JPS5987495A - Driver for electrochromic display element - 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 Field of the Invention The present invention relates to an electrochromic display device (hereinafter abbreviated as ECD) drive device using a battery as a power source.

Problems with purchasing the conventional example Generally, the ECD drive device is ECD3 as shown in Figure 1.
The control circuit 1 can be broadly divided into a drive circuit 2 for displaying the ROD and a control circuit 1 for controlling the drive circuit. (74 have been created. In this way, ECD
The driving device has a common power source that operates the circuit 2 that drives the ECD and the control circuit 1 that controls this circuit.
! used. That is, the same battery T was used as a power source.

If the power consumption of the control circuit and the drive circuit are the same, the circuit operation cut-off voltage will be equal to V for both the control circuit and the drive circuit at the end of the battery discharge, so even with the conventional drive device, effective use of the battery cannot be achieved. In this respect, no particular problem arises. However, when driving an ECD display, the voltage is about 10.
Although it operates in the voltage range of 6 to ±1.6V, the amount of electricity consumed during - times display is smaller than the unit display area Ct:! ') is required at approximately 3 to 1 o mC/cfr. Therefore, in an ECD drive device, the power consumption Q dimension of the control circuit system and the drive circuit system is generally larger in the drive circuit system, and the voltage drop of the power supply battery is dominated by the drive circuit system.
Even if the CD can be driven in a low voltage range of about 10.6 to ±1.6 µm, the circuit stops operating and the voltage at I is high, so this voltage is sufficient to power the power supply.

One of the fathers of ``V'' became the ``skin''. Furthermore, when the battery is replaced, there is a drawback that the information that the inhibiting circuit was holding before the battery was replaced is lost as a result of the inhibiting circuit being stopped. Moreover, the batteries used are mainly expensive batteries (for example, silver oxide batteries) that exhibit flat discharge characteristics in a high voltage range.

OBJECTS OF THE INVENTION It is an object of the present invention to provide an ECD drive device that efficiently utilizes power batteries for gcn'ff operation, diversifies the types of batteries used, and prevents information loss when replacing batteries. It is in.

Structure of the Invention The present invention provides an ECD drive device using a battery as a power source,
The ECD drive circuit and the power supply for the control circuit that controls the drive circuit are configured separately, and the capacity of the type 11 battery for the drive circuit and the battery for the control circuit is smaller than that for the drive circuit. It is characterized by the fact that it was used.

By separating the ECD drive circuit, which consumes a large amount of power, and the control circuit, which consumes little power, it is possible to replace the power supply battery at the control circuit operation stop voltage. What was there was ECD
Until the drive circuit stops operating, the battery can be used at qJ function, and at this time, the drive circuit battery is only replaced, and the power to the control circuit is not cut off, so the information held by the control circuit is not lost. As a battery for the drive circuit, there is no problem even if you do not use a battery with a particularly good discharge voltage uniformity, so it is recommended to use a battery with a poor discharge voltage uniformity, such as a manganese dry battery or a mercury battery with a low discharge voltage. becomes possible.

DESCRIPTION OF EMBODIMENTS FIGS. 2 and 3 are schematic circuit diagrams of an ECD drive device according to the present invention, and it is also possible to use a single battery or a plurality of power batteries for the ECD drive circuit and control circuit, respectively. The middle one is the control circuit, and the second one is the drive circuit.

3 RODs, 4 is an oscillator (oscillation frequency 32,718H2
A crystal oscillator was used. ), 6 indicates a frequency divider, and 6 indicates a logic circuit.The ECU display was set to output a 1-second erase signal every 2 seconds, and to display a display during the following 1 second. As the ECD3, a tanksten oxide type 111D with a display area of 0.025 ca was used. .

Hereinafter, an embodiment of the ECDi operation using the circuit of the present invention will be described.

Example 1 The drive device shown in FIG.
As a result of completely erasing the EGD display using mAH),
The patient was able to move without any problems until about 320,000 cycles. The power supply voltage at that time was 1.47V between AB.

Between CDs 1. It was o2v. Further, the current flowing through the ammeter 8 was 0.1 μA.

On the other hand, for comparison, two batteries similar to those in Example 1 were used in parallel as the power source 7 of the conventional drive device (Fig. 1)] ~, E
As a result of erasing the OD display, the ECD operation stopped after about 220,000 cycles. The voltage between AB at this time was 1.36V.

Example 2 As a power source in Example 1F, instead of an alkaline manganese button battery, battery 7 and a silver oxide battery (SR60
As a result of using a mercury battery (MR-41, battery capacity 6 ohmAH) as the battery 9, the EOD display and erasure cycle is approximately 830,0
00 cycle 1, the control circuit voltage (voltage between AB) Jd'1. tf54V
, drive circuit voltage (between c and d)? 1E pressure) idO09v.

Example 3 The driver circuit shown in FIG. 3 was used to display and erase images on the F and CD panels. A silver oxide battery (5
Using two R60SW, battery capacity 1emAH) in series,
As battery 9, alkaline manganese button battery MR-41,
As a result of using two batteries (with a capacity of 60 mAH), it was possible to drive the ECD display and erase cycles up to approximately 1,600 α°C cycles without any trouble, and at that time, the power supply voltage of the control circuit was 3.07 V.

The current measured by current J18 is 0.22μA, and the voltage of the drive circuit power supply is 0.92゜- for CD and DE, respectively.
It was 0.90V.

Example 4 The drive circuit 2 shown in FIG. 3 was changed as shown by the 41st line 1. 11 in Fig. 4 is PNPI-Runsistor,
NPNI-Runcistor is a Q-driven drive circuit, with 13
d:... Nofa 1, 7 power supply for one circuit and (
% (B R1226 + 'ik battery capacity f1135 m A H) Interest rate ζ141 circuit is integrated and used as a power supply battery for the drive circuit. ! /1
2 h (NR44 battery capacity 260mAH) were used. E'CD3 differs from Examples 1 to 3 in that the display area (
An oxidation tank Stenbury ECD (2cn) was used. As a result, ECD display and erasure may be affected until approximately 700,000 cycles. The control circuit power supply voltage at that time was 2.65''/, and the drive circuit power supply voltage was approximately ±009V 7f-.

As described above, according to the present invention, the current flowing through one control circuit system is much smaller, and the power consumption is extremely low. (This eliminates the problem of long-term battery replacement only for the drive circuit system, and the loss of information held by the control circuit each time.Furthermore, in terms of battery discharge characteristics, batteries with poor voltage flatness can also be replaced. It can be used effectively.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of a conventional electrochromic display device driving device (FIG. 2 shows a circuit configuration of 14 components, FIG. 3 is a diagram showing a circuit arrangement of an electrochromic display device driving device of the present invention, and FIG. 4 is a diagram showing a circuit arrangement of a conventional electrochromic display device driving device). 3 is a diagram showing control circuits forming nine parts of the drive device shown in FIG. 3. 1... control circuit, 2... drive circuit, 3.
...ECD. 4... Oscillator, 5... Frequency divider, 6...
・Logic circuit. 7.9...Battery.

Claims (1)

[Scope of Claims] (1) It has a drive circuit that drives an electrochromic display element and a control circuit that controls the drive circuit, and each of the 1m drive path and the control circuit has a dedicated power source. An electrochromic display element driving device characterized by being equipped with a battery. (2) The electronic device according to claim 1, wherein a control circuit and a battery for the control circuit are connected within the device, and is provided with one or more sets of terminals for connecting the battery for the drive circuit. Chromic display element drive device. Place. (4) As batteries, lithium batteries, silver batteries, mercury batteries,
The electric hydrogen drive device according to claim 11, characterized in that at least one type selected from manganese batteries is used.