JP2010210255A - Vehicle instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle instrument which is capable of reducing any influence of electromagnetic noise and includes a circuit board where individual components can be arranged efficiently. <P>SOLUTION: In the vehicle instrument for displaying vehicle information by image display through a liquid crystal display panel 2 connected to the circuit board 1, and by indication display through a pointer 81 which rotates by a drive source 9 mounted on the circuit board 1, the circuit board 1 includes an area 11 for liquid-crystal display provided with a shield case 7 etc., and an area 12 for the pointer display provided with the drive source 9 etc. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicular instrument that displays vehicle information by displaying an image on a liquid crystal display panel connected to a circuit board and indicating a pointer that is rotated by a driving source mounted on the circuit board.

  2. Description of the Related Art Conventionally, as a vehicular instrument, a vehicular instrument is provided with an image display by a liquid crystal display panel connected to a circuit board and an indication display of a pointer that is rotated by a drive source mounted on the circuit board to display vehicle information. For example, it is disclosed in Patent Document 1.

JP 2002-72164 A

  In these vehicular instruments, the wiring is considered in consideration of electromagnetic noise generated from the control means for controlling the liquid crystal display panel or electromagnetic noise affecting the wiring between the liquid crystal display panel and the control means. Measures such as shortening or providing a metal shield are necessary. In this case, there is a problem that the degree of freedom in mounting each electronic component on the circuit board such as securing a wiring path and a mounting space for the shield case is reduced.

  Accordingly, an object of the present invention is to provide a vehicle meter provided with a circuit board that can reduce the influence of electromagnetic noise and can efficiently arrange each component.

  The present invention relates to a vehicle instrument that displays vehicle information by image display by a liquid crystal display panel connected to a circuit board and indication indication of a pointer that is rotated by a driving source mounted on the circuit board. The liquid crystal display panel; a backlight mounted on the circuit board for illuminating the liquid crystal display panel; a connector mounted on the back surface of the backlight mounting surface of the circuit board; and a hole penetrating the circuit board. Flexible wiring for connecting the liquid crystal display panel and the connector via a connector, and a control signal for controlling the liquid crystal display panel and the drive source while being connected to the liquid crystal display panel via the connector A liquid crystal display area provided with a control means for outputting the output, a shield case provided so as to cover the control means, and a front Vehicle meter which is characterized by comprising and a pointer display area formed by providing a driving source for rotating the pointer in response to a control signal from the control means.

  In the present invention, the liquid crystal display area is provided between the plurality of pointer display areas.

  The present invention relates to a vehicle instrument that displays vehicle information by displaying an image on a liquid crystal display panel connected to a circuit board and indicating an indication of a pointer that is rotated by a drive source mounted on the circuit board. It becomes a vehicle meter provided with the circuit board which can arrange | position each component efficiently.

The figure which shows embodiment of this invention in a partial cross section.

  Embodiments to which the present invention is applied will be described below with reference to the accompanying drawings.

  FIG. 1 shows an embodiment to which a vehicle instrument of the present invention is applied. The vehicle instrument comprises a circuit board 1, a liquid crystal display panel 2, a backlight 3, a connector 4, wiring 5, and control means 6. A shield case 7, a pointer indicator 8, and a drive source 9.

  The circuit board 1 can be, for example, a liquid crystal display that can be applied to a conductive material such as a copper foil having a predetermined pattern on a substrate (for example, a glass epoxy substrate) impregnated with an electrically insulating resin. An area 11 and a pointer display area 12 are provided. The liquid crystal display area 11 of the circuit board 1 is an area in which the liquid crystal display panel 2, the backlight 3, the connector 4, the wiring 5, the control means 6, and the shield case 7 are provided. A penetrating hole 13 for passing the wiring 5 connecting the panel 2 and the connector 4 is formed. The pointer display area 12 of the circuit board 1 is an area where the drive source 9 is provided.

  For example, a TFT type liquid crystal display element can be applied to the liquid crystal display panel 2, and vehicle information can be displayed based on a control signal from the control means 6. The liquid crystal display panel 2 is provided so that vehicle information to be displayed can be visually recognized by a vehicle user. In this case, the vehicle travel distance, the temperature outside the vehicle, an alarm message, and the like are displayed.

  A light source such as a light emitting diode can be applied to the backlight 3. The backlight 3 is mounted on the surface of the circuit board 1 so as to face the liquid crystal display panel 2, and can transmit and illuminate the liquid crystal display panel 2. In this case, in order to uniformly illuminate the liquid crystal display panel 2, an optical member 31 such as a lens or a diffusion plate is used between the backlight 3 and the liquid crystal display panel 1. A light emitting diode similar to the backlight 3 is provided on the mounting surface of the backlight 3 on the circuit board 1 in order to illuminate the pointer display unit 8.

  The connector 4 is mounted on the back surface of the mounting surface of the backlight 3 on the circuit board 1 in the vicinity of the hole 13 penetrating the circuit board 1 and connected to the liquid crystal display panel 2 via the wiring 5. It is connected to the control means 6 through one pattern wiring.

  The wiring 5 is a flexible conductive member that connects the liquid crystal display panel 2 and the connector 4 through the hole 13, and for example, a flexible printed wiring board can be applied.

  The control means 6 is connected to the liquid crystal display panel 2 via the connector 4 and outputs a control signal for controlling the liquid crystal display panel 2 and the drive source 9. In this case, the control means 6 includes a microcomputer and a graphic controller for image generation of the liquid crystal display panel 2, and is provided in the vicinity of the connector 4 on the same circuit board 1 surface as the connector 4.

  The shield case 7 is a metal member that covers the control means 6 so that electromagnetic noise emitted from the control means 6 does not affect other electronic components, and is connected to the ground plane of the circuit board 1 by solder. In this case, the shield case 7 covers a relatively thin electronic component including the control means 6 and the connector 4.

  The pointer display unit 8 includes a pointer 81 that is rotated by the driving source 9 and an index such as a scale, a character, and a symbol of a dial plate 82 that is an instruction target of the pointer 81. The vehicle user can read the vehicle information (measured value) such as the vehicle speed by comparing the indicator 81 of the indicator display unit 8 with the index.

  The drive source 9 rotates the pointer 81 to a desired angle based on a control signal from the control means 6, and a stepping motor can be applied.

  With the configuration described above, in the liquid crystal display area 11, the wiring for transmitting the control signal from the control means 6 to the liquid crystal display panel 2 can be shortened through the hole 13, and the drive source 9 which is a relatively large package is provided. The position of the shield case 7 can be determined by avoiding the pointer display area 12 formed as described above. Accordingly, since the shield case 7 is not made larger than necessary, it is possible not only to reduce the influence of electromagnetic noise and efficiently arrange each component, but also to freely mount other components. It is possible to design a circuit board with a high degree.

  In addition, the liquid crystal display area 12 is provided between the plurality of pointer display areas 12, and even in this case, it is possible to reduce the influence of electromagnetic noise and efficiently arrange each component. In addition, the pattern wiring from the control means 6 to each drive source 9 can be designed to be short.

  Although the vehicular instrument of the present invention has been described as an example in the configuration of the above-described embodiment, the present invention is not limited to this, and other configurations depart from the gist of the present invention. It goes without saying that various improvements and design changes can be made without departing from the scope.

  The vehicle instrument according to the present invention can be applied to, for example, a vehicle instrument that displays vehicle information mounted on a moving body such as an automobile or a motorcycle and displays an image.

DESCRIPTION OF SYMBOLS 1 Circuit board 11 Liquid crystal display area 12 Pointer display area 2 Liquid crystal display panel 3 Backlight 4 Connector 5 Wiring 6 Control means 7 Shield case 8 Pointer display part 81 Pointer 82 Dial 9 Drive source

Claims (2)

In a vehicle meter that displays vehicle information by image display by a liquid crystal display panel connected to a circuit board and indication display of a pointer that is rotated by a drive source mounted on the circuit board,
The circuit board is
The liquid crystal display panel;
A backlight mounted on the circuit board and illuminating the liquid crystal display panel;
A connector mounted on the back surface of the backlight mounting surface on the circuit board;
Flexible wiring for connecting the liquid crystal display panel and the connector through a hole penetrating the circuit board;
Control means connected to the liquid crystal display panel via the connector and outputting a control signal for controlling the liquid crystal display panel and the drive source;
A shield case covering the control means;
The liquid crystal display area comprising:
A vehicle meter comprising: a pointer display area provided with a drive source for rotating the pointer in response to a control signal from the control means.   The vehicle instrument according to claim 1, wherein the liquid crystal display area is provided between the plurality of pointer display areas.

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