KR102632645B1 - Electro-optical devices, electronic devices and driving methods - Google Patents

Abstract

A pixel circuit advantageous for high-precision pixel layout with a small number of elements is realized. It has a pixel circuit 11 provided corresponding to the relay line 12-2 and the scanning line 16, and a driver circuit for driving the pixel circuit, and the driver circuit includes a first transistor in the light emission period of the light emitting element OLED. (WS), the second transistor AZ2 and the fourth transistor AZ1 are turned on, transitioning to the extinction period, and the first transistor, the second transistor, the third transistor DS and Through the fourth transistor, the extinction power source (Vss) is written to the gate electrode of the driving transistor (Drv), and the third transistor is turned off to correct the threshold voltage of the driving transistor and the voltage of the gate electrode of the driving transistor. It is an electro-optical device configured to drive to a voltage that reflects the threshold voltage.

Description

Electro-optical devices, electronic devices and driving methods

This technology relates to electro-optical devices, electronic devices, and driving methods.

Electro-optical devices that use organic light-emitting diodes (hereinafter referred to as OLEDs (Organic Light Emitting Diodes)) as light-emitting devices are known. In an electro-optical device, a pixel circuit including a light-emitting element, a transistor, etc. is provided at the intersection of a scanning line and a data line, corresponding to the pixel. In a pixel circuit, when a data signal with a potential corresponding to the gray level of the pixel is applied to the gate of the transistor, the transistor supplies a current corresponding to the voltage between the gate and source to the light emitting element, and the light emitting element is converted to a gray level. It emits light with a luminance corresponding to the

If the threshold voltage (appropriately referred to as Vth hereinafter) of the transistor provided in each pixel is disturbed, the current flowing through the light emitting element is disturbed, deteriorating image quality. To prevent deterioration of image quality, it is necessary to compensate for the deviation of Vth. When performing compensation, there is a known method of connecting the drain and gate of the transistor to a data signal supply line provided for each column, and setting the potential to a value corresponding to the threshold voltage of the transistor.

However, since parasitic capacitance is attached to the data signal supply line, the parasitic capacitance is also charged or discharged when the compensation operation is performed. The period of compensation operation becomes longer by the time required to charge or discharge this parasitic capacity. Additionally, if the period of compensation operation is set without considering the time required to charge or discharge the parasitic capacitance, compensation may become insufficient.

Patent Document 1 seeks to speed up the compensation operation that compensates for the deviation of Vth. The configuration described in Patent Document 1 is a circuit structure that connects a plurality of pixels in the V direction and has a “relay line” used to maintain charge when correcting the Vth of each pixel, and aims at high-speed operation.

Patent Document 1: Patent Laid-Open No. 2016-038425

However, the configuration of Patent Document 1 requires six MOSFETs and two capacitors as elements to form one pixel circuit. The configuration had a large number of elements and made high-precision layout difficult.

The purpose of the present technology is to provide an electro-optical device, electronic device, and driving method that can realize high-speed compensation operations for compensating for deviations in the threshold voltage of transistors used to control light emission intensity with a smaller number of elements.

This technology includes a signal line, a relay line, a scanning line, a feed line that supplies power for extinguishing, a transmission capacity connected between the signal line and the relay line, a pixel circuit provided in response to the relay line and the scanning line, and a pixel circuit that drives the pixel circuit. With a driving circuit,

The pixel circuit includes a driving transistor having a gate electrode, a first current stage, and a second current stage, a light-emitting element that emits light with a luminance corresponding to the magnitude of the current supplied through the driving transistor, a relay line, and A first transistor connected between the gate electrode of the driving transistor, the first current end of the driving transistor, a second transistor for conducting the gate electrode of the driving transistor, and between the first current end and one terminal of the light emitting element. It includes a third transistor inserted into and a fourth transistor inserted between the feed line and one terminal of the light emitting element,

The driving circuit turns on the first transistor, the second transistor, and the fourth transistor during the light emission period of the light emitting element, and transitions to the extinction period, and turns on the first transistor, the second transistor, and the third transistor. Through the transistor and the fourth transistor, the power supply for quenching is written to the gate electrode of the driving transistor, and by turning off the third transistor, the threshold voltage of the driving transistor is corrected, and the voltage of the gate electrode of the driving transistor is adjusted to the threshold voltage. It is an electro-optical device configured to be driven with a voltage reflecting .

Additionally, this technology is an electronic device equipped with the electro-optical device described above.

In addition, the present technology includes a signal line, a relay line, a scanning line, a feed line that supplies power for extinguishing, a first capacitor connected between the signal line and the relay line, a pixel circuit provided corresponding to the relay line and the scanning line, and a pixel circuit. Having a driving circuit that drives,

The pixel circuit includes a driving transistor having a gate electrode, a first current stage, and a second current stage, a light emitting element that emits light with a luminance corresponding to the magnitude of the current supplied through the driving transistor, a relay line, and a gate of the driving transistor. A first transistor connected between the electrodes, a second transistor for conducting the first current terminal of the driving transistor and the gate electrode of the driving transistor, and a second transistor inserted between the first current terminal and one terminal of the light emitting element. It includes three transistors and a fourth transistor inserted between the feed line and one terminal of the light emitting element,

The driving circuit turns on the first transistor, the second transistor, and the fourth transistor during the light emission period of the light emitting element, and transitions to the extinction period, and turns on the first transistor, the second transistor, and the third transistor. Through the transistor and the fourth transistor, the power supply for quenching is written to the gate electrode of the driving transistor, and by turning off the third transistor, the threshold voltage of the driving transistor is corrected, and the voltage of the gate electrode of the driving transistor is adjusted to the threshold voltage. This is a driving method of an electro-optical device that is driven to a voltage that reflects .

According to at least one embodiment, a pixel circuit capable of threshold correction can be realized with a smaller number of elements. Additionally, the effects described here are not necessarily limited, and may be any of the effects described in the present technology or effects that are different from those described in the present technology. In addition, the content of the present technology is not to be construed as limited by the effects illustrated in the following description.

1 is a connection diagram of one embodiment of a pixel circuit according to the present technology.
FIG. 2 is a timing chart for explaining the configuration of FIG. 1.
3 is a connection diagram of an example of a conventional pixel circuit.
4 is a timing chart for explaining a conventional pixel circuit.

The embodiment described below is a suitable specific example of the present technology, and various technologically desirable limitations are attached. However, the scope of the present technology is not limited to these embodiments in the following description, unless specifically stated to the effect of limiting the technology.

In addition, the description of the present technology is made according to the order described below.

<1. Conventional configuration>

<2. One embodiment of the present technology>

<3. Variation example>

<4. Application example>

<1. Conventional configuration>

Prior to explaining one embodiment of the present technology, the conventional configuration described in Patent Document 1 will be described. FIG. 3 shows a conventional pixel circuit, and FIG. 4 is a timing chart showing its operation. Although not shown, the electro-optical device includes a display panel and a control circuit that controls the operation of the display panel. A display panel includes a plurality of pixel circuits and a driver circuit that drives the pixel circuits. A plurality of pixel circuits and a drive circuit included in the display panel are formed on a silicon substrate, and OLED, an example of a light emitting element, is used for the pixel circuit.

The control circuit is supplied in synchronization with a digital image data synchronization signal. Image data is data that specifies the gradation level of a pixel of an image to be displayed on a display panel, for example, in 8 bits. Additionally, the synchronization signal is a signal including a vertical synchronization signal, a horizontal synchronization signal, and a dot clock signal. The control circuit generates various control signals based on the synchronization signal and supplies them to the display panel. Additionally, the control circuit includes a voltage generation circuit. The voltage generation circuit supplies various potentials to the display panel. Additionally, the control circuit generates an analog image signal based on the image data.

The display panel includes a display unit and a driving circuit that drives the display unit. In the display unit, pixel circuits corresponding to pixels of an image to be displayed are arranged in a matrix. That is, in the display unit, M rows of scanning lines are provided serially in the horizontal direction (X direction) in the drawing, and (3N) columns of signal lines grouped in every three columns are serially arranged in the vertical direction (Y direction) in the drawing. , It is provided by maintaining insulation from each scanning line and each other. The pixel circuits are arranged in a matrix of M rows vertically and (3N) columns horizontally.

Each pixel circuit has the same configuration. The pixel circuit 11 will be described with reference to FIG. 3 . One electrode of the transfer capacitor (first capacitance) Cs2 and one of the source and drain of the fifth transistor AZ3 are connected to the signal line 12-1. Additionally, the other electrode of the transfer capacitance Cs2 and the other source and drain of the fifth transistor AZ3 are connected to the relay line 12-2. That is, the transfer capacitance Cs2 and the fifth transistor AZ3 are connected in parallel between the signal line 12-1 and the relay line 12-2.

Additionally, the pixel circuit 11 is connected to the relay line 12-2. That is, a gray level potential corresponding to the specified gray level is supplied to the pixel circuit 11 through the signal line 12-1 and the relay line 12-2.

The pixel capacitance (Cs1) and the transfer capacitance (Cs2) each have two electrodes. The gate of the first transistor WS is connected to the scanning line 16, and one of the source and drain is connected to the relay line 12-2. Additionally, the source or drain of the first transistor WS is connected to the gate of the driving transistor Drv and one electrode of the pixel capacitor Cs1, respectively. That is, the first transistor WS is connected between the gate of the driving transistor Drv and the second electrode of the transfer capacitance Cs2. And, the first transistor WS functions as a transistor that controls the connection between the gate of the driving transistor Drv and the second electrode of the transfer capacitor Cs2 connected to the relay line 12-2.

The driving transistor Drv has its source (second current stage) connected to the feed line 15, its drain (first current stage) is one of the source or drain of the second transistor AZ2, and the third It is connected to the source of the transistor (DS). The power supply line 15 is supplied with a potential (VCCP) that is the higher side of the power supply in the pixel circuit 11. A current corresponding to the voltage flows between the gate and source of the driving transistor (Drv).

The second transistor AZ2 functions as a switching transistor that controls the connection between the gate and drain of the driving transistor Drv. The second transistor AZ2 is a transistor for establishing conduction between the gate and drain of the driving transistor Drv through the first transistor WS.

The third transistor DS functions as a switching transistor that controls the connection between the drain of the driving transistor Drv and the anode of the OLED. The gate of the fourth transistor AZ1 is connected to a control line, and a control signal is supplied. Additionally, the drain of the fourth transistor AZ1 is connected to the feed line 13 as a power supply line for extinction and is maintained at the potential for extinction (Vss). The extinction potential (Vss) is a voltage for maintaining the OLED in an extinction state. This fourth transistor AZ1 functions as a switching transistor that controls the connection between the feed line 13 and the anode of the OLED.

A control signal is supplied to the gate of the fifth transistor AZ3. In addition, one of the source and the drain of the fifth transistor AZ3 is connected to the relay line 12-2, and the second electrode of the transfer capacitance Cs2 and the second transistor AZ2 are connected through the relay line 12-2. ) is connected to the other side of the source and drain. Additionally, the source and drain of the fifth transistor AZ3 are connected to the signal line 12-1. This fifth transistor AZ3 mainly functions as a switching transistor that controls the connection between the signal line 12-1 and the relay line 12-2.

As for the pixel capacitance Cs1, one electrode is connected to the gate of the driving transistor Drv, and the other electrode is connected to the power supply line 15 (potential VCCP). The pixel capacitance Cs1 functions as a holding capacitance that maintains the voltage between the gate and source of the driving transistor Drv. Additionally, as the pixel capacitance Cs1, a capacitance parasitic on the gate of the driving transistor Drv may be used, or a capacitance formed by sandwiching and supporting insulating layers in different conductive layers on a silicon substrate may be used.

The anode of OLED is a pixel electrode that is individually provided for each pixel circuit 11. In contrast, the cathode of the OLED is a common electrode commonly provided for all pixel circuits 11, and is held at the potential Vcath, which is the low side of the power supply in the pixel circuit 11. OLED is a device in which a white organic EL layer is sandwiched between an anode and a light-transmitting cathode supported on a silicon substrate. And, a color filter corresponding to one of RGB is overlapped on the emission side (cathode side) of the OLED.

In such an OLED, when a current flows from the anode to the cathode, holes injected from the anode and electrons injected from the cathode recombine in the organic EL layer to generate excitons and generate white light. The white light generated at this time passes through the cathode on the opposite side to the silicon substrate (anode) and is visible to the observer through coloring by a color filter.

An outline of the operation of a conventional pixel circuit will be described with reference to the driving timing chart in FIG. 4. 1The horizontal scanning period is divided into a light emission period, an extinction period, an initialization period, a Vth correction period, and a signal recording period. In terms of time, the cycle of light emission period → extinction period → initialization period → Vth correction period → recording period → light emission period is repeated. FIG. 4 shows the on/off states of the transistors constituting the pixel circuit 11. The high level indicates the off state of the transistor, and the low level indicates the on state of the transistor. Additionally, Gate represents the gate potential of the driving transistor (Drv).

In the light emission period, the third transistor DS is turned on and the transistors WS, AZ2, AZ1, and AZ3 are turned off. Thereby, the driving transistor Drv supplies a driving current corresponding to the voltage maintained by the pixel capacitance Cs1, that is, the voltage between the gate and the source, to the OLED. A current corresponding to the gray level potential corresponding to the specified gray level of each pixel is supplied to the OLED by the driving transistor Drv, and the OLED emits light with a luminance corresponding to the current. Here, in the light emission period, the transistor OFS is turned off and the transmission gate 42 is turned off.

From the light emission period, the transistor DS turns off and the transistor AZ1 turns on, transitioning to the extinction period. As a result, the path of the current supplied to the OLED is blocked, so the OLED is in an extinguished state.

In the subsequent initialization period, the transistor OFS, transistor WS, and transistor AZ3 connected to the signal line 12-1 are turned on, and the Vth correction reference voltage (Vofs) is applied to the signal line 12-1. Record and perform an initialization operation. At the same time, since the fifth transistor AZ3 is turned on, the signal line 12-1 and the relay line 12-2 are connected, and the second electrode of the transfer capacitor Cs2 is also set to the initial potential. Thereby, the transmission capacity (Cs2) is initialized.

After the above-mentioned initialization period ends, the Vth correction period begins. In the Vth correction period, the transistors (WS, AZ2, AZ1) are turned on, and the third transistors (DS, AZ3) are turned off. At this time, the gate of the driving transistor Drv is connected to its drain through the first transistor WS and the second transistor AZ2, and a drain current flows through the driving transistor Drv to charge the gate. That is, the drain and gate of the driving transistor Drv are connected to the relay line 12-2, and if the threshold voltage of the driving transistor Drv is Vth, the potential Vg of the gate of the driving transistor Drv is: It converges to (VCCP-Vth), and Vth correction is completed.

Here, in the Vth correction period, the transistor OFS is turned on and the transmission gate 14 is turned off. At this time, since the relay line 12-2 is short, the time required to charge or discharge the parasitic capacitance accompanying the relay line 12-2 is shortened, and the Vth correction period itself is shortened.

Additionally, since the third transistor DS is off, the drain of the driving transistor Drv is not electrically connected to the OLED. Additionally, as in the initialization period, when the fourth transistor AZ1 turns on, the anode of the OLED and the feed line 13 are connected, and the potential of the anode is set to the potential for extinction (Vss).

Upon completion of the above-mentioned Vth correction period, the recording period begins. In the writing period, in the pixel circuit 11, the transistors WS and AZ1 are turned on, while the transistors AZ2, DS, and AZ3 are turned off. In the writing period, the transistor OFS is turned off and the transmission gate 14 is turned on. For this reason, the gray level potential is supplied to one electrode of the transfer capacitance Cs2. Then, a signal whose gray level potential is level shifted is supplied to the gate of the driving transistor Drv and written into the pixel capacitance Cs1.

Additionally, since the third transistor DS is off, the drain of the driving transistor Drv is not electrically connected to the OLED. Additionally, as in the initialization period, when the fourth transistor AZ1 turns on, the anode of the OLED and the feed line 13 are connected, and the potential of the anode is initialized to the potential for extinction (Vss). Then, it transitions to the above-mentioned light emission period.

<2. One embodiment of the present technology>

In the conventional pixel circuit 11 described above, Vth correction operation is performed with the first transistor WS turned on. Therefore, the Vth correction voltage is recorded not only in the pixel capacitance Cs1 but also in the parasitic capacitance Cp of the relay line 12-2. This relay line 12-2 is configured to be shared by a plurality of pixels, and the capacitance value changes depending on the number of shared pixels. If the number of shared pixels is reduced, the capacity value becomes smaller, the Vth correction speed can be faster, and operation is advantageous for high-speed operation. On the other hand, it has the disadvantage of requiring a total of 8 elements for the number of transistors and capacitance elements, which has the disadvantage of having a large number of elements and hindering high-precision layout.

This technology provides a pixel circuit that reduces the number of elements while maintaining the functions of the pixel circuit. 1 is a circuit diagram of one embodiment of the present technology. One embodiment has a configuration in which the fifth transistor AZ3 is deleted from the circuit configuration in FIG. 3 . Additionally, a predetermined voltage (rst) is applied to the signal line 12-1 through a transistor (RST). A control signal is supplied to the gate of the transistor (RST).

Figure 2 shows the drive timing of one embodiment of the present technology. In the light emission period, the third transistor DS is turned on and the transistors WS, AZ1, and AZ2 are turned off. Thereby, the driving transistor Drv supplies a driving current corresponding to the voltage maintained by the pixel capacitance Cs1, that is, the voltage between the gate and the source, to the OLED. A current corresponding to the gray level potential corresponding to the specified gray level of each pixel is supplied to the OLED by the driving transistor Drv, and the OLED emits light with a luminance corresponding to the current. Here, in the light emission period, the transistor RST is turned off and the transmission gate 42 is turned off.

In the light emission period, the first transistor WS, fourth transistor AZ1, second transistor AZ2, and transistor RST are turned on and transition to an extinguished state. At the same time, in order to prepare for Vth correction, the extinction potential (Vss) of the feed line 13 is recorded through the transistor AZ2, transistor DS, and transistor AZ1.

Here, the extinction potential (Vss) is set to a voltage setting that turns on the driving transistor (Drv) when preparing for Vth correction while extinguishing the OLED.

Here, the voltage for turning on the transistors (AZ1, AZ2, and DS) is expressed as V_Low, and the threshold voltage of the transistors (AZ1, AZ2, and DS) is expressed as Vth(AZ1)=Vth(AZ2)=Vth(DS)=Vth. Then, the gate voltage (Vg) of the driving transistor (Drv) is expressed by the following equation.

When Vss<|Vth|+V_Low, Vg=|Vth|+V_Low

When Vss≥|Vth|+V_Low, Vg=Vss

After that, the Vth correction period starts by turning off the third transistor DS. When the third transistor DS is turned off, the drain of the driving transistor Drv is not connected to the OLED. The gate of the driving transistor (Drv) converges to (VCCP-Vth) and the Vth correction period is completed.

After the Vth correction period, transition to the recording period. In the writing period, the first transistor WS is on, the third transistor DS is off, the fourth transistor AZ1 is on, and the third transistor AZ3 and the transistor RST are off. When the Vsig voltage transitions from VCCP to (VCCP-Vsig), the gate voltage transitions as expressed by the following equation.

VCCP-Vth-Vdata×Cs2/(Cs1+Cs2)

In this way, the gate voltage of the driving transistor Drv becomes a voltage reflecting Vth, and Vth is canceled when light is emitted. After that, the first transistor WS and the fourth transistor AZ1 turn off, the third transistor DS turns on, and the transition to the light emission period occurs.

As described above, even if the transistor (AZ3) is deleted from the conventional 6-transistor, 2-condenser configuration to create a 5-transistor, 2-condenser configuration, the drive timing is set to record the Vth correction preparation voltage from Vss, just like the conventional configuration. Vth correction operation can be performed. That is, the pixel circuit of the present technology does not record the Vth correction preparation voltage from a signal line when preparing for Vth correction, but uses a power source connected to the anode of the OLED as a light emitting element through a switch transistor. Since the number of elements can be reduced in this way, a pixel circuit advantageous for high-precision pixel layout can be realized.

<3. Variation example>

Although the embodiments of the present technology have been described in detail above, they are not limited to the above-described embodiments, and various modifications are possible based on the technical spirit of the present technology. For example, various modifications as described below are possible. Additionally, the modifications described below may be an appropriate combination of one or more arbitrarily selected elements. In addition, the configuration, method, process, shape, material, and numerical value of the above-described embodiments can be combined with each other as long as they do not deviate from the main point of the present technology.

In the above-described embodiment, the transistors are unified into the P-channel type, but they may be unified into the N-channel type. Additionally, the P-channel type and N-channel type may be appropriately combined.

In the above-described embodiment, OLED, which is a light-emitting element, is exemplified as the electro-optical element. However, for example, an inorganic light-emitting diode or LED (Light Emitting Diode) that emits light with a luminance corresponding to a current may be used.

<4. Application example>

Next, electronic devices to which electro-optical devices are applied, including embodiments and application examples, will be described. Electro-optical devices have small pixels and are suitable for high-precision display purposes. Therefore, as electronic devices, it can be applied to display devices such as head-mounted displays, smart glasses, smartphones, and electronic viewfinders of digital cameras.

Additionally, this technology can also have the following configuration.

(One)

signal line,

relay line,

scan line,

A feeder line that supplies power for extinction,

a transmission capacity connected between the signal line and the relay line,

a pixel circuit provided corresponding to the relay line and the scan line;

Having a driving circuit that drives the pixel circuit,

The pixel circuit is,

A driving transistor having a gate electrode, a first current stage, and a second current stage,

a light-emitting element that emits light with a brightness corresponding to the magnitude of a current supplied through the driving transistor;

a first transistor connected between the relay line and the gate electrode of the driving transistor;

a second transistor for conducting the first current terminal of the driving transistor and the gate electrode of the driving transistor;

a third transistor inserted between the first current terminal and one terminal of the light emitting element;

Comprising a fourth transistor inserted between the feed line and one terminal of the light emitting element,

The driving circuit is,

In the light emission period of the light emitting element, the first transistor, the second transistor, and the fourth transistor are turned on, and the transition to an extinction period occurs, and the first transistor, the second transistor, Writing the quenching power source to the gate electrode of the driving transistor through the third transistor and the fourth transistor,

An electro-optical device configured to correct the threshold voltage of the driving transistor by turning off the third transistor and drive the gate electrode of the driving transistor to a voltage reflecting the threshold voltage.

(2)

The electro-optical device according to (1), wherein the extinction power supply is set to turn on the driving transistor during the extinction period while extinguishing the light-emitting element.

(3)

One electrode is connected to the gate electrode of the driving transistor, the other electrode is connected to a voltage supply line, and has a pixel capacity for maintaining the voltage between the gate and source of the driving transistor. Electro-optical devices.

(4)

An electronic device including the electro-optical device described in (1).

(5)

signal line,

relay line,

scan line,

A feeder line that supplies power for extinction,

a first capacitor connected between the signal line and the relay line;

a pixel circuit provided corresponding to the relay line and the scan line;

Having a driving circuit that drives the pixel circuit,

The pixel circuit is,

A driving transistor having a gate electrode, a first current stage, and a second current stage,

a light-emitting element that emits light with a brightness corresponding to the magnitude of a current supplied through the driving transistor;

a first transistor connected between the relay line and the gate electrode of the driving transistor;

a second transistor for conducting the first current terminal of the driving transistor and the gate electrode of the driving transistor;

a third transistor inserted between the first current terminal and one terminal of the light emitting element;

Comprising a fourth transistor inserted between the feed line and one terminal of the light emitting element,

The driving circuit is,

In the light emission period of the light emitting element, the first transistor, the second transistor, and the fourth transistor are turned on, and the transition to an extinction period occurs, and the first transistor, the second transistor, Writing the quenching power source to the gate electrode of the driving transistor through the third transistor and the fourth transistor,

A method of driving an electro-optical device in which the threshold voltage of the driving transistor is corrected by turning off the third transistor, and the voltage of the gate electrode of the driving transistor is driven to a voltage reflecting the threshold voltage.

(6)

The method of driving an electro-optical device according to (5), wherein the extinction power supply is set to turn on the driving transistor during the extinction period while extinguishing the light-emitting element.

(7)

(5) wherein the pixel circuit has one electrode connected to the gate electrode of the driving transistor, the other electrode connected to a voltage supply line, and a pixel capacitance that maintains a voltage between the gate and source of the driving transistor; or The method of driving the electro-optical device described in (6).

11: Pixel circuit
12-1: Signal line
12-2: relay line
13, 15: feeder line
14: Transmission gate
16: scan line
VCCP: Feeder line
Drv, WS, AZ2, DS, AZ1, AZ3: transistors
Cs1: pixel capacity
Cs2: transmission capacity
Vss: potential for extinction

Claims (7)

signal line,
relay line,
scan line,
A feeder line that supplies power for extinction,
a transmission capacity connected between the signal line and the relay line,
a pixel circuit provided corresponding to the relay line and the scan line;
Having a driving circuit that drives the pixel circuit,
The pixel circuit is,
A driving transistor having a gate electrode, a first current stage, and a second current stage,
a light-emitting element that emits light with a brightness corresponding to the magnitude of a current supplied through the driving transistor;
a first transistor connected between the relay line and the gate electrode of the driving transistor;
a second transistor for conducting the first current terminal of the driving transistor and the gate electrode of the driving transistor;
a third transistor inserted between the first current terminal and one terminal of the light emitting element;
Comprising a fourth transistor inserted between the feed line and one terminal of the light emitting element,
The driving circuit is,
When the light emitting element transitions from the light emission period to the extinction state, the first transistor, the second transistor, and the fourth transistor are turned on to transition to the extinction period, and the first transistor and the fourth transistor are switched on. Writing the quenching power supply to the gate electrode of the driving transistor through the second transistor, the third transistor, and the fourth transistor,
An electro-optical device, characterized in that the electro-optical device is configured to correct the threshold voltage of the driving transistor by turning off the third transistor, and to drive the gate electrode of the driving transistor to a voltage reflecting the threshold voltage. According to paragraph 1,
The electro-optical device, wherein the extinction power source is set to turn on the driving transistor during the extinction period while extinguishing the light-emitting element. According to paragraph 1,
An electro-optical device, characterized in that one electrode is connected to the gate electrode of the driving transistor, and the other electrode is connected to a voltage supply line, and has a pixel capacitance for maintaining the voltage between the gate and source of the driving transistor. An electronic device comprising the electro-optical device according to claim 1. signal line,
relay line,
scan line,
A feeder line that supplies power for extinction,
a first capacitor connected between the signal line and the relay line;
a pixel circuit provided corresponding to the relay line and the scan line;
Having a driving circuit that drives the pixel circuit,
The pixel circuit is,
A driving transistor having a gate electrode, a first current stage, and a second current stage,
a light-emitting element that emits light with a brightness corresponding to the magnitude of a current supplied through the driving transistor;
a first transistor connected between the relay line and the gate electrode of the driving transistor;
a second transistor for conducting the first current terminal of the driving transistor and the gate electrode of the driving transistor;
a third transistor inserted between the first current terminal and one terminal of the light emitting element;
Comprising a fourth transistor inserted between the feed line and one terminal of the light emitting element,
The driving circuit is,
When the light emitting element transitions from the light emission period to the extinction state, the first transistor, the second transistor, and the fourth transistor are turned on to transition to the extinction period, and the first transistor and the fourth transistor are switched on. Writing the quenching power supply to the gate electrode of the driving transistor through the second transistor, the third transistor, and the fourth transistor,
A method of driving an electro-optical device, wherein the threshold voltage of the driving transistor is corrected by turning off the third transistor, and the voltage of the gate electrode of the driving transistor is driven to a voltage reflecting the threshold voltage. According to clause 5,
A method of driving an electro-optical device, wherein the extinction power source is set to turn on the driving transistor during the extinction period while extinguishing the light-emitting element. According to clause 5,
The pixel circuit is characterized in that one electrode is connected to the gate electrode of the driving transistor, the other electrode is connected to a voltage supply line, and has a pixel capacitance that maintains a voltage between the gate and source of the driving transistor. Method of driving an electro-optical device.

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