JP2020032825A - Vehicle display device - Google Patents

Vehicle display device Download PDF

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JP2020032825A
JP2020032825A JP2018159854A JP2018159854A JP2020032825A JP 2020032825 A JP2020032825 A JP 2020032825A JP 2018159854 A JP2018159854 A JP 2018159854A JP 2018159854 A JP2018159854 A JP 2018159854A JP 2020032825 A JP2020032825 A JP 2020032825A
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polarizing member
viewer
display
liquid crystal
infrared light
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彰大 後藤
Akihiro Goto
彰大 後藤
青野　賢司
Kenji Aono
賢司 青野
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Nippon Seiki Co Ltd
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Nippon Seiki Co Ltd
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Priority to JP2018159854A priority Critical patent/JP2020032825A/en
Priority to PCT/JP2019/033224 priority patent/WO2020045329A1/en
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Abstract

To provide a vehicle display device which can excellently detect the state of a viewer.SOLUTION: A vehicle display device includes: a display panel 10 which has a display region R1 for displaying vehicle information and a non-display region R2 being a region other than the display region R1; imaging means 61 which images the state of a viewer who can visually recognize the display panel 10; and an infrared ray irradiation unit 62 which emits the infrared light toward the viewer. The imaging means 61 is arranged so as to correspond to the non-display region R2 on the back side of the display panel 10. The infrared light emitted from the infrared ray irradiation unit 62 is configured to be emitted toward the viewer side through the non-display region R2 and such that the infrared light irradiating the viewer is reflected to be incident on the imaging means 61 through the non-display region R2.SELECTED DRAWING: Figure 3

Description

本発明は、例えば自動車や自動２輪車等の車両に搭載される車両用表示装置に関するものである。   The present invention relates to a vehicle display device mounted on a vehicle such as an automobile or a motorcycle.

従来より、この種の車両用表示装置にあっては、例えば下記特許文献１に記載されているものが知られている。この特許文献１に記載の車両用表示装置は、車両の運転席前方に搭載された車両用計器であり、車両の走行速度等をはじめとする各種車両情報を表示する液晶表示パネル（表示手段）と、表示装置の外装ケースを構成する樹脂製の筐体とから主に構成される。   2. Description of the Related Art Conventionally, as this type of vehicle display device, for example, one described in Patent Document 1 below is known. The vehicle display device described in Patent Document 1 is a vehicle instrument mounted in front of a driver's seat of a vehicle, and a liquid crystal display panel (display means) for displaying various vehicle information such as a running speed of the vehicle. And a resin housing constituting an outer case of the display device.

特開２０１８−５４２９１号公報JP 2018-54291 A

近年、車両の運転席に着座するとともに前記液晶表示パネルを視認する運転者（視認者）の顔を撮像するとともに、運転者の顔の動作等から運転者の状態（挙動）を検知するカメラモジュールを前記車両用計器に搭載するという技術の実用化が注目されつつある。ところで、特許文献１に記載の車両用表示装置にあっては、運転者の状態を検出すべく、カメラモジュールを車両用表示装置に搭載するような構成は想定されていないため、この点で更なる改良の余地があった。
そこで本発明は、前述の課題に対して対処するため、視認者の状態を検出することが可能な車両用表示装置の提供を目的とするものである。 2. Description of the Related Art In recent years, a camera module that sits on a driver's seat of a vehicle, captures an image of a driver (viewer) who visually recognizes the liquid crystal display panel, and detects a state (behavior) of the driver from the operation of the driver's face and the like. Attention has been focused on the practical application of the technology of mounting the above-mentioned on the vehicle instrument. By the way, the vehicle display device described in Patent Document 1 does not assume a configuration in which a camera module is mounted on the vehicle display device in order to detect the state of the driver. There was room for improvement.
Accordingly, an object of the present invention is to provide a vehicular display device capable of detecting a state of a viewer in order to address the above-described problem.

本発明は、車両情報を表示する表示領域と前記表示領域以外の領域となる非表示領域とを有する表示手段と、前記表示手段を視認可能な視認者の状態を撮像する撮像手段と、前記視認者に向けて赤外光を照射する赤外線照射部とを備え、前記撮像手段は、前記表示手段の前記視認者側とは反対側となる反視認者側において、前記非表示領域に対応するように配置され、前記赤外線照射部から照射される前記赤外光は前記非表示領域を介するかもしくは前記非表示領域を介さずに前記視認者側に向けて照射されるとともに、前記視認者を照射した前記赤外光が反射して前記非表示領域を経て前記撮像手段に入射される構成としたことを特徴とする。   The present invention provides a display unit having a display area for displaying vehicle information and a non-display area serving as an area other than the display area; an imaging unit for imaging a state of a viewer who can visually recognize the display means; An infrared irradiating unit that irradiates infrared light toward a user, wherein the imaging unit corresponds to the non-display area on a side of the display unit opposite to the viewer side opposite to the viewer side. And the infrared light emitted from the infrared irradiating unit is irradiated toward the viewer via the non-display area or without passing through the non-display area, and irradiates the viewer. The infrared light is reflected and is incident on the imaging means via the non-display area.

また本発明は、前記表示手段は、一対の絶縁基板間に液晶を封入した液晶セルと、前記視認者側となる前記液晶セルの前側に設けられた前側偏光部材と、前記反視認者側となる前記液晶セルの後側に設けられた後側偏光部材とを備えた液晶表示パネルであり、前記前側偏光部材は、前記前側偏光部材が部分的に除去された第１の偏光部材除去部を備え、前記後側偏光部材は、前記後側偏光部材が部分的に除去された第２の偏光部材除去部を備え、前記第１、第２の偏光部材除去部は、前記液晶表示パネルの厚み方向にて重なり合うように設けられ、前記第１、第２の偏光部材除去部に対応する前記液晶セル部分が前記非表示領域を構成していることを特徴とする。   Further, according to the present invention, the display means includes a liquid crystal cell in which liquid crystal is sealed between a pair of insulating substrates, a front polarizing member provided on a front side of the liquid crystal cell to be the viewer side, and the opposite viewer side. And a rear polarizing member provided on the rear side of the liquid crystal cell, wherein the front polarizing member includes a first polarizing member removing portion in which the front polarizing member is partially removed. Wherein the rear polarizing member includes a second polarizing member removing portion in which the rear polarizing member is partially removed, and the first and second polarizing member removing portions include a thickness of the liquid crystal display panel. Wherein the liquid crystal cell portions corresponding to the first and second polarizing member removing portions constitute the non-display region.

また本発明は、前記第１の偏光部材除去部または前記第２の偏光部材除去部に前記赤外光を透過可能な赤外光透過部を設けたことを特徴とする。   Further, the present invention is characterized in that an infrared light transmitting portion capable of transmitting the infrared light is provided in the first polarizing member removing portion or the second polarizing member removing portion.

本発明によれば、所期の目的を達成でき、視認者の状態を良好に検出することが可能な車両用表示装置を提供できる。   Advantageous Effects of Invention According to the present invention, it is possible to provide a vehicle display device that can achieve an intended purpose and can detect a state of a viewer satisfactorily.

本発明の実施形態による車両用表示装置の正面図。1 is a front view of a vehicle display device according to an embodiment of the present invention. 図１のＡ−Ａ断面図。AA sectional drawing of FIG. 図１のＢ−Ｂ断面図。BB sectional drawing of FIG. 同実施形態による車両用表示装置の電気的構成を示すブロック図。FIG. 2 is a block diagram showing an electrical configuration of the vehicle display device according to the embodiment. 同実施形態の変形例による車両用表示装置の正面図。The front view of the display for vehicles by the modification of the embodiment. 図５のＣ−Ｃ断面図。6. CC sectional drawing of FIG.

以下、図１〜図４に基づいて、本発明の車両用表示装置を自動車の運転席前方に搭載される車両用計器に適用した場合を例に挙げて説明する。なお、以下の説明では、車両用計器を正視（視認）する視認者側を前方側（前側）とし、当該視認者側とは反対側である反視認者側を背後側（後側）とする。   Hereinafter, a case where the vehicle display device of the present invention is applied to a vehicle instrument mounted in front of the driver's seat of an automobile will be described with reference to FIGS. In the following description, the viewer side who looks at the instrument for the vehicle (visually) is the front side (front side), and the anti-viewer side opposite to the viewer side is the back side (rear side). .

図１、図２において、本実施形態による車両用表示装置としての車両用計器Ｄは、車速情報等の各種の車両情報（所定情報）を表示する表示領域Ｒ１と当該表示領域Ｒ１以外の領域となる非表示領域Ｒ２とを有する表示パネル（表示手段）１０と、この表示パネル１０に照明光を供給する光源２０と、この光源２０が実装された回路基板３０と、光源２０から表示パネル１０へと至る照明経路中に配置される導光部材４０と、表示パネル１０の前方側を覆う保護部材５０と、車両の運転席に着座する運転者（以下、視認者とも言う）を監視するカメラモジュール６０と、表示パネル１０と光源２０と回路基板３０と導光部材４０とカメラモジュール６０とを収容する筐体７０とから主に構成されている。   1 and 2, a vehicle instrument D as a vehicle display device according to the present embodiment includes a display area R1 for displaying various vehicle information (predetermined information) such as vehicle speed information and an area other than the display area R1. Panel (display means) 10 having a non-display area R2, a light source 20 for supplying illumination light to the display panel 10, a circuit board 30 on which the light source 20 is mounted, and a light source 20 to the display panel 10. A light guide member 40 disposed in an illumination path leading to the display panel 10, a protection member 50 covering the front side of the display panel 10, and a camera module for monitoring a driver (hereinafter, also referred to as a viewer) sitting in a driver's seat of the vehicle. It mainly includes a display panel 10, a light source 20, a circuit board 30, a light guide member 40, and a housing 70 that houses the camera module 60.

表示パネル１０は、一対の絶縁基板（ガラス基板）間に液晶を封入した液晶セル１１と、前方側となる液晶セル１１の前側に設けられた前側偏光部材１２と、背後側となる液晶セル１１の後側に設けられた後側偏光部材１３とを備えたＴＦＴ（薄膜トランジスタ）型の液晶表示パネルである。   The display panel 10 includes a liquid crystal cell 11 in which liquid crystal is sealed between a pair of insulating substrates (glass substrates), a front polarizing member 12 provided in front of the liquid crystal cell 11 on the front side, and a liquid crystal cell 11 on the back side. This is a TFT (thin film transistor) type liquid crystal display panel including a rear polarizing member 13 provided on the rear side.

前側偏光部材１２は、図３中、表示パネル１０の下側中央部分に対応する箇所を除いた液晶セル１１の前側に貼り付けられた前側偏光板である。これにより、前側偏光部材１２は、表示パネル１０の前記下側中央部分にて、前側偏光部材１２が部分的に除去された第１の偏光部材除去部１２ａを備えることになる。   The front-side polarizing member 12 is a front-side polarizing plate attached to the front side of the liquid crystal cell 11 except for a portion corresponding to a lower central portion of the display panel 10 in FIG. Thereby, the front polarizing member 12 includes the first polarizing member removing portion 12a in which the front polarizing member 12 is partially removed at the lower central portion of the display panel 10.

後側偏光部材１３は、表示パネル１０の前記下側中央部分に対応する箇所を除いた液晶セル１１の後側に貼り付けられた後側偏光板である。これにより、後側偏光部材１３は、表示パネル１０の前記下側中央部分にて、後側偏光部材１３が部分的に除去された第２の偏光部材除去部１３ａを備えることになる。   The rear polarizing member 13 is a rear polarizing plate attached to the rear side of the liquid crystal cell 11 except for a portion corresponding to the lower central portion of the display panel 10. Thereby, the rear polarizing member 13 includes the second polarizing member removing portion 13a in which the rear polarizing member 13 is partially removed at the lower central portion of the display panel 10.

ここで、第１の偏光部材除去部１２ａと第２の偏光部材除去部１３ａとの位置関係に着目すると、第１、第２の偏光部材除去部１２ａ、１３ａの形成領域は概ね等しく、また前方側から表示パネル１０を見たときに、第１の偏光部材除去部１２ａと第２の偏光部材除去部１３ａとは、表示パネル１０（前記液晶表示パネル）の厚み方向Ｙにて重なり合うように設けられる。   Here, focusing on the positional relationship between the first polarizing member removing portion 12a and the second polarizing member removing portion 13a, the formation regions of the first and second polarizing member removing portions 12a and 13a are substantially equal, and When viewing the display panel 10 from the side, the first polarizing member removing portion 12a and the second polarizing member removing portion 13a are provided so as to overlap in the thickness direction Y of the display panel 10 (the liquid crystal display panel). Can be

そして、本実施形態では、前方側から見て両偏光部材１２、１３が重なり合っている部分は、前記車両情報を表示する表示領域Ｒ１として構成される。例えば図１では、前記車両情報の一例として車両の走行速度を示す車速表示部１４が表示領域Ｒ１に表示された例を示している。一方で、前方側から見て両偏光部材１２、１３が重なり合っていない部分（すなわち第１、第２の偏光部材除去部１２ａ、１３ａに対応する液晶セル１１部分）は、情報が何も表示されない非表示領域Ｒ２を構成している。   In the present embodiment, a portion where the two polarizing members 12 and 13 overlap with each other when viewed from the front side is configured as a display region R1 for displaying the vehicle information. For example, FIG. 1 illustrates an example in which a vehicle speed display unit 14 that indicates a traveling speed of a vehicle is displayed in a display region R1 as an example of the vehicle information. On the other hand, when viewed from the front side, no information is displayed in a portion where the two polarizing members 12 and 13 do not overlap (that is, in the liquid crystal cell 11 corresponding to the first and second polarizing member removing portions 12a and 13a). This constitutes a non-display area R2.

なお、第２の偏光部材除去部１３ａには、後述する赤外光を透過可能な赤外光透過部１５を設けてある。赤外光透過部１５は、可視光を反射または吸収する機能を有し、第２の偏光部材除去部１３ａを完全に埋めるように赤外線透過インク等によって液晶セル１１の背面側に印刷形成されている。赤外光透過部１５は、赤外線透過インクを印刷することに代えて、赤外線透過フィルムを適用することも可能である。   Note that the second polarizing member removing unit 13a is provided with an infrared light transmitting unit 15 that can transmit infrared light, which will be described later. The infrared light transmitting section 15 has a function of reflecting or absorbing visible light, and is formed by printing on the back side of the liquid crystal cell 11 with infrared transmitting ink or the like so as to completely fill the second polarizing member removing section 13a. I have. The infrared light transmitting section 15 can use an infrared transmitting film instead of printing the infrared transmitting ink.

光源２０は、適宜色の光を発するチップ型発光ダイオードを適用することができ、導光部材４０の後述する第１、第２の光導入部の真下となる回路基板３０上に複数個実装される。なお、光源２０の個数は、前記第１、第２の光導入部の形状（大きさ）に対応させて必要な個数だけ設ければよい。   As the light source 20, a chip-type light emitting diode that emits light of an appropriate color can be applied, and a plurality of light sources are mounted on a circuit board 30 directly below first and second light introducing portions of the light guide member 40, which will be described later. You. The number of the light sources 20 may be set to a required number corresponding to the shapes (sizes) of the first and second light introducing portions.

回路基板３０は、例えばガラスエポキシ系基材に配線パターンが施された硬質配線板であり、表示パネル１０の表示制御や光源２０の点灯制御を行うとともに、カメラモジュール６０（後述する撮像手段や赤外線照射部）の動作を制御するマイクロコンピュータとしての制御部３１と、光源２０と、抵抗、コンデンサ等の回路部品とが前記配線パターンに導通接続されている。なお、回路基板３０は、フレキシブル配線板（図示せず）を用いて表示パネル１０と電気的に接続されている。   The circuit board 30 is, for example, a hard wiring board in which a wiring pattern is formed on a glass-epoxy base material. A control unit 31 as a microcomputer for controlling the operation of the irradiation unit), the light source 20, and circuit components such as resistors and capacitors are electrically connected to the wiring pattern. The circuit board 30 is electrically connected to the display panel 10 using a flexible wiring board (not shown).

導光部材４０は、透光性合成樹脂材料にて形成され、表示パネル１０の背後に沿うように配置される導光本体部４１と、各光源２０と対向するように導光本体部４１に一体形成され、各光源２０からの照明光を導入可能に設けられる一対の第１、第２の光導入部４２、４３とを備えている。   The light guide member 40 is formed of a light-transmitting synthetic resin material, and is provided on the light guide body 41 that is arranged along the back of the display panel 10 and on the light guide body 41 that faces each light source 20. It has a pair of first and second light introducing portions 42 and 43 that are integrally formed and provided so as to be able to introduce illumination light from each light source 20.

導光本体部４１は、導光本体部４１の主要部を構成する略平板状の導光部４１ａと、表示パネル１０の前記下側中央部分（つまり第２の偏光部材除去部１３ａ）に対応して設けられる空間部４１ｂとを備える（図３参照）。この場合、空間部４１ｂは、導光部４１ａが形成されない空所として構成され、表示パネル１０の前記下側中央部分に対応する部位が凹状に切り欠かれた空間領域となっている。   The light guide main body 41 corresponds to a substantially flat light guide 41 a constituting a main part of the light guide main body 41 and the lower central part of the display panel 10 (that is, the second polarizing member removing part 13 a). (See FIG. 3). In this case, the space portion 41b is configured as a space where the light guide portion 41a is not formed, and is a space region in which a portion corresponding to the lower central portion of the display panel 10 is cut out in a concave shape.

第１、第２の光導入部４２、４３は、導光部４１ａの相対する一対の側壁部から光源２０の発光面に向けて垂下するように曲げられた受光部として各々構成され、その真上には、主に第１、第２の光導入部４２、４３内に各々導入された照明光を導光部４１ａ側に反射導光させる傾斜面形状（もしくは曲面形状）からなる第１、第２の反射部４４、４５がそれぞれ設けられている。   The first and second light introducing portions 42 and 43 are each configured as a light receiving portion which is bent so as to hang down from a pair of opposing side wall portions of the light guide portion 41a toward the light emitting surface of the light source 20. On the upper side, the first and the second light guiding portions 41 and 43 each have an inclined surface shape (or a curved surface shape) for reflecting and guiding the illumination light respectively introduced into the first and second light introducing portions 42 and 43 toward the light guiding portion 41a. Second reflecting portions 44 and 45 are provided, respectively.

また、４６は、第１の光導入部４２と第１の反射部４４、及び第２の光導入部４３と第２の反射部４５を通じて導光部４１内に反射導光された照明光を表示パネル１０側に出射するための平坦面からなる光出射面であり、この光出射面４６は、前方側となる導光部４１ａの前面に設けられる。   The illumination light 46 reflects the illumination light reflected and guided into the light guide 41 through the first light introduction part 42 and the first reflection part 44 and the second light introduction part 43 and the second reflection part 45. The light emission surface is a light emission surface formed of a flat surface for emission to the display panel 10 side. The light emission surface 46 is provided on the front surface of the light guide section 41a on the front side.

なお、必要に応じて、表示パネル１０を略均一にバックライト照明するための光学部材（例えば拡散シートやプリズムシート）を表示パネル１０と導光部材４０との間に１つ以上配置してもよい。   If necessary, one or more optical members (for example, a diffusion sheet or a prism sheet) for illuminating the display panel 10 with backlight substantially uniformly may be arranged between the display panel 10 and the light guide member 40. Good.

保護部材５０は、透光性合成樹脂材料によって形成され、表示パネル１０の前方側を覆うように設けられた略平板状の保護パネル部材である。また、保護部材５０は、その外形形状が表示パネル１０の外形形状よりも一回り（若干）大きく、車両用計器Ｄを前方側から見たときに表示パネル１０の外側に位置する（はみ出る）周縁部５１を有する。周縁部５１は、車両用計器Ｄを前方側から見たときに、表示パネル１０と重なり合わない非重合部として構成される。   The protection member 50 is a substantially flat protection panel member formed of a translucent synthetic resin material and provided so as to cover the front side of the display panel 10. Further, the outer shape of the protective member 50 is slightly larger (slightly larger) than the outer shape of the display panel 10, and the outer edge of the protective member 50 is located outside the display panel 10 when the instrument D for the vehicle is viewed from the front side. It has a part 51. The peripheral portion 51 is configured as a non-overlapping portion that does not overlap with the display panel 10 when the vehicle instrument D is viewed from the front side.

カメラモジュール６０は、運転席に着座する視認者の顔を撮像し、視認者の顔の動作等から視認者の状態（挙動）を検知するものであり、赤外光透過部１５（非表示領域Ｒ２）の直下に位置する。このように、本例の場合、カメラモジュール６０は表示パネル１０の背後側に配置され、視認者側からは赤外光透過部１５の存在によって視認不可能な状態となるので、商品性（デザイン性）を高めることが可能となる。   The camera module 60 captures an image of the face of the viewer sitting on the driver's seat, and detects the state (behavior) of the viewer based on the movement of the face of the viewer, and the like. R2). As described above, in the case of the present example, the camera module 60 is disposed behind the display panel 10 and is invisible from the viewer side due to the presence of the infrared light transmitting portion 15. ) Can be increased.

また、カメラモジュール６０は、図３に示すように表示パネル１０を視認可能な視認者の状態を撮像する撮像手段６１と、視認者に向けて赤外光（近赤外光）を照射する赤外線照射部６２とを備える。   Further, as shown in FIG. 3, the camera module 60 includes an imaging unit 61 that captures an image of a viewer who can view the display panel 10, and an infrared light that irradiates infrared light (near infrared light) to the viewer. An irradiation unit 62.

撮像手段６１は、近赤外領域に感度を持つカメラであり、表示パネル１０の背後側において、非表示領域Ｒ２に対向（対応）するように配置される。   The imaging unit 61 is a camera having sensitivity in the near-infrared region, and is disposed behind the display panel 10 so as to face (correspond to) the non-display region R2.

赤外線照射部６２は、撮像手段６１と同様に、表示パネル１０の背後側において、非表示領域Ｒ２に対向するように配置される。赤外線照射部６２は、表示パネル１０の板面方向において、撮像手段６１を挟むように撮像手段６１の両隣に配置された一対の赤外線光源（赤外線ＬＥＤ）を適用することができる。   The infrared irradiating unit 62 is arranged behind the display panel 10 so as to face the non-display region R2, similarly to the imaging unit 61. As the infrared irradiating unit 62, a pair of infrared light sources (infrared LEDs) arranged on both sides of the imaging unit 61 so as to sandwich the imaging unit 61 in the plate surface direction of the display panel 10 can be applied.

赤外線照射部６２から照射される赤外光は、非表示領域Ｒ２を介して（つまり赤外光透過部１５、非表示領域Ｒ２、保護部材５０を通過して）前方側に向けて照射され、視認者の顔に到達する。よって、赤外線照射部６２は、赤外光に照らされた視認者の顔を撮像することができる。さらに、視認者（視認者の顔）を照射した赤外光は逆方向（背後側）に反射して非表示領域Ｒ２を経て（つまり保護部材５０、非表示領域Ｒ２、赤外光透過部１５を通過して）撮像手段６１に入射する構成となっている。この結果、撮像手段６１は、当該逆方向に反射した反射光を画像として取得する。   The infrared light emitted from the infrared irradiator 62 is radiated toward the front side through the non-display area R2 (that is, passes through the infrared light transmitting section 15, the non-display area R2, and the protection member 50), Reach the viewer's face. Therefore, the infrared irradiator 62 can image the face of the viewer illuminated by the infrared light. Further, the infrared light emitted to the viewer (viewer's face) is reflected in the opposite direction (back side) and passes through the non-display region R2 (that is, the protection member 50, the non-display region R2, and the infrared light transmitting portion 15). (Passes through) and enters the imaging means 61. As a result, the imaging unit 61 acquires the reflected light reflected in the opposite direction as an image.

筐体７０は、車両用計器Ｄの外装ケースを構成する樹脂製の計器ハウジングであり、表示パネル１０側が開口した略箱型形状となっている。筐体７０は、回路基板３０の背後側を覆う底壁部７１と、保護部材５０の周縁部５１を支持する略枠状の周壁部７２とを備える。   The housing 70 is a resin instrument housing that forms an outer case of the instrument D for a vehicle, and has a substantially box shape with the display panel 10 side opened. The housing 70 includes a bottom wall 71 that covers the rear side of the circuit board 30 and a substantially frame-shaped peripheral wall 72 that supports the peripheral edge 51 of the protection member 50.

次に、図４に基づいて、車両用計器Ｄの電気的な構成について説明する。車両用計器Ｄは、制御部３１と、表示パネル１０と、光源２０と、撮像手段６１と、赤外線照射部６２とを備える。   Next, an electrical configuration of the vehicle instrument D will be described with reference to FIG. The vehicle instrument D includes a control unit 31, a display panel 10, a light source 20, an imaging unit 61, and an infrared irradiation unit 62.

制御部３１は、制御部３１の動作プログラムが記憶されたＲＯＭ(Read Only Memory)、前記動作プログラムを実行することで制御部３１の動作処理を実行するＣＰＵ(Central Processing Unit)、ＣＰＵ等のワークエリアとして利用されるＲＡＭ(Random Access Memory)等を有する。   The control unit 31 includes a ROM (Read Only Memory) in which an operation program of the control unit 31 is stored, a CPU (Central Processing Unit) that executes an operation process of the control unit 31 by executing the operation program, and a work such as a CPU. It has a RAM (Random Access Memory) used as an area.

制御部３１は、図示省略した車載ＥＣＵ（Electronic Control Unit）からの情報に基づいて、表示領域Ｒ１に車速表示部１４等を表示させる処理を実行する。制御部３１は、例えば図示省略した前照灯スイッチのオン操作に基づいて、光源２０を点灯させる処理を実行し、これにより車速表示部１４がバックライト照明される。   The control unit 31 executes a process of displaying the vehicle speed display unit 14 and the like in the display area R1 based on information from an in-vehicle ECU (Electronic Control Unit) not shown. The control unit 31 performs a process of turning on the light source 20 based on, for example, turning on a headlight switch (not shown), whereby the vehicle speed display unit 14 is backlit.

また、制御部３１は、撮像手段６１が撮像した画像に基づいて、視認者の状態を判断する。具体的には、制御部３１は、撮像手段６１が撮像した画像に基づいて、視認者が眠気を催している状態であるか否か、視認者が脇見運転をしている状態であるか否か等の視認者の状態を判断する処理を実行する。   Further, the control unit 31 determines the state of the viewer based on the image captured by the imaging unit 61. Specifically, the control unit 31 determines whether or not the viewer is in a state of drowsiness based on the image captured by the imaging unit 61, and whether or not the viewer is in an inattentive driving. A process for determining the state of the viewer such as is performed.

制御部３１は、例えば視認者が眠気を催している状態であると判断した場合、車両用計器Ｄに搭載されたスピーカ（図示省略）から視認者に対する注意喚起を促すための警告音（「ピー」という効果音）が吹鳴されるように、当該スピーカを動作させる処理を実行する。なお、警告音の吹鳴に代えて、制御部３１による制御のもと、表示領域Ｒ１に注意喚起を促すための警告メッセージを表示してもよい。   When the control unit 31 determines that the viewer is in a state of drowsiness, for example, a warning sound (“Peer”) for calling attention to the viewer from a speaker (not shown) mounted on the vehicle instrument D is provided. Is performed so that the sound effect is sounded). Note that a warning message for calling attention may be displayed in the display area R1 under the control of the control unit 31 instead of the sounding of the warning sound.

以上のように本実施形態では、表示パネル１０を視認可能な視認者の状態を撮像する撮像手段６１と、視認者に向けて赤外光を照射する赤外線照射部６２とを備え、撮像手段６１は、表示パネル１０の背後側において、非表示領域Ｒ２に対応するように配置され、赤外線照射部６２から照射される赤外光は非表示領域Ｒ２を介して視認者側に向けて照射されるとともに、視認者を照射した赤外光が反射して非表示領域Ｒ２を経て撮像手段６１に入射される構成としたものである。   As described above, in the present embodiment, the imaging unit 61 that captures the state of the viewer who can view the display panel 10 and the infrared irradiation unit 62 that irradiates the viewer with infrared light are provided. Is arranged on the back side of the display panel 10 so as to correspond to the non-display area R2, and the infrared light emitted from the infrared irradiation section 62 is emitted toward the viewer via the non-display area R2. At the same time, the infrared light emitted to the viewer is reflected and enters the imaging means 61 via the non-display area R2.

従って、車両用計器Ｄ内部に撮像手段６１と赤外線照射部６２とからなるカメラモジュール６０を組み込む構成を採用することで、撮像手段６１が撮像した画像に基づき視認者の状態を検出することができるという利点がある。   Therefore, by adopting a configuration in which the camera module 60 including the imaging unit 61 and the infrared irradiation unit 62 is incorporated inside the vehicle instrument D, the state of the viewer can be detected based on the image captured by the imaging unit 61. There is an advantage.

また本実施形態では、第１、第２の偏光部材除去部１２ａ、１３ａは、前記液晶表示パネル（表示パネル１０）の厚み方向Ｙにて重なり合うように設けられ、第１、第２の偏光部材除去部１２ａ、１３ａに対応する液晶セル１１部分が非表示領域Ｒ２を構成していることにより、視認者を照射した赤外光が背後側に反射し、非表示領域Ｒ２を経て撮像手段６１に入射することから、視認者の状態をより良好に検出することができるという利点がある   In this embodiment, the first and second polarizing member removing portions 12a and 13a are provided so as to overlap in the thickness direction Y of the liquid crystal display panel (display panel 10), and the first and second polarizing members are provided. Since the portions of the liquid crystal cell 11 corresponding to the removing portions 12a and 13a constitute the non-display region R2, the infrared light radiated to the viewer is reflected to the back side, and is transmitted to the imaging unit 61 via the non-display region R2. Since the light is incident, there is an advantage that the state of the viewer can be detected better.

また本実施形態では、第２の偏光部材除去部１３ａに赤外光を透過可能な赤外光透過部１５を設けたことにより、視認者側から車両用計器Ｄを見たときに撮像手段６１が赤外光透過部１５によって隠蔽されることになり、撮像手段６１の存在を目立ちにくくすることができるという利点がある。   In the present embodiment, the second polarizing member removing unit 13a is provided with the infrared light transmitting unit 15 that can transmit infrared light, so that the image capturing unit 61 can be used when the vehicle instrument D is viewed from the viewer side. Is concealed by the infrared light transmitting portion 15, and there is an advantage that the existence of the imaging means 61 can be made less noticeable.

なお、本発明は、上述の実施形態及び図面によって限定されるものではない。本発明の要旨を変更しない範囲で、適宜、実施形態及び図面に変更（構成要素の削除も含む）を加えることが可能である。   Note that the present invention is not limited by the above-described embodiment and drawings. Modifications (including deletion of components) can be made to the embodiments and drawings as appropriate without changing the gist of the present invention.

例えば上述した実施形態では、表示パネル１０における非表示領域Ｒ２の背後側に赤外線照射部６２を設けていたが、赤外線照射部６２の配設位置はこれに限定されるものではなく、例えば本実施形態の変形例として図５、図６に示すように赤外線照射部６２は保護部材５０における周縁部５１の背後側に設けることも可能である。   For example, in the above-described embodiment, the infrared irradiation unit 62 is provided behind the non-display region R2 in the display panel 10, but the arrangement position of the infrared irradiation unit 62 is not limited to this. As shown in FIGS. 5 and 6, as a modification of the embodiment, the infrared irradiation unit 62 can be provided behind the peripheral edge 51 of the protective member 50.

つまり、この変形例において、表示パネル１０の中央下部に位置する撮像手段６１と、表示パネル１０の外側（外部）に位置する赤外線照射部６２とは、ある程度、距離を離した状態で配置されることになる。赤外線照射部６２を表示パネル１０の外側に位置させることで、非表示領域Ｒ２の形成範囲を前記実施形態の場合に比べて小さくすることができる。   That is, in this modified example, the imaging unit 61 located at the lower center of the display panel 10 and the infrared irradiation unit 62 located outside (outside) the display panel 10 are arranged with a certain distance therebetween. Will be. By locating the infrared irradiating section 62 outside the display panel 10, the formation range of the non-display area R2 can be made smaller than in the above-described embodiment.

この変形例の場合、赤外線照射部６２は、周壁部７２の前面壁部７２ａに設けられた窪み部７２ｂに配置（埋設）される。窪み部７２ｂは、相対する一対の周壁部７２（図６中、左右に位置する一対の周壁部７２）の前面壁部７２ａに各々設けられ、これら２つの窪み部７２ｂに２つの赤外線照射部６２がそれぞれ配置される。そして、撮像手段６１は、これら赤外線照射部６２の間に配置されるような位置関係となる。   In the case of this modification, the infrared irradiation section 62 is disposed (buried) in a recess 72b provided in the front wall 72a of the peripheral wall 72. The recessed portions 72b are provided on the front wall portions 72a of a pair of opposed peripheral wall portions 72 (a pair of left and right peripheral wall portions 72 in FIG. 6), and two infrared irradiation portions 62 are provided on these two recessed portions 72b. Are respectively arranged. Then, the imaging unit 61 has a positional relationship such that it is disposed between the infrared irradiation units 62.

なお、赤外線光源である赤外線照射部６２は、窪み部７２ｂの底部に設けられた図示しない配線基板上に載置される。前記配線基板と回路基板とは適宜導通手段を用いて電気的に接続される。   Note that the infrared irradiator 62, which is an infrared light source, is mounted on a wiring board (not shown) provided at the bottom of the recess 72b. The wiring board and the circuit board are electrically connected to each other by using an appropriate conductive means.

そして、窪み部７２ｂに配置される赤外線照射部６２から照射される赤外光は、非表示領域Ｒ２を介さずに前方側に向けて照射される（つまり周縁部５１を通過して前方側に向けて照射される）とともに、視認者を照射した赤外光が反射して非表示領域Ｒ２を経て（つまり保護部材５０、非表示領域Ｒ２、赤外光透過部１５を通過して）撮像手段６１に入射される。このように構成した場合であっても、撮像手段６１が撮像した画像に基づき視認者の状態を検出することができる。   Then, the infrared light irradiated from the infrared irradiation unit 62 arranged in the recess 72b is irradiated forward without passing through the non-display area R2 (that is, the infrared light is transmitted forward through the peripheral edge 51). And the infrared light illuminating the viewer is reflected and passes through the non-display area R2 (that is, passes through the protection member 50, the non-display area R2, and the infrared light transmitting section 15). It is incident on 61. Even in such a case, the state of the viewer can be detected based on the image captured by the imaging unit 61.

また、上述した実施形態では、第２の偏光部材除去部１３ａに赤外光透過部１５を設けたが、赤外光透過部１５は第２の偏光部材除去部１３ａではなく第１の偏光部材除去部１２ａに設けてもよい。なお、上述した実施形態では、導光部材４０を用いて表示パネル１０をバックライト照明する構成であったが、導光部材４０を廃止して、回路基板３０上に複数個の光源２０を実装してもよい。   Further, in the above-described embodiment, the infrared light transmitting portion 15 is provided in the second polarizing member removing portion 13a, but the infrared light transmitting portion 15 is not the second polarizing member removing portion 13a but the first polarizing member. You may provide in the removal part 12a. In the above embodiment, the display panel 10 is illuminated with the backlight using the light guide member 40. However, the light guide member 40 is eliminated, and the plurality of light sources 20 are mounted on the circuit board 30. May be.

１０ 表示パネル
１１ 液晶セル
１２ 前側偏光部材
１２ａ 第１の偏光部材除去部
１３ 後側偏光部材
１３ａ 第２の偏光部材除去部
１４ 車速表示部
１５ 赤外線透過部
２０ 光源
３０ 回路基板
３１ 制御部
４０ 導光部材
５０ 保護部材
５１ 周縁部
６０ カメラモジュール
６１ 撮像手段
６２ 赤外線照射部
７０ 筐体
７２ 周壁部
７２ｂ 窪み部
Ｒ１ 表示領域
Ｒ２ 非表示領域 Reference Signs List 10 display panel 11 liquid crystal cell 12 front polarizing member 12a first polarizing member removing section 13 rear polarizing member 13a second polarizing member removing section 14 vehicle speed display section 15 infrared transmitting section 20 light source 30 circuit board 31 control section 40 light guide Member 50 Protective member 51 Peripheral part 60 Camera module 61 Imaging means 62 Infrared irradiation part 70 Housing 72 Peripheral wall part 72b Depressed part R1 Display area R2 Non-display area

Claims (3)

車両情報を表示する表示領域と前記表示領域以外の領域となる非表示領域とを有する表示手段と、
前記表示手段を視認可能な視認者の状態を撮像する撮像手段と、
前記視認者に向けて赤外光を照射する赤外線照射部とを備え、
前記撮像手段は、前記表示手段の前記視認者側とは反対側となる反視認者側において、前記非表示領域に対応するように配置され、
前記赤外線照射部から照射される前記赤外光は前記非表示領域を介するかもしくは前記非表示領域を介さずに前記視認者側に向けて照射されるとともに、前記視認者を照射した前記赤外光が反射して前記非表示領域を経て前記撮像手段に入射される構成としたことを特徴とする車両用表示装置。 Display means having a display area for displaying vehicle information and a non-display area that is an area other than the display area,
Imaging means for imaging a state of a viewer who can visually recognize the display means;
An infrared irradiation unit that irradiates infrared light toward the viewer,
The imaging unit is disposed on the opposite side to the viewer side of the display unit so as to correspond to the non-display area,
The infrared light radiated from the infrared irradiator is directed toward the viewer without passing through the non-display area or without passing through the non-display area, and the infrared light radiated to the viewer. A display device for a vehicle, wherein light is reflected and incident on the image pickup means via the non-display area. 前記表示手段は、一対の絶縁基板間に液晶を封入した液晶セルと、前記視認者側となる前記液晶セルの前側に設けられた前側偏光部材と、前記反視認者側となる前記液晶セルの後側に設けられた後側偏光部材とを備えた液晶表示パネルであり、
前記前側偏光部材は、前記前側偏光部材が部分的に除去された第１の偏光部材除去部を備え、
前記後側偏光部材は、前記後側偏光部材が部分的に除去された第２の偏光部材除去部を備え、
前記第１、第２の偏光部材除去部は、前記液晶表示パネルの厚み方向にて重なり合うように設けられ、
前記第１、第２の偏光部材除去部に対応する前記液晶セル部分が前記非表示領域を構成していることを特徴とする請求項１記載の車両用表示装置。 The display means includes a liquid crystal cell in which liquid crystal is sealed between a pair of insulating substrates, a front polarizing member provided in front of the liquid crystal cell on the viewer side, and a liquid crystal cell on the anti-viewer side. A liquid crystal display panel including a rear polarizing member provided on the rear side,
The front-side polarizing member includes a first polarizing member removal unit in which the front-side polarizing member is partially removed,
The rear polarizing member includes a second polarizing member removing portion in which the rear polarizing member is partially removed,
The first and second polarizing member removing portions are provided so as to overlap in a thickness direction of the liquid crystal display panel,
The vehicle display device according to claim 1, wherein the liquid crystal cell portion corresponding to the first and second polarizing member removing portions forms the non-display region. 前記第１の偏光部材除去部または前記第２の偏光部材除去部に前記赤外光を透過可能な赤外光透過部を設けたことを特徴とする請求項１または請求項２記載の車両用表示装置。 3. The vehicle according to claim 1, wherein the first polarizing member removing section or the second polarizing member removing section is provided with an infrared light transmitting section capable of transmitting the infrared light. Display device.
JP2018159854A 2018-08-29 2018-08-29 Vehicle display device Pending JP2020032825A (en)

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PCT/JP2019/033224 WO2020045329A1 (en) 2018-08-29 2019-08-26 Vehicle display device

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021241498A1 (en) * 2020-05-27 2021-12-02 日本精機株式会社 Vehicular display device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021241498A1 (en) * 2020-05-27 2021-12-02 日本精機株式会社 Vehicular display device

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