M434221 » 五、新型說明： 【新型所屬之技術領域】 。。本創作係有關於一種感測器，尤指光學式非接觸近接偵測 器。 - 【先前技術】 . 、目誕制物聽近的翻上，絲式近接_器已廣泛 • 被使用，舉例來說，隨著電池運作的手持式裝置(例如行動電 話)的進展，這些感測器的價值最近變得更為重要。舉例而言， 利=光學式近接侧器來侧物體存在，例如感測機械上的保 。蔓蓋何日化崎開、紙張何時已魅確置於印表機、或者操作 員的手何財接近猶巾之機器的驗。光學式近賊測器也 可以使用做為簡單之觸碰或接近觸碰所致動的開關， 鲁 如第1A圖所示，一般光學式近接偵測器10包括一透光 板Η、—光線阻斷機構13、一發光元件15以及一光偵測元件 17 °當物體50靠近光學式近接細器10時，發光元件15所 發射的光束’特別是發射的角度小於有效發射角度仏的發射光 將被物體50所反射’該有效發射肖度θ|是自光射且斷機構 13、發光兀件15及光偵測元件17的相對位置所決定；而大於 有效發射角度0,的發射光h，則被光線阻斷機構13阻隔。光 偵測元件17可偵測來自物體5〇的反射光，同樣地，光偵測元 件17具有一有效接收角度仏，光偵測元件Η僅可接收反射角 3 度小於有效接收角度θ2(即可視角）的反射光η ;而反射角度大 於有效接收角度θ2的反射光r2，則被光線阻斷機構13阻隔。 光學式近接偵測器1 〇藉由光偵測元件17偵測的反射光的強度 大小來估計物體50與透光板11之間的距離d，如第1B圖所 示’當物體50從距透光板11較遠的距離山移動至距透光板 11較近的距離屯時，反射光的訊號強度大小改變，並隨著距 離的減少，訊號強度逐漸增強。 然而’當物體50處在距透光板11極近端時，例如距離 山等於5mm或趨近於零，由於光線在固定的可視角下.，造成 反射光的路徑大部分被物體5〇所阻絕或被光線阻斷機構13所 吸收，使得光學式近接偵測器10接收到的反射光量很少(即光 sfU虎強度很小）’特別是當物體5〇為深色時，例如黑頭髮或黑 皮膚等。如此，光學式近接偵測器10誤判物體5〇處於遠端的 狀態，進而產生錯誤的狀態回報而造成誤動作。因此，改善現 有的近端偵測技術會產生誤判的問題是有其必要的。 【新型内容】 為了解決上述問題，本創作的目的在於，提供一種光學式 近接偵測器，藉由調整發光單元與光偵測單元的位置，以及設 计光線阻峨翻A小、寬度及形狀，以控辦光單元的有效 毛射角度及光伽彳單元的可視角。如此，可同時滿足光學串訊 取小化與極近端侧鮮b；tA化的功效，使得即使物體貼近偵 測器時仍可被偵測。 根據本創作的一實施例，提供一種光學式近接偵測器，包 括一透光板、一光線阻斷機構、一發光單元以及一光偵測單 兀。邊透光板具有一第一側面及一第二側面，該第一側面與該 第二側面互相平行並定義出該透光板的一厚度；該光線阻斷機 構設置在該第二側面上，該光線阻斷機構的寬度介於該厚度的 0.35倍到2倍之間；該發光單元鄰近於該第二側面，且位於該 光線阻斷機構的—側’該發光單元用_向該第二侧面發射— 光束，該光束的有效發射角度介於15度至60度之間；而該光 偵測單元鄰近於該第二侧面，且位於該光線阻斷機構的另— 側，該光侧單元肋侧具有與該絲姻波長的反射光， 且該光細單元具有—有效侧角度，藉此，當-物體緊鄰或 貼近該透光板時’絲侧單元可侧_反射光的訊號強度 大於遠物體遠離時的該反射光的訊號強度。 是故，由上述可知，本創作可解決一般光學式近接偵測器 對於極近端物體產生誤__，錄高絲式近接偵測器的 可罪度。同時，亦不用再受限於傳統機構的限制，可以讓包覆 於偵測器的外部元件(例如透光玻璃元件等)厚度可被製造得 更細更薄。 【實施方式】 為進—步說明各實施例，本創作乃提供有圖式。此些圖式 乃為本創作揭路内谷之—部分，其主要侧以說明實施例，並 可配合制書之_描述麵釋實施例的運作顧。配合參考 這些内容，本領域财通常知識者魏轉其他可⑽實施方 式以及本創作之伽。辭的元件縣按比繼製，而類似的 元件符號通常用來表示類似的元件。 首先❼考第2A圖’其顯示依據本創作光學式近接偵測 器的第-實施例之示意圖。如第2A圖所示，光學式近接侦測 器20a包括-透光板21、一光線阻斷機構以、一發光單元^ 以及-光侧單το 27。射光線崎機構a、發光單元μ以 及光侧單元27皆位於透光板21的同—侧。具體地說，透光 板21具有一第一側面Sl及-第二側面S2，其中第一側面Sl 與該第二 s2互相平行並定義出該透光板2i的—厚度τ。 光線阻斷機構23設置在該第二伽s山崎辟元Μ及 光^單元27㈣近於該第二側面&，且發光單元μ及光偵 測單元27分別位於光線阻斷機構23的兩相異側。 此光學式近接侧器2〇a可安裝於個人數位助理(pDA)、 行動電話及平板電腦等—子裝置產品，用以侧外界物 體（圖未示），例如人臉、人耳等任何可能靠近電子裝置的物 體的接近，進而控制電子裝置的功能切換。 本創作的技術無在於，藉由設計透输21的厚度τ及 材質特性、光線_機構23的寬度w，以控制發光單元^ 及光偵測單元27的可視角糊，姻可铜姆極靠近或貼 近透光板21。熟悉該項技藝者應可理解，第2a圖僅顯示了光 學式近接偵測器孤的-部份，光學式近翻測器施還包括 處理器或電路（圖未示），該電路例如邏輯電路等，分接 於光偵測單元27，處理ϋ或電路根據絲測單元2?所偵測的 光線訊號強度大小來績物體與透光板21的距離，此外，光 學式近接偵測器施還包括其他用來固紐光單元％及光偵 測單元27的基板以及封裝結構，皆於第2A圖中省略。 繼續參考第2A圖’在-實施例中，光線阻斷機構23的寬 度w與透光板21的厚度τ之間具有特定的關係，寬度w的 範圍較佳地例如0.35T<W<2T，然不限於此，也就是說，當透 光板21的厚度τ改變，光線阻斷機構23的寬度w亦需跟著 改變。發光單元25鄰近於#二侧面S2，且位於光線阻斷機構 23的一側，發光單元25用以朝向第二侧面&發射一光束，該 光束的有效發射肖度ΘΕ由發光單元25到透光板μ的垂直距 離ν以及發光單元25到光線阻斷機構23的水平距離h的比例 所決定，即tan0E=h/V，有效發射角度Θε的範圍較佳地例如 ，然不限於此，即發射光Iu的角度介於有效發射 角度ΘΕ之間時’皆可有效地從透光板21的第二側面&經折射 至第一側面S!，並經由反射及折射至光偵測單元27。 光偵測單元27用以偵測具有與發射光l相同波長的反射 光，且對應於有效發射角度Θε，光偵測單元27具有—有效偵 剛角度θβ’有效偵測角度θκ由光偵測單元27到透光板21的垂 M434221 直距離V以及光偵測單元27到光線阻斷機構23的水平距離 h’的比例所決定’即耐㈣以，，即反射光&的角度介於有效 價測角度⑷之啊皆可抵達絲測單元27。频地來說，有 效偵測角度eR亦與光偵測單元27相對於光線阻斷機構23及透 光板21的位置有關。 在一實施例中，透光板21的材質可為玻璃、塑膠或其他 可透光材質’其折射率n的範圍較佳地介於13〜17之間，然 不限於此。光線阻斷機構23的材質可為不透光材質、吸光材 處或不透光材質及吸光材質的組合，例如黑色墨水或不透明的 樹脂等。具體地來說’光線阻斷機構23是附著於透光板21的 第二侧面S2上，並在發光單元25與光偵測單元27之間形成 光線阻隔。 藉由上述的設計與安排，透光板21的第一側面&具有一 有效接觸區域C’即當物體極接近或貼近此有效接觸區域c内 的透光板21時，皆可有效地被光偵測單元27所偵測。有效接 觸區域C的寬度Wc可由有效發射角度Θε及有效接收角度仏 決定，具體地來說，有效接觸區域C的一邊界可由有效發射 角度ΘΕ的最大值決定，而另一邊界可由有效偵測角度的最 大值決定。如第2A圖所示，當發射光Iu的角度為有效發射角 度ΘΕ的最大值時，該發射光Iu進入透光板21後的折射光 大體上可定義出有效接觸區域c的一邊界，而從第一側面Si 反射至第二侧面S2的反射光中，可於透光板21外折射出反射 角度為最大有效偵測角度0R的反射光凡2可大體上定義出有效 接觸區域C的另一邊界。在一實施例中，有效接觸區域c的 寬度wc介於透光板21的厚度T的0.3倍至1.5倍之間，當透 光板21的厚度τ改變，有效區域C的寬度Wc亦隨著改變。 在一實施例中，發光單元25包括一個或多個發光元件， 其中發光元件可為發光二極體(light emitting diode，LED)、有機 發光一極體(organic light emitting diode, OLED)、整體發射型 LED、表面發射型LED、垂直腔穴表面發射型雷射 (vertical-cavity surface-emitting laser, VCSEL)、超明亮發光二極 體(superluminescent light emitting diode，SLED)、雷射二極體、 像素一極體或類似者其中之一或組合，可發出可見光波段或紅 外光波段的發射光1„。 在一實施例中，光偵測單元27可包括一個或多個光偵測 元件，光偵測元件可為互補型金屬氧化物半導(c〇mplememary metal_Qxide_SemieGnductol·，CMOS)、光電阻器、光伏電池、光 二極體、光電晶體、電荷耦合元件(charge_c〇upled ―⑶，CCD) 或類似者其巾之-或組合，用以接收反射光&，並產生指示 反射光Rntfl號強度大小的電流或電壓，以觀處理^或電路 判斷物體是否接近。 接著，明參考第2B圖，其顯示本創作光學式近接偵測器 的第二實施例之示意圖。如帛2B圖所示，光學式近接侧器 篇與第-實施例的光學式近接侧器施大致相同，兩者的 差異在於，光學式近接偵測器20b還包括一導光元件29，設 置於透光板21的第二側面s2與光偵測單元27之間，較佳地 實施方式為’導光元件29的兩側分別緊鄰或緊貼於透光板21 的第二侧面S2及光偵測單元27。 導光元件29用以將透光板21中鄰近於導光元件29的反 射光導向光偵測單元27，換句話說，從透光板21的第二側面 S2發射的反射光大部分將進入導光元件29 ,進入導光元件29 後經過多次全反射後將全部輸出至光偵測單元27，藉此增強 了反射光被光偵測單元27接收的效率。在一實施例中，導光 疋件29可由擴散元件(diffuser)取代，或是由導光元件及擴散 元件的組合來取代，其寬度約小於或等於光偵測單元27的寬 度。 接著’參考第2C圖’其顯示本創作光學式近接偵測器的 訊號強度-距離特性圖。本圖說明了光學式近接偵測器2〇a或 光學式近接侧器2Gb的光偵測單^ 27接收反射光的訊號強 度與距離_係’其中X軸的輯是以倒數表示，由左到右表 示物體由遠端繼近透光板21。如第2C圖所*，當物體在遠 端時’反射光的訊號強度Ml接近或等㈣，當物體逐漸靠近 透光板21 ’直到超過-個預設轉m時，反射光的訊號強度 開始隨著麟的變小而逐漸增強，當物體緊鄰甚至完全貼近 時，反射光的訊號強度迅速降至。 值得注意的是’由於貼近時的訊號強度峰大於遠離時的 M434221 訊號強度Ml，因此，處職或電路可根據光_單元27職 測的反射光賴號強絲酬出物體仍靠近透級Μ而不會 誤判為遠離透光板2卜也就是說，訊號強度％相較於訊號強 度％具有-定的差異’此差異足以讓處理器或電路判斷物體 姆於透絲21的遠近，舉触說處理賊電關斷反射光 •的訊號強度大於Μ,時’皆判斷為緊鄰或完全貼近。 ·«後’請參考m其顯示摘作光學式近接侧器的 • 光線阻斷機構的實施例之俯視圖。帛3(aHd)圖顯示光學式近 接偵測II 2〇a或光學式近接侧器勘的光線阻斷機構23的 不同實施例之俯視圖，分別具有兩個透光區域，其位置分麟 應到發光單元25及光侧單元27，且大小可相同或相異。如 第3⑻圖所示，光線阻斷機構33a具有圓形或擴圓形的透光區 域3(Π、302。如第3(b)圖所示，光線阻斷機構视具有矩形 的透光區域303、304。如第3⑹圖所示，光線阻斷機構说 # 具有六角形的透光區域305、306。如第3(d)圖所示，光線阻 斷機構33d具有單-矩形透光區域3〇7，且透光區域3〇7中設 置有-光學崎器308(optical blocker)，光學阻斷II 3〇8將透 光區域307分割為兩個區域，並阻擔發光單元25的發射光未 經折射即進入光偵測單元27。 是故’由上述可以得知，本創作光學式近接镇測器可解決 物體極接近或貼近時的誤判問題，藉由設計光線阻斷機構、發 光單元以及光偵測單元的相對位置及大小，以控制發光單元以 及光侧單元的可勘，藉此提高光學式近接偵測器的可靠 度。 η以上敍述依據本創作多個不同實施例，其中各項特徵可以 早一或不同結合方式實施。因此，本創作實施方式之揭露為闡 月本創作原則之具體實施例，應不拘限本創作於所揭示的實施 例。進-步言之，先前敍述及其附圖僅為本創作示範之用，並 不受其限囿。其他元件之變化或組合皆可能，且不悻于本創作 之精神與範圍。 【圖式簡單說明】 第囷”、、員示▲知光學式近接偵測器的一實施例之示意圖。 第1Β圖顯不習知光學式近接该測器的訊號強度-距離特性 圖。 第2Α圖顯示本創作光學式近接翻器的第一實施例之示 意圖。 第2Β圖顯不本創作光學式近接侧器的第二實施例之示 意圖。 第2C圖顯7R本創作光學式近接侧器的訊號強度-距離特 性圖。 第3醜7R本創作光學式近接制胃的光雜斷機構的實 施例之俯視圖。 M434221 【主要元件符號說明】 10光學式近接偵測器 11透光板 13光線阻斷機構 15發光元件 17光偵測元件 50物體 d、d!、d2、d3距離發射光 ii、i2發射光 ri、r2反射光 Θ!有效發射角度 02有效接收角度 20a、20b光學式近接偵測器 21透光板 23光線阻斷機構 25發光單元 27光偵測單元 29導光元件 Si第一側面 S2第二側面 T厚度 W寬度 13 M434221M434221 » V. New description: [New technical field] . This creation is about a sensor, especially an optical non-contact proximity detector. - [Prior Art] . The glimpse of the object is close to the wire. The wire is close to the _ device has been widely used. For example, with the progress of battery-operated handheld devices (such as mobile phones), these feelings The value of the detector has recently become more important. For example, the optical proximity proximity side device is present with side objects, such as sensing mechanical protection. When the vine cover is open, the paper has been placed on the printer, or the operator's hand is close to the machine of the towel. The optical proximity detector can also be used as a simple touch or proximity touch switch, as shown in Figure 1A, the general optical proximity detector 10 includes a light transmissive plate, - light The blocking mechanism 13, a light-emitting element 15 and a light detecting element 17 ° when the object 50 is close to the optical proximity splicer 10, the light beam emitted by the illuminating element 15 is in particular emitted at an angle smaller than the effective emission angle 仏It will be reflected by the object 50. The effective emission angle θ| is determined by the relative positions of the light-emitting and breaking mechanism 13, the light-emitting element 15 and the light detecting element 17, and the emitted light h larger than the effective emission angle 0. Then, it is blocked by the light blocking mechanism 13. The light detecting component 17 can detect the reflected light from the object 5〇. Similarly, the light detecting component 17 has an effective receiving angle 仏, and the light detecting component Η can only receive the reflection angle of 3 degrees less than the effective receiving angle θ2 (ie, The reflected light η of the viewable angle; and the reflected light r2 having a reflection angle larger than the effective reception angle θ2 is blocked by the light blocking mechanism 13. The optical proximity detector 1 estimates the distance d between the object 50 and the light-transmitting plate 11 by the intensity of the reflected light detected by the light detecting element 17, as shown in FIG. 1B. When the distance from the light-transmitting plate 11 to the distance from the light-transmitting plate 11 is small, the intensity of the reflected light changes, and as the distance decreases, the signal intensity gradually increases. However, when the object 50 is at the very proximal end from the light-transmitting plate 11, for example, the distance from the mountain is equal to 5 mm or close to zero, since the light is at a fixed angle of view, the path of the reflected light is mostly blocked by the object 5 Blocked or absorbed by the light blocking mechanism 13, so that the optical proximity detector 10 receives a small amount of reflected light (ie, the light sfU tiger intensity is small), especially when the object 5 is dark, such as black hair. Or black skin, etc. In this way, the optical proximity detector 10 misjudges that the object 5 is at the far end state, thereby generating an erroneous state report and causing a malfunction. Therefore, it is necessary to improve the problem that existing near-end detection technology will produce misjudgment. [New content] In order to solve the above problems, the purpose of the present invention is to provide an optical proximity detector, which adjusts the position of the light-emitting unit and the light detecting unit, and designs the light resistance to turn A small, width and shape. To control the effective angle of the light unit and the view angle of the optical gamma unit. In this way, the optical crosstalk and the near-end side b-tA can be simultaneously satisfied, so that the object can be detected even when the object is close to the detector. According to an embodiment of the present invention, an optical proximity detector is provided, including a light transmissive plate, a light blocking mechanism, a light emitting unit, and a light detecting unit. The side light-transmitting plate has a first side surface and a second side surface, the first side surface and the second side surface are parallel to each other and define a thickness of the light-transmitting plate; the light blocking mechanism is disposed on the second side surface, The light blocking mechanism has a width of between 0.35 and 2 times the thickness; the light emitting unit is adjacent to the second side, and is located at the side of the light blocking mechanism. Side emission - a light beam having an effective emission angle between 15 degrees and 60 degrees; and the light detecting unit is adjacent to the second side and located on the other side of the light blocking mechanism, the light side unit The rib side has reflected light with the wavelength of the silk, and the light thin unit has an effective side angle, whereby the signal intensity of the side of the wire side unit can be greater than when the object is in close proximity to or close to the light transmitting plate The signal strength of the reflected light when the far object is far away. Therefore, as can be seen from the above, this creation can solve the sin of the general optical proximity detector for the error of the near-end object and the recording of the high-speed proximity detector. At the same time, there is no need to be limited by the limitations of conventional mechanisms, so that the thickness of external components (such as light-transmitting glass components, etc.) coated on the detector can be made thinner and thinner. [Embodiment] For the purpose of further explaining the embodiments, the creation is provided with a drawing. These drawings are part of the creation of the road, and the main side is to illustrate the embodiment, and can cooperate with the description of the book to explain the operation of the embodiment. With reference to these contents, the general knowledge of the field can be transferred to other (10) implementation methods and the creation of this creation. The component counts are sequential, and similar component symbols are often used to indicate similar components. Referring first to Figure 2A, there is shown a schematic view of a first embodiment of an optical proximity detector according to the present invention. As shown in Fig. 2A, the optical proximity detector 20a includes a light transmissive plate 21, a light blocking mechanism, a light emitting unit, and a light side single το27. The light-emitting mechanism a, the light-emitting unit μ, and the light-side unit 27 are all located on the same side of the light-transmitting plate 21. Specifically, the light transmissive plate 21 has a first side S1 and a second side S2, wherein the first side S1 and the second s2 are parallel to each other and define a thickness τ of the light transmissive plate 2i. The light blocking mechanism 23 is disposed in the second gamma sag and the light unit 27 (4) is adjacent to the second side & and the light emitting unit μ and the light detecting unit 27 are respectively located in the two phases of the light blocking mechanism 23 Irregular. The optical proximity device 2〇a can be installed in a personal digital assistant (pDA), a mobile phone and a tablet computer, etc., for side external objects (not shown), such as a human face, a human ear, etc. The proximity of an object close to the electronic device, thereby controlling the functional switching of the electronic device. The technique of the present invention is not based on designing the thickness τ of the transmissive 21 and the material characteristics, and the width w of the light ray mechanism 23 to control the viewing angle of the light-emitting unit and the light detecting unit 27. Or close to the light-transmitting plate 21. It should be understood by those skilled in the art that Figure 2a only shows the solitary portion of the optical proximity detector, and the optical proximity detector also includes a processor or circuit (not shown), such as logic. The circuit is connected to the light detecting unit 27, and the processing circuit or circuit calculates the distance between the object and the light transmitting plate 21 according to the intensity of the light signal detected by the wire measuring unit 2, and the optical proximity detector Also included are other substrates and package structures for the photocell unit and the photodetecting unit 27, which are omitted in FIG. 2A. Continuing to refer to the second embodiment, in the embodiment, the width w of the light blocking mechanism 23 has a specific relationship with the thickness τ of the light-transmitting plate 21, and the width w is preferably, for example, 0.35 T < W < 2T, However, it is not limited thereto, that is, when the thickness τ of the light-transmitting plate 21 is changed, the width w of the light-blocking mechanism 23 also needs to be changed. The light emitting unit 25 is adjacent to the #2 side surface S2 and is located at one side of the light blocking mechanism 23. The light emitting unit 25 is configured to emit a light beam toward the second side surface. The effective emission angle ΘΕ of the light beam is transparent to the light emitting unit 25 The vertical distance ν of the light plate μ and the ratio of the horizontal distance h of the light-emitting unit 25 to the light blocking mechanism 23 are determined, that is, tan0E=h/V, and the range of the effective emission angle Θε is preferably, for example, not limited thereto, that is, When the angle of the emitted light Iu is between the effective emission angles ', it can be effectively refracted from the second side & of the light-transmitting plate 21 to the first side S!, and is reflected and refracted to the light detecting unit 27 . The light detecting unit 27 is configured to detect the reflected light having the same wavelength as the emitted light 1 and corresponds to the effective emission angle Θ ε, and the light detecting unit 27 has an effective detecting angle θβ′ effective detecting angle θ κ by the light detecting The ratio of the unit 27 to the vertical distance V of the light-transmitting plate 21 and the horizontal distance h' of the light detecting unit 27 to the light-blocking mechanism 23 is determined to be "four", that is, the angle of the reflected light & The wire measuring unit 27 can be reached by the effective price measuring angle (4). In particular, the effective detection angle eR is also related to the position of the light detecting unit 27 with respect to the light blocking mechanism 23 and the light transmitting plate 21. In one embodiment, the material of the light-transmitting plate 21 may be glass, plastic or other permeable material. The refractive index n is preferably in the range of 13 to 17, but is not limited thereto. The material of the light blocking mechanism 23 may be a combination of an opaque material, a light absorbing material, or an opaque material and a light absorbing material, such as black ink or opaque resin. Specifically, the light blocking mechanism 23 is attached to the second side surface S2 of the light-transmitting plate 21, and forms a light blocking between the light-emitting unit 25 and the light detecting unit 27. With the above design and arrangement, the first side surface & of the light-transmitting plate 21 has an effective contact area C', that is, when the object is in close proximity or close to the light-transmitting plate 21 in the effective contact area c, it can be effectively The light detecting unit 27 detects. The width Wc of the effective contact area C can be determined by the effective emission angle Θ ε and the effective reception angle ,. Specifically, one boundary of the effective contact area C can be determined by the maximum value of the effective emission angle ΘΕ, and the other boundary can be effectively detected. The maximum value is determined. As shown in FIG. 2A, when the angle of the emitted light Iu is the maximum value of the effective emission angle ΘΕ, the refracted light of the emitted light Iu entering the light-transmitting plate 21 can substantially define a boundary of the effective contact region c, and In the reflected light reflected from the first side Si to the second side surface S2, the reflected light having the reflection angle of the maximum effective detection angle 0R can be refracted outside the light-transmitting plate 21, and the effective contact area C can be substantially defined. a boundary. In an embodiment, the width wc of the effective contact region c is between 0.3 and 1.5 times the thickness T of the light-transmitting plate 21, and when the thickness τ of the light-transmitting plate 21 is changed, the width Wc of the effective region C is also change. In an embodiment, the light emitting unit 25 includes one or more light emitting elements, wherein the light emitting elements can be light emitting diodes (LEDs), organic light emitting diodes (OLEDs), and overall emission. LED, surface emitting LED, vertical-cavity surface-emitting laser (VCSEL), superluminescent light emitting diode (SLED), laser diode, pixel One or a combination of one or the other may emit light in the visible light band or the infrared light band. In an embodiment, the light detecting unit 27 may include one or more light detecting elements, and light detecting The measuring component can be a complementary metal oxide semiconductor (c〇mplememary metal_Qxide_SemieGnductol·, CMOS), a photo resistor, a photovoltaic cell, a photodiode, a phototransistor, a charge coupled device (charge_c〇upled-(3), CCD) or the like. a towel-or combination thereof for receiving reflected light & and generating a current or voltage indicative of the intensity of the reflected light Rntfl number, to determine the object or circuit to determine the object Referring to Figure 2B, there is shown a schematic view of a second embodiment of the present optical proximity detector. As shown in Figure 2B, the optical proximity device and the optical embodiment of the first embodiment The proximity of the proximity device is substantially the same, and the difference between the two is that the optical proximity detector 20b further includes a light guiding component 29 disposed between the second side s2 of the light transmitting plate 21 and the light detecting unit 27, preferably The two sides of the light guiding element 29 are respectively adjacent to or in close contact with the second side surface S2 of the light transmissive plate 21 and the light detecting unit 27. The light guiding element 29 is used to guide the light transmitting plate 21 adjacent to the light guiding plate 21 The reflected light of the element 29 is guided to the light detecting unit 27, in other words, most of the reflected light emitted from the second side surface S2 of the light-transmitting plate 21 will enter the light guiding element 29, and after a total number of total reflections after entering the light guiding element 29 All are output to the photodetecting unit 27, thereby enhancing the efficiency with which the reflected light is received by the photodetecting unit 27. In one embodiment, the light guiding member 29 can be replaced by a diffuser or by a light guide. a combination of components and diffusion elements, the width of which is less than or equal to The width of the light detecting unit 27 is followed by 'refer to FIG. 2C', which shows the signal intensity-distance characteristic diagram of the optical proximity detector. This figure illustrates the optical proximity detector 2〇a or optical The light detecting unit 27 of the proximity side 2Gb receives the signal intensity and distance of the reflected light. The sequence of the X-axis is represented by a reciprocal, and the object from the left to the right indicates that the object is adjacent to the light-transmitting plate 21 by the distal end. As shown in Fig. 2C, when the object is at the far end, the signal intensity M1 of the reflected light is close to or equal to (4), and when the object gradually approaches the translucent plate 21' until it exceeds a preset rotation m, the signal intensity of the reflected light begins. As the lin becomes smaller, it gradually increases. When the object is in close proximity or even close, the signal intensity of the reflected light drops rapidly. It is worth noting that 'because the signal intensity peak when it is close is greater than the M434221 signal strength Ml when it is far away, therefore, the service or circuit can be based on the light reflection of the light_unit 27, and the object is still close to the transparent level. The difference between the signal strength % and the signal strength % has a certain difference. It is said that when the signal strength of the thief-powered off-reflected light is greater than Μ, it is judged to be in close proximity or completely close. - "After", please refer to the top view of the embodiment of the light blocking mechanism which is shown as an optical proximity side. The 帛3 (aHd) diagram shows a top view of different embodiments of the optical proximity detection II 2〇a or the optical proximity detector 23, each having two light transmissive regions, the position of which is The light emitting unit 25 and the light side unit 27 may be the same size or different in size. As shown in FIG. 3(8), the light blocking mechanism 33a has a circular or rounded light-transmissive region 3 (Π, 302. As shown in FIG. 3(b), the light blocking mechanism has a rectangular transparent region. 303, 304. As shown in Fig. 3(6), the light blocking mechanism says that there are hexagonal transparent regions 305, 306. As shown in Fig. 3(d), the light blocking mechanism 33d has a single-rectangular light transmitting region. 3〇7, and an optical blocker 308 is disposed in the light-transmitting region 3〇7, and the optical blocking II 3〇8 divides the light-transmitting region 307 into two regions and blocks the emission of the light-emitting unit 25. The light enters the light detecting unit 27 without being refracted. Therefore, it can be known from the above that the optical proximity sensor can solve the problem of misjudgment when the object is very close or close, by designing the light blocking mechanism and emitting light. The relative position and size of the unit and the light detecting unit are controlled to control the illuminating unit and the light side unit, thereby improving the reliability of the optical proximity detector. η The above description is based on a plurality of different embodiments of the present invention, wherein The features can be implemented as early or different combinations. The disclosure of the present embodiment is a specific embodiment of the principle of creating a moon, and the present invention should not be limited to the disclosed embodiments. The foregoing description and the accompanying drawings are only for the purpose of the present invention, and It is not limited to it. Changes or combinations of other components are possible, and are not inconsistent with the spirit and scope of this creation. [Simple description of the diagram] Dimensional,,,,,,,,,,,,,,,,,,,,,,,, A schematic diagram of an example. The first diagram shows the signal intensity-distance characteristic diagram of the optical proximity sensor. The second diagram shows a schematic diagram of the first embodiment of the optical proximity switch of the present invention. A schematic diagram of a second embodiment of the optical proximity device is provided. The 2C figure shows the signal intensity-distance characteristic diagram of the optical proximity device of the present invention. The 3rd ugly 7R optically adjacent optically-disconnected mechanism Top view of the embodiment. M434221 [Description of main component symbols] 10 optical proximity detector 11 transparent plate 13 light blocking mechanism 15 light-emitting element 17 light detecting element 50 object d, d!, d2, d3 distance emitted light Ii, i2 hair Light ri, r2 reflected light 有效 effective emission angle 02 effective receiving angle 20a, 20b optical proximity detector 21 light transmitting plate 23 light blocking mechanism 25 light emitting unit 27 light detecting unit 29 light guiding element Si first side S2 Second side T thickness W width 13 M434221
Wc有效接觸區域 η折射率 Iu、112發射光 Ru、Rl2反射光 ΘΕ有效發射角度 有效接收角度 V、V'垂直距離 h、h'水平距離 Mi、M2訊號強度 D!、D2距離Wc effective contact area η refractive index Iu, 112 emitted light Ru, Rl2 reflected light ΘΕ effective emission angle effective receiving angle V, V' vertical distance h, h' horizontal distance Mi, M2 signal intensity D!, D2 distance