JPH03146990A - Display device - Google Patents

Abstract

PURPOSE:To suppress a current flowing to a display area, to miniaturize a device and to reduce the cost thereof by making the polarity of a voltage impressed on the first display area of an image display part and the polarity of a voltage impressed on the second display area mutually reversed. CONSTITUTION:In a P frame, the voltage 0V is impressed on an electrode XA on a data side from a data side driving circuit 260 as a modulation voltage corresponding to light emission. On the other hand, since display data UData and LData which is respectively given to the driving circuits 260 and 270 are inverted by reversal control rotation, the voltage VM is impressed on an electrode XB from a power source circuit 280 through the circuit 270 as a write voltage. At this time, the voltage having a positive polarity VW + VM is impressed on an electrode YA on a scanning side from a power source circuit 310 through a driving circuit 220 as the write voltage by switching a switching circuit 340a. Besides, by switching a switching circuit 340b, the voltage -VW having a negative polarity is impressed on the electrode YB on the scanning side from a power source circuit 330 through a driving circuit 240 as the write voltage. Thus, light is emitted from picture elements A and B.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a display device using a capacitive flat matrix display panel (hereinafter referred to as a thin film EL display element), a plasma display, or the like.

2. Description of the Related Art For example, a double insulation type (or three-layer structure) thin film EL device is constructed as follows.

As shown in FIG. 3, a plurality of strip-shaped transparent electrodes 2 made of In2O are provided in parallel to each other on a glass substrate 1, and Y2O3, Si, N, etc., for example, are provided thereon.

AN20. ELLi2 and the same (Y2
O, l, S i 3N4. A dielectric material 3b such as AI 203 is sequentially laminated to a thickness of 500 to 500 mm using a thin film technique such as vapor deposition or sputtering to form a three-layer structure. A plurality of strip-shaped back electrodes 5 made of the like are provided in parallel to each other.

The thin film EL element has a dielectric material 3a between its electrodes.

Since it has ELLi2 interposed therebetween at a ratio of 31:1, it can be seen as a capacitive element in terms of an equivalent circuit.

Further, as is clear from the voltage-luminance characteristics shown in FIG. 4, this thin-film EL element is driven by applying a relatively high voltage of about 200 μm. This thin 1iEL element emits light with high brightness when exposed to an alternating current electric field, and has a long lifespan.

Conventionally, among display devices using such thin film EL elements, in the case of a display device with a large display capacity (for example, 1024 x 800 dots), the data side electrode of the display panel is
Generally, a method is adopted in which the display screen is divided into an upper screen and a lower screen, and the duty of the drive pulse is lowered.

FIG. 5 is a block diagram schematically showing the configuration of a conventional thin film EL display device in which the screen is divided into two and driven. The display panel 10 is composed of a thin film EL element, and in the figure, only electrodes are shown, with electrodes extending in the column direction being data side electrodes X and electrodes extending in the row direction being scanning side electrodes Y. The data side electrode X is located at the center of the display panel IQ.
The display panel 10 is divided into two parts in the upper half.
image display area 10a and a second image display area 1 in the lower half
It is divided into 0b and 0b.

The scanning side drive circuits 20.30 and 40.50 are drive circuits consisting of high-voltage push-pull driver ICs, of which the scanning side drive circuit 2030 (2-) is the scanning side electrode of the first image display area 10a. is associated with Y, and the remaining 2
The two scanning side drive circuits 40 and 50 are connected to the second image display area 1.
It is associated with the scanning side electrode Y of 0b. Also, the first
Of the two scan-side drive circuits 20 and 30 corresponding to the image display area 10a, the first scan-side drive circuit 20 performs scan static electricity reduction f! The second scan-side drive circuit 30 is associated with the odd-numbered lines of Y, and the second scan-side drive circuit 30 is associated with the even-numbered lines of the scan-side electrode) r. Similarly, among the two scan-side drive circuits 40.50 corresponding to the second image display area 101:+, the first scan-side drive circuit 40 is connected to the odd line of the scan-side electrode Y, and The drive circuits 50 are respectively associated with even-numbered lines of the scanning side electrodes Y.

These scanning side drive circuits 20, 30, 40.50 include
For example, Pch, which is a pull-up switching element)
Nch transistor and pull-down switching element
Output ports 21, 31, 41.51 are configured by connecting transistors in series and are associated with each scanning side electrode Y.
, and logic circuits 22, 32, 42.52, etc., including shift registers that control on/off of each transistor of these output ports 21, 31, 41.51.

The data side drive circuit 60.7'0 is also a drive circuit consisting of a high voltage push-pull driver IC, and one of the data side drive circuits 60 is connected to the data side electrode X of the first image display area 10a. The two data side drive circuits 70 are respectively associated with the data side electrodes X of the second image display area 10b.

These data side drive circuits 60 and 70 also include, for example, P.
c: Output port 1.71 which is configured by connecting a h' l-transistor and N(・1'l transistor in series and corresponds to each data side electrode X, and each transistor of these output port 1.71) It includes logic circuits 62 and 72 consisting of shift registers and the like for on/off control.

The first power supply circuit 80 has a modulation voltage ■H (here +5.
The first switching circuit 90 connected to the next stage is commonly connected to all the Pch transistors of the output capacitors 61 and 71 of the data side drive circuit 60, 70. Pull-up common line 101
The modulation voltage ■ given from the power supply circuit 80 to . This is a circuit for supplying

The second power supply circuit 110 has a positive polarity write voltage Vw +
V H (here 200 V + 50 V = +2
50 V'), and the second switching circuit 120 connected to the next stage outputs all Pch of the output ports 21 to 51 of the scanning side drive circuits 20 to 50.
The potential of the pull-up common line 102 commonly connected to the transistors is the write voltage ■ output from the power supply circuit 110. This is a circuit for switching to +■9.

The third power supply circuit 130 is a circuit that outputs a negative polarity write voltage ■o (-200V in this case), and the third switching circuit 140 connected to the next stage is a circuit that outputs a negative polarity write voltage ■o (here -200V). Total N of output boats 21 to 51
h) This is a circuit for switching and setting the potential of the pull-down common line 103 commonly connected to the transistors to the write voltage -Vl output from the power supply circuit 130 or the GND potential.

The data inversion control circuit 150 receives display data UDa, t a sent from a signal generator (not shown).
, L D at a is set to 1 by the inverted control signal RVC.
This is a circuit for performing AC drive by inverting each frame, and includes two exclusive OR gates 150a and 150b.
It is made up of. One exclusive OR gate 1
The display data UData outputted via 50a is sent to the data side drive circuit 60 corresponding to the first image display area 10a.
The display data LData outputted through the other exclusive OR gate 150b is supplied to the data side drive circuit 70 corresponding to the second image display area 10b.

FIG. 6 shows a pixel A (located at the intersection of the data side electrode XA and the scanning side electrode YA) in the upper half image display area 10a of the display panel 10 of the thin film EL display device, and the lower half image display area. Pixel B of tab (data side electrode
12 is a timing chart showing an operation in a case where both the scanning electrode YA and the scanning electrode Y corresponding to the scanning electrode YA emit light. Among them, FIG. 6(1) shows the waveform of the modulation voltage applied to the data side electrode XA, FIG. 6(2) shows the waveform of the write voltage applied to the scanning side electrode YA, and FIG. 6(3) shows the waveform of the write voltage applied to the scanning side electrode YA. 6 shows the waveform of the modulation voltage applied to the data side electrode XIl, FIG. 6 (4) shows the waveform of the write voltage applied to the scanning side electrode Y, and FIGS. , B respectively show the waveforms of the currents supplied during light emission.

Next, the operation of the thin film EL display device will be explained with reference to the timing chart of FIG.

First, the scanning side type! Positive polarity write voltage VI to YA, Y,
We start with a P-driven frame (hereinafter referred to as a P frame) to which l+VM is applied.

In this P drive, the ground potential (0■) is used as a modulation voltage corresponding to light emission from the data side drive circuit 60 as shown in FIG.
As shown in 1) and (3), the voltage is applied to the data side electrodes XA and XIl. Further, at this time, the positive polarity voltage Vl+V outputted from the second power supply circuit 110 via the second switching circuit 120 is used as the write voltage from the scanning side drive circuit 20.40 in FIG. 6 (2>, As shown in (4), the voltage is applied to the scanning side electrodes YA, Y. At this time, the third switching element 140 is switched to the GND potential.

Pixels A and B include a data side electrode XA, a scanning side electrode YA,
A potential difference of 250 cm between the data side electrode X6 and the scanning side electrode Ya is applied as an effective voltage. This effective voltage is sufficiently higher than the light emission threshold voltage (200 cm) of the thin film EL element, so that pixels A and B emit light.

Thereafter, in the same manner, each pixel is driven in accordance with the line sequence of the scanning side electrode Y at the same timing in each of the upper half image display area 10a and the lower half image display area 10t1 of the display panel 10, and one screen is displayed. finish.

Subsequently, a negative write voltage - is applied to the scanning side electrodes YA, Y.
②, is applied to the frame of N [motion (hereinafter referred to as N frame).

In this N drive, the voltage V8 outputted from the first power supply circuit 80 via the first switching circuit 90 is used as a modulation voltage corresponding to light emission from the data side drive circuit 60.70 in FIGS. As shown in 3), the data side electrode XA,
X, is applied. Also, at this time, the third power supply circuit 13
0 through the third switching circuit 140 is the negative polarity voltage ~Vw outputted from the scanning side drive circuit 20.0 as the write voltage. '40 to the scanning side electrodes YA, Y as shown in FIGS. 6(2) and (4). by this,
Pixels A and B include a data side electrode XA, a scanning side electrode YA,
Potential difference between data side electrode Xll and scanning side electrode Y6: 250V
(the polarity is opposite to that in P drive) is applied as an effective voltage, and pixels A and B emit light.

0 Thereafter, in the same manner, each pixel is driven at the same timing in each of the image display area 10a in the upper half of the display panel 10 and the image display area 10b in the lower half of the display panel 10 in accordance with the line sequence of the scanning side electrode Y. The display ends, closing one AC cycle.

When the pixels A and B perform non-emission display, the modulation voltage applied to the data side electrodes XA and X in the above driving is V in the P frame. , and the ground potential (O
v), the other operations are the same as in the case of emitting light.

Problems to be Solved by the Invention However, in the above thin film EL display device, the polarity of the applied voltage for AC driving is the same in the upper half image display area 10a and the lower half image display area 10b. The peak current flowing in the upper and lower image display areas 1
0a, 101: is the sum of the peak currents flowing to +, and the 6th
As shown in Figures (5) and (6), the value is quite large (approximately 300 mA in the figure).

In order to flow such a large current, the circuit elements constituting the scan side drive circuits 20 to 50 and the data side drive circuits 60 and 70 must be of large capacity that meets the maximum rating so as not to impair reliability. In addition, a smoothing capacitor is required to reduce ripple when a large peak current flows, and as the display panel 10 becomes larger, a smoothing capacitor with a larger capacity must be used, resulting in an increase in cost. There were problems such as an increase in the size of the device, which impeded miniaturization of the device.

Therefore, an object of the present invention is to provide a display device that can suppress the peak current flowing during driving to a low level, thereby reducing costs and downsizing the device.

Means for Solving the Problems The present invention has an image display section in which a dielectric layer is interposed between a plurality of scan-side electrodes and a plurality of data-side electrodes arranged in directions that intersect with each other. In a display device that drives an image display section by applying an output modulation voltage to a data-side electrode and sequentially applying a write voltage output from a write drive circuit to a scanning-side electrode, the image display section is In addition to dividing into two display areas,
The modulation drive circuit and the write drive circuit are connected to a first circuit unit that drives a first display area of the image display unit, and a second display area of the image display unit has a polarity opposite to that of the first display area. This is a display device characterized by being divided into a second circuit section and a second circuit section driven by an applied voltage of.

According to the present invention, the voltage applied to the first display area of the image display section and the voltage applied to the second display area have opposite polarities, so that the peak current flowing in the first display area The peak currents flowing through the second display area and the second display area are also currents in opposite directions, and the peak current required for the image display section can be suppressed to the amount of current flowing through one display area.

Embodiment FIG. 1 is a block diagram showing a schematic configuration of a display device which is an embodiment of the present invention. The display device of this embodiment is a thin film EL display device, and the display panel 210 is a thin film EL display device.
In the figure, only electrodes are shown, with electrodes extending in the column direction being data-side electrodes X, and electrodes extending in the row direction being scan-side electrodes Y. The data side electrode X is the display panel 21
The display panel 21 is divided into two parts at the center of 0.
0 is divided into a first image display area 210a in the upper half and a second image display area 210b in the lower half.

The scanning side drive circuits 220, 230, 240, and 250 are drive circuits consisting of high voltage push-pull driver ICs, and two of the scanning side drive circuits 220, 230 are connected to the scanning side electrode Y of the first image display area 210a. The remaining two scanning side drive circuits 240 and 250 are
is associated with the scanning side electrode Y of the image display area 210b.

Furthermore, among the two scan-side drive circuits 220 and 230 corresponding to the first image display area 210a, the first scan-side drive circuit 220 is connected to the odd-numbered line of the scan-side electrode Y, and the second scan-side drive circuit 230 is connected to the odd-numbered line of the scan-side electrode Y. are respectively associated with even-numbered lines of the scanning side electrode Y.

9 4 Similarly, among the two scan side drive circuits 240 and 250 corresponding to the second image display area 210b, the first scan side drive circuit 240 connects the second scan side drive circuit to the odd line of the scan side electrode Y. The drive circuits 250 are respectively associated with even-numbered lines of the scanning side electrodes Y.

These scanning side drive circuits 220, 230, 240.25
0, for example, P which is a pull-up switching element.
Output port 2 is configured by connecting in series a c t+ ) lath register and an N ch ) lath register which is a pull-down switching element, and is associated with each scanning side electrode Y.
21, 231, 241, and 251, and logic circuits 222, 232, and shift registers that control on/off the respective transistors of these output ports 221 to 251.
242°252, etc. are included.

The data side drive circuits 260 and 270 are also drive circuits consisting of high voltage push-pull driver ICs, one of which
The two data side drive circuits 260 are connected to the first image display area 21.
The other data side drive circuit 270 is also connected to the scanning side drive circuits 260 and 270 respectively associated with the data side electrode For example, each data side electrode
Turns on the output ports 261, 271 associated with the
Logic circuit 26 consisting of a shift register etc. for off control
2,272, etc.

The first power supply circuit 280 has a modulation voltage VM (here -1
-50V), and the first switching circuit 290 connected to the next stage is a circuit that outputs all F of the output ports 261 and 271 of the data side drive circuits 260 and 270.
'ch h 1 - Modulating voltage (■) output from the power supply circuit 280 for the potential of the pull-up common line 301 commonly connected to the last register. This is a circuit for switching and setting.

5 The second power supply circuit 310 has a positive polarity write voltage v u
+ v H (here 20 OV +50 V −+
250V), and the second switching circuit 320a connected to the next stage is the scanning side drive circuit 220, which is associated with the upper half image display area 210a.
230 output boats 221, 231 total P c h )
Pull-up common line 3 commonly connected to the last resistor
The potential of 02a is the write voltage V output from the power supply circuit 310, -1-V. This is a circuit for switching and setting.

On the other hand, the third switching circuit 320b connected to the next stage of the same second power supply circuit 310 is connected to the scanning side drive circuits 240 and 2 associated with the lower half image display area 210b.
50 output ports 241゜251 all PC1] Pull-up common line 302 commonly connected to the transistor
The potential of b is the write voltage V output from the power supply circuit 310.
This is a circuit for switching and setting w + V n.

The switching operation of this switching circuit 320b is set so as to work oppositely to the switching operation of the switching circuit 320El. That is, the switching circuit 320
In a frame in which the switching circuit 320a is turned on and the write voltage Vll+VM is supplied, the other switching circuit 320b is turned off, and conversely, in a frame in which the switching circuit 320a is turned off, the other switching circuit 320b is turned on. Write voltage V, 10V. work to supply.

The third power supply circuit 330 has a negative polarity write voltage ■o (
Here, the fourth switching circuit 340a connected to the next stage is a circuit that outputs -200V), and the fourth switching circuit 340a connected to the next stage is connected to the output ports 221, 230 of the scanning side drive circuits 220, 230 associated with the upper half image display area 210a. Total Nc of
h) This is a circuit for switching and setting the potential of the pull-down common line 303a commonly connected to the last register to the write voltage -■ output from the power supply circuit 330 or the GND potential.

On the other hand, the fifth switching circuit 340b connected to the next stage of the same third power supply circuit 330 connects the output port 241251 of the scanning 7 8 side drive circuit 240.250 associated with the lower half image display area 210b. This is a circuit for switching and setting the potential of the pull-down common line 303b commonly connected to all Nch) registers to the write voltage -1 outputted from the power supply circuit 330 or to the GND potential.

The switching operation of this switching circuit 340t+ is set to work oppositely to the switching operation of the switching circuit 340a. That is, the switching circuit 3
40a is turned on and supplies the write voltage o, the other switching circuit 340b is at GND potential, and conversely, in a frame where the switching circuit 340a is at GND potential, the other switching circuit 34a is at GND potential.
0b is turned on and works to supply the write voltage -Vo.

The data inversion control circuit 350 receives display data UData and LDa sent from a signal generator (not shown).
This circuit performs AC driving by inverting ta every frame using inversion control signals R and VC, and inputs it to two exclusive OR gates 35Oa and 350b and the exclusive OR gate 350a side. The inverter 350C inverts the inversion control signal RVC midway.

The display data U D a ta outputted through one exclusive OR gate 350a is displayed in the upper half of the image display area 2.
10a to the data side drive circuit 260,
The display data LData outputted through the other exclusive OR gate 350b is applied to the data side drive circuit 270 corresponding to the lower half image display area 210b. In this way, since the display data U Data provided to the data side drive circuit 260 and the display data L Data provided to the data side drive circuit 270 are inverted data, for example, the upper half of the image Display area 21
When V□ is applied as a modulation voltage corresponding to light emission to the data side electrode X of 0a, the lower half image display area 210b
A ground potential (Ov) is applied to the data side electrode X as a modulation voltage corresponding to light emission.

FIG. 2 shows 9 pixels A (located at the intersection of the data side electrode XA and the scanning side electrode YA) of the upper half image display area 210a of the display panel 210 of the thin film EL display device, and the lower half image display area. Pixel B in area 210b
12 is a timing chart showing an operation when both the data side electrodes Xll and the scanning side electrodes VB corresponding to the scanning side electrodes YA are made to emit light. Of these, Figure 2 (1) shows the waveform of the modulation voltage applied to the data side electrode XA, Figure 2 (2) shows the waveform of the write voltage applied to the scanning side electrode YA, and Figure 2 (3) shows the waveform of the write voltage applied to the scanning side electrode YA. is the waveform of the modulation voltage applied to the data side electrode XB, FIG. 2(4) is the waveform of the write voltage applied to the scanning side electrode
Figure (5) shows the waveform of the current supplied based on P drive when pixels A and B emit light, and Figure 2 (6) shows the waveform of the current supplied based on N drive when pixels A and El emit light. It shows.

Next, the operation of the thin film EL display device will be explained with reference to the timing chart of FIG.

First, a positive write voltage V1 is applied to the scanning side electrode YA.

The first frame starts with a frame (hereinafter referred to as a P frame) in which P drive is applied to the image display area 210a to which a voltage is applied.

In this P frame, a ground potential (OV) as a modulation voltage corresponding to light emission is applied to the data side electrode XA by the data side drive circuit 260 as shown in FIG. 2(1). On the other hand, even if the display data corresponds to the same light emission, the display data UData given to the data side drive circuit 260 and the display data LD given to the data side drive circuit 270
ata are inverted with respect to each other by the function of the data inversion control circuit 350, so the first power supply circuit 280 supplies the first The voltage VH supplied through the switching circuit 290 in FIG.
) is applied as shown.

At this time, the second switching circuit 320a (Vw +
V M output) and the fourth switching circuit 340a (
'clamped to GND potential), the second
The positive polarity voltage ■ output from the power supply circuit 310. +■
9 is applied as a write voltage from the scanning side drive circuit 220 to the scanning side electrode YA as shown in FIG. 2(2) 1 2 . Also, due to the switching operation of the third switching circuit 320b (output 0FF) and the fifth switching circuit 340b (clamped to -V), -
), the negative polarity voltage -vl output from the third power supply circuit 330 is applied as a write voltage from the scanning side drive circuit 240 to the scanning side electrode VB'\ as shown in FIG. 2(4). That is, in pixel A, P5V motion is performed (V), while in pixel B, N drive is performed, and pixels A and B are
data side electrode XA and scanning side electrode)'9, data side electrode
In this case, a potential difference of 250 V between the scanning side electrode Y8 is applied as an effective voltage. This effective voltage is sufficiently higher than the light emission threshold voltage (200V) of the thin film EL element, so that pixels A and B emit light.

Subsequently, the process moves to a frame I (hereinafter referred to as an N frame 11) which is N-driven for the image display area 210a to which a negative write voltage VII is applied to the scanning side electrode YA.

In this N frame, the data side type vfiXAl\ is applied from the data side drive circuit 260 to the first switching circuit 29 from the first power supply circuit 280 as a modulation voltage corresponding to light emission.
The voltage VH supplied through 0 is applied as shown in FIG. 2(1). At this time, the second switching circuit 32
0 a' (output OFF> and fourth switching circuit 3
By switching operation of 40a (clamped to Vw),
Negative polarity voltage -V output from the third power supply circuit 330
w is applied as a write voltage from the scanning side drive circuit 220 to the scanning side electrode YA as shown in FIG. 2(2).

On the other hand, the data-side drive circuit 270 applies the data-side electrode XB to the ground potential (0
(2) is applied as shown in FIG. 2 (3). Also,
Third switching circuit 320b (outputs V, +V)
and the fifth switching circuit 3'401:1 (clamped to GND potential), the second power supply circuit 3
The positive polarity voltage vw + VM outputted from the scanning side drive circuit 240 as a write voltage is applied to the scanning side electrode X.
B as shown in FIG. 2 (4). In other words, while 1 pixel A performs N driving, pixel B performs 3P driving, and pixels A and B have a data side electrode XA, a scanning side electrode YA, a data side electrode XB and a scanning side electrode. A potential difference of 250 V between Y and Y is applied as an effective voltage. This effective voltage is one minute higher than the light emission threshold voltage (200V) of the thin film EL element, and thereby pixels A and B emit light.

Thereafter, in the same manner, each pixel is driven at the same timing in the image display area 210a in the upper half of the display panel 210 and the image display area 210b in the lower half according to the line sequence of the scanning side electrode Y, and the display of one screen is completed. , closes one AC cycle.

When the pixels A and B perform non-emission display, the modulation voltage V is applied to the data side electrode XA in the P frame. , the modulation voltage applied to the data side electrode XB is at ground potential (
On the other hand, in the N frame, the modulation voltage applied to the data side electrode XA becomes the ground potential (Ov), and the modulation voltage applied to the data side electrode X changes to ■. The other operations are the same as when emitting light.

As described above, in this thin film EL display device, since the polarity of the applied voltage for AC driving is reversed between the upper half image display area 210a and the lower half image display area 210b, Output positive voltage V
Peak current based on w + VM (shown in Figure 2 (5))
and negative polarity voltage −■ output from the power supply circuit 330,
The peak current of the reverse flow based on (shown in Figure 2 (6))
The sum of these becomes the overall peak current. Therefore, this peak current value is half that of the conventional case (Fig. 2 (5) (6)
), it will be reduced to approximately 150 mA>.

In the above embodiment, the case 6 of a thin film EI-display device has been described, but the present invention is not limited to this and can be similarly applied to a simple matrix drive type liquid crystal display device.

Effects of the Invention As described above, according to the display device of the present invention, the voltage applied to the first display area of the image display section and the voltage applied to the second display area have opposite polarities. Since the configuration is as follows, the peak current flowing in the first display area and the peak current flowing in the second display area are currents in opposite directions, and the peak current required for the image display section is transferred to one display area. The current flowing through the device can be suppressed to the amount that flows through the device, making it possible to downsize the device and reduce costs.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a schematic configuration of a display device that is an embodiment of the present invention, FIG. 2 is a timing chart showing the operation of the display device, and FIG. 3 is a part of thin film E and L elements. A cutaway perspective view, FIG. 4 is a graph showing voltage-luminance characteristics of a thin film EL element, FIG. 5 is a block diagram showing a schematic configuration of a conventional thin film EL display device, and FIG. 6 is an operation of the display device. FIG. 210...Display panel, 210a...First image display area, 210b...Second image display area, 220
゜230.240,250...Scanning side drive circuit, 26
0.270...Data side drive circuit, 280...First power supply circuit, 290, 320a, 320b,
340a, 340b... switching circuit, 310.
...Second power supply circuit, 330...Third power supply circuit, 3
50...Data inversion control circuit

Claims (1)

[Scope of Claims] A modulated voltage output from a modulation drive circuit, comprising an image display section with a dielectric layer interposed between a plurality of scanning side electrodes and a plurality of data side electrodes arranged in directions crossing each other. In a display device that drives an image display section by applying a voltage to a data side electrode and sequentially applying a write voltage output from a write drive circuit to a scan side electrode, the image display section is divided into two display areas, and the image display section is divided into two display areas. ,
a first circuit section that drives the modulation drive circuit and the write drive circuit to drive a first display area of the image display unit; and a second display area of the image display unit that applies polarity opposite to that of the first display area. A display device characterized in that it is divided into a second circuit section driven by voltage.