JPS60170897A - Animation display unit for electrostatic type display - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Technical fields> The present invention relates to a moving image display device of an electrostatic display device.

<Prior Art> First, the principle of an electrostatic display device will be explained. When a dielectric layer is interposed between a fixed electrode and a movable electrode and a voltage ■ is applied between both electrodes, polarization occurs within the dielectric layer due to the electric field generated between the two electrodes, and attraction occurs between the fixed and movable electrodes. A force is generated, and this attractive force causes the movable electrode to be attracted to the fixed electrode, changing the state viewed from the front.

FIG. 1 shows a perspective view of an example of an electrostatic display unit, and FIG. 2 shows a cross-sectional view of the same with a voltage application circuit added.

The first and second fixed electrodes 1.2 are symmetrical with respect to the movable electrode 3 and have a flat rectangular shape as a whole. However, the cross-sectional shape of the fixing parts IA and 2A, which face each other parallel to each other, gradually approach toward the front from both sides toward the plane of symmetry to form the closest part 4, and then move away from each other in the order of Hli. Inwardly convex arcuate curved surfaces IB, 2B are formed, and tip portions IC, 2C facing each other in parallel are formed beyond these.

In addition, terminals 12 and 13 for connecting lead wires from the fixed parts IA and 2A to the rear are integrally formed.

A male spacer 5 made of an insulator, a film holder 6 made of a conductor, and a female spacer 7 made of an insulator are interposed between the fixed parts IA and 2A. A fixed part of the movable electrode 3 is sandwiched between them. Each fixed electrode is fixed by screwing in screws 8 and 9 from the outside of the fixed portions IA and 2A of the fixed electrode 1.2.

The movable electrode 3 has a core made of a thin film of a polymer such as polyester or polycarbonate, and has a structure in which a conductive material such as aluminum is deposited on both sides to make both sides mirror-finished, and the thickness is 0.006 to 0. It is about .012 fin long.

In such a movable electrode 3, the fixed part is tightly attached to the film holder 6 or adhered with a conductive adhesive, passes through the nearest part 4, and extends straight forward to form a free end. It is designed so that it can be freely adsorbed to the second fixed electrode 1°2. Further, the film boulder 6 is integrally formed with an 0111 element 14 to which a lead wire is connected.

The structure of the closest part 4 is such that a shim with a thickness of about 0.1 fin at both ends is interposed between both fixed electrodes 1 and 2 to form a slit defined by the thickness of the shim, and it is movable within the slit. Electrode 3 is passing through.

An insulating paint having a predetermined color such as white, red, blue, yellow, etc. is applied to the inside of the first fixed electrode 1, at least the inner surface in front of the nearest portion 4, to form a first dielectric layer. It consists of Similarly, the inner surface of the second fixed electrode 2 is coated with an insulating paint of a color different from that of the first fixed electrode or black, thereby forming a second dielectric 15.

When using this device, as shown in Figure 2, set up an AC (or DC) power supply 10 and a display control switch 1.
J, connect the terminal 12 of the first fixed electrode to the terminal A of the switch 11
and terminal 13 of the second fixed electrode.
is connected to the terminal B of the switch 11 and the other pole of the power source IO, and the terminal 14 of the movable electrode 3 is connected to the common contact C of the switch 11.

When the A side of the switch 11 is on, the movable electrode has the same potential as the first fixed electrode, and both poles of the power supply lO are applied between the movable electrode and the second fixed electrode, so that the movable electrode 3 is at the same potential as the first fixed electrode. Since it is attracted to the inner surface of the first fixed electrode 2 and covers its painted surface, direct light from the colored painted surface of the first fixed electrode 1 and reflected light from the surface of the movable electrode can be recognized from the front.

Next, when the B side of the switch 11 is turned on, the movable electrode becomes the same potential as the second fixed electrode, and the electric charge previously stored between the movable electrode and the second fixed electrode is discharged and the movable electrode becomes movable. The attraction force of the electrode towards the second fixed electrode disappears,
When the movable electrode begins to return to the neutral position due to its elastic force, both poles of the power source 10 are applied between it and the first fixed electrode. Therefore, direct light from the painted surface of the second fixed electrode 2 and reflected light from the surface of the movable electrode are recognized from the front when the i+J movable electrode 1 is attracted to the fixed electrode 1 .

<Object of the Invention> Therefore, an object of the present invention is to provide a moving image display device using such an electrostatic display device.

<Structure of the Invention> The moving image display device of the electrostatic display device of the present invention comprises (an Al fixed electrode, a movable electrode that can be attracted to or separated from the surface of the fixed electrode, and either the surface of the fixed electrode or the surface of the movable electrode). It has a dielectric layer provided on one or both of them, and a lead wire for applying a voltage between the fixed electrode and the movable electrode, and when the voltage is applied, the movable electrode C A display section (bl) in which a large number of electrostatic display units configured to change the appearance of the display unit 7 by being electrostatically attracted to the surface of an electrode is arranged in a plane. A display register that has bits corresponding to each display unit and is shifted column by column by a shift pulse (()) A memory that stores display pattern information for multiple frames (d) A register that has bits corresponding to each display unit and is shifted one column at a time by a shift pulse (d) A memory that stores display pattern information for multiple frames <Transfer means for transferring display information to the register (cll) The above shift pulse frequency is written in -.
(f) switching means for switching between a first frequency to which the movable electrodes of the first and second terminals cannot respond and a second frequency that is significantly lower than that frequency; It has six features because it has means for stopping the supply and is configured to display a series of moving images by sequentially changing still images.

<Description of Embodiments> FIG. 3 shows the circuit configuration of the entire device. The display section 21 includes the electrostatic display unit 20 illustrated in FIG. 1 on one panel.
A large number of dots are arranged in a matrix, and the number of units is, for example, 20×200 dots. The drive circuit g++ 22 is composed of a large number of Zyristors that correspond one-to-one with the display unit 20. The display register 23 consists of registers arranged in a matrix, shifted by the clock pulse CK, and each bit corresponds to each dot of the display unit 20. The control circuit unit 24 includes an oscillator 25 that generates a clock source oscillation CL, and divides the frequency of the clock source oscillation CL to generate a timing signal CK.
, an address counter 27 that counts the frequency-divided pulse signal CK, a control command Co, +, C2
It is comprised of a control decoder 28 that controls frequency division, and a data transfer circuit 29 that transfers display data from a storage device 30 (described later) to the display register 23 described above. The storage device 30 is composed of a RAM (random access memory), and all display data and control commands corresponding to each display data are written therein. Control commands include GO and CI for each column of the display data storage section.

C203 focus points are assigned, and various modes as shown in the following table are specified.

Figure 4 shows 1. a shows the formant of the device 30;

The RAM is a matrix type RAM having 24 bits per column, of which 4 pins are allocated to storage of control commands and the remaining 20 bits are allocated to storage of display data. In the figure, the white background represents logic "0", and the black dotted area represents logic "1".For example, the control command corresponding to the column in which display data "DAIWA" is stored is C1=1°C2= 0 and is in the 11th speed shift mode, and the control command corresponding to the column in which the next display data ``'SH[NKU'' is stored is also CI = 1. C2
=O becomes ζ. The control command corresponding to the column of the blank space immediately after the display data "DAIWA" and the column of the blank section immediately after the display data "5) IINKU" is C1=O.

C2-1 and is in stop mode.

FIG. 5 shows a circuit behind the control circuit section 24 related to a device that displays a moving image by repeating high-speed shifting and stopping.

The frequency dividing circuit 32 sequentially divides the frequency of the clock source oscillation CL of the oscillator 25. Output Q1 is the output of the first stage of frequency division, output Q9 is the output of the ninth stage, output Q12 is the output of the 12th stage, and when the frequency of the clock source oscillation CL is [0, Q
Frequency of l f□X-Q9 frequency fOX2-',Q
The frequency of 12λゝ is ro×2−''.Output Q1 is provided for high-speed shifting, output Q9 is provided for continuous display, and output Q12 is provided for stopping.NAND gate 33 is provided for C+=1°C2=0
The NAND gate 34 opens when CI=0°C2=
The NAND gate 35 opens when CI=O.

Opens when C2-1. Each NAND gate 33.34°3
The output of 5 is manually input to gate 36, and this A
The output of the ND cable 1.36 is inputted to a solver flop 37 and shaped into a pulse No. 18 having a constant time width, and is connected to the reset terminal of the frequency dividing circuit 32 through an inverter 38. Counter 27 is solid block 3
This is an address counter that increments by one based on the output Q of No.7. The 12 output terminals Q I --Q 12 can provide 2 = 4096 state outputs. Random access memory (RAM)
Address No. 30 is selected and the data stored in the memory 30 is output from the data output terminal D O--D +a.

In addition, the output Q of the flip-flop 37 outputs a shift pulse to the display register 23 via the NAND gate 39 and the transistor 40, but in the stop mode, N
The AND gate 39 is closed to prevent the shift pulse from being output to the display register.

Now, along with the display data in the memory 30, a control code C,+=1. It is assumed that C2=0 has been published. FIG. 6 shows voltage waveforms at various parts in the high-speed shift mode. NAND game 1-34.35
The output of the inverter 38 is actually "1", and the moment the output Q1 of the frequency dividing circuit 32 is reversed from L (low) to H (high), the frequency dividing circuit 32 is reset by the reset circuit of the inverter 38. Therefore, the output of the AND gate 36, ie, the input signal of the flip-flow knob 37, becomes a sharp negative pulse. Flip-flop 37 outputs a square wave that divides this negative pulse, and this output advances the address in memory 30 one by one, and in synchronization with this, the contents of display register 23 advances one row at a time. However, the frequency of this stepping pulse is, for example, 5 KHz, and the movable electrodes of the electrostatic display unit 1-20 cannot respond to this, and the previous display pattern is maintained. In this mode, the frequency divider circuit is Q1
Since the signal is always regenerated after being output, it does not proceed to the second stage or later and the output Q9°C12 is never output.

Next, the memory 30 address advances and the control command changes from high-speed shift mode to stop mode, ZunawajiC+=0. C2
=1, the NAND gate 35 is ready to open, and at this time the other NAND gates 33.
The output of the frequency divider circuit 34 becomes "1n.The output Q of the frequency divider circuit 32
I2 is output at a period 2'' = 2048 times that of output Q1. When this is output, as in the previous high-speed shift mode, as soon as the NAND gate 35 and the AND gate 36 open, the inverter 38 Since the frequency dividing circuit is reset by the seven-node circuit, AND gate 3
The output waveform of No. 6 is a sharp negative pulse. FIG. 7 shows voltage waveforms at various parts. In comparison with FIG. 6, the time axis in FIG. 7 is compressed to fluorine. The address where this static instruction code is written is, for example, 4 as shown in Figure 3.
It is an address. The time required for the counter 27 to advance through four addresses at extremely low speed is, for example, one second. During this stop time, no soft pulse is sent to the display register, and the previous high-speed shifted content, for example "DAIWA", is statically displayed.

When the control instruction code returns to high-speed shift mode, the contents of the display register change from “DAIWA” to “5HINKU”.
However, during this time, as mentioned in 7 above, the movable electrode of the electrostatic display unit cannot respond.
The display unit continues to display and spell out "1) AIWA". After entering the stop display mode after the memory address is "'S HI N K U", the movable electrode finally responds and the display content changes from "I) AIWA" to "S HI N K
U” - switch all at once.

<Effects of the Invention> According to the present invention, the response speed of the movable electrode of the electrostatic display unit is appropriately slow and cannot follow the shift of the display register in the high-speed shift mode, so the display pattern does not flicker when switching. , it is possible to perform stable frame-by-frame advance.

In addition, since the high-speed shift and standstill modes are switched by the number of frequency division stages, the circuit configuration is simplified, and the standstill time is
Since it can be set arbitrarily depending on the number of addresses having the static mode command, a moving image display with a wide variety of changes can be performed by a simple program W1.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an example of an electrostatic display unit used in the present invention, and FIG. 2 is a cross-sectional view of the same with an electric circuit added thereto. 3 is a circuit block diagram showing the overall configuration of an embodiment of the present invention, FIG. 4 is a diagram showing an example of the format of the storage device 30 shown in FIG. 3, and FIG. 5 is a diagram showing the timing generation circuit 26 shown in FIG. Circuit diagrams showing the surroundings, Figures 6 and 7
The figure is a time chart explaining the action of FIG. l, 2-fixed electrode 3-movable electrode 20-electrostatic display unit 21-display section 22-
Drive circuit 23 - Display register 27 - RAM address counter 28 - Control instruction code decoder 32 - Frequency divider circuit 33.34, 35.39 - NAND gate Patent applicant
Yamato Vacuum Industries Co., Ltd. Agent Patent Attorney Nishi Ro] Arata

Claims (1)

[Claims] A moving image display device of an electrostatic display device having the following fat to (fl) and configured to display a series of moving images by sequentially changing still images. A voltage is applied between a movable electrode that can be attracted to or separated from an electrode surface, a dielectric layer provided on either or both of the fixed electrode surface or the movable electrode surface, and the fixed electrode and the movable electrode. an electrostatic display unit, the electrostatic display unit having a lead wire for the purpose, and configured such that the movable electrode is electrostatically attracted to the surface of the fixed electrode by application of the voltage, thereby changing the appearance of the display unit. A display register (C1 stores display information for a plurality of frames) whose focus corresponding to each of the 1161 display units of the display unit is shifted one column at a time by a shift pulse. memory(
dll Transfer means for transferring display information from the memory to the display register using the shift pulse (el) The frequency of the shift pulse is set to a first frequency to which the movable electrode of the electrostatic display unit cannot respond and its frequency. switching means for switching to a second frequency much lower than fl (means for stopping supply of shift pulses to the display unit when the second frequency is selected);