KR940006539B1 - Head-up display device for a vehicle - Google Patents

Abstract

initializing of the micro-processor in switching on the second step starting switch and flickering all segments of the head-up display for a period of time and calculating the driving speed of a car; controlling differently the brightness of the segment as if the signal of the tail light is inputted by determining the condition of signal input of a tail light in case of turn-ON of main switch and displaying the present driving speed of the automobile; flickering the display of the directions of right and left in a regular cycle corresponding to the condition of inputted signal of the right/left rotating direction switch; and flickering the displays of fuel and temperature corresponding to the detecting signals as the shortage of fuel or an overheating engine by determining successively if the signals of engine-temperature or from the fuel detector is inputted.

Description

Vehicle Head-Up Display Control Method

1 is a block diagram of a head-up display control apparatus applied to the method of the present invention.

2 is an embodiment of a VFD driving power supply unit of the apparatus applied to the method of the present invention.

3 is an embodiment of a power supply unit of the apparatus to be applied to the method of the present invention.

4 is a peripheral circuit diagram of a microprocessor applied to the method of the present invention.

5 is an exemplary embodiment of a temperature detector applied to the method of the present invention.

6 is a flowchart for explaining the operation of the method of the present invention.

* Explanation of symbols for the main parts of the drawings

1: power supply unit 2: VFD: driving power supply unit

3: microprocessor 4: head-up display

5: temperature detector 6: speed detector

7: Fuel detection unit 8,9: Left and right turn direction switch unit

10: headlight switch unit 11: main switch unit

12 filter unit 13 reset circuit

14,16 input conversion circuit 15 oscillation circuit

20: segment 21, 22: left and right turn indicator

23: headlight indicator 24: fuel indicator

25: temperature indicator Tl: transformer

IGN2: 2-stage start switch D1-D3: Diode

C1-C6: Capacitors I1, I2: Inverter

R1-R6: Resistance VR1, VR2: Variable element

ZDl: Constant voltage diode REG: Regulator data.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a head-up display for a vehicle. In particular, a one-chip microprocessor incorporates various input information discrimination and processing programs of a vehicle to process display driving corresponding to detection information in a series of program processes. The present invention relates to a vehicle head-up display control method.

The vehicle head-up display displays information such as speed, oil level, and flashing lights in the lower part of the front of the driver's seat to prevent the front field from narrowing when the time is observed by the dashboard to recognize the current vehicle information while driving. .

In general, various vehicles have speedometers, fuel, engine temperature, left and right turn indicators, and upper and lower headlights flashing on the front panel of the driver's seat. The drive circuit for displaying information is provided with circuits individually matched to the respective functions from the detection means until the display element is turned on, and the signal transmission form of the drive circuits independently assigned to each function is mainly by analog signal method. Not only does the overall circuit configuration be complicated by the display, but it also requires a lot of expenses, and in particular, the speed state of the driving unit is displayed in the angle of the analog system, so that the speed state of the small unit (day unit) cannot be known at all. Of course, when the speedometer lamp is broken during night driving, There were many problems, including the difficult to identify with that.

Therefore, in view of the above-described problems of the prior art, the present invention incorporates various state input information panels and processing programs of a vehicle into a one-chip microprocessor so that the display body driving corresponding to the detection information can be controlled by executing a series of programs. Therefore, the purpose of the present invention is to provide a vehicle head-up display control method to simplify the circuit configuration and to digitalize the speed state while driving, thereby eliminating visual obstacles caused by the checking of the driving speed, thereby greatly contributing to the safe operation. .

In order to achieve the above object, the present invention initializes the microprocessor (3) and flashes all segments of the head-up indicator (4) for a predetermined time when the two-stage start switch (IGN2) is turned on, and calculates the running vehicle speed of the vehicle. (Ll) and the second switch for determining the tail light signal input state when the main switch unit 11 is turned on to control the brightness of the segment 20 differently depending on whether the tail light signal is input and then display the current vehicle speed. A third process (L3) for flashing the corresponding left and right direction indicators (21) 22 at regular intervals according to the process (L2) and the input signal state of the left and right rotation direction switch sections (8) (9); A fourth process (L4) is performed to sequentially determine the presence or absence of an input signal from the temperature and fuel detection unit (5) (7) to flash the fuel and temperature indicators (24) (25) corresponding to the fuel shortage and engine overheat detection signals. will be.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram of a head-up display control device applied to the method of the present invention, wherein the head-up through the microprocessor 3 and the VFD driving power supply unit 2 through the power supply unit 1 when the two-stage start switch IGN2 is turned on. Each driving power is applied to the display unit 4, the temperature detector 5 detecting the temperature of the engine unit, the speed detector 6 detecting the speed of the vehicle, and the fuel detector detecting the fuel storage state of the fuel reservoir. (7), left or right turn switch section (8) (9), filter section (12) for filtering the output signal of the up or down headlight switch section (10) and main switch section (7), and its output stage A microprocessor 3 connected to the segment output terminal of the microprocessor 3 and a microprocessor 3 for processing the input detection and vehicle speed calculation of the filtered detection signal of each function through a predetermined program process, According to the control signal A head-up display section 4 composed of a traveling speed display segment 20, a left and right rotation direction indicators 21 and 22, a headlight indicator 23, and a fuel and temperature indicator 24 and 25 so as to drive correspondingly. It was done.

2 is a specific embodiment of the above-described VFD driving power supply unit 2, a transformer Tl driven by a battery power source omitted according to the progressive state of the two-stage start switch IGN2, and its secondary winding Nl. And the anode and grid voltages of the head-up display section 4 are applied through the reverse diodes Dl (D2) and the capacitors C1 (C2) of the intermediate tap terminal N2, and the secondary auxiliary winding N3 thereof. The voltage induced at is configured to be applied as the filament driving voltage.

3 is a detailed embodiment of the power supply unit 1, wherein the battery power supply VBB (not shown) is applied to the input terminal of the regulator REG via the reverse current prevention diode D3 and the resistor Rl. The regulator REG is configured to supply a constant voltage driving voltage to the power supply terminal VCC of each circuit by dropping the battery power supply VBB to a constant voltage.

Here, reference numeral ZD1 is a constant voltage diode, and C3 is a grounding capacitor as a smoothing capacitor.

4 shows an input conversion circuit of the speed detector 6 and a peripheral circuit of the microprocessor 3, and the main functions include a reset circuit 13 coupled with a resistor R2 and a capacitor C4. An input conversion circuit 14 consisting of voltage divider resistors R3 and R4, a capacitor C5 and an inverter I1 for interrupting each driving speed detected by the speed detector 6, and an oscillation circuit for driving at a constant period ( 15 are each connected to a microprocessor 3.

5 is a setting unit for setting the reference temperature of the temperature detected from the temperature detector 5 as the variable elements VR1 and VR2, the pull-up resistor R5, the filters R6 and R6, and the inverter I2. The output of the configured input conversion circuit 16 is connected to be applied to the microprocessor 3.

In the present invention performed by the head-up display chair device configured as described above, the microprocessor 3 performs initialization to clear the previous data while turning on the two-stage start switch IGN2 as shown in FIG. The entire indicator and segment 20 of the head-up display 4 are turned on through the VFD drive power supply 2 for the next set time.

When the main switch unit 11 is turned on, whether the tail light signal is input or not is determined and the luminance of the segment 20 is set to different brightness to display the current vehicle speed.

After the main switch unit 11 is turned off, the left turn switch unit 8, the right turn switch unit 9, the headlight switch unit 10, the engine temperature detector 5 and the fuel detector 6 are moved to the next stage. In order to determine whether the input signal from the ON signal and the detection signal from is sequentially determined. First, when the left turn signal is input from the left turn direction switch part 8, the left turn indicator 2l of the head-up display part 4 is fixed. Flashes at intervals (approximately 0.5 seconds) and then determines whether the right turn signal is input.

As a result of this determination, when the right turn signal is input from the right turn direction switch section 9, the right turn indicator 22 of the head-up display section 4 flashes within the same time in the same manner as the left turn display operation.

In addition, the microprocessor 3 determines the input of the headlight on signal from the headlight switch unit 10 and turns on the headlight indicator 23 of the head-up display unit 4 when the headlight on signal is input. When the lamp is kept on, the headlight indicator 23 is continuously turned on and the lamp remains on even when the main switch unit 11 is turned off.

On the other hand, as shown in FIG. 5, the temperature detection unit 5 installed near the engine detects the temperature of the engine from time to time, and when the temperature exceeds the reference temperature set in the plurality of variable elements VR1 and VR2, the inverted temperature through the inverter I2. When the detection signal is applied to the microprocessor 3, the microprocessor 3 turns on the engine temperature warning indicator 25 of the head-up display 4 to inform the driver that the engine is overheated.

In addition, even when the fuel is insufficient, the microprocessor 3 lights up the fuel indicator 24 of the head-up display 4 by the detection signal of the fuel detector 7 as the driving of the temperature warning indicator 25 described above. It tells you that the fuel is low.

After the fuel state discrimination process, the main switch unit 11 returns to the on / off discrimination process to sequentially process the left and right turn signals, the headlight signal, the temperature detection signal, and the fuel shortage detection signal discrimination process until the vehicle stops completely. Will be repeated.

As described above, according to the present invention, the control is performed by a series of programs on a head-up indicator displaying various state information of the vehicle, thereby simplifying the circuit configuration and reducing the required cost due to the reduction of parts. In addition, it is possible to remove the visual obstacles of the driver as well as to contribute to the safe operation by allowing to display the speed state while driving in a numerical state.

Claims (1)

First step of initializing the microprocessor 3 and flashing all the segments of the head-up indicator 4 for a predetermined time when the second stage start switch IGN2 is turned on, and calculating the traveling vehicle speed of the vehicle L1 and the main switch. A second process (L2) for displaying the current vehicle speed after controlling the brightness brightness of the segment 20 differently according to the presence or absence of the tail light signal input by discriminating the tail light signal input state at the time of turning on, and the left and right turn direction switches Third process (L3) of blinking the corresponding left and right indicators 21 and 22 at regular intervals according to the input signal state of section (8) (9), engine temperature and fuel detection unit (5) (7) And a fourth step (L4) of sequentially determining whether an input signal is present or not, and flashing the fuel and temperature indicators 24 and 25 corresponding to the yen fuel shortage and engine overheat detection signal. .