JP2004325324A - Display for vehicle - Google Patents

Display for vehicle Download PDF

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Publication number
JP2004325324A
JP2004325324A JP2003121939A JP2003121939A JP2004325324A JP 2004325324 A JP2004325324 A JP 2004325324A JP 2003121939 A JP2003121939 A JP 2003121939A JP 2003121939 A JP2003121939 A JP 2003121939A JP 2004325324 A JP2004325324 A JP 2004325324A
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JP
Japan
Prior art keywords
light source
emitting diode
light emitting
turning
display
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Application number
JP2003121939A
Other languages
Japanese (ja)
Inventor
Takashi Mizutani
隆志 水谷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Denso Corp
Original Assignee
Denso Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Denso Corp filed Critical Denso Corp
Priority to JP2003121939A priority Critical patent/JP2004325324A/en
Publication of JP2004325324A publication Critical patent/JP2004325324A/en
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  • Details Of Measuring Devices (AREA)
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Abstract

<P>PROBLEM TO BE SOLVED: To realize a performance having high grade sense when lighting a light source for an indicator or an alarm lamp on and off. <P>SOLUTION: An MPU (micro processing unit) 1 for controlling electrification of a light emitting diode 32 (light source) changes a duty ratio of a PWM (pulse width modulation) signal to change gradually brightness of the light emitting diode 32, when turning the light emitting diode 32 on and off. The lighting-on and -off can be thereby realized with fade-in and -out characteristics. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、光源を点灯または消灯させて状態の表示を行う車両用表示装置に関するものである。
【0002】
【従来の技術】
従来の車両用表示装置は、例えば前照灯がハイビーム状態のときに光源を点灯させて表示する表示器(インジケータ)や、例えば燃料の残量が閾値以下になったときに光源を点灯させて表示する表示器(警告灯)を備えている。
【0003】
【発明が解決しようとする課題】
しかしながら、上記の従来装置では、表示器の光源の点消灯駆動は単純なON、OFF制御であるため、高級感のある見栄えといった観点では十分とはいえない。
【0004】
本発明は上記点に鑑みて、表示器の光源の点消灯時に高級感のある演出を実現することを目的とする。
【0005】
【課題を解決するための手段】
上記目的を達成するため、請求項1に記載の発明では、光源(32)の点灯または消灯により状態の表示を行う表示器(3)と、光源(32)への通電を制御する制御手段(1)とを備え、制御手段(1)は、光源(32)を点灯させるときおよび光源(32)を消灯させるときのうち少なくとも一方のときに、光源(32)の輝度を徐々に変化させることを特徴とする。
【0006】
これによると、表示器の光源の点灯時または消灯時に高級感のある演出を実現することができる。
【0007】
請求項2に記載の発明では、制御手段(1)は、光源(32)への通電をデューティ制御するとともに、デューティ比を変化させて光源(32)の輝度を変化させることを特徴とする。
【0008】
これによると、電流を制御するよりもデューティ比を制御する方が、回路構成を簡単にすることができるとともに、特に光源としてバルブを用いる場合、デューティ制御の方が輝度をリニアに制御しやすいという利点がある。
【0009】
なお、上記各手段の括弧内の符号は、後述する実施形態に記載の具体的手段との対応関係を示す一例である。
【0010】
【発明の実施の形態】
以下、本発明の一実施形態を図に基づいて説明する。
【0011】
図1は、本発明に係る車両用表示装置の一実施形態を示すシステム構成図である。この車両用表示装置は、図示しない自動車の計器盤に設置される。
【0012】
車両用表示装置は、後述する発光ダイオード32の制御を行うMPU(micro processing unit)1と、MPU1により制御されるトランジスタ2と、トランジスタ2のオンオフによって点灯または消灯される表示器3とを備えている。なお、MPU1は、本発明の制御手段に相当する。
【0013】
表示器3は、図示しない前照灯がハイビーム状態であることを表す図柄の表示マーク31と、通電により点灯(発光)する発光ダイオード32とから構成され、発光ダイオード32が点灯して表示マーク31が照明されることにより、表示マーク31が乗員から視認されるようになっている。なお、発光ダイオード32は、本発明の光源に相当する。
【0014】
MPU1は、図示しないセンサからの入力信号もしくは通信などの手段によって取得した表示器3の点灯、消灯情報を基に、発光ダイオード32の点灯制御を行うもので、本例では、前照灯がハイビーム状態の時にトランジスタ2を制御して発光ダイオード32を点灯させ、これにより表示マーク31を照明して、前照灯がハイビーム状態であることを報知するようになっている。
【0015】
また、MPU1は、トランジスタ2を制御するための信号としてPWM(パルス幅変調)信号を用い、発光ダイオード32を点灯または消灯させる際に、PWM信号のデューティ比を変化させて発光ダイオード32の輝度を徐々に変化させるようになっている。
【0016】
すなわち、図2に示すように、時刻t1において前照灯がハイビームに切り替えられると、時刻t1から所定の時間(例えば、0.5秒)の間に、発光ダイオード32の輝度を0%から100%まで、連続的且つ非リニアに増加させる。また、時刻t2において前照灯がロービームに切り替えられると、時刻t2から所定の時間(例えば、0.5秒)の間に、発光ダイオード32の輝度を100%から0%まで、連続的且つ非リニアに減少させる。これにより、非リニアなフェードイン、フェードアウト特性で点灯消灯制御を実現することができる。
【0017】
(他の実施形態)
なお、上記実施形態では、表示器3としてハイビームインジケータを示したが、他のインジケータや警告灯、具体的には自動変速機のシフト位置を表示するシフト位置インジケータや、燃料の残量が閾値以下になったことを表示する燃料残量警告灯等にも、本発明は適用可能である。
【0018】
また、上記実施形態では、光源として発光ダイオード32を用いたが、光源としてバルブを用いてもよい。
【0019】
また、上記実施形態では、発光ダイオード32を点灯または消灯させる際に、発光ダイオード32の輝度を非リニアに変化させたが、発光ダイオード32の輝度をリニアに変化させてもよい。
【0020】
また、上記実施形態では、発光ダイオード32を点灯させるときおよび消灯させるときのいずれにおいても、発光ダイオード32の輝度を徐々に変化させたが、発光ダイオード32の輝度を徐々に変化させるのは、点灯させるときのみであってもよいし、消灯させるときのみであってもよい。
【図面の簡単な説明】
【図1】本発明に係る車両用表示装置の一実施形態を示すシステム構成図である。
【図2】図1の発光ダイオード32の輝度変化を示す特性図である。
【符号の説明】
1…MPU(制御手段)、3…表示器、32…発光ダイオード(光源)。
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a vehicle display device that displays a state by turning on or off a light source.
[0002]
[Prior art]
Conventional vehicle display devices include, for example, a display (indicator) that turns on and displays a light source when a headlight is in a high beam state, and turns on a light source when, for example, the remaining amount of fuel is below a threshold. An indicator (warning light) for displaying is provided.
[0003]
[Problems to be solved by the invention]
However, in the above-described conventional apparatus, the turning on / off of the light source of the display device is simple ON / OFF control, and therefore, it cannot be said that it is sufficient from the viewpoint of high-quality appearance.
[0004]
In view of the above, it is an object of the present invention to realize a high-quality effect when a light source of a display is turned on and off.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, a display (3) for displaying a state by turning on or off a light source (32), and a control means ( 1) wherein the control means (1) gradually changes the brightness of the light source (32) when at least one of turning on the light source (32) and turning off the light source (32). It is characterized.
[0006]
According to this, when the light source of the display is turned on or off, a high-quality effect can be realized.
[0007]
According to a second aspect of the present invention, the control means (1) performs duty control on energization of the light source (32) and changes the duty ratio to change the luminance of the light source (32).
[0008]
According to this, controlling the duty ratio can simplify the circuit configuration rather than controlling the current, and in particular, when using a bulb as the light source, the duty control can easily control the luminance linearly. There are advantages.
[0009]
It should be noted that reference numerals in parentheses of the above-described units are examples showing the correspondence with specific units described in the embodiments described later.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0011]
FIG. 1 is a system configuration diagram showing one embodiment of a vehicle display device according to the present invention. The vehicle display device is installed on an instrument panel of an automobile (not shown).
[0012]
The vehicular display device includes an MPU (micro processing unit) 1 for controlling a light emitting diode 32 described later, a transistor 2 controlled by the MPU 1, and a display 3 which is turned on or off when the transistor 2 is turned on and off. I have. Note that the MPU 1 corresponds to the control means of the present invention.
[0013]
The display 3 is composed of a display mark 31 having a design indicating that a headlight (not shown) is in a high beam state, and a light emitting diode 32 which is turned on (emits light) when energized. Is illuminated so that the display mark 31 is visually recognized by the occupant. The light emitting diode 32 corresponds to the light source of the present invention.
[0014]
The MPU 1 controls the lighting of the light emitting diode 32 based on the turning on / off information of the display 3 obtained by an input signal from a sensor (not shown) or means such as communication. In this example, the headlight is a high beam. In the state, the transistor 2 is controlled to turn on the light emitting diode 32, thereby illuminating the display mark 31 and notifying that the headlight is in the high beam state.
[0015]
Further, the MPU 1 uses a PWM (pulse width modulation) signal as a signal for controlling the transistor 2 and, when turning on or off the light emitting diode 32, changes the duty ratio of the PWM signal to change the luminance of the light emitting diode 32. It changes gradually.
[0016]
That is, as shown in FIG. 2, when the headlight is switched to the high beam at the time t1, the luminance of the light emitting diode 32 is changed from 0% to 100 for a predetermined time (for example, 0.5 seconds) from the time t1. %, Continuously and non-linearly. When the headlight is switched to the low beam at the time t2, the brightness of the light emitting diode 32 is continuously and non-inverted from 100% to 0% for a predetermined time (for example, 0.5 seconds) from the time t2. Decrease linearly. As a result, it is possible to realize the on / off control with non-linear fade-in and fade-out characteristics.
[0017]
(Other embodiments)
In the above-described embodiment, the high beam indicator is shown as the indicator 3. However, other indicators and warning lights, specifically, a shift position indicator that displays the shift position of the automatic transmission, and a state where the remaining fuel amount is equal to or less than the threshold value The present invention can also be applied to a fuel remaining amount warning light or the like which indicates that the state has been reached.
[0018]
In the above embodiment, the light emitting diode 32 is used as the light source, but a bulb may be used as the light source.
[0019]
Further, in the above embodiment, when the light emitting diode 32 is turned on or off, the brightness of the light emitting diode 32 is changed non-linearly, but the brightness of the light emitting diode 32 may be changed linearly.
[0020]
In the above embodiment, the brightness of the light emitting diode 32 is gradually changed both when the light emitting diode 32 is turned on and when the light emitting diode is turned off. It may be only when turning it off or only when turning off the light.
[Brief description of the drawings]
FIG. 1 is a system configuration diagram showing an embodiment of a vehicle display device according to the present invention.
FIG. 2 is a characteristic diagram showing a luminance change of the light emitting diode 32 of FIG.
[Explanation of symbols]
1 ... MPU (control means), 3 ... display, 32 ... light emitting diode (light source).

Claims (2)

光源(32)の点灯または消灯により状態の表示を行う表示器(3)と、前記光源(32)への通電を制御する制御手段(1)とを備え、前記制御手段(1)は、前記光源(32)を点灯させるときおよび前記光源(32)を消灯させるときのうち少なくとも一方のときに、前記光源(32)の輝度を徐々に変化させることを特徴とする車両用表示装置。An indicator (3) for displaying a state by turning on or off the light source (32), and a control means (1) for controlling energization of the light source (32), wherein the control means (1) A display device for a vehicle, wherein the luminance of the light source (32) is gradually changed when at least one of turning on the light source (32) and turning off the light source (32). 前記制御手段(1)は、前記光源(32)への通電をデューティ制御するとともに、デューティ比を変化させて前記光源(32)の輝度を変化させることを特徴とする請求項1に記載の車両用表示装置。The vehicle according to claim 1, wherein the control means (1) performs duty control on energization of the light source (32), and changes a duty ratio to change luminance of the light source (32). Display device.
JP2003121939A 2003-04-25 2003-04-25 Display for vehicle Withdrawn JP2004325324A (en)

Priority Applications (1)

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008128959A (en) * 2006-11-24 2008-06-05 Denso Corp Display device
JP2010071972A (en) * 2008-09-22 2010-04-02 Acewell Internatl Co Ltd Control circuit of backlight applied to vehicle dashboard panel
JP2010160426A (en) * 2009-01-09 2010-07-22 Denso Corp Head-up display device for vehicle
JP2010254108A (en) * 2009-04-24 2010-11-11 Nippon Seiki Co Ltd Vehicular display device
WO2011077994A1 (en) * 2009-12-23 2011-06-30 日本精機株式会社 Instrument driving device
US8049722B2 (en) 2005-09-05 2011-11-01 Toyota Jidosha Kabushiki Kaisha Vehicular operating apparatus
CN102655705A (en) * 2012-04-24 2012-09-05 东莞市旭田电子有限公司 Frequency-variable breathing lamp and control method thereof as well as main machine peripherals
EP2570303A2 (en) 2011-09-15 2013-03-20 Kabushiki Kaisha Tokai Rika Denki Seisakusho Vehicle indicator illumination circuit and method for controlling vehicle indicator illumination circuit
JP2013064612A (en) * 2011-09-15 2013-04-11 Tokai Rika Co Ltd Display indicator lighting circuit for vehicle
JP2013104822A (en) * 2011-11-15 2013-05-30 Tokai Rika Co Ltd Lighting circuit control device
CN105139778A (en) * 2015-05-18 2015-12-09 闫新 Backlight adjustable light display device
JP2016011856A (en) * 2014-06-27 2016-01-21 カシオ計算機株式会社 Electronic timepiece

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8049722B2 (en) 2005-09-05 2011-11-01 Toyota Jidosha Kabushiki Kaisha Vehicular operating apparatus
JP2008128959A (en) * 2006-11-24 2008-06-05 Denso Corp Display device
JP2010071972A (en) * 2008-09-22 2010-04-02 Acewell Internatl Co Ltd Control circuit of backlight applied to vehicle dashboard panel
JP2010160426A (en) * 2009-01-09 2010-07-22 Denso Corp Head-up display device for vehicle
JP2010254108A (en) * 2009-04-24 2010-11-11 Nippon Seiki Co Ltd Vehicular display device
KR20120106758A (en) 2009-12-23 2012-09-26 닛폰 세이키 가부시키가이샤 Instrument driving device
JP2011133276A (en) * 2009-12-23 2011-07-07 Nippon Seiki Co Ltd Instrument driving device
WO2011077994A1 (en) * 2009-12-23 2011-06-30 日本精機株式会社 Instrument driving device
US8730025B2 (en) 2009-12-23 2014-05-20 Nippon Seiko Co., Ltd. Instrument driving device
EP2570303A2 (en) 2011-09-15 2013-03-20 Kabushiki Kaisha Tokai Rika Denki Seisakusho Vehicle indicator illumination circuit and method for controlling vehicle indicator illumination circuit
JP2013064612A (en) * 2011-09-15 2013-04-11 Tokai Rika Co Ltd Display indicator lighting circuit for vehicle
US9150151B2 (en) 2011-09-15 2015-10-06 Kabushiki Kaisha Tokai Rika Denki Seisakusho Vehicle indicator illumination circuit and method for controlling vehicle indicator illumination circuit
JP2013104822A (en) * 2011-11-15 2013-05-30 Tokai Rika Co Ltd Lighting circuit control device
CN102655705A (en) * 2012-04-24 2012-09-05 东莞市旭田电子有限公司 Frequency-variable breathing lamp and control method thereof as well as main machine peripherals
JP2016011856A (en) * 2014-06-27 2016-01-21 カシオ計算機株式会社 Electronic timepiece
CN105139778A (en) * 2015-05-18 2015-12-09 闫新 Backlight adjustable light display device

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