JPH0559493U - Display device - Google Patents

Abstract

(57) [Summary] [Purpose] This is to facilitate the recognition of the display even if fog occurs around the display. [PROBLEMS] To provide a fog density detecting means for detecting the density of fog generated around a display device, and to control the brightness or display mode of the display device according to the fog density detected by the detecting means.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a display device that controls the brightness or display form of the display device according to the concentration of fog around the display device.

[0002]

[Prior Art]

 Conventionally, in this type of display device, a display in which a plurality of display elements such as light emitting diodes are arranged is installed outdoors to transmit and display various information.

[0003]

[Problems to be solved by the device]

 However, when fog was generated around the display due to changes in the weather, it was difficult to recognize the information output from the display if the fog was thick, and accurate information could not be transmitted. The present invention has been made to cope with such a problem, and controls the brightness or display form of the display device according to the density of fog to provide accurate information.

[0004]

[Means for solving the problem]

 In order to solve such a problem, the present invention provides a display in which a plurality of display elements such as light emitting diodes are arranged, a fog concentration detecting means for detecting the fog concentration, and a fog concentration detecting means. And a control means for controlling the brightness or display form of the display according to the concentration of fog.

[0005]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an external perspective view of the display device. The display device main body 1 is mounted and fixed on an upper part of a support column 3 standing on a base 2, and display elements such as light emitting diodes 4, 4, ... The display 5 arranged in a circle is provided, and the information of the circles is displayed by light emission. Reference numeral 6 denotes a solar cell provided on the upper portion of the main body 1, which is used as a driving power source for the display 5 and a control unit described later. Reference numeral 7 is a fog density detecting means for detecting the density of fog generated around the main body 1, which is composed of a light emitting diode and a phototransistor. The light emitted from the light emitting diode is received by the phototransistor. The fog density is detected.

Next, FIG. 2 shows a block diagram of a control unit built in the main body 1, and 8 is a discrimination circuit for receiving a light transmittance signal output from the fog density detecting means and comparing it with a set value. When the transmittance is below the set value, that is, when the fog density is high, a thick fog signal is output to the control circuit 9. A display period setting means 10 sets the display period of the display 5 and outputs a display period signal to the power supply circuit 11. The power supply circuit 11 supplies the power obtained from the solar cell 6 to the respective units 5, 7, 8, 9 during the display period input from the display period setting means 10.

When the dense fog signal is not input from the discrimination circuit 8, the control circuit 9 reduces the current value flowing through the light emitting diodes 4, 4, ... When the concentration signal is input, the current value flowing through the light emitting diodes 4, 4, ..., 4 is increased to raise the brightness of the display 5 so that the displayed contents can be easily seen when a thick fog is generated. As another embodiment, the control circuit 9 turns on all the light emitting diodes 4, 4, ..., 4 when the dense fog signal is not input from the discrimination circuit 8, and conversely when the density signal is input from the discrimination circuit 8. Flashing the light-emitting diodes 4, 4, ..., 4 makes it easier to see the display contents by changing the display form. Further, if the brightness control and the display form control described above are combined, the display can be more easily recognized.

[0008]

[Effect of the device]

 The present invention is configured as described above, and includes a display device in which a plurality of display elements such as light emitting diodes are arranged, a fog concentration detecting unit for detecting the fog concentration, and a fog concentration detected by the fog concentration detecting unit. Accordingly, the display contents can be accurately transmitted without being affected by the presence or absence of fog by providing the control means for controlling the brightness or the display form of the display device.

[Brief description of drawings]

FIG. 1 is an external perspective view of a display device according to an embodiment of the present invention.

FIG. 2 is a block diagram of a control unit in the display device.

[Explanation of symbols]

 5 indicator 7 fog density detection means 9 control circuit corresponding to control means

Claims (1)

[Scope of utility model registration request] 1. A display device in which a plurality of display elements such as light emitting diodes are arranged, and a fog concentration detecting means for detecting the fog concentration.
A display device comprising: a control unit that controls the brightness or the display form of the display according to the fog concentration detected by the fog concentration detection unit.