JP2006318175A - Key input device and remote control transmitter with key input device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a key input device allowing production of the key input device of different specifications in a short period by only changing a print pattern of a keyboard switch part 3. <P>SOLUTION: A plurality of movable side lead wires 7 and fixed side lead wires 9 formed by being printed on a flexible film board 5 of the keyboard switch part 3 are correspondingly connected to a plurality of signal pins of a microcomputer 2. A depressed key 12 is detected by connecting a pair of the movable side lead wire 7 and the fixed side lead wire 9. By only changing the print pattern, a layout of the key 12 can be changed. Even if correspondence connection relation with the signal pins become different, the depressed key 12 can be detected by writing a control program fit for key 12 detection operation thereof into a programmable ROM 4. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a key input device or a remote control device equipped with a key input device that detects a key that is pressed down and outputs key data corresponding to the key, and more specifically, these operations The present invention relates to a key input device executed by a microcomputer provided in a key input device by a control program written in a programmable ROM and a remote control transmitter including the key input device.

  A key input device that includes a keyboard switch unit composed of a plurality of keys and outputs key data corresponding to one of the depressed keys is provided in a device that performs various operations in accordance with an input operation. Of these, the keyboard switch has a simple structure in which the keys facing the movable electrode and the fixed electrode and the lead lines connected to these electrodes are simply wired, so two printed sheets with the electrodes and lead lines printed on it are possible. 2. Description of the Related Art There is known a keyboard switch unit that is configured by simply overlapping or bending a flexible film substrate. (For example, refer to Patent Document 1).

U.S. Pat. No. 4,440,990 (Patent 4, page 3, column 3, FIGS. 1 and 2)

  7 and 8 are a development view of the film substrate 102 constituting the keyboard switch unit 101 described in Patent Document 1 and a perspective view of the keyboard switch unit 101. The film substrate 102 may be a Mylar film or the like. Made of flexible insulating plastic sheet. As shown in FIG. 7, a movable substrate 102A, a fixed substrate 102B, and an external connection tail 102C are integrally formed on a single film substrate 102, and formed at the boundary between the movable substrate 102A and the fixed substrate 102B. The movable side substrate 102A and the fixed side substrate 102B are folded over by the slit 103.

  The movable side substrate 102A has a plurality of movable electrodes 104, 104,... And a plurality of movable side lead lines 106, 106,... Connected to each of the three movable electrodes 104, and the fixed side substrate 102B. Are formed with a plurality of fixed electrodes 105, 105... And a plurality of fixed lead-out lines 107, 107... Connected to each of the four fixed electrodes 105. The electrodes 104 and 105 and the lead lines 106 and 107 are formed by printing conductive ink on one surface of the film substrate 102 by screen printing. The pair of movable electrode 104 and fixed electrode 105 are formed in symmetrical positions with respect to the slit 103 to be bent, and a pair of pairs in the state shown in FIG. 8 in which the movable side substrate 102A and the fixed side substrate 102B are folded. The movable electrode 104 and the fixed electrode 105 face each other to form one key.

  Each movable electrode 104 and fixed electrode 105 is formed at the intersection of the movable lead wire 106 and the fixed lead wire 107 wired in a matrix, so that there is a gap between the pair of movable electrode 104 and fixed electrode 105. When connected, of the plurality of movable lead lines 106 and fixed lead lines 107, only one set of movable lead lines 106 and fixed lead lines 107 are connected.

  The plurality of movable-side lead wires 106, 106 and fixed-side lead wires 107, 107,... Are led out to the external connection tail 102C, and the end of the external connection tail 102C is inserted into the connector 108 and connected. Is electrically connected to key data output means comprising a microcomputer (not shown).

  As shown in FIG. 8, a through hole is formed in a portion where the key is formed so that the movable electrode 104 and the fixed electrode 105 facing each other are not in contact with each other between the movable substrate 102A and the fixed substrate 102B to be folded. A key input display 110 is printed on a portion where the movable electrode 104 is formed so that the movable electrode 104 can be pushed down on the surface side of the movable substrate 102A. A flexible pressing sheet 111 is arranged.

  When one of the keys is depressed and the movable electrode 104 comes into contact with the opposite fixed electrode 105, the key data output means is in contact with only one set of the movable lead wire 106 and the fixed lead wire 107. The movable electrode 104 and the fixed electrode 105, that is, the depressed key are detected, and key data corresponding to the key is output.

  The key input device including the keyboard switch unit 101 and the key data output means can be formed lightweight and thin simply by printing the electrodes 104 and 105 and the lead lines 106 and 107 on the film substrate 102. Used as a portable portable key input device, for example, operation control data for controlling the operation of the controlled device is output as key data output from the key data output means, and the operation control data is transmitted to the controlled device by an infrared signal. Used as key input device for remote control transmitter to transmit.

  The above-described conventional keyboard switch unit 101 can obtain a versatile keyboard switch unit 101 according to the number of keys and the key layout change only by changing the printing pattern on the film substrate 102.

  On the other hand, as a key data output means for detecting a pressed key of the keyboard switch unit 101 and outputting key data corresponding to the key, a microcomputer incorporating a ROM (Read Only Memory) is generally used. The microcomputer executes the above operation according to the stored control program. The built-in ROM is used as a memory to store the boot program that starts the system and the control program that controls the operation of the fixed microcomputer because the contents of the written program do not change without receiving power. A mask ROM (Mask Read Only Memory) programmed at the time of manufacture is generally used because there is no circuit for writing a program and the cost is relatively low.

  On the other hand, this mask ROM lacks the versatility that it cannot be programmed after manufacturing to match the specifications of different key input devices, and if the same key input device is not mass-produced, effective cost reduction is realized. Can not do it. In addition, since it takes a long time to manufacture a mask ROM in which a control program is stored, a key input device that conforms to a specific specification cannot be manufactured in a short time.

  For this reason, even if the above-described versatile keyboard switch unit 101 is used, in the entire key input device constituted by the key data output means, the number of keys of the keyboard switch unit 101 is changed or the key data to be output is changed. Therefore, it was not possible to make the device versatile.

  Further, when a key input device having a new specification is manufactured, since it takes a long time to manufacture a mask ROM that stores a control program in accordance with the specification, it cannot be manufactured in a short time.

  Further, when the above key input device is used as a key input device of a remote control transmitter, even if the key layout of the keyboard switch unit 101 is the same, the operation control data differs for each controlled device. It is necessary to manufacture a ROM in which a new control program is stored. Not only can the ROM be manufactured in a short period of time, but the inventory of remote control transmitters for each controlled device increases, leading to an increase in cost.

  The present invention has been made in consideration of such conventional problems, and a key input device having a different specification can be manufactured in a short period of time simply by changing the printing pattern of the keyboard switch section. An object is to provide an input device.

  It is another object of the present invention to provide a general-purpose remote control transmitter capable of controlling the operation of different types of controlled devices using a keyboard switch unit and key data output means having the same configuration.

In order to achieve the above object, a key input device according to claim 1 detects a keyboard switch part composed of a plurality of keys and a depressed key of the plurality of keys, and key data corresponding to the depressed key. In the key input device including the key data output means for outputting the keyboard data, the keyboard switch unit prints on the movable side substrate and the fixed side substrate formed of a flexible film substrate, and on the movable side substrate facing the fixed side substrate. And a plurality of fixed side lead lines formed by printing on a fixed side substrate facing the movable side substrate so as to intersect the plurality of movable side lead lines in a matrix. A plurality of movable electrodes formed by printing on the movable side substrate continuously to the movable side lead lines at each crossing position of the movable side lead lines and the fixed side lead lines; And a fixed side substrate facing each other with an insulating gap therebetween, and a plurality of fixed electrodes formed continuously from the fixed side lead wire, and a key is formed from a pair of opposing movable electrodes and fixed electrodes, The key data output means is mounted on the rigid printed circuit board, and a plurality of signal pins are connected to each movable lead line and fixed lead line via the land pattern of the rigid printed circuit board, thereby moving the movable side lead Detects the connection between the lead wire and the fixed lead wire, detects the key at the intersection of the movable lead wire and fixed lead wire that detected the connection as a depressed key, and detects the key data corresponding to the depressed key. A microcomputer for outputting and a control program built in the microcomputer for controlling the operation of the microcomputer can be written. And a program ROM,
After the microcomputer is mounted on the rigid printed circuit board, a plurality of keys and an arbitrary control program in accordance with key data representing the keys can be written to the programmable ROM.

  When any key of the keyboard switch part is pressed, the movable electrode of the pressed key comes into contact with the opposite fixed electrode, and when the movable electrode and the fixed electrode are in contact, a set of movable members connected to these electrodes. The side lead wire and the fixed side lead wire are connected.

  Since the microcomputer has a plurality of signal pins correspondingly connected to each movable lead line and fixed lead line, by detecting a connection between one set of the movable lead line and the fixed lead line among them. The depressed key is detected, and key data corresponding to the key is output.

  The number of keys and the key layout of the keyboard switch section can be easily changed by changing the number of electrodes and lead lines and the printing position of the printing pattern. Even if the specifications of the keyboard switch part are different and the number of movable and fixed lead lines corresponding to multiple signal pins and the corresponding relationship are different, the pressed key of the keyboard switch part By writing the control program to be detected into the programmable ROM and operating the microcomputer, the depressed key can be detected without changing the configuration of the key data output means.

  Also, by writing a control program in accordance with the operation of the microcomputer that outputs any different key data into the programmable ROM, any key data can be output without changing the configuration of the key input device.

  Since the control program is written to the programmable ROM after the microcomputer is mounted on the rigid printed circuit board, the keyboard switch unit and the output are made using the same key data output means composed of the microcomputer mounted on the rigid printed circuit board. A key input device corresponding to a change in specification of key data can be obtained.

  According to another aspect of the key input device of the present invention, the control program of the program ROM connects the land pattern of the rigid printed wiring board on which the microcomputer is mounted to the writing terminal of the on-board writer, and the microcomputer signal is transmitted via the land pattern. It is written from a pin.

  The land pattern of the rigid printed circuit board is connected from the signal pin to the programmable ROM built in the microcomputer, and before connecting the movable lead wire and fixed lead wire of the keyboard switch part, the write terminal of the on-board writer is connected. Can connect. A rigid printed wiring board mounted with a microcomputer is placed on an on-board writer, a land pattern and a writing terminal are connected, and a control program is written from the on-board writer to the programmable ROM.

  A remote control transmitter comprising the key input device according to claim 3 outputs, as key data, operation control data for controlling the operation of the controlled device from the microcomputer, and the key input device according to claim 1 or 2, A remote control transmitter comprising an infrared transmission means for transmitting operation control data output from a microcomputer to a controlled device by an infrared signal, and after mounting the microcomputer on a rigid printed circuit board, a plurality of It is possible to write a key and an arbitrary control program in accordance with operation control data corresponding to the key into the programmable ROM.

  Remote control transmitter that controls the operation of different controlled devices using the same key input device by writing an arbitrary control program that matches the operation control data corresponding to the keys into the programmable ROM. Is obtained.

  The remote control transmitter provided with the key input device according to claim 4 is characterized in that the circuit elements constituting the infrared transmission means are mounted on a rigid printed circuit board on which a microcomputer is mounted.

  The circuit elements constituting the microcomputer and infrared transmission means that are difficult to mount on the flexible film substrate are separated from the keyboard switch formed by the flexible film substrate and mounted on the same rigid printed circuit board. Mounting in the same mounting process is possible.

  According to the first aspect of the present invention, the rigid printed circuit board on which the microcomputer is mounted can be used in common for the keyboard switch unit and the key input device having different specifications of the key data to be output, and the same product is mass-produced. Can be manufactured inexpensively.

  In addition, since the rigid printed wiring board on which the microcomputer is mounted does not have a plurality of fixed electrodes and fixed lead wires constituting the keyboard switch part, the rigid printed wiring board can be made smaller and manufactured at low cost. A printed wiring board on an on-board writer is not required when writing a control program into a microcomputer program ROM mounted on a rigid printed wiring board without requiring a large mounting space in a mounting process for mounting electronic components such as computers. The installation area is small, a large number of printed wiring boards can be mounted, and simultaneously a control program can be written into a large number of program ROMs.

  Furthermore, since the keyboard switch portion is formed of a film substrate on which electrodes and lead lines are printed, the keyboard switch portion can be reduced in weight and thickness, and is suitable for a key input device provided in a portable device to be carried.

  According to the invention of claim 2, since the land pattern for connecting the movable lead wire and the fixed lead wire of the keyboard switch portion to the signal pin is used, the connection portion for connecting to the writing terminal of the on-board writer is provided. There is no need to provide it separately.

  In addition, since the program ROM and the writing terminal are connected without using the IC socket, there is no replacement work of the IC socket due to contact wear, and the control program can be written into a large amount of program ROM.

  In addition, according to the invention of claim 3, a control program for outputting arbitrary operation control data corresponding to the depressed key is stored in the programmable ROM in the manufacturing process. An appropriate amount of a remote control transmitter corresponding to various controlled devices can be manufactured in a short time from the components constituting the transmitting means in accordance with the demand of the controlled devices.

  According to invention of Claim 4, the rigid printed wiring board which mounted the microcomputer and the circuit element which comprises an infrared transmission means is a general-purpose component used in common with the remote control transmitter corresponding to a different controlled apparatus. can do. By combining with a keyboard switch that can change the specifications only by changing the print pattern, it is possible to manufacture remote control transmitters that meet the various specifications using common components.

   Hereinafter, a key input device 1 and a remote control transmitter 10 including the key input device 1 according to the present invention will be described with reference to FIGS. FIG. 1 is a block diagram showing a main part of the remote control transmitter 10, and FIG. 2 is a block diagram showing a configuration inside a microcomputer (hereinafter referred to as a microcomputer) 2. In these drawings, a key input device 1 is composed of a keyboard switch unit 3 and a microcomputer 2 incorporating a programmable ROM (hereinafter referred to as PROM) 4.

  As shown in FIG. 3, the keyboard switch unit 3 has a movable side substrate 5A and a fixed side substrate 5B formed from a single flexible insulating plastic film substrate 5, and is bent at the boundary between them. It is designed to be stacked.

  The movable side substrate 5A has 20 movable electrodes 6, 6,... In a matrix of 5 rows and 4 columns, and four movable side lead lines 7, 7,... Connecting the movable electrodes 6 for each column. In addition, when the movable side substrate 5A and the stationary side substrate 5B are folded, the fixed side substrate 5B is fixed to 20 fixed elements in 5 rows and 4 columns at a position facing the movable electrodes 6, 6,. .. And five fixed lead-out lines 9, 9,... Connecting the fixed electrodes 8 formed in a matrix for each row are formed.

  Between the movable side substrate 5A and the fixed side substrate 5B to be folded, an insulating spacer sheet 11 is sandwiched in a region where the movable electrode 6 and the fixed electrode 8 are formed. A pair of the movable electrode 6 and the fixed electrode 8 are opposed to each other with a slight insulating gap by the through hole 11a of the insulating spacer sheet 11, and the pair of the movable electrode 6 and the fixed electrode 8 which are opposed to each other hold the one key 12. Constitute. Here, the insulating electrode sheet 11 is interposed, and the movable electrode 6 and the fixed electrode 8 are separated in a normal state where the key 12 (movable electrode 6) cannot be pushed down. For example, the movable electrode 6 is printed. The movable substrate 5A may be curved so as to be separated from the fixed substrate 5B, and the movable electrode 6 and the fixed electrode 8 may be opposed to each other with a slight insulating gap.

  The set of movable electrode 6 and fixed electrode 8 constituting the key 12 is formed at the intersection of the movable side lead line 7 and the fixed side lead line 9 wired in a matrix form. When the fixed electrodes 8 are connected, only one set of the movable lead wire 7 and the fixed lead wire 9 out of the plurality of movable lead wires 7 and fixed lead wires 9 are connected.

  As shown in FIG. 3, the length of the rectangular movable side substrate 5A in the longitudinal direction is slightly longer than the length of the fixed side substrate 5B in the same direction, and four on the one side in the longitudinal direction of the movable side substrate 5A. Four movable connection electrodes 13, 13... Connected to the movable lead wire 7, and five fixed connection electrodes 14, 14... Slightly longer than the movable connection electrode 13 are formed. . The movable side connection electrode 13 and the fixed side connection electrode 14 are formed at portions corresponding to land patterns (L1 to L9) of the printed wiring board 15 described later at an equal pitch.

  Further, when the movable-side substrate 5A is folded on one side in the longitudinal direction of the fixed-side connection electrode 14, the fixed-side connection electrode 14 is connected to the five fixed-side lead wires 9 at the portions facing each other. .. Are formed. Therefore, as shown in FIG. 5, when the movable side substrate 5 </ b> A and the fixed side substrate 5 </ b> B are folded, the five fixed side lead wires 9 are respectively connected to the five fixed side connection electrodes 14 via the lead electrodes 16. Connected to.

  The electrodes 6 and 8, the lead lines 7 and 9, the connection electrodes 13 and 14, and the lead electrodes 16 formed on the opposing surfaces of the movable side substrate 5A and the fixed side substrate 5B are made of conductive material such as silver or carbon. It is formed by printing on one surface of the film substrate 5 by screen printing using ink. In particular, since the opposing surfaces of the movable side substrate 5A and the fixed side substrate 5B to be folded are the same surface of the film substrate 5, they can be formed together by one printing.

  As shown in FIGS. 4 and 5, the movable electrode 6 is provided on the surface side (upper side in FIG. 5) of the folded movable substrate 5 </ b> A so that the movable electrode 6 can be pushed down for each key 12. A flexible rubber sheet 17 having an operation knob 17a projecting integrally therewith is disposed on the surface side portion to be formed. One side in the longitudinal direction of the flexible rubber sheet 17 is a thick pressing portion 17b so that the movable side connection electrode 13 and the fixed side connection electrode 14 and the land pattern L are in contact with each other with a predetermined contact pressure. The movable substrate 5A is sandwiched between the printed circuit board 15 and the movable substrate 5A.

  The printed wiring board 15 is generally formed by forming a copper foil surface on the front or back surface of a rigid substrate impregnated with glass cloth, kraft paper or the like with a thermosetting epoxy resin or phenol resin, and performing chemical treatment such as etching. In the present invention, any material and structure may be used as long as they have a predetermined rigidity that enables electronic components such as the microcomputer 2 to be mounted. . In this embodiment, since each electronic component is mounted by soldering, a substrate having predetermined heat resistance is used.

  The keyboard switch unit 3 and the printed wiring board 15 are connected to the land patterns (L1 to L4) among the nine land patterns (L1 to L9) formed along one side of the surface of the printed wiring board 15. The four movable side connection electrodes 13 of the keyboard switch unit 3 are bonded to the land patterns (L5 to L9) by the five fixed side connection electrodes 14 with a conductive adhesive. Connected (see FIG. 3). The land pattern (L1 to L9) and the movable side connection electrode 13 or the fixed side connection electrode 14 are connected by soldering, bonding with an anisotropic conductive adhesive, connection by a connector mounted on the printed circuit board 15, or the like. You may connect by various other methods.

  As shown in FIG. 1, the microcomputer 2 mounted on the printed wiring board 15 connects the signal pins (KI, KI / O) to nine land patterns (L1 to L9), respectively. 3, the depressed key 12 is detected. In other words, the microcomputer 2 outputs key scan signals from the signal pins (KI / 01 to KI / 05) to the five fixed lead-out lines 9 via the fixed connection electrodes 14 at different timings, and is movable. When a key scan signal is input from any one of the signal pins (KI0 to KI3) connected to the four movable-side lead wires 7 via the side connection electrode 13, the signal pin (to which the key scan signal is input) The key 12 with the movable electrode 6 pushed down is detected from KI0 to KI3) and signal pins (KI / 01 to KI / 05) that output the key scan signal when input.

  The VDD terminal of the microcomputer 2 is connected to the DC power source 18 and receives the DC power source Vdd as a driving power source. Here, the DC power supply 18 is a battery housed in the case 19 of the remote control transmitter 10.

  An oscillator 20 connected between the OSC-O terminal and the OSC-I terminal of the microcomputer 2 is used to generate a clock having a predetermined period in the microcomputer 2, and the microcomputer 2 divides the clock to generate a modulation signal described later. The carrier wave is generated.

  The REM terminal of the microcomputer 2 is connected to the transistor 21 acting as a switching element, and outputs a modulation signal to the base of the transistor 21, whereby the infrared light emitting diode 22 connected in series with the transistor 21 with respect to the DC power supply 18. The light emission is controlled.

  As shown in FIG. 2, in the microcomputer 2, an input / output port KI / O, an input port KI, a CPU (Central Processing Unit) 23, a control program for controlling the operation of the CPU 23, a boot program, and the like are provided via a bus line. A stored PROM 4, an arithmetic RAM (Random Access Memory) 24, a carrier wave generation circuit unit 25, and the like are connected to one another.

  The CPU 23 performs calculations and operations performed by the microcomputer 2 in accordance with a control program stored in the PROM 4, and, as will be described later, when the on-board writer 30 is connected, in accordance with a boot program stored in the PROM 4. Operates and writes the control program output from the on-board writer 30 to the PROM 4. Here, the boot program is a general-purpose program written at the time of manufacturing the PROM 4 that sets the CPU 23 in the writing mode to the PROM 4 when the power supply 18 is turned on.

  The input / output ports KI / O are five input / output ports connected to signal pins (KI / 01 to KI / 05) through an interface (not shown). As described above, the pressed key 12 of the keyboard switch unit 3 is used. In order to detect this, a key scan signal is output from each input / output port at different timings. Similarly, the input ports KI are four input ports connected to the signal pins (KI0 to KI3) through an interface (not shown), and input the key scan signal.

  Here, the PROM 4 built in the microcomputer 2 uses an OTP (One Time programmable) ROM. The control program stored in the OTPROM 4 is written by the on-board writer 30 when the microcomputer 2 is mounted on the printed wiring board 15. In the present embodiment, the microcomputer 2 including the OTPROM 4 necessary for the operation of the remote control transmitter 10 is supplied to the printed wiring board 15 without using a mask ROM for writing individual control programs for controlled devices in the wafer processing process. Since the control program corresponding to each controlled device is written to the OTPROM 4 at the stage of mounting, the remote control transmitter 10 that operates various controlled devices can be manufactured in a short period of time and without inventory.

  The PROM 4 is originally a non-volatile memory, but is a memory device that can be rewritten to the minimum necessary. Therefore, the PROM 4 built in the chip of one microcomputer 2 has an address bus, a data bus, etc. directly pulled out to the outside. Not. Therefore, when writing a control program into the PROM 4, a boot program is activated to switch the operation mode of the microcomputer 2, and a signal pin, here a keyboard switch unit, is drawn from the microcomputer 2 for connection to peripheral circuits and systems. 3 is used as a signal pin for accessing the PROM 4 via the CPU 23, and a control program is written.

  When the control program is written to the OTPROM 4 by the on-board writer 30, as shown in FIG. 6, the surface of the printed wiring board 15 where the land patterns (L1 to L9) connected to the signal pins (KI, KI / O) are exposed. Is placed on the on-board writer 30 and the land patterns (L1 to L9) are connected to the write terminals of the on-board writer 30 (not shown) facing each other, and the signal pins (KI, KI / O) of the microcomputer 2 are connected. An arbitrary control program is written to the PROM 4 via

  In general, the control program is written to the PROM 4 by inserting the signal pins of the PROM 4 into the write terminals of the ROM socket of the ROM reader and connecting them together. Is about 10,000 times, and when a control program is written into a large amount of PROM 4, it is necessary to replace the IC socket each time. In the present embodiment, as described above, the control program can be written simply by positioning the land patterns (L1 to L9) on the writing terminals of the on-board writer 30 and placing the printed wiring board 15. It is possible to mass-produce a remote control transmitter that operates according to a predetermined control program without replacing the connecting parts without causing wear and fatigue of the writing terminal.

  In addition to the microcomputer 2 configured as described above, the circuit components shown in FIG. 1 except for the keyboard switch unit 3 are collectively mounted on the printed wiring board 15 using, for example, the same mounting machine. Subsequently, in a state where the movable side connection electrode 13 and the fixed side connection electrode 14 of the keyboard switch unit 3 are in contact between the land patterns L of the printed wiring board 15, the flexible rubber sheet 17 is overlaid on the film substrate 5, As shown in FIG. 5, the operation knob 17a is assembled in a case 19 composed of an upper case 19A and a lower case 19B in which a through hole is formed at a position where the operation knob 17a is projected.

  In this embodiment, the back side of the fixed side substrate 5B formed by the flexible film substrate 5 is supported by the rigid lower case 19B. However, a rigid plate is laminated on the back side of the lower case 19B. And may be supported so as not to bend toward the back side.

  Hereinafter, with respect to the remote control transmitter 10 configured as described above, the operation of the remote control transmitter 10 in which the control program is written in the OTPROM 4 is controlled so as to control the operation of a specific controlled device, for example, a television receiver. explain.

  When the control operation knob 17a is pushed down to cause the television receiver to perform a predetermined operation, the movable electrode 6 of the depressed key 12 comes into contact with the opposite fixed electrode 8, and the movable electrode 6 and the fixed electrode 8 that are in contact with each other. A pair of movable lead wire 7 and fixed lead wire 9 connected to each other is connected. Since the microcomputer 2 outputs the key scan signal from the signal pins (KI / 01 to KI / 05) to the five fixed lead lines 9 at different timings, the signal pin (to which the key scan signal is input ( The key 12 in which the movable electrode 6 is pushed down is detected from KI0 to KI3) and its input timing.

  According to the control program, each key 12, 12,... Of the keyboard switch unit 3 is associated in advance with operation control data such as the power supply, volume, channel switching, etc. of the television receiver. When the key 12 is pressed, the operation control data associated with the key 12 is output to the carrier wave generation circuit 25. The carrier wave generation circuit 25 divides the frequency of the clock output from the oscillator 20, generates a carrier wave of a predetermined frequency, and outputs a PPM modulation signal modulated by PPM (Pulse Position Modulation) with control data from the REM terminal.

  Accordingly, a modulation signal representing operation control data associated with the pressed specific key 12 is output from the REM terminal, and the infrared light emitting diode 22 is driven and controlled by this modulation signal, and an infrared control signal including the operation control data is generated. It is transmitted from the remote control transmitter 10. When receiving an infrared control signal transmitted from the remote control transmitter 10, for example, a television receiver as a controlled device, the operation control data is demodulated, and the operation corresponding to the pressed key 12 is performed according to the operation control data. Execute.

  Since the keyboard switch unit 3 is formed of the film substrate 5 and its printed pattern, the light and thin remote control transmitter 10 can be obtained, and a control program tailored to the controlled device can be obtained from the microcomputer 2 and the like. Since it is possible to write to the PROM 4 in a state where the electronic parts are mounted on the printed wiring board 15, the printed wiring board on which the necessary electronic parts are mounted on the microcomputer 2 and other remote control transmitter 15 incorporating the blank ROM. 15 and the keyboard switch unit 3 can be general-purpose components that can be used for various controlled devices.

  In the above-described embodiment, the example in which the key input device 1 is used as the input device of the remote control transmitter 10 for remotely controlling the controlled device has been described. As long as it outputs key data, it can be provided in all input devices used for data input.

  Further, although the OTPROM has been described as an example of the PROM, a PPROM (Production Programmed Read Only Memory), an EEPROM, an EPROM, or the like may be used as long as the control program can be written at least after the ROM is manufactured.

  The present invention is suitable for a key input device that outputs key data corresponding to a depressed key from a microcomputer by depressing a specific key.

2 is a block diagram showing a main part of a remote control transmitter 10. FIG. 2 is a block diagram showing a configuration inside a microcomputer 2. FIG. It is a perspective view which shows the keyboard switch part 3 and the printed wiring board 15 before an assembly. 2 is a perspective view showing a state in which a keyboard switch unit 3 and a printed wiring board 15 are connected. FIG. 2 is a longitudinal sectional view of a remote control transmitter 10. FIG. 2 is a perspective view showing a state in which a printed wiring board 15 is placed on an on-board writer 30 and a control program is written to a PROM 4. FIG. FIG. 6 is a development view of a conventional keyboard switch unit 101. It is a perspective view of the conventional keyboard switch part 101. FIG.

Explanation of symbols

1 Key input device 2 Microcomputer
3 Keyboard switch 4 Programmable ROM (PROM)
DESCRIPTION OF SYMBOLS 5 Flexible film board | substrate 5A Movable side board | substrate 5B Fixed side board | substrate 6 Movable electrode 7 Movable side lead wire 8 Fixed electrode 9 Fixed side lead wire 10 Remote control transmitter 12 Key 15 Printed wiring board 21 Transistor (infrared transmission means)
22 Infrared light emitting diode (infrared transmitting means)
30 Onboard writer

Claims (4)

A keyboard switch part (3) comprising a plurality of keys (12);
In a key input device comprising: key data output means for detecting a depressed key (12) of a plurality of keys (12) and outputting key data corresponding to the depressed key (12);
The keyboard switch (3)
A movable substrate (5A) and a fixed substrate (5B) formed of a flexible film substrate (5);
A plurality of movable-side lead wires (7) formed by printing on the movable-side substrate (5A) facing the fixed-side substrate (5B);
A plurality of fixed-side lead lines (9) formed by printing on a fixed-side substrate (5B) facing the movable-side substrate (5A) so as to intersect the plurality of movable-side lead lines (7) in a matrix. ,
A plurality of movable electrodes (5A) formed by printing on the movable substrate (5A) in succession to the movable lead wire (7) at each intersecting position of the movable lead wire (7) and the fixed lead wire (9). 6) and
A plurality of movable electrodes (6) and a fixed side substrate (5B) facing each other with an insulating gap therebetween, and a plurality of fixed electrodes (8) formed continuously to the fixed side lead wire (9),
A key (12) is formed from a pair of opposing movable electrodes (6) and fixed electrodes (8),
Key data output means
Mounted on the rigid printed circuit board (15), and via the land pattern (L) of the rigid printed circuit board (15), a plurality of signal pins are connected to each movable side lead line (7) and fixed side lead line (9). By making a corresponding connection, the connection between the movable lead line (7) and the fixed lead line (9) is detected, and the intersection position of the movable lead line (7) and the fixed lead line (9) where the connection is detected. A microcomputer (2) for detecting the key (12) of the key as a depressed key (12) and outputting key data corresponding to the depressed key (12);
A program ROM (4) built in the microcomputer (2) and capable of writing a control program for controlling the operation of the microcomputer (2);
After mounting the microcomputer (2) on the rigid printed circuit board (15), it is possible to write a plurality of keys (12) and any control program that matches the key data representing the keys (12) to the programmable ROM (4). A key input device characterized by that. The control program of the program ROM (4) connects the land pattern (L) of the rigid printed circuit board (15) on which the microcomputer (2) is mounted to the write terminal of the on-board writer (30), and the land pattern ( 2. Key entry arrangement according to claim 1, characterized in that it is written from a signal pin of the microcomputer (2) via L). The key input device according to claim 1 or 2, wherein operation control data for controlling the operation of the controlled device is output from the microcomputer (2) as key data.
A remote control transmitter comprising infrared transmission means (21, 22) for transmitting operation control data output from the microcomputer (2) to a controlled device by an infrared signal,
After mounting the microcomputer (2) on the rigid printed circuit board (15), a plurality of keys (12) and an arbitrary control program according to the operation control data corresponding to the keys (12) are stored in the programmable ROM (4). 3. A remote control transmitter provided with the key input device according to claim 1 or 2, wherein writing is possible. 4. The remote control transmission according to claim 3, wherein the circuit elements (21, 22) constituting the infrared transmission means are mounted on a rigid printed wiring board (15) on which the microcomputer (2) is mounted. Machine.

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