JPH0154725B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a multi-operation switch device for a vehicle for centrally operating vehicle equipment such as an air conditioner and a car radio. In order to reduce installation space and improve operability of a switch device for a vehicle, the inventors of the present application provided an operating member in a cutout of an acrylic sheet plate, and applied pressure by pressing the operating member. A so-called pictorial display switch device is proposed in which a plurality of switch parts each having pressurized conductive rubber or conductive rubber are provided to close the contacts. According to such a pictorial display switch device, multiple operation parts are provided on one operation panel, so in-vehicle equipment such as the air conditioner and fender mirror can be controlled at one time.
It can be operated centrally in one place. By the way, the types of in-vehicle devices that are activated by switch operations and the operation items for each device have been increasing in recent years, and even with the above-mentioned pictorial display switch device, the number of switch parts that can be arranged in one switch device has increased. Since the number of picture display switch devices is limited, if the types of equipment and operation items further increase, the number of picture display switch devices must be increased. However, since the driver is restrained by a seat belt while driving, the range in which the driver can freely operate the switch device of the vehicle-mounted equipment while driving is limited. As a result, it is difficult to install the above-mentioned pictorial display switch device without impairing the operability of the switch, as it cannot interfere with the installation of other instruments essential for driving operations such as speedometers and tachometers. It was hot. Therefore, the technical problem of the present invention is to make it possible to easily operate the switch device of in-vehicle equipment even when restrained by a seat belt, without obstructing the installation of instruments essential for driving operation, and to make it possible to easily operate the switch device of in-vehicle equipment even when restrained by a seat belt. The purpose of the present invention is to enable the display screen to be switched based on the driver's intention. In order to solve such technical problems, the present invention provides a first image that shows the distinction between on-vehicle equipment including an on-board air conditioner and a radio receiver on one screen, and a second image that shows their operation items on one screen. an image display means for switching and displaying an image; a transparent switch panel disposed in front of the screen of the image display means and having a plurality of transparent grid-like contacts; image switching means for outputting a switching command signal to the display means for switching to the second image representing the selected type of operation item when a switch part of the transparent switch panel is selected and pressed; An operation control means that outputs an operation control command signal corresponding to the operation item to the corresponding in-vehicle device when a switch part corresponding to any operation item related to the in-vehicle device is pressed in the image of 2, and a display image an image return switch set on the screen that can issue a command signal for switching back from the second image to the first image; and the image display means based on the command signal output from the image return switch. The device is a multi-operation switch device for a vehicle, characterized in that it is equipped with an image restoration means for outputting a switching signal to the first image. Hereinafter, the present invention will be explained based on the drawings. FIG. 1 is a block diagram showing one embodiment of the present invention. First, the configuration will be explained. Reference numeral 10 denotes an operation panel, which is disposed in front of the cathode ray tube 20 of the television receiver. In this embodiment of the operation panel 10, as shown in FIG. 2, transparent conductive thin films 12a to 12a, such as Nesa film, are placed on the back side of the sheet, which are the operation parts 11a to 11p (see FIGS. 3 to 6). A flexible sheet 12 made of a transparent plastic sheet coated with 12p.
And the thin films 12a to 12p of this flexible sheet 12
A sheet 13 made of transparent plastic or the like with a portion corresponding to the operation area cut out, and a pair of transparent conductive electrodes 14a made of Nesa film or the like are positioned opposite to the conductive thin films 12a to 12p. ~14p and this conductive electrode 14a~1
Transparent terminals 15a~ connected to each of 4p
A switch device having such a structure can be used as a cathode ray tube 2.
Fixed along the 0 display screen. In addition, the terminals 15a to 15p of the transparent panel 16
is an anisotropic conductive rubber 1 that conducts only in the vertical direction.
A printed circuit board 18 printed with a conductor pattern facing the terminals 15a to 15p is crimped through the terminals 15a to 15p, and when a predetermined operation area is pressed, the conductive thin film of the flexible sheet 12 is connected to the opposite transparent panel 16. A pair of conductive electrodes is closed to enter a switch-on state, and this switch signal is output from the printed board 18 through lead wires 19a to 19p. To explain the configuration with reference to FIG. 1 again, the second
Outputs from the operation panel 10 having the switch structure shown in the figure, that is, lead wires 19a to 19p drawn out from the printed board 18, are connected as inputs to an encoder circuit 30. This encoder circuit 30
In addition to the signal line from the operation panel 10, a page designation signal line 61 is connected to the page designation signal line 61, and the signal of this page designation signal line 61 is a signal corresponding to the display image displayed on the cathode ray tube 20. , the encoder circuit 30 outputs a pulse encoded signal corresponding to page information and a switch signal. The decoder circuit 40 decodes the pulse encoded signal from the encoder circuit 30, determines the type of load based on the page information, and selects one of the multiple operation items for the load determined based on the switch signal. It makes a determination and outputs a drive signal. For this reason, a drive circuit 50 is provided on the output side of the decoder circuit 40 in accordance with a plurality of operation items for each load to be operated, such as an air conditioner, a car radio, a fender mirror, etc., and is activated by the output of the decoder circuit 40. Then, the corresponding predetermined load is driven so as to operate the display item of the switch part. Further, a part of the output signal of the decoder circuit 40 is
Outputted via the display page switching signal line 41,
This display page switching signal is used to switch the display image on the cathode ray tube 20. On the other hand, a microcomputer 60 is provided as a circuit section for displaying predetermined operation items according to the type of load on the cathode ray tube 20 at a position on the display screen 20a opposite to the operation part of the switch device shown in FIG. A clock signal generator 100 is connected to the microcomputer 60, and based on this clock signal, arithmetic processing for displaying a predetermined image on the cathode ray tube 20 is executed. To explain in detail the configuration of display processing by the microcomputer 60, the microcomputer 60 includes a CPU (central processing unit) with a program calculation function, a random access memory (RAM) for data storage, and a lead-on memory that stores processing programs. It consists of memory (ROM), input/output interfaces (INPUT, OUTPUT), etc. Furthermore, 70 is a buffer memory with a capacity of 4 Kbytes, and its memory area is divided into four page memory areas 70a, 70b, 70b, 0, 1, 2, 3 pages, for example, depending on the type of image displayed on the cathode ray tube 20.
For example, in the 0 page memory area 70a, image data representing the type of load is stored corresponding to the display address on the display screen, and the remaining 1 to 3 page memory areas 70b to 70d are divided into 70c and 70d.
0d stores image data of operation items predetermined for each load in correspondence with display addresses. 71 is a selector circuit, which controls the "display mode" for outputting the page information of the buffer memory 70 for display on the cathode ray tube 20;
"CPU mode" for writing/reading from 0
This circuit switches at a predetermined cycle, and this switching cycle sets the horizontal sweep time of the cathode ray tube 20 to the "display mode" and the blanking time, which is the horizontal and vertical blanking period, to the "CPU mode". be. 72 is a display address counter that sequentially specifies the address of the cathode ray tube screen to be displayed in the display mode; 74 is a display control circuit that receives horizontal and vertical periodic signals generated by the television timing generator 77 and a clock generation circuit 78; The X and Y addresses of the cathode ray tube display screen 20a are controlled by timing pulses generated according to the minimum pixel. Further, 75 is a shift register that converts the image data output in parallel from the buffer memory 70 into serial data, 76 is a high frequency modulation circuit, and 21 is a high frequency modulation circuit that inputs the image signal high frequency converted by the high frequency modulation circuit 76 from the antenna input terminal to the cathode ray tube. This is a television receiver circuit for displaying on the screen 20a of 20. On the other hand, 73 is a cursor address counter that specifies an address to be written to or read from buffer memory 70 by microcomputer 60 in CPU mode. Note that the cursor address is the microcomputer 60 address.
A memory address that can be written to or read from. Further, 79 is a gate circuit, which is used by the microcomputer 60 to read data from the buffer memory 70. In the display device used in the present invention, in the display mode, the display address counter 7
2, the data written in the buffer memory 70 is sequentially sent to the shift register 75, converted into serial data, and displayed on the cathode ray tube 20. On the other hand, in the CPU mode, the microcomputer 60 X from,
Data can be written to or read from any address in the buffer memory 70 using the cursor address designated by each Y address. Next, the operation of the above embodiment will be explained. First, it is assumed that image data for displaying display images as shown in FIGS. 3, 4, 5, and 6 is written in each of the page memory areas 70a to 70d of the buffer memory 70, for example. . That is, the 0 page memory area 70a in FIG.
The image data displays the type of load,
Divide the display screen 20a into four equal parts and select "AIR CON"
It displays three types of loads: ``RADIO'' and ``MIRROR,'' and the remaining area is used to display the time. Therefore, this display screen is used when selecting the type of load, and is displayed in the initial state or after the operation of a specific load is completed. FIG. 4 shows a display screen for operating the car radio. Image data corresponding to this display image is written in the one-page memory area 70b of the buffer memory 70, and the operation part 11a of the operation panel 10 is shown in FIG. Predetermined operation items related to the car radio are displayed at positions 11p to 11p. In addition, operation part 11
"RETURN" displayed in parts a and 11e is
It represents the operation part for returning to the image display of the 0 page memory area shown in FIG. 3. Further, FIG. 5 shows a display screen for operating the air conditioner, and the image data for this display is stored in the 2-page memory area 7 of the buffer memory 70.
Further, FIG. 6 shows a display screen for changing the direction of the mirror surface of the fender mirror by motor drive, and the image data for this purpose is stored in the 3-page memory area 70d of the buffer memory 70. is written in. In addition, in Figures 5 and 6, there is an operation part where no operation item is displayed, but this operation part does not have the function of a switch operation part, but is left as a space or margin for mere display. has been done. On the other hand, the code bits output by the encoder circuit 30 in response to the switch signals output when the operation parts 11a to 11b of the operation panel 10 having the switch structure shown in FIG. 2 are pressed are determined as shown in Table 1 below. ing.

[Table] Furthermore, the page designation signal input from the microcomputer 60 to the encoder circuit 30 via the page designation signal line 61 based on the type of display screen, that is, the signal from the display switching signal line 41, is as follows:
It consists of the code bits shown in Table 2 below.

[Table] Therefore, the encoder circuit 30 is as shown in Tables 1 and 2 above.
It outputs a pulse encoded signal that combines the code bits of . In the embodiment of the present invention, the switch signal is determined using a 5-bit information code, and the page is determined using a 2-bit information code.
By increasing the number of bits n of the page designation signal, pulse encoded signals up to 2 ^m+n can be output. Therefore, to specifically explain the operation of the above embodiment, first, in a steady state, as shown in FIG. A page designation signal for page 0 is output to each of the display address counter 72 and the encoder circuit 30. The image in FIG. 3 is generated by outputting image data from the buffer memory 70 when the selector circuit 71 selects the display mode, and in the CPU mode, the image data is output from the 0 page memory corresponding to the time display section of the display screen. The time data is updated from the microcomputer 60 by specifying the address of the area 70a with the cursor address counter 73. In this state, for example, in order to operate a car radio, if a fingertip is inserted into the operation part 11c indicated by diagonal lines in FIG. 3, a flexible sheet corresponding to the operation part 11c is inserted as shown in FIG. 12 bends its arm downward, and the conductive thin film 12c contacts the pair of conductive electrodes 14c of the transparent panel 16 through the cutout portion of the sheet 13, and the pair of conductive electrodes 1
4c is closed, and a switch signal is output from the lead wire 19c to the encoder circuit 30 via the anisotropic conductive rubber 17c and the printed board 18. Then, the encoder circuit 30 generates a pulse code that is a combination of the page designation signal "00" input via the page designation signal line 61 at that time and the operation part signal "00011" corresponding to the switch signal of the manipulation part 11c. Outputs the conversion signal “0000011”. As shown in Figure 7, the transmission code S of this pulse encoded signal consists of a start signal _S1 consisting of a 3t mark and a 2t space, a 0 mark at a 1t mark and a 2t space, and a 2t mark. It is transmitted as an information code string S ₂ "0000011" which is "1" in a space of 1t. The transmission signal S from this encoder circuit 30 is
The signal is decoded into "0000011" by the decoder circuit 40, and a signal for switching the display page to page 1 is output to the microcomputer 60 via the display page switching signal line 41 based on the operation part signal "00011". When microcomputer 60 receives this page switching signal, it outputs a signal specifying one page memory area 70a of buffer memory 70 to display address counter 72 and encoder circuit 30 in CPU mode. Therefore, the display address counter 72
is the 1 page memory area 7 of the buffer memory 70
By sequentially specifying the address 0a, the image data written in the area 70a is output to the shift register 75, and the high frequency modulation circuit 76 and the television receiver circuit 2
1, an image for radio control shown in FIG. 4 is displayed on the cathode ray tube 20. Next, suppose that in order to turn on the radio, the display part "ON" displayed on the operation part 11m of the operation panel 10 is pressed, and in the same way as described above, the display part 11m is set corresponding to the operation part 11m. The contact of the switch part is closed, and a switch signal due to the closing of this contact is input to the encoder circuit 30, which instructs the output of the operating part signal "01101" corresponding to the operating part 11m. At this time, since the 1 page designation signal "01" is input from the microcomputer 60 via the page designation signal line 61, the encoder circuit 30
transmits "0101101" to the decoder circuit 40 with a transmission code as shown in FIG. The decoder circuit 40 receives "0101101" from the transmission signal.
The drive load is selected by the page designation code ``01'', and a signal is output from a predetermined output line corresponding to the operation code ``01101'' to turn on the radio switch. The drive circuit 50 is activated, so that the input terminal of the electronic tuner or the like becomes ground potential, and the car radio enters the receiving state. In addition, in this state, in order to return the image display to the original 0 page display, by pressing the operation part 11e where "RETURN" is displayed, the encoder circuit 30 outputs a transmission signal of "0100101". Then, it is decoded by the decoder circuit 40. In this case, the microcomputer 60 is commanded to switch to the 0 page display via the display page switching signal line 41, and the display returns to the 0 page display shown in FIG. 3 again. This kind of operation is the same for the image display for air conditioner operation in Figure 5 and the image display for fender mirror operation in Figure 6.The load is selected on the 0 page display and the cathode ray tube display is switched, and the display is changed by switching. The load can be directly actuated by pressing the operation part of the selected operation item. In addition, although the above embodiment uses a television receiver as a means for displaying image data, other devices such as LCD (liquid crystal), EL (electroluminescence), EC (electrochromic), PDP (plasma display), etc. A dot matrix panel or the like may also be used.In this case, although the display method is different from the raster scan method as in this embodiment, it is equipped with a buffer memory 70, and this buffer memory 70 is divided into a plurality of pages to store predetermined image data. interrupt,
There is no change in the control method for switching display images based on page designation. FIG. 8 shows another embodiment of the operation panel 10 shown in FIG. At positions facing the conductive thin films 12a to 12p of the flexible sheet 12, conductive rubbers 24a to 24 containing transparent silicone rubber or the like containing conductive particles or metal fibers aligned in the perpendicular direction.
Transparent silicone rubber sheet 2 with 4p model
This embodiment is characterized in that the embodiment 4 is interposed therebetween, and the other configurations are the same as the embodiment shown in FIG. The operation as a switch device in this embodiment is, for example, when the conductive thin film 12 of the flexible sheet 12
When the operation part 11a facing the a is pressed, the conductive rubber 24a of the silicone rubber sheet 24 bends downward through the flexible sheet 12, and connects with the pair of conductive electrodes 14a on the transparent panel 16. from one side of the conductive electrode 14a to the conductive thin film 12a via a conductive path in the direction perpendicular to the surface of the conductive rubber 24a, and further from the conductive thin film 12a to the conductive thin film 12a in the direction perpendicular to the other surface of the conductive rubber 24a. A short circuit is formed through the conductive path to the other conductive electrode 14a, and by closing the contacts through such an operation, the terminals 15a of the transparent panel 16, the anisotropic conductive rubber 17, and the printed board 18 are connected. A switch signal generated by pressing the operating portion 11a is output from the lead wire 19a to the encoder circuit 30 via the lead wire 19a. FIG. 9 shows another embodiment of the operation panel 10 used in the embodiment of FIG.
Transparent conductive thin films 12a to 12p such as Nesa film corresponding to a to 11p are printed, and each conductive thin film 12a
12p are connected to terminals 15a to 15p, and each conductive thin film 12a to 12p is drawn out to the outside by a lead wire 19 using a printed board 18 with an anisotropic conductive rubber 17 interposed so as to be crimped. Then, the transparent panel 16 is fixed along the front surface of the display screen 20a of the cathode ray tube 20 shown in FIG. Lead wire 19 pulled out from printed board 18
An oscillation circuit 80 is connected to each of the conductive thin films 12a to 12p, and the oscillation circuit 80 is configured such that the oscillation frequency changes depending on the capacitance of the human body when a fingertip or the like touches the conductive thin films 12a to 12p. A change in oscillation frequency is converted into a pulse signal by a waveform shaping circuit 90, and a switching circuit 110 is operated to output a switch signal to an encoder circuit 30. According to this embodiment, the structure of the switch device constituting the operation panel 10 can be simplified,
In addition, the switch operation can be performed by simply touching the operating portion of the transparent panel 16, that is, the conductive thin films 12a to 12p with the fingertip, thereby improving the operability. FIG. 10 shows another embodiment of the operation panel 10 shown in FIG. 1, in which the structure of the switch device is the same as the embodiment shown in FIG. 12p, a weak alternating current always flows through them, so when a fingertip or the like touches the conductive thin films 12a to 12p, the hum detection circuit 120 detects the alternating frequency signal flowing through the human body, and the waveform shaping circuit detects the alternating current frequency signal flowing through the human body. The switching circuit 110 is operated through the switch 90, and as in the embodiment shown in FIG. 9, the switch structure can be simplified and the operability can be improved. As explained above, according to the present invention, a switch device having a plurality of switch parts is made of a transparent member, and this switch device is provided on a display screen of a cathode ray tube or the like, and the display image of the cathode ray tube is The operation items corresponding to the type of load are displayed on the operation part of the switch device, and when the switch part is operated, the load is adjusted based on the switch signal from the switch part and the signal representing the type of display screen. Even if the number of operation items exceeds the number of switch parts of the switch device,
By switching the display screen, a plurality of predetermined operations can be performed for each load using the same switch device. Therefore, it is sufficient to install the switch device according to the present invention in one place where the driver can easily operate the switch even when the driver has fastened his seat belt, so it is possible to easily operate the switches on various in-vehicle devices. Therefore, the operability is not impaired and the driving operation is also favorable. Furthermore, since the present invention includes a switch for returning the display screen from the second image to the first image, the second image will be retained unless the switch is operated. As a result, the display screen can be changed, for example, when using the in-vehicle door mirror device to back into the garage, or when the air conditioner is activated until the temperature inside the vehicle has stabilized. This is extremely effective when it is necessary to operate the switch continuously for a relatively long period of time. Furthermore,
Another advantage is that other information such as the time can also be displayed in the blank space when not being used as a switch device or when displaying operation items.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an embodiment of the present invention, Fig. 2 is an exploded explanatory diagram showing an embodiment of the operation panel used in Fig. 1, and Figs. 3, 4, 5, and 6 are display images. FIG. 7 is a waveform diagram showing a transmission signal of operation part detection information; FIG. 8 is an exploded explanatory diagram showing another embodiment of the operation panel used in the present invention; FIG. FIG. 10 is an explanatory diagram showing another embodiment of the operation panel of the present invention having a touch switch structure. DESCRIPTION OF SYMBOLS 10... Operation panel, 11a-11p... Operation site, 12... Flexible sheet, 12a-12p... Conductive thin film, 13... Sheet, 14a-14p... Conductive electrode, 15a-15p... Terminal, 16... Transparent panel, 17... Anisotropic conductive rubber, 18... Printed board,
19, 19a-19p...Lead wire, 20...Cathode ray tube, 20a...Display screen, 21...TV receiver circuit, 24...Transparent silicone rubber sheet, 24a-2
4p...Conductive rubber, 30...Encoder circuit, 40
...Decoder circuit, 41...Display page switching signal line, 50...Drive circuit, 60...Microcomputer, 61...Page designation signal line, 70...Buffer memory, 70a-70d...Page memory area, 71
...Selector circuit, 72...Display address counter, 73...Cursor address counter, 74
...Display control circuit, 75...Shift register, 76...High frequency modulation circuit, 77...Television timing generator, 78...Clock generation circuit, 79...Gate circuit, 100...Clock signal generator, 80...Oscillation circuit, 90...Waveform shaping circuit, 11
0...Switching circuit, 120...Hum detection circuit.

Claims (1)

[Scope of Claims] 1. Switching and displaying a first image that shows the distinction between in-vehicle devices including an in-vehicle air conditioner and a radio receiver on one screen, and a second image that shows their operation items on one screen. an image display means; a transparent switch panel disposed in front of the screen of the image display means and provided with a plurality of transparent grid contacts; and a switch portion of the transparent switch panel corresponding to any type of the first image. image switching means for outputting a switching command signal to the display means for switching to the second image representing the selected type of operation item when selected and pressed; an operation control means for outputting an operation control command signal corresponding to the operation item to the corresponding in-vehicle device when a switch part corresponding to one of the operation items is pressed; an image return switch set on the screen that can issue a command signal for switching back to the first image; A multi-operation switch device for a vehicle, comprising: image restoration means for outputting a switching signal.