JP2007219339A - Capacitive display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a capacitive display device with which the application of an overvoltage to a light emitting layer is suppressed. <P>SOLUTION: An inorganic EL display device 1 is equipped with a plurality of scanning side electrode lines X substantially consisting of a transparent conductive oxide, a plurality of data side electrode lines Y, an inorganic EL light emitting layer 13 provided between the scanning side electrode lines X and the data side electrode lines Y, and a scanning side driving circuit 20 for applying pulse voltages of different polarities alternately for every frame to the scanning side electrode lines X and a data side driving circuit 30. The data side driving circuit 30 starts applying the pulse voltages at the timing varying at one or every plurality of the data side electrode lines Y in the non-light emitting frame for applying the pulse voltages of the same polarity as that of the pulse voltages that the scanning side driving circuit 20 applies. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a capacitive display device.

  In recent years, for example, research on capacitive display devices typified by inorganic electroluminescence display devices (hereinafter sometimes referred to as “inorganic EL display devices”) and plasma display devices has been actively conducted.

  In general, a capacitive display device includes a plurality of scanning side electrode lines extending in parallel, a plurality of data side electrode lines extending in parallel in a direction intersecting the scanning side electrode line, a scanning side electrode line, and a data side electrode line. And a light emitting layer provided between the two. Usually, the capacitive display device is driven by applying a modulation voltage corresponding to display data for determining light emission / non-light emission to the data side electrode line while sequentially applying a write voltage to the scanning side electrode line. .

  Examples of the gradation display method of the capacitive display device include a pulse width modulation method described in Patent Document 1 and the like. In this pulse width modulation method, a pulse waveform or a ramp waveform write voltage is applied to the scanning side electrode line, and a pulse width modulation voltage corresponding to the gradation display data is applied to the data side electrode line. By applying the voltage after the start, the time during which the voltage higher than the light emission threshold voltage is applied to the light emitting layer in each light emitting frame is different from each other.

By the way, in recent years, the need for a transparent display device has increased, and both a scanning side electrode line and a data side electrode line are formed of a transparent conductive oxide (for example, ITO) as a capacitive display device. A transparent one has been proposed.
Japanese Patent Laid-Open No. 3-186892

  However, the transparent conductive oxide has a very high electric resistance as compared with metals (aluminum, silver, etc.) conventionally used for forming electrode lines. For this reason, in the capacitive display device in which the scanning-side electrode line is formed of a transparent conductive oxide, the same polarity as the writing voltage is applied after the application of the writing voltage is started as in the pulse width gradation display method described above. When the driving method for applying the modulation voltage is adopted, when the potential of the data side electrode line fluctuates (when charging or discharging occurs), capacitive coupling occurs and the potential of the scanning side electrode line becomes There is a risk of fluctuations. When the potential of the scanning electrode line fluctuates, an overvoltage is applied to the light emitting layer, which may cause element destruction.

  The present invention has been made in view of the above points, and an object thereof is to provide a capacitive display device in which application of an overvoltage to a light emitting layer is suppressed.

In order to achieve the above object, a first capacitive display device according to the present invention comprises:
A plurality of scanning-side electrode lines substantially made of a transparent conductive oxide and extending in parallel;
A plurality of data side electrode lines extending in parallel in a direction intersecting with the plurality of scanning side electrode lines;
A capacitive light emitting layer that is provided between the plurality of scanning side electrode lines and the plurality of data side electrode lines and emits light when a voltage equal to or higher than a light emission threshold voltage is applied;
A scanning side drive circuit that applies pulse voltages having different polarities alternately to the scanning side electrode line for each frame;
In a light emitting frame that emits light from the capacitive light emitting layer, no voltage is applied to the data side electrode line, or a pulse voltage having a polarity opposite to that applied by the scanning side driving circuit after the scanning side driving circuit starts applying the pulse voltage. In the non-light emitting frame in which the capacitive light emitting layer does not emit light while the voltage applied to the capacitive light emitting layer is equal to or higher than the light emitting threshold voltage, no voltage is applied to the data side electrode line or the scanning side Data-side drive circuit that applies a pulse voltage having the same polarity as the voltage applied by the scanning-side drive circuit after the drive circuit starts applying the pulse voltage so that the voltage applied to the capacitive light-emitting layer is less than the light-emission threshold voltage When,
With
The data side drive circuit starts applying the pulse voltage at a different timing for each one or a plurality of data side electrode lines in a non-light emitting frame that applies a pulse voltage having the same polarity as the pulse voltage applied by the scan side drive circuit. It is characterized by being.

In the first capacitive display device according to the present invention, the data side driving circuit has a charging time in the non-light emitting frame to which the pulse voltage having the same polarity as the pulse voltage applied by the scanning side driving circuit is applied. It is preferable that the charging time is longer than that.
A second capacitive display device according to the present invention comprises:
A plurality of scanning-side electrode lines substantially made of a transparent conductive oxide and extending in parallel;
A plurality of data side electrode lines extending in parallel in a direction intersecting with the plurality of scanning side electrode lines;
A capacitive light emitting layer that is provided between the plurality of scanning side electrode lines and the plurality of data side electrode lines and emits light when a voltage equal to or higher than a light emission threshold voltage is applied;
A scanning side drive circuit that applies pulse voltages having different polarities alternately to the scanning side electrode line for each frame;
In a light emitting frame that emits light from the capacitive light emitting layer, a pulse having a polarity opposite to that applied by the scanning side driving circuit without applying a voltage to the data side electrode line or after the scanning side driving circuit starts applying the pulse voltage. While the voltage applied to the capacitive light emitting layer is set to be equal to or higher than the light emitting threshold voltage, scanning is performed without applying a voltage to the data side electrode line or in a non-light emitting frame that does not cause the capacitive light emitting layer to emit light. Data side drive in which the voltage applied to the capacitive light emitting layer is less than the light emission threshold voltage by applying a pulse voltage having the same polarity as the voltage applied by the scanning side drive circuit after the side drive circuit starts applying the pulse voltage Circuit,
With
The data side driving circuit is characterized in that in a non-light emitting frame to which a pulse voltage having the same polarity as the pulse voltage applied by the scanning side driving circuit is applied, the charging time is longer than the charging time of the scanning side driving circuit. .

  In the second capacitive display device according to the present invention, the data side driving circuit includes one or a plurality of data side electrode lines in a non-light emitting frame to which a pulse voltage having the same polarity as the pulse voltage applied by the scanning side driving circuit is applied. It is preferable that the application of the pulse voltage is started at a different timing every time.

  In the first or second capacitive display device according to the present invention, each scanning-side electrode line is substantially made of a transparent conductive oxide (for example, indium tin oxide (ITO), indium zinc oxide (IZO), It is preferably made of tin oxide (SnO) or the like.

  In the first or second capacitive display device according to the present invention, the scanning side drive circuit includes a pulse voltage of one polarity equal to or higher than the light emission threshold voltage of one polarity and the other of the light emission threshold voltages lower than the other polarity. In the light emitting frame in which the scanning side driving circuit applies the pulse voltage of one polarity, the data side driving circuit does not apply the voltage to the data side electrode line, and the data side driving circuit applies the polarity pulse voltage alternately. In the light emitting frame for applying the pulse voltage of the electrode, the data side electrode is applied in the non-light emitting frame in which the scanning side driving circuit applies the pulse voltage of one polarity to the data side electrode line. In a non-light emitting frame in which the pulse voltage of one electrode is applied to the line and the pulse voltage of the other electrode is applied, no voltage is applied to the data side electrode line. It may be.

  In the first or second capacitive display device according to the present invention, the capacitive light emitting layer may be an inorganic electroluminescent light emitting layer.

  According to the present invention, application of overvoltage to the light emitting layer can be suppressed.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, although embodiment of this invention is described here taking an inorganic EL display apparatus as an example, the capacitive display apparatus which concerns on this invention is not limited to an inorganic EL display apparatus. The present invention is suitably applied not only to inorganic EL display devices but also to capacitive display devices such as plasma display devices and liquid crystal display devices in general.

(Embodiment 1)
FIG. 1 is a diagram illustrating a configuration of an inorganic EL display device 1 according to the first embodiment.

  FIG. 2 is a diagram illustrating the configuration of the data side drive circuit 30 in the inorganic EL display device 1.

  FIG. 3 is a partially cutaway perspective view showing the configuration of the inorganic electroluminescence display panel 10.

The inorganic EL display device 1 includes an inorganic electroluminescence display panel (hereinafter sometimes referred to as “inorganic EL display panel”) 10, a scanning side driving circuit 20, a data side driving circuit 30, and a scanning side power supply circuit 41. And a data-side power supply circuit 42. The inorganic EL display panel 10 includes a substrate 11, a plurality of data side electrode lines Y (specifically, j data side electrode lines Y _{1 to} Y _j ), a first dielectric layer 12, and capacitive light emission. Inorganic electroluminescence light-emitting layer (hereinafter sometimes referred to as “inorganic EL light-emitting layer”) 13, second dielectric layer 14, and a plurality of scanning-side electrode lines X (specifically, X _{1 to} X _i scanning electrode lines).

  The plurality of data-side electrode lines Y are formed in a stripe shape on the substrate 11 so as to extend in parallel. The first dielectric layer 12 is formed on the plurality of data side electrode lines Y. An inorganic EL light emitting layer 13 is formed on the first dielectric layer 12. The inorganic EL light emitting layer 13 is a layer that emits light (generates electroluminescence light) when a voltage equal to or higher than a predetermined light emission threshold voltage is applied. The second dielectric layer 14 is formed on the inorganic EL light emitting layer 13. The plurality of scanning side electrode lines X are parallel on the second dielectric layer 14 in a direction intersecting with a direction in which the data side electrode line Y extends (typically, in a direction orthogonal to the data side electrode line Y). It is formed in a stripe shape so as to extend.

  The plurality of scanning-side electrode lines X are substantially made of a transparent conductive oxide. The plurality of data side electrode lines Y may also be substantially made of a transparent conductive oxide. By forming both the scanning-side electrode line X and the data-side electrode line Y with a transparent conductive oxide, the transparent inorganic EL display device 1 can be realized. Specific examples of the transparent conductive oxide include indium tin oxide (ITO), indium zinc oxide (IZO), and tin oxide (SnO).

Each data side electrode line Y _{1 to} Y _j is electrically connected to the data side drive circuit 30. The data side drive circuit 30 is electrically connected to the data side power supply circuit 42. The data side power supply circuit 42 selectively supplies a pulsed modulation voltage of + V ₃ volts to the data side drive circuit 30. The data side driving circuit 30 applies a pulse-like modulation voltage supplied from the data side power supply circuit 42 to each of the plurality of data side electrode lines Y _{1 to} Y _j according to display data.

  As shown in FIG. 2, the data side drive circuit 30 is a drive circuit composed of a push-pull driver IC, and includes a plurality of pull-up switching elements 33, a plurality of pull-down switching elements 34, and these switching elements 33, 34. A logic circuit (shift register latch circuit 31, counter / comparator circuit 32, etc.) for on / off control is included.

On the other hand, each scanning side electrode line X is electrically connected to the scanning side drive circuit 20. The scanning side drive circuit 20 is electrically connected to the scanning side power supply circuit 41. The scanning side power supply circuit 41 selectively supplies a pulsed writing voltage of + V ₁ volt or −V ₂ volt to the scanning side drive circuit 20. The scanning side drive circuit 20 sequentially applies the pulsed writing voltage supplied from the scanning side power supply circuit 41 to the plurality of scanning side electrode lines X _{1 to} X _i so that the polarities are alternately different for each frame. It will be. That is, in each frame, write voltages having the same polarity are sequentially applied to the plurality of scanning-side electrode lines X _{1 to} X _i . Focusing on one scanning-side electrode line X, a pulsed writing voltage having a different polarity is applied every time the frame changes. Specifically, for example, the scanning side drive circuit 20 first sequentially applies a writing voltage of + V ₁ to the plurality of scanning side electrode lines X _{1 to} X _i . In the next frame, a write voltage of −V ₂ is sequentially applied to the plurality of scanning-side electrode lines X _{1 to} X _i . A step of sequentially applying the plurality of write voltage of the scanning electrode lines X ₁ to X _i to + V _1, by sequentially applying a write voltage -V ₂ to a plurality of scanning electrode lines X ₁ to X _i The process is repeated alternately.

In this embodiment, it is assumed that | + V ₁ | is larger than | −V ₂ | and satisfies the following mathematical formula.

| + V ₁ |> V _th
｜ −V ₂ ｜ ＞ V _th
| V ₁ −V ₃ | <V _th
| V ₂ + V ₃ |> V _th
Here, V _th is the absolute value of the light emission threshold voltage.

  Next, an outline of a driving method in the inorganic EL display device 1 according to the present embodiment will be described with reference to FIG. The driving method described here is merely an example, and the capacitive display device according to the present invention is not limited to the driving method described below.

  FIG. 4 is a diagram for explaining an outline of a driving method in the inorganic EL display device 1.

First, a light emitting frame that emits light from the inorganic EL light emitting layer 13 will be described with reference to FIG. In the light emission frame (light emission frame pattern 1 in FIG. 4) in which the scanning side drive circuit 20 applies a writing voltage of + V ₁ to the scanning side electrode line X, the data side drive circuit 30 applies a voltage to the data side electrode line Y. do not do. For this reason, the voltage applied to the inorganic EL light emitting layer 13 is + V ₁ . Here, as described above, since | + V ₁ |> V _th , electroluminescence light is emitted from the inorganic EL light emitting layer 13.

In the light emission frame (light emission frame pattern 2 in FIG. 4) in which the scanning side drive circuit 20 applies a writing voltage of −V _{2 to} the scanning side electrode line X, the data side driving circuit 30 is connected to the data side electrode line Y. A modulation voltage of + V _{3 having} a polarity opposite to the voltage (−V ₂ ) applied to the scanning electrode line X by the scanning side drive circuit 20 is applied. For this reason, the voltage applied to the inorganic EL light emitting layer 13 is −V ₂ −V ₃ . Here, as described above, since | V ₂ + V ₃ |> V _th , the electroluminescence light is emitted from the inorganic EL light emitting layer 13.

Next, the non-light emitting frame will be described. In the non-light emitting frame (non-light emitting frame pattern 1 in FIG. 4) in which the scanning side driving circuit 20 applies the writing voltage of + V ₁ to the scanning side electrode line X, the data side driving circuit 30 is connected to the data side electrode line Y. The scanning side drive circuit 20 applies a + V ₃ modulation voltage having the same polarity as the voltage (+ V ₁ ) applied to the scanning side electrode line X. For this reason, the voltage applied to the inorganic EL light emitting layer 13 is V ₁ −V ₃ . Here, as described above, since | V ₁ −V ₃ | <V _th , the inorganic EL light emitting layer 13 does not emit light.

In the non-light emitting frame (non-light emitting frame pattern 2 in FIG. 4) in which the scanning side driving circuit 20 applies the write voltage of −V _{2 to} the scanning side electrode line X, the data side driving circuit 30 is connected to the data side electrode line Y. Do not apply voltage. For this reason, the voltage applied to the inorganic EL light emitting layer 13 is −V ₂ . Here, as described above, since | −V ₂ |> V _th , the inorganic EL light emitting layer 13 does not emit light.

  The inorganic EL display device 1 displays an image or the like by combining the four patterns described above.

Specifically, in the first embodiment, the scanning side drive circuit 20 applies the write voltage + V ₁ to the scanning side electrode line X, and the data side driving circuit 30 applies to the data side electrode line Y and the scanning side electrode line X. In a non-light emitting frame (a frame indicated by a non-light emitting frame pattern 1 in FIG. 4) to which a modulation voltage (+ V ₃ ) having the same polarity as the applied write voltage (+ V ₁ ) is applied, the data side driving circuit 30 After the drive circuit 20 starts applying the pulsed write voltage + V _{1 to} the scanning side electrode line X, application of the modulation voltage is started. In addition, the data side driving circuit 30 starts applying modulation at a different timing for each of one or a plurality of data side electrode lines. Specifically, in the first embodiment, the data side drive circuit 30 includes a data side electrode line Y (data side electrode lines Y _{1 to} Y _{(j / 2)} ) located in the right half in FIG. Application of the modulation voltage is started at different timings to the data side electrode line Y (data side electrode lines Y _{(j / 2-1} ) to Y _j ) located in the left half. The present invention is not limited to this driving method. For example, the data side driving circuit 30 may start applying a modulation voltage at a different timing for each data side electrode line Y. Further, in FIG. 1, the data side electrode line Y located at the right side 1/3, the data side electrode line Y located at the center 1/3, and the data side electrode line Y located at the left side 1/3 are different from each other. The application of the modulation voltage may be started at the timing.

  Hereinafter, the operation of the data side driving circuit 30 in the non-light emitting frame pattern 1 will be described in detail with reference to FIG.

FIG. 5 is a graph for explaining the operation of the data side driving circuit 30 in the non-light emitting frame pattern 1. 5 to 7, a line indicated by “A” represents a writing voltage applied to the scanning side electrode line X by the scanning side driving circuit 20. A line indicated by “B” represents a modulation voltage applied to the data side electrode line Y by the data side driving circuit 30. Specifically, the line indicated by “B1” represents the modulation voltage applied by the data side drive circuit 30 to the data side electrode lines Y _{1 to} Y _{(j / 2)} . Line indicated by "B1" represents the modulation voltage data side driving circuit 30 is applied to the data side electrode lines _{Y (j / 2-1) ~Y j} . A line indicated by “C” indicates that the pixel constituted by the scanning side electrode line X _i and the data side electrode lines Y _{2 to} Y _j is the non-light emitting frame pattern 1 (that is, the writing voltage is applied to the scanning side electrode line X _i. + V ₁ is applied, and the modulation voltage + V ₃ is applied to the data side electrode lines Y _{2 to} Y _j ), and only the pixel constituted by the scanning side electrode line X _i and the data side electrode line Y ₁ The potential fluctuation of the scanning electrode line X _{i in} the case of the pattern 1 (that is, the writing voltage + V ₁ is applied to the scanning electrode line X _i and no voltage is applied to the data electrode lines Y _{2 to} Y _j ). To express.

As shown in FIG. 5, in a certain non-light emitting frame pattern 1, the scanning side drive circuit 20 starts applying a writing voltage of + V ₁ to the scanning side electrode line X from time t ₁ . Delayed from time t ₁ , from time t ₂ , the data side drive circuit 30 starts applying a modulation voltage of + V _{3 to} the data side electrode lines Y _{1 to} Y _{(j / 2)} . Delayed addition time t _2, the time t _3, the data-side driving circuit 30 starts the application of the data-side electrode lines Y _{(j / 2-1)} modulation voltage of the ~Y _j + V _3.

Since the inorganic EL display device 1 according to the first embodiment is such a driving method, element destruction is unlikely to occur, and high-quality image display is possible. In order to further explain this effect, first, with reference to FIG. 6, in the non-light emitting frame pattern 1, all of the scanning side driving circuit 20 is delayed after applying the voltage + V ₁ to the scanning side electrode line X. A case of a conventional inorganic EL display device in which the voltage + V ₃ is simultaneously applied to the data side electrode line Y will be described.

  FIG. 6 is a graph showing the potential change of the scanning electrode line X in the non-light emitting frame pattern 1 in the conventional inorganic EL display device.

As shown in FIG. 6, in the conventional inorganic EL display device, for example, a pixel constituted by the scanning electrode line X _i and the data side electrode lines Y _{2 to} Y _j is the non-light emitting frame pattern 1 (that is, scanning). The write voltage + V ₁ is applied to the side electrode line X _i , and the modulation voltage + V ₃ is applied to the data side electrode lines Y _{2 to} Y _j ), and the scanning electrode line X _i and the data side electrode line Y ₁ are configured. When only the pixel to be processed is the light emission frame pattern 1 (that is, the writing voltage + V ₁ is applied to the scanning electrode line X _i and the voltage is not applied only to the data electrode line Y ₁ ), the scanning electrode line A large (ΔV) overvoltage is applied to X _i . When the magnitude of the overvoltage ΔV is large and (+ V ₁ + ΔV−V ₃ ) becomes larger than V _th , the inorganic EL light emitting layer 13 to be made non-light emitting also has a voltage higher than the light emitting threshold voltage. Is applied, resulting in light emission. Further, when ΔV is large, there is a risk of element destruction.

In contrast, in the inorganic EL display device 1 according to the first embodiment, as described above, the timing (t ₂ ) at which application of the modulation voltage to the data-side electrode lines Y _{1 to} Y _{(j / 2)} is started. , timing of application of the data-side electrode lines Y _{(j / 2-1)} ~Y _j the modulation voltage is started (t ₃₎ and are different from each other. For this reason, the number of data-side electrode lines Y at which the application of the modulation voltage starts simultaneously becomes relatively small. Therefore, as shown by the line C in FIG. 5, the magnitude (ΔV) of the overvoltage applied to the scanning side electrode line X _i becomes relatively small. As a result, element destruction and unintended pixel light emission are suppressed.

From the viewpoint of reducing the overvoltage ΔV applied to the scanning side electrode line X _i , it is most preferable to make the timing for starting the application of the modulation voltage for each data side electrode line Y different from each other. As the number of data-side electrode lines Y for starting the operation decreases, the control circuit tends to become complicated.

Further, the longer the charging time of the data side driving circuit 30, the smaller the overvoltage magnitude (ΔV) applied to the scanning side electrode line X _i tends to be. For this reason, it is preferable that the charging time (Δt ₂ and Δt ₃ ) of the data side driving circuit 30 is long. Specifically, the charging time (Δt ₂ and Δt ₃ ) of the data side driving circuit 30 is preferably longer than the charging time (Δt ₁ ) of the scanning side driving circuit 20. The charging times Δt ₂ and Δt ₃ may be the same or different from each other.

(Embodiment 2)
The inorganic EL display device according to the second embodiment has the same configuration as that of the inorganic EL display device 1 according to the first embodiment except for the operation of the data side drive circuit 30. Here, the operation of the data side drive circuit 30 in the inorganic EL display device according to the second embodiment will be described in detail. In the description of the second embodiment, FIGS. 1 to 4 are referred to in common with the first embodiment. In addition, components having substantially the same function are described with reference numerals common to the first embodiment, and description thereof is omitted.

  FIG. 7 is a graph for explaining the operation of the data side driving circuit 30 in the non-light emitting frame pattern 1 in the second embodiment.

In the second embodiment, the data side drive circuit 30 applies the voltage + V ₃ to all the data side electrode lines Y simultaneously. However, as shown in FIG. 7, the charging time (Δt ₂ ) of the data side driving circuit 30 is set to be relatively long. Specifically, the charging time (Δt ₂ ) of the data side driving circuit 30 is set longer than the charging time (Δt ₁ ) of the scanning side driving circuit 20. For this reason, in the second embodiment, as described above, the longer the charging time of the data side electrode line Y, the smaller the magnitude (ΔV) of the overvoltage applied to the scanning side electrode line X _i . For this reason, element destruction and unintentional pixel light emission are suppressed.

  As described above, since the capacitive display device according to the present invention is one in which application of overvoltage to the light emitting layer is suppressed, a cellular phone, PDA, television, electronic book, monitor, electronic poster, watch, electronic Useful for shelf labels, emergency information, etc.

1 is a diagram illustrating a configuration of an inorganic EL display device 1 according to Embodiment 1. FIG. 3 is a diagram illustrating a configuration of a data side drive circuit 30 in the inorganic EL display device 1. FIG. 4 is a partially cutaway perspective view showing a configuration of an inorganic EL display panel 10. FIG. 3 is a diagram for explaining an outline of a driving method in the inorganic EL display device 1; FIG. 6 is a graph for explaining the operation of the data side driving circuit 30 in the non-light emitting frame pattern 1; 10 is a graph showing a potential change of a scanning electrode line X in a non-light emitting frame pattern 1 in a conventional inorganic EL display device 1. 12 is a graph for explaining the operation of the data side drive circuit 30 in the non-light emitting frame pattern 1 in the second embodiment.

Explanation of symbols

1 Inorganic EL display device
10 Inorganic EL display panel
11 Substrate
12 First dielectric layer
13 Inorganic EL light emitting layer
14 Second dielectric layer
20 Scanning side drive circuit
30 Data side drive circuit
31 Shift register latch circuit
32 Counter / Comparator Circuit
33 Pull-up switching element
34 Pull-down switching element
41 Scanning-side power supply circuit
42 Data side power supply circuit

Claims (7)

A plurality of scanning-side electrode lines substantially made of a transparent conductive oxide and extending in parallel;
A plurality of data side electrode lines extending in parallel in a direction intersecting with the plurality of scanning side electrode lines;
A capacitive light emitting layer that is provided between the plurality of scanning side electrode lines and the plurality of data side electrode lines, and emits light when a voltage equal to or higher than a light emission threshold voltage is applied;
A scanning side drive circuit that applies pulse voltages having different polarities alternately for each frame to the scanning side electrode line;
In the light emitting frame that emits light from the capacitive light emitting layer, no voltage is applied to the data side electrode line, or the voltage applied by the scanning side driving circuit is reversed after the scanning side driving circuit starts applying the pulse voltage. While applying a pulse voltage of polarity to make the voltage applied to the capacitive light emitting layer equal to or higher than the light emission threshold voltage, a voltage is applied to the data side electrode line in a non-light emitting frame that does not cause the capacitive light emitting layer to emit light. Without applying the pulse voltage having the same polarity as the voltage applied by the scan side drive circuit after the scan side drive circuit starts applying the pulse voltage. A data side drive circuit that is less than the emission threshold voltage;
With
The data side driving circuit starts applying the pulse voltage at a different timing for each one or a plurality of data side electrode lines in a non-light emitting frame that applies a pulse voltage having the same polarity as the pulse voltage applied by the scanning side driving circuit. Capacitive display device. The capacitive display device according to claim 1,
The data side driving circuit is a capacitive display device in which a charging time is longer than a charging time of the scanning side driving circuit in a non-light emitting frame to which a pulse voltage having the same polarity as the pulse voltage applied by the scanning side driving circuit is applied. . A plurality of scanning-side electrode lines substantially made of a transparent conductive oxide and extending in parallel;
A plurality of data side electrode lines extending in parallel in a direction intersecting with the plurality of scanning side electrode lines;
A capacitive light emitting layer that is provided between the plurality of scanning side electrode lines and the plurality of data side electrode lines, and emits light when a voltage equal to or higher than a light emission threshold voltage is applied;
A scanning side drive circuit that applies pulse voltages having different polarities alternately for each frame to the scanning side electrode line;
In the light emitting frame that emits light from the capacitive light emitting layer, the voltage applied by the scanning side drive circuit without applying a voltage to the data side electrode line or after the scanning side driving circuit starts applying the pulse voltage While applying a reverse polarity pulse voltage to make the voltage applied to the capacitive light emitting layer equal to or higher than the light emission threshold voltage, a voltage is applied to the data side electrode line in a non-light emitting frame in which the capacitive light emitting layer does not emit light. The voltage applied to the capacitive light emitting layer by applying a pulse voltage having the same polarity as the voltage applied by the scanning side driving circuit after the scanning side driving circuit starts applying the pulse voltage without applying the pulse voltage. A data side drive circuit that is less than the emission threshold voltage;
With
The data side driving circuit is a capacitive display device in which a charging time is longer than a charging time of the scanning side driving circuit in a non-light emitting frame to which a pulse voltage having the same polarity as the pulse voltage applied by the scanning side driving circuit is applied. . The capacitive display device according to claim 3,
The data side driving circuit starts applying the pulse voltage at a different timing for each one or a plurality of data side electrode lines in a non-light emitting frame that applies a pulse voltage having the same polarity as the pulse voltage applied by the scanning side driving circuit. Capacitive display device. The capacitive display device according to claim 1 or 3,
Each scanning-side electrode line is a capacitive display device substantially made of a transparent conductive oxide. The capacitive display device according to claim 1 or 3,
The scanning side drive circuit alternately applies a pulse voltage of one polarity equal to or higher than the emission threshold voltage of one polarity and a pulse voltage of the other polarity less than the emission threshold voltage of the other polarity,
The data side driving circuit emits light without applying a voltage to the data side electrode line and applying a pulse voltage of the other electrode in a light emitting frame in which the scanning side driving circuit applies the pulse voltage of one polarity. In a frame, a pulse voltage of one polarity is applied to the data side electrode line, while in the non-light emitting frame in which the scanning side drive circuit applies the pulse voltage of the one polarity, the one side is applied to the data side electrode line. A capacitive display device that applies a pulse voltage of an electrode and does not apply a voltage to the data-side electrode line in a non-light emitting frame in which the pulse voltage of the other electrode is applied. The capacitive display device according to claim 1 or 3,
The capacitive display device, wherein the capacitive light emitting layer is an inorganic electroluminescent light emitting layer.

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