JPWO2020158401A1 - 受光装置および測距システム - Google Patents
受光装置および測距システム Download PDFInfo
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Abstract
Description
1.測距システムの構成例
2.受光装置の構成例
3.画素回路の構成例
4.光源と画素アレイの平面図
5.画素断面図
6.比較例
7.画素のその他の配列例
8.測距システムの使用例
9.移動体への応用例
図1は、本技術を適用した測距システムの一実施の形態の構成例を示すブロック図である。
図2は、受光装置52の構成例を示すブロック図である。
図3は、画素アレイ72に行列状に複数配置された画素81の回路構成例を示している。
図5のAは、光源32の平面図を示している。
図6のAは、測定用の画素81Mの断面図を示している。
図7は、測距システム11の光源32と画素アレイ72の構造と比較する比較例としての他の測距システムにおける光源と画素アレイの構成例を示している。
図8は、画素アレイ72における画素のその他の配列例を示す断面図である。
本技術は、測距システムへの適用に限られるものではない。即ち、本技術は、例えば、スマートフォン、タブレット型端末、携帯電話機、パーソナルコンピュータ、ゲーム機、テレビ受像機、ウェアラブル端末、デジタルスチルカメラ、デジタルビデオカメラなどの電子機器全般に対して適用可能である。上述の撮像部41は、レンズ51及び受光装置52がまとめてパッケージングされたモジュール状の形態であってもよいし、レンズ51と受光装置52とが別に構成され、受光装置52のみをワンチップとして構成してもよい。
・自動停止等の安全運転や、運転者の状態の認識等のために、自動車の前方や後方、周囲、車内等を撮影する車載用センサ、走行車両や道路を監視する監視カメラ、車両間等の測距を行う測距センサ等の、交通の用に供される装置
・ユーザのジェスチャを撮影して、そのジェスチャに従った機器操作を行うために、TVや、冷蔵庫、エアーコンディショナ等の家電に供される装置
・内視鏡や、赤外光の受光による血管撮影を行う装置等の、医療やヘルスケアの用に供される装置
・防犯用途の監視カメラや、人物認証用途のカメラ等の、セキュリティの用に供される装置
・肌を撮影する肌測定器や、頭皮を撮影するマイクロスコープ等の、美容の用に供される装置
・スポーツ用途等向けのアクションカメラやウェアラブルカメラ等の、スポーツの用に供される装置
・畑や作物の状態を監視するためのカメラ等の、農業の用に供される装置
本開示に係る技術(本技術)は、様々な製品へ応用することができる。例えば、本開示に係る技術は、自動車、電気自動車、ハイブリッド電気自動車、自動二輪車、自転車、パーソナルモビリティ、飛行機、ドローン、船舶、ロボット等のいずれかの種類の移動体に搭載される装置として実現されてもよい。
(1)
受光面を有する受光素子と、
前記受光素子に対して、前記受光面とは反対側に設けられる発光源と
を有する複数の画素を備え、
前記複数の画素は、
前記受光素子と前記発光源との間に設けられた遮光部材を有する第1の画素と、
前記受光素子と前記発光源との間に、光子を伝搬させる導光部を有する第2の画素と
を備える
受光装置。
(2)
前記第2の画素は、前記受光素子の受光面を覆う遮光部材をさらに備える
前記(1)に記載の受光装置。
(3)
前記第2の画素の前記発光源は、前記第1の画素の前記受光素子が受光する反射光が照射される照射タイミングと同じタイミングで発光される
前記(1)または(2)に記載の受光装置。
(4)
第1の基板と第2の基板とを含む2枚以上の貼り合わせで構成され、
前記受光素子は、前記第1の基板に形成され、
前記発光源は、前記第2の基板に形成されている
前記(1)乃至(3)のいずれかに記載の受光装置。
(5)
前記第2の基板の画素領域内の回路は、前記第1の画素と前記第2の画素とで異なる
前記(4)に記載の受光装置。
(6)
前記第1の画素と前記第2の画素とで異なる回路は、前記第2の画素に形成された前記発光源を制御する回路である
前記(5)に記載の受光装置。
(7)
前記第2の基板の画素領域内の回路は、前記第1の画素と前記第2の画素とで同一である
前記(4)に記載の受光装置。
(8)
前記受光素子は、SPADである
前記(1)乃至(7)のいずれかに記載の受光装置。
(9)
前記画素の信号は、測距、距離データの補正、または、前記SPADの印加電圧の適正確認のいずれかに用いられる
前記(8)に記載の受光装置。
(10)
前記SPADの印加電圧の適正確認では、前記第2の画素の前記SPADへの印加電圧が計測される
前記(9)に記載の受光装置。
(11)
計測された前記SPADの印加電圧を基に、前記SPADのアノード電圧が制御される
前記(10)に記載の受光装置。
(12)
平面方向において前記第1の画素と前記第2の画素の間に、測距に使用されない第3の画素をさらに備える
前記(1)乃至(11)のいずれかに記載の受光装置。
(13)
前記第3の画素は、駆動されない画素である
前記(12)に記載の受光装置。
(14)
前記第3の画素は、内部電圧モニタ用として駆動される画素である
前記(12)に記載の受光装置。
(15)
前記第1の画素がN1xN2(N1,N2は1以上の整数)で配列されている
前記(1)乃至(14)のいずれかに記載の受光装置。
(16)
前記第2の画素がM1xM2(M1,M2は1以上の整数)で配列されている
前記(1)乃至(15)のいずれかに記載の受光装置。
(17)
前記発光源は、トランジスタ、ダイオード、または抵抗素子のいずれかで構成される
前記(1)乃至(16)のいずれかに記載の受光装置。
(18)
照射光を照射する照明装置と、
前記照射光に対する反射光を受光する受光装置と
を備え、
前記受光装置は、
受光面を有する受光素子と、
前記受光素子に対して、前記受光面とは反対側に設けられる発光源と
を有する複数の画素を備え、
前記複数の画素は、
前記受光素子と前記発光源との間に設けられた遮光部材を有する第1の画素と、
前記受光素子と前記発光源との間に、光子を伝搬させる導光部を有する第2の画素と
を備える
測距システム。
Claims (18)
- 受光面を有する受光素子と、
前記受光素子に対して、前記受光面とは反対側に設けられる発光源と
を有する複数の画素を備え、
前記複数の画素は、
前記受光素子と前記発光源との間に設けられた遮光部材を有する第1の画素と、
前記受光素子と前記発光源との間に、光子を伝搬させる導光部を有する第2の画素と
を備える
受光装置。 - 前記第2の画素は、前記受光素子の受光面を覆う遮光部材をさらに備える
請求項1に記載の受光装置。 - 前記第2の画素の前記発光源は、前記第1の画素の前記受光素子が受光する反射光が照射される照射タイミングと同じタイミングで発光される
請求項1に記載の受光装置。 - 第1の基板と第2の基板とを含む2枚以上の貼り合わせで構成され、
前記受光素子は、前記第1の基板に形成され、
前記発光源は、前記第2の基板に形成されている
請求項1に記載の受光装置。 - 前記第2の基板の画素領域内の回路は、前記第1の画素と前記第2の画素とで異なる
請求項4に記載の受光装置。 - 前記第1の画素と前記第2の画素とで異なる回路は、前記第2の画素に形成された前記発光源を制御する回路である
請求項5に記載の受光装置。 - 前記第2の基板の画素領域内の回路は、前記第1の画素と前記第2の画素とで同一である
請求項4に記載の受光装置。 - 前記受光素子は、SPADである
請求項1に記載の受光装置。 - 前記画素の信号は、測距、距離データの補正、または、前記SPADの印加電圧の適正確認のいずれかに用いられる
請求項8に記載の受光装置。 - 前記SPADの印加電圧の適正確認では、前記第2の画素の前記SPADへの印加電圧が計測される
請求項9に記載の受光装置。 - 計測された前記SPADの印加電圧を基に、前記SPADのアノード電圧が制御される
請求項10に記載の受光装置。 - 平面方向において前記第1の画素と前記第2の画素の間に、測距に使用されない第3の画素をさらに備える
請求項1に記載の受光装置。 - 前記第3の画素は、駆動されない画素である
請求項12に記載の受光装置。 - 前記第3の画素は、内部電圧モニタ用として駆動される画素である
請求項12に記載の受光装置。 - 前記第1の画素がN1xN2(N1,N2は1以上の整数)で配列されている
請求項1に記載の受光装置。 - 前記第2の画素がM1xM2(M1,M2は1以上の整数)で配列されている
請求項1に記載の受光装置。 - 前記発光源は、トランジスタ、ダイオード、または抵抗素子のいずれかで構成される
請求項1に記載の受光装置。 - 照射光を照射する照明装置と、
前記照射光に対する反射光を受光する受光装置と
を備え、
前記受光装置は、
受光面を有する受光素子と、
前記受光素子に対して、前記受光面とは反対側に設けられる発光源と
を有する複数の画素を備え、
前記複数の画素は、
前記受光素子と前記発光源との間に設けられた遮光部材を有する第1の画素と、
前記受光素子と前記発光源との間に、光子を伝搬させる導光部を有する第2の画素と
を備える
測距システム。
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