JP2007004064A - Display - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To display a predetermined design, when sharing to display almost, at the same time, and to improve its appearance, even when there are variations due to display timing delays. <P>SOLUTION: This display has 1st and 2nd displays 13, 14 to share and display a predetermined design; a controller 11 for receiving multiplex signals, including a 1st detection information to operate the 1st display 13 based on the 1st detection information obtained from the multiplex signals; a drive circuit for directly receiving the 2nd detection information to directly operate the 2nd display 14, based on this detection information; and a switch 16 which is provided on the power line from the power source 2 to the 1st and 2nd displays 13, 14 and operates almost at the same time, on receiving instructions from the controller 11 to control the current to the 1st and 2nd displays 13, 14. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a display device capable of sharing and displaying a predetermined design based on each detection information.

In recent years, for example, in order to reduce the number of wires in a vehicle, multiplex communication using a LAN (Local Area Network) has been promoted. At that time, it is known that the detection information displayed on the display device is also collected from each part of the vehicle using the LAN and displayed on a display device such as a pointer instrument or a light emitting diode according to the type of the detection information. (For example, refer to Patent Document 1).
JP 2005-83926 A

  However, for example, when the detection information in the specific part is used only for the display device, or when the number of input ports of the multiplex communication ECU near the specific part from which the detection information is obtained is limited, the cost or system In some cases, the detection information is not multiplexed due to the priority order. In that case, it will be connected to the place of a display apparatus by direct electric wiring, without using LAN.

  At this time, the signal transmission of the multiplexed signal is delayed by the amount added to the processing of the multiplex communication ECU on the transmission side as compared with the case where the detection information is directly taken in from the electric wiring. For this reason, when one design display is performed by combining display driving using multiple signals and display driving using direct signals, display variations due to delay in display timing may occur, resulting in poor appearance.

  In view of the above points, an object of the present invention is to provide a display device that can be displayed almost simultaneously to improve the appearance even in such a case.

  In order to achieve the above object, the present invention employs the following technical means.

   According to the display device of the first aspect of the present invention, the first and second display means for sharing and displaying the predetermined design and the multiplexed signal including the first detection information are received and obtained from the multiplexed signal. A control means for displaying and operating the first display means based on the first detection information; a drive circuit for directly receiving the second detection information and directly displaying and operating the second display means based on the detection information; And a switch unit that is arranged in an energization path to the first and second display units and that opens and closes substantially simultaneously upon receiving a command from the control unit and controls energization to the first and second display units. And

  Thus, in the present invention, even when the display timing of the display operation instruction of the first display means from the control means and the display operation instruction of the second display means by the drive circuit is out of time, the display on the delayed side of the switch means is displayed. Since it operates so as to match the timing, it is possible to display both the display means substantially simultaneously, and it is possible to improve the appearance of the display of the predetermined design.

  According to the second aspect of the present invention, the switch means switches the first display means to the energized state when the first switch for switching the energized state to the first display means, and switches the first switch to the energized state. And a second switch for switching. Therefore, it is possible to provide a switch for each display means to ensure the amount of current to each display means and to switch the energization.

  According to the third aspect of the present invention, the switch means is commonly connected to the first and second display means, and receives a command from the control means, and switches the first and second display means to the energized state. It has 3 switches. Therefore, it becomes possible to switch the display operation of both display means using one switch.

  According to the fourth aspect of the present invention, the detection switch that opens and closes according to the detection state and generates the second detection information is provided, and the drive circuit is a series circuit of the detection switch, the second display means, and the switch means. And when the detection switch and the switch means are energized at the same time, the second display means is operated to display.

  Accordingly, in the present invention, the energization can be performed for the first time when the detection switch and the switch means are in the conductive state at the same time. Therefore, both the display means can be operated to display substantially at the same time, and the appearance of the display of the predetermined design can be improved.

  According to the fifth aspect of the present invention, since the drive circuit includes a series circuit of a detection switch that opens and closes according to the detection state and generates the second detection information and the second display means, the drive circuit can be opened and closed. Accordingly, it is possible to directly switch the energization state to the second display means, and display operation can be performed with a simple configuration.

  According to the sixth aspect of the present invention, since the first switch is constituted by a part of the driving IC capable of selectively driving the plurality of display elements, the specific display element in the first display means is selected. Only when this is done can the second display means be activated.

  According to the present invention described in claim 7, since the first display means displays that the detection information to be notified has occurred, and the second display means displays the individual contents to be notified, there is no display variation, It is possible to display effectively.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  In the present embodiment, even when a predetermined design is displayed by a plurality of pieces of detection information, for example, the number of input ports of the multiplex communication ECU near the specific part from which the detection information is obtained is limited. Only detected detection information may be multiplexed, and other detection information may not be multiplexed. In such a case, the detection information that is not multiplexed is directly connected to the instrument by electric wiring without using a LAN and transmitted.

(First embodiment)
FIG. 1 is a circuit configuration diagram showing the overall configuration of a vehicle meter. FIG. 2 is a timing chart of each signal. In FIG. 1, the door detection which detects the open / close state of each of the meter drive circuit 1, the battery 2 as an in-vehicle power source for supplying the power source voltage Vb, the ignition switch 3, the in-vehicle LAN 4, the communication ECU 5, and, for example, four vehicle doors. Part 6 is provided. The communication ECU 5 receives door opening detection information (first detection information) from the OR circuit 61 in the door detection unit 6 and performs multiplex communication processing.

  In the meter drive circuit 1, the microcomputer 11 serving as a control means has an alarm display function. When the microcomputer 11 receives the door opening detection information (first detection information) from the communication ECU 5 via the in-vehicle LAN 4, the microcomputer 11 turns on the transistor 161 (first switch) in the switch means 16 to turn on the first display means 13. The light emitting diode 13a, which is the display element, is turned on. Alternatively, the light emitting diode 13a can be displayed in a blinking manner so that it can be identified by switching the transistor 161 appropriately. Thereby, as shown in FIG. 3, the frame part of the predetermined design (door design) which means that at least one door has opened can be lit or blinked.

  Although not shown in the figure, the microcomputer 11 gives a warning (notification) by selectively lighting or blinking a pointer instrument or a design such as a design as an instrument for a vehicle that displays an analog display of a vehicle speed, an engine speed, or the like. Drives the alarm display panel. The door design is a unique design example in the alarm display panel.

  The constant voltage circuit 12 receives the power supply voltage Vb from the battery 2, generates a stabilization voltage (for example, a constant voltage of 5 v) Vc, and supplies it to the microcomputer 11.

  As the alarm display means, a light emitting diode 13a constituting the first display means 13 for performing the main display (in this case, the frame display) and the second display means 14 for performing the individual display (in this case, the individual door display) are constituted. It consists of light emitting diodes 14a, 14b, 14c, and 14d that form display elements.

  Therefore, the first and second display means 13 and 14 turn on or blink the door design as shown in FIG. 3, so that the light emitting diode 13a displays the frame portion, and the light emitting diodes 14a, 14b, 14c and 14d have four. Display each door of the sheet. Here, the current-limiting resistors 15a, 15b, 15c, 15d, and 15e adjust the currents flowing through the light-emitting diodes 13a, 14a, 14b, 14c, and 14d, and appropriately set the luminance during lighting.

  The switch means 16 includes an NPN transistor 161 (first switch) and a PNP transistor 162 (second switch), and turns on both the transistors 161 and 162 substantially simultaneously by an operation command from the microcomputer 11 to energize the light emitting diode 13a. Is turned on or blinked, and energization of each of the light emitting diodes 14a to 14d is started.

  At this time, ON signals (second detection information) of the door switches 6a, 6b, 6c, and 6d are received from the door detection unit 6 constituting the detection switch, and the corresponding light emitting diodes 14a to 14d are turned on or blinked. 1 and 3, the driver's seat side door switch 6a is turned on, and the light emitting diode 14a is lit or blinked.

  The in-vehicle LAN 4 connects a plurality of control devices such as a brake device or a body device arranged around an instrument panel or a door at different positions in the vehicle, and engine control relations, and transmits various information to each other. Communication and control are performed. A part of the multiplexed signal, for example, a signal related to door opening detection information, vehicle speed, engine speed, engine coolant temperature, etc., is also input to the meter drive circuit 1. The communication ECU 5 is disposed at a different vehicle position from the instrument drive circuit 1, and here transmits door opening detection information as one information in the multiplexed signal.

  When the door detection unit 6 detects the opening of the four vehicle doors and turns ON (second detection information), the door switches 6a to 6d that display and drive the corresponding light emitting diodes 14a to 14d, and these door switches 6a to 6d. When at least one of these is turned on, an OR circuit 61 that outputs door opening detection information (first detection information) to the communication ECU 5 is provided.

  According to the above configuration, the switch unit 16 is disposed in the energization path from the battery 2 to the first and second display units 13 and 14 and is turned on substantially simultaneously when an energization command is received from the microcomputer 11. Thus, the first display means 13 can be energized via the transistor 161 and at the same time the second display means 14 can be energized via the transistor 162. Thus, by using different transistors 161 and 162 for each display means 13 and 14, it becomes possible to ensure the amount of current to each display means 13 and 14 and to switch the energization.

  In particular, the transistor 162 in the switch means 16, the light emitting diodes 14 a to 14 d in the second display means, and the door switches 6 a to 6 d in the detection switch 6 constitute a drive circuit composed of a series circuit. The energization can be performed only when the transistor 162 and the door switches 6a to 6d are simultaneously turned on.

  Therefore, as shown in the timing charts of FIGS. 2A to 2E, the ON signal (second detection information) of the door switch 6a directly wired to the instrument drive circuit 1 is a multiplexed signal (second detection information) from the in-vehicle LAN 4. Even if it is input to the meter drive circuit 1 earlier than the first detection information (FIG. 2A), the switch means 16 is in the OFF state, and neither of the light emitting diodes 13a and 14a is lit up.

  On the other hand, the OR signal of the door detection unit 6 is converted into multiple signals by the communication ECU 5. In the microcomputer 11, the communication processing of the received multiplex signal is finished, and the multiplex processing signal (frame display command) is output (FIG. 2B), and the transistor 161 in the switch means 6 is turned on. Therefore, substantially simultaneously with the start of energization of the light emitting diode 13a in the first display means 13, the transistor 162 is turned on and the energization of the light emitting diode 14a in which the door switch 6a is in the on state can be started (FIG. 2 ( c) to (e)).

  As a result, as shown in FIG. 3, since the switch means 6 operates so as to match the display timing on the delayed side even when the reception timing of both detection information is out, the frame display 13a and the individual door display are set at the same timing. The display operation of the predetermined design can be eliminated, the display variation of the predetermined design can be eliminated, and the appearance of the display of the predetermined design can be improved.

(Second Embodiment)
Next, a display device according to a second embodiment of the present invention will be described with reference to FIG. FIG. 4 is a circuit configuration diagram showing the overall configuration of the vehicle meter.

The difference from the first embodiment shown in FIG. 1 is that the switch means 16 in the first embodiment is composed of transistors 161 and 162 that operate simultaneously. In the second embodiment, the driving IC 161A and the transistor 162 are different. It is configured and a plurality of light emitting diodes 13 a and 13 b are provided in the first display means 13. The driving IC 161A is an IC circuit in which a selection instruction circuit capable of selectively driving a required light emitting diode from a plurality of light emitting diodes 13a and 13b according to a command from the microcomputer 11 and a plurality of transistors are integrated. It is an element.

  As a result, only when the light emitting diode 13a among the plurality of light emitting diodes 13a, 13b in the first display means 13 is selectively displayed, the transistor 162 is turned on substantially simultaneously, and the second display means 14 can be displayed. become. At this point, a current path is formed from the battery 2 to the transistor 162, the light-emitting diode 14, and the door detection unit 6, and the light-emitting diode 14a corresponding to the door switch 6a that is turned on in the door detection unit 6 is energized for lighting. Alternatively, a blinking display operation can be performed.

(Third embodiment)
Next, a display device according to a third embodiment of the present invention will be described with reference to FIG. FIG. 5 is a circuit configuration diagram showing the overall configuration of the vehicle meter.

  The difference from the first embodiment shown in FIG. 1 is that the switch means 16 in the first embodiment is composed of transistors 161 and 162 that operate simultaneously, whereas the first display means 13 is different in the third embodiment. An NPN transistor 161 for driving and an NPN transistor 162A for driving the second display means 14 are provided, the base electrodes of both transistors 161 and 162A are connected in common, and both transistors 161 and 162A are turned on simultaneously according to a command from the microcomputer 11 The door detection unit 6 constituting the detection switch is disposed on the positive electrode side of the battery 2 with respect to the second display means 2.

  Thereby, an energization path is formed by the first display means 13 and the NPN transistor 161 in response to the ON command of the microcomputer 11. On the other hand, at the same time, an energization path is formed from the battery 2 by the door detection unit 6, the second display means 14, and the NPN transistor 162A, and the light emitting diode 14a corresponding to the door switch 6a turned on in the door detection unit 6 Energization can be performed to light up or blink.

(Modification)
Next, a first modification of the present invention will be described with reference to FIG. FIG. 6 is a circuit configuration diagram in which the drive circuit portion of the second display means 14 in the first embodiment or the second embodiment shown in FIG. 1 or 4 is partially modified.

  The difference from the first and second embodiments shown in FIG. 1 or FIG. 4 is that in both embodiments, the door switches 6a to 6d themselves in the door detector 6 are replaced with drive circuits (that is, energization paths) of the light emitting diodes 14a to 14d. In the first modification, PNP transistors 17a to 17d are inserted in series in the drive circuits of the light emitting diodes 14a to 14d, and the door switches 6a to 6d in the door detection unit 6 are configured. Is removed from the drive circuit and used as a control signal source for the PNP transistors 17a to 17d.

  Thereby, it is not necessary to add the door switches 6a to 6d to the series circuit as a drive circuit for the second display means 14, and the current flowing through the door switches 6a to 6d can be reduced.

  A second modification of the present invention will be described with reference to FIG. FIG. 7 is a circuit configuration diagram in which the switch means 16 in the third embodiment shown in FIG. 5 is partially modified.

  A difference from the third embodiment shown in FIG. 5 is that two NPN transistors 161 and 162A are made common to form one NPN transistor 161B, and the first and second display means 13 and 14 are driven by this transistor 161B. It is configured to make it.

  Thereby, although it is necessary to increase the power capacity of the transistor 161B, the number of transistors can be reduced, and the part cost and the part assembling man-hour can be reduced.

  In addition, according to the said embodiment, the door detection part 6 is mentioned as an example as a detection switch, and the door design display is carried out, However, this invention is not limited to a door design display, The predetermined design which needs to display substantially simultaneously Any display target may be used as long as it includes a plurality of display means for sharing and displaying a combination of a display operation using multiple signals and a display operation using direct signals.

It is a circuit block diagram which shows the whole structure of the meter for vehicles used as 1st Embodiment of this invention. It is a timing chart of each signal. It is explanatory drawing which shows the door design example displayed in the meter for vehicles. It is a circuit block diagram which shows the whole structure of the meter for vehicles used as 2nd Embodiment of this invention. It is a circuit block diagram which shows the whole structure of the meter for vehicles used as 3rd Embodiment of this invention. It is a circuit block diagram of the drive circuit part which shows the 1st modification of this invention. It is a circuit block diagram of the drive circuit part which shows the 2nd modification of this invention.

Explanation of symbols

1 Instrument drive circuit 2 Battery (power supply)
4 In-vehicle LAN
5 Communication ECU
6 Door detection part 6a, 6b, 6c, 6d Door switch (detection switch)
11 Microcomputer (control means)
13 First display means 14 Second display means 13a, 14a, 14b, 14c, 14d Light emitting diode 16 Switch means 161 Transistor (first switch)
161A driving IC
161B transistor (third switch)
162, 162A transistor (second switch)

Claims (7)

First and second display means for sharing and displaying a predetermined design;
Control means for receiving a multiplexed signal including first detection information, and for causing the first display means to display based on the first detection information obtained from the multiplexed signal;
A drive circuit that directly receives the second detection information and directly activates the second display means based on the detection information;
Switch means disposed in a power supply path from the power source to the first and second display means, and opens and closes substantially simultaneously upon receiving a command from the control means, and controls the power supply to the first and second display means. A display device comprising:   The switch means includes a first switch that switches an energized state to the first display means, and a second switch that switches the second display means to an energized state when the first switch is switched to the energized state. The display device according to claim 1.   The switch means is commonly connected to the first and second display means, and has a third switch for switching the first and second display means to an energized state upon receiving a command from the control means. The display device according to claim 1. A detection switch that opens and closes according to a detection state and generates the second detection information is provided.
The drive circuit constitutes a series circuit of the detection switch, the second display means, and the switch means, and when the detection switch and the switch means are energized at the same time, the second display means is displayed. The display device according to claim 1, wherein:   The display device according to claim 1, wherein the drive circuit includes a series circuit of a detection switch that opens and closes according to a detection state and generates the second detection information, and the second display unit.   The display device according to claim 2, wherein the first switch includes a part of a driving IC that can selectively drive a plurality of display elements.   The display device according to claim 1, wherein the first display means displays that detection information to be notified has occurred, and the second display means displays individual contents to be notified.

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