JP2008157714A - Pointer type display - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pointer type display capable of reducing a design load concerned in illumination tuning, and capable of reducing a cost. <P>SOLUTION: This pointer type display includes the first light source 9 distribution-arranged with the number in response to an amplitude angle of the first pointer 5, and for bringing the first pointer 5 into a luminescent condition, the second light source 10 distribution-arranged with the number smaller than that of the first light source 9 in response to an amplitude angle of the second pointer 6, and for bringing the second pointer 6 into a luminescent condition, the third light source 11 distribution-arranged with the number smaller than that of the second light source 10 in response to an amplitude angle of the third pointer 7, and for bringing the third pointer 7 into a luminescent condition, and resistance elements (regulation means) R1-R6 for regulating current values supplied to the first-third light sources 9-11 to make respective luminescent brightnesses of the first-third pointers 5-7 get near each other. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a pointer-type display device that is incorporated in a moving body such as an automobile, a motorcycle, and a ship and displays different types of measurement information on a plurality of pointer-type display units, and more particularly to improvement of pointer illumination.

  As this kind of pointer type display device, for example, the one described in Patent Document 1 below is known. The pointer-type display device has a plurality of pointer-type display units that display the vehicle speed, the engine speed, the fuel amount, and the water temperature, respectively. These pointer-type display units consist of a pointer that is rotated (running-angle motion) by a driving device such as a stepping motor, and an indicator plate that has an index unit that includes numbers and scales corresponding to the pointer. The deflection angle range of the pointer varies depending on the measurement information (vehicle speed, engine speed, fuel amount, water temperature) that should be performed. In general, the amount of change per unit time such as the vehicle speed and engine speed A pointer with a large pointer type display unit tends to have a wider swing angle range than a pointer with a pointer type display unit having a small amount of change per unit time, such as the fuel amount or water temperature.

  In addition, in these pointer type display units, the pointer and the indicator unit are illuminated by each light source arranged behind the pointer and the indicator plate so that light is emitted. The number of pointers according to the deflection angle range of the pointers is arranged at an interval, and the pointer with a wider deflection angle range displays the fuel amount and water temperature, such as the pointer type display that displays the vehicle speed and engine speed. In general, the number of light sources is larger than that of a pointer having a narrow deflection angle range such as a pointer-type display unit.

By the way, in such a pointer-type display device, the light emission luminance of the pointer provided in each pointer-type display unit is required to be apparently the same, but the number of light sources is set according to the deflection angle range of the pointer. Since it is difficult to make the light emission brightness the same simply by setting, for those that add a graining process to the pointer, change the shape of the pointer, or interpose a light guide member between the pointer and the light source In addition, it is necessary to perform illumination tuning such as adding a texture to the light guide member or changing the shape of the light guide member.
JP 2004-340830 A

  However, since the lighting tuning has been performed by adjusting the structure of the pointer and the light guide member, the design of the pointer and the light guide member requires a lot of time, and the structure of the pointer and the light guide member is complicated. There was a problem that the manufacturing cost was also increased.

  The present invention has been made in view of this point, and a main object thereof is to provide an instrument device that can reduce a design load related to lighting tuning and achieve cost reduction.

  In order to achieve the above object, the present invention is a pointer-type display device that displays different types of measurement information on at least two pointer-type display units, wherein the first measurement information is displayed on the first pointer. A first pointer type display unit, a second pointer type display unit that displays second measurement information with a second pointer having a smaller swing angle than the first pointer, and a swing angle of the first pointer A first light source that is arranged in a number corresponding to the first pointer and emits the first pointer, and a second light source that is arranged in a smaller number than the first light source in accordance with a deflection angle of the second pointer. A second light source that emits light; and an adjustment unit that adjusts a current value of at least one of the first and second light sources so that the light emission luminances of the first and second pointers approach each other. It is characterized by becoming.

  The present invention is also a pointer-type display device that displays different types of measurement information on at least two pointer-type display units, and the first pointer-type display unit displays the first measurement information on the first pointer. And a second pointer type display unit for displaying second measurement information with a second pointer having a smaller swing angle than the first pointer, and an arrangement corresponding to the swing angle of the first pointer. A first light source that emits light from the first pointer, and a second light source that emits the second pointer that is arranged in a smaller number than the first light source according to a deflection angle of the second pointer. And control means for controlling the first and second light sources based on the duty of the PWM signal so that the light emission luminances of the first and second hands approach each other. .

  Further, the invention is characterized in that the adjusting means is a resistor.

  Further, the present invention is characterized in that the first pointer and the second pointer are the same parts having the same size and shape.

  According to the present invention, it is possible to provide a pointer-type display device that can achieve the initial object, reduce the design load related to illumination tuning, and achieve cost reduction.

  1 to 3 show a first embodiment of the present invention. FIG. 1 is a front view of a pointer-type display device according to the present invention, FIG. 2 is a cross-sectional view taken along the line AA in FIG. It is a circuit diagram which shows the drive circuit of the light source for pointers in embodiment.

  1 and 2, the pointer-type display device is composed of, for example, a combination meter that is mounted on an automobile and displays different types of measurement information on a plurality of pointer-type display units, and includes a circuit board 1 and a plurality of driving devices. Devices 2 to 4, a plurality of pointers 5 to 7 corresponding to the respective driving devices 2 to 4, an indicator plate 8, light sources 9 to 11 for pointers for illuminating the pointers 5 to 7, and an indicator plate 8 A light source 12 for the indicator plate to illuminate, a frame body 13 arranged between the indicator plate 8 and the circuit board 1, a turn-back plate 14 arranged on the indicator plate 8, the pointers 5 to 7 and the indicator plate 8 And the like, and a back cover 16 that covers the back side of the circuit board 1.

  The circuit board 1 is made of a hard printed wiring board, and is mounted with a driving circuit (described later) for driving the light sources 9 to 12, wiring patterns for operating the driving devices 2 to 4 and circuit elements.

  For example, a stepping motor can be applied to the driving devices 2 to 4, and the first driving device 2 that constitutes a part of a first pointer-type instrument that will be described later and a part of a second pointer-type instrument that will be described later. It consists of a second driving device 3 and a third driving device 4 that constitutes a part of a third pointer-type meter to be described later. These first to third driving devices 2 to 4 are arranged such that their main body portions are located on the back surface of the circuit board 1 and the respective rotation shafts 21, 31, 41 penetrate the circuit board 1.

  The pointers 5 to 7 are made of a synthetic resin material having translucency, and constitute a first pointer 5 constituting a part of the first pointer-type instrument and a part of the second pointer-type instrument. It consists of a second pointer 6 and a third pointer 7 constituting a part of the third pointer-type meter.

  The first to third pointers 5 to 7 receive the light from the light sources 9 to 11 so as to receive light from the corresponding light sources 9 to 11 for the pointer and emit light linearly, 61, 71, and reflecting portions 52, 62, 72 that reflect the light from the light receiving portions 51, 61, 71 toward the tip side and indicate the respective portions. Further, the rotation center region of the pointers 5 to 7 including the light receiving portions 51, 61, 71 and the reflecting portions 52, 62, 72 is covered with a pointer cover having a light shielding property. In the case of this embodiment, the second pointer 6 and the third pointer 7 are the same parts having the same size and shape, whereas the first pointer 5 includes the second, third pointer 6, The overall size and shape is larger than 7, and therefore the length is longer.

  Of these hands 5-7, the swing angle (maximum rotation angle range) R1 of the first pointer 5 is set to 240 degrees, for example, and the swing angle (maximum rotation angle range) of the second pointer 6 is set. R2 is set to 180 degrees, for example, and the swing angle (maximum rotation angle range) R3 of the third pointer 7 is set to 90 degrees, for example.

  The indicator plate 8 includes a first indicator portion 81 made up of numbers, scales, etc. corresponding to the first pointer 5, a second indicator portion 82 made up of numbers, scales, etc., corresponding to the second hands 6, and The third indicator portion 83 including numbers, scales, and the like corresponding to the three pointers 7 is formed by a single print panel, and each of the indicator portions 81 to 83 includes the first to third pointers 5 to 5. 7 is formed over a range corresponding to each deflection angle R1 to R3.

  As the pointer light sources 9 to 11, for example, light emitting diodes can be applied. The first light source 9 corresponding to the first pointer 5, the second light source 10 corresponding to the second pointer 6, and the third pointer. 7 and a third light source 11 corresponding to 7.

  The first light sources 9 are arranged around the rotation shaft 21 of the first driving device 2 by the number corresponding to the deflection angle R1 of the first pointer 5 (three in this example). Are arranged around the rotation axis 31 of the second driving device 3 by the number corresponding to the deflection angle R2 of the second pointer 6 (two in this example), and the third light source 11 Around the rotation shaft 31 of the driving device 3, the number corresponding to the deflection angle R <b> 3 of the third pointer 7 (one in this example) is arranged.

  For example, a light emitting diode can be applied to the light source 12 for the indicator plate, and a plurality of indicator plates are provided corresponding to the first to third indicator portions 81 to 83.

  The frame body 13 can be made of a synthetic resin material that is positioned between the circuit board 1 and the indicator plate 8 and supports the indicator plate 8 from behind, and a rear area of the indicator plate 8 corresponding to each of the indicator portions 81 to 83. An indicator partition wall that forms an indicator illumination chamber by partitioning and a pointer partition wall that partitions the periphery of each rotating shaft 21 to 41 into a cylindrical shape to form a pointer illumination chamber, which will be described later It is formed for each of the display parts PD1 to PD3, and each of these partition walls has a function such as a guide wall for guiding the light of the light sources 9 to 12 to the illumination target.

  The facing plate 14 can be a synthetic resin member disposed on the indicator plate 8 with an opening through which the pointers 5 to 7 and the indicator portions 81 to 83 can be seen.

  The front cover 15 can be made of a synthetic resin material having translucency through which the pointers 5 to 7, the indicator portions 81 to 83, and the facing plate 14 can be seen through.

  A synthetic resin material that can cover the back side of the circuit board 1 can be applied to the back cover 16.

  The pointer-type display device configured as described above includes the first driving device 2, the first pointer 5, the first indicator portion 81, the first light source 9, and the corresponding indicator light source 12. For example, the first pointer type display unit PD1 that displays the vehicle speed as measurement information is configured, the second driving device 3, the second pointer 6, the second indicator unit 82, the second light source 10, and the like. The second indicator type display unit PD2 that displays, for example, the engine speed as measurement information with the corresponding indicator light source 12 is configured, and the third drive unit 4, the third indicator 7, and the third indicator The unit 83, the third light source 11, and the corresponding indicator light source 12 constitute a third pointer type display unit PD3 that displays, for example, the remaining fuel amount as measurement information.

  Next, a driving circuit for lighting the first to third light sources 9 to 11 for the pointer will be described with reference to FIG.

  In FIG. 3, the drive circuit includes a first drive composed of two second light sources 10 connected in series to each other and first and second resistance elements R1 and R2 connected in parallel to the second light source 10. The circuit 100, the third light source 11 and one first light source 9 connected in series with each other, and the third and fourth resistor elements R3 connected in parallel with the third light source 11 and the first light source 9 The second drive circuit 200 composed of R4, two first light sources 9 connected in series with each other, and fifth and sixth resistance elements R5 and R6 connected in parallel to the first light source 9 The third drive circuit 300 is provided.

  The resistance elements R1 to R6 are made of, for example, chip resistors. In the pointer type display units PD1 to PD3 in which the numbers of the light sources 9 to 11 are different based on the setting of the swing angles R1 to R3 of the pointers 5 to 7, The adjusting means for adjusting the current value supplied to each of the light sources 9 to 11 is configured so that the light emission luminances in the entire rotation range of the pointers 5 to 7 illuminated at .about.11 approach each other. By means, the light emission luminances in the entire rotation ranges of the pointers 5 to 7 in the pointer type display parts PD1 to PD3 are adjusted to be apparently the same.

  For example, each of the resistance elements R1 and R2 is set to have a different resistance value, and adjusted so that the luminous intensity per one of the second light sources 10 is 1250 mcd (milli candela), and each of the resistance elements R3 and R4 is also different. The resistance values are set so that the luminous intensity per one of the third light source 11 and the first light source 9 is 750 mcd, and the resistance elements R5 and R6 are also set to different resistance values, Like the second drive circuit 200, the light intensity of each light source 9 is adjusted to be 750 mcd, and the resistance values of the resistance element R3 and the resistance element R5, and the resistance element R4 and the resistance element R6 are set similarly. As a result, the resistance values (sizes) of the resistance elements R1 to R6 satisfy the relationship of resistance element R1> resistance element R2> resistance elements R3 and R5> resistance elements R4 and R6.

  In this embodiment, when setting the resistance values of the resistance elements R1 to R6, the brightness of the pointer 7 of the third pointer type display portion PD3 having the smallest number of light sources when viewed in units of the pointer type display portions PD1 to D3. With reference to (the luminous intensity of the third light source 11), the brightness of the pointers 5 and 6 of the first and second pointer type display parts PD1 and 2 having a larger number of light sources than the third pointer type display part PD3 (first , The light intensity of the second light sources 9 and 10), the resistance values of the resistance elements R1 to R6 are set.

  For this reason, the brightness of the pointers 5 and 6 of the first and second pointer-type display portions PD1 and PD2 (the luminous intensity of each of the light sources 9 and 10) is bright with a large number of light sources (relative to the third pointer-type display portion PD3). Is adjusted in accordance with the brightness of the pointer 7 of the third pointer-type display PD3 (the luminous intensity of the third light source 7) with a small number of light sources (relative to the first and second pointer-type displays PD1 and PD2). The brightness of the pointers 5 to 7 of the first to third pointer type display portions PD1 to PD3 can be made close to each other over the entire rotation range by the simple operation such as to make them apparently the same.

  As described above, the pointer-type display device according to the present embodiment has the first pointer-type display unit PD1 that displays the first measurement information (vehicle speed) with the first pointer 5 and the swing of the first pointer-type display device PD1. The second pointer type display unit PD2 that displays the second measurement information (engine speed) with the second pointer 6 with a narrow angle, and the third pointer 7 with a smaller swing angle than the second pointer 6 A third pointer type display unit PD3 that displays third measurement information (remaining fuel amount) and a first pointer 5 that is arranged in a number corresponding to the deflection angle of the first pointer 5 and that emits the first pointer 5 The number of the light sources 9, the second light sources 10 that are arranged in a smaller number than the first light sources 9 according to the swing angle of the second pointer 6, and the swing angles of the third pointer 7. And a third light source 11 that is arranged in a smaller number than the second light sources 10 and emits the third pointer 7, and first to third pointers. By providing resistance elements (adjusting means) R1 to R6 for adjusting the current values supplied to the first to third light sources 9 to 11 so that the emission luminances of? It is possible to reduce the design load and reduce the cost. In other words, compared to the conventional method of tuning illumination by adjusting the structure of the pointer and the light guide member, the design time of the pointer and the light guide member can be shortened and the structure of the pointer and the light guide member can be simplified. Manufacturing cost can be reduced.

  In the present embodiment, an example in which the current value is adjusted via the adjusting means (resistive elements R1 to R6) for all the light sources 9 to 11 is shown. Therefore, it is not always necessary to adjust the current values of all the light sources 9 to 11. For example, the third light source 11 is driven without the adjustment means, and the other first and second light sources 9, 10 may be any device that adjusts the current value with respect to the light sources 9 to 11 of at least one of the pointer-type display units PD1 to PD3, such as driving through an adjusting unit.

  Further, in this embodiment, the resistance elements R1 to R6 are connected in parallel in units of the drive circuits 100 to 300, but the number of resistance elements to be connected is arbitrary, and the connection form may be a series connection.

  In this embodiment, the adjustment means is a resistance element (resistor), whereby the circuit configuration can be simplified and the adjustment means can be made inexpensive.

  In the present embodiment, the second pointer 6 and the third pointer 7 are the same parts having the same size and shape, thereby reducing the types of pointers to be designed and simplifying the pointer design process. it can.

  Moreover, in this embodiment, since it is the structure which illuminates the hands 5-7 directly through an air layer, without providing the light guide member and diffusion member for brightness | luminance adjustment between the hands 5-7 and the light sources 9-11. The brightness of the plurality of hands 5 to 7 can be adjusted with a simple structure.

  FIG. 4 is a circuit diagram showing a pointer light source driving circuit according to the second embodiment of the present invention. The basic configuration of the pointer-type display device and the first to third light sources 9 to 11 for pointers are the same as those described above. Although it is the same as 1st Embodiment, in this embodiment, the brightness | luminance of 1st-3rd light sources 9-11 is PWM (Pulse) so that the light emission luminance of 1st-3rd pointers 5-7 may mutually approach. The example which controls based on the duty (Duty) ratio of a Wide Modulation signal is shown.

  That is, each of the two second light sources 10, the third light source 11, the single first light source, and the two first light sources 9 connected in series with each other is connected to the control means 400 formed of, for example, a microcomputer. ing.

  The control means 400 controls the luminous intensity of the first to third light sources 9 to 11 so that the emission luminances of the first to third hands 5 to 7 are apparently the same over the entire rotation range. This embodiment has a storage unit for storing data, and causes the first to third light sources 9 to 11 to emit light at a predetermined luminous intensity by a PWM signal output based on the data recorded in the storage unit. Then, with respect to the first light source 9 and the third light source 11, the duty ratio is set so that the luminous intensity per one of the first light source 9 and the third light source 11 is, for example, 60% of the maximum luminance. On the other hand, for the two second light sources 10, a PWM signal in which the duty ratio is set so that the luminous intensity of each light source 10 becomes, for example, the maximum luminance (100%) is output. It has come to be.

  According to the second embodiment configured as described above, the same effect as that of the first embodiment can be expected. The first and second embodiments can be combined. Four or more pointer type display units may be provided.

The front view of the pointer type display apparatus by the 1st Embodiment of this invention. AA sectional drawing of FIG. The circuit diagram which shows the drive circuit of the light source for pointers in the embodiment. The circuit diagram which shows the drive circuit of the light source for pointer | guidelines in the 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Circuit board 2-4 Drive apparatus 5-7 The 1st-3rd pointer 8 Indicator board 9-11 The 1st-3rd light source (for pointer) 12 The light source for indicator board 13 Frame body 14 Turn-back board 15 Table Cover 16 Back cover 21, 31, 41 Rotating shaft 51, 61, 71 Light receiving part 52, 62, 72 Reflection part R1-R3 Swing angle 81-83 First to third indicator parts PD1-PD3 First to third Pointer type display unit 100 to 200 First to third drive circuits R1 to R6 Resistive element (adjusting means)
400 Control means

Claims (4)

A pointer-type display device that displays different types of measurement information on at least two pointer-type display units,
A first pointer type display unit for displaying first measurement information with a first pointer;
A second pointer-type display unit for displaying second measurement information with a second pointer having a smaller deflection angle than the first pointer;
A first light source arranged in a number corresponding to a deflection angle of the first pointer and emitting the first pointer;
A second light source that is arranged in a smaller number than the first light source and emits light from the second pointer in accordance with a deflection angle of the second pointer;
Adjusting means for adjusting the current value of at least one of the first and second light sources so that the emission luminances of the first and second pointers approach each other;
A pointer-type display device characterized by comprising: A pointer-type display device that displays different types of measurement information on at least two pointer-type display units,
A first pointer type display unit for displaying first measurement information with a first pointer;
A second pointer-type display unit for displaying second measurement information with a second pointer having a smaller deflection angle than the first pointer;
A first light source arranged in a number corresponding to a deflection angle of the first pointer and emitting the first pointer;
A second light source that is arranged in a smaller number than the first light source and emits light from the second pointer in accordance with a deflection angle of the second pointer;
Control means for controlling the first and second light sources based on the duty of the PWM signal so that the emission luminances of the first and second pointers approach each other;
A pointer-type display device characterized by comprising: 2. The pointer type display device according to claim 1, wherein the adjusting means is a resistor. 3. The pointer-type display device according to claim 1, wherein the first pointer and the second pointer are the same parts having the same size and shape.

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