JP2002014624A - Liquid crystal display medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flexible liquid crystal display medium of a thin type. SOLUTION: This liquid crystal display medium has lower and upper substrates 10 and 8 having flexibility, plural scanning electrodes 18 and signal electrodes 16 which are respectively disposed on the lower and upper substrate 10 and 8 sides, liquid crystals which are interposed between the electrodes 16 and 18 and scanning and signal electrode driving ICs 22 and 20 which respectively impress prescribed voltages to the scanning and signal electrodes 18 and 16. The scanning electrode driving IC 22 consists of plural first driver chips 24R disposed on lower substrate extension parts 25 arranged near one end of the plural scanning electrodes 18. The respective first driver chips 24R impress the prescribed voltages to the corresponding scanning electrodes 18. The signal electrode driving IC 20 consists of plural second driver chips 24C disposed on upper substrate extension parts 23 arranged near one end of the plural signal electrodes 16 and the respective second driver chips 24C impress the prescribed voltages to the corresponding signal electrodes 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rewritable liquid crystal display medium.

[0002]

2. Description of the Related Art There has been proposed a liquid crystal display device using a liquid crystal having memory properties (for example, cholesteric liquid crystal) capable of holding an image even when power is not supplied. This liquid crystal display device has a plurality of scanning and signal electrodes crossing each other and a liquid crystal layer sandwiched between the scanning and signal electrodes. The liquid crystal display device also incorporates a driving IC for taking in an image writing signal from the outside and applying a voltage to the scanning electrode and the signal electrode at a predetermined timing. The image writing is performed based on a signal transmitted from a control circuit of the image writing device to the driving IC in a state where the driving IC and the image writing device (external device) are electrically connected to each other. This is performed by applying a predetermined voltage to the electrodes to change the state of the liquid crystal located at the intersection of these scanning electrodes and signal electrodes. More specifically, for a scanning electrode and a signal electrode that are arranged to face each other at 90 degrees, for example, a plurality of signals facing the scanning electrode in a state where a selection voltage is applied to one of the scanning electrodes. By applying a voltage to all or some of the electrodes among the electrodes simultaneously or sequentially, the state of the liquid crystal disposed between the scanning electrodes and the signal electrodes is changed. By sequentially performing the above method on each scanning electrode, a voltage is sequentially applied to the liquid crystal in a matrix form, and image writing is performed.

[0003]

As one application of such a liquid crystal display device having a memory property, the present inventors have proposed:
We are studying flexible and thin liquid crystal display media that can be electrically rewritten. However, a drive IC incorporated in a liquid crystal display medium usually has many circuits such as a shift register, a latch, a decoder, and a high-voltage driver, so that the space occupied by the drive IC itself increases. Moreover, since the driving IC itself does not have flexibility, the liquid crystal display medium cannot be made flexible and thin.

Further, in the case of a liquid crystal display medium using a liquid crystal, such as a cholesteric liquid crystal, whose display contents are retained once displayed, it is possible to carry the liquid crystal display medium separately from an external device. However, in the case where the liquid crystal display medium is separated, the number of connection terminals becomes a problem. In other words, a drive signal is required for each scan electrode and signal electrode. However, when those drive signals are individually supplied from an external device, connection terminals provided on the liquid crystal display medium are required for the number of scan electrodes and the number of signal electrodes. The number of terminals becomes huge. In that case, the connector portion becomes large, and it becomes difficult to carry the liquid crystal display medium when it is separated,
Connection work is also troublesome.

Accordingly, a first object of the present invention is to provide a driving IC
Is reduced as much as possible to reduce the driving I
An object of the present invention is to provide a liquid crystal display medium in which a region where C is disposed has flexibility.

A second object of the present invention is to propose a configuration in which the liquid crystal display medium can be separated from an external device and the number of connection terminals can be reduced.

[0007]

In order to achieve this object, a liquid crystal display medium according to claim 1 comprises a flexible upper substrate and a lower substrate which face each other at a predetermined interval, and
A plurality of scan electrodes provided on one substrate and arranged in parallel at a predetermined interval, and a plurality of scan electrodes provided on the other substrate and intersecting the scan electrodes and arranged in parallel at a predetermined interval A signal electrode; a liquid crystal interposed between the scan electrode and the signal electrode; a scan electrode drive IC for applying a predetermined voltage to the scan electrode; and a signal electrode drive IC for applying a predetermined voltage to the signal electrode. In a liquid crystal display medium driven in a matrix by a plurality of scanning electrodes and a plurality of signal electrodes, the scanning electrode driving IC is provided near a first end of the plurality of scanning electrodes and provided on a flexible first substrate. A plurality of first driver chips, each of the first driver chips,
A predetermined voltage is applied to the corresponding scanning electrode, and the signal electrode driving IC is arranged near one end of the plurality of signal electrodes and provided on the flexible second substrate with a plurality of second drivers Each second driver chip applies a predetermined voltage to a corresponding signal electrode.

The liquid crystal display medium according to the second aspect is the first aspect.
Wherein the first substrate is an extension of the lower substrate and / or the second substrate is an extension of the upper substrate.

A liquid crystal display medium according to a third aspect is the first aspect.
In each of the liquid crystal display media, each of the first driver chip and each of the second driver chips has a switch and a flip-flop, and when the switch is turned on, the first driver chip and the second driver chip correspond to each other based on a driving signal input from the outside. A predetermined voltage is applied to the scanning electrode and the signal electrode, and the flip-flop of each first driver chip synchronizes a selection signal for selecting a scanning electrode to which a voltage is applied with a first clock,
The signal is output to the switch of the first driver chip and transferred to the flip-flop of the adjacent first driver chip, and the flip-flop of each second driver chip selects a signal electrode to which a voltage is applied. A selection signal is output to a switch of the second driver chip in synchronization with a second clock, and is transferred to a flip-flop of a second driver chip disposed adjacently.

According to a fourth aspect of the present invention, there is provided a liquid crystal display medium which is provided on one of a flexible upper substrate and a lower substrate which are opposed to each other at a predetermined interval, and are arranged in parallel at a predetermined interval. A plurality of arranged scanning electrodes and a plurality of signal electrodes provided on the other substrate, intersecting with the scanning electrodes, and arranged in parallel at a predetermined interval, and sandwiched between the scanning electrodes and the signal electrodes. A liquid crystal, a scan electrode driving IC for applying a predetermined voltage to the scanning electrodes, and a signal electrode driving IC for applying a predetermined voltage to the signal electrodes, and the plurality of scanning electrodes and the plurality of signal electrodes drive the matrix. Liquid crystal display medium,
Each of the scan electrode driver IC and the signal electrode driver IC is a circuit made of an organic semiconductor, which is disposed on one of the plurality of scan electrodes and the plurality of signal electrodes near one end and provided on a flexible substrate. Is what you do.

A liquid crystal display medium according to a fifth aspect is provided on one of a flexible upper substrate and a lower substrate facing each other at a predetermined interval, and is provided in parallel at a predetermined interval. A plurality of arranged scanning electrodes and a plurality of signal electrodes provided on the other substrate, intersecting with the scanning electrodes, and arranged in parallel at a predetermined interval, and sandwiched between the scanning electrodes and the signal electrodes. A liquid crystal, a scan electrode driving IC for applying a predetermined voltage to the scanning electrodes, and a signal electrode driving IC for applying a predetermined voltage to the signal electrodes, and the plurality of scanning electrodes and the plurality of signal electrodes drive the matrix. Liquid crystal display medium,
Each of the scan electrode drive IC and the signal electrode drive IC is a TFT circuit formed on a stainless steel thin plate, which is disposed near one end of each of the plurality of scan electrodes and the plurality of signal electrodes and provided on a flexible substrate. It is characterized by the following.

The liquid crystal display medium according to the sixth aspect is the fourth aspect.
Or the liquid crystal display medium according to 5, wherein the scan electrode driving IC
Each of the signal electrode drive ICs has a plurality of switches provided corresponding to each scan electrode and each signal electrode, and a shift register, and when the switches are on, based on a drive signal input from the outside. A predetermined voltage is applied to each scan electrode and signal electrode, and the shift register of each scan electrode driving IC sequentially transfers a selection signal for selecting a scan electrode to which a voltage is applied in synchronization with the first clock. And a shift register of each signal electrode drive IC sequentially transfers a selection signal for selecting a signal electrode to which a voltage is applied in synchronization with a second clock, and outputs each signal. The signal is output to a switch corresponding to the electrode.

A liquid crystal display medium according to claim 7 is provided on one of a flexible upper substrate and a lower substrate facing each other at a predetermined interval, and is provided in parallel at a predetermined interval. A plurality of arranged scanning electrodes and a plurality of signal electrodes provided on the other substrate, intersecting with the scanning electrodes, and arranged in parallel at a predetermined interval, and between the scanning electrodes and the signal electrodes A liquid crystal interposed therebetween, a scan electrode drive IC for applying a predetermined voltage to the scan electrode, and a signal electrode drive IC for applying a predetermined voltage to the signal electrode, wherein the plurality of scan electrodes and the plurality of signal electrodes are provided. A liquid crystal display medium which is driven in a matrix by a scanning electrode driving IC having at least an input terminal for inputting a driving signal and a selection signal from an external device.
Has a plurality of switches provided between a drive signal input terminal and each scan electrode, and a control circuit for supplying a drive signal to the scan electrodes by sequentially turning on the switches in accordance with the selection signal. It is characterized by the following.

The liquid crystal display medium according to claim 8 is the liquid crystal display medium according to claim 7.
In the liquid crystal display medium of the above, the control circuit is constituted by a shift register connected to the plurality of switches, and by sequentially inputting the selection signals to the shift register and sequentially transferring the selection signals, the switches are sequentially turned on, and the drive signal Is supplied to the scanning electrodes.

In the liquid crystal display medium according to the ninth aspect, a flexible upper substrate and a lower substrate facing each other at a predetermined interval are provided on one of the substrates, and are arranged in parallel at a predetermined interval. A plurality of arranged scanning electrodes and a plurality of signal electrodes provided on the other substrate, intersecting with the scanning electrodes, and arranged in parallel at a predetermined interval, and between the scanning electrodes and the signal electrodes A liquid crystal interposed therebetween, a scan electrode drive IC for applying a predetermined voltage to the scan electrode, and a signal electrode drive IC for applying a predetermined voltage to the signal electrode, wherein the plurality of scan electrodes and the plurality of signal electrodes are provided. A liquid crystal display medium which is driven in a matrix in the above-mentioned manner, having at least an input terminal for inputting a drive signal and a selection signal from an external device; The switch When, in response to the selection signal, and characterized by a control circuit for supplying a drive signal to the signal electrodes by setting the states of the switches.

According to a tenth aspect of the present invention, in the liquid crystal display medium of the ninth aspect, the control circuit includes a shift register connected to the plurality of switches, and inputs the selection signal to the shift register. The display data is held in the shift register by sequentially transferring the data, the state of each switch is controlled according to the data held in the shift register, and a drive signal is supplied to each signal electrode. is there.

[0017]

Embodiments of the present invention will be described below with reference to the accompanying drawings. In the following description, in order to facilitate understanding of the invention, terms indicating directions (for example,
“Top,” “bottom,” “right,” “left,” and other terms that include these are used as appropriate, but the scope of the present invention is not limited by these terms.

(1) First Embodiment FIG. 1 is a sectional view of a liquid crystal display medium according to the present invention. As shown in this figure, the liquid crystal display medium has a liquid crystal panel 2. The liquid crystal panel 2 has a light absorption layer 4 and three color display layers 6 (red display layer 6R, green display layer 6G, and blue display layer 6B) stacked on the light absorption layer 4.

Each of the color display layers 6 includes a film-shaped upper substrate 8 and a lower substrate 10 made of a transparent material,
Structure 12 for adhesively supporting the lower substrate 10 and the lower substrate 10
And a liquid crystal 14 filled in a gap formed by the resin structure 12. Although not shown, spherical spacers are also included between the upper and lower substrates. Also,
On the lower surface of the upper substrate 8, a plurality (n in this embodiment) of transparent band-like upper electrodes (signal electrodes) 16 are arranged in parallel at a predetermined interval. On the other hand, on the upper surface of the lower substrate 10, a plurality (m in this embodiment) of transparent strip-shaped lower electrodes (scanning electrodes) 18 are arranged in parallel at a predetermined interval. The arrangement direction of the upper electrode 16 and the lower electrode 18 is orthogonal to each other, and a point (intersection) at which the upper electrode 16 and the lower electrode 18 face each other forms a pixel of the liquid crystal display medium.

As the liquid crystal 14 of each color display layer 6, a cholesteric liquid crystal having a selective reflection wavelength in the visible region is used. In the present embodiment, a liquid crystal that selectively reflects blue is used for the display layer 6R on the observer side, and a liquid crystal that selectively reflects green is used for the next display layer 6G.
For B, a liquid crystal that selectively reflects red is used. Note that, in two display layers adjacent to each other, one substrate may be used as the upper substrate and the lower substrate.
In this case, the number of substrates can be reduced, so that display quality can be improved.

Each color display layer 6 includes a liquid crystal 14 of the display layer 6.
In response to a voltage applied between the signal electrode 16 and the scanning electrode 18 sandwiching the pixel, from a transparent state transmitting visible light to a selective reflection state selectively reflecting visible light of a specific wavelength, or conversely, The state is switched from the selective reflection state to the transparent state.
Therefore, when the specific color display layer 6 is set to the selective reflection state, and the liquid crystal panel 2 is irradiated with white light such as natural light from above in FIG. 1, the color display layer 6 in the selective reflection state reflects visible light of a specific wavelength. This is observed as an indication of each color. When the color display layer 6 is in a transparent state, incident light passes through the color display layer 6. For this reason, the color display layer 6 corresponding to the color to be displayed is set to the selective reflection state, and at least the color display layer 6 closer to the observer than the color display layer 6 is set to the transparent state, so that the desired color can be obtained. Display can be performed. If all the color display layers 6 are in a transparent state, incident light is absorbed by the light absorbing layer 4 to display black. The method of applying the voltage applied between the signal electrode 16 and the scanning electrode 18 will be described later in detail.

As the cholesteric liquid crystal contained in each color display layer 6, a liquid crystal material containing a cholesteric liquid crystal which itself exhibits a cholesteric phase at room temperature, a liquid crystal material obtained by adding a chiral material to a nematic liquid crystal, or the like can be used. In these cholesteric liquid crystals, a planar state is selected when a relatively high energy pulse voltage is applied, and a focal conic state is selected when a relatively low energy pulse voltage is applied. When an intermediate voltage pulse is applied, a state in which the planar state and the focal conic state are mixed is selected. When the cholesteric liquid crystal is in the planar state, the helical pitch of the liquid crystal is P,
Assuming that the average refractive index of the liquid crystal is n, light of wavelength λ = P · n is selectively reflected by the liquid crystal. When the cholesteric liquid crystal is in the focal conic state, the visible light is scattered when the selective reflection wavelength of the liquid crystal is in the infrared region, and when the selective reflection wavelength is shorter than that, the scattering is weakened and the visible light is transmitted. You. If the cholesteric liquid crystal is in a state where the planar state and the focal conic state are mixed, a halftone is displayed. Therefore, by setting the selective reflection wavelength to visible light and providing the light absorbing layer 4 on the side opposite to the viewing side of the liquid crystal panel 2, a specific color (planar state), black (focal conic state), and its halftone are obtained. The display can be switched with.

Thus, for example, the blue display layer 6B and the green display layer 6G are set to a transparent state in which the cholesteric liquid crystal material is in a focal conic state, and the red display layer 6R is set to a selective reflection state in which the cholesteric liquid crystal is in a planar state. Thus, a red display can be performed. Further, the blue display layer 6B is set in a transparent state in which the cholesteric liquid crystal material is in a focal conic state, and the green display layer 6B is formed.
By setting the G and red display layers 6R in a selective reflection state in which the cholesteric liquid crystal is in a planar state, yellow display can be performed. Similarly, red, green, blue, white, cyan, magenta, yellow, and black can be displayed by appropriately selecting the state of each color display layer 6 between a transparent state and a selective reflection state. Further, by selecting an intermediate selective reflection state as the state of each color display layer 6, an intermediate color is displayed, and a full-color display can be performed. Each of the above states (focal conic state, planar state, intermediate state)
Can maintain that state even after application of the pulse voltage (that is, it has a memory property).

As shown in FIG. 2, a signal electrode driving IC 20 and a scanning electrode driving IC 22 are provided in each color display layer 6, and the signal electrodes 16 (16 from the left side in the drawing) of each color display layer 6 are provided.
(1), 16 (2), ..., 16 (n). ) And the scanning electrode 18 (referred to as 18 (1), 18 (2),..., 18 (m) from the upper side of the drawing) respectively correspond to the corresponding signal electrode driving IC 20 and scanning electrode driving IC.
22. More specifically, the signal electrode drive I
A plurality of C20s (n in the present embodiment) are provided on the extension 23 of the film substrate (upper substrate) 8 disposed along one end (the lower end in FIG. 2) of the signal electrode 16 at a predetermined interval. ) Driver chip 24C (24C (1), 2 from left side of drawing)
Call them 4C (2), ..., 24C (n). ), The output terminal of each driver chip 24C (x) is connected to the adjacent signal electrode 16
(X) (x = 1, 2,... N). Similarly, the scan electrode driving IC 22 is connected to a film substrate (lower substrate) 10 arranged along one end (the left end in FIG. 2) of the scan electrode 18.
, 24R (2),..., 24R (m) from a plurality of (m in the present embodiment) driver chips 24R provided at predetermined intervals on ).)
The output terminal of each driver chip 24R (x) is connected to the adjacent scan electrode 18 (x) (x = 1, 2,..., M). Note that the liquid crystal panel 2 shown in FIG. 1 has three display layers 6, and therefore, the signal and scan electrode driving ICs 20, 2
The extension portions 23 and 25 of the film substrates 8 and 10 provided with 2 respectively are provided on each display layer 6 one by one. That is, three extension parts 23 and 25 are provided on one end side of the signal electrode 16 and one end side of the scanning electrode 18, respectively.

By the way, conventionally, each of the signal electrode driving IC and the scanning electrode driving IC is composed of one driving IC. Therefore, even if the liquid crystal panel is configured to have flexibility, the driving IC is not used. The placed part could not be freely bent. On the other hand, in the present invention, the driver chips 24C and 24R are chips having a side of several hundred μm (for example, Alien's FSA (fluidic Self-Assemem).
bly) Fabricated by technology. Therefore, the liquid crystal panel 6 having the film-shaped upper and lower substrates 8 and 10, the film substrate 23 on which the signal electrode driving IC 20 is disposed, and the film substrate on which the scanning electrode driving circuit 25 is disposed The entire liquid crystal display medium composed of 25 has flexibility and can be bent.

Each driver chip 24C of the signal electrode driving IC 20 comprises an analog switch 30C and a D flip-flop (abbreviated as DFF) 32C.
A signal electrode (hereinafter, referred to as a column side) drive signal 34C transmitted from the external writing device 33 to the signal electrode drive IC 20 of the liquid crystal display medium via the connection terminal 35C and the signal electrode 16 to which a voltage is applied are selected. Electrode 1 connected to the output terminal of each driver chip 24C according to the column-side selection signal 36C and the column-side clock 38C.
6, a predetermined voltage is applied. The drive signal 34C is simultaneously input to all the driver chips 24C. The selection signal 36C is configured to be input to the leftmost (first column) driver chip 24C (1). The D flip-flop 32C constitutes a shift register as a whole, and the driver chip 24C
(X) (x = 1, 2,..., N−1)
In synchronization with the clock signal, the adjacent driver chip 24C
(X + 1) and the driver chip 24
The C (x) analog switch 30C is turned on / off. The analog switch 30C of the driver chip 24C (x) is turned on when the driver chip 24C (x) is turned on.
When the signal output from C (x) is “HIGH”,
At this time, based on the drive signal 34C, the signal electrode 16
A predetermined voltage is applied to (x).

Similarly, each driver chip 24R of the scan electrode driving IC 22 is composed of an analog switch 30R and a D flip-flop 32R, and is driven by an external writing device 33 via a connection terminal 35R to drive the scan electrode of the liquid crystal display medium. Each driver is transmitted to the IC 22 in accordance with a scan electrode (hereinafter referred to as “row side”) drive signal 34R, a row side selection signal 36R for selecting the scan electrode 18 to which a voltage is applied, and a row side clock 38R. Tip 24R
A predetermined voltage is applied to the scanning electrode 18 connected to the output terminal of the first embodiment. The operation of the scan electrode drive IC 22 is substantially the same as the operation of the signal electrode drive IC 20 and will not be repeated here, and will be described in a specific example of a drive method described below.

In the present invention, the terminals for connecting the signal electrode drive IC 20 and the scan electrode drive IC 22 to the outside are respectively:
There are five terminals: a drive signal, a selection signal, a clock, a power supply, and a ground terminal.

Next, an example of a method of driving the liquid crystal display medium will be described with reference to FIGS.
Note that, for simplicity of description, the color display layer 6 has three scanning electrodes 18 and three signal electrodes 16.
In the following description, row 1, row 2, row 3
Represents the first, second, and third columns from the upper side with respect to the scanning electrode 18 and the driver chip 24R as shown in FIG.
And the first, second, and third rows from the left with respect to the driver chip 24C.

(Row 1) First, the liquid crystal display medium is connected to the external writing device 33, and the row-side selection signal 36R is set to "LO".
In the state set to “W”, the row-side clocks 38 are input for the number of scan electrodes (three), and all the driver chips 24R
D flip-flop 32R of (24R (1), 24R (2), 24R (3))
Clear the data in.

Next, the selection signal 36R is set to "HIGH" and one clock 38R is input [FIG. 3 (a),
(B)]. At this time, the row 1 D flip-flop 32
The signal output from R becomes "HIGH", and this state is maintained until the second clock 38R is input, that is, until one frame period T ends [FIG.
(C)]. During the frame period T, the analog switch 30R of row 1 is turned on, and the scanning electrode 18 (1) of row 1 is turned on based on the drive signal 34R [FIG. 3 (f)]. Are applied. The row-side drive signal 34R and the column-side drive signal 34C [FIG.
(A)] is described in detail in Japanese Patent Application No. 2000-039521 filed by the present applicant.

FIG. 3 (g) is applied to the scanning electrode 18 (1) of the row 1.
Display data is input to the column while the voltage shown in FIG. That is, first, the column-side selection signal 36C is set to "
HIGH ”(FIG. 4 (c)). In this state, when one column-side clock 38C is input [FIG. 4 (b)],
The signal output from the D flip-flop 32C of column 1 becomes “HIGH”, and this state is maintained until the second clock 38C is input [FIG. 4 (d)].
Subsequently, the selection signal 36C is set to “LOW” [FIG.
(C)], when one more column-side clock 38C is input in this state [FIG. 4 (b)], the signal output from the D flip-flop 32C of column 1 becomes “LOW” and [FIG. 4 (d)]. ], The data of the D flip-flop 32C of the column 1 is
2C and the D flip-flop 32C of column 2
4 becomes "HIGH" [FIG.
(E)]. Similarly, the D flip-flop 32 in column 2
When the third clock 38C is input [FIG. 4B], the data of C is supplied to the D flip-flop 32
C, and the signal output from the D flip-flop 32C of column 3 becomes “HIGH” [FIG.
(F)]. As described above, the column-side selection signal 36C is synchronized with the clock 38C, and the D flip-flop 3
2C. When the fourth clock 38C is input [FIG. 4 (b)], focusing on the third column, only the signal output from the D flip-flop 32C of column 2 becomes “HIGH” [FIG. (E),
(F)], the analog switch 30C of the column 2 is turned on. In this way, one line of display data is input.
Thereafter, when the column-side drive signal 34C is transmitted [FIG.
(A)], a predetermined voltage is applied to the signal electrode 16 (2) of the column 2 [FIG. 4 (i)].

(Row 2) Next, a second row-side clock 38R is input [FIG. 3 (a)]. At this time, the data of the row 1 D flip-flop 32R is transferred to the row 2 D flip-flop 32R, and the signal output from the row 2 D flip-flop 32R becomes “HIGH”.
As a result, the analog switch 30R of the row 2 is turned on, and the scan electrode 18 (2) of the row 2 outputs the drive signal 34R.
The voltage shown in FIG. 3 (h) is applied based on [FIG. 3 (f)]. While the scan electrode 18 (2) of the row 2 is being applied, this time when the signals output from the D flip-flops 32C of the columns 1 and 3 are “HIGH” [FIGS. 4 (d) and (f). ], And a predetermined voltage is applied to the signal electrodes 16 (1) and 16 (3) of the columns 1 and 3 by transmitting the column-side drive signal 34C [FIG. 4 (a)] [FIG. ), (J)].

(Row 3) Finally, the scanning electrode 18 of row 3
The same voltage application operation is performed for (3), and the image writing ends.

(Second Embodiment) As shown in FIG. 5, the entirety of the signal electrode drive IC and the scan electrode drive ICs 20 'and 22' is formed by a circuit using an organic semiconductor (a semiconductor circuit comprising a switching element and a shift register). With the configuration described above, the entire liquid crystal display medium can be made flexible.

(Third Embodiment) As a whole, a signal electrode driving IC and a scanning electrode driving IC are formed by using a TF including a switching element and a shift register by using a known semiconductor technology.
The T circuit is made of thin film stainless steel (for example, 0.1 m thick)
m), the entire liquid crystal display medium can have flexibility.

[0037]

According to the present invention, a flexible and thin liquid crystal display medium can be provided by arranging a portion where a driving IC for driving a signal electrode and a scanning electrode is conventionally mounted to have flexibility. Can be provided.

[Brief description of the drawings]

FIG. 1 is a detailed cross-sectional view of a liquid crystal panel.

FIG. 2 is a block diagram of a signal electrode and a scan electrode drive IC of each color display layer in the first embodiment of the liquid crystal display medium, and a top view showing a positional relationship between the signal electrode and the scan electrode drive IC and the liquid crystal panel. FIG.

FIG. 3 shows a clock on the row side of each color display layer, a selection signal,
FIG. 4 is a diagram illustrating a relationship between an output signal of a DFF, a drive signal, and a voltage applied to a scan electrode.

FIG. 4 is a diagram showing a relationship among a column-side drive signal, a clock, a selection signal, a DFF output signal, a signal electrode applied voltage, and a row-side drive signal of each color display layer.

FIG. 5 is a block diagram of a signal electrode and a scanning electrode driving IC of each color display layer in the second embodiment of the liquid crystal display medium, and a top view showing a positional relationship between the signal electrode and the scanning electrode driving IC and the liquid crystal panel. FIG.

[Explanation of symbols]

2: liquid crystal panel, color display layer 6 (red display layer 6R, green display layer 6G, blue display layer 6B), 8: upper film substrate,
10: lower film substrate, 14: liquid crystal, 16: signal electrode, 18: scanning electrode, 20: signal electrode driving IC, 22:
Scanning electrode drive circuit, 23: extension of upper film substrate,
24C: Signal electrode drive IC, 24R: Scan electrode drive I
C, 25: extension of lower film substrate, 30R, 30
C: analog switch, 32R, 32C: D flip-flop.

Continued on the front page F-term (reference) 2H092 GA60 JA24 PA01 2H093 NA16 NA43 NA62 NC16 NC22 ND17 ND42 NE01 5C006 AC15 BA11 BB11 BC03 BC11 BC20 BF03 BF06 FA41 FA43 5C080 AA10 BB05 DD22 DD25 JJ02 JJ04 JJ06 KK05 EE04 KK04

Claims (10)

[Claims] A flexible upper substrate and a lower substrate facing each other at a predetermined interval; and a plurality of scanning electrodes provided on one of the substrates and arranged in parallel at a predetermined interval. A plurality of signal electrodes provided on the other substrate, intersecting the scanning electrodes, and arranged in parallel at a predetermined interval; a liquid crystal sandwiched between the scanning electrodes; and a scanning electrode. And a signal electrode driving IC for applying a predetermined voltage to the signal electrodes, wherein the plurality of scanning electrodes and the plurality of signal electrodes drive a matrix. The scan electrode driving IC includes a plurality of first driver chips arranged on one end of the plurality of scan electrodes and provided on a flexible first substrate, and each first driver chip includes: Prescribed for the corresponding scanning electrode The signal electrode driving IC is composed of a plurality of second driver chips disposed near one ends of the plurality of signal electrodes and provided on a flexible second substrate. 2. The liquid crystal display medium according to 2, wherein the driver chip applies a predetermined voltage to a corresponding signal electrode. 2. The liquid crystal display medium according to claim 1, wherein the first substrate is an extension of the lower substrate, and / or the second substrate is an extension of the upper substrate. . 3. The first driver chip and the second driver chip.
Each of the driver chips has a switch and a flip-flop. When the switch is on, a predetermined voltage is applied to the corresponding scan electrode and signal electrode based on a drive signal input from the outside, The flip-flop of the driver chip outputs a selection signal for selecting a scan electrode to which a voltage is applied to a switch of the first driver chip in synchronization with a first clock, and a first driver arranged adjacently. The flip-flop of each second driver chip transfers a selection signal for selecting a signal electrode to which a voltage is applied to a flip-flop of the second driver chip in synchronization with a second clock. And transferring the signal to a flip-flop of a second driver chip disposed adjacently. 1 of a liquid crystal display medium. 4. A flexible upper substrate and lower substrate facing each other at a predetermined interval, and a plurality of scanning electrodes provided on one of the substrates and arranged in parallel at a predetermined interval. A plurality of signal electrodes provided on the other substrate, intersecting the scanning electrodes, and arranged in parallel at a predetermined interval; a liquid crystal sandwiched between the scanning electrodes; and a scanning electrode. And a signal electrode driving IC for applying a predetermined voltage to the signal electrodes, wherein the plurality of scanning electrodes and the plurality of signal electrodes drive a matrix. The scan electrode driver IC and the signal electrode driver IC are circuits each formed of an organic semiconductor and provided on a substrate having flexibility and disposed near one end of the plurality of scan electrodes and the plurality of signal electrodes. Liquid crystal Display medium. 5. A flexible upper substrate and lower substrate facing each other at a predetermined interval, and a plurality of scanning electrodes provided on one of the substrates and arranged in parallel at a predetermined interval. A plurality of signal electrodes provided on the other substrate, intersecting the scanning electrodes, and arranged in parallel at a predetermined interval; a liquid crystal sandwiched between the scanning electrodes; and a scanning electrode. And a signal electrode driving IC for applying a predetermined voltage to the signal electrodes, wherein the plurality of scanning electrodes and the plurality of signal electrodes drive a matrix. The scan electrode drive IC and the signal electrode drive IC are TFT circuits formed on a stainless steel thin plate, which are arranged on one end of each of the plurality of scan electrodes and the plurality of signal electrodes and provided on a flexible substrate. That Characteristic liquid crystal display medium. 6. The scan electrode drive IC and the signal electrode drive IC each include a plurality of switches provided corresponding to each scan electrode and each signal electrode, and a shift register. A predetermined voltage is applied to each scan electrode and signal electrode based on a drive signal input from the outside, and the shift register of each scan electrode drive IC transmits a selection signal for selecting a scan electrode to which a voltage is applied to a first signal. In synchronization with the clock, the signals are sequentially transferred and output to the switches corresponding to the respective scan electrodes. The shift register of each signal electrode drive IC converts the selection signal for selecting the signal electrode to which the voltage is applied to the second clock. 6. The liquid crystal display medium according to claim 4, wherein the liquid crystal display medium is sequentially transferred in synchronization and output to a switch corresponding to each signal electrode. 7. A flexible upper substrate and lower substrate facing each other at a predetermined interval, and a plurality of scanning electrodes provided on one of the substrates and arranged in parallel at a predetermined interval. A plurality of signal electrodes provided on the other substrate, intersecting the scanning electrodes, and arranged in parallel at a predetermined interval; a liquid crystal sandwiched between the scanning electrodes; and a scanning electrode. And a signal electrode driving IC for applying a predetermined voltage to the signal electrodes, wherein the plurality of scanning electrodes and the plurality of signal electrodes drive a matrix. An input terminal for inputting at least a drive signal and a selection signal from an external device, the scan electrode drive IC includes: a plurality of switches provided between the drive signal input terminal and each scan electrode; Accordingly, on And a control circuit for supplying a drive signal to the scan electrode by sequentially turning on the switches. 8. The control circuit includes a shift register connected to the plurality of switches. The control circuit inputs the selection signal to the shift register and sequentially transfers the selection signal to sequentially turn on the switches, and The liquid crystal display medium according to claim 7, wherein the liquid crystal display medium is supplied to a scanning electrode. 9. A flexible upper substrate and lower substrate facing each other at a predetermined interval, and a plurality of scanning electrodes provided on one of the substrates and arranged in parallel at a predetermined interval. A plurality of signal electrodes provided on the other substrate, intersecting the scanning electrodes, and arranged in parallel at a predetermined interval; a liquid crystal sandwiched between the scanning electrodes; and a scanning electrode. And a signal electrode driving IC for applying a predetermined voltage to the signal electrodes, wherein the plurality of scanning electrodes and the plurality of signal electrodes drive a matrix. An input terminal for inputting at least a drive signal and a selection signal from an external device; the signal electrode drive IC includes a plurality of switches provided between the drive signal input terminal and each signal electrode; Accordingly, on A liquid crystal display medium having a control circuit for supplying a drive signal to each signal electrode by setting the state of each switch. 10. The control circuit includes a shift register connected to the plurality of switches. The control circuit inputs the selection signal to the shift register and sequentially transfers the selection signal to hold display data in the shift register. 10. The liquid crystal display medium according to claim 9, wherein the state of each switch is controlled according to the data held in the register, and a drive signal is supplied to each signal electrode.