JPH0564887U - Display device - Google Patents

Abstract

(57) [Abstract] [Purpose] A low-cost, small-sized display device that can easily change the display data and uses the afterimage effect. A display means in which a predetermined number of light emitting portions are arranged side by side in a row, display data storage means capable of serial output, and control signal generating means for causing the light emitting portions of the display means to emit light in time series are provided. The control signal generation means is a programmable logic device, and display data is serially sent from the display data storage means to the display means in response to the control signal, and a light emitting unit is caused to emit light for each column to display by an afterimage effect. Is characterized by.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device, and more particularly to a display device that utilizes an afterimage effect by causing light emitting portions arranged in rows to emit light.

[0002]

[Prior Art]

 Conventionally, in a display device utilizing the afterimage effect, for example, in the display device disclosed in Japanese Unexamined Patent Publication No. 2-213892, a control signal generating means and a memory for storing image data are connected in parallel. In addition, it is necessary to connect about 3 bits of control lines, and the large area of the printed circuit board makes it difficult to reduce the size and cost. On the other hand, if the display data is written in the mask ROM section of the mask ROM type 1-chip microcomputer, the size and cost can be reduced, but the display data cannot be easily changed.

[0003]

[Problems to be solved by the device]

 SUMMARY OF THE INVENTION The present invention solves such a conventional problem and provides a low-cost and small-sized display device in which display data can be easily changed.

[0004]

[Means for Solving the Problems]

 According to the present invention, a display means in which a predetermined number of light emitting portions are arranged side by side in a row, a display data storage means capable of serial output, and a control signal generation for causing the light emitting portions of the display means to emit light in time series The control signal generating means is a programmable logic device, and display data is serially sent from the display data storing means to the display means by the control signal to cause the light emitting section to emit light for each column. The feature is that it is displayed by the afterimage effect.

[0005]

[Action]

 According to the present invention, by connecting a few control signals from the control signal generating means to the display data storing means capable of serial output, the light emitting portion of the display means can be operated with the minimum number of parts and wiring. (EN) Provided is a display device which emits light for each column in a series to obtain a predetermined display by an afterimage effect.

[0006]

【Example】

 Next, the present invention will be described with reference to the drawings. 1 is a configuration block diagram of a first embodiment of the present invention, and FIG. 2 is a timing chart of FIG. In the figure, 1 is a control signal generation unit, 2 is a memory capable of serial output (hereinafter, serial memory), 3 is a display unit, 4 is a transmitter, and 5 is a trigger signal generation unit. Further, 1a is a counter, 1b is a programmable logic device, 3a is an LED driver, and 3b is an LED unit (light emitting unit). A programmable logic device (PLD) that is electrically erasable and writable has been widely used in recent years. However, since one flip-flop is built in multiple stages as standard, one PLD can provide one control signal generator. Although it can be configured, it is described separately here to clarify the control signal.

The trigger signal TRIG output from the trigger signal generator 5 resets the counter 1a to leave the serial memory 2 in a non-selected state. When this is released, the control signal generator 1 causes the serial memory 2 On the other hand, when the read command and the memory start address are transferred through DI, the predetermined display data is read from the serial memory 2 and sent to the LED driver 3a only by applying the clock SCK, and then in a row by the control signal RCK. The arranged LED units 3b are turned on for each column according to the display data, and a predetermined display is obtained by the afterimage effect of the eyes.

This operation will be described in detail with reference to the timing chart of FIG. The inverted signal CS of the trigger signal TRIG rises in response to the fall of the trigger signal, and brings the serial memory 2 into the selected state. At this time, since the counter 1a is reset by the RST having the same phase as TRIG, the counter output (ADR) AD1. ． ． AD1 1 becomes 0. Here, it is assumed that AD0 is a clock obtained by dividing the oscillator 4 by 2, AD1 is a clock obtained by dividing by 4, and ADi is a clock obtained by dividing 2 by the power of i + 1. At this time, when DI is sent to serial memory 2 in the order of 1, 1, 0, memory start address at the falling edge of SCK, it becomes the read mode, and the display data is serially output from the upper bit to DO at the falling edge of SCK. Will be done. This serial data is read into the serial read LED driver 3a at the rising edge of DSCK, and parallel latched by RCK to light the LED section 3b according to the data.

Since this timing chart describes the case where there are 32 LEDs, RCK is raised and latched to the LED driver 3a every time 32 bit data is transmitted. While displaying this column data, 32 more clocks are sent to prepare the next column data in the serial register section of the LED driver 3a, and the next column data is displayed by raising RCK. It By repeating this, the display of 32 × 63 dots is displayed by utilizing the afterimage effect of the eye.

Although the 8-bit LED driver μPD6345 with a built-in serial input shift register has been described here as the LED driver 3a, if the 16-bit constant current driver with a built-in shift register is used, each LED in the display unit 3 will be described. The number of parts can be significantly reduced because only one resistor is required for each LED driver. Furthermore, even if the voltage drops when the battery is driven, the brightness of the LED can be kept constant if the logic voltage of the constant current driver is kept constant by the booster circuit. As the booster circuit, for example, a step-up circuit may be formed by a DC / DC converter ICIR3MO3A. For example, the above-mentioned display device is operated by a 3 V battery, and a booster circuit supplies a 5 V logic voltage, and the LED drive is operated in a 3 V system.

When a 4-kbit serial memory 2 is used as the serial memory 2, two 32 × 64-bit displays can be displayed. However, depending on the value of the switch 6, the control signal generator 1 starts the serial memory 2 with a start address. A7. ． It is possible to switch and output two screens by switching A0 to 00H or 80H and sending it to DI.

In the method of using the PLD for the control signal generation unit 1, since the function can be easily written in the design side and the final assembly process, it is possible to develop a product with a short lead time. It is necessary to use a one-chip microcomputer for the control signal generation unit at the stage of making the system more compact. Even in this case, if only the control software is stored in the mask ROM section and the display data is stored in the serial memory as in the above-mentioned configuration, what is the characteristic of this display device is that the data can be easily changed at a low cost. It does not spoil the small size.

A method of using a sensor signal as shown in FIG. 3 as a trigger signal generating means is also conceivable. FIG. 3 shows an example of application to a hand waving signal lamp 11 using a rubber joint 10, in which a sensor unit is composed of a magnet 9 and a Hall IC 8 to generate a trigger signal.

As shown in FIG. 4, when the display device, for example, the entire signal lamp 11a is formed of one rigid body, the vibration sensor having the structure shown in FIGS. 5A, 5B, and 5C is provided inside. Need to be incorporated. The vibration sensor shown in FIG. 5 is similar to a simple acceleration sensor. For example, as a detection unit, a micro switch 13 (FIG. 5a), a reflection type photo interrupter 15 (FIG. 5b), a Hall IC 8 and a magnet 9 (FIG. 5c) or the like is used. In FIG. 5, 12 is a weight and 14 is a leaf spring.

In the case of a hand waving signal lamp, the usage modes are (a) right swing, (b) up swing, and (c) left swing, as shown in FIG. It is possible to switch the display. That is, the hall element 16 is used for the vibration sensor built in the signal lamp 11a, and the amplified output voltage is input to the A / D conversion input port of the one-chip microcomputer which is the control signal generation unit 1 to detect the average detection input. By controlling the voltage and the maximum and minimum voltage, it is possible to distinguish how to swing and perform control to generate a trigger signal (FIG. 7). In FIG. 7, (a) shows the right swing, (b) shows the upper swing, and (c) shows the left input, the input voltage, the moving average voltage, and the trigger signal. It is needless to say that even if the 1-chip microcomputer does not have an A / D converter built-in, the above system can be realized by using a resistor ladder as a sequential A / D as long as there is a comparator input port.

FIG. 8 shows another example of the vibration sensor for automatically discriminating the above-described swinging method. The guide 20 is arranged in the grip portion of the signal lamp 11a so as to be inclined in one direction, and the mover 21 slides on the guide. The Hall element 16 is provided below the one end of the guide 20 while being freely attached. Also in this case, how to swing the signal lamp 11a is determined in the same manner as in the case of FIG.

As a mode of the display switching by the automatic discrimination of the above-mentioned swinging method, in FIG. 6, (a) the display of “recommended” is displayed when the player swings to the right, and (b) the display of “to rare” is displayed when the player swings upward. (C) It is illustrated that "Mate" is displayed when turning to the left.

Next, another control operation of the control signal generator 1 will be described.

When the display device is the hand-shake signal lamp, the hand-moving speed may be different depending on the person who handles it, and correspondingly, the output timing of the display data from the serial memory 2 or the LED may be changed according to the hand-moving speed. The drive timing of the driver 3a is changed. The waving speed of the signal lamp 11a is input by detecting the ON-OFF timing of the vibration sensor described above, so that the output timing corresponding to the input value can be obtained, for example, the output of the standard waving speed. The timing is set in advance, and the control signal generator 1 controls the output timing to be delayed in proportion to the slowness of the hand shaking speed. As a result, the afterimage effect that makes it easy to read the display is always obtained.

The control signal generator 1 is operated by the switch 6 or the separately connected switch 22 (see FIG. 1) to switch the lighting mode of the display unit 3. That is, in the above description, the predetermined LED section 3b of the display section 3 is turned on based on the display data from the serial memory 2, but when the switch 6 or 22 is turned on, all the LED sections 3b blink. Control to be in blinking mode. In addition, this switching of the blinking mode uses the vibration sensor regardless of the switch operation, and detects that the sensor does not swing for a certain period of time, that is, automatically when the hand gesture of the signal light is not detected for a certain period of time. The flashing mode may be switched to.

FIG. 9 shows a second embodiment of the present invention. This is because not only can the display data be easily written at the time of shipment, but it is also possible for the user to change the display data at the store after being sold and to have their favorite character change it. belongs to.

The serial memory 2 may be an SRAM type, but it is basically assumed to be an EEPROM. This is because when the data writer is inserted into the connector at the time of writing, the logic voltage system becomes the writer side, the power supply of the display device is forgotten, and the logic power supply voltage is 0.3% from the writer side voltage due to battery consumption. Even if the voltage drops below V, the logic voltage is taken over by the voltage on the writer side so as not to damage the input port of the serial memory. Also, when the writer is inserted into the connector, the output enable terminal of the PLD is pulled up and the output goes into a high impedance state so that the output is not shorted by the input signal DI of the serial memory.

FIG. 10 is a timing chart of the write timing of the second embodiment, taking S2933 CR of the serial EEPROM as an example. In this serial EEPROM, at the time of data writing, first, (1) write enable mode is set, then (2) the address and data are written for each 16-bit word at the write timing, and finally (3) write It ends in the enabled state. In addition to the above, the serial EEPROM also has a μPD6245 in which DI and DO are combined into one input / output pin, but it can be used in almost the same manner by using an external transistor or the like.

Needless to say, the device of the display unit is not limited to the LED, and a combination of a liquid crystal shutter array and a backlight, a combination of a PLZT shutter array and a backlight, a fluorescent display tube, and the like can be used.

[0025]

[Effect of the device]

 According to the present invention, it is possible to configure a display device that utilizes the afterimage effect of the eye, which is small in size, low in cost, and easy to change display data. Therefore, it is possible to create a simple display device for not only a signal light, a toy, and a support flag but also a rotating or vibrating object.

[Brief description of drawings]

FIG. 1 is a block diagram of a display device according to the present invention.

[Fig. 2] Timing chart

FIG. 3 is a perspective view illustrating a signal lamp.

FIG. 4 is a perspective view illustrating another signal lamp.

FIG. 5 is a side view illustrating a vibration sensor.

FIG. 6 is an explanatory diagram showing a manner of swinging a signal light.

FIG. 7 is an example of a sensor signal according to the manner of swinging.

FIG. 8 is a partial side view showing another vibration sensor.

FIG. 9 is a block diagram of a second embodiment of the present invention.

FIG. 10 is a write timing chart of the second embodiment.

[Explanation of symbols]

 1 Control Signal Generation Section 1a Counter 1b PLD 2 Serial Memory 3 Display Section 3a LED Driver 3b LED 4 Oscillator 5 Trigger Signal Generation Section 6 Switch 7 Booster Circuit 7a DC / DC Converter IC 8 Hall IC 9 Magnet 10 Rubber Joint 11 Rigid body integrated display device 12 Weight 13 Micro switch 14 Leaf spring 15 Reflective photo interrupter 16 Hall element

Claims (10)

[Scope of utility model registration request] 1. Display means in which a predetermined number of light-emitting portions are arranged side by side in a row, and display data storage means capable of serial output,
A control signal generating means for causing the light emitting portion of the display means to emit light in time series, and the control signal generating means is a programmable logic device, and display data is serially output from the display data storage means by the control signal. A display device characterized in that it is sent to a display means and a light emitting section is caused to emit light for each column to display by an afterimage effect. 2. The display device according to claim 1, wherein the control signal generating means is a one-chip microcomputer. 3. The display device according to claim 1, wherein the light emitting portion of the display means is an LED. 4. The display device according to claim 1, wherein the light emitting portion of the display means comprises a transmitted light switching element and a backlight. 5. The display device according to claim 1, wherein the display data storage means comprises a display data storage section capable of serial output and a display data rewriting section. 6. The display device according to claim 1, wherein the device is a hand signal light. 7. The display device according to claim 6, wherein a trigger signal is generated by using a vibration caused by hand shaking as a sensor signal. 8. The display device according to claim 6, wherein the vibration of a hand shake is used as a sensor signal to automatically determine how to shake, and the display of the display means is switched. 9. The display device according to claim 6, wherein the control signal generation means performs a control operation of changing the data output timing of the display means according to the hand shaking speed. 10. The display device according to claim 6, wherein the control signal generation means includes a blinking mode switching means for blinking all the light emitting portions of the display means.