JPS5933032Y2 - display device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a display device using an electrochromic display element (hereinafter referred to as an ECD element).

The ECD element is an electrochromic phenomenon, that is,
This is a display element made of a substance that exhibits a coloring phenomenon caused by voltage or current.

The ECD element has vivid colors and has a memory function (
It is suitable for use as a display element because it can display for a long time without applying a sustaining voltage, but it has the disadvantage that it does not operate at low temperatures.

In consideration of this point, this project proposes an ECU display device that can compensate for temperature drops and also enhance the display effect.The ECU display device is capable of compensating for temperature drops and enhancing the display effect.The ECU display device uses an ECD element that performs display by coloring and erasing each color by applying a positive voltage and a reverse voltage. The display device is characterized by comprising a light source means for irradiating the ECD element with light and applying thermal energy, and a means for detecting the ambient temperature of the element and controlling the energization of the light source means. .

The illustrated embodiment will be described in detail below.

1 is the housing of the display device, 1' is the window of the housing, 2
3 is an ECD element arranged in the window 1', and 3 is a control circuit for the element 2, which causes the element 2 to display predetermined information.

This information is, for example, information on the amount of refueling from a metering machine, such as gasoline, and is given via line 3'.

Reference numeral 4 denotes a heat generating light source, which in FIG. 1 is placed near the back of the ECD element 2.

4' is a reflector of the light source 4. The heat generating light source 4 irradiates the element 2 with light and provides thermal energy.

A temperature detector 5 detects the ambient temperature of the element 2, and when it reaches a set temperature, outputs an output signal to control the opening and closing of the temperature switch 6.

7 is a power source for the heat generating light source 4.

In FIG. 1, the ECD element is placed relatively close to the window 1' of the housing, and the light source is placed behind it to enhance the display effect with transmitted light.
In the figure, the ECD element is placed away from the window 1', the heat generating light source 4a is placed obliquely in front, and the ECD element is irradiated from the front to enhance the display effect by reflected light.

In addition, 9 is a reflective plate.

A second heat generating light source may be provided instead of the reflecting plate 9.

For example, the temperature detector 5 may be configured so that the switch 6 is opened when the ambient temperature exceeds 60°C, and the switch 6 is closed when the ambient temperature is below 60°C, or if it is unnecessary or uneconomical to turn on the light source constantly. For example, the switch 6 may be configured to close when the ambient temperature becomes, for example, 10° C. or lower.

The information displayed on the element 2 may be, for example, the counted value of the amount of refueling from a gasoline meter, but any other information may be used, and it may be not limited to numbers but may also be letters, or may be decorative patterns or designs. Good too.

As described above, according to the present invention, the ECD element is illuminated with a heat-generating light source and the light source is controlled by sensing the ambient temperature, thereby enhancing the display effect of the element and ensuring the normal operation of the element at all times. can do.

[Brief explanation of drawings]

FIGS. 1 and 2 are schematic configuration diagrams showing different embodiments of the present invention. 1...Housing, 1'...Front window,
2... ECD element, 3... Control circuit,
4, 4a... Heat generating light source, 5... Temperature sensor, 6... Temperature switch, 9... Reflection plate.

Claims (1)

[Scope of utility model registration request] A device for displaying information using an electromic display element that performs coloring and erasing display by applying a positive voltage and a reverse voltage, comprising: a light source means for irradiating the display element with light and applying heat energy; and a surrounding area of the display element. A display device further comprising means for detecting temperature and controlling energization of the light source means.