JPH07199836A - Display device - Google Patents

Abstract

PURPOSE:To reduce power consumption, to make bright multicolor display and to display bright images even when the images are viewed from various directions in natural display by visual sensation with the display device which is capable of brightly displaying particularly the various patterns on an advertisement display, etc., as a large screen. CONSTITUTION:This display device is mounted with triangular columnar members T1 to T3 freely turnably around their central axes and are adjacently disposed with a plurality of these mounted triangular columnar members T1 to T3. One pixel is formed of a blue display member T1 colored to white WH, black BL and blue B on the three side faces of the triangular columnar members T1 to T3, a red display member T2 colored to white WH, black BL and red R on the three side faces and a yellow display member T3 colored to white WH, black BL and yellow Y on the three side faces. These pixels are disposed in a matrix form. Further, the blue colored surfaces of the blue color display members T1 are colored by mixing phosphors EB which emit blue fluorescence therewith; the red colored surfaces of the red color display members T2 are colored by mixing phosphors ER which emit red fluorescence therewith and the yellow colored surfaces of the yellow color display members T3 are colored by mixing phosphors EG which emit green fluorescence therewith.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device for displaying advertisements and the like on a large screen, and more particularly to a display device capable of clearly displaying various patterns.

[0002]

2. Description of the Related Art Conventionally, as a display device provided on a wall surface of a building or the like for displaying advertisements, a light-emitting display device that displays by emitting light from the device itself and light from the outside such as sunlight or a lighting device 2 of the light-receiving type display device that performs the display
There were types.

A light emitting display device is a light emitting tube as a pixel,
LED (Light Emitting Diode)
A large number of light emitting elements such as the above are arranged in a matrix, and only the arc tubes or LEDs corresponding to the display pattern are selectively turned on, whereby patterns of various colors are displayed by additive color mixing. The light-receiving display device is configured such that, for example, the side surfaces of a square pole are colored white, red, blue, and green so that the square pole can rotate about the central axis of the square pole, and the square pole is arranged in a matrix as one pixel. Four colors are displayed by arranging a large number of them and rotating each quadrangular prism in accordance with the display pattern so that one of the side faces is aligned with the display surface.

[0004]

Since the conventional display device is constructed as described above, in order to display the pattern clearly in the light emitting display device even when the surroundings are bright such as in direct sunlight. , Arc tube or LE as each pixel
There is a problem in that it is necessary to increase the brightness of D and power consumption increases. Further, in order to prevent the display screen from being difficult to see due to the light reflected by the display surface due to the incidence of the external light, a light shielding plate may be provided to limit the external light entering the display surface. In this case, there is a problem that the field of view of the display surface becomes narrow.

Further, the above conventional light-receiving display device has a problem that it is easy to see when the surroundings are bright, but illumination is required at night. Further, the number of display colors is limited by the applied color, and in the above case, there is a problem that only four colors can be displayed. Furthermore, in any of the conventional devices, a perceptually natural display that matches human visual characteristics is not performed, and a clear image can be displayed not only in a specific direction but also in various directions. could not.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a display device which can reduce power consumption and can perform clear multicolor display. The second purpose is
An object of the present invention is to provide a display device capable of displaying a clear image even when viewed from various directions with a perceptually more natural display.

[0007]

In a display device according to the present invention, a triangular columnar member is rotatably attached about a central axis connecting a top surface and a bottom surface thereof, and a plurality of the attached triangular columnar members are adjacent to each other. The three side surfaces of the triangular columnar member are colored white, black, and blue, the three side surfaces are white, black, and the red display member is colored red, and the three side surfaces are white. One pixel is formed by a black and yellow colored yellow display member, and the pixels are arranged in a matrix.

Further, according to the present invention, if necessary, the blue colored surface of the blue display member is mixed with a fluorescent substance that emits blue fluorescence for coloring, and the red colored surface of the red display member emits red fluorescence. A phosphor is mixed and colored, and a phosphor that emits green fluorescence is mixed and colored on the yellow colored surface of the yellow display member. Further, the present invention, if necessary, a fluorescent substance that emits the blue fluorescence of a phosphor amount less than the phosphor amount mixed in the blue colored surface of the blue display member on the white colored surface of the blue display member. Mixing and coloring, mixing and coloring the white colored surface of the red display member with a phosphor that emits the red fluorescence in a phosphor amount less than the phosphor amount mixed in the red colored surface of the red display member. Then, a phosphor that emits the green fluorescence with a phosphor amount less than the phosphor amount mixed in the yellow colored surface of the yellow display member is mixed and colored in the white colored surface of the yellow display member. .

Further, according to the present invention, the pixel is formed of four divided areas, and a blue display member and a red display are arranged in one of the intersecting areas of the four divided areas, and two yellow areas are provided in the other. A display member is provided. Furthermore, according to the present invention, the surfaces of the three side surfaces of the triangular prism may be formed in a curved convex shape, if necessary.

[0010]

In the present invention, the blue display member, the red display member, and the yellow display member are independently rotated about their central axes, and one of the side surfaces is used as the display color of the pixel, whereby the blue and red display members are displayed. Since it is possible to display in a mixed color of yellow, white, and black, any pattern can be displayed in multiple colors as a clear image. Further, in the present invention, by irradiating with ultraviolet rays or the like at night, it is possible to emit blue, red and green fluorescence, and it is possible to display in a subtractive color mixture of blue, red and green, an arbitrary pattern is electrically It is possible to perform multicolor display without using the light emission drive means.

Further, in the present invention, when blue fluorescent display is performed, a white colored surface is used for display instead of the blue colored surface of the blue display member, so that blue fluorescent light with a small amount of emitted light is used. it can. Further, in the case of performing red fluorescent display, by using a white colored surface for display instead of the red colored surface of the red display member, red fluorescent light with a small amount of emitted light can be used. Further, when performing green fluorescent display, by using a white colored surface for display instead of the yellow colored surface of the yellow display member, it is possible to use green fluorescent light with a small amount of emitted light. Therefore, multi-tone multi-color display can be performed by subtractive color mixing of blue, red, green, black, light blue, light red and light green.

Furthermore, in the present invention, one pixel has a yellow display member containing a large amount of green component, which has a low perceptual ability due to human visual characteristics, and has a double area as compared with the other display member. To match the human visual characteristics,
Perceptually more natural multicolor display is possible. Further, in the present invention, a diffused reflection state can be formed even for a light ray projected from a specific direction such as sunlight, and a clear image can be displayed in all directions.

[0013]

【Example】

(One Embodiment of the Present Invention) One embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows a schematic configuration of the display surface of the display device of the first embodiment. In the figure, the display device 1
Is a configuration having a display surface 2 in which a large number of rectangular pixels 3 are arranged in a matrix.

Each pixel 3 arranged in large numbers in this matrix
Is composed of three triangular column members, a blue display member T1 for displaying blue, a red display member T2 for displaying red, and a yellow display member T3 for displaying yellow.
1, T2, T3 are attached adjacent to the rotation axis S so as to be rotatable around a central axis connecting the apex and the bottom surface of the triangular prism. Here, the schematic configuration of the display device will be described with reference to FIG.

The display device 1 stores a display control unit 10 for controlling the entire display device, an input device 11 such as a keyboard, an image scanner and a mouse for inputting various data, a control program for the display control unit 10 and the like. First memory 12 and a second memory 13 that is randomly accessible and stores display data, data relating to the current display state, etc.
And drive motors M1, M2 such as stepping motors for driving the corresponding pixels 3 under the control of the display controller 10.
, And the rotation of the rotary shaft S of the drive motors M1, M2, ... Rotates each of the display members T1, T2, T3 constituting the pixels corresponding to the drive motors M1, M2 ,. Control units 14-1 and 14-
2, and an ultraviolet lamp 15 for irradiating the display surface 2 with ultraviolet rays at night.

Next, a specific example of the pixel 3 will be described with reference to FIG. As described above, the pixel 3 has the blue display member T1,
The red display member T2 and the yellow display member T3 are composed of three triangular pillar members, and the three side surfaces of the blue display member T1 are colored white WH, black BL, and blue B, and the three side surfaces of the red display member are , White WH, black BL, red R, and three side surfaces of the yellow display member are colored white WH, black BL, and yellow Y.

Further, the blue B colored surface of the blue display member T1 is coated with a mixture of blue fluorescent paint EB which emits blue fluorescence when irradiated with ultraviolet rays. Similarly, the red R colored surface of the red display member T2 is mixed and applied with the red fluorescent paint ER that emits red fluorescence when irradiated with ultraviolet rays. Further, a green fluorescent paint EG, which emits green fluorescence when irradiated with ultraviolet rays, is mixed and applied to the yellow Y colored surface of the yellow display member T3. In this case, each fluorescent paint EB, ER, E
Since G is white in the daytime, it does not affect the color of each colored surface.

Each display member T1, T2, T3 is shown in FIG.
As shown in, the support through holes T1a, T2b, and T3c are attached to the rotation shaft S in a loosely fitted state, and the rotation shaft S is attached to a stepping motor that is a drive motor M (1, 2, ...). There is. A rotation control unit 14 (-1, -2, ...) Is provided in the rear of the display members T1, T2, T3 toward the display surface 2. As a result, the display members T1, T2, which are not desired to be rotated,
As for T3, that is, the display members T1, T2, and T3 whose display color does not need to be changed, the stopper abuts and the display member is not rotated, so that the display color remains as it is. For example, in FIG. 4A, the stoppers ST1 and ST3 corresponding to the blue display member T1 and the yellow display member T3 are in contact with the respective display members T1 and T3,
The stopper ST2 corresponding to the red display member T2 is the display member T.
Not in contact with 1. Therefore, the rotation axis S is shown in FIG.
When rotating in the rotation direction indicated by the arrow in (a), only the red display member T2 rotates.

More specifically, for the blue display member T1 and the yellow display member T3, as shown in FIG. 4 (b), the corresponding stoppers ST1 and ST3 come into contact with each other to suppress their rotation, and the rotation shaft S slides on the inner side walls of the support through holes T1a and T3c, and only the rotation axis S rotates while the display members T1 and T3 remain the same. On the other hand, for the red display member T ₂ , as shown in FIG. 4C, the corresponding stopper ST ₂ is housed in the rotation control unit 14 and separated from the display member T ₂ . As a result, the display member T ₂ rotates in the same direction as the rotation shaft S rotates.

Next, the display operation will be described separately for daytime and nighttime. First, regarding the daytime display operation, the display device 1 operates as a light receiving display device.
Regarding the number of display colors in the daytime, the blue display member T1, the red display member T2 and the yellow display member T as described above are used.
When the combination of colors in the case of forming the pixel 3 by using each one of 3 is calculated, it becomes 3 × 3 × 3 = 27 (varies) as shown in FIG.

However, among the combinations of these colors, the combinations in which the displayed positions are different but the same colors are combined, for example, the combination of blue-black-yellow is different from the combination of black-blue-yellow. Excluding the combinations and the like, there are substantially 20 color combinations.

Next, the general operation of the display device 10 will be described.
Display data is previously stored in the second memory 13 via the input device 11.
Stored in the first memory 12
The pixel 3 whose display color needs to be changed is identified based on the current display state data and display data stored in the second memory 13 based on the control program stored in By controlling the control unit 14 to drive the stoppers ST1, ST2, ST3 to predetermined positions,
In parallel with this, the corresponding drive motor M is driven to rotate the rotary shaft S.

As a result, the pixel 3 is a combination of colors corresponding to the display data, and it is possible to display a free pattern with 20 display colors. Next, regarding the nighttime display operation, this display device operates as a light emitting display device. In this case, the operation of the mechanical drive part is the same as that in the daytime, but in order to make each pixel 3 emit light, it is necessary to irradiate ultraviolet rays using an ultraviolet lamp 15 which is a so-called black light. Therefore, the display control unit 10 determines that it is necessary to perform nighttime display by a time setting (not shown) or a sensor that detects the brightness around the display surface, and turns on the ultraviolet lamp 15.

As a result, the blue fluorescent paint EB on the blue B colored surface of the blue display member T1 emits blue fluorescence, and similarly, the red fluorescent paint ER on the red R colored surface of the red display member T2 emits red fluorescence. Further, the green fluorescent paint EG on the yellow Y colored surface of the yellow display member T3 emits green fluorescence. Therefore, R (red), G (green), B (blu
The subtractive color mixture display using the three primary colors of e) can be performed. In this case, unlike the daytime, white can be expressed by R, G, and B, so that each display member T ₁ ,
Although the white WH colored surfaces of T ₂ and T ₃ are not used for display, the black BL colored surface is used for display in order to express perfect black.

(Second Embodiment of the Invention) In the first embodiment described above, in the case of display at night, multicolor display was possible, but the brightness was the light intensity of the ultraviolet lamp 15 and each fluorescent light. It was difficult to express gradation depending on the amount of paint mixed. Therefore, in the second embodiment, gradation expression is performed together with multicolor display. Specifically, in addition to the configuration of the first embodiment, the same white fluorescent paint as the white WH colored surface of the display member, which is not used in the first embodiment, is mixed with the other colored surface of the display member. The fluorescent paint is mixed in a small amount (for example, about 50 to 70%), and one of the mixed surfaces of the fluorescent paint is selected for display.

More specifically, as shown in FIG. 6, a blue fluorescent coating EB that emits blue fluorescence when irradiated with ultraviolet rays is mixed and applied to the blue B colored surface of the blue display member T1. On the colored surface of white WH, the same blue fluorescent paint as that on the colored surface of blue B is applied as a blue fluorescent paint EB 'with a small mixing amount. Similarly, the red R colored surface of the red display member T2 is mixed with the red fluorescent paint ER that emits red fluorescence when irradiated with ultraviolet rays, and the white WH colored surface has a red R colored surface. The same blue fluorescent paint is applied as a red fluorescent paint ER 'with a small amount mixed.

Further, a green fluorescent paint EG which emits green fluorescence when irradiated with ultraviolet rays is mixed and applied to the yellow Y colored surface of the yellow display member T3, and the yellow Y colored surface is colored WH. The same blue fluorescent paint as the colored surface is applied as the green fluorescent paint EG 'with a small amount mixed. Even in this case, each fluorescent paint EB, E
Since B ′, ER, ER ′, EG, and EG ′ are white in the daytime, the color of each colored surface is not so affected. As a result, for example, when displaying blue B, it is possible to express the gradation of the blue component by selecting which of the blue B colored surface and the white WH colored surface is used.

(Third Embodiment of the Present Invention) The third embodiment of the present invention is an embodiment in which a display is made in accordance with the human visual characteristics.
The human retina has a low perceptual ability for green.
As a result, the amount of green light that is actually perceived and perceived is low even though the amount of light is optically the same.
Therefore, in the third embodiment, a pixel is formed from four divided regions, and as shown in FIG. 7A, two pixels are formed in one of the intersecting regions of the yellow display member T3 containing many green wavelength components.
One is arranged, and the blue display member and the red display member are arranged in the other intersecting region.

As shown in FIG. 7B, the entire display device has a large number of rectangular pixels 3'arranged in a matrix on the display surface 2'of the display device 1 '. Each pixel 3 '
Is the blue display member T1 and the red display member T2 as described above.
And yellow display members T31 and T32. In this case, as in the first embodiment, the three side surfaces of the blue display member T ₁ are white WH and black B
L and blue B are colored, and the three side surfaces of the red display member T2 are
White WH, black BL, and red R are colored, and three side surfaces of the yellow display members T31 and T32 are colored white WH, black BL, and yellow Y, respectively. Further, on the blue B colored surface of the blue display member T1, a blue fluorescent paint EB that emits blue fluorescence when irradiated with ultraviolet rays is mixed and applied.

Similarly, a red fluorescent paint ER which emits red fluorescence when irradiated with ultraviolet rays is mixed and applied to the red R colored surface of the red display member T2. Further, on the yellow Y colored surfaces of the yellow display members T31 and T32, a green fluorescent paint EG that emits green fluorescence when irradiated with ultraviolet rays is mixed and applied, and each fluorescent paint EB, E
Since R and EG are white in the daytime, the color of each colored surface is not so affected. As a result, it is possible to perform a natural color display that matches the human visual characteristics.

(Fourth Embodiment of the Present Invention) In each of the above embodiments, the side surface of the triangular prismatic member is a flat surface, but in the fourth embodiment, the side surface of the triangular prismatic member is curved and convex. The display is made easier to see by forming. When the side surface (colored surface) of the triangular prismatic member that is a pixel is formed flat, the light incident on the side surface that is the display surface is reflected only in a specific direction, and the display surface is observed from a direction other than the specific direction. Then, whitening occurs and the screen display becomes unclear.

Therefore, in the fourth embodiment, as shown in the perspective view of FIG. 8A and the side view of FIG. 8B, a blue display member T1 ', a red display member T2', and a yellow display member T3. The side surface of the triangular columnar member that constitutes the'is formed in a curved convex shape. As a result, it becomes a diffuse reflection state even for light rays such as sunlight that enter the display surface from a specific direction, and even if the display surface is observed from any direction, an averaged clear image display is performed. Become.

(Other Embodiments of the Present Invention) In each of the above embodiments, the rotary shaft is directly rotated by the drive motor such as a stepping motor, but it is configured to be indirectly driven by using a gear. It is also possible to do so. In this case, one drive motor may be connected to a plurality of pixels via a gear, and the gears may be sequentially switched to drive. It is also possible to provide a drive motor for each display member and drive each display member independently.

[0034]

As described above, in the present invention, the blue display member, the red display member, and the yellow display member are independently rotated about their central axes, and either side surface is used as the display color of the pixel. By doing so, it will be possible to display with additive color mixture of blue, red, yellow, white and black,
It is possible to display an arbitrary pattern as a clear image in multiple colors. . Further, in the present invention, by irradiating with ultraviolet rays or the like at night, it is possible to emit blue, red and green fluorescence, and it is possible to display in a subtractive color mixture of blue, red and green, an arbitrary pattern is electrically It has an effect of performing multicolor display without using the light emission drive means. Further, in the present invention, there is an effect that multi-color multi-color display can be easily performed by subtractive color mixture of blue, red, green, black, light blue, light red and light green. Furthermore, in the present invention, one pixel has a yellow display member containing a large amount of green component, which has low perceptual ability due to human visual characteristics, in an area twice as large as that of the other display member, so that the color balance of the human being is improved. It has the effect of adapting to the visual characteristics and enabling a perceptually more natural multicolor display. Further, the present invention has an effect that a diffused reflection state can be formed even for a light ray projected from a specific direction such as sunlight, and a clear image can be displayed in all directions.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a display surface of a display device according to an exemplary embodiment of the present invention.

FIG. 2 is a block diagram showing a schematic configuration of a display device according to an embodiment of the present invention.

FIG. 3 is a perspective view showing a configuration of a display member according to an embodiment of the present invention.

FIG. 4 is a diagram illustrating an operating state of the display member according to the embodiment of the present invention.

FIG. 5 is a diagram illustrating a combination of display colors in the display device according to the embodiment of the present invention.

FIG. 6 is a perspective view showing a configuration of a display drawing member according to a second embodiment of the present invention.

FIG. 7 is a perspective view showing the configuration of a display member according to a third embodiment of the present invention.

FIG. 8 is a perspective view showing a configuration of a display member according to a fourth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Display device 2 ... Display surface 3 ... Pixel 10 ... Display control part 10 11 ... Input device 11 12 ... 1st memory 12 13 ... 2nd memory 13 14-1, 14-2 ... Rotation control part 15 ... Ultraviolet lamp 15 EB, EB '... Blue fluorescent paint ER, ER' ... Red fluorescent paint EG, EG '... Green fluorescent paint M1, M2 ... Drive motors ST1, ST2, ST3 ... Stopper T1 ... Blue display member T2 ... Red display member T3, T31 , T32 ... Yellow display member

Claims (5)

[Claims] 1. A triangular prism member is rotatably mounted about a central axis of the triangular prism, a plurality of the triangular prisms mounted are arranged adjacent to each other, and three side faces of the triangular prism member are white, black, and blue. Forming a pixel with a blue display member colored to, a red display member having the three side surfaces colored white, black, and red, and a yellow display member having the three side surfaces colored white, black, and yellow, A display device having pixels arranged in a matrix. 2. The display device according to claim 1, wherein the blue colored surface of the blue display member is mixed with a phosphor that emits blue fluorescence to be colored, and the red colored surface of the red display member is colored red. A display device, characterized in that a fluorescent substance that emits fluorescence is mixed and colored, and a fluorescent substance that emits green fluorescent light is mixed and colored on the yellow colored surface of the yellow display member. 3. The display device according to claim 2, wherein the phosphor that emits the blue fluorescent light in an amount less than the amount of the phosphor mixed in the blue colored surface of the blue display member is used as the blue display member. The white colored surface of the red display member is colored by mixing and coloring the white colored surface of the red display member with a phosphor amount that is less than the phosphor amount mixed in the red colored surface of the red display member. The surface is mixed and colored, and a phosphor that emits the green fluorescence with a phosphor amount less than the phosphor amount mixed in the yellow colored surface of the yellow display member is mixed with the white colored surface of the yellow display member. A display device characterized by being colored. 4. The display device according to claim 1, wherein the pixel is formed of four divided regions, and a blue display member and a red display are provided in one of the intersecting regions of the four divided regions. And a two yellow display member on the other side. 5. The display device according to any one of claims 1 to 4, wherein the three side surfaces of the triangular prism are formed in a curved convex shape.