JPH0752325B2 - CRT preheating device for vehicles - Google Patents

Description

The present invention relates to a vehicle CRT preheating device.

(Prior Art) In recent years, the traveling position of a vehicle is displayed on a screen, and various information related to the operation is displayed, such as a navigation system that assists the operation of the vehicle, information about the running state of an electronic control system, and information about fuel consumption. The information system and so on are now installed in vehicles.

A CRT display device (hereinafter, simply referred to as “CRT”) used as a display device of such a system is conventionally provided with a preheating device for heating a CRT heater in advance so that a display can be made immediately upon use. ing. As such a preheating device, for example, a device shown in FIG. 3 that starts preheating in conjunction with the door switch 1 is known. This preheating device is turned on when the door of the driver's seat is opened. When a door open signal is output from the door switch 1 to the trigger circuit 2, the trigger circuit 2 generates a trigger pulse by the input of this door open signal. Is output to the monostable multi-circuit 3, and an operation signal is output from the circuit 3 to a preheating circuit 6 composed of a transistor 4 and a relay 5 connected to the collector side of the transistor 4 for a predetermined time, thereby heating the CRT 7. 7a is preheated for the predetermined time.

A drive circuit (not shown) is connected to the heater 7a. For example, when an engine start signal is input from an ignition switch, that is, when the engine is in operation,
A preheating current is supplied to the heater 7a. Therefore, when the preheating current is supplied from the drive circuit to the heater 7a during the output of the operation signal from the monostable multi-circuit 3, the operation signal from the monostable multi-circuit 3 is continuously input even if the input of the operation signal is completed. The heater 7a is configured to continue preheating.

(Problems to be solved by the invention) However, like the above-described preheating device, the preheating start of the heater is interlocked with the door switch, and the heater is preheated while the driver turns on the ignition key switch. For example, if you start riding immediately after opening the driver's seat door and start running, the heater's preheat time is not sufficient and the CRT cannot be displayed immediately, and the information from the CRT will start immediately. There was a problem that I could not get it.

The present invention has been made in view of the above points, and an object of the present invention is to provide a CRT preheating device for a vehicle that can sufficiently secure the preheating time of the heater.

(Means for Solving the Problems) In order to achieve the above object, in the present invention, in a vehicle CRT preheating device for preheating a CRT display device, a door lock / unlock state of a driver's door is detected, and a door lock state is detected. Detecting means for outputting an unlock signal when switched to the unlocked state, a door opening operation detecting means for outputting a door opening signal when the driver's door is opened, and an unlock signal from the detecting means, A first timer means for outputting a preheat signal for a predetermined time T1 and a door open signal from the door open operation detecting means for operating the first timer means, and outputs a preheat signal for a predetermined time T2. A configuration including a control device including a second timer means, and a CRT preheating circuit that operates when receiving a preheat signal from the first timer means or the second timer means of the control device It is.

(Operation) As a door opening procedure for the driver's door, it is often the case that the door is first unlocked and then the door handle is operated to open the door. The present invention has been made by paying attention to such a door opening procedure, and by starting the operation of the preheating circuit from the time when the detection means detects the door unlocked state from the door locked state of the driver's door, a longer time is obtained. Preheat time is secured.

(Example) As one example of the present invention, a CRT display device mounted on a vehicle equipped with a keyless entry system will be described in detail below with reference to the drawings.

FIG. 1 shows a schematic configuration of a CRT preheating device for a vehicle. The CRT preheating device is turned on when the driver's seat door is opened,
A door switch 10 that outputs a door open signal, and a control device (EC which is connected to the input side of a receiver 11 for keyless entry)
U) 12 and the control device 1 connected to the output side of the control device 12.
The preheating circuit 14 for starting the preheating operation of the heater 13a provided in the CRT 13 based on the command from the
Is composed of a transistor 15 and a relay 16 connected to the collector side of the transistor 15.

The receiver 11 operates together with a portable mobile transmitter 17 that transmits, for example, an infrared signal (lock / unlock signal), and is arranged on the vehicle body. I carry it. An actuator 18 for locking / unlocking the door is provided on the driver's door, and when an unlock signal is received by the receiver 11 from the transmitter 17, the receiver 11 receiving the unlock signal is received.
Outputs this unlock signal to the controller 12. Then, the control device 12 outputs a drive signal to the actuator 18, and the actuator 18 operates by this drive signal to perform the unlocking operation of the driver's seat door.

The CRT 13 has a heater 13a to which a drive circuit (not shown) similar to that described in FIG. 3 is connected. For example, when an engine start signal from an ignition switch is input,
It is set to supply a preheating current to the heater 13a.

Next, the operation of the preheating device configured as described above will be described with reference to the program flow chart shown in FIG.

First, the control device 12 determines whether or not the unlock signal is transmitted from the transmitter 17 to the receiver 11 at the previous execution time and the current execution time of the program, and the driver's door is changed from the locked state to the unlocked state. It is determined (step S20).
This determination in step S20 is executed depending on the presence or absence of the unlock signal from the receiver 11. The controller 12
After confirming whether or not the unlock signal transmitted from the transmitter 17 matches a preset secret code, it outputs a drive signal to the actuator 18.

When the driver's seat door is in the locked state, the determination result is negative (No), the preheating of the heater 13a is not started, and the state returns to the start state.

When the driver's door is in the unlocked state from the locked state, the determination result of step S20 is affirmative (Yes), and the control device 12 starts preheating of the heater 13a (step S22). This preheating is performed by the controller 12 when the unlock signal is input from the receiver 11 to the controller 12.
It is started by outputting a preheat signal to the heater 14 to start the preheat operation of the heater 13a.

With the input of the unlock signal, the control device 12 sets the timer T1 immediately after detecting the unlocked state from the locked state of the door and starts the measurement of the predetermined time T1 (for example, 30 seconds) (step S24).

Next, the control device 13 determines whether or not this predetermined time T1 has elapsed (step S26). If the determination result is negative, that is, if the predetermined time (30 seconds) has not yet elapsed, the heater 13a is executed by executing step S28 and the like described later.
However, if the determination is affirmative, the process is skipped to step S38, and the controller 12 terminates the preheating of the heater 13a after stopping the output of the preheating signal.

When the determination result of step S26 is negative, the control device 12 determines whether or not there is a door open signal from the door switch 10 (step S28). This determination is executed by inputting a door open signal to the control device 12 from the door switch 10 which is turned on by opening the door. If the result of this determination is negative,
Assuming that it is in the standby state, the steps from step S26 are repeated again.

If the determination result of step S28 is affirmative, the control device 12
Sets a timer T2 and starts measuring a predetermined time T2 (for example, 30 seconds) (step S30).

Next, the control device 12 determines whether or not this predetermined time T2 (30 seconds) has elapsed (step S32). If the determination result is negative, steps S34 and thereafter are executed to continue the preheating of the heater 13a, but if the determination is affirmative, the process skips to step S38 and the preheating of the heater 13a is ended.

When the operation from the door unlocked state to the door opening is continuously performed and the determination result in step S32 is negative, the control device 12 determines whether or not the ignition switch (IGSW) is on (step S34). . This determination is
Before or after the predetermined time T2 has elapsed, it is determined whether or not a preheating current is supplied to the heater 13a from the drive circuit (not shown), and when the ignition switch is turned on, the engine is normally started. Therefore, when the ignition switch is on, it is determined that the engine is in operation, and it is considered that the preheating current is being supplied from the drive circuit to the heater 13a. If the determination result is negative, step S32 is performed again.
Return to.

When the ignition switch is turned on within a predetermined time T2 after the door open signal is input and the preheating current is supplied from the drive circuit to the heater 13a, the determination result of step S34 becomes affirmative, and the process proceeds to the next step S36.

In step S36, it is determined whether or not the ignition switch is off, that is, the engine is stopped. This determination is to stop the preheating of the CRT13 when the preheating current from the drive circuit is stopped due to the stop of the engine.If the determination result is negative, step until the ignition switch is turned off. S36 is repeated.

In the above embodiments, the CRT display device mounted on the vehicle of the keyless entry system has been described, but if the door unlocked state can be detected from the door locked state of the driver's door, the CRT mounted on the vehicle other than the keyless entry system. Needless to say, this can be applied to the display device as well. For example, a key operation for locking / unlocking the driver's door by inserting a key into the key cylinder from outside the vehicle may be detected.

(Effects of the Invention) As described in detail above, according to the present invention, the unlocking state of the door is detected by the detection means prior to the door open signal of the door switch, and at the same time as the detection of the door unlocking state. Since the preheating of the heater is started, the preheating time of the heater can be sufficiently secured, and the information from the CRT can be immediately obtained at the same time when the running is started.

[Brief description of drawings]

FIGS. 1 and 2 explain one embodiment of the present invention. FIG. 1 is a block diagram showing a schematic configuration of a vehicle CRT preheating device, and FIG. 2 is a diagram showing the preheating device shown in FIG. FIG. 3 is a program flow chart showing the preheating procedure of the heater to be executed, and FIG. 3 is a block diagram showing the circuit configuration of a conventional vehicle CRT preheating device. 10 ... Door switch, 11 ... Receiver (detection means), 12 ...
… Control device, 13 …… CRT, 13a …… Heater, 14 …… Preheating circuit, 15 …… Transistor, 16 …… Relay.

Claims (2)

[Claims] 1. A vehicle CRT preheating device for preheating a CRT display device, which detects a door lock / unlock state of a driver's door and outputs an unlock signal when the door lock state is switched to the unlock state. Detecting means, door opening operation detecting means for outputting a door opening signal when the driver's door is opened, and first timer means for outputting a preheat signal for a predetermined time T1 when receiving an unlock signal from the detecting means. And a second timer means for receiving a door opening signal from the door opening operation detecting means during the operation of the first timer means and outputting a preheat signal for a predetermined time T2; A CRT preheating circuit that operates when receiving a preheating signal from the first timer means or the second timer means of the apparatus. 2. An actuator for locking / unlocking the driver's seat door, a moving transmitting means for transmitting a lock / unlock signal, and actuating the actuator in response to a lock / unlock signal from the transmitting means. 2. The vehicle according to claim 1, further comprising a keyless entry system having a receiving means for allowing the receiving means to function as the detecting means for detecting an unlocked state of a driver's door with an unlock signal in the keyless entry system. CR
T preheater.