JPH0543536B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a display device for a vehicle that displays detection results of states of various parts of a vehicle.

(Prior art) Generally, in vehicles, for example,
As stated in the publication, the vehicle is equipped with a display device that detects the status of each part of the vehicle and displays the results in order to notify the occupants of various information such as fuel shortage, door ajar, lamp burnout, and washer fluid shortage. It will be done.
As shown in FIG. 5, this type of display device usually includes a plurality of sensors (or switches) A ₁ to An that detect the states of various parts of the vehicle, and these sensors A ₁ to
A display section B consisting of a plurality of indicator lamps (light emitting diodes in the illustrated example) B ₁ to Bn corresponding to An;
The control means D controls the power supply from the battery C to each of the indicator lamps B ₁ to Bn.
Then, the logic processing section D' in the control means D
Based on the signals from A ₁ to An, the indicator lamp B ₁ is activated via drive actuators (transistors in the illustrated example) D ₁ to Dn in the control means D and harnesses E ₁ to En connected to these, respectively.
~ By driving Bn to light up, the above sensor A ₁
The state of each part of the vehicle detected by ~An is displayed.

However, in the conventional vehicle display device as described above, one indicator light is used for one indicator lamp.
Since two harnesses and one drive actuator are each connected, the same number of harnesses and drive actuators as the number of lamps are required.
As a result, especially in recent vehicles where the number of indicator lamps of this kind is increasing, the harness as a whole becomes noticeably bulky and costs are high.

Furthermore, when maintenance and inspection are carried out at a dealer or the like using the display device as described above, conventionally, for example, a predetermined check signal is inputted to the control means D to blink a specific indicator lamp, and the blinking pattern is Therefore, the presence or absence of an abnormality in the relevant part of the vehicle has been diagnosed, but in this case, there is a problem in that considerable skill and attentiveness are required to read the details of the failure from the blinking pattern of the indicator lamp. Therefore, in the past, there has been a strong demand for a display device that can easily perform this type of fault diagnosis work and display the diagnosis results in an easy-to-read manner.

(Object of the Invention) The present invention addresses the above-mentioned actual situation regarding vehicle display devices, and displays failure diagnosis results in an easy-to-read format by using a plurality of indicator lamps that respectively display each state of the vehicle. The purpose is to provide a new vehicle display device that can be used in a vehicle, and also to greatly reduce the number of drive actuators such as transistors and harnesses that make up this display device. The purpose is to simplify the configuration.

(Structure of the Invention) That is, the vehicle display device according to the present invention includes a plurality of state detection means for detecting the state of each part of the vehicle, and a plurality of state detection means provided corresponding to the state detection means and arranged in a matrix. indicator lamp and
Lamp driving means provided corresponding to each row and each column constituting the matrix, and a row to which the indicator lamp belongs so as to drive each of the indicator lamps to turn on in accordance with the outputs of the respective state detection means. and actuating the lamp drive means of the column, and at the time of fault diagnosis, so that each of the indicator lamps lights up in a predetermined pattern determined in advance according to the fault condition,
The present invention is characterized by comprising a control means for operating each of the lamp drive means described above.

According to such a configuration, each indicator lamp arranged in a matrix is turned on by the operation of the lamp driving means corresponding to the row and column to which the indicator lamp belongs. The state of each part of the vehicle, such as the door ajar state, is displayed by the lighting or non-lighting of the indicator lamp on the display device, and when diagnosing a fault, the lighting and non-lighting of the indicator lamps arranged in a matrix are combined. The failure diagnosis results will be displayed using the following display pattern. Incidentally, as the indicator lamp, for example, a light emitting diode, a light bulb, etc. are used.

(Effects of the Invention) According to the above configuration, a plurality of indicator lamps are arranged in a matrix, and a lamp driving means is provided corresponding to each row and column constituting the matrix, so that each indicator lamp is arranged in a matrix. The indicator lamps are turned on by the operation of the lamp driving means corresponding to the row and column to which they belong, so the number of harnesses connected to these lamps is determined by the lamps. The total number of rows and columns of the matrix is sufficient, and the number of lamp driving means (for example, transistors) for lighting these lamps can be equal to the number of harnesses. This causes indicator lamp 1
Compared to conventional display devices that require one harness for each lamp, the number of harnesses and lamp driving means can be significantly reduced, which reduces costs and reduces the weight and simplification of the wiring system. will be realized.

Particularly, according to the present invention, since the plurality of indicator lamps described above are used to display diagnosis results during failure diagnosis, a display device for failure diagnosis is provided separately from the display device for displaying the status of each part of the vehicle. Combined with the significant reduction in the number of lamp drive means and harnesses, the overall configuration is significantly simplified compared to the previous case. The results of this fault diagnosis are displayed as a matrix of indicator lamps arranged in a pattern of lighting and non-lighting. Visibility is significantly improved compared to conventional display devices, and failure diagnosis work can be performed extremely easily.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

FIG. 1 shows the basic circuit configuration of a vehicle display device, and as shown in the figure, the display device 1 includes:
A sensor section 2 having a plurality of sensors (including switches) ₂₁ to ₂₉ , a control section 3 that outputs a predetermined signal based on the signal from the sensor section 2, and a control section 3 that receives the signal from the control section 3. It has a display section 4 consisting of first to ninth indicator lamps (light emitting diodes in this embodiment) 4 ₁₁ to 4 ₃₃ that are turned on.

Each sensor 2 ₁ to 2 ₉ in the sensor section 2 is
They are installed at predetermined positions in each part of the vehicle, and detect, for example, a fuel shortage state, a door ajar state, a burnout of various lamps, a lack of washer fluid, etc., and send predetermined signals _a1 to _a9 to the control section 3. It is now being sent out.

On the other hand, the control unit 3 controls each of the sensors 2 ₁ to 2 ₉
a logic processing section 5 made up of a central processing unit (CPU) into which signals _a1 to _a9 from the processing section 5 are input;
3PNP type transistors 6 ₁ to 6 ₃ and first to third
3NPN type transistors 7 ₁ to 7 ₃ . Among these, the first to third PNP type transistors 6 ₁ to 6 ₃ are
These lamps 4 ₁₁ are connected to the + side (anode side) of the indicator lamps 4 ₁₁ to 4 ₃₃ via the first to third scan signal harnesses 8 ₁ to 8 ₃ .
~4 It is designed to control the current supplied to ₃₃ . Further, the first to third NPN type transistors 7 ₁ to 7 ₃ are connected to the first to third selection signal harness 9
₁ to 9 ₃ through each indicator lamp 4 ₁₁ to 4 ₃₃
connected to one side (cathode side) of each lamp 4 ₁₁
~4 It is designed to control the current on the ground side of ₃₃ . In this embodiment, a fault diagnosis switch 10 is provided outside the control section 3 and is connected to the logic processing section 5, and when the switch 10 is turned on, the logic processing section performs a predetermined fault diagnosis process. is configured to do so. In addition, the control unit 3
In the circuit, there is a resistor 11 for transistor protection...
11 is provided, and the above-mentioned 1st to 1st
This is designed to prevent destruction of the 3PNP transistors 6 ₁ to 6 ₃ due to excessive current flowing through them.

In the display section 4, the indicator lamps 4 ₁₁ to 4 ₃₃ are arranged in a matrix as shown in the figure.
The above-mentioned scan signal harness 8 ₁ has a number on the + side of ₁₁ to 4 ₃₃ corresponding to the number of lines of the lamps 4 ₁₁ to 4 ₃₃ .
_-83 , respectively, and the - side thereof is connected to the selection signal harnesses ₉₁ to ₉₃ , respectively, whose numbers correspond to the number of columns of the lamps ₄₁₁ to ₄₃₃ . Therefore, for example, the indicator lamp ₄₁₂ arranged in the first row and second column has its + side connected to the first scan signal harness ₈₁ , and its - side connected to the second selection signal harness ₉₂ . It is connected. Then, from the control unit 3, each harness 8 ₁ to 8 ₃ and 9
_{Each of the indicator lamps 411 to 433} is configured to light up, but in that case,
The indicator lamp lights up when the scan signal is ON and the selection signal is OFF.

Next, the operation of the above embodiment will be explained.

First, in a normal case, each sensor 2 ₁ to 2 ₉ detects the state of each part of the vehicle, and depending on the result, the corresponding sensor (for example, the first sensor 2 ₁ that detects a fuel shortage state)
A predetermined signal (for example, a fuel shortage signal a ₁ ) is output from the control unit 3 to the logic processing unit 5 in the control unit 3. On the other hand, the logic processing unit 5 in the control unit 3 outputs the first to third PNP type transistors 6 ₁ to 6 ₃ . As shown in _the time chart of FIG _.
Scan signals (ON signals) b ₁ to _{b 3} in this order,
In other words, the lamps 4 ₁₁ to 4 ₃₃ are periodically scanned and sent out in the order of their rows. For example, when the signal a ₁ is input as described above, the first indicator lamp 4 ₁₁ for indicating fuel shortage is displayed. By making the first NPN transistor 7 ₁ conductive in synchronization with the sent out first scan signal b ₁ , the first selection signal (OFF signal) c ₁ is sent out to the first indicator lamp 4 ₁₁ . This causes the first indicator lamp 4 ₁₁
A current flows through the lamp 411 to light up the lamp ₄₁₁ , and as a result, information about the fuel shortage state is displayed on the display section. Furthermore, when the signals a 2 to a 9 from the second to ninth sensors _{2 2} to 2 ₉ are input to the logic processing section 5, _the respective indicator lamps 4 are
By lighting up ₁₂ to ₄₃₃ , each sensor ₂₂ to
The status of each part of the vehicle detected by ₂₉ will be displayed. In addition, in FIG. 2, the first, fifth, eighth, and ninth indicator lamps 4 ₁₁ , 4 are shown as an example.
₂₂ , ₄₃₂ , ₄₃₃ , the first to third scan signals _b1 to _b3 and the first to third selection signals _c1 to _c3
In that case, each signal b ₁
The frequency of ~b ₃ , c ₁ ~c ₃ (period T) is such that the lamp light does not flicker when seen with the naked eye (for example, 50~60Hz).
or higher).

On the other hand, during failure diagnosis, that is, failure diagnosis switch 1
When 0 is input, the control unit 3 in the display device 1 performs a fault diagnosis operation in accordance with the flowchart shown in FIG. 3, in addition to the normal state detection and display operation as described above. In other words, when diagnosing a fault,
First, in step _S1 , it is confirmed that the fault diagnosis switch 10 has been turned on, and then step _S2 is executed. performs fault diagnosis operations. Then, in step _S3 , the presence or absence of an operational abnormality is checked, and if there is an operational abnormality, it is further determined in step _S4 whether or not the abnormality is an operational abnormality with error code I. In that case, if the abnormality is an error code abnormality, the step
By executing _S5 , a predetermined lamp among the indicator lamps ₄₁₁ to ₄₃₃ , for example, the third,
The fifth and seventh lamps 4 ₁₃ , 4 ₂₂ , and 4 ₃₁ are turned on. As a result, as shown in FIG. 4, the failure of the error code is indicated by a predetermined lighting pattern of each indicator lamp arranged in a matrix. If the error code is not abnormal, steps _S6 to _S7 or _S8 are executed to display a pattern indicating the error code or an abnormal operation of the error code in the same manner as described above. Incidentally, FIG. 4 shows the lighting pattern of the error code (the first, fourth, and seventh indicator lamps 4 ₁₁ , 4 ₂₁ , and 4 ₃₁ are lit).

As described above, according to the present invention, the indicator lamps 4 ₁₁ to 4 ₃₃ that display the status and failure diagnosis results of each part of the vehicle are arranged in a matrix, and the harnesses are arranged in a number corresponding to the rows and columns of the matrix. All indicator lamps through 4 ₁₁ ~
4 ₃₃ is driven to turn on. This reduces the number of harnesses and the number of lamp drive actuators (transistors 6 ₁ to 6 ₃ , 7 ₁ to 7 ₃ ) will be significantly reduced. In addition, since the fault diagnosis results are displayed in the array pattern of the indicator lamps 4 ₁₁ to _{4 33} arranged in a matrix, lighting and non-lighting, the visibility is significantly improved and the fault diagnosis work is also extremely simplified. will be done.

In the above embodiment, the PNP type and the actuator for driving the indicator lamp are used.
Each NPN type transistor was used, but instead of these, P channel and N channel transistors were used.
FETs (field effect transistors), relays, etc. may also be used.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram of a vehicle display device showing one embodiment of the present invention, Fig. 2 is a time chart showing an example of each signal output timing output from the control means (control unit), and Fig. 3 4 is a flowchart showing the operation of the control means during failure diagnosis, and FIG. 4 is an example of pattern display by indicator lamps. Further, FIG. 5 is a circuit diagram schematically showing a known example of a display device for a vehicle. _DESCRIPTION OF SYMBOLS 1...Vehicle display device, _21-29 ...State detection means (sensor or switch), 3...Control means (control unit), _411-433 ...Indicator _lamp ,
6 ₁ to 6 ₃ , 7 ₁ to 7 ₃ ... Lamp driving means (transistor).

Claims (1)

[Claims] 1. A plurality of condition detection means for detecting the condition of each part of the vehicle, a plurality of indicator lamps arranged in a matrix and provided corresponding to each of these condition detection means, and a plurality of indicator lamps arranged in a matrix in each row and column constituting the matrix. activating the lamp driving means of the row and column to which the indicator lamp belongs, so as to drive each of the indicator lamps to turn on in accordance with the outputs of the correspondingly provided lamp driving means and each of the state detecting means; and a control means for operating each of the lamp driving means so that each of the indicator lamps lights up in a predetermined pattern determined in advance according to the failure state at the time of fault diagnosis. Vehicle display device.