JPS58158798A - Compound display for vehicle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a display device for a vehicle, and particularly includes a display surface exposed inside the cabin of a vehicle, and displays a plurality of physical quantities that change according to the operation of various operating devices mounted on the vehicle. The present invention relates to a composite display device for a vehicle suitable for displaying information on the display surface using an electro-optical conversion effect.

In general, when displaying the above-mentioned plurality of physical quantities using this type of composite display device, it goes without saying that the display contents need to be clearly and easily visible from the display surface, but also the interior space of the vehicle. Therefore, it is desirable to reduce the surface area of the display surface of the composite display device as much as possible.

The present invention has been made with attention to this point of view, and its purpose is to display the above-mentioned plurality of physical quantities at different times on a single display screen by an electro-optical conversion effect. An object of the present invention is to provide a composite display device for a vehicle.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.
The figure shows an example of a composite display device for a vehicle according to the present invention, and this composite display device includes a plurality of sensors 10.2 to 1.
0f1 display selection mechanism 20, an A-D converter 60 connected to each sensor 1Oa to 10f, and a microcomputer 40 connected to the display selection mechanism 20 and the A-D converter 60.
It is equipped with

The water temperature sensor 10a detects the temperature T of cooling water in the vehicle internal combustion engine cooling system (hereinafter referred to as water temperature T) and generates this as a first analog signal.
b detects the pressure P (hereinafter referred to as oil pressure P) of the lubricating oil in the vehicle internal combustion engine warming device and generates this as a second analog signal, and the oil amount sensor 10c is attached to the warming device. The level of warm oil in the reservoir tank is detected and generated as a third analog signal representing the amount of warm oil Qo (hereinafter referred to as oil amount QO).

The voltage sensor 10d detects the output voltage V(
The current sensor 10e detects the voltage (hereinafter referred to as voltage V) and generates it as a fourth analog signal, and the current sensor 10e detects the load current flow (hereinafter referred to as current flow) flowing from the DC power supply to various load circuits of the vehicle. The remaining amount sensor 10f detects the level of fuel present in the fuel tank for the vehicle and generates it as a fifth analog signal, and the remaining amount Qf of the fuel is detected.
is generated as a sixth analog signal representing . The A-D converter 60 sequentially converts the analog signals from each of the sensors 10a to 10f into first to sixth binary signals, and provides each of these binary signals to the microcomputer 40 in response to the request. . The display selection mechanism 20 is formed by connecting five self-returning normally open switches in parallel, and responds to the selective closing operation of each of these normally open switches to indicate water temperature T1 oil pressure P1 oil quantity Q.
The first, which is necessary for displaying O1 voltage V and electric current, respectively.
The second, . . . , fifth selection signals are alternatively generated.

The microcomputer 40 operates based on power supplied from the DC power supply, and its main components include a central processing unit (hereinafter referred to as CPU), an input/output device (hereinafter referred to as /.), and a read-only・Memory (hereinafter referred to as
ROM), random access memory (hereinafter referred to as RAM), and a clock circuit.

/. applies the first to sixth binary signals from the A-D converter 60 to the RAM, and also applies any of the first to fifth selection signals from the display selection mechanism 20 to the CPU.

The ROM is loaded with the CPU according to the flowchart shown in Figure 6.
A display control program necessary for execution is stored in advance.

The CPU repeatedly executes the above-mentioned display control program in response to a series of clock signals generated from the clock circuit in cooperation with a crystal oscillator, and during the repeated execution, performs various operations as described in the explanation of the operation below. A remaining amount display signal, a selected physical quantity display signal, and a selected physical quantity display signal necessary for performing calculations and applying them to the drive circuit 50 based on the relationship with each of these calculations.
An abnormality display signal and first to fifth identification signals are generated.

In this case, the remaining amount display signal corresponds to a signal that defines the remaining amount of fuel Qf, and the selected physical quantity signal corresponds to each of the remaining physical quantities other than the remaining amount of fuel Qf, that is, each selected physical quantity T.

Corresponds to a signal that specifies either P, Qo, V, ■,
The abnormality display signal is the total physical quantity Qf * T * P +QO
The first to fifth identification signals correspond to a signal defining an abnormality of either 9V or I, and the selected physical quantities T and P.

Q　O+　v+corresponds to a signal for identifying each.

The drive circuit 50 is connected between the microcomputer 40, the liquid crystal panel 60, and the lamp panel 70,
Remaining amount display signal from CPU (or selected physical quantity display signal)
generates a first drive signal (or second drive signal) corresponding to the value of the remaining amount display signal (or the value of the selected physical quantity display signal) in response to the error display signal from the CPU; A third drive signal is generated corresponding to the value of the signal.

Further, the drive circuit 50 generates first to fifth lighting signals in response to first to fifth identification signals from the CPU, respectively.

Both the liquid crystal panel 60 and the lamp panel 70 are installed on a second part of an instrument panel provided in the vehicle interior of the vehicle.
As shown in the figure, the liquid crystal panel 60 is constructed by arranging a plurality of bar-shaped liquid crystal segments in a line in the vertical direction. Further, each liquid crystal segment of the liquid crystal panel 60 is configured by vertically arranging both par-shaped liquid crystal segments capable of displaying blue and red.

Therefore, the liquid crystal panel 60 receives the first (
Alternatively, in response to the second drive signal, the remaining fuel amount Qf (or selected physical quantity T) is displayed by displaying the number of blue displayable liquid crystal segments defined by this drive signal.

P+ QOT V, ENG) is displayed in blue in the form of a bar graph. In addition, the liquid crystal panel 60 responds to the sixth drive signal from the drive circuit 50 and displays any of the total physical quantities Qf + TrP*Qo+P+by using a number of liquid crystal segments capable of displaying red color defined by the sixth drive signal. is displayed in red in the form of a bar graph. lamp panel 7
0 is five lamps 71 to 7 arranged in a row in the vertical direction.
5, and the surface of each of these lamps 71 to 750 displays "water temperature", "oil pressure", "oil amount", "voltage",
The word "current" is displayed in advance. However,
The lamp panel 70 lights the lamps 71 to 75 in response to the first to fifth lighting signals from the drive circuit 50, respectively.

In this embodiment configured as described above, when the vehicle is driven and the microcomputer 40 is activated, the CPU starts executing the display control program at step 100 according to the flowchart of FIG. In step 102, the contents of the microcomputer 40 are initialized, and in step 102, the first to sixth signals from the A-D converter 60 generated by cooperation with the respective sensors 10a to 10f are
The binary signal is stored in the RAM, and the display control program then proceeds to determination step 103. However, step 1
01, the remaining amount display time tu required to display the remaining fuel amount Qf is set to a predetermined value To (stored in advance in the ROM) in the first counter provided in the RAM. In addition, selected physical quantities T, P, Qo, V,
Selected physical quantity display time t required to display any of the
o is reset to zero, and the total physical quantity Qf eT+”e
It is assumed that the abnormality display time tm required to display an abnormality of either QO*V or I is reset to zero.

When the display control program proceeds to step 106 as described above, the CPU determines "YESJ" based on the reset result j c = 0 in step 101,
In the next step 104, it is determined as YESJ based on the reset result tm=0 in step 101, and in step 105, the remaining fuel amount Qf is calculated based on the sixth binary signal stored in step 102. Generated as a quantity display signal. Then, the drive circuit 50 responds to the remaining amount display signal from the CPU and generates a first drive signal corresponding to the value of this signal, and the liquid crystal panel 60 responds to the first drive signal from the drive circuit 50 and generates this first drive signal. The remaining amount of fuel Qf is displayed in blue in the form of a bar graph by the number of liquid crystal segments capable of displaying blue color defined by the first drive signal.

Thereby, the driver can visually confirm that the amount of fuel remaining in the fuel tank is sufficient.

When the display control program proceeds to step 106, the CPU
is obtained from the set result tN=To in step 101.
1" and updates this subtraction result as the remaining amount display time ti. In step 107, it is determined "NO" based on the updated result tu (≠0) in step 106, and at this stage, the display selection mechanism 20 has not been operated, in step 110 it is determined as NOJ and the display control GLODARAM is returned to step 102.After that, the remaining amount display signal is generated in step 105, the subtraction update is performed in step 106, and the display control is performed in step 107. [NO, 1] is repeated, and when the update result tu=0 is established in step 106, the CPU determines [YESJ] in step 107, and then in step 108.
, the abnormality display time tm is set to a predetermined value Tl (stored in advance in the ROM) in a second counter provided in the RAM.
and set.

When the display control program reaches determination step 104, the CPU determines that it is rNOJ based on the set result in step 108, and then the display control program determines whether any of the total physical quantities QfsT+P+Qo y P+ is abnormal. The process advances to step 111 in which it is determined whether or not. At present, the total physical quantity Qf +T*P+ Q,
o 5VsI75” assuming both are normal, CP
U determines “NO” in step 111, and steps 1
At step 12, the display time tg set in step 108 is reset to zero in the second counter, and the remaining amount display time tN is set to a predetermined value T in the first counter. and set
Thereafter, calculations after step 105 are performed in the same manner as in the case described above.

However, in this embodiment, as the determination criteria in step 111 described above, the high temperature value of the water temperature T (hereinafter referred to as the first determination value) indicating that there is a high probability of overheating of the internal combustion engine, and the high value of the water temperature T indicating that there is a high probability of overheating of the internal combustion engine; A low limit value of the oil pressure P (hereinafter referred to as the second discriminant value) and a low limit value of the oil quantity QO (hereinafter referred to as the third discriminant value) each representing a high probability, and a probability of a power supply failure of the DC power source. a low limit value of the voltage V (hereinafter referred to as the fourth discriminant value) indicating that the load circuit is high, and a high limit value of the electrician indicating that there is a high probability of abnormality in the load circuit (hereinafter referred to as the fifth discriminant value). , and the remaining amount Qf, which indicates that there is a high probability of fuel shortage in the fuel tank.
A lower limit value (hereinafter referred to as the sixth discriminant value) is adopted and stored in advance in the ROM. However, the first
The value of the binary signal is lower than the first discriminant value, the value of the second binary signal is higher than the second discriminant value, and the value of the third binary signal is lower than the sixth discriminant value.
V more than the discriminant value, the value of the fourth binary signal is higher than the fourth discriminant value, the value of the fifth binary signal is less than the fifth discriminant value, and the value of the sixth binary signal is the sixth discriminant value. When the number is greater than the discrimination value, the discrimination result in step 111 becomes "NO, l".

On the other hand, for example, because the value of the first binary signal is higher than the first discrimination value, the discrimination result in step 111 is I-YE.
If SJ occurs, the CPU generates a first identification signal in step 113, and in step 114 calculates the water temperature T based on the first binary signal and generates it as an abnormality display signal. Then, the drive circuit 50 generates a first lighting signal in response to the first identification signal from the CPU, and generates a third drive signal corresponding to the value of the signal in response to the abnormality display signal from the CPU. do. Next, the lamp panel 700 rung 71 is turned on in response to the first lighting signal from the drive circuit 50, and the liquid crystal panel 60 is turned on in response to the sixth drive signal from the drive circuit 50. The water temperature T is displayed in red in the form of a bar graph by a prescribed number of liquid crystal segments capable of displaying red. In other words, the red display by the liquid crystal panel 60 is the lamp 71.
This is done together with the water temperature identification display by lighting the engine, so the driver can easily visually recognize abnormalities in the temperature of the cooling water in the internal combustion engine cooling system, and can take the necessary measures to prevent the internal combustion engine from overheating. . In addition, in this case, the red display of the water temperature T is displayed on the same display surface of the liquid crystal panel 60 instead of the blue display of the remaining fuel amount Qf described above, so that the display space of this type of display device can be saved. Effective.

When the display control program proceeds to step 115, the CPU
is the set result 1==T in step 108, so “
Subtract only the month and display this subtraction result as abnormal display time 1
．． In step 116, step 1
Based on the update result tm (~0) in step 15, it is determined that it is [OJ], and then the display control program is executed in step 109,
11 Return to step 102. Thereafter, the generation of the first identification signal in step 113, the generation of the abnormality display signal in step 114, the subtraction update in step 115, and the determination as "NO" in step 116 are repeated, and the update result tz=0 in step 115 is repeated.
If YESJ is established, the CPU goes to step 116 to
Then, in step 117, the remaining amount display time tN is set to a predetermined value To in the first counter. After such setting, the remaining amount display time tN=T
The CPU executes the display control program through steps 103 to 107 until time o has passed.

Further, during the execution of the display-control program passing through step 105 (or 114) as described above, when the display selection mechanism 20 generates, for example, a fourth selection signal by its operation, the CPU sends the display selection mechanism 60 in step 109.
Upon receiving the fourth selection signal from YK, in step 110
SJ, and in step 118, the selected physical quantity display time tc is set to a predetermined value T2 (
Thereafter, in step 119, the fourth selection signal is stored in the RAM. Therefore, the CPU determines "NO" in step 106 based on the set result tc-T2 in step 118.
In step 120, a fourth identification signal is generated in relation to the stored result in step 119, and in step 121, a voltage (■) is calculated based on the fourth binary signal in relation to the stored result in step 119. and is generated as a selected physical quantity display signal.

Then, the drive circuit 50 generates a fourth lighting signal in response to the fourth identification signal from the CPU, and generates a second drive signal corresponding to the value of the signal in response to the selected physical quantity signal from the CPU. do. Next, the lamp 74 of the lamp panel 70 is turned on in response to the fourth lighting signal from the drive circuit 50, and the liquid crystal panel 60 is turned on in response to the second drive signal from the drive circuit 50. The voltage ■ is displayed in blue in the form of a bar graph by a liquid crystal segment capable of displaying blue as defined by . In other words, since the blue display on the liquid crystal panel 60 is displayed together with the voltage identification display by lighting the lamp 74, the driver can visually confirm that the power supply state by the DC power source is normal. In addition, in this case, the blue display of the voltage (2) is displayed on the same display surface of the liquid crystal panel 6o instead of the two consecutive blue displays of the remaining fuel amount Qf and red displays of the water temperature T, so this kind of display This is more effective in saving the display space of the device.

When the display control program proceeds to step 122, the CPU
is obtained from the set result tc-T2 in step 118 as “
Subtract only the month and select this physical quantity display time tc
After that, the display control program returns to step 102. Thereafter, l'-N in step 106
oJ, the generation of the fourth identification signal in step 120, the generation of the selected physical quantity signal in the step 11 output knob 121, and the subtraction update in step 122 are repeated, and when the update result tc=0 is established in step 122, the CPU executes the step The determination in step 106 is ``YES'', and the display control program proceeds to step 105 or step 116 in the same manner as described above in relation to the determination results in steps 104 and 111.

In addition, in the above-mentioned operation, the calculations in steps 111 to 117 when the water temperature T becomes abnormal, or the calculations in steps 110 and 118 when the display of voltage ■ is selected.
, 119, 103, 120 to 122 have been described, but the calculation is not limited to this, and other physical quantities P, Q
o, V, I.

Substantially the same effect as described above is achieved also when any one of Qf becomes abnormal, or when display of any of the other selected physical quantities T, P, Qo, and ■ is selected.

In addition, in the above embodiment, the remaining amount of fuel Qf is set to 1b.
is repeatedly displayed during the remaining amount display time, and one of the selected physical quantities T, P, Qo, V, and M is repeatedly displayed during the selected physical quantity display time. The remaining physical quantities may be selectively displayed, and the content and number of these physical quantities may be changed as appropriate.

Further, in the above embodiment, the first to sixth discriminant values were adopted as the discrimination criteria in step 111, but instead, the first to sixth normal regions were adopted corresponding to each of these discriminant values. And each physical quantity T.

When P+ Qo +V+ Engineering + Qf reaches the upper limits of the first to sixth normal regions, the abnormality display signal is generated as the first abnormality display signal, and the lower limits of the first to sixth normal regions are reached. The second abnormality display signal may be generated when the liquid crystal panel 6
The liquid crystal panel 60 consists of three liquid crystal segments that can display each color of blue, red, and yellow.
Under the control of the drive circuit 50 responsive to the second abnormality display signal, a yellow bar graph is displayed to indicate that any physical quantity is at the lower limit of its normal range.

Further, in carrying out the present invention, the lamp panel 70
The lamp may be replaced with various electric light emitting elements, and the liquid crystal panel 60 may be replaced with a cathode ray tube or a fluorescent display tube. In this case, the display color may be changed as necessary. It may also be displayed digitally.

Further, in the above embodiment, an example was explained in which the lamp panel 70 was used to identify the display of each selected physical quantity, but instead of this, for example, a cathode ray tube may be used in place of the liquid crystal panel 60, and the cathode ray tube The lamp panel 70 may be omitted and the lamp panel 70 may be omitted so that information necessary for identification is displayed together with each selected physical quantity on the display surface.

As explained above, in the present invention, as exemplified in the above embodiment, at least the first and second
a detection means for detecting a physical quantity and generating these rain detection results as first and second detection signals, respectively; a selection means for generating a selection signal by being operated when selecting a display of the second physical quantity; The first physical quantity is calculated based on the first detection signal and the calculation result is generated as a first display signal, and when the selection signal is generated, the generation of the first display signal is stopped and the first physical quantity is calculated based on the second detection signal. A second physical quantity is calculated, and this liquid calculation result is generated as a second display signal for a predetermined time together with an identification signal necessary for identification, and when the predetermined time has elapsed, the first display signal is generated again. comprising a calculation means and a single display surface exposed in the interior of the vehicle, displaying the first physical quantity of rice cake on the display surface by an electro-optical conversion effect in response to the first display signal;
The present invention is characterized in that it includes display means for displaying the second physical quantity on the display surface by an electro-optical conversion effect in response to the second display signal and the identification signal. Thereby, the first and second physical quantities can be viewed from the same display surface of the display means at different times, which is effective in saving the display surface area of this type of display device. In this case, since the second physical quantity can be identified as the first physical quantity by the identification signal *missing X, there will be no error in judgment regarding the displayed content.

[Brief explanation of the drawing]

FIG. 1 is a block circuit diagram showing one embodiment of the device of the present invention, FIG. 2 is a diagram showing the display surfaces of the liquid crystal panel and lamp panel in FIG. 1, and FIG. It is a flowchart showing the action. Explanation of symbols 10a to 10f...Sensor, 20...Display selection mechanism, 30...A-D converter, 40...Microcomputer, 50...Drive circuit, 60...Liquid crystal panel,
70...Lamp panel. Applicant Nippondenso Co., Ltd. Agent Patent Attorney Teru Hase −

Claims (1)

[Claims] a detection means for detecting at least first and second physical quantities different from each other that change according to the operations of various operating devices mounted on the vehicle, and generating these rain detection results as first and second detection signals, respectively; a selection means that is operated to generate a selection signal when selecting a display of a second physical quantity; a selection means that calculates the first physical quantity based on the first detection signal and generates the calculation result as a first display signal; When the signal is generated, the generation of the first display signal is stopped and the second physical quantity is calculated based on the second detection signal, and the result of this calculation is designated as a second display signal together with an identification signal necessary for identification. a calculation means for generating the first display signal for a certain period of time and generating the first display signal again when the predetermined time has elapsed; and a single display surface exposed in the cabin of the vehicle; In response, the first physical quantity is displayed on the display surface by an electro-optical conversion effect, and in response to the second display signal and the identification signal, the second amount of material is displayed on the display surface by an electro-optical conversion effect. A vehicular composite display device comprising display means for displaying.