JPS6035778A - Magnetic 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 (1) Technical field of the invention The present invention relates to a single unit magnetic display device (hereinafter referred to as a display device) and a signal amplification circuit for driving the display device (hereinafter referred to as a buffer).
The present invention relates to an embodied magnetic display device.

(2) Prior Art and Problems Conventional displays are directly driven by external signals. When driving this display, normal L'EI)
Since input power iQ is required compared to driving a display, in a system where a display and an LED display are mixed, a small-capacity drive circuit is used to drive the LED display, and a large-capacity drive circuit is used to drive the display. There was the inconvenience of having to prepare a circuit for LJ.

Also, a small point: If you unify to a large-capacity type drive circuit, you will have to install a separate amplifier circuit for the display, resulting in a system configuration of 5"Il," and conversely, if you unify to a large-capacity type drive circuit, the system will increase in size. was there.

In addition, conventional displays require pulse drive when driving, and there is the inconvenience that a one-bit continuous signal must be used for the LED display, and a two-bit pulse signal for inversion and recovery for the display. Ta. In addition, while the display has the advantage of consuming zero power when displaying normal conditions, it consumes only a small amount of power when reversing and restoring the display when the status changes. There is a defect, 1j,l, which is very large.

In the case of 1 foot - 1 " (a case where many small devices are used for status display), assume that all small devices change their status at the same time even if the power consumption is zero in normal times. Then, there was a drawback that a large power supply device had to be prepared.

(3) Object of the Invention The object of the present invention is to solve the above-mentioned problems by including an amplification circuit and an AND circuit for a 1-bit status display continuous signal and a 1-bit driving timing pulse signal on the display side. Incorporate as one body.

This not only makes it possible to drive directly with a 1-bit continuous signal using a small-capacity drive circuit like an LED display, but also enables control of display timing so that multiple displays do not display status changes all at once. The purpose is to provide an indicator that shows the

(4) Key Points of the Invention The present invention integrates a buffer, which was conventionally provided in the middle when driving a display with a small-capacity drive circuit, with the display, and stores the state from the small-capacity drive circuit in the buffer. This magnetic display device is characterized in that, in addition to an amplification circuit for display signals, a reception amplification circuit for a drive timing signal and a circuit for creating an AND condition for both signals are provided.

(5) Embodiments of the Invention 1 The present invention will be explained based on the drawings. FIG. 1 is a circuit configuration diagram of an embodiment of the present invention I, in which 1 is a magnetic display device, 2 is a small capacity drive circuit, 3 is a display device, 4 is a buffer, and 15 is a display timing control circuit. When there is no human input signal from the constant display timing control circuit 15, the timing output amplifier L/Rannostar 9 is OFF and the signal power line 1 is turned off.
3 is O■, but the display timing control circuit 15
When a signal is input manually, the tamming signal amplification I-rannosk 9 is turned on and the signal power line 13 becomes 4.

Therefore, the buffer 4 detects the state of the small capacity drive circuit 2 only when there is an input signal from the display timing control circuit 15. When the small capacity drive circuit 2 is ON, a bit of current flows from the signal power line 13 to the small capacity drive circuit 2 through the sol-up resistor 10, and the input of the inverter amplifier 7 is
Therefore, the output of the inverter amplifier 7 becomes I-level, and the output of the inverter amplifier 3 becomes L level.

tjf=A current flows from the input 13 through the coil 5 to the output of the in-hark amplifier 8 (the set coil 5 operates and the display 3 is reversed. When the small capacity drive circuit 2 is OFF, there is no current flowing from the signal power supply line 13 to the input side, so the power of the inverter amplifier 7 is +l. Therefore, the output of the inverter amplifier 7 is at L level, and the output of the inverter amplifier 8 is at L level. The output becomes 1■ level, and a current flows from the signal power line 13 through the reset coil 6 to the output of the in-hark amplifier 7, the reset coil 6 operates, and the display changes to fjH[:].At this time, the display timing is controlled. The display 3 inverts the signal from the circuit 15.
Pulse driving becomes possible by setting the pulse width necessary for recovery.

In addition, each time the pull-up resistor 10 is set to a value suitable for the capacity of the small-capacity type drive circuit 2 and the pull-up resistor 11 is set to a value suitable for the capacity of the display timing control circuit 5, the small-capacity type drive circuit 2 and the display timing are set. The control circuit 16 can be of small capacity type. - The ratings of the inverter amplifier 7, inverter amplifier 8, and timing signal amplification transistor 9 are set to values necessary and sufficient to drive and invert the display 3.

The loop prevention diode 12 is effective in a system in which multiple inputs from the small capacity drive circuit 2 of the magnetic display device 1 are connected in parallel (in which signals from the display/timing control circuit 1G are input separately). 5. According to one embodiment of the present invention, the buffer is formed of a semiconductor circuit, so that the magnetic display device can be made small and lightweight, and it is also suitable for pulse drive because it can perform fast-acting and quick-returning operations. The current consumption during normal operation becomes zero, and the effect of using the display device can be reduced to 100% or 3°.

FIG. 2 shows another embodiment of the present invention, which differs from FIG. 1 in that the I11 and 1rA buffers from the small capacity drive circuit 2 are replaced by relays. t) The relay winding 14 is a DC resistor passed through the container of the small capacity drive circuit 2, and the relay winding 14 is rated at the I required to drive the set coil 5 and reset coil G. - minute value.The operation is Kokichi M type 4Bg circuit 2 or ON 11.1 relay S
When the current flows through the wire 14 and the relay contact IGIJ sets coil 5 side i:o F 16 is tilted toward the set coil 5 side or the reset coil 6 side depending on the state of the small capacity drive circuit 2, so that when there is a signal from the display timing control fa11 circuit 15, the signal is turned on depending on the state of the relay contact 16. Display 3
is reversed or restored. This embodiment has the effect that the number of parts is small and the circuit becomes a center line.

(7) Effects of the Invention According to the present invention, the state to be displayed is set once in the buffer built into the magnetic display device using a small-capacity drive circuit, and inversion and recovery are performed using a display timing system (311 circuit) provided separately.
For display device and 1. This has the effect of unifying and standardizing drive circuits for IED display devices without having to use separate drive circuits.

M) (There is no need to install a separate panosore between the small-capacity drive circuit and the display device, and the signal from the small-capacity drive circuit only needs to be one per display device.1) E I) Display device This has the effect of simplifying the connection in the same way as when driving. Since the rough display is performed by the display timing control circuit, even if the status of multiple displays changes at the same time, it is necessary to control the inversion of the display and (2) There is an advantage that there is no need to prepare one device.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of a first embodiment of the present invention, and FIG. 2 is a circuit diagram of another embodiment of the present invention. In the figure, ill is a magnetic display device, and 2 is a small capacity drive circuit. 3 is a display, 4 is a buffer, and 5 is a seventh I coil. No. 6 and 1 reno 1 to coil, 7 and 8 are inverter amplifiers. ! ] L:1 (mining signal amplification transistor, 10.
11 (I sol) 'tube resistor, 12 is the loop prevention diode -1, +3 is the signal power line, and J4 is the relay/8 wire. The J 5 II display timing control circuit is shown.

Claims (1)

[Claims] One end of the set coil and cent coil of the standalone magnetic display is connected to the display timing control circuit, and the other end is connected to the "C drive circuit" through the AND condition creation circuit, and the output pulse from the display timing control circuit and A magnetic display device that supplies current to the set coil when the logical product of output pulses from a drive circuit is obtained, and supplies current to the reset coil when the logical product cannot be obtained.