JP2003186416A - Driving circuit and driving method for display element - Google Patents

Driving circuit and driving method for display element

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Publication number
JP2003186416A
JP2003186416A JP2001387491A JP2001387491A JP2003186416A JP 2003186416 A JP2003186416 A JP 2003186416A JP 2001387491 A JP2001387491 A JP 2001387491A JP 2001387491 A JP2001387491 A JP 2001387491A JP 2003186416 A JP2003186416 A JP 2003186416A
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Japan
Prior art keywords
column
output terminals
electrode
driver
electrodes
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JP2001387491A
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Japanese (ja)
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JP4043012B2 (en
Inventor
Yuji Nozu
裕二 野津
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Asahi Glass Co Ltd
Optrex Corp
オプトレックス株式会社
旭硝子株式会社
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Priority to JP2001387491A priority Critical patent/JP4043012B2/en
Publication of JP2003186416A publication Critical patent/JP2003186416A/en
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Abstract

(57) An object of the present invention is to improve the efficiency of mounting wiring when a liquid crystal display element and a driver IC are connected. A drive circuit for a simple matrix type liquid crystal panel in which a row driver is connected to a row electrode, a column driver is connected to a column electrode, and a liquid crystal layer is disposed between the row electrode and the column electrode. The first group of column electrodes and the second group of column electrodes are substantially bisected in the numerical order in which the column electrodes are spatially arranged. All the column electrodes of the second group are arranged continuously, and the output terminals of the column driver are divided into a first group output terminal 1L, a second group output terminal 1R, and a third group output terminal 10. The first group of column electrodes and the first group of output terminals are connected one to one, the second group of column electrodes and the second group of output terminals are connected one to one, and the third group of output terminals is Do not connect to column electrodes.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display element drive circuit and drive method. Specifically, the present invention relates to a drive circuit and a drive method for a display element of a simple matrix system in which row electrodes and column electrodes are arranged orthogonally.

[0002]

2. Description of the Related Art Liquid crystal display devices are widely used in consumer appliances, pagers, personal digital assistants, calculators, watches and the like. Organic EL devices are also being researched for practical use, and are beginning to be used for mobile information terminals, TV displays, and the like.

There are two methods for driving the display element, that is, an active matrix type using an active element such as a TFT and a simple matrix type using row electrodes and column electrodes arranged in a cross manner without using the active element.

A simple matrix type display element has a simpler structure and is easier to manufacture than an active matrix type display element. For example, there are a TN liquid crystal display element and an STN liquid crystal display element. A chiral nematic liquid crystal display element having a phase transition type operation mode is also a display element that can be driven by a simple matrix type (Japanese Patent Laid-Open No. 2001-337314).
See the bulletin). Although the organic EL display element is a current-driven element, it can be driven in a simple matrix type as with a liquid crystal display element (see JP 2001-43975A). Further, a full color display device is also realized by using RGB color filters in combination. Hereinafter, the case of a liquid crystal display element will be described, but the same applies to other types of display elements.

Usually, a simple matrix type liquid crystal display element is driven by using a drive circuit provided outside the display panel or a drive IC integrated into one chip. For example, in the case of a dot matrix type liquid crystal display element in which row electrodes and column electrodes are arranged orthogonally, depending on the screen size (the number of electrodes), the number of duty in multiplex driving, the range of driving voltage used and the driving capability, Various dedicated ICs are produced.

A selection voltage or a non-selection voltage is applied to the row electrodes (or also referred to as scan electrodes) of the simple matrix type liquid crystal display element. When a certain row electrode is selected, a column voltage (or signal electrode) intersecting the row electrode is supplied with a column voltage according to each pixel. The voltage that is the difference between the row voltage and the column voltage becomes the drive voltage applied to the liquid crystal of each pixel.

Then, while row electrodes are sequentially selected, a column voltage is applied to each column electrode, and when all the row electrodes are selected, this is repeated to perform display. In this way, line-sequential driving is performed. A driving method is known in which, when row electrodes are selected, a plurality of rows are simultaneously selected and driven, instead of one by one. This driving method is also called the MLA method (see, for example, US Pat. No. 5,262,881).

There are many types of screen sizes of simple matrix type liquid crystal display devices, from small to large. For example, the specifications for cellular or pager are 80x16 dots, 97x32 dots, 102x4 dots.
There are 8 dots, 112 × 64 dots, 128 × 96 dots, and the like.

As a driver IC corresponding to this, S1
D12303, S1D15300, S1D15600,
S1D15605, L5411054002000 and L
There is 1F10003T (manufactured by Seiko Epson Corporation).

Further, in the VICS compatible LCD, 248
There is one with x60 dots. The black and white transflective module specifications include those of 120 × 60 dots, 160 × 120 dots, 320 × 200 dots, and 160 × 240 dots.

As a driver IC corresponding to this, L5
4120050010000 (manufactured by Seiko Epson)
There is.

Also, as a driver IC for a 256-color color STN liquid crystal display element with a screen size of 128 RGB × 176, HD66762, as a driver IC with a 65 K color STN liquid crystal display element and a screen size of 132 RGB × 176, a HD66766 (Hitachi) Manufactured by).

Further, as a general screen size of a liquid crystal display device, QCIF (176 × 144 dots), CIF
(352 x 288 dots), QVGA (320 x 240)
Dot), VGA (640 × 480 dots), and the like.

Among these specifications, driver ICs for liquid crystal display elements having a small to medium size screen size are used in large numbers and are mass-produced by semiconductor manufacturers. The output of the driver IC is designed to be switched according to the required number of pixels of the liquid crystal panel.

Further, it is required to reduce the size and weight of the liquid crystal display element and the display device. Therefore, it is required to simplify the mounting of the driver IC, which is a part of the display device, on the liquid crystal panel and to increase the density. for that reason,
The driver IC is designed so that the output wiring can be distributed in the left-right direction from the central portion in the longitudinal direction of the package and the wiring for connection to the liquid crystal panel can be routed compactly.

Generally, since the driver IC is surface-mounted on the substrate of the liquid crystal panel, the ITO on the substrate surface is extended so that the driver IC can be pulled out. At this time, it is important to efficiently mount the wiring that connects the output terminal of the driver IC and the column electrode of the liquid crystal panel in consideration of the size of the display screen of the liquid crystal panel and the total number of pixels.
It is necessary to route many wirings on a limited substrate surface.

FIG. 4 schematically shows an example of the internal structure of the driver IC. The internal circuit 3 is provided inside the driver IC 30.
2, an input pad 33, and an output pad 31 are provided. The wiring between the output terminal and the output pad is fixed internally, and is not generally changed when the driver IC is used. Further, regarding the circuit connection inside the driver IC, the internal circuits and the output pads are arranged in a one-to-one correspondence in a predetermined order.

Usually, output terminals connected to the column electrodes are arranged on one long side of the driver IC. An input terminal and a power supply terminal are arranged on the opposite side.

[0019]

Generally, the driver I
When the output terminal of C is connected to the column electrode of the liquid crystal panel, the wiring is arranged so as to be substantially mirror-symmetrical with the central portion of the driver IC in the longitudinal direction or the central portion of the column electrode of the liquid crystal panel as an axis. To be done. Therefore, the wiring made of ITO is arranged symmetrically with respect to the axis thereof.

When the total number of output terminals of the driver IC and the total number of column electrodes of the liquid crystal panel are completely the same, one-to-one connection can be made. Therefore, almost all wirings can be arranged symmetrically. As shown in FIG.
The wiring for connecting the output terminal of the driver IC 30 to the liquid crystal panel 40 is completely aligned in mirror symmetry.

However, the output terminal of the driver IC may not match the number of electrodes. As described above, the driver ICs are prepared for many specifications of the liquid crystal panel, but it is not always possible to meet the specifications of all liquid crystal display elements.

In that case, a driver IC having more output terminals than the number of electrodes of the liquid crystal panel is adopted. As a result, a “number mismatch” occurs. Then, a part of the output terminal of the driver IC 30 (region of reference numeral 10 in FIG. 6) is not used and is in an open state. In addition, the wiring from the driver IC 30 to the liquid crystal panel 40 does not have mirror symmetry, and the spatial arrangement of the wiring group is not uniform.

In this case, the design efficiency of the wiring and components on the substrate surface is reduced. An object of the present invention is to enable wirings for connecting the output terminals of the driver IC and the column electrodes of the liquid crystal panel to be arranged substantially in mirror symmetry even with various specifications.

The existing driver IC can be used even if the specifications of the liquid crystal panel change significantly. Then, a mirror-symmetrical arrangement can be made with the central portion of the driver IC in the longitudinal direction or the central portion of the column electrode of the liquid crystal panel as an axis.

[0025]

That is, according to the first aspect of the present invention, row electrodes and column electrodes are arranged orthogonally, a row driver is connected to the row electrodes, and a column driver is connected to the column electrodes.
In a drive circuit of a display device, in which an electro-optic layer is arranged between a row electrode and a column electrode, the connection between the column electrode and the output terminal of the column driver has the following conditions (1), (2) and (3). The present invention provides a drive circuit for a display device, which satisfies the above requirement. (1) The column electrode is divided into a first group column electrode and a second group column electrode substantially in space arrangement, and the first group column electrodes are all continuous, and the second group column electrode is Are all continuous,
(2) The output terminals of the column driver are the first group of output terminals and the second group of output terminals.
It is divided into an output terminal of the group and an output terminal of the third group, and (3)
The first group of column electrodes and the first group of output terminals are connected in a one-to-one correspondence, the second group of column electrodes and the second group of output terminals are connected in a one-to-one correspondence, and the third group of output terminals are arranged in a column. Not connected to electrodes, first
The output terminal of the third group is arranged between the output terminal of the group and the output terminal of the second group.

In the second aspect, the row electrodes and the column electrodes are arranged orthogonally, the row driver is connected to the row electrodes, the column driver is connected to the column electrodes, and the electro-optical device is provided between the row electrodes and the column electrodes. A display element drive circuit having layers arranged, wherein the connection between the column electrode and the output terminal of the column driver satisfies the following conditions (4), (5) and (6): To provide a driving circuit. (4) Due to the spatial arrangement, the column electrodes are substantially bisected into the first group of column electrodes and the second group of column electrodes, and the first group of column electrodes are all continuous;
The column electrodes of the group are all continuous, and (5) the output terminals of the column driver are the output terminals of the first group, the output terminals of the second group, and the third group.
(6) The first group of column electrodes and the first group of output terminals are connected in a one-to-one relationship, and the second group of column electrodes and the second group of output terminals are in a one-to-one relationship. The output terminals of the third group are not connected to the column electrodes, and the output terminals of the third group are
The two groups of the output terminals of the L group and the output terminals of the third R group are spatially separated and arranged, and the first output terminal is provided between the output terminals of the third L group and the output terminals of the third R group. The second output terminal is arranged, and all the output terminals of the first output terminal and the second output terminal are arranged continuously.

Aspect 3 is that the first group of output terminals and the first group
The group of wirings connecting the column electrodes of the group and the group of wirings connecting the output terminals of the second group and the column electrodes of the second group are mirror-symmetrical with respect to the center line that substantially bisects the column electrodes. A drive circuit for a display element according to aspect 1 or 2, which is arranged in the above.

In a fourth aspect, the row electrode and the column electrode are arranged orthogonally, the row driver is connected to the row electrode, the column driver is connected to the column electrode, and the electro-optical device is provided between the row electrode and the column electrode. A method of driving a display element in which layers are arranged, wherein an arithmetic circuit for sending column data to a column driver is provided, a memory circuit for storing column data is provided, and the column electrodes are arranged in a spatial arrangement in the first group. Substantially bisected into a column electrode and a second group of column electrodes, the first group of column electrodes are all continuous, the second group of column electrodes are all continuous, and the column driver output terminals are It is divided into an output terminal of the first group, an output terminal of the second group and an output terminal of the third group, and the column electrodes of the first group and the output terminals of the first group are connected one to one, and The column electrodes and the output terminals of the second group are connected one-to-one, and the output terminals of the third group are not connected to the column electrodes. When storing the column data in the memory circuit, the column data corresponding to the order of the column electrodes is arranged in order in the address of the memory circuit. At that time, a blank address is provided without using a part of the address, and the blank address is A method for driving a display element is provided, which corresponds to the third output terminal and then sends column data to a column driver.

Aspect 5 uses a driving method in which display is performed by a frame rate control method using a plurality of frame modulations, and the phase of frame rate control is shifted in units of a pixel block composed of a plurality of pixels.
A method of driving a display element according to aspect 4, wherein the number of output terminals of the third group is an integral multiple of the number of columns of the pixel block when performing spatial modulation.

Aspect 6 provides the method for driving a display element according to Aspect 4 or 5, wherein the electro-optical layer is STN liquid crystal, TN liquid crystal or chiral nematic liquid crystal having a phase transition type operation mode.

Aspect 7 provides the method for driving a display element according to Aspect 4 or 5, wherein the electro-optical layer is an organic EL.

[0032]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, a new structure has been found for a driving circuit and a driving method for a display element in which a simple matrix driving method is performed. Basically, one column driver that drives the column side is assumed, and the connection between the column driver and the column electrode of the display element is as described above.

A single column driver means a device that is composed of an integrated circuit (IC) enclosed in a single package that is usually used. Usually, one-chip type is often used.

When the present invention is applied, the number of column electrodes of the display element is preferably 100 or more (for monochrome display), more preferably 120 or more. This is because the design for determining the connection becomes difficult when the number is large. The upper limit of the number of column electrodes is determined by the screen size of the display element. When the number of column electrodes is large, the total number of pins of the column driver, which is a one-chip IC, is limited. Therefore, a plurality of column drivers may be used. For example, the above configuration may be applied to all output terminals by using two or three column drivers.

The present invention can also be applied to color display. In general, color display is possible 1
Corresponding to one pixel (usually, three RGB column electrodes are included), the output terminals of the column electrodes also continuously have RGB 3
Equipped with two output terminals for color display,
One pixel of the display element is driven. In this case, the number of color pixels in the column direction is preferably 100 or more, more preferably 120 or more.

Further, the column driver and the row driver may be integrated as one row / column driver. In the case of the row / column driver, the wiring is drawn from the central portion to the column electrode, and the wiring is drawn from the left end side and the right end side to the row electrode. In the present invention, such a form of drive IC can also be used.

The present invention can be applied to a liquid crystal display device, an organic EL device, etc., which performs simple matrix driving. In the following examples, the case of an STN liquid crystal display element will be described.

(First Embodiment) In the first embodiment, the driver IC
A third output terminal, that is, an "empty output terminal" which is not externally connected, is provided in the central portion of. As shown in FIG. 1, between the output terminal 1L of the first group located on the left side and the output terminal 1R of the second group located on the right side, the output terminal of the third group is open without wiring. 10 are arranged.

All output terminals of the first group of output terminals 1L are connected to corresponding column electrodes of the liquid crystal panel.
Further, all the output terminals of the second group of output terminals are connected to other corresponding column electrodes of the liquid crystal panel. That is, at both the output terminals of the first group and the output terminals of the second group, all the column electrodes of the liquid crystal panel are connected in a one-to-one correspondence according to their number order spatially arranged, and their wirings are connected. Are placed on the substrate.

For example, in the case of a driver IC (S6B33B0 manufactured by Samsung, which is a driver for both rows and columns, which is a driver for both rows and columns) in which the total number of output terminals corresponding to the column electrodes is 144 × 3 (RGB), the output is not connected. The number of terminals and the number of output terminals actually used are (1) 8/136, (2) 16 /
It can be set to a combination of 28 lines and (3) 24 lines / 120 lines.

(Second Embodiment) In the second embodiment, the arrangement relationship is the reverse of that of the first embodiment. S6B33 of Example 1
B0 can also be used in Example 2. As shown in FIG.
The first output terminal 1L and the second output terminal 1R are spatially continuously arranged when viewed from the position of the output terminal of the driver IC. The third output terminal 10 is spatially divided into two parts, which are respectively arranged at the left and right ends of the driver IC. The first output terminal 1L and the second output terminal 1R are sandwiched between the left third output terminal 10L and the right third output terminal 10R.

In both the first and second embodiments,
Without using all the output terminals of the driver IC, a "vacant address" that does not make a circuit connection to the outside, and the above-mentioned third terminal 10 are provided in the output terminals that are spatially continuously located. .

Then, the wiring for connecting to the liquid crystal panel can be arranged substantially in mirror symmetry on the substrate surface. Normally, the third output terminal 10 that is not connected is left open. Alternatively, a predetermined dummy load may be connected.

The driver IC 30 arranged as described above
The column data necessary for display is externally supplied as follows.

FIG. 3 shows the main part of the column side data supply circuit. RAM address conversion circuit 21, RAM management circuit 2
2, a data conversion control circuit 23, a column-direction RAM address management register 24, an arithmetic circuit 25, etc. are provided.

The column data sent from the external circuit is stored in the RAM.
It is stored in the RAM 20 via the address conversion circuit 21. At that time, allocate the address of RAM20,
The column data is not sequentially stored in a completely continuous address space, but an "empty address space 10A" is provided in the middle. For example, in FIG. 3, the hexadecimal number "0"
"1F" and "20" are vacant in the address space from "0" to "3F".

This is to prepare the "vacant address space 10A" corresponding to the third output terminal 10 of the driver IC described above. In other words, the RAM address conversion circuit 21 and the like are operated so that a preset address area is skipped in a continuous address space and column data is stored in the next address area.

According to each of the above-described first and second embodiments, the storage operation of the column data in the RAM 20 may be performed together with the control of the address of the RAM 20.

From the RAM 20 to the driver IC 30
In the connection to, the addresses of both are connected in a one-to-one correspondence, and the data in the respective address spaces of the RAM 20 are directly input to the input terminals of the driver IC in a one-to-one correspondence. Column data is sent to the liquid crystal panel from the output terminals of the first group and the output terminals of the second group.
The drive circuit shown in FIG. 3 is an example, and the design can be changed to various circuit formats including the configuration of peripheral circuits.

FIG. 7 shows an example of a table when performing frame rate control with four frames. Each value in the table is incremented by 1 for each frame as it proceeds from (1f) to (4f). It changes from 0 to 1, from 1 to 2, from 2 to 3, and from 3 to 0.

In order to show the lighting state / non-lighting state at each gradation level as a state diagram, the table value "0,
1, 2,3 "at 1/4 gray level,
“○, ×, ×, ×”, and at 2/4 gray level,
"○, ×, ○, ×", and at 3/4 gray level,
"○, ○, ○, ×".

Therefore, the display state at the 1/4 gray level is as shown in FIG. That is, only when the table value of FIG. 7 is “0”, the light is turned on. Then, in the case of frame rate control, when the frame frequency is lowered, the display screen appears to flow. If the above-mentioned third group is not installed in this table unit,
The flow method changes between the group and the second group, and the display quality is degraded. This is because, for example, the lighting dots are close to each other.

[0053]

As described above, according to the present invention, the design efficiency of products corresponding to various specifications of display elements is dramatically improved without reducing the packaging density of the wiring between the drive circuit and the display elements. Can be improved. An improvement of about 50% is obtained compared to the prior art.

Further, the mounting efficiency of the drive circuit of the display element can be improved. Further, the wiring connection with the drive circuit can be made in a short time regardless of the screen size of the display element. In addition, manufacturing is easy, and manufacturing control is easy.

Further, it becomes easy to design a new display element, and the turnaround time until a new product is completed can be drastically shortened.

[Brief description of drawings]

FIG. 1 is a schematic plan view of a first embodiment of the present invention.

FIG. 2 is a schematic plan view of a second embodiment of the present invention.

FIG. 3 is a block diagram of a drive circuit of the present invention.

FIG. 4 is a block diagram showing an internal structure of a driver IC.

FIG. 5 is a driver IC in a conventional example in the case of complete wiring.
FIG. 3 is a schematic plan view showing the connection between the liquid crystal panel and the liquid crystal panel.

FIG. 6 is a driver I in a conventional example in the case of incomplete wiring.
The typical top view showing connection of C and a liquid crystal panel.

FIG. 7 shows an example of a table when displaying is performed by a frame rate control method.

8 is a table showing lighting / non-lighting when the table of FIG. 7 is used.

[Explanation of symbols]

10: Free address space 20: RAM 21: RAM address conversion circuit 22: RAM management circuit 23: Data conversion control circuit 24: Column direction RAM address management register 25: arithmetic circuit 30: Driver IC 40: Liquid crystal panel

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 7 Identification code FI theme code (reference) G09F 9/35 G09F 9/35 5G435 G09G 3/20 611 G09G 3/20 611F 621 621M 641 641E 3/30 3 / 30 H 3/36 3/36 F term (reference) 2H092 GA05 GA06 NA25 PA06 QA10 2H093 NA55 NC29 ND50 NE03 NF13 5C006 AA14 BA12 BB12 BC02 BF02 EB05 FA42 5C080 AA06 AA10 BB05 DD23 DD27 DD28 DD30 FF10 A04A09A02 BB10 AA48 AA51 AA56 BA27 BA44 BA45 BA49 CA19 DA09 DB01 DB02 DB04 5G435 AA17 BB05 BB12 CC09 EE37 EE42 KK05

Claims (7)

[Claims]
1. A row electrode and a column electrode are arranged orthogonally, a row driver is connected to the row electrode, a column driver is connected to the column electrode, and an electro-optical layer is arranged between the row electrode and the column electrode. A drive circuit for a display element, wherein the connection between the column electrode and the output terminal of the column driver satisfies the following conditions (1), (2) and (3). (1) The column electrode is divided into a first group column electrode and a second group column electrode substantially in space arrangement, and the first group column electrodes are all continuous, and the second group column electrode is Are all continuous,
(2) The output terminals of the column driver are the first group of output terminals and the second group of output terminals.
It is divided into an output terminal of the group and an output terminal of the third group, and (3)
The first group of column electrodes and the first group of output terminals are connected in a one-to-one correspondence, the second group of column electrodes and the second group of output terminals are connected in a one-to-one correspondence, and the third group of output terminals are arranged in a column. Not connected to electrodes, first
The output terminal of the third group is arranged between the output terminal of the group and the output terminal of the second group.
2. A row electrode and a column electrode are arranged orthogonally, a row driver is connected to the row electrode, a column driver is connected to the column electrode, and an electro-optical layer is arranged between the row electrode and the column electrode. A drive circuit for a display element, wherein the connection between the column electrode and the output terminal of the column driver satisfies the following conditions (4), (5) and (6). (4) Due to the spatial arrangement of the column electrodes, the first group of column electrodes and the second group of column electrodes
The column electrodes of the group are substantially bisected, the column electrodes of the first group are all continuous, the column electrodes of the second group are all continuous, and (5) the output terminal of the column driver is the first group. Is divided into an output terminal of the second group, an output terminal of the second group, and an output terminal of the third group,
(6) The first group of column electrodes and the first group of output terminals are connected one to one, the second group of column electrodes and the second group of output terminals are connected one to one, and the third group of output The terminals are not connected to the column electrodes, and the output terminals of the third group are arranged spatially as two regions, that is, the output terminals of the third L group and the output terminals of the third R group. And a third R group of output terminals, a first output terminal and a second output terminal are arranged, and all output terminals of the first output terminal and the second output terminal are continuously arranged. .
3. A group of wirings connecting a first group of output terminals and a first group of column electrodes, and a group of wirings connecting a second group of output terminals to a second group of column electrodes. 3. The display element drive circuit according to claim 1, wherein the display element drive circuit is arranged in a mirror symmetry with a center line that substantially divides the line ???
4. A row electrode and a column electrode are arranged orthogonally, a row driver is connected to the row electrode, a column driver is connected to the column electrode, and an electro-optical layer is arranged between the row electrode and the column electrode. And a memory circuit for storing column data, wherein the column electrodes are arranged spatially and the column electrodes of the first group and the first group are arranged. Substantially bisected into two groups of column electrodes, all of the first group of column electrodes are continuous, all of the second group of column electrodes are continuous, and the column driver output terminals are of the first group of outputs. Terminals, second group output terminals, and third group output terminals, the first group column electrodes and the first group output terminals are connected in a one-to-one relationship, and the second group column electrodes and the second group column electrodes are connected. The output terminals of the third group are connected in a one-to-one relationship, the output terminals of the third group are not connected to the column electrodes, and When storing the data, the column data corresponding to the order of the column electrodes is sequentially arranged at the address of the memory circuit, and at that time, a vacant address is provided without using a part of the address, and the vacant address is set to the third address. A method for driving a display element, which is adapted to correspond to an output terminal and then send column data to a column driver.
5. A case where spatial modulation is performed by using a driving method for displaying by a frame rate control method using a plurality of frame modulations and shifting the phase of the frame rate control in units of a pixel block composed of a plurality of pixels. The method of driving a display element according to claim 4, wherein the number of output terminals of the third group is an integer multiple of the number of columns of the pixel block.
6. The method for driving a display device according to claim 4, wherein the electro-optical layer is STN liquid crystal, TN liquid crystal, or a chiral nematic liquid crystal having a phase transition type operation mode.
7. The method for driving a display element according to claim 4, wherein the electro-optical layer is an organic EL.
JP2001387491A 2001-12-20 2001-12-20 Display element drive circuit and drive method Active JP4043012B2 (en)

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Cited By (4)

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KR100816110B1 (en) 2005-06-30 2008-03-21 세이코 엡슨 가부시키가이샤 Integrated circuit device and electronic instrument
WO2009116201A1 (en) * 2008-03-21 2009-09-24 シャープ株式会社 Active matrix substrate and display device
US7663591B2 (en) 2003-11-25 2010-02-16 Sharp Kabushiki Kaisha Display device and method of driving same
US9257080B2 (en) 2012-04-23 2016-02-09 Mitsubishi Electric Corporation Display panel driving circuit and display device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7663591B2 (en) 2003-11-25 2010-02-16 Sharp Kabushiki Kaisha Display device and method of driving same
KR100816110B1 (en) 2005-06-30 2008-03-21 세이코 엡슨 가부시키가이샤 Integrated circuit device and electronic instrument
WO2009116201A1 (en) * 2008-03-21 2009-09-24 シャープ株式会社 Active matrix substrate and display device
US8432384B2 (en) 2008-03-21 2013-04-30 Sharp Kabushiki Kaisha Active matrix substrate and display device
US9257080B2 (en) 2012-04-23 2016-02-09 Mitsubishi Electric Corporation Display panel driving circuit and display device

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