JP7233490B2 - 情報表示装置 - Google Patents
情報表示装置 Download PDFInfo
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- JP7233490B2 JP7233490B2 JP2021129414A JP2021129414A JP7233490B2 JP 7233490 B2 JP7233490 B2 JP 7233490B2 JP 2021129414 A JP2021129414 A JP 2021129414A JP 2021129414 A JP2021129414 A JP 2021129414A JP 7233490 B2 JP7233490 B2 JP 7233490B2
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Description
Rh>Rv
通常、走行している車両が停止するまでに必要な距離(停止距離)は、図4にも示すように、車両の走行速度に比例して変化する。すなわち、時速30km/hで走行中の車両は、空走距離と制動距離を合わせた14mの停止距離が必要であり、時速70km/hでは52m、さらに、時速100km/hでは93mもの停止距離が必要となる。
図5は、本発明の一実施形態であるHUD装置1の周辺機器構成を示すブロックと概略構成図であり、ここでは、その一例として、特に、自動車のフロントガラスに画像を投影するHUD装置について説明する。
続いて、上述した情報表示装置により生成された虚像のHUD画像表示領域における表示位置(範囲)について、特に、アラート表示を例にして、以下に詳細に説明する。
さらに、発明者らは車速に応じてドライバーの視点移動がどのように変化するかを調査した。一般道を平均速度50~60km/hで1分~3分間走行した場合の視点移動を水平方向と垂直方向に分離して図8に示す。図8(a)は昼間に走行した場合の視点移動の範囲を示し、図8(b)は(a)で示したデータを取得した同一区間を夜間に走行した場合の運転者の視点移動を示している。
続いて、上述した情報表示装置の容積と図2に示した大型化するHUDの画像表示領域(エリア)との関係について図10を参照して説明する。すなわち、情報表示装置の容積は、HUD画像表示領域(エリア)の視野角(横(H)、縦(V))の増大に伴って増加している。具体的には、(視野角[10×7]、虚像距離(20m)では、凹面ミラーを含む光学系の大型化によってHUDのセット容積が18Lを越えてしまい、当該装置の搭載場所であるフロントガラスとステアリングとの間の空間内に収納することが出来ないという問題が指摘される。そこで、以下では、HUD画像表示領域(エリア)の視野角の増大に伴う装置容量の増大を解決するための情報表示装置の構造について述べる。
Claims (12)
- 乗り物に映像情報を表示する情報表示装置であって、
前記映像情報を虚像として表示するHUD装置と、
前記乗り物の運転者の視点位置を検知する運転者視点位置検出部と、を備え、
前記運転者視点位置検出部により検出された前記乗り物を運転する運転者の視点位置、および/または前記HUD装置にて取得された前記乗り物の情報に基づいて、前記虚像の表示位置を変化させ、
前記HUD装置は、前記乗り物のフロントガラス上で形成する画像表示領域において、前記乗り物の情報に基づいて前記画像表示領域の横方向における視野角を変化させ、前記画像表示領域の縦方向における視野角については前記乗り物の情報に関わらず変化させないように構成されている、
情報表示装置。 - 請求項1に記載の情報表示装置であって、
前記乗り物の情報の一つとしては、前記乗り物の走行速度がある、
情報表示装置。 - 請求項2に記載の情報表示装置であって、
前記走行速度に応じて前記運転者の視点位置の移動の範囲とその中心が変化する、
情報表示装置。 - 請求項1に記載の情報表示装置であって、
前記映像情報の一つとしては、アラート情報があり、
前記アラート情報を前記運転者の視点移動に応じて表示する、
情報表示装置。 - 請求項4に記載の情報表示装置であって、
前記アラート情報は、前記乗り物の前方の歩行者、および/または、先行する乗り物の存在を警告するための情報である、
情報表示装置。 - 請求項2に記載の情報表示装置であって、
前記映像情報は、前記走行速度に応じた前記乗り物の空走距離と制動距離を合わせた停止距離より遠方に表示される、
情報表示装置。 - 請求項2に記載の情報表示装置であって、
前記映像情報は、前記走行速度に応じた前記乗り物の空走距離と制動距離を合わせた停止距離の位置に表示される、
情報表示装置。 - 請求項1に記載の情報表示装置であって、
外光によって前記乗り物が昼間の走行であるか夜間の走行であるかを検知する昼間走行/夜間走行検知手段を有し、
前記虚像の表示位置を、前記昼間走行/夜間走行検知手段による検知結果に対応して設定する、
情報表示装置。 - 請求項1に記載の情報表示装置において、
前記HUD装置は映像表示装置と、
前記映像表示装置から出射された光を反射して前記乗り物のフロントガラスへ向けて投射する凹面ミラーを備えている、
情報表示装置。 - 請求項9に記載の情報表示装置において、
前記凹面ミラーは、回転機構を備えている、
情報表示装置。 - 請求項1に記載の情報表示装置において、
前記HUD装置は、前記乗り物のフロントガラス上で形成する画像表示領域において、前記乗り物の走行速度に対応して前記映像情報の表示位置が変化するように構成されている、
情報表示装置。 - 請求項11に記載の情報表示装置において、
高速走行時の前記画像表示領域における表示位置は、低速走行時の前記画像表示領域における表示位置より高い、
情報表示装置。
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