 of the organic EL element 21 is in the H state.
The drive voltage Vdd supplied to the second electrode E2 acts as a potential that does not manifest the optical function of the organic EL element 21.

  At this time, since the drive voltage Vdd is supplied to the first electrode E1 of the organic EL element 21, no current flows through the organic EL element 21. Therefore, the organic EL element 21 does not emit light.

  Further, when the cathode voltage transistor Qo is in an electrically connected state (ON state) according to the power line control signal SCn, the cathode voltage is supplied to the second electrode E2 of the organic EL element 21 through the potential control line Lo. Is done. Since the cathode voltage Vo is set to be smaller than the drive voltage Vdd, a forward bias is supplied to the organic EL element. As a result, the drive current Iel generated by the drive transistor Qd is supplied to the organic EL element 21. The luminance of the organic EL element 21 is determined according to the current level of the drive current Iel.

  Next, a driving method of the pixel circuit 20 of the organic EL display 10 configured as described above will be described with reference to FIG. In FIG. 4, the drive cycle Tc means a cycle in which the luminance of the organic EL element 21 is updated once, and is the same as a so-called frame cycle. T1 is a data writing period, and T2 is a light emission period. The driving cycle Tc is composed of a data writing period T1 and a light emission period T2.

  First, in the pixel circuit 20, the scanning signal SYn for turning on the first and second switching transistors Qs1 and Qs2 in the data writing period T1 is supplied from the scanning line driving circuit 13 through the scanning line Yn. . At this time, the power supply line control circuit 15 supplies the power supply line control signal SCn for turning off the cathode voltage transistor Qo to the gate of the cathode voltage transistor Qo via the power supply line control line F.

  Then, the first and second switching transistors Qs1 and Qs2 are turned on. As a result, the data current IdataM is supplied to the holding capacitor Co via the first switching transistor Qs1 and the second switching transistor Qs2. As a result, the voltage Vo corresponding to the amount of charge corresponding to the current level of the data current IdataM is held in the holding capacitor Co. At this time, since the driving transistor Qd is set in advance to operate in the saturation region, characteristic variations such as the threshold voltage and mobility of the driving transistor Qd are compensated.

  At this time, the power supply line control signal SCn for turning on the drive voltage transistor QDD from the power supply line control circuit 15 is supplied to the control circuit TS, so that the drive voltage transistor QDD is turned on. As a result, the drive voltage Vdd is supplied to the second electrode E2 of the organic EL element 21.

  Therefore, as shown in FIG. 4, the second electrode E2 of the organic EL element 21 is at the drive voltage Vdd, so that the organic EL element 21 is in a non-forward bias state or a reverse bias state. For this reason, the organic EL element 21 does not emit light.

  Subsequently, after the end of the data writing period T1, in the light emission period T2, scanning for turning off the first switching transistor Qs1 and the second switching transistor Qs2 from the scanning line driving circuit 13 via the scanning line Yn. A signal SYn is supplied. Then, the first switching transistor Qs1 and the second switching transistor Qs2 are turned off.

  At this time, the power supply line control circuit 15 supplies the power supply line control signal SCn for turning on the cathode voltage transistor Qo to the control circuit TS, so that the cathode voltage transistor Qo is turned on. As a result, the cathode voltage Vo is supplied to the second electrode E2 of the organic EL element 21, and the second electrode E2 of the organic EL element 21 is in the L state.

  That is, as shown in FIG. 4, the second electrode E2 of the organic EL element 21 has a cathode voltage Vo, and the potential of the second electrode E2 is lower than that of the first electrode E1. The forward bias is supplied.

  As a result, a drive current Iel having a magnitude corresponding to the voltage Vo held in the holding capacitor Co in the data writing period T1 flows in the organic EL element 21. Therefore, the luminance gradation of the organic EL element 21 is accurately controlled according to the data current IdataM.

  As described above, the pixel circuit 20 controls the luminance gradation of the organic EL element 21 with high accuracy according to the data current IdataM while reducing the number of transistors formed therein by one compared to the conventional one. be able to. Therefore, the pixel circuit 20 can improve the yield and the aperture ratio in manufacturing the organic EL display 10.

  According to the electronic circuit and the electro-optical device of the above-described embodiment, the following characteristics can be obtained.

(1) In the present embodiment, the pixel circuit 20 is configured by the driving transistor Qd, the first switching transistor Qs1, the second switching transistor Qs2, the holding capacitor Co, and the organic EL element 21.
A control circuit TS that is connected to the second electrode E2 of the organic EL element 21 via the potential control line Lo and sets the potential of the second electrode E2 to the drive voltage Vdd or the cathode voltage Vo is connected to the plurality of pixel circuits 20. Provided in common.

Accordingly, the pixel circuit 20 can reduce the number of transistors formed therein by one as compared with the conventional pixel circuit while compensating for variations in threshold voltage, mobility, and the like of the driving transistor Qd. . As a result, the pixel circuit 20 can provide the organic EL display 10 capable of controlling the luminance gradation of the organic EL element 21 with high accuracy and improving the yield and aperture ratio in the manufacture of the transistor. it can.
[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIG. In the present embodiment, the same constituent members as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  FIG. 5 is a block circuit diagram showing an internal configuration of the display panel unit 12a and the data line driving circuit 14 of the organic EL display 10. As shown in FIG. In the present embodiment, the display panel unit 12a includes a red pixel circuit 20R having an organic EL element 21 that emits red light, and a green pixel circuit 20G having an organic EL element 21 that emits green light. And a blue pixel circuit 20B having an organic EL element 21 that emits blue light. The circuit configurations of the red, green, and blue pixel circuits 20R, 20G, and 20B are the same as the circuit configuration of the pixel circuit 20 described in the first embodiment.

  More specifically, in the display panel unit 12a, pixel circuits 20R, 20G, and 20B of the same color are arranged along the extending direction of the scanning line Yn. The driving transistor Qd and the holding capacitor Co constituting the red pixel circuit 20R are respectively connected to the red first voltage supply line LaR for supplying the corresponding red driving voltage VddR through the power supply line VLd. It is connected. Further, the driving transistor Qd and the holding capacitor Co constituting the green pixel circuit 20G are respectively connected to the first green voltage supply line LaG for supplying the corresponding green driving voltage VddG via the power supply line VLd. It is connected. Further, the driving transistor Qd and the holding capacitor Co constituting the blue pixel circuit 20B are respectively connected to the blue first voltage supply line LaB that supplies the corresponding blue driving voltage VddB through the power supply line VLd. It is connected.

  The red, green, and blue drive voltages VddR, VddG, and VddB are respectively the drive voltage of the drive transistor Qd that forms the red pixel circuit 20R, the drive voltage of the drive transistor Qd that forms the green pixel circuit 20G, and This is the drive voltage of the drive transistor Qd constituting the blue pixel circuit 20B.

  Next, a method for driving the pixel circuits 20R, 20G, and 20B of the organic EL display 10 configured as described above will be described.

  First, the first scanning signal SY1 for turning on the first and second switching transistors Qs1 and Qs2 of the red pixel circuit 20R is supplied from the scanning line driving circuit 13 via the first scanning line Y1. The A power supply line control signal SCn for turning on the drive voltage transistor QDD is supplied from the power supply line control circuit 15 through the potential control line Lo.

  As a result, in the red pixel circuit 20R arranged in the extending direction of the first scanning line Y1, the first and second switching transistors Qs1, Qs2 connected to the first scanning line Y1 are turned on, respectively. At the same time, the potential of the second electrode E2 of the red organic EL element 21 becomes the drive voltage Vdd.

  In this state, the data current Idata is supplied from the data line Xm to the holding capacitor Co through the first switching transistor Qs1 and the second switching transistor Qs2. As a result, the voltage Vo corresponding to the amount of charge corresponding to the current level of the data current IdataM is held in the holding capacitor Co.

  Subsequently, the first scanning signal SY1 for turning off the first and second switching transistors Qs1 and Qs2 of the red pixel circuit 20R is supplied from the scanning line driving circuit 13 via the first scanning line Y1. Is done. A power supply line control signal SCn for turning on the cathode voltage transistor Qo is supplied from the power supply line control circuit 15 through the potential control line Lo.

  As a result, the first and second switching transistors Qs1 and Qs2 connected to the first scanning line Y1 in the red pixel circuit 20R are turned off and the second organic EL element 21 for red is turned off. The potential of the electrode E2 becomes the cathode voltage Vo. Accordingly, since a forward bias is supplied to the red organic EL element 21, the drive current Iel is supplied to the red organic EL element 21, and light emission of the red organic EL element 21 starts.

  Subsequently, the first scanning signal SY1 for turning on the first and second switching transistors Qs1 and Qs2 of the green pixel circuit 20G is supplied from the scanning line driving circuit 13 via the second scanning line Y2. Is done. A power supply line control signal SCn for turning on the drive voltage transistor QDD is supplied from the power supply line control circuit 15 through the potential control line Lo.

  As a result, in the green pixel circuit 20G arranged in the extending direction of the second scanning line Y2, the first and second switching transistors Qs1, Qs2 connected to the second scanning line Y2 are turned on. At the same time, the potential of the second electrode E2 of the green organic EL element 21 becomes the drive voltage Vdd. In this state, the data current Idata is supplied from the data line Xm to the holding capacitor Co through the first switching transistor Qs1 and the second switching transistor Qs2. As a result, the voltage Vo corresponding to the amount of charge corresponding to the current level of the data current IdataM is held in the holding capacitor Co.

  Subsequently, the second scanning signal SY2 for turning off the first and second switching transistors Qs1 and Qs2 of the green pixel circuit 20G is supplied from the scanning line driving circuit 13 via the second scanning line Y2. Is done. A power supply line control signal SCn for turning on the drive voltage transistor QDD is supplied from the power supply line control circuit 15 through the potential control line Lo.

  As a result, the first and second switching transistors Qs1 and Qs2 connected to the second scanning line Y2 in the green pixel circuit 20G are turned off and the second organic EL element 21 in the green state is turned off. The potential of the electrode E2 becomes the cathode voltage Vo. Therefore, since the forward bias is supplied to the green organic EL element 21, the drive current Iel is supplied to the green organic EL element 21, and the green organic EL element 21 starts to emit light.

  Further, a third scanning signal SY3 for turning on the first and second switching transistors Qs1 and Qs2 of the blue pixel circuit 20B is supplied from the scanning line driving circuit 13 via the third scanning line Y3. The A power supply line control signal SCn for turning on the cathode voltage transistor Qo is supplied from the power supply line control circuit 15 through the potential control line Lo.

  As a result, in the blue pixel circuit 20B arranged in the extending direction of the third scanning line Y3, the first and second switching transistors Qs1, Qs2 connected to the third scanning line Y3 are turned on, respectively. At the same time, the potential of the second electrode E2 of the blue organic EL element 21 becomes the drive voltage Vdd. In this state, the data current Idata is supplied from the data line Xm to the holding capacitor Co through the first switching transistor Qs1 and the second switching transistor Qs2. As a result, the voltage Vo corresponding to the amount of charge corresponding to the current level of the data current IdataM is held in the holding capacitor Co.

  Subsequently, a third scanning signal for turning off the first and second switching transistors Qs1 and Qs2 of the blue pixel circuit 20B is supplied from the scanning line driving circuit 13 via the third scanning line Y3. The A power supply line control signal SCn for turning on the drive voltage transistor QDD is supplied from the power supply line control circuit 15 through the potential control line Lo.

  As a result, the first and second switching transistors Qs1 and Qs2 connected to the third scanning line Y3 in the blue pixel circuit 20G are turned off and the second organic EL element 21 for blue is turned off. The potential of the electrode E2 becomes the cathode voltage Vo. Therefore, since the forward bias is supplied to the blue organic EL element 21, the drive current Iel is supplied to the blue organic EL element 21, and the blue organic EL element 21 starts to emit light.

Therefore, the organic EL display 10 can achieve the same effects as those of the first embodiment.
[Third embodiment]
Next, application of the electronic apparatus of the organic EL display 10 as the electro-optical device described in the first and second embodiments will be described with reference to FIG. The organic EL display 10 can be applied to various electronic devices such as a mobile personal computer, a mobile phone, and a digital camera.

FIG. 6 is a perspective view showing the configuration of the mobile personal computer. In FIG. 6, a personal computer 70 includes a main body 72 having a keyboard 71 and a display unit 73 using the organic EL display 10.
Even in this case, the display unit 73 using the organic EL display 10 exhibits the same effect as the first embodiment. As a result, it is possible to provide the mobile personal computer 70 including the organic EL display 10 that can control the luminance gradation of the organic EL element 21 with high accuracy and improve the yield and the aperture ratio.

  In addition, embodiment of invention is not limited to the said embodiment, You may implement as follows.

  In the above embodiment, the potential supplied to the second electrode E2 of the organic EL element 21 is the drive voltage Vdd so that the organic EL element 21 does not exhibit its optical function. The organic EL element 21 may be any potential that does not exhibit its optical function. Further, the second electrode E2 may be floating.

  In the above embodiment, a plurality of power supply lines VLd and a plurality of potential control lines Lo are connected to one first voltage supply line La. This is used by providing a plurality of first voltage supply lines La and separating the first voltage supply line La connected to the plurality of power supply lines VLd and the first voltage supply line La connected to the plurality of potential control lines Lo. To do. By doing so, the fluctuation of the potential of the second electrode D2 of the holding capacitor Co due to the power line control signal SCn is reduced, and the luminance of the organic EL element 21 is stably controlled in addition to the effect of the above embodiment. can do.

  In the above embodiment, one control circuit TS is shared by a plurality of pixel circuits 20 provided along one scanning line Yn. Alternatively, a single control circuit TS may be shared by a plurality of pixel circuits 20 provided along one data line Xm (or a certain number of data lines combined together). At this time, the data current Idata is supplied to the pixel circuit 20 provided along the data line Xm in a state where the drive voltage transistor QDD constituting the control circuit TS is turned on, and then the control circuit TS is configured. The cathode voltage transistors Qo are turned on so that the organic EL elements 21 of the pixel circuits 20 emit light all at once.

  Alternatively, the control circuit TS may be shared by a plurality of pixel circuits 20 provided for a plurality of scanning lines.

  By doing in this way, the effect similar to the said embodiment can be acquired.

  In the above embodiment, the source of the driving voltage transistor QDD is connected to the first voltage supply line that supplies the driving voltage Vdd. If the optical function of the organic EL element 21 is not developed, the second voltage of the organic EL element 21 is supplied to the second electrode E2 of the organic EL element 21 by supplying the drive voltage Vdd via the first voltage supply line. The potential of the electrode E2 was set to the same potential as that of the first electrode E1, and as a result, the drive current Iel did not flow through the organic EL element 21.

  This is connected to the source of the drive voltage transistor QDD to a voltage supply line for supplying a voltage equal to or higher than the drive voltage Vdd. In order not to develop the optical function of the organic EL element 21, the organic EL element 21 is supplied to the second electrode E2 of the organic EL element 21 by supplying a potential equal to or higher than the drive voltage Vdd via the voltage supply line. The potential of the second electrode E2 may be made higher than that of the first electrode E1 so that the drive current Iel does not flow through the organic EL element 21. By doing in this way, the effect similar to the said embodiment can be acquired.

  In the above embodiment, the conductivity type of the driving transistor Qd of the pixel circuit 20 is p-type (p-channel). In addition, the conductivity type of each of the first switching transistor Qs1 and the second switching transistor Qs2 is set to be n-type (n-channel). Then, the drain of the driving transistor Qd was connected to the anode of the organic EL element, and the second electrode E2 of the organic EL element was connected to the potential control line Lo.

  Alternatively, the driving transistor Qd may be n-type, and the conductivity types of the first switching transistor Qs1 and the second switching transistor Qs2 may be set to be p-type (p-channel).

  At this time, the source of the driving transistor Qd arranged as described above may be connected to the cathode of the organic EL element, and the anode of the organic EL element may be connected to the cathode of the organic EL element to the potential control line Lo. . By configuring the pixel circuit 20 in this way, each pixel circuit 20 can be applied to a pixel circuit of a top emission type electro-optical device.

  In the above embodiment, the gate of the first switching transistor Qs1 is connected to the gate of the second switching transistor Qs2 and to the scanning line Yn. Alternatively, the gate of the first switching transistor Qs1 and the gate of the second switching transistor Qs2 may be connected to independent scanning lines.

  In the above embodiment, the control circuit TS is composed of the drive voltage transistor QDD and the cathode voltage transistor Qo. Instead of the driving voltage transistor QDD and the cathode voltage transistor Qo, the control circuit TS may be configured by a switch that can be switched between a low potential and a high potential.

  Further, a voltage follower circuit including a buffer circuit or a source follower circuit may be used in order to improve the drive capability of the drive voltage transistor QDD and the cathode voltage transistor Qo. By doing in this way, the effect similar to the said embodiment can be acquired.

  In the above embodiment, a non-forward bias or a reverse bias is applied to the organic EL element 21 which is an electronic element at the time of data writing. For example, in order to extend the life of the organic EL element 21, other than at the time of data writing It is also possible to set a period for applying non-forward bias or reverse bias.

  In the above embodiment, the first and second voltage supply lines La and Lb are provided on the right end side of the display panel unit 12, but the present invention is not limited to this. For example, on the left end side of the display panel unit 12 It may be provided. By doing in this way, the effect similar to the said embodiment can be acquired.

  In the above-described embodiment, the pixel circuit 20 is embodied as a unit circuit, and a suitable effect is obtained. . The present invention may be embodied in a storage device such as a RAM (particularly MRAM).

  In the above embodiment, the organic EL element 21 is embodied as the current driving element of the pixel circuit 20, but may be embodied in an inorganic EL element. That is, you may apply to the inorganic EL display which consists of an inorganic EL element.

  The electro-optical device of the present invention is particularly suitable for a display device that requires a high aperture ratio.

It is a block circuit diagram which shows the circuit structure of the organic electroluminescent display of this embodiment. FIG. 3 is a block circuit diagram illustrating an internal configuration of a display panel unit and a data line driving circuit according to the first embodiment. FIG. 2 is a circuit diagram of a pixel circuit according to the first embodiment. 3 is a timing chart for explaining a driving method of the pixel circuit of the first embodiment. It is a block circuit diagram which shows the internal structure of the display panel part and data line drive circuit of 2nd Embodiment. It is a perspective view which shows the structure of the mobile type personal computer for demonstrating 3rd Embodiment.

Explanation of symbols

Co Holding capacitor as capacitive element Qs1 First switching transistor as second transistor Qs2 Second switching transistor as third transistor Qd Driving transistor as first transistor Qo As fourth transistor Cathode voltage transistor Lo potential control line TS control circuit Xm data line Yn scanning line 10 organic EL display as electro-optical device 20 pixel circuit as unit circuit 21 organic EL element as electronic element, electro-optical element or current driving element 70 Personal computers as electronic devices

Claims (15)

A plurality of first signal lines;
A plurality of second signal lines;
A plurality of unit circuits;
A first drive circuit for driving the plurality of first signal lines;
A second drive circuit for driving the plurality of second signal lines,
Each of the plurality of unit circuits is
An electronic element;
A first transistor connected to the electronic element and having a first control terminal;
The plurality of second signals are connected to the first transistor and turned on in response to a control signal supplied from one first signal line among the plurality of first signal lines. A second transistor electrically connecting one second signal line of the lines and the first transistor;
A capacitance element that holds a charge amount according to a current signal supplied from the one second signal line and determines a conduction state of the first transistor;
The second drive circuit comprises an IC chip;
An electronic device characterized by the above. A plurality of first signal lines;
A plurality of second signal lines;
A plurality of unit circuits;
A first drive circuit for driving the plurality of first signal lines;
A second drive circuit for driving the plurality of second signal lines,
Each of the plurality of unit circuits is
An electronic element;
A first transistor connected to the electronic element and having a first control terminal;
The plurality of second signals are connected to the first transistor and turned on in response to a control signal supplied from one first signal line among the plurality of first signal lines. A second transistor electrically connecting one second signal line of the lines and the first transistor;
A voltage of the first control terminal is set by a data current passing through the second transistor;
The second drive circuit comprises an IC chip;
An electronic device characterized by the above. A plurality of first signal lines;
A plurality of second signal lines;
Multiple power lines,
A plurality of unit circuits;
A first drive circuit for driving the plurality of first signal lines;
A second drive circuit for driving the plurality of second signal lines;
A signal generation circuit for generating a first control signal for controlling the first drive circuit and generating a second control signal for controlling the second drive circuit;
A power line control circuit for generating a control signal for controlling the plurality of power lines,
Each of the plurality of unit circuits is
An electronic element;
A first transistor connected to the electronic element and having a first control terminal;
The plurality of second signals are connected to the first transistor and turned on in response to a control signal supplied from one first signal line among the plurality of first signal lines. A second transistor that electrically connects one second signal line of the lines and the first transistor;
A capacitance element that holds a charge amount according to a current signal supplied from the one second signal line and determines a conduction state of the first transistor;
At least a part of the first drive circuit, the second drive circuit, the signal generation circuit, and the power line control circuit is configured by an IC chip;
An electronic device characterized by the above. A plurality of first signal lines;
A plurality of second signal lines;
Multiple power lines,
A plurality of unit circuits;
A first drive circuit for driving the plurality of first signal lines;
A second drive circuit for driving the plurality of second signal lines;
A signal generation circuit for generating a first control signal for controlling the first drive circuit and generating a second control signal for controlling the second drive circuit;
Each of the plurality of unit circuits is
An electronic element;
A first transistor connected to the electronic element and having a first control terminal;
The plurality of second signals are connected to the first transistor and turned on in response to a control signal supplied from one first signal line among the plurality of first signal lines. A second transistor electrically connecting one second signal line of the lines and the first transistor;
A capacitance element that holds a charge amount according to a current signal supplied from the one second signal line and determines a conduction state of the first transistor;
At least a part of the first drive circuit, the second drive circuit, and the signal generation circuit is configured by an IC chip;
An electronic device characterized by the above. A plurality of first signal lines;
A plurality of second signal lines;
A plurality of unit circuits;
A first drive circuit for driving the plurality of first signal lines;
A second drive circuit for driving the plurality of second signal lines,
Each of the plurality of unit circuits is
An electronic element;
A first transistor connected to the electronic element and having a first control terminal;
The plurality of second signals are connected to the first transistor and turned on in response to a control signal supplied from one first signal line among the plurality of first signal lines. A second transistor electrically connecting one second signal line of the lines and the first transistor;
A voltage of the first control terminal is set by a data current passing through the second transistor;
The second driving circuit is constituted by a semiconductor integrated circuit device;
An electronic device characterized by the above. A plurality of first signal lines;
A plurality of second signal lines;
Multiple power lines,
A plurality of unit circuits;
A first drive circuit for driving the plurality of first signal lines;
A second drive circuit for driving the plurality of second signal lines;
A signal generation circuit for generating a first control signal for controlling the first drive circuit and generating a second control signal for controlling the second drive circuit;
A power line control circuit for generating a control signal for controlling the plurality of power lines,
Each of the plurality of unit circuits is
An electronic element;
A first transistor connected to the electronic element;
The plurality of second signals are connected to the first transistor and turned on in response to a control signal supplied from one first signal line among the plurality of first signal lines. A second transistor electrically connecting one second signal line of the lines and the first transistor;
A capacitance element that holds a charge amount according to a current signal supplied from the one second signal line and determines a conduction state of the first transistor;
At least a part of the first drive circuit, the second drive circuit, the signal generation circuit, and the power line control circuit is configured by a programmable IC chip;
An electronic device characterized by the above. The electronic device according to claim 1,
The electronic element is in a non-forward bias or reverse bias state for at least a period in which the second transistor is on;
An electronic device characterized by the above. The electronic device according to claim 2.
The data current passes through the second transistor in a first period, and the electronic element is in a non-forward bias state or a reverse bias state in the first period;
An electronic device characterized by the above. The electronic device according to claim 1,
During a period in which a current flows through a first current path including the first transistor and the second transistor, the electronic element is in a non-forward bias state or a reverse bias state,
The electronic element is in a forward bias state during a period in which a current flows through a second current path including the first transistor and the electronic element;
An electronic device characterized by the above. The electronic device according to claim 1,
Each of the plurality of unit circuits further includes a third transistor that controls electrical connection between the first terminal of the first transistor and the first control terminal.
An electronic device characterized by the above. The electronic device according to claim 10.
The transistors included in each of the plurality of unit circuits are only the first transistor, the second transistor, and the third transistor.
An electronic device characterized by the above. The electronic device according to any one of claims 1 to 11,
The conduction state of the first transistor corresponds to a current level of a current supplied to the electronic element;
An electronic device characterized by the above. The electronic device according to any one of claims 1 to 11,
A plurality of power supply lines, the plurality of power supply lines intersecting the plurality of second signal lines;
An electronic device characterized by the above. The electronic device according to any one of claims 1 to 13,
The electronic element is an electro-optical element;
The plurality of first signal lines are a plurality of scanning lines;
The plurality of second signal lines are a plurality of data lines;
An electronic device characterized by the above. An electronic apparatus comprising the electronic device according to claim 1.

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