JPS5911915B2 - display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a display device capable of displaying data signals in different colors.

When printing numbers with a conventional small digital printer,
For example, when this number belongs to a negative component, it is printed in red, or only the result of an arithmetic operation is printed in a different color.

This color display method is very convenient for determining the state. There is also a display device that uses a liquid crystal and uses a filter to display different colors, but in this case, changing the color depending on the purpose is not very desirable because the mechanism 10 for storing the liquid crystal becomes complicated.

Conventionally, when assigning meaning to a display, a problem has been solved by providing a separate lamp for only the code display or abnormality display to display them separately as much as possible.

15 However, with this method, it is necessary to read the display contents in two or more places and give meaning to them.
There were many opportunities for misjudgment, which led to malfunctions.

The present invention has been made in view of the above-mentioned circumstances, and by selectively outputting pulse signals with different pulse widths based on 90 emission color control signals to drive a plurality of display bodies to which data signals are supplied. It is an object of the present invention to provide a display device that can display data signals in different colors with a simple configuration and eliminates errors in judgment.

Embodiments of the present invention will be described below with reference to the drawings.

First, in the apparatus of the present invention, a light emitting element as shown in FIG. 1 is used. The figure shows a 110th embodiment in which a 7-segment type display using 7 light-emitting elements is formed.
That is, one light-emitting element includes an infrared light-emitting section 10a that emits infrared light in response to an electric signal, and an infrared light-emitting section 10a that receives infrared light and converts it into short-wavelength light by changing the infrared light pulse width. It consists of a wavelength converter 10b that emits different colors. Here, at f5, the infrared light emitting part 10a is, for example, potassium arsenic (
A light emitting diode (GaAs) or the like is used, and this diode emits a near-infrared pulse having a wavelength of about 1 micron in response to the electrical signal, that is, the scanning frequency.

Note that the infrared light emitting section 10a is not limited to the gallium arsenide light emitting diode, and the value of the wavelength of 1 micron is shown for convenience of explanation. Furthermore, the wavelength converter 10b is made of, for example, lanthanum gallium oxide (LaGaO3 yttrium oxychloride (YOC)) containing ytterbium (Yb) and erbium (Er), and the infrared light emitting part 10a described above is
It receives infrared light with a wavelength of approximately 1 micron from the center and emits red visible light at edges centered at 0.54 micron and 0.66 micron.

Note that the above-mentioned light emitting element is already known (Japanese Patent Publication No. 5596/1983). Thus, one character or number is displayed by a display body consisting of seven light-emitting elements shown in FIG. 1 arranged in a predetermined pattern.

Next, FIG. 2 shows a display device that performs dynamic lighting display using a display body made of the above-mentioned light emitting elements.

In the figure, numeral 11 is a signal generator that generates a pulse signal, and this pulse signal can be either a fixed type or a variable type. The output side of this signal generator 11 has a predetermined frequency division ratio of 1/
A frequency divider 12 that divides the frequency by N is connected, and the frequency-divided signal is supplied to a switching gate circuit 13. Further, a pulse signal is also directly supplied to this switching gate circuit 13 from the signal generator 11. Thus, the switching gate circuit 13 is adapted to selectively output one of the signals from the frequency divider 12 and the signal generator 11 in response to an external emission color control signal. Note that in the case of displaying a display body, which will be described later, in one specific color, it is not necessarily necessary to supply a plurality of signals to the switching gate circuit 13. A scanning circuit 14 is connected to the output side of the switching gate circuit 13 for shaping the waveform of the signal output from the switching gate circuit 13 and outputting a dynamic scanning signal.

That is, the scanning circuit 14 receives the signal of any frequency output from the switching gate circuit 13 with the period T shown in FIG.
The pulse is shaped so that the duty t/T of the pulse width t and the pulse width t are the same. In other words, the pulse period and pulse width are adjusted to be proportional. Display bodies 101, 102, . . . are provided on the output side of the scanning circuit 14.
... A driver circuit 15 for driving and controlling 10n is connected, and a digit designation signal is output.

Furthermore, display bodies 101, 102, ......10
Connected to n is a decoder 16 that decodes the data signal of the corresponding digit and supplies it in the form of a specific character signal.
Next, the operation of the display device shown in FIG. 2 will be explained. When the signal generator 11 generates a pulse signal of a predetermined frequency, this pulse signal is divided into two branches, one of which is divided into two by the frequency divider 12.
The frequency is divided into N and supplied to the switching gate circuit 13, and the other is directly supplied to the switching gate circuit 13 as is. Incidentally, the switching gate circuit 13 is supplied with an emission color control signal from the outside, and the frequency divider 1 is controlled according to this control signal.
2 or the signal generator 11 is selectively taken out and supplied to the scanning circuit 14.

In this scanning circuit 14, the signal from the switching gate circuit 13 is waveform-shaped so that the duty ratio t/T is always constant, and dynamically scans the signal to output a scanning signal.

The drive circuit 15 is sequentially and dynamically driven in a predetermined order by this scanning signal. And drive circuit 1
Display bodies 10, 102, . . . corresponding to each digit of 5
...is driven with the selected pulse width, so
The infrared light emitting section 10a constituting the display bodies 101, 102, . . . emits infrared light with a pulse width determined by the emission color control signal. The wavelength converter 10b that receives this infrared light emits a specific color depending on the pulse width of the infrared light. At this time, since the data signal corresponding to each digit is decoded by the decoder 16 and supplied to the display bodies 101, 102, . . . provided for each digit, the display body 101, 102, ... ,10,・・・・・・・・・
, the data signal will emit light in the selected color. Note that the designation of the corresponding digit is performed by a scanning signal from the scanning circuit 14, as shown in FIG. As an example, FIG. 4 shows a signal from the frequency divider 12 and a signal from the signal generator 11 which are waveform-shaped by the scanning circuit 14, and each of these signals has a period Tl, T2 and a pulse width Tl, t2. Duty is equal.

Tlt2, that is, the relationship -=- holds true.

FIG. 4 shows an example in which the interperiod of the TlT2 pulse is increased five times; in this case, the pulse width T2 is five times the pulse width T.

In other words, the waveform is shaped by the scanning circuit 14 so that the pulse period and pulse width are in a proportional relationship. Although the segment method was described in the above embodiment, the dot matrix method is also applicable to the display bodies 101, 1.
02, . . . can be configured. Also display body 1
For example, the configuration of 01, 102, ......
As shown in the figure, an infrared light emitting section 10a and a wavelength converting section 10b
A panel 10c with a transparent window that matches the arrangement may be provided on the segments. Alternatively, the wavelength converter 10b (at the position of the transparent window) may be placed on the panel 10c side, and the infrared light emitting section 10a may be arranged in segments below. Furthermore, without varying the number of circular waves generated from the signal generator 11 according to the present invention, for example, as shown in FIG.
may be provided, and the pulse width whose waveform has been shaped by the scanning circuit 14 may be variably output.

Furthermore, it goes without saying that the signal generating circuit 11 does not need to be a pulse signal. In addition, each display body 101, 102...
Although the dynamic lighting method of sequentially scanning 10n has been described, each display body 101, 102...
・・・・・・10. Even in a static lighting method in which a decoder is provided for each of the display bodies 101, 102, .
The same effect can be obtained by supplying the drive signal simultaneously in the form of a pulse and adjusting the pulse width, but if a display pattern is formed using a large number of display bodies, it is necessary to provide a large number of decoders. It also has the disadvantage of requiring a more complex circuit configuration than the dynamic lighting method. It goes without saying that the present invention can be modified in various ways without departing from the scope of the invention. As described in detail above, the present invention uses an infrared light emitting section and a wavelength converter that emits different colors depending on the pulse width of the infrared light to construct a segment type or dot matrix type display, and each digit is Since the multiple displays to which data signals are supplied are driven by signals with different pulse widths and displayed in different colors, it is possible to quickly display state changes in different colors. Since the display can be displayed in different colors directly by changing the color, it does not cause erroneous judgments and contributes to the reliability of the device.

[Brief explanation of the drawing]

Figure 1 shows a light emitting element consisting of an infrared light emitting part and a wavelength converter.
2 is a block diagram showing an embodiment of the device of the present invention constructed using the display body as shown in FIG. 1, and FIG. 3 is a diagram showing the scanning circuit shown in FIG. 2. FIG. 4 is a diagram for explaining the correlation between two signals with different pulse widths, and FIGS. 5 and 6 are for explaining other embodiments. FIG. 5 is a block diagram of a display body to which a transparent window pattern is added, and FIG. 6 is a diagram in which pulse width switching is controlled on the output side of a scanning circuit. 10a...Infrared light emitting part, 10b...Wavelength converter, 10c...Pattern with transparent window, 10
,,102,10.

Claims (1)

[Claims] 1. Signal generating means for generating signals with different pulse widths;
a signal selection means for selectively outputting the signal generated by the signal generation means based on an external emission color control signal; and a signal selection means for selectively outputting a signal generated by the signal generation means based on an external emission color control signal; A drive circuit that outputs a drive signal with a different pulse width, a plurality of display bodies that are connected to the output side of this drive circuit and emit different colors in response to drive signals with different pulse widths, and a display on these display bodies. 1. A display device comprising: means for supplying a data signal, and the data signal is displayed on a plurality of display bodies in different colors. 2. The display body includes an infrared light emitting section that generates infrared light in response to drive signals having different pulse widths, and a wavelength conversion body that emits different colors by changing the pulse width generated from the infrared light emitting section. A display device according to claim 1, which is a display device according to claim 1.