JP2007171357A - Display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device which can reduce manufacturing cost and running cost. <P>SOLUTION: A display area of a message board 16 is scanned by ultraviolet ray light sources 18 through a scanning driver 20. At this time, the ultraviolet ray light sources 18 emit light to irradiate a rear surface side of the message board 16 and predetermined information is displayed on the message board 16. Thus, the ultraviolet ray light sources 18 are placed in the scanning operation, so that the ultraviolet ray light sources 18 is not required for the entire display area of the message board 16. Consequently, the ultraviolet ray light sources 18 can be reduced in number and made compact, and the running cost of the display device 10 can be reduced. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a display device that displays predetermined information, and more particularly to a display device that uses a phosphorescent panel as a display unit.

2. Description of the Related Art Some conventional display devices have a light emitting source such as an LED fixed to the back side of the display unit, and when the light emitting source emits light, predetermined information is displayed on the display unit. Here, the light emitting sources are widely arranged in a region corresponding to the display area of the display unit, and can display predetermined information in all regions of the display unit.
JP 2003-316304 A

  By the way, in the conventional display device, since the light source is fixed, it is necessary to always provide the light source in a wide range corresponding to the display area of the display unit, and there is a problem that the manufacturing cost increases. In addition, for the above reason, since the light emitting source is enlarged, there is a problem that the running cost of the display device is significantly increased.

  In view of the above circumstances, an object of the present invention is to provide a display device that can reduce manufacturing costs and running costs.

  The invention according to claim 1 is a display unit that displays predetermined information on the front side, a light emitting source that irradiates light to the back side of the display unit, and a display that displays predetermined information on the display unit. And a scan driver that scans the light emitting source over a region.

  According to the first aspect of the present invention, the light emission source is scanned over the display area displaying the predetermined information on the display unit by the scanning drive unit. At this time, the light emission source emits light, and light is irradiated to the back side of the display unit, and predetermined information is displayed on the front side of the display unit. As described above, according to the present invention, since the light emission source is scanned, it is not necessary to previously provide the light emission source over the entire display area of the display unit. Thereby, the number of light emitting sources can be reduced, and the light emitting sources can be reduced in size. As a result, the manufacturing cost of the display device can be reduced, and the running cost of the display device can be reduced.

  According to a second aspect of the present invention, in the display device according to the first aspect, the display unit includes a plurality of phosphorescent phosphors, and the light emitting source is disposed in a direction orthogonal to the scanning direction. A plurality of phosphorescent phosphors are provided corresponding to each of the phosphorescent phosphors.

  According to the second aspect of the present invention, the display unit has a plurality of phosphorescent phosphors, and a plurality of light emitting sources are provided corresponding to the phosphorescent phosphors arranged in a direction orthogonal to the scanning direction. Therefore, it is possible to irradiate light to all the parts of the display area of the display unit only by scanning the light emitting source in a predetermined direction by the scanning drive unit.

  According to the present invention, the manufacturing cost and running cost of a display device can be reduced.

  Next, a display device according to an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIGS. 1 to 3, the display device 10 includes a display unit 12 that is rectangular in front view. The front side of the display unit 12 includes a message board 16 in which a plurality of phosphorescent phosphors 14 are applied in a dot shape and matrix shape on a transparent panel such as glass. Predetermined information is displayed on the front side of the display unit 12. As the phosphorescent phosphor 14, a single color display plate or a material coated with R, G, B (red, green, black) colors is used. In addition, about the material of the phosphorescence fluorescent substance 14, since it is disclosed by above-mentioned patent document 1, the detailed description is abbreviate | omitted.

  In addition, an ultraviolet light source 18 that emits light including ultraviolet light is disposed on the back side of the display unit 12. A plurality of ultraviolet light sources 18 are provided so as to correspond to the respective phosphorescent phosphors 14 arranged in the direction (arrow Y direction in FIG. 1) orthogonal to the scanning direction (arrow X direction in FIG. 1). Yes.

  Each ultraviolet light source 18 is provided in the scanning drive unit 20. The scanning drive unit 20 is controlled by a control unit (not shown) and is configured to be able to move over the entire display area of the message board 16. As a result, the ultraviolet light source 18 is scanned in a predetermined direction (in the direction of arrow X in FIG. 1) with the movement of the scanning drive unit 20, and can irradiate light including ultraviolet light over substantially the entire back side of the message board 16. .

  Next, the operation of the display device 10 of this embodiment will be described.

  As shown in FIGS. 1 to 3, when displaying predetermined information on the message board 16, the scanning drive unit 20 is controlled by a control unit (not shown), and the ultraviolet light source 18 together with the scanning drive unit 20 is scanned in the scanning direction (see FIG. 1). 1 in the direction of arrow X). And when operated to the position corresponding to the phosphorescent phosphor 14 to be issued, the ultraviolet light source 18 emits light and the back side of the message board 16 is irradiated with light, whereby the phosphorescent phosphor 14 is issued and displayed. Predetermined information is displayed on the front side of 12. In this manner, by moving the scanning drive unit 20, light can be irradiated from the ultraviolet light source 18 over the entire display area of the message board 16. For this reason, it is not necessary to provide the ultraviolet light source 18 in advance over the entire display area of the message board 16. Thereby, the number of the ultraviolet light sources 18 can be reduced, and the ultraviolet light source 18 can be reduced in size. As a result, the manufacturing cost of the display device 10 can be reduced, and the running cost of the display device 10 can be reduced.

  In particular, the message board 16 has a plurality of phosphorescent phosphors 14, and the ultraviolet light source 18 is phosphorescent phosphor arranged in a direction (arrow Y direction in FIG. 1) orthogonal to the scanning direction (arrow X direction in FIG. 1). By providing a plurality corresponding to each body, it is possible to irradiate all parts of the display area of the message board 16 only by scanning the ultraviolet light source 18 in a predetermined direction by the scanning drive unit 20. it can.

It is a front view of the display apparatus which concerns on one Embodiment of this invention. It is a longitudinal cross-sectional view of the display apparatus which concerns on one Embodiment of this invention. It is a cross-sectional view of a display device according to an embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Display apparatus 12 Display part 14 Phosphorescent phosphor 18 Ultraviolet light source (light emission source)
20 Scanning drive

Claims (2)

A display unit for displaying predetermined information on the front side;
A light emitting source for irradiating light to the back side of the display unit;
A scanning drive unit that scans the light emission source over a display area that displays predetermined information of the display unit;
A display device comprising: The display unit has a plurality of phosphorescent phosphors,
The display device according to claim 1, wherein a plurality of the light emitting sources are provided corresponding to the phosphorescent phosphors arranged in a direction orthogonal to the scanning direction.

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