JP2022138244A - Area detection device - Google Patents

Area detection device Download PDF

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JP2022138244A
JP2022138244A JP2021038027A JP2021038027A JP2022138244A JP 2022138244 A JP2022138244 A JP 2022138244A JP 2021038027 A JP2021038027 A JP 2021038027A JP 2021038027 A JP2021038027 A JP 2021038027A JP 2022138244 A JP2022138244 A JP 2022138244A
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light
finger
area
emitting element
display surface
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謙一郎 玉川
Kenichiro Tamagawa
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Faurecia Clarion Electronics Co Ltd
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Faurecia Clarion Electronics Co Ltd
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Abstract

To provide an area detection device that specifies an area where an object such as a finger approaches, regardless of whether or not an object such as a finger moves.SOLUTION: An area detection device 20 is provided with four LEDs 22a to 22d arranged side by side along the width direction of the display surface of a display unit, a light-emitting element driving unit 24 for driving these four LEDs 22a to 22d so as to repeatedly light them at mutually different timings, two PDs 23a and 23b receiving light reflected by a finger in any one of five regions divided along the width direction, a separation processing unit 25 for separating the light received by the PDs 23a and 23b in correspondence with the timing at which the LEDs 22a to 22d are turned on, and a region identifying unit 26 for identifying one region where a finger exists based on the correspondence relationship between an amount of light obtained by separation and the lighted LEDs 22a to 22d.SELECTED DRAWING: Figure 5

Description

本発明は、領域検出装置に関する。 The present invention relates to area detection devices.

表示装置の表示面に表示されたアイコン等に指を接触することで、アイコン等に対応した内容を選択できるようにしたタッチパネルが知られている。このようなタッチパネルを有する表示装置は、選択された内容に応じた選択信号を出力することで、表示面に表示する内容を切り替えたり、外部の装置に選択信号を出力したりする。 2. Description of the Related Art A touch panel is known that enables selection of content corresponding to an icon or the like displayed on a display surface of a display device by touching the icon or the like with a finger. A display device having such a touch panel outputs a selection signal corresponding to the selected content, thereby switching the content displayed on the display surface or outputting the selection signal to an external device.

ここで、指等が表示面に実際に接触する前の状態、すなわち、表示面に指等が近接した状態で、表示面の表示を変化させることが提案されている。この提案は、通常は表示面の明るさを低下させた状態とし、指が近づいたときに表示面の明るさを明るく切り替えるものであり、明るさを低下させた状態では電力の消費を抑えるとともに、まぶしさを軽減することができ、一方、明るくした状態では表示内容の視認性を向上させて指による選択をし易くすることができる。 Here, it has been proposed to change the display on the display surface before the finger or the like actually touches the display surface, that is, before the finger or the like is in close proximity to the display surface. In this proposal, the brightness of the display surface is normally lowered, and when the finger approaches, the brightness of the display surface is switched to brighter. , glare can be reduced, and on the other hand, in a bright state, the visibility of display contents can be improved, making it easier to select with a finger.

また、近接した指の動きを検出するものとして、光学ジェスチャ認識システムが提案されている(例えば、特許文献1参照)。 Also, an optical gesture recognition system has been proposed as a system for detecting the motion of a close finger (see Patent Document 1, for example).

米国特許第8660300号明細書U.S. Pat. No. 8,660,300

特許文献1に開示された技術は、指の動きによって動作を特定するものであり、表示面の一部の領域に近接するときに、その近接する領域を特定するものではない。 The technique disclosed in Patent Literature 1 identifies an action based on the movement of a finger, and does not identify an adjacent area when the finger approaches a partial area of the display surface.

本発明は上記事情に鑑みなされたものであり、動きの有無に拘わらず、指等の対象物が近接する領域を特定することができる領域検出装置を提供することを目的とする。 SUMMARY OF THE INVENTION It is an object of the present invention to provide an area detection device capable of identifying an area where an object such as a finger approaches regardless of whether or not there is movement.

本発明は、所定方向に沿って並んで配置された複数の発光素子と、前記複数の発光素子を、互いに異なるタイミングで繰り返し点灯させるように、前記複数の発光素子をそれぞれ駆動する発光素子駆動部と、前記発光素子と並んで配置され、前記発光素子が点灯することにより発光し、前記所定方向に沿って分割された複数の領域のうちのいずれか一つの領域に存在した検出対象物で反射した光を受光する複数の受光素子と、前記受光素子が受光した光を、前記発光素子駆動部が前記発光素子を点灯させるタイミングに対応させて分離する分離処理部と、前記分離処理部で分離して得られた光の光量と、前記発光素子駆動部が点灯させた発光素子との対応関係に基づいて、前記検出対象物が存在する、前記所定方向に沿って分割された複数の領域のうちの一つの領域を特定する領域特定部と、を備えた領域検出装置である。 The present invention provides a plurality of light emitting elements arranged side by side along a predetermined direction, and a light emitting element driving section for driving each of the plurality of light emitting elements so as to repeatedly light the plurality of light emitting elements at mutually different timings. and the light-emitting element is arranged in parallel with the light-emitting element, and when the light-emitting element is turned on, light is emitted, and the light is reflected by the detection object present in any one of the plurality of areas divided along the predetermined direction. a plurality of light-receiving elements that receive the light received by the light-receiving elements; a separation processing unit that separates the light received by the light-receiving elements in correspondence with the timing at which the light-emitting element driving unit turns on the light-emitting elements; of the plurality of regions divided along the predetermined direction, in which the detection object exists, based on the correspondence relationship between the light quantity obtained by the light emitting element driving unit and the light emitting element turned on by the light emitting element driving unit. and an area identifying unit that identifies one of the areas.

本発明に係る領域検出装置によれば、動きの有無にかかわらず、指等の物体が近接する領域を特定することができる。 According to the area detection device according to the present invention, it is possible to specify an area where an object such as a finger approaches regardless of whether or not there is movement.

本発明の一実施形態に係る領域検出装置を備えた表示装置を示す模式図である。1 is a schematic diagram showing a display device provided with an area detection device according to an embodiment of the invention; FIG. 表示装置の筐体とセンサ基板とを示す分解図である。FIG. 3 is an exploded view showing a housing of the display device and a sensor substrate; 表示装置の鉛直面による断面図である。2 is a cross-sectional view of the display device along a vertical plane; FIG. 表示面の幅方向Wでの各LEDが発光した光の広がりを、細線及び網掛けで模式的に示した図である。FIG. 4 is a diagram schematically showing the spread of light emitted by each LED in the width direction W of the display surface by thin lines and shading. 本実施形態の領域検出装置の構成を示すブロック図である。1 is a block diagram showing the configuration of an area detection device according to this embodiment; FIG. 領域検出装置によって領域を特定する原理を説明する模式図である。FIG. 4 is a schematic diagram for explaining the principle of specifying an area by an area detection device;

以下、本発明に係る領域検出装置の具体的な実施の形態について、図面を参照して説明する。 Hereinafter, specific embodiments of an area detection device according to the present invention will be described with reference to the drawings.

図1は本発明の一実施形態に係る領域検出装置20を備えた表示装置100を示す模式図、図2は表示装置100の筐体14とセンサ基板21とを示す分解図、図3は表示装置100の鉛直面による断面図である。 FIG. 1 is a schematic diagram showing a display device 100 equipped with an area detection device 20 according to one embodiment of the present invention, FIG. 2 is an exploded view showing a housing 14 and a sensor substrate 21 of the display device 100, and FIG. 1 is a cross-sectional view through a vertical plane of device 100. FIG.

図1に示した表示装置100は、例えば、車両の室内に設置された空気調和装置を操作するための操作パネルとして用いられる。表示装置100は、表示部11と、表示制御部12と、筐体14と、領域検出装置20と、を備えている。 A display device 100 shown in FIG. 1 is used, for example, as an operation panel for operating an air conditioner installed in the interior of a vehicle. The display device 100 includes a display section 11 , a display control section 12 , a housing 14 and an area detection device 20 .

表示部11の表示面は、例えば液晶パネルで形成されていて、表示制御部12の制御によって、アイコン等の画像や文字等動作内容を表す画像を可視的に表示する。 The display surface of the display unit 11 is formed of, for example, a liquid crystal panel, and under the control of the display control unit 12, visibly displays images such as icons and images representing operation contents such as characters.

筐体14は、表示部11及び表示制御部12等を支持する部材であり、図2に示すように、前後方向の前方Fに配置された前面パネル14aと、前後方向の後方Rに配置された後側ケース14bと、を備えている。前面パネル14aは、表示部11における矩形の表示面の縁を支持する枠状に形成されていて、この枠で囲んだ内側には、タッチパネル13が一体に設けられている。後側ケース14bは、表示部11の後面側及び表示制御部12を覆っている。 The housing 14 is a member that supports the display unit 11, the display control unit 12, and the like, and as shown in FIG. and a rear case 14b. The front panel 14a is formed in the shape of a frame that supports the edges of the rectangular display surface of the display unit 11, and the touch panel 13 is provided integrally inside the frame surrounded by the front panel 14a. The rear side case 14 b covers the rear side of the display section 11 and the display control section 12 .

タッチパネル13は、例えば、操作者の指200が触ると、タッチパネル13の触った位置を検出し、その触ったタッチパネル13の位置に対応する表示面の位置に表示されていたアイコン等の内容を選択する動作を行う。 For example, when the operator's finger 200 touches the touch panel 13, the touched position of the touch panel 13 is detected, and the content such as the icon displayed at the position of the display surface corresponding to the touched position of the touch panel 13 is selected. perform the action to be performed.

そのような動作としては、例えば、表示面に表示していた内容を別の表示内容に切り替えたり、空気調和装置の動作を切り替えたり、といった動作である。そのような動作としては、例示した動作に限定されない。 Such operations include, for example, switching the content displayed on the display surface to another display content, and switching the operation of the air conditioner. Such operations are not limited to the illustrated operations.

後側ケース14bの下部(支持した表示部11の表示面よりも下方の部分)には、6個の孔14e,14f,14g,14h,14i,14jが幅方向Wに沿って並んで形成されている。後側ケース14bの後面には、センサ基板21が配置されている。センサ基板21は、後述する領域検出装置20の構成の一部である。 Six holes 14e, 14f, 14g, 14h, 14i, and 14j are formed along the width direction W in the lower portion of the rear case 14b (the portion below the display surface of the supported display unit 11). ing. A sensor substrate 21 is arranged on the rear surface of the rear case 14b. The sensor substrate 21 is part of the configuration of the area detection device 20, which will be described later.

センサ基板21は、幅方向Wに沿って延びた細長の平板状に形成されている。センサ基板21には、4つのLED(発光素子)22a,22b,22c,22dと、2つのPD(フォトダイオード;受光素子)23a,23bと、を備えている。具体的には、センサ基板21の長手方向(幅方向W)に沿って、図示の左側から、LED22a、PD23a、LED22b、LED22c、PD23b、LED22dの順序で、これらLED22a~22d及びPD23a,23bが一列に並んで配置されている。 The sensor substrate 21 is formed in an elongated flat plate shape extending along the width direction W. As shown in FIG. The sensor substrate 21 includes four LEDs (light emitting elements) 22a, 22b, 22c, 22d and two PDs (photodiodes; light receiving elements) 23a, 23b. Specifically, along the longitudinal direction (width direction W) of the sensor substrate 21, the LEDs 22a to 22d and the PDs 23a and 23b are aligned in the order of LED22a, PD23a, LED22b, LED22c, PD23b, and LED22d from the left side of the drawing. are placed side by side.

後側ケース14bの後面に、センサ基板21を配置したとき、LED22aが孔14eから、PD23aが孔14fから、LED22bが孔14gから、LED22cが孔14hから、PD23bが孔14iから、LED22dが孔14jから、それぞれ、後側ケース14bの前面側に突出するように配置される。 When the sensor board 21 is arranged on the rear surface of the rear case 14b, the LED 22a is through the hole 14e, the PD 23a is through the hole 14f, the LED 22b is through the hole 14g, the LED 22c is through the hole 14h, the PD 23b is through the hole 14i, and the LED 22d is through the hole 14j. , are arranged so as to protrude to the front side of the rear case 14b.

また、センサ基板21は、図3に示すように、後側ケース14bの後面に対して、LED22a~22d及びPD23a,23bが、水平方向の前方Fよりも高さ方向Hの上方である斜め前上方向を向くように配置される。これにより、LED22a~22d及びPD23a,23bは、前面パネル14aの下枠部分よりも上方に配置されたタッチパネル13を向いて、タッチパネル13よりも外側の空間(図3において破線で示した空間)を網掛けで示したように臨む。 Further, as shown in FIG. 3, the sensor board 21 is arranged such that the LEDs 22a to 22d and the PDs 23a and 23b are located diagonally forward with respect to the rear surface of the rear case 14b, which is higher in the height direction H than the front F in the horizontal direction. placed facing upwards. As a result, the LEDs 22a to 22d and the PDs 23a and 23b face the touch panel 13 arranged above the lower frame portion of the front panel 14a, and the space outside the touch panel 13 (the space indicated by the dashed line in FIG. 3). As indicated by the shading.

図4は表示部11の表示面の幅方向Wでの各LED22a~22dが発光した光の広がりを、細線及び網掛けで模式的に示した図である。表示面を正面からみたとき(前後方向の前方Fから後方Rに向いたとき)、各LED22a~22dはそれぞれ、図4に示した2本の細線で挟まれた網掛けの範囲を、表示面の領域に対応して幅方向Wに広がって発光する。 FIG. 4 is a diagram schematically showing the spread of light emitted by each of the LEDs 22a to 22d in the width direction W of the display surface of the display section 11 by thin lines and hatching. When the display surface is viewed from the front (when facing from the front F to the rear R in the front-rear direction), each of the LEDs 22a to 22d has a shaded area sandwiched between two thin lines shown in FIG. Light is emitted while spreading in the width direction W corresponding to the area of .

(領域検出装置)
図5は本実施形態の領域検出装置20の構成を示すブロック図である。領域検出装置20は、図5に示すように、4つのLED22a~22dと、発光素子駆動部24と、2つのPD23a,23bと、分離処理部25と、領域特定部26と、を備えている。
(area detector)
FIG. 5 is a block diagram showing the configuration of the area detection device 20 of this embodiment. As shown in FIG. 5, the area detection device 20 includes four LEDs 22a to 22d, a light emitting element driving section 24, two PDs 23a and 23b, a separation processing section 25, and an area specifying section 26. .

4つのLED22a~22dは、点灯することにより、それぞれ赤外光(赤外線)を発光する。4つのLED22a~22dは、前述したように、センサ基板21に、センサ基板21の長手方向に沿って並んで配置されている。 Each of the four LEDs 22a to 22d emits infrared light (infrared rays) when lit. The four LEDs 22a to 22d are arranged side by side along the longitudinal direction of the sensor substrate 21, as described above.

発光素子駆動部24は、4つのLED22a~22dを、互いに異なるタイミングで繰り返し点灯させるように、LED22a~22dをそれぞれ駆動する。これにより、各LED22a~22dは、例えば、時間0.05[msec(ミリ秒)]の周期、つまり20[kHz]の周波数で点灯と消灯とを繰り返す。 The light emitting element driving section 24 drives the four LEDs 22a to 22d so as to repeatedly turn on the LEDs 22a to 22d at mutually different timings. As a result, each of the LEDs 22a to 22d repeats turning on and off at a cycle of 0.05 [msec (milliseconds)], that is, at a frequency of 20 [kHz], for example.

なお、各LED22a~22dの点灯の周期は、上述した例示の周期に限定されるものではなく、より短い周期で点灯させてもよいし、より長い周期で点灯させてもよい。 The lighting cycle of each of the LEDs 22a to 22d is not limited to the cycle illustrated above, and may be lighted in a shorter cycle or longer.

また、発光素子駆動部24は、4つのLED22a,22b,22c,22dを、互いに異なるタイミングで繰り返し点灯させるように駆動する。具体的には、発光素子駆動部24は、4つのLED22a,22b,22c,22dを、この順序で、例えば、0.01[msec]ずつ点灯のタイミングをずらして点灯させる。 Further, the light-emitting element driving section 24 drives the four LEDs 22a, 22b, 22c, and 22d so as to repeatedly light them at mutually different timings. Specifically, the light-emitting element drive unit 24 lights the four LEDs 22a, 22b, 22c, and 22d in this order, for example, by shifting the lighting timing by 0.01 [msec].

つまり、LED22aが発光してから0.01[msec]後にLED22bが発光し、LED22bが発光してから0.01[msec]後にLED22cが発光し、LED22cが発光してから0.01[msec]後にLED22dが発光する。そして、LED22dが発光してから0.02[msec]後にLED22aが発光する。4つのLED22a,22b,22c,22dは、それぞれ1つずつしか点灯せず、2つ以上が同時に点灯することが無い。 That is, the LED 22b emits light 0.01 [msec] after the LED 22a emits light, the LED 22c emits light 0.01 [msec] after the LED 22b emits light, and 0.01 [msec] after the LED 22c emits light. After that, the LED 22d emits light. Then, the LED 22a emits light 0.02 [msec] after the LED 22d emits light. Only one of each of the four LEDs 22a, 22b, 22c, and 22d is lit, and two or more of them are never lit at the same time.

なお、4つのLED22a~22dは、点灯のタイミングのずれる時間間隔は、上述した例示の時間間隔に限定されるものではない。 The time intervals at which the lighting timings of the four LEDs 22a to 22d are shifted are not limited to the time intervals exemplified above.

発光素子駆動部24は、4つのLED22a~22dを同一の発光量で点灯させるように、LED22a~22dを駆動するが、個体差により、4つのLED22a~22dがそれぞれ点灯したときの発光の光量に多少の差があってもよい。また、そのような個体差により、4つのLED22a~22dの発光量が同一でないときは、発光素子駆動部24が、4つのLED22a~22dの発光量を同一とするように、4つのLED22a~22dの駆動に差をつける制御をしてもよい。 The light emitting element driving unit 24 drives the LEDs 22a to 22d so that the four LEDs 22a to 22d are lit with the same light emission amount. There may be some difference. Further, when the light emission amounts of the four LEDs 22a to 22d are not the same due to such individual differences, the light emitting element driving section 24 controls the four LEDs 22a to 22d so that the light emission amounts of the four LEDs 22a to 22d are the same. may be controlled to make a difference in driving.

2つのPD23a,23bも、上述したように、センサ基板21に、LED22a~22dと並んで配置されている。2つのPD23a,23bは、LED22a~22dが点灯して、表示面の領域に近接した操作者の指200で反射した赤外光を受光する。 The two PDs 23a and 23b are also arranged side by side with the LEDs 22a to 22d on the sensor substrate 21 as described above. The two PDs 23a and 23b light up LEDs 22a to 22d and receive the infrared light reflected by the operator's finger 200 close to the area of the display surface.

なお、図4に示すように、PD23aは、幅方向Wの、向かって左側に配置された2つのLED22a,22bの間に配置され、PD23bは、幅方向Wの、向かって右側に配置された2つのLED22c,22dの間に配置されているが、各PD23a,23bは、これらの配置に限定されるものではない。 As shown in FIG. 4, the PD 23a is arranged between the two LEDs 22a and 22b arranged on the left side in the width direction W, and the PD 23b is arranged on the right side in the width direction W. Although arranged between the two LEDs 22c and 22d, the respective PDs 23a and 23b are not limited to these arrangements.

分離処理部25は、PD23a,23bがそれぞれ受光した赤外光の光量を、発光素子駆動部24が各LED22a,22b,22c,22dを点灯させるタイミングに対応させて分離する。つまり、各PD23a,23bが、時間的に連続して受光した赤外光の光量を検出するが、分離処理部25は、点灯タイミングがずれて順次点灯するLED22a,22b,22c,22dの各点灯タイミングに対応させて、各PD23a,23bが受光した赤外光の光量を時間的に分離して離散的に検出する The separation processing unit 25 separates the amounts of infrared light received by the PDs 23a and 23b in correspondence with the timing at which the light emitting element driving unit 24 turns on the LEDs 22a, 22b, 22c and 22d. In other words, the PDs 23a and 23b detect the amount of infrared light received continuously over time, but the separation processing unit 25 detects the lighting of the LEDs 22a, 22b, 22c, and 22d that are sequentially lit at different lighting timings. The amount of infrared light received by each of the PDs 23a and 23b is temporally separated and discretely detected in correspondence with the timing .

これによって、例えば、幅方向Wの最も左側に配置されたLED22aが点灯したタイミングで各PD23a,23bがそれぞれ検出した光量は、LED22aから発光した赤外光が、表示面の幅方向Wに沿って分割された5つの領域A,B,C,D,Eのうちのいずれか一つの領域に存在する操作者の指200で反射した赤外光によるものと特定することができる。 As a result, for example, the amount of light detected by each of the PDs 23a and 23b at the timing when the LED 22a arranged on the leftmost side in the width direction W is lit is It can be specified that it is caused by the infrared light reflected by the operator's finger 200 existing in one of the five divided areas A, B, C, D, and E. FIG.

同様に、幅方向Wの左側から2番目に配置されたLED22bが点灯したタイミングで各PD23a,23bがそれぞれ検出した光量は、LED22bから発光した赤外光が、表示面のいずれか一つの領域に存在する操作者の指200で反射した赤外光によるものと特定することができる。 Similarly, the amount of light detected by each of the PDs 23a and 23b at the timing when the LED 22b arranged second from the left side in the width direction W is turned on indicates that the infrared light emitted from the LED 22b is projected onto any one region of the display surface. It can be identified as being caused by infrared light reflected by the existing operator's finger 200 .

同様に、幅方向Wの左側から3番目(右から2番目)に配置されたLED22cが点灯したタイミングで各PD23a,23bがそれぞれ検出した光量は、LED22cから発光した赤外光が、表示面のいずれか一つの領域に存在する操作者の指200で反射した赤外光によるものと特定することができ、幅方向Wの左側から4番目(最も右側)に配置されたLED22dが点灯したタイミングで各PD23a,23bがそれぞれ検出した光量は、LED22dから発光した赤外光が、表示面のいずれか一つの領域に存在する操作者の指200で反射した赤外光によるものと特定することができる。 Similarly, the amount of light detected by each of the PDs 23a and 23b at the timing when the LED 22c arranged third from the left (second from the right) in the width direction W is turned on, is the infrared light emitted from the LED 22c. It can be specified that it is due to the infrared light reflected by the operator's finger 200 existing in any one area, and at the timing when the LED 22d arranged on the fourth (rightmost) from the left side in the width direction W is turned on. The amount of light detected by each of the PDs 23a and 23b can be identified as infrared light emitted from the LED 22d and reflected by the operator's finger 200 present in any one area of the display surface. .

図6は、表示装置100の表示部11の表示面を、幅方向Wに沿って5つの領域A,B,C,D,Eに分割したときに、検出対象である操作者の指200が表示面の各領域に近接したときに、PD23a又はPD23bが検出する赤外光の光量の一例を示す模式図である。 FIG. 6 shows that when the display surface of the display unit 11 of the display device 100 is divided into five regions A, B, C, D, and E along the width direction W, the finger 200 of the operator to be detected is FIG. 4 is a schematic diagram showing an example of the amount of infrared light detected by a PD 23a or a PD 23b when approaching each region of the display surface;

図6において、実細線は、最も左側に配置されたLED22aが点灯したタイミングで、PD23a又はPD23bが検出する反射光(赤外光)の光量を示すグラフである。つまり、最も左側のLED22aが点灯したタイミングでは、表示面の最も左側の領域Aに、操作者の指200が近接しているときに、指200で反射してPD23aが受光する赤外光の光量が最も大きい。なお、右側に配置されているPD23bは、検出範囲(網掛けの範囲)外であるため、反射光をほとんど検出しない。 In FIG. 6, the solid thin line is a graph showing the amount of reflected light (infrared light) detected by the PD 23a or PD 23b at the timing when the leftmost LED 22a is turned on. That is, at the timing when the leftmost LED 22a is turned on, when the operator's finger 200 is close to the leftmost area A of the display surface, the amount of infrared light reflected by the finger 200 and received by the PD 23a is is the largest. The PD 23b located on the right side is outside the detection range (shaded area), so it hardly detects the reflected light.

また、表示面の左から2番目の領域Bに、操作者の指200が近接しているときは、領域Aに近接しているときよりも、指200で反射してPD23aが受光する赤外光の光量は小さい。さらに、表示面の中央の領域Cに、操作者の指200が近接しているときは、領域Bに近接しているときよりも、指200で反射してPD23a又はPD23bが受光する赤外光の光量はさらに小さい。 Further, when the operator's finger 200 is close to the second area B from the left on the display surface, the infrared rays reflected by the finger 200 and received by the PD 23a are more than when the operator's finger 200 is close to the area A. The amount of light is small. Furthermore, when the operator's finger 200 is close to the region C in the center of the display surface, the infrared light reflected by the finger 200 and received by the PD 23a or PD 23b is higher than when the finger 200 is close to the region B. is even smaller.

そして、表示面の右から2番目の領域Dや最も右側の領域Eに、操作者の指200が近接しているときは、指200で反射してPD23a又はPD23bが受光する赤外光の光量はほぼゼロとなる。 When the operator's finger 200 is close to the second area D from the right or the rightmost area E of the display surface, the amount of infrared light reflected by the finger 200 and received by the PD 23a or PD 23b is becomes almost zero.

図6において、実太線は、左から2番目に配置されたLED22bが点灯したタイミングで、PD23a又はPD23bが検出する反射光(赤外光)の光量を示すグラフである。つまり、左から2番目のLED22bが点灯したタイミングでは、表示面の左から2番目の領域Bに、操作者の指200が近接しているときに、指200で反射してPD23aが受光する赤外光の光量が最も大きい。 In FIG. 6, the solid thick line is a graph showing the amount of reflected light (infrared light) detected by the PD 23a or PD 23b at the timing when the second LED 22b from the left is turned on. That is, at the timing when the second LED 22b from the left is turned on, when the operator's finger 200 is close to the second area B from the left of the display surface, the red light reflected by the finger 200 and received by the PD 23a The amount of external light is the largest.

また、表示面の最も左側の領域A又は中央の領域Cに、操作者の指200が近接しているときは、領域Bに近接しているときよりも、指200で反射してPD23aが受光する赤外光の光量は小さい。さらに、表示面の右から2番目の領域Dに、操作者の指200が近接しているときは、領域A,Cに、操作者の指200が近接しているときよりも、指200で反射してPD23a又はPD23bが受光する赤外光の光量はさらに小さい。 Further, when the operator's finger 200 is close to the leftmost area A or the center area C of the display surface, the light is reflected by the finger 200 and received by the PD 23a more than when it is close to the area B. The amount of infrared light emitted is small. Furthermore, when the operator's finger 200 is close to area D, which is the second from the right on the display surface, the operator's finger 200 is closer to areas A and C than when operator's finger 200 is close to areas A and C. The amount of reflected infrared light received by the PD 23a or PD 23b is even smaller.

そして、表示面の最も右側の領域Eに、操作者の指200が近接しているときは、指200で反射してPD23a又はPD23bが受光する赤外光の光量はほぼゼロとなる。 When the operator's finger 200 is close to the rightmost region E of the display surface, the amount of infrared light reflected by the finger 200 and received by the PD 23a or PD 23b is almost zero.

図6において、破線は、右から2番目に配置されたLED22cが点灯したタイミングで、PD23a又はPD23bが検出する反射光(赤外光)の光量を示すグラフである。つまり、右から2番目のLED22cが点灯したタイミングでは、表示面の右から2番目の領域Dに、操作者の指200が近接しているときに、指200で反射してPD23bが受光する赤外光の光量が最も大きい。 In FIG. 6, the dashed line is a graph showing the amount of reflected light (infrared light) detected by the PD 23a or PD 23b at the timing when the second LED 22c from the right is turned on. That is, at the timing when the second LED 22c from the right is turned on, when the operator's finger 200 is close to the second area D from the right of the display surface, the red light reflected by the finger 200 and received by the PD 23b The amount of external light is the largest.

また、表示面の最も右側の領域E又は中央の領域Cに、操作者の指200が近接しているときは、領域Dに近接しているときよりも、指200で反射してPD23bが受光する赤外光の光量は小さい。さらに、表示面の左から2番目の領域Bに、操作者の指200が近接しているときは、領域E,Cに、操作者の指200が近接しているときよりも、指200で反射してPD23a又はPD23bが受光する赤外光の光量はさらに小さい。 Further, when the operator's finger 200 is close to the rightmost area E or the center area C of the display surface, the light is reflected by the finger 200 and received by the PD 23b more than when it is close to the area D. The amount of infrared light emitted is small. Furthermore, when the operator's finger 200 is close to area B, which is the second from the left on the display surface, the operator's finger 200 is closer to areas E and C than when the operator's finger 200 is close to areas E and C. The amount of reflected infrared light received by the PD 23a or PD 23b is even smaller.

そして、表示面の最も左側の領域Aに、操作者の指200が近接しているときは、指200で反射してPD23a又はPD23bが受光する赤外光の光量はほぼゼロとなる。 When the operator's finger 200 is close to the leftmost area A of the display surface, the amount of infrared light reflected by the finger 200 and received by the PD 23a or PD 23b is almost zero.

図6において、一点鎖線は、最も右側に配置されたLED22dが点灯したタイミングで、PD23a又はPD23bが検出する反射光(赤外光)の光量を示すグラフである。つまり、最も右側のLED22dが点灯したタイミングでは、表示面の最も右側の領域Eに、操作者の指200が近接しているときに、指200で反射してPD23bが受光する赤外光の光量が最も大きい。なお、左側に配置されているPD23bは、検出範囲(網掛けの範囲)外であるため、反射光をほとんど検出しない。 In FIG. 6, the dashed-dotted line is a graph showing the amount of reflected light (infrared light) detected by the PD 23a or PD 23b at the timing when the rightmost LED 22d is turned on. That is, at the timing when the rightmost LED 22d is turned on, when the operator's finger 200 is close to the rightmost area E of the display surface, the amount of infrared light reflected by the finger 200 and received by the PD 23b is is the largest. Note that the PD 23b located on the left side is outside the detection range (shaded area), so it hardly detects the reflected light.

また、表示面の右から2番目の領域Dに、操作者の指200が近接しているときは、領域Eに近接しているときよりも、指200で反射してPD23bが受光する赤外光の光量は小さい。さらに、表示面の中央の領域Cに、操作者の指200が近接しているときは、領域Dに近接しているときよりも、指200で反射してPD23a又はPD23bが受光する赤外光の光量はさらに小さい。 Further, when the operator's finger 200 is close to the second region D from the right of the display surface, the infrared rays reflected by the finger 200 and received by the PD 23b are more than when the finger 200 is close to the region E. The amount of light is small. Furthermore, when the operator's finger 200 is close to the area C in the center of the display surface, the infrared light reflected by the finger 200 and received by the PD 23a or PD 23b is higher than when the operator's finger 200 is close to the area D. is even smaller.

そして、表示面の左から2番目の領域Bや最も左側の領域Aに、操作者の指200が近接しているときは、指200で反射してPD23a又はPD23bが受光する赤外光の光量はほぼゼロとなる。 When the operator's finger 200 is close to the second area B from the left or the leftmost area A on the display surface, the amount of infrared light reflected by the finger 200 and received by the PD 23a or PD 23b is becomes almost zero.

また、領域Aに近接した指200で反射してPD23a又はPD23bが受光する赤外光の光量は、LED22aが点灯したタイミングで受光した光量が最も大きく、次いで、LED22bが点灯したタイミングで受光した光量が大きく、次いで、LED22cが点灯したタイミングで受光した光量が大きく、LED22dが点灯したタイミングで受光した光量が最も小さい。 Further, regarding the amount of infrared light received by the PD 23a or PD 23b after being reflected by the finger 200 close to the area A, the amount of light received at the timing when the LED 22a is turned on is the largest, followed by the amount of light received at the timing when the LED 22b is turned on. is large, the amount of light received at the timing when the LED 22c is turned on is large, and the amount of light received at the timing when the LED 22d is turned on is the smallest.

また、領域Eに近接した指200で反射してPD23a又はPD23bが受光する赤外光の光量は、LED22dが点灯したタイミングで受光した光量が最も大きく、次いで、LED22cが点灯したタイミングで受光した光量が大きく、次いで、LED22bが点灯したタイミングで受光した光量が大きく、LED22aが点灯したタイミングで受光した光量が最も小さい。 Further, regarding the amount of infrared light received by the PD 23a or PD 23b after being reflected by the finger 200 close to the area E, the amount of light received at the timing when the LED 22d is turned on is the largest, followed by the amount of light received at the timing when the LED 22c is turned on. is large, the amount of light received at the timing when the LED 22b is turned on is large, and the amount of light received at the timing when the LED 22a is turned on is the smallest.

また、領域Bに近接した指200で反射してPD23a又はPD23bが受光する赤外光の光量は、LED22bが点灯したタイミングで受光した光量が最も大きく、次いで、LED22aが点灯したタイミングで受光した光量が大きく、次いで、LED22cが点灯したタイミングで受光した光量が大きく、LED22dが点灯したタイミングで受光した光量が最も小さい。 Further, regarding the amount of infrared light received by the PD 23a or PD 23b after being reflected by the finger 200 close to the region B, the amount of light received at the timing when the LED 22b is turned on is the largest, followed by the amount of light received at the timing when the LED 22a is turned on. is large, the amount of light received at the timing when the LED 22c is turned on is large, and the amount of light received at the timing when the LED 22d is turned on is the smallest.

また、領域Dに近接した指200で反射してPD23a又はPD23bが受光する赤外光の光量は、LED22cが点灯したタイミングで受光した光量が最も大きく、次いで、LED22dが点灯したタイミングで受光した光量が大きく、次いで、LED22bが点灯したタイミングで受光した光量が大きく、LED22aが点灯したタイミングで受光した光量が最も小さい。 Further, regarding the amount of infrared light received by the PD 23a or PD 23b after being reflected by the finger 200 close to the area D, the amount of light received at the timing when the LED 22c is turned on is the largest, followed by the amount of light received at the timing when the LED 22d is turned on. is large, the amount of light received at the timing when the LED 22b is turned on is large, and the amount of light received at the timing when the LED 22a is turned on is the smallest.

また、領域Cに近接した指200で反射してPD23a又はPD23bが受光する赤外光の光量は、LED22b又はLED22cが点灯したタイミングで受光した光量が最も大きく、次いで、LED22c又はLED22bが点灯したタイミングで受光した光量が大きく、LED22a又はLED22dが点灯したタイミングで受光した光量が最も小さい。 Further, the amount of infrared light received by the PD 23a or PD 23b after being reflected by the finger 200 close to the area C is the largest at the timing when the LED 22b or the LED 22c is lit, followed by the timing when the LED 22c or the LED 22b is lit. The amount of light received is large at the timing when the LED 22a or the LED 22d is turned on, and the amount of light received is the smallest.

なお、領域Aと領域Bとの境界は、LED22aが点灯したタイミングで受光した光量とLED22bが点灯したタイミングで受光した光量とが等しくなる位置である。また、領域Eと領域Dとの境界は、LED22dが点灯したタイミングで受光した光量とLED22cが点灯したタイミングで受光した光量とが等しくなる位置である。 The boundary between the area A and the area B is the position where the amount of light received when the LED 22a is turned on is equal to the amount of light received when the LED 22b is turned on. The boundary between the area E and the area D is the position where the amount of light received at the timing when the LED 22d is turned on is equal to the amount of light received at the timing when the LED 22c is turned on.

また、領域Bと領域Cとの境界は、LED22aが点灯したタイミングで受光した光量とLED22cが点灯したタイミングで受光した光量とが等しくなる位置である。また、領域Dと領域Cとの境界は、LED22dが点灯したタイミングで受光した光量とLED22bが点灯したタイミングで受光した光量とが等しくなる位置である。 The boundary between the area B and the area C is a position where the amount of light received when the LED 22a is turned on is equal to the amount of light received when the LED 22c is turned on. The boundary between the area D and the area C is the position where the amount of light received when the LED 22d is turned on is equal to the amount of light received when the LED 22b is turned on.

以上のように、各LED22a~22dが点灯したタイミングでPD23a又はPD23bが受光した反射光の光量は、指200が近接している領域A~Eに応じた大小関係がある。 As described above, the amount of reflected light received by the PD 23a or the PD 23b at the timing when each of the LEDs 22a to 22d is turned on has a size relationship according to the areas A to E to which the finger 200 is close.

領域特定部26は、分離処理部25で分離して得られた反射光の光量と、発光素子駆動部24が点灯させたLED22a~22dの点灯のタイミングとの対応関係に基づいて、すなわち、各LED22a~22dが点灯したタイミングでPD23a又はPD23bが受光した反射光の光量の大小関係に基づいて、検出対象である指200が近接している領域A~Eを特定する。 The region specifying unit 26 determines the amount of reflected light obtained by the separation processing unit 25 based on the correspondence relationship between the light amount of the reflected light and the lighting timing of the LEDs 22a to 22d turned on by the light emitting element driving unit 24. That is, each Areas A to E in which the finger 200, which is a detection target, is close are specified based on the magnitude relationship of the amount of reflected light received by the PD 23a or PD 23b at the timing when the LEDs 22a to 22d are turned on.

以上のように、本実施形態の領域検出装置20によれば、指200が静止しているか又は動いているかの別に拘わらず、指200がタッチパネル13に触れる前の近接した状態で、表示面の分割された領域A~Eのうち指200が近ついた一つの領域を特定することができる。 As described above, according to the area detection device 20 of the present embodiment, regardless of whether the finger 200 is stationary or moving, the finger 200 is in proximity to the touch panel 13 before it touches the display surface. One of the divided areas A to E to which the finger 200 approaches can be identified.

これにより、表示面に指200が近づいていない状態のときは、表示面の明るさを低下させて操作者が眩しくないようにしておき、指200が近づいたときは、タッチパネル13に触れる前に、その指200が近づいたいずれか一つの領域A、領域B、領域C、領域D又は領域Eに対応した表示面の範囲だけを明るく切り替え、他の領域を暗い状態に維持するなどの処理を行うことができる。 As a result, when the finger 200 is not approaching the display surface, the brightness of the display surface is reduced so that the operator is not dazzled, and when the finger 200 approaches the touch panel 13, the operator is prevented from being dazzled. , the range of the display surface corresponding to any one of the areas A, B, C, D, or E to which the finger 200 has approached is switched bright, and the other areas are kept dark. It can be carried out.

なお、指200が近づく前は表示面の全体を暗くし、指200が近づいた領域に対応する表示面の範囲だけを明るくする処理に代えて、指200が近づく前も表示面の全体を明るくし、指200が近づいた領域に対応する表示面の範囲だけをコントラストを高める等の強調処理を行うようにしてもよい。 Instead of darkening the entire display surface before the finger 200 approaches and brightening only the range of the display surface corresponding to the area to which the finger 200 approaches, the entire display surface is brightened even before the finger 200 approaches. However, enhancement processing such as increasing the contrast may be performed only on the range of the display surface corresponding to the area where the finger 200 approaches.

また、指200等の検出対象物が近接した領域を特定するに際して、特定し得る領域の分解能を高める(狭い領域を特定することができる)ことにより、接触した位置を検出するタッチパネル13を不要にすることもできる。 Further, when identifying an area in which a detection object such as the finger 200 is in close proximity, the touch panel 13 for detecting the contact position is not required by increasing the resolution of the area that can be identified (a narrow area can be identified). You can also

本実施形態の領域検出装置20は、表示面の幅方向Wに沿って分割された5つの領域A,B,C,D.Eのうち一つの領域を特定するものであるが、分割された領域の数は5つに限定されるものではなく、3つや4つであってもよいし、6つ以上であってもよい。この場合、分割された領域の数に応じて、発光素子や受光素子の数量を適宜変更すればよい。 The area detection device 20 of this embodiment has five areas A, B, C, D, . Although one region is specified in E, the number of divided regions is not limited to five, and may be three, four, or six or more. . In this case, the number of light-emitting elements and light-receiving elements may be appropriately changed according to the number of divided regions.

なお、発光素子の数は2個以上であればよく、受光素子の数は1個以上であればよい。本実施形態における受光素子も、受光の角度範囲がPD23a,23bより広いものであれば、LED22bとLED22cとの間に1つだけ配置したものでもよい。 Note that the number of light-emitting elements should be two or more, and the number of light-receiving elements should be one or more. Only one light receiving element in this embodiment may be arranged between the LED 22b and the LED 22c as long as the light receiving angle range is wider than that of the PDs 23a and 23b.

本実施形態の領域検出装置20は、各LED22a~22dの点灯タイミングで受光した光量(受光量)の単純な大小比較によって、検出対象である指200が存在する領域を特定したが、受光量の単純な大小比較ではなく、一方の受光量には予め設定された定数を乗じた値として大小比較(一方の受光量の何割以上か、といった判定方法)を行うことで、検出対象である指200が存在する領域を特定するなどの特定方法を適用してもよい。 The area detection device 20 of the present embodiment specifies the area where the finger 200, which is the detection target, exists by simply comparing the amount of light received at the lighting timing of each of the LEDs 22a to 22d (the amount of received light). Instead of a simple size comparison, the amount of light received on one side is multiplied by a preset constant. An identifying method such as identifying an area where 200 exists may be applied.

本実施形態の領域検出装置20は、表示面の幅方向Wに沿って分割された複数の領域のうち一つの領域を特定するものであるが、表示面の高さ方向Hに沿って分割された複数の領域のうち一つの領域を特定するように、複数の発光素子(例えばLED)を高さ方向Hに沿って並ぶように配置し、複数の受光素子(例えばPD)を高さ方向Hに沿って並ぶように配置してもよい。 The area detection device 20 of the present embodiment specifies one of a plurality of areas divided along the width direction W of the display surface. A plurality of light-emitting elements (e.g., LEDs) are arranged along the height direction H so as to specify one of the plurality of areas, and a plurality of light-receiving elements (e.g., PD) are arranged in the height direction H. You may arrange it so that it may line up along.

また、本実施形態の領域検出装置20において、表示面の幅方向Wに沿って分割された複数の領域のうち一つの領域を特定するとともに、表示面の高さ方向Hに沿って分割された複数の領域のうち一つの領域を特定することで、幅方向Wと高さ方向Hとにそれぞれ分割された格子状の領域の一つを特定するようにしてもよい。 Further, in the area detection device 20 of the present embodiment, one of the plurality of areas divided along the width direction W of the display surface is specified, and the area divided along the height direction H of the display surface is specified. By specifying one of the plurality of regions, one of the grid-like regions divided in the width direction W and the height direction H may be specified.

この場合、複数の発光素子及び複数の受光素子を、幅方向Wと高さ方向Hとにそれぞれ沿って並ぶように配置し、幅方向Wと高さ方向Hとの両方において点灯のタイミングをそれぞれずらして、発光素子を発光させればよい。 In this case, a plurality of light-emitting elements and a plurality of light-receiving elements are arranged so as to line up along the width direction W and the height direction H, respectively, and lighting timings are set in both the width direction W and the height direction H. The light-emitting element may be caused to emit light by shifting.

本実施形態の領域検出装置20は、LED22a~22dが発光する光として、人が肉眼で視認することができない赤外光を適用したため、操作者は、表示部11に表示されたアイコン等の、可視的に表示されたものの視認性を低下させることが無い。 Since the region detection device 20 of the present embodiment uses infrared light, which cannot be visually recognized by the human eye, as the light emitted by the LEDs 22a to 22d, the operator can easily see the icons displayed on the display unit 11. It does not reduce the visibility of what is visibly displayed.

ただし、本発明に係る領域検出装置は、発光素子が発光する光として赤外光に限定するものではなく、不可視の光やその他の人体で反射する電磁波であってもよい。この場合、受光素子も、発光素子の発光する光やその他の人体で反射する電磁波を受光し得るものであればよい。 However, in the area detection device according to the present invention, the light emitted by the light emitting element is not limited to infrared light, and invisible light or other electromagnetic waves reflected by the human body may be used. In this case, the light-receiving element may also be one that can receive the light emitted by the light-emitting element or other electromagnetic waves reflected by the human body.

本実施形態の領域検出装置20は、表示部11を有する表示装置100が備えたものとして説明したが、本発明に係る領域検出装置は、表示部11を有する表示装置100が備えたものでなく、領域検出装置のみで独立したものであってもよい。 Although the area detection device 20 of the present embodiment has been described as being included in the display device 100 having the display unit 11, the area detection device according to the present invention is not included in the display device 100 having the display unit 11. , the area detection device may be independent.

なお、本発明に係る領域検出装置は、表示部11を有する表示装置100に備えられたものではないなどの理由で、視認性の影響を考慮しない場合は、発光素子が発光する光として可視光を適用してもよい。 Note that the area detection device according to the present invention is not provided in the display device 100 having the display unit 11, and for the reason that the visibility effect is not taken into consideration, visible light is used as the light emitted by the light emitting element. may apply.

11 表示部
13 タッチパネル
20 :領域検出装置
21 :センサ基板
22a~22d LED
23a,23b PD
24 発光素子駆動部
25 分離処理部
26 領域特定部
100 表示装置
200 指
A~E 領域
W 幅方向
11 display unit 13 touch panel 20: area detection device 21: sensor substrate 22a to 22d LED
23a, 23b PDs
24 light-emitting element driving unit 25 separation processing unit 26 region specifying unit 100 display device 200 fingers A to E region W width direction

Claims (4)

所定方向に沿って並んで配置された複数の発光素子と、
前記複数の発光素子を、互いに異なるタイミングで繰り返し点灯させるように、前記複数の発光素子をそれぞれ駆動する発光素子駆動部と、
前記発光素子と並んで配置され、前記発光素子が点灯することにより発光し、前記所定方向に沿って分割された複数の領域のうちのいずれか一つの領域に存在した検出対象物で反射した光を受光する複数の受光素子と、
前記受光素子が受光した光を、前記発光素子駆動部が前記発光素子を点灯させるタイミングに対応させて分離する分離処理部と、
前記分離処理部で分離して得られた光の光量と、前記発光素子駆動部が点灯させた発光素子との対応関係に基づいて、前記検出対象物が存在する、前記所定方向に沿って分割された複数の領域のうちの一つの領域を特定する領域特定部と、を備えた領域検出装置。
a plurality of light emitting elements arranged side by side along a predetermined direction;
a light-emitting element driving unit that drives each of the plurality of light-emitting elements so as to repeatedly light the plurality of light-emitting elements at different timings;
Light that is arranged in parallel with the light-emitting element, emits light when the light-emitting element is turned on, and is reflected by a detection target existing in any one of a plurality of areas divided along the predetermined direction. a plurality of light-receiving elements that receive
a separation processing unit that separates the light received by the light-receiving element in correspondence with the timing at which the light-emitting element driving unit turns on the light-emitting element;
Division along the predetermined direction in which the detection object exists based on the correspondence relationship between the amount of light obtained by separation by the separation processing unit and the light emitting element turned on by the light emitting element driving unit and an area identifying unit that identifies one of the plurality of identified areas.
前記発光素子及び前記受光素子は、画像を表示する表示面の延びた方向に沿って配置され、
前記領域特定部は、前記表示面の延びた方向に沿って分割された複数の領域のうち一つの領域を特定する、請求項1に記載の領域検出装置。
the light-emitting element and the light-receiving element are arranged along a direction in which a display surface displaying an image extends;
2. The area detection device according to claim 1, wherein said area specifying unit specifies one of a plurality of areas divided along the extending direction of said display surface.
前記発光素子が点灯することにより発光する光が赤外光であり、前記受光素子は前記赤外光の反射光を受光する、請求項1又は2に記載の領域検出装置。 3. The area detection device according to claim 1, wherein the light emitted by said light emitting element is infrared light, and said light receiving element receives reflected light of said infrared light. 前記発光素子は、画像を表示する表示部の表示面の範囲を前記複数の領域に分割するように、前記表示面の延びた方向に沿って配置され、
前記受光素子は、前記検出対象物として、前記複数の領域のうちいずれか一つの領域に近接した操作者の指で反射した光を検出する、請求項1から3のうちいずれか1項に記載の領域検出装置。
the light emitting elements are arranged along the direction in which the display surface extends so as to divide the range of the display surface of the display unit that displays an image into the plurality of regions;
4. The light receiving element according to any one of claims 1 to 3, wherein the light receiving element detects light reflected by an operator's finger in proximity to any one of the plurality of areas as the object to be detected. area detector.
JP2021038027A 2021-03-10 2021-03-10 Area detection device Pending JP2022138244A (en)

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