JP6400353B2 - Signal display device - Google Patents

Description

  The present invention relates to a display device used as a traffic signal lamp or the like incorporated in a traffic signal device.

  As a vehicular signal lamp, for example, in a blue lamp, a blue light emitting diode and a green light emitting diode are alternately and evenly arranged, or only a blue light emitting diode is arranged in the central area of the lamp, and the outer area around it. A blue light emitting diode and a green light emitting diode are alternately and equally arranged (see Patent Document 1).

  However, an example in which blue light emitting diodes and green light emitting diodes are alternately and evenly arranged in a blue lamp does not display a pattern having a specific meaning, and also balances the density of two color diodes. Therefore, it is easy to limit the pair of colors to be combined. Further, in the example in which the color pattern of the diode is changed in the central region and the outer region in a blue lamp, the pattern recognized by a general color blind person (that is, a normal color blind person) and a color blind person (that is, a color weak person) are greatly different. In some cases, it may be undesirable.

JP-A-9-271298

  The present invention has been made in view of the above points, and can display a pattern having a specific meaning while increasing the degree of freedom related to color selection. An object of the present invention is to provide a display device for signals that can recognize the same pattern.

A signal display device for achieving the above object includes a display area for displaying a predetermined pattern, and a basic light emission for emitting light of a basic color for a general color sense person to a main area excluding the outline of the predetermined pattern The device is arranged, and an additional light emitting device that emits light of an additional color that can be recognized by a color vision specific person is arranged in a contour area of a predetermined pattern.

  According to the display device, since the additional light emitting device that can be recognized by the color vision peculiar person is arranged in the contour area of the predetermined pattern, the general color vision person signals the predetermined pattern including the contour displayed in the display area. Can be recognized as. Further, the general color sense person can recognize the contour region of the predetermined pattern as a signal equivalent to or substantially the same as the predetermined pattern.

  In a specific aspect of the present invention, the outline region is a substantially unbroken band-shaped region, and the width of the band-shaped region is narrower than the portion where the main region is the thinnest. In this case, it is possible to perform pattern recognition with less discomfort for the general color vision person.

  In another aspect of the present invention, the basic color and the additional color are similar colors. Here, the similar color means a case where the hue difference is 90 ° or less in an HSV (Hue, Saturation Chroma, Value Lightness Brightness) color space, for example. By making the basic color and the additional color similar, it becomes easy for general color-senses to recognize the predetermined pattern displayed in the display area as a signal of the original color, and signal misidentification is reliably avoided. can do.

  In still another aspect of the present invention, the basic light emitting device and the additional light emitting device are solid-state light emitting elements, and at least the basic light emitting devices are arranged two-dimensionally. Solid-state light emitting devices generally tend to have a narrow half-value width of the light emission peak, but by using the basic color and the additional color in combination as described above, there is no sense of incongruity for general color perception and easy recognition for color perception specifics. A display device for signals can be provided.

  In still another aspect of the present invention, the display area is formed in a local area within the display frame. Here, in the non-display area excluding the display area in the display frame, a predetermined pattern can be made conspicuous by making it blackish with little emission light.

  In yet another aspect of the present invention, the display area is provided in a pedestrian traffic light. In this case, it is possible to ensure the safety of not only general color vision persons but also color vision specific persons.

  In still another aspect of the present invention, the display area is provided in an information display device associated with a traffic signal. In this case, traffic information and other various information can be provided to general color blind persons and color vision specific persons.

It is a figure explaining the display apparatus for signals. It is a figure explaining the signal control system incorporating the display apparatus of FIG. (A) is a figure explaining the example of 1 arrangement of the light emitting device in the display area of a display device, and (B) is a figure explaining another example of arrangement of a light emitting device. It is a figure explaining the light emission characteristic etc. of a light emitting device. It is a conceptual diagram explaining the cross-sectional structure of a light-emitting device. It is a figure explaining the signal control system of a modification.

  Hereinafter, a signal display device according to an embodiment of the present invention will be described in detail with reference to the drawings.

  The signal display device 10 illustrated in FIG. 1 includes a red first lamp 11, a blue second lamp 12, a cover 14, and a hood 19 in appearance.

  The first lamp 11 is a travel impossible signal, and lights up mainly in red. The 1st lamp | ramp 11 has the display area 11a of the pattern shape corresponding to the silhouette of the person who stopped (stopper) in the rectangular display frame 15, and the non-display area 11b of the dark background surrounding the display area 11a. . It can be said that the display area 11 a is formed in a central local area in the display frame 15. The display area 11a is divided into a main area 11p and a contour area 11q, which are slightly different in display color, and each area 11p, 11q will be described in detail later. It is formed by arranging in two dimensions. The display area 11a can be switched between a lit state in which light is emitted in red and its similar colors and a dark unlit state close to black. In the non-display area 11b, a light absorber is disposed instead of a solid light emitting element, and the light is always dark. For this reason, when the display area 11a is in a lighting state, the non-display area 11b is a dark background area surrounding the display area 11a composed of red and its similar colors. On the other hand, when the display area 11a is turned off, the display area 11a and the non-display area 11b, that is, the inside of the rectangular display frame 15 are dark areas as a whole.

  The second lamp 12 is a progress permission signal and lights up mainly in blue. The second lamp 12 has, in a rectangular display frame 16, a pattern-like display area 12a corresponding to the silhouette of a walking person (crossing person) and a dark background-like non-display area 12b surrounding the display area 12a. . It can be said that the display area 12 a is formed in a central local area in the display frame 16. The display region 12a is divided into a main region 12p and a contour region 12q that are slightly different in display color. Each of the regions 12p and 12q includes a large number of solid-state light emitting elements such as organic EL elements, which will be described in detail later. It is formed by arranging in two dimensions. The display area 12a can be switched between a lit state in which light is emitted in blue and its similar colors and a dark unlit state close to black. In the non-display area 12b, a light absorber is disposed instead of the solid light emitting element, and the light is always dark. For this reason, when the display area 12a is in a lighting state, the non-display area 12b is a dark background area surrounding the display area 12a made of blue and its similar colors. On the other hand, when the display area 12a is turned off, the display area 12a and the non-display area 12b, that is, the inside of the rectangular display frame 16, are blackish as a whole.

  A signal control system 100 incorporating the display device 10 of FIG. 1 will be described with reference to FIG. The signal control system 100 is a general traffic light, and includes a signal control device 40, a plurality of pedestrian signal lamps 20, a plurality of vehicle signal lamps 30, and a plurality of sound alarms 50. Here, the signal control device 40 includes a control circuit 41, a drive circuit 42, and a display memory 43. Among these, the control circuit 41 controls the overall operation, and the drive circuit 42 drives the pedestrian signal lamp 20, the vehicle signal lamp 30, and the like based on instructions from the control circuit 41, and displays the memory 43. Stores information on the lighting state such as the current lamp color and the remaining display time, in addition to the procedure for switching the display of the signal lamps 20 and 30.

In the signal control system 100, the pedestrian signal lamp 20 corresponds to the display device 10 shown in FIG. Each pedestrian signal lamp 20 or display device 10 includes an attached circuit 10f that supplies power when the two color lamp sections (first and second lamps 11 and 12) are individually and alternatively sequentially turned on. Is built-in. A combination of the pedestrian signal lamp 20 and the signal control device 40 is a pedestrian traffic light.
On the other hand, the vehicular signal lamp 30 is a general one provided for a vehicle, and although detailed explanation is omitted, a circular lamp portion of three colors, that is, a red lamp 31, a blue lamp 32, and a yellow lamp 33, Is provided. Each vehicle signal lamp 30 incorporates an auxiliary circuit 30f that supplies power when the three color lamp sections 31, 32, 33 are individually and alternatively turned on sequentially. Each color lamp portion 31, 32, 33 is a two-dimensional array of a large number of solid state light emitting elements made of LEDs or the like. A combination of the vehicle signal lamp 30 and the signal control device 40 is referred to as a vehicle signal device.
The sound alarm 50 includes a speaker and a drive circuit. The sound alarm 50 operates in synchronization with the signal lamps 20 and 30 based on an instruction from the signal control device 40. Specifically, for example, when the pedestrian signal lamp 20 is in a state in which a progress impossible signal is displayed, a voice guidance or warning sound prohibiting crossing is output, and the pedestrian signal lamp 20 displays a progress permission signal. When it is in a state of being allowed to cross, voice guidance and guidance sound that allow crossing are output.

With reference to FIG. 3 (A), the pattern-shaped display area 11a provided in the 1st lamp | ramp 11 of the display apparatus (signal light device for pedestrians) 10 shown in FIG. 1 is demonstrated. Here, FIG. 3A is a conceptual diagram in which a partial AP such as the display area 11a is enlarged. Of the display area 11a, in the main area 11p, the basic light emitting device 17a is arranged so as to fill the whole, and in the outline area 11q, the additional light emitting device 17b is arranged so as to be filled.
The basic light emitting device 17a can be a single light emitting device in the entire main region 11p, but the main region 11p can be divided into a plurality of partial regions, and a light emitting device can be assigned to each partial region. That is, it is only necessary to fill the main region 11p substantially uniformly, and the number of divisions and the arrangement density of the basic light emitting devices 17a can be appropriately increased or decreased depending on the situation.
The additional light emitting device 17b can be a single light emitting device for the entire contour region 11q, but the contour region 11q can be divided into a plurality of partial regions, and a light emitting device can be assigned to each partial region. That is, it is only necessary to fill the contour region 11q substantially uniformly, and the number of divisions and the arrangement density of the additional light emitting devices 17b can be appropriately increased or decreased depending on the situation.

The outline region 11q is a continuous band-like region and has a substantially uniform width. The contour region 11q is thinner than the portion where the main region 11p is the thinnest. That is, the width W2 of the contour region 11q is smaller than the width W1 of the portion where the main region 11p is the thinnest. As a result, a sufficient area of the main region 11p can be secured, and it is possible to prevent the main region 11p from being difficult to confirm or the main region 11p from being thinned and greatly changing the overall pattern impression. Further, it is desirable that the width W2 of the contour region 11q is such that the pattern of the contour region 11q can be confirmed even when viewed from a distance.
The area ratio between the main region 11p in which the basic light emitting device 17a is arranged and the contour region 11q in which the additional light emitting device 17b is arranged can be appropriately set according to the luminance of the main region 11p and the contour region 11q.

  The basic light emitting device 17a is a first type organic EL element and emits red light, which is a basic color. Specifically, the basic light emitting device 17a emits light in a long wavelength region having a wavelength of 620 to 650 nm or longer (see distribution A1 in FIG. 4). The additional light emitting device 17b is a second type organic EL element, and emits orange light as an additional color. Specifically, the additional light emitting device 17b emits light at a wavelength of 580 to 600 nm or a wavelength region around it (see distribution A2 in FIG. 4). Note that orange is a similar color of red and has a hue difference of 90 ° or less in the HSV color space.

FIG. 5 is a conceptual diagram illustrating a cross-sectional structure of the basic light emitting device 17a constituting the main region 11p of the display device 10. In the basic light emitting device 17a, an organic EL element 80a having a structure in which an organic EL layer 82 is sandwiched between a pair of electrodes 83 and 84 is formed on a resin substrate 81 as a light emitting element, and a transparent resin protective layer 85 is used. It's covered. Here, at least the front electrode 84 is a transparent electrode. In consideration of directivity, divergence, and the like, a light control unit 88 such as a microlens array or a Fresnel lens can be provided adjacent to the protective layer 85.
The light emission color of the basic light emitting device 17a constituting the main region 11p can be adjusted by selecting a fluorescent material or other light emitting material added to the organic EL layer 82. For the organic EL element 80a, a filter can be added to cut off unnecessary light.

  The cross-sectional structure of the additional light-emitting device 17b constituting the contour region 11q is the same as the cross-sectional structure of the basic light-emitting device 17a, and a description thereof will be omitted. In the case of the additional light emitting device 17b, the components of the organic EL layer 82 are different from those of the basic light emitting device 17a.

  As described above, in the display area 11a of the first lamp 11, when it is turned on, the red light emitting basic light emitting device 17a having a wavelength exceeding 620 nm emits light in the inner main area 11p, and the wavelength 580 in the outer outline area 11q. The additional light emitting device 17b of the orange light emitting type around ˜600 nm emits light. Furthermore, the basic light emitting device 17a emits light by being arranged in the main region 11p having a relatively large occupied area, and the additional light emitting device 17b emits light by being arranged in the contour region 11q having a relatively small occupied area. For this reason, the display area 11a is recognized as a silhouette pattern of a stopped pedestrian colored in substantially red, with the majority of the display area 11a being red and the periphery oozing orange (similar colors). In the following, the stimulus sensitivity of a healthy visual person is used as a reference (see sensitivity pattern B0 in FIG. 4). By the way, the first color vision peculiar person called P-type intensity hardly feels red (see sensitivity pattern B1 in FIG. 4), and cannot feel light from the basic light emitting device 17a. On the other hand, the light from the additional light emitting device 17b can feel light emission as light belonging to yellow or green although the density of the light emitting region is low. Therefore, for the first color vision peculiar person with P-type intensity, the display region 11a is recognized as a contour pattern of a stopped pedestrian colored yellow or the like in a contour region 11q having a certain width. Further, the second color vision peculiar person who is called P-type weakness has low red sensitivity (see sensitivity pattern B2 in FIG. 4), and low sensitivity to light from the basic light emitting device 17a. On the other hand, the light from the additional light emitting device 17b can feel light emission as light belonging to yellow. Therefore, for the second color vision peculiar person with P-type weakness, the display area 11a is recognized as a contour pattern of a stopped pedestrian colored yellow or orange in the contour area 11q having a certain width, and the main area 11p is recognized as a silhouette pattern colored in a relatively dark orange color or the like. That is, even a color vision peculiar person with P-type intensity or P-type weakness can recognize the presence or absence of a pattern in the display area 11 a of the first lamp 11.

  The above is the description of the first lamp 11, but the same device can be applied to the second lamp 12. Specifically, in the display area 12a of the second lamp 12, a main area 11p in which the basic light emitting device 17a is arranged and an outline area 11q in which the additional light emitting device 17b is arranged are provided. In the second lamp 12, the basic light emitting device 17a in the main region 11p emits blue light and emits light in a short wavelength region around a wavelength of 400 to 450 nm, and the additional light emitting device 17b in the contour region 11q has a wavelength of 450 to 500 nm. It emits light in the long blue area. The third color vision peculiar person who is called T type can hardly feel blue and cannot feel light from the basic light emitting device 17a. On the other hand, the light from the additional light emitting device 17b can feel light emission as light belonging to green although the density of the light emitting region is low. Therefore, for the T-type third color vision peculiar person, the display region 12a is recognized as a contour pattern of a crossing person colored in green. That is, even a T-type color vision peculiar person can recognize the presence or absence of a pattern in the display area 12 a of the second lamp 12.

FIG. 3B shows a modification of the display area 11a shown in FIG. Again, in the display area 11a, in the main region 11p, the basic light emitting device 17a is disposed so as to fill the whole, the outline area 11q, additional light-emitting device 17b is disposed in a strip shape continuously substantially without breaks . However, the basic light emitting device 17a is composed of a plurality of red light emitting LED elements that emit light in a wavelength region exceeding the wavelength of 620 nm, instead of the organic EL elements. Further, the additional light emitting device 17b is also composed of a plurality of orange light emitting LED elements that emit light in a wavelength region around a wavelength of 580 to 600 nm. The light emitting device 17a shown in FIG. 3 (B), for 17b, not limited to the LED element can be replaced with an organic EL device of similar sequences.

  As described above, according to the display device 10 according to the present embodiment, the additional light emitting device 17b that can be recognized by the color vision peculiar person is arranged in the contour region 11q of the predetermined pattern. A predetermined pattern including the contour displayed in the region 11a can be recognized as a signal. Further, the general color sense person can recognize the contour area 11q of the predetermined pattern as a signal equivalent to or substantially the same as the predetermined pattern.

  The structure, shape, size, and arrangement relationship described in the above embodiments are merely schematically shown to the extent that the present invention can be understood and implemented. Therefore, the present invention is not limited to the described embodiments, and can be variously modified without departing from the scope of the technical idea shown in the claims.

The pattern-like display areas 11a and 12a are not limited to figures, signs, etc., but can be characters, symbols, or the like.
Specifically, as shown in FIG. 6, for example, one or more information display devices 60 are added to the signal control system 100 and operated in conjunction with the pedestrian signal lamp 20 or the vehicle signal lamp 30. At this time, the information display device 60 displays traffic-related information expressed by characters, symbols, and the like, and thus a display portion 111 made of a light emitting element such as an organic EL element, and a drive circuit 60f that causes the display portion 111 to perform drawing. With. In the display area 111a, which is a pattern that changes by itself, the display portion 111 emits a red light emitting basic light emitting device having a wavelength exceeding 620 nm as a pixel, and an orange light emitting additional light emitting device around a wavelength of 580 to 600 nm. Light is emitted as a pixel (see FIG. 3A). In the non-display area 111b outside the display area 111a, the basic light emitting device and the additional light emitting device constituting the pixel are turned off. The display area 111a corresponds to characters, symbols, and the like, and can be a dynamic one that changes as traffic related information to be displayed changes. For example, the traffic-related information can be used to explain the status of permission or non-promotion of the traffic light, but is not limited to this, and can also indicate the occurrence of an accident, traffic restriction section, traffic jam, commercials, etc. .
Although detailed illustration is omitted, the inner main area of the display area 111a is displayed by turning on only the basic light emitting device, and the outer outline area of the display area 111a is displayed by turning on only the additional light emitting device. . That is, the visually-impaired person recognizes the display area 111a as a pattern of characters or the like colored in red with an outline drawn in orange, and the visually peculiar person recognizes the display area 111a as an outline pattern colored in yellow or the like. .

  In the above embodiment, the additional light emitting device 17b emits orange light as an additional color. However, the additional light emitting device 17b has yellow light (or two kinds of additional light emitting devices 17b of yellow or orange). Light) can also be emitted.

  In the example of FIG. 1, it is assumed that there is one pattern in the display area 11a, but there may be two patterns in the display area 11a. In this case, each pattern has a main area and a contour area. Provided.

  The main region 11p or the contour region 11q does not need to be composed of only a solid-state light emitting element that emits a single type of light. For example, in the main region 11p, the additional light emitting devices 17b can be scattered with a small occupied area ratio in the gap between the basic light emitting devices 17a.

  DESCRIPTION OF SYMBOLS 10 ... Display apparatus, 10f ... Attached circuit, 11, 12 ... Lamp part, 11a, 12a ... Display area, 11b, 12b ... Non-display area, 11p ... Display part, 14 ... Cover, 15, 16 ... Display frame, 17a ... basic light emitting device, 17b ... additional light emitting device, 17c, 17d ... light emitting area, 20 ... pedestrian signal lamp, 30 ... vehicle signal lamp, 30f ... accessory circuit, 31, 32, 33 ... lamp section, 40 ... Signal control device 41 ... Control circuit 42 ... Drive circuit 43 ... Display memory 50 ... Audio alarm 60 ... Information display device 100 ... Signal control system 111 ... Display part 111a ... Display area 111b ... Non-display area, 11p, 12p ... main area, 11q, 12q ... contour area

Claims (6)

A display area formed in a local area within the display frame and displaying a predetermined pattern ;
A non-display area surrounding the display area ,
A basic light emitting device that emits light of a basic color for a general color person is disposed in a main area excluding the outline of the predetermined pattern, and light of an additional color that can be recognized by a color vision person in the outline area of the predetermined pattern Arrange additional light emitting devices to inject ,
A signal display device in which a light absorber is disposed in the non-display area .   The signal display according to claim 1, wherein the contour region is a substantially unbroken band-shaped region, and the width of the band-shaped region is narrower than a portion in which the main region is narrowest. apparatus.   3. The signal display device according to claim 1, wherein the basic color and the additional color are similar colors. 4.   4. The signal display according to claim 1, wherein the basic light emitting device and the additional light emitting device are solid-state light emitting elements, and at least the basic light emitting devices are arranged two-dimensionally. 5. apparatus. The display area is provided in the pedestrian traffic, a display device for signal according to any one of claims 1-4. The display device for signals according to any one of claims 1 to 4 , wherein the display area is provided in an information display device attached to a traffic signal device.

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