JPH01269608A - Display controller for vehicle - Google Patents

Abstract

PURPOSE:To adjust the whole illumination balance by light-adjusting a variety of lamps having different illumination faculty by the pulse signals having the duty ratio corresponding to each illumination faculty and harmonizing the duty ratio of each pulse signal. CONSTITUTION:The pulse signals having a prescribed duty ratio are generated in one comparator 3 on the basis of the signal waves having a prescribed wave form by one oscillator 1. A number of indicator lamps 9-15 are light-adjusted by the pulse signals. The pulse signals having a prescribed duty ratio are generated by the other comparator 4 on the basis of the signal waves having a prescribed wave form by the other oscillator 2. A number of night illuminating lamps 6-8 are light-adjusted by the pulse signals. Each comparator 3, 4 is simultaneously controlled by a variable resistor 5. Therefore, the light adjustment of each lamp is synchronized by synchronization-controlling the duty ratio of the pulse signals outputted from each comparator 3, 4.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a display control system for a vehicle that applies a dimming signal to a display means having a plurality of light emitting elements having one luminous performance or different from each other, and more specifically, The present invention relates to dimming according to the light emitting performance of each light emitting element, and to synchronization control of the entire display means having a plurality of these light emitting elements.

[Prior Art and Invention Solution Section 8] The problem is that during the daytime, the interior of the vehicle is bright as a whole, so the various indicator lamps on the instrument panel need to be made even brighter to identify their on/off status. Although it is difficult to do so at night, since the whole room is dark at night, it is possible to identify whether the indicator lamps are on or off even at low illuminance.

For this reason, various indicator lamps can be dimmed,
It is common practice to change the illuminance of the indicator lamps in accordance with the brightness inside the vehicle interior.

Regarding the dimming of various lamps on the instrument panel, there is a technique as disclosed in Japanese Utility Model Application Publication No. 141547/1983. This thing is the indicator light of the air conditioner installed on the instrument panel, and its air conditioner I! 4! This is a technology that synchronizes and dims the night light lamps that are also placed on the instrument panel in order to illuminate the A21 etc. at night. It detects changes in lamp current and automatically changes and adjusts the it v voltage of the indicator lamp in accordance with the increase or decrease in current. That is, since the indicator lamp is dimmed in accordance with the dimming of the night illumination lamp, the lighting balance on the instrument panel is balanced as a whole.

However, with the above technology, the night lighting lamp that is dimmed and the indicator lamp that is dimmed in conjunction with it have different luminous performance, and in particular, the response when changing the light amount is different. There is a problem in that the amount of light changes when dimming, making the operator feel strange.

[Purpose of Development 1N+] This Development II was made in consideration of the above-mentioned ff view, and even if the light emitting performance of the various lamps on the instrument panel is different, the lighting balance of them as a whole is It is an object of the present invention to provide a display control device for a vehicle that can perform dimming control so as to be harmonized, and that changes in light during dimming are harmonized as a whole and do not give a sense of discomfort.

[Structure of the Invention] In order to achieve the above object, a vehicle display control device according to the present invention is a vehicle display control device that provides a dimming signal to a display means having a plurality of types of light emitting elements having different light emitting performances. oscillating means for outputting a plurality of types of signal waves having waveforms corresponding to the light emitting performance of each of the light emitting elements; and a reference signal having a designated constant value level and a plurality of types of signal transmitters from the oscillating means. From the comparison, a plurality of pulse signals with different duty ratios are generated, and each pulse signal is outputted to each light emitting element as a dimming signal, and the duty ratio of these pulse signals changes the level of the reference signal. an output means, all of which are changed in synchronization by;
This structure is similar to the instructing means for supplying a changeable constant value level signal to the output means as a reference signal.

With the above configuration, each of the light-emitting elements with different light-emitting performances is dimmed and controlled by a pulse signal with a duty ratio corresponding to its own light-emitting performance, and all of the duty ratios of these pulse signals are synchronized. Even if the light emitting performance of the various lamps (each light emitting element) on the instrument panel is different, it is possible to control the lighting so that the lighting balance is harmonized as a whole. Changes in the amount of light as a whole can be made to make the operator, who is y4 summed, feel uncomfortable.

[Embodiments of the Invention] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a block diagram showing the overall configuration of a preferred embodiment of a vehicle display control device according to the present invention.

In the same figure, each of 1 and 2 is an oscillator that oscillates a signal wave of a predetermined waveform and outputs 3.4, and each of 3.4 is an oscillator 1.2.
Comparators each output a pulse signal with a predetermined duty ratio based on the signal wave from the comparator 3.4.
a CTr resistance variable resistor as an indicating means for giving a reference signal v71I of a constant value level that can be changed to 7.8, each of 7.8 is a night illumination lamp constituted by a bulb light bulb, 9.10 and each of 11 to 15 is a light emitting diode. This is an indicator lamp composed of

This vehicle display control device uses various lamps having different light emitting performances, that is, night illumination lamps 6 to 8 and indicator lamps 9 to 15, respectively.

By giving a dimming signal according to the light emitting performance of each lamp and controlling it so that all the lamps have the same light emitting performance,'! ! !
J This is to harmonize the lighting balance of the entire display device.

In this vehicle display control device, the comparator 3 generates a pulse signal with a predetermined duty ratio based on a signal wave of a predetermined waveform from the oscillator 1, and the indicator lamps 9 to 15 are dimmed by the pulse signal. , the comparator 4 based on the signal wave of a predetermined waveform from the other oscillator 2.
A pulse signal having a predetermined duty ratio is generated, and the night illumination lamps 6 to 8 are dimmed by the pulse signal. By simultaneously controlling the comparators 3 and 4 using the variable resistor 5, the duty ratios of the pulse signals outputted from the comparators 3 and 4 are synchronously controlled to synchronize the dimming of each of the lamps, thereby achieving an overall illumination balance. It harmonizes the

This vehicle display control device is applied to a control panel of a vehicle air conditioner disposed at a predetermined portion of an instrument panel, and FIG. 2 is a front view of the control panel. That is, the indicator lamps 9 to 15 are each disposed at a predetermined position on the control panel to visually indicate each air conditioning mote of the vehicle air conditioner. Further, night illumination lamps 6 to 8 are respectively disposed at predetermined positions on the peripheral rear portion of the control panel, and illuminate the characters on the control panel at night.

31st? I! I is a circuit diagram showing in detail the main part configuration of FIG. 1; Further, FIG. 4 is a time chart schematically showing waveforms of output signals of each part in FIG. 3.

The signal wave S output from the oscillator 1 has a sawtooth waveform corresponding to the light emitting performance of the indicator lamps 9 to 15, and is sent to the comparator 3 from the oscillator 1. Further, the signal wave St outputted from the oscillator 2 has a substantially sawtooth waveform corresponding to the light emission performance of the night illumination lamps 6 to 8, and is sent from the oscillator 2 to the comparator 4.

Note that the signal wave S by one oscillator 1 is generated based on the signal S2 from the operational amplifier 201 constituting one oscillator 2 in the embodiment shown in FIG. That is, the signal wave S3 is obtained by controlling the charging of the capacitor lO1 constituting the oscillator l using the signal S3. However, it goes without saying that the present invention is not limited to this, and that the circuit configuration of the oscillator 1 can be changed as appropriate to independently oscillate and output the signal wave S3 without using the signal S2. Furthermore, the circuit configuration of the first oscillator 2 can also be changed as appropriate.

Both comparators 3.4 use the reference signal vTH sent from the variable resistor 5 as a reference for their comparison operation, and this reference signal V! A and the signal wave Si from the oscillator 1.2
, St, the pulse signal S4 with a predetermined duty ratio is determined from the comparison with St.
．． Ss is generated respectively.

These pulse signals S4. Ss is sent as a dimming signal from the comparators 3 and 4 to each of the indicator lamps 9 to 15 and the night illumination lamps 6 to 8, and by changing and setting the reference signal vTn by the variable resistor 5, all of them, that is, All duty ratios of the pulse signals 84O3S generated by the comparators 3 and 4 are changed arbitrarily in synchronization.

Now, FIG. 5 is an explanatory diagram of the signal level in which the signal wave S1 and the signal wave S3 are shown superimposed on each other as the reference signal VAN''t!.

As shown in FIG. 5, the signal wave Sl has a larger peak value than the signal wave S1, and the reference signal V? The waveform is set so that the rise to H is quick. Therefore, the pulse signal Ss based on the signal wave S1 is the signal wave S3.
It always rises earlier than the pulse signal S4 based on , and its duty ratio is also large. This is to compensate for the night illumination lamps 6 to 8, which have inferior luminous performance compared to the indicator lamps 9 to 15, and is to always make the rise of the pulse signal S% earlier than the pulse signal S4. In this way, especially poor response is corrected.

That is, the pulse signal S by the comparators 3 and 4
4. S4 is a signal wave S having a waveform corresponding to each light emitting performance of the night lighting lamps 6 to 8 and indicator lamps 9 to 15.
! , Sl, the duty ratios are also corrected to correspond to the light emitting performance of each lamp so that the light emitting performance of each lamp becomes the same.

Therefore, according to such a configuration, each of the various lamps having different light emitting performance, that is, the night lighting lamps 6 to 8 and the indicator lamps 9 to 15, receives the pulse signal S4, which has a duty ratio corresponding to its own light emitting performance. 3%, and the duty ratios of these pulse signals are all changed synchronously by the variable resistor 5, so the light emitting performance of the various lamps on the instrument panel is different. However, it is possible to perform dimming 1111 so that the illumination balance is harmonized as a whole, and the change in the amount of light during dimming can also be made so that it does not give a sense of discomfort to the operator who is harmonized as a whole.

In the above embodiment, the present invention is applied to a control panel of a vehicle air conditioner, but the present invention is not limited to this. The present invention can be similarly applied to various other display devices such as digital meters and meters.

[Effect of 9.S1] As explained below, according to the present invention, even if the light emitting performance of the various lamps (each light emitting element) on the instrument panel is different from each other, each of them can achieve its own performance. Dimming is controlled by a pulse signal with a duty ratio corresponding to the light emitting performance, and all of the duty ratios of these pulse signals are changed in synchronization, so the lighting balance is adjusted as a whole. With light control monkeys,
Changes in the amount of light during dimming can also be made so that the operator who is in harmony with the whole does not feel uncomfortable.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the overall configuration of a preferred embodiment of the vehicle display control device according to the present invention, and FIG. 2 shows a control panel of a vehicle air conditioner to which the vehicle display control device of FIG. 1 is applied. 3 is a circuit diagram showing in detail the configuration of the main parts of FIG. 1, FIG. This is an explanatory diagram of the signal waves S + and Ss shown in the figure, which are mutually equal signal levels. 1.2... Oscillator (oscillation means) 3.4-... Comparator (output means) 5... Variable resistance (indication means)

Claims (1)

[Claims] A display control device for a vehicle that provides a dimming signal to a display means having a plurality of types of light emitting elements with different light emitting performances,
An oscillating means for outputting a plurality of signal waves having waveforms corresponding to the light emitting performance of each of the light emitting elements, and a duty ratio determined by comparing each of the plurality of signal waves from the oscillating means with a reference signal of a designated constant value level. generates a plurality of different pulse signals, and outputs each of the pulse signals to each of the light emitting elements as a respective dimming signal, and the duty ratio of these pulse signals is changed by changing the level of the reference signal. an output means that changes in synchrony;
1. A display control device for a vehicle, comprising: instruction means for supplying a changeable constant value level signal to the output means as a reference signal.