JPH10240182A - Rotary afterimage display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary afterimage display device capable of substantially expanding a visual recognition range recognizable from one direction. SOLUTION: In a display device main body 1 having light emitting columns 4a-4c aligning a plurality of light emitting diodes 5a-5c with the front arranged to emit, rotating the light emitting columns 4a-4c aligning a plurality of directional light emitting diodes 5a-5c, and displaying afterimages by blinking the above-mentioned light emitting diodes on a cylindrical locus of the rotation, a display quality is improved by arranging the light emitting elements of the light emitting columns positioned on the side of the rotational direction to form an emitting angle to the reverse side of the rotational direction, with respect to the above-mentioned light emitting column 4a facing the front, arranging the light emitting elements of the light emitting column positioned on the reverse side of the rotational direction to form an emitting angle reverse to the above one, making the directions of the LEDs to be plural to the normal direction of the outer periphery, and thus, substantially expanding a visual recognition range recognizable from one direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a rotary afterimage display device utilizing an afterimage phenomenon of a light emitting element.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open Nos. 57-185076, 2-213892 and 2-47519 disclose rotary display devices.
No. 47519 discloses that "a display means comprises a predetermined number of light-emitting portions arranged in a row from near one end of a long shape, and a moving means rotates the long shape portion by rotating the light-emitting portions. An aerial display device characterized by "rotating an installation position" is described. This type of display device is used in stores, stores, show windows, outdoor advertisements, stations, airports, and the like. In the above-mentioned rotary display device, an LED is often used as a light emitting element, and a plurality of LEDs are arranged in one row, and the LED row is rotated in a columnar shape to display a character, a pattern, and the like by light emission of the LED. It is. The control of the lighting of the light emitting element is provided, for example, by providing an optical sensor in the rotating part of the device and a light emitting element in the stationary part, and detecting the light emitted by the light emitting element with the optical sensor, thereby being output from the optical sensor. The signal is performed as a synchronization signal.

[0003] However, when the LEDs are arranged in a line, the directivity angle is narrow because the LEDs are high-luminance light-emitting elements. For example, as shown in FIG.
Is about 15 °. Accordingly, when the rotary display device 60 on which the LEDs 64 are arranged as shown in FIG.
There is a problem that the display made by the display device 4 is not clearly seen and the visible range of the display made by the display device 60 is narrow. In order to solve the above-described problem, for example, Japanese Patent Application Laid-Open No. 6-59634 discloses a light emitting element of a rotary display device and a lighting control method thereof. A light emitting element that emits light to the light emitting element 32 ”as shown in FIGS. 9A to 9C.
Display device 6 in which three light-emitting elements 39 are arranged so as to emit light in three directions without interfering with each other.
A light emitting element of 0 and a lighting control method thereof are described.

[0004]

However, as is apparent from FIG. 9, the above-mentioned Japanese Patent Application Laid-Open No. 6-59634 has a structure in which light emitting elements having different emission directions are collectively arranged at one place. Due to the above restrictions, the maximum is three, and there is a limit to the expansion of the viewing range.

SUMMARY OF THE INVENTION It is an object of the present invention to increase the visual recognition range of a rotary afterimage display device.

[0006]

According to a first aspect of the present invention, there is provided a rotary afterimage display apparatus having a plurality of light emitting arrays in which a plurality of light emitting elements are arranged. In a rotary afterimage display device that rotates a light emission array around a predetermined rotation center and performs afterimage display by controlling lighting of the light emitting element on a cylindrical rotation trajectory generated by the rotation, when viewed from a sufficiently distant point. The light-emitting elements are tilted differently in the rotation direction for each light-emitting row so that display areas of the visible light-emitting rows are different from each other (of course, adjacent display areas may overlap to some extent). They are arranged at an angle.

[0007] By setting the inclination angles of the light emitting elements to be different from each other in the rotation direction for each light emitting column in this manner, even when a light emitting element having a narrow directivity angle is used,
One wide display screen is formed by continuously displaying each visible display area (viewing range) formed for each light emitting column. Therefore, as compared with a conventional display device including only light emitting elements in the same direction, the visible range that can be visually recognized from one side can be greatly expanded.

Further, since it is not necessary to arrange a plurality of light emitting columns at one place, the problem of space in arranging each light emitting column is reduced, and the number of light emitting columns having different inclination angles can be set more. Therefore, the viewing range can be further expanded.

The inclination angle of the light-emitting element is defined in claims 2 to
Various embodiments are conceivable as described in No. 9, but are not limited thereto. In addition, a plurality of light emitting columns may be provided separately at different locations, or may be collectively arranged at one location as described in claim 10. In this case, the number of light emitting columns that can be arranged at one location is limited due to space restrictions, but power consumption can be reduced by driving each light emitting column independently.

Further, it is taken into consideration that the directional angle as a sensation of the light-emitting element changes depending on the surrounding brightness (for human eyes, the directional angle of the light-emitting element becomes wider as the surroundings become darker). As described in claim 14, an illuminance sensor for detecting ambient illuminance may be provided, and the number of light emitting arrays to be driven may be appropriately adjusted based on the detection result.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a rotary afterimage display device according to the present invention. Figure 1 shows three rows of LEDs
FIG. 3A is a top view of the main part of the display device viewed from a position where the display device is best shown, and FIG.
FIG. In the figure, 1 is a main body of a display device, 2 is a motor for rotating an LED, 3 is an outer peripheral portion, 4a,
Reference numerals 4b and 4c denote wiring boards for mounting the LEDs 5a, 5b and 5c, respectively, and reference numeral 6 denotes a printed circuit board on which a drive circuit for driving the LEDs is mounted.

When viewed from the LED rotating motor 2, the LED 5a has the same direction as the normal direction of the outer peripheral portion (front direction), the LED 5b also has a right direction with respect to the normal direction, and the LED 5c has a left direction with respect to the normal direction. Each of the wiring boards 4a,
4b and 4c are mounted in three rows so as to be aligned in the vertical direction.

In this embodiment, the wiring boards 4a, 4a
b and 4c are attached to the outer peripheral portion 3 in three rows at an angle of 120 ° to each other. This rotary image persistence display device includes a front-facing LED 5a, a right-facing LED 5b, and a left-facing L
The row of EDs 5c is rotated in the direction of the arrow in FIG. 4B, and the LEDs 5a, 5b, and 5c are driven at a predetermined timing. The lighting control of the LED 5a, the right LED 5b, and the left LED 5c determines the position of each light emitting column by detecting that a certain specific part of the rotating unit has reached a detection position appropriately provided on a non-illustrated stationary part. Done. In the case of this embodiment, when rotated in the direction of the arrow in FIG.
D5a, 5b, and 5c are driven in accordance with the display data, so that characters, patterns, and the like can be visually recognized as a series of screens, so that LED5c is driven, LED5a is driven, and then LED5b is driven. .

FIG. 2 is a block diagram showing an electric system in the above-mentioned rotary type afterimage display apparatus. This circuit is fixed 2
1 and a rotation side 22, and a control unit (C
PU) 23, memory 24, optical sensor 25, timing circuit 26, front-facing LED head 27, right-facing LED head 28, left-facing LED head 29, illuminance sensor 30, and the like. On the other hand, the fixed side 21 has an LED
31 are provided.

The illuminance sensor 30 detects the illuminance around the display device. For example, even when the display device is placed outdoors, the brightness of the surroundings depends on the weather and time (daytime or night). It changes, and as the surroundings become darker, the directional angle of the LEDs becomes widely perceived by human vision, so the LEDs to be driven according to the surrounding brightness are determined,
It is provided to suppress power consumption while securing a sufficient viewing range.

Light from the LED 31 on the fixed side 21 is converted into an electric signal by the sensor 25 on the rotating side, and the signal is input to the control unit (CPU) 23 via the timing circuit 26. The control unit 23 uses the signal as a synchronization signal,
The position of each of the LED heads 27 to 29 is detected based on the signal, and the light emission of the LED heads 27 to 29 is controlled according to the display data stored in the memory 24. When the illuminance sensor 30 detects that the surroundings have been darkened to a certain extent, an LED head that emits light is selected so that, for example, only the LED head 27 emits light. Thereby, power consumption can be suppressed while securing a sufficient visual recognition range.

FIG. 3 to FIG. 6 schematically illustrate an embodiment of the display device according to the present invention. However, it is assumed that the position of the eyes looking at the display in each figure is sufficiently far away, and that the light rays from the LEDs to the eyes are parallel light rays. The eyes are located in the direction indicated by the arrow V in each figure. The lighting of each LED
This is performed based on the position on the outer peripheral portion 3 and the display data. Here, in order to facilitate understanding of the present invention, each LE
It is assumed that D is always lit.

In the first embodiment shown in FIG. 3, the main body 1 has (A) a front-facing LED 5a, (B) a right-facing LED 5b,
(C) The left-facing LED 5c is mounted. First, in FIG. 3C, the LED 5c is mounted in a direction inclined leftward (+ 2θ) with respect to the normal direction of the outer peripheral portion 3 of the main body 1. For this reason, the central portion of the light from the LED 5c is emitted at an angle (−2θ) to the left with respect to the normal direction of the outer peripheral portion 3. Here, the directional angle of the light emitted from the LED is set to 2θ (each left and right θ).
On the other hand, in FIG.
Is installed in the same direction as the normal direction of LE.
The light of D5a is emitted in the same direction as the normal direction of the outer peripheral portion 3. Accordingly, as can be seen from the figure, of the light emitted from the LED 5a at the directional angle 2θ, only the component that travels in parallel to the straight line connecting the eye and the rotation axis 2 reaches the eye that is sufficiently far away, so that the LED 5a Is a range (2θ) indicated by oblique lines. As shown in FIG.
D5b is attached in a direction inclined (−2θ) to the right with respect to the normal direction of the outer peripheral portion 3 of the main body 1. For this reason,
The central part of the light from the LED 5b is emitted at an angle (+ 2θ) to the right with respect to the normal direction of the outer peripheral part 3. As described above, since the LED 5b and the LED 5c are mounted to be inclined with respect to the normal direction of the outer peripheral portion 3, for example, L
When the ED 5c rotates to the position of (+ 3θ) in FIG. 9C, the left end of the light emitted from that position is visually recognized, and L
Even if the ED 5b rotates to the position (-3θ) in FIG. 7B, the right end of the light from the LED 5b can be visually recognized.

In this manner, the visible range of this embodiment is the visible range of the front-facing LED 5a (-θ to +
θ), the visible range of the rightward-facing LED 5b (−3θ to −θ),
And the visible range (+ θ to + 3θ) of the left-facing LED 5c is obtained.
θ to + 3θ) is formed on the outer peripheral portion 3. Therefore, as compared with the visible range (-θ to + θ) of only the front-facing LED 5a, the visible range is tripled as shown in FIG.

FIG. 4 illustrates a second embodiment of the rotary afterimage display apparatus according to the present invention. The principle of this embodiment is almost the same as that of the above-described first embodiment, except that two LEDs are attached to the main body 1.
Is different from the embodiment. That is, the rotary type afterimage display device includes a left-facing LED 5e shown in FIG.
A rightward LED 5d shown in FIG. 3A is attached, and these two kinds of LEDs are arranged at different positions shifted from each other by a predetermined angle (for example, 180 °) about the rotation axis 2. In FIG. 2B, the LED 5e is mounted in a direction inclined leftward (−θ) with respect to the normal direction of the outer peripheral portion 3 of the main body 1. Also, in FIG.
5d is attached in a direction inclined (+ θ) to the right with respect to the normal direction of the outer peripheral portion 3 of the main body 1. Each L
Since the EDs 5d and 5e are attached to the outer peripheral portion 3 at an angle as described above, for example, the LED 5e is (+2) in FIG.
When rotated to the position of θ), the left end of the light emitted from that position is visible to the eyes. Also, for example, LED5
Even when d rotates to the position (-2θ) in FIG. 9A, the right end of the light emitted from the LED 5d is still visible to the eye.

As described above, the visible range in this embodiment is the visible range of the rightward-facing LED 5d (−2θ to
0) and the visible range of the left-facing LED 5e (0 + 2θ)
Are obtained, and these are continuously viewed in a total visual range of 4θ (−
2θ to + 2θ), this is LE
As compared with the visual recognition range of only D5a (−θ to + θ), it is doubled as shown in FIG.

FIG. 5 illustrates a third embodiment of the rotary afterimage display apparatus according to the present invention. In this embodiment, as shown in the figure, two LEDs 5f and 5g are additionally mounted on the configuration of the above-described second embodiment, and these four types of LEDs are mutually fixed around the rotation shaft 2. They are arranged at different positions sequentially shifted by an angle (for example, 90 °). The inclination angles of the outer peripheral portions of the respective LEDs 5f and 5g with respect to the normal direction are (−3θ) and (+ 3θ). For this reason, the visible range of each LED is as follows.
Is -2θ to 0, LED5e is 0 to + 2θ, LED5g is + 2θ to + 4θ, and the whole is -4θ to + 4θ.
One continuous wide viewing range of θ is obtained.

For this reason, this visible range is 4 compared to the visible range -θ to + θ of only the front-facing LED 5a.
It is enlarged twice. FIG. 5 schematically shows a viewing range 51 that can be viewed from one direction. That is,
If you are far enough, the light from LED5f (LED5f
(A display image formed by this) can be visually recognized within the visible range 51a. Further, light from the LED 5e (display image formed by the LED 5e) can be visually recognized within the visible range 51d. Further, light from the LED 5d (a display image formed by the LED 5d) can be visually recognized within the visible range 51c. Furthermore, light (display image formed by the LED 5g) from the LED 5g can be visually recognized in the visible range 51b.

The display may be located, for example, near a wall. In that case, one side portion of the outer peripheral portion 3 is hardly seen by a person. In such an installation state, only the LED 5d to LED 5d
5 g may be turned on. Thereby, power consumption can be suppressed. In that case, each L
Focusing on the angles of ED5d to 5g, specifically, LED
Since the light emitted from the LED 5f cannot be seen from the direction of the arrow V at the position of the LED 5f, the position of the LED 5f (viewing range 5
In 1a), the lighting of each of the LEDs 5d to 5f may be controlled so as not to be turned on. The control unit 23 determines the lighting range by the light of the LED 31 in FIG.
Timing detected by each LED and each of the LEDs 5d to 5d
It can be recognized based on the angle of f.

FIG. 6 illustrates a fourth embodiment of the rotary afterimage display apparatus according to the present invention. This embodiment is different from the first embodiment in that two LEDs 5 are used.
h, 5i are additionally attached, and these five types of L
The EDs are at a predetermined angle (for example, 7
2 °).
That is, first, the LE in the same direction as the normal direction of the outer peripheral portion 3 is set.
D5a, an LED 5c inclined leftward by 2θ with respect to the normal direction of the outer peripheral portion 3, and an LED 5h inclined leftward by 4θ with respect to the normal direction of the outer peripheral portion 3 are provided.

An LED 5b inclined rightward with respect to the normal direction of the outer peripheral portion 3 and an LED 5i inclined rightward 4θ with respect to the normal direction of the outer peripheral portion 3 are provided. The visible range of each LED is from -5θ to-
3θ, LED5b is -3θ ~ -θ, LED5a is -θ ~
+ Θ, LED5c is + θ to + 3θ, LED5h is + 3θ
To + 5θ, so that one continuous wide viewing range from −5θ to + 5θ is obtained. Therefore, this visible range is expanded five times compared to the visible range (−θ to + θ) of only the front-facing LED 5a. The other points are almost the same as those in the first embodiment, and the description thereof is omitted.

FIG. 7 illustrates a fifth embodiment according to the present invention. As shown in the figure, the main body 1 is provided with a row of front-facing LEDs 5a, right-facing LEDs 5b, and left-facing LEDs 5c as in the first embodiment, but the wiring boards 4b and 4c Are attached to the same location by a fixture 4d. Each LED 5a
5c are mounted so as to be slightly different in the vertical direction. The other points are the same as in the first embodiment described above, and the description thereof is omitted. Further, the position at which the attachment 4d is attached to the outer peripheral portion 3 may be any position. In this example, the wiring boards 4a, 4b, 4
The three LEDs above c are shown, and the others are omitted.

In the fifth embodiment, for example, three components shown in FIG.
Place on top. The vertical relationship of the LEDs 5a to 5c in each head is, for example, different for each head. Thereby, the display can be fleshed out and a clear display can be performed.

In the above-described embodiment, the LED is used as the display element.
In addition, any display element small enough to constitute a screen may be used, and for example, a lamp or the like may be used.

Further, each LED need not be disposed on the surface of the cylindrical object (outer peripheral portion 3) at all, and any LED can be rotated substantially along one circumference. It may be something.

The number of LED rows is not limited to that described in each of the above embodiments.
The required number of arrangements can be made as appropriate in accordance with the directivity angle, the size of the required viewing range, and the like. For example, if the configuration shown in FIG. 7 is a single head, the mounting angle of the LED may be different for each head.

Further, a front-facing LED array and a right-facing LED
Only, and the front facing LE
A combination of only the D row and the left-facing LED row may be used.

[0033]

As described above, according to the rotary image persistence display device of the present invention, since the direction of the light emitting element is made plural with respect to the normal direction of the outer peripheral portion, the visible range which can be visually recognized from one direction is increased. It can be greatly expanded, and the display quality can be significantly improved. This makes it easier to grasp the information displayed on the display device.

Further, since a plurality of light emitting arrays having different inclination angles are driven independently of each other, power consumption can be minimized while securing a wide viewing range.

[Brief description of the drawings]

FIG. 1A is a top view and FIG. 1B is a perspective view of a rotary image persistence display apparatus according to a first embodiment of the present invention.

FIG. 2 is a block diagram of a control circuit according to the first embodiment of the present invention.

FIGS. 3A and 3B illustrate an operation of the display device according to the first embodiment of the present invention, in which FIG.
(B) is a right-facing LED, (C) is a left-facing LED,
(D) is a diagram showing a visible range.

FIGS. 4A and 4B show a display device according to a second embodiment of the present invention, in which (A) is a right-facing LED, and (B) is a left-facing LE.
D and (C) are viewing ranges.

FIG. 5 is a view showing a visual recognition range of a display device according to a third embodiment of the present invention.

FIG. 6 is a diagram illustrating a visible range of a display device according to a fourth embodiment of the present invention.

FIG. 7 is a diagram showing a fifth embodiment according to the present invention.

FIG. 8 is a diagram showing an example of a conventional rotary display device.

FIG. 9 is a diagram showing another example of a conventional rotary display device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Main body 2 LED rotation motor 3 Outer peripheral part 4a, 4b, 4c Wiring board 5a, 5b, 5c, 5d, 5e, 5f, 5g, 5h, 5
i LED 6 printed circuit board 23 control unit 24 memory 25 optical sensor 26 timing circuit 27, 28, 29 LED head 30 illuminance sensor 31 LED

Claims (14)

[Claims] 1. A light-emitting device comprising: a plurality of light-emitting arrays in each of which a plurality of light-emitting elements are arranged; rotating the plurality of light-emitting arrays around a predetermined center of rotation; In a rotary afterimage display device that performs afterimage display by lighting control, the light-emitting elements are mutually moved in the rotation direction for each light-emitting column so that display regions of the light-emitting columns that can be viewed from a sufficiently distant point are different from each other. A rotary afterimage display device, wherein the display devices are arranged at different inclination angles. 2. The plurality of light-emitting columns are composed of a first light-emitting column composed of a plurality of light-emitting elements inclined at a predetermined angle in the positive direction of the rotation direction, and are the same as the predetermined angle in a direction opposite to the rotation direction. The rotary afterimage display device according to claim 1, further comprising a second light emitting column including a plurality of light emitting elements inclined at an angle. 3. The plurality of light-emitting columns include a first light-emitting column composed of a plurality of light-emitting elements inclined at a first angle in a positive direction of the rotation direction, and a first light-emitting column in a direction opposite to the rotation direction. Of a plurality of light emitting elements tilted at the same angle as
A third light-emitting column composed of a plurality of light-emitting elements tilted at a second angle larger than the first angle in the positive direction of the rotation direction, and the third light-emitting line in a direction opposite to the rotation direction. 2
2. The rotary afterimage display device according to claim 1, further comprising: a fourth light emitting column including a plurality of light emitting elements inclined at the same angle as the angle of the light emitting element. 4. The rotary afterimage display device according to claim 2, wherein the predetermined angle is a half of a directivity angle of the light emitting element. 5. The light emitting device according to claim 3, wherein the first angle is 1/2 of the directivity angle of the light emitting device, and the second angle is 3/2 of the directivity angle of the light emitting device. The rotary image persistence display device according to claim 1. 6. The plurality of light emitting columns are inclined at a predetermined angle in a positive direction of the rotation direction with a first light emitting column composed of a plurality of light emitting elements arranged in a radial direction from the rotation center. And a third light emitting line composed of a plurality of light emitting elements inclined at the same angle as the predetermined angle in a direction opposite to the rotation direction. The rotary afterimage display device according to claim 1. 7. The plurality of light emitting rows are arranged at a first angle in a positive direction of the rotation direction with a first light emitting row composed of a plurality of light emitting elements arranged in a radial direction from the rotation center. A second light-emitting row composed of a plurality of light-emitting elements tilted, a third light-emitting row composed of a plurality of light-emitting elements tilted at the same angle as the first angle in a direction opposite to the rotation direction, and A fourth light-emitting array composed of a plurality of light-emitting elements tilted at a second angle greater than the first angle in the forward direction, and at the same angle as the second angle in a direction opposite to the rotational direction. The rotary afterimage display device according to claim 1, further comprising a fifth light emitting column including a plurality of inclined light emitting elements. 8. The rotary afterimage display device according to claim 6, wherein the predetermined angle is the same angle as the directional angle of the light emitting element. 9. The light emitting device according to claim 7, wherein the first angle is the same as the directional angle of the light emitting element, and the second angle is twice the directional angle of the light emitting element. The rotary image persistence display device according to claim 1. 10. The rotary image persistence display device according to claim 1, wherein said plurality of light emission columns are arranged at one place. 11. The rotating afterimage display device according to claim 1, wherein the lighting control of the light emitting elements is performed independently for each light emitting column. 12. A plurality of heads each having at least one light-emitting array in which a plurality of light-emitting elements are arranged, rotating the plurality of heads around a predetermined center of rotation, and forming a cylindrical rotation caused by the rotation. In a rotary afterimage display apparatus that performs afterimage display by lighting control of the light emitting elements on a trajectory, wherein the light emitting columns are arranged at different inclination angles in the rotation direction in the head unit or the light emitting column units. Rotating afterimage display device. 13. The rotary afterimage display device according to claim 12, wherein the lighting control of the light emitting elements is performed independently for each of the heads or for each of the light emitting columns. 14. A control unit for controlling lighting of the light emitting element is provided with an illuminance sensor for detecting an illuminance around the rotary image persistence display device, and the control unit should be driven based on a detection result of the illuminance sensor. 13. The rotary afterimage display device according to claim 1, wherein the number of light emission columns is adjusted.