KR930005849B1 - Driving condition displaying device for vehicle - Google Patents

Abstract

The apparatus displays the characters and figures, neccessary for safe automobile drive, on the rear part of the automobile so as to make the rear automobile driver recognize the drive conditions of the front automobile. The displayor comprises a micro-controller (1) for discriminating the drive conditions based on the input switch status, and controlling the overall apparatus related with the displaying characters; the switch (2) sensing the drive conditions resulted from driver's selection and brake states; an address latch (4) latching the address of a data ROM (6); an address decoder supplying a chip-enable signal of an output drive controller (7); a data buffer (8); data latch clock decoders (9,10); a data latch (11); a displaying driver (12); a character displayor (13); a driving displayor (14); a line decoder (15).

Description

Car driving status display

1 is a layout diagram showing a display and recognition relationship between a vehicle and a rear vehicle to which the present invention is applied.

2 is a block diagram of a vehicle driving state display device of the present invention.

3 is a detailed circuit diagram of a microcontroller, an operation switch, and an interface thereof in the present invention.

4 is a detailed circuit diagram of a microcontroller, a display data ROM, and an output drive controller in the present invention.

FIG. 5 is a detailed circuit diagram of each circuit section related to driving control of the character display section and the travel display section in the present invention. FIG.

6A to F are signal timing diagrams for explaining the operation switch search relationship according to the present invention;

7a to e are signal differential diagrams for explaining the drive control relationship of the travel display unit according to the present invention;

8A to j are signal timing diagrams for explaining a display state when a vehicle is stopped according to the present invention.

* Explanation of symbols for main parts of the drawings

1: microcontroller 2: switch

3: switch interface 4: address latch

5 Address Decoder 6 Display Data ROM

7: output drive control unit 8: data buffer

9,10: data latch clock decoder 11: data latch unit

12: display drive unit 13: character display unit

14: driving display unit 15: line decoder

16 line driving unit 17 driving interface

18: driving drive unit 19: display panel

The present invention relates to a vehicle driving state display apparatus, in particular, so that a phrase or a figure necessary for safe driving is displayed at the rear of the vehicle so that the driver of another vehicle located in the rear can visually recognize the driving state of the front vehicle.

In a conventional vehicle, traffic is aggravated because only the brake light (red) and the turn indicator (yellow) indicate stop or right and left turn directions to recognize the driver of the vehicle behind. In light of the reality, the utility tends to be relatively deteriorated. In particular, if the vehicle is stopped on the road due to a breakdown during operation, there is no means for recognizing the driver of other cars passing through the road. To this end, a towel or a piece of cloth board is placed on the rear license plate, or a driver of a faulty vehicle directly induces another vehicle on the road.

Therefore, there is a high possibility that second, third, and subsequent safety accidents due to the faulty vehicle are generated, and the inconvenience of being severed for the fault indication is increased, and the risk of an accident is further increased at night.

In addition, if there is an emergency that can occur in a car, such as a burglary in a taxi or a pickpocket in the case of a bus, it is necessary to promptly seek rescue and help from the surrounding citizens or police. Since there is no appropriate means, the safety of drivers and citizens in the car is threatened, and there is a high possibility that a human accident may occur.

The present invention has a means for displaying a predetermined character in conjunction with the brake in order to solve such a conventional problem, and according to the switch operation by the user's selection, emergency warning, emergency occurrence, troubleshooting, whether to change the left and right direction In addition, it is equipped with means to display appropriate phrases related to the rescue request to inform the driver of other vehicles visually and accurately, and to display the contents in the event of a breakdown to facilitate the operation of the vehicle and to ensure the safety of subsequent traffic. The purpose of the present invention is to provide a vehicle driving status display device to induce driving and to prevent the occurrence of safety accidents due to broken vehicles and to protect people and property by informing the surroundings quickly in the event of an emergency. When explaining the configuration of the present invention by the accompanying drawings as Well below.

As shown in FIG. 2, the vehicle driving state display apparatus of the present invention determines a driving state of a vehicle based on a switch input state and controls the entire apparatus related to a character to be displayed, and whether a brake is operated and a user. A switch unit 2 for detecting and outputting a driving state display intention by selecting a switch, a switch interface 3 for supplying an output signal of the switch unit 2 to the microcontroller 1, and the switch unit 2 An address latch unit 6 which latches an address of the display data ROM 6 output from the microcontroller 1 and supplies it to the display data ROM 6 so as to display a character corresponding to the operation of An address decoder 5 which decodes the most significant bit of the address supplied from the address latch section 4 and supplies the chip enable signal CE of the display data ROM 6 or the output drive control section 7; Display data ROM 6 in which data is stored for each character to be displayed, and data buffer 8 and data latch clock decoders 9 and 10 so that the corresponding characters are displayed according to the character data supplied by the microcontroller 1. Output drive control unit 7 for supplying control data related to drive control of < RTI ID = 0.0 >), < / RTI > a data buffer 8 for buffering control data of the output drive control unit 7 and supplying it to data latch unit 11, and the output. Data latch clock decoders 9 and 10 for decoding the control data of the drive control unit 7 and supplying the latch enable signal LE of the data latch unit 11, and a character display unit supplied from the data buffer 8; A data latch unit 11 for temporarily storing and outputting one line of data (13) and a light emitting diode of the character display unit 13 in a flashing manner in accordance with the one line data supplied from the data latch unit 11; Display driver 12 and light emitting diode Character display unit 13, which is composed of a matrix and flashes on a line-by-line basis by the display driver 12 and line driver 16 to display characters or figures, and is turned on in normal driving and consumes battery power. The driving display unit 14, whose luminance is reduced in accordance with the following, a line decoder 15 for decoding data for selecting a line to be driven in the character display unit 13 by the microcontroller 1, and the character display unit ( A line driver 16 for sequentially driving the horizontal line of the display 13 to blink the light emitting diode at a position corresponding to the longitudinal axis output line of the display driver 12, and a travel display unit 14 output from the microcontroller 1. A driving interface 17 for supplying a drive control signal of the control unit to the driving driver 18 and a driving driver 18 for controlling the blinking of the driving indicator 14 according to the output of the driving interface 17. As shown in FIG. 1, the letter display unit 13 and the travel display unit 14 are formed of a single display panel 19 and installed at the rear of the vehicle.

Meanwhile, in the embodiment of the present invention, the switch unit 2 is a brake switch S1 which is turned on every time the user presses the brake pedal as shown in FIG. 3, an emergency warning switch S2 for selecting an emergency warning phrase, and a test mode. Test switch (S3) for setting, switch (S4) during troubleshooting for selecting the word during troubleshooting, left and right switch (S5) for selecting the direction switch for left and right floors, and rescue request for selecting the phrase related to the rescue request Resistor R1 to R6 and capacitors C1 to C6 constituting a switch S6 and a filter for noise removal of each switch are configured.

In addition, as shown in FIG. 3, the switch interface 3 includes an optical coupler 301 to 306 for stable transmission of a signal input from the switch unit 2 and resistors R7 to R18 for driving two. do.

In addition, the data latch unit 11 includes a plurality of data latches 1101 to 1126 as shown in FIG. 5, and the display driver 12 includes a plurality of driver ICs 1201 to 1226. .

In addition, the driving display unit 14 is configured to include light emitting diodes one line up and down, as shown in FIG.

In addition, the line driver 16 includes a driver IC 1601 and driving transistors Q1 to Q15 for each of the lines L1 to L15 as shown in FIG. 5.

In addition, as shown in FIG. 5, the switch interface 17 includes a switching transistor Q16, an optical coupler 1701, and a cupping resistor R19, and the driving driving unit 18 supplies power to the driving display unit 14. As shown in FIG. It consists of a drive transistor Q17 which supplies.

As shown in FIGS. 2 and 5, the high-frequency signal is output from the output terminal PA4 of the microcontroller 1 when the first power is turned on (when the vehicle is started). (See also FIG. 7B: initial reset preceded) (a) Transistor Q16 of travel interface 17 is turned on.

Therefore, since the optical coupler 1701 is turned on and a high signal is supplied to the input terminal of the travel driving unit 18 (see also 7c), the output signal becomes low as the transistor Q17 is turned on (see also 7d).

When the transistor Q17 is turned on, the driving display is started by turning on the light emitting diode (blue) constituting the driving display unit 14, and the driving display 14 is turned on only when there is no switch input (see also 7e). . In addition, the brightness of the driving display unit 14 serves as a power monitoring function depending on the amount of battery consumption of the vehicle used as a power source, and the same effect is obtained on the brightness of the character display unit 13.

On the other hand, when the operation performed in the operation of the switch unit 2 will be described, as shown in FIGS. 1 and 2, the microcontroller 1 searches for whether or not the switch unit 2 is operated through the switch interface 3. The corresponding address of the display data ROM 6 in which the display data related to the appropriate phrase and figure (depending on the map MAP of the character display unit 13) is written to the operated switch.

That is, as shown in FIG. 3, for example, when the brake switch S1 is turned on by pressing the brake pedal, the optical coupler 301 is turned on so that the input terminal PB0 of the microcontroller 1 becomes low (see also FIG. 6A). The microcontroller 1 recognizes that the brake switch S1 has been operated, and outputs the address of the display data ROM 6 in which the phrase (including the figure, the same below) corresponding to the operation of the brake switch S1 is recorded.

By the same operation as above, the active low signal as shown in FIGS. 6b to f is also supplied to the input terminals PB1 to PB5 of the microcontroller 1 with respect to the emergency warning switch S2 to the rescue request switch S6. It is determined whether it has been operated.

Then, the microcontroller 1 outputs a predetermined address through the address / data output terminals AD0 to AD7 and the address output terminals A8 to A15 as in FIGS. 2 and 3, and the lower 8 bits of the address are address latches. It is latched in the section 4 to designate a lower address of the display data room 6 and the remaining 8 bits designate an upper address of the display data ROM 6.

The address latch in this case depends on the address latch enable signal ALE, and it is determined whether or not the data output to the address / data output terminals AD0 to AD7 is address or data.

In this case, the most significant bit address A15 is input to the address decoder 5 to be decoded, and the decoded result activates the chip enable signal CE of the display data room 6 or the output drive control unit 7. The data read and write by the microcontroller 1 are controlled.

That is, as in the above example, when the brake switch S1 is activated (see also FIG. 8a), the address latch enable signal ALE is activated (see also FIG. 8b), and the lower 8-bit address is output from the microcontroller 1. Data is then output (see also 8c) and the upper 8-bit address is input to the display data room 6 together with the lower 8-bit address latched in the address latching section 4 (see also 8c, d). The most significant bit A15 is decoded by the address decoder 5 to chip enable the display data room 6 (see also FIG. 8E), so that the character display data is output from the display data room 6 so that the output drive control unit Recorded in (7).

At this time, the output drive control address and data of the output drive control unit 7 by the address latch enable signal of the microcontroller 1 are output (see also 8c and d), and the output drive control unit 7 is executed by the address decoder 5. Chip enable signal is activated (see FIG. 8g), and the display data is output to one output terminal PA0 to PA7 of the output drive control section 7 by the write signal WR (see also FIG. 8i). The clock decode data is output to the other output terminals PB0 to PB5 (see also FIG. 8j).

Thereafter, as shown in FIG. 5, the display data output from the output drive control unit 7 is buffered by the data buffer 8 and then latched to the data latch unit 11, and the latch clock decode data is stored in the data latch clock decoder ( Decoded by 9 and 10, the control of the timing at which the output data of the data buffer 8 is latched to the data latch section 11 is performed as a chip enable signal.

In this manner, the display data output from the data buffer 8 is sequentially latched in accordance with the chip enable signal control of the data latch clock decoders 9 and 10 from the data latch 1101 to the data latch 1126 in units of 8 bits. In this case, the character data for the first horizontal line L1 of the character display unit 13 is closed.

When the output of the latch section 11 is input to the first line L1 of the character display section 13 through the driver ICs 1201 to 1226, the one-line driving signal by the microcontroller 1 at this timing is the line decoder ( 15 and the line driver 16 are supplied to the first line L1 of the character display unit 13 to turn on and off the light emitting diodes of the first line L1.

That is, as shown in FIGS. 2 and 5, the output line PA0, PA1, PA2, PA3 of the microcontroller 1 corresponds to the first line of the 15 vertical lines L1 to L15 of the character display unit 13. After the line data is output and the line data is decoded by the line decoder 15, the line data is supplied to the transistor driving circuit 1602 through the driver IC 1601 to turn on only the transistor Q1 corresponding to the first line.

Therefore, as power is supplied only to the first line L1 of the character display unit 13, the on / off of the light emitting diodes intersected with the outputs of the driver ICs 1201 to 1226 is controlled.

In the above-described operation, one completed character display screen is formed by repeating the fifteenth line L15 after the second line L2.

That is, the power consumption is minimized by sequentially driving 15 cycles of the flashing and scanning frequency which are not visually recognizable without simultaneously lighting 15 lines of the character display unit 13.

At this time, the phrase displayed by the character display unit 13 is a phrase about traffic order campaign, safe operation and may be accompanied by a figure in order to enhance the visual effect, and is recorded in advance in the display data room (6).

According to an embodiment of the present invention, the phrase displayed when the user presses the brake pedal is stored in the display data room 6 as 60. Examples of the phrase "safe driving 365 days!", "Let's obey traffic regulations", " Keep a safe distance "and" Let's protect children. "

On the other hand, such a phrase changes the data lead address of the display data room 6 to the address where the new phrase is stored whenever the microcontroller 1 detects the operation of the brake switch S1. By outputting, the new text is displayed on the character display unit 13, and the new text is displayed even when the time for depressing the brake pedal passes a predetermined time (for example, 20 seconds).

In this manner, the same operation as in the case of the brake switch S1 operation is performed even when the other switches S2 to S6 are operated, and only the displayed text is changed to be appropriate for the operated switch.

For example, if the driver operates the switch (S4) during troubleshooting, the phrase "In case of malfunction repair!" Is displayed. If the rescue request switch (S6) is operated, "Emergency emergency!" Or "☎! Rescue Request!"

As described above, according to the present invention, various phrases are displayed while the vehicle is in operation, and thus, the publicity effect on traffic safety can be achieved, and the battery life can be visually recognized through a significant reduction in illuminance of the display panel 19. Considering the fact that the search function is equipped with the fact that it does not check the brake lights or direction indicators during operation, it can be used as an auxiliary brake in case of breakdown of the brake lights. There is.

Claims (5)

The micro controller 1 determines the driving state of the vehicle based on the switch input state and controls the entire device related to the character to be displayed, and a switch unit for sensing and outputting the driving state display intention by the user's selection and whether the brake is operated ( 2), the switch interface 3 for supplying the output signal of the switch unit 2 to the microcontroller 1, and the microcontroller 1 for displaying characters corresponding to the operation of the switch unit 2; Decodes the address of the display data room 6 output from the address latch unit 4 for supplying the display data room 6 and the most significant bit of the address supplied from the address latch unit 4 to decode the address. An address decoder 5 for supplying a chip enable signal CE of the display data room 6 or the output drive control unit 7, a display data room 6 in which data is stored for each character to be displayed, and An output drive controller 7 for supplying control data related to drive control of the data buffer 8 and the data latch clock decoders 9 and 10 so that the corresponding characters are displayed according to the character data supplied by the microcontroller 1; The data buffer 8 buffers the control data of the output drive control unit 7 and supplies it to the data latch unit 11, and decodes the control data of the output drive control unit 7 to decode the control data of the data latch unit 11. Data latch clock decoders 9 and 10 for supplying the latch enable signal LE, and a data latch unit for temporarily storing and outputting data for one line of the character display unit 13 supplied from the data buffer 8 ( 11), a display driver 12 for driving the light emitting diode of the character display unit 13 to blink according to the data for one line supplied from the data latch unit 11, and a display driver unit 12 including a light emitting diode matrix. And by the line driver 16 The character display unit 13 which blinks by one line to display a character or a figure, the driving display unit 14 which is turned on in normal driving and the luminance is reduced in accordance with the consumption state of the vehicle battery power, and the microcontroller The vertical axis of the display driver 12 is driven by the line decoder 15 which decodes data for selection of the line to be driven by the character display unit 13 and the horizontal axis line of the character display unit 13 by (1). Line driving unit 16 for driving the light emitting diode at a position corresponding to the output line flashing, and a driving interface for supplying the driving control signal of the driving display unit 14 output from the microcontroller 1 to the driving unit 18 ( 17) and a driving drive unit (18) which controls the driving display unit (14) to blink in accordance with the output of the driving interface (17). 2. The switch unit (2) according to claim 1, wherein the switch unit (2) is a brake switch (S1) which is turned on each time the brake pedal is pressed, an emergency warning switch (S2) for selecting an emergency warning phrase, and a test switch (S3) for setting a test mode. , The switch during the troubleshooting (S4) to select the phrase during repair, the left and right direction switch (S5) to select the left and right direction switching phrase, the rescue request switch (S6) to select the phrase related to the rescue request and the noise of each switch A vehicle driving state display device comprising a resistor (R1 to R6) and a capacitor (C1 to C6) forming a filter for removal. 2. The switch interface (3) according to claim 1, characterized in that the switch interface (3) comprises optical couplers (301 to 306) for stable transmission of signals input from the switch unit (2) and resistors (R7 to R18) for its movement. Car driving status display device. 2. The vehicle driving state display apparatus according to claim 1, wherein the character display unit (13) and the travel display unit (14) comprise one display panel (19). The vehicle driving state display apparatus according to claim 1 or 4, wherein the driving display unit (14) comprises light emitting diodes of one line on the upper and lower sides of the character display unit (13).