TWI394070B - Optical device - Google Patents
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- TWI394070B TWI394070B TW98124750A TW98124750A TWI394070B TW I394070 B TWI394070 B TW I394070B TW 98124750 A TW98124750 A TW 98124750A TW 98124750 A TW98124750 A TW 98124750A TW I394070 B TWI394070 B TW I394070B
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Description
本發明是有關於一種光學裝置，且特別是有關於一種偵測一物件位置的光學偵測裝置。The present invention relates to an optical device, and more particularly to an optical detecting device for detecting the position of an object.
隨著電腦科技、可攜式電子產品以及平面顯示器的蓬勃發展，觸控輸入或手寫輸入技術的需求也日益受到重視。With the rapid development of computer technology, portable electronic products and flat panel displays, the demand for touch input or handwriting input technology has also received increasing attention.
傳統的觸控技術包括多種不同類型，其中一類為電阻式或電容式觸控螢幕。電阻式或電容式觸控技術是在顯示器的顯示面上方設置兩層彼此分離的薄層，兩薄層內側塗佈有導電物質。當一物件壓觸外部的薄層並使兩薄層相接觸時，藉由計算兩薄層電阻或電容的變化而得出接觸點的位置。但上述電阻式或電容式觸控技術會造成螢幕之光線穿透率降低且耐久性不佳。Traditional touch technologies include many different types, one of which is a resistive or capacitive touch screen. The resistive or capacitive touch technology is to provide two layers separated from each other above the display surface of the display, and the inner sides of the two thin layers are coated with a conductive material. When an object is pressed against the outer thin layer and the two thin layers are brought into contact, the position of the contact point is obtained by calculating the change in the resistance or capacitance of the two thin layers. However, the above-mentioned resistive or capacitive touch technology causes a decrease in light transmittance and poor durability of the screen.
第二種常用的觸控技術是利用紅外線感應觸控螢幕。紅外線感應觸控螢幕技術是在顯示器的顯示面四週設置複數個紅外線發光源以及複數個相對應的紅外線接收器，且紅外線發光源與紅外線接收器是一對一的關係。當一物件出現在顯示器的顯示面時，此物件遮蔽對應位置上的紅外線接收器的光線，藉由分析複數紅外線接收器的光線而決定此物件的位置。但傳統的紅外線觸控技術，紅外線發光源與紅外線接收器是相對配置，若要得到較佳的解析度，必須同時設置更多的紅外線發光源與接收器。因此，在需要高解析度的觸控螢幕中，傳統的紅外線感應觸技術受到很大限制。The second commonly used touch technology utilizes an infrared-sensitive touch screen. Infrared sensing touch screen technology is to arrange a plurality of infrared light sources and a plurality of corresponding infrared receivers around the display surface of the display, and the infrared light source and the infrared receiver are in a one-to-one relationship. When an object appears on the display surface of the display, the object shields the light of the infrared receiver at the corresponding position, and the position of the object is determined by analyzing the light of the plurality of infrared receivers. However, the traditional infrared touch technology, the infrared light source and the infrared receiver are oppositely arranged. To obtain better resolution, more infrared light source and receiver must be set at the same time. Therefore, in the touch screen requiring high resolution, the conventional infrared sensing touch technology is greatly limited.
本發明之一態樣係提供一種光學裝置，俾能偵測一物件之位置，且具微型化之優點。此光學裝置包含一雷射二極體、一準直鏡片、一第一光學透鏡、一第二光學透鏡以及一感測元件。雷射二極體係用以發射一紅外光。準直鏡片配置成可接收並轉換該紅外光為一準直光束。第一光學透鏡配置成可接收並轉換該準直光束為一平面光，上述雷射二極體、準直鏡片與第一光學透鏡係位在同一光徑上。第二光學透鏡，配置在與該第一光學透鏡平行處，用以接收經一物件反射之該平面光。感測元件配置成可接收並偵測經由該第二光學透鏡投射至該感測元件上之該反射平面光。One aspect of the present invention provides an optical device that detects the position of an object and has the advantage of miniaturization. The optical device includes a laser diode, a collimating lens, a first optical lens, a second optical lens, and a sensing element. The laser diode system is used to emit an infrared light. The collimating lens is configured to receive and convert the infrared light into a collimated beam. The first optical lens is configured to receive and convert the collimated beam into a planar light, and the laser diode and the collimating lens are in the same optical path as the first optical lens. a second optical lens disposed parallel to the first optical lens for receiving the planar light reflected by an object. The sensing element is configured to receive and detect the reflected planar light projected onto the sensing element via the second optical lens.
根據本發明一實施例，上述之光學裝置更包括有一基座，此基座包含一發射腔、一感測腔以及一阻隔壁，且該發射腔與該感測腔共用該阻隔壁；其中該準直鏡片及該第一光學透鏡配置在該發射腔中，且該第二光學透鏡及該感測元件配置在該感測腔中。According to an embodiment of the invention, the optical device further includes a base, the base includes a transmitting cavity, a sensing cavity and a blocking wall, and the transmitting cavity shares the blocking wall with the sensing cavity; The collimating lens and the first optical lens are disposed in the emitting cavity, and the second optical lens and the sensing component are disposed in the sensing cavity.
根據本發明另一實施例，上述之光學裝置更包括有一濾光元件，配置於該第二光學透鏡與該感測元件之間。According to another embodiment of the present invention, the optical device further includes a filter element disposed between the second optical lens and the sensing element.
根據本發明又一實施例，上述之光學裝置更包括有一導光元件，配置於該光徑上介於該雷射二極體與該準直鏡片之間，以將該紅外光反射向該準直鏡片。According to still another embodiment of the present invention, the optical device further includes a light guiding element disposed between the laser diode and the collimating lens on the optical path to reflect the infrared light toward the standard Straight lens.
由上述本發明實施方式可知，將光源、感測元件及各光學鏡組整合在一模組中，能使上述之光學裝置應用在各種領域，例如應用於觸控面板。再者，本揭露之光學裝置具有較小的體積，非常適合應用在各種可攜式的電子產品中。It can be seen from the above embodiments of the present invention that the light source, the sensing component and the optical mirrors are integrated into one module, so that the optical device described above can be applied to various fields, for example, to a touch panel. Furthermore, the optical device of the present disclosure has a small volume and is well suited for use in a variety of portable electronic products.
請參照第1圖及第2圖，第1圖為本發明一實施方式之光學裝置的分解圖，第2圖為本發明一實施方式之光學裝置的立體圖。光學裝置100主要包括雷射二極體110、準直鏡片120、第一光學透鏡130、第二光學透鏡140、以及感測元件150。1 and 2, FIG. 1 is an exploded view of an optical device according to an embodiment of the present invention, and FIG. 2 is a perspective view of an optical device according to an embodiment of the present invention. The optical device 100 mainly includes a laser diode 110, a collimating lens 120, a first optical lens 130, a second optical lens 140, and a sensing element 150.
雷射二極體110用以發射一紅外光。在一實施例中，雷射二極體110所發射之紅外光的波長介於約780奈米至約850奈米之間；例如，可為波長780、808或850奈米的紅外光。在其他實施例中，雷射二極體110可為一法布里-伯羅水平共振腔雷射二極體(Fabry-Perot horizontal cavity laser diode)、垂直共振腔雷射二極體或其他種類的雷射二極體。The laser diode 110 is used to emit an infrared light. In one embodiment, the infrared light emitted by the laser diode 110 has a wavelength between about 780 nanometers and about 850 nanometers; for example, infrared light having a wavelength of 780, 808, or 850 nanometers. In other embodiments, the laser diode 110 can be a Fabry-Perot horizontal cavity laser diode, a vertical cavity laser diode, or other types. Laser diode.
準直鏡片120配置成可接收射二極體110所發射之紅外光，且將此紅外光轉換為一準直光束。在一實施例中，雷射二極體110所發射出之紅外光為具有一發散角度的非平行光束。此非平行的紅外光束穿透準直鏡片120後，可轉變為一具有高指向性的準直光束，並由準直鏡片120之一側發射出此準直光束。The collimating lens 120 is configured to receive the infrared light emitted by the emitter diode 110 and convert the infrared light into a collimated beam. In one embodiment, the infrared light emitted by the laser diode 110 is a non-parallel beam having a divergence angle. After the non-parallel infrared beam passes through the collimating lens 120, it can be converted into a collimated beam having high directivity, and the collimated beam is emitted from one side of the collimating lens 120.
在一特定實施例中，光學裝置100包括有一導光元件180，用以將將雷射二極體110所發射的紅外光引導向準直鏡片120。在一實施例中，導光元件180配置於雷射二極體110與準直鏡片120之間的光學路徑上，而引導紅外光指向準直鏡片120。在一實施例中，導光元件180為一反射鏡，例如可為一鍍銀反射鏡、鍍汞反射鏡、鍍鋁反射鏡或鍍鉻反射層鏡。在其他實施例中，導光元件180可為一菱鏡組或一光纖束。In a particular embodiment, optical device 100 includes a light directing element 180 for directing infrared light emitted by laser diode 110 toward collimating lens 120. In one embodiment, the light guiding element 180 is disposed on the optical path between the laser diode 110 and the collimating lens 120 to direct the infrared light to the collimating lens 120. In one embodiment, the light guiding element 180 is a mirror, such as a silver plated mirror, a mercury plated mirror, an aluminized mirror, or a chrome plated mirror. In other embodiments, the light guiding element 180 can be a prism group or a bundle of fibers.
請參照第3圖，其為本發明一實施例之光學路徑示意圖。第一光學透鏡130配置成可接收準直光束122，並將準直光束122轉換為一平面光134(sheet of light)。且雷射二極體110、準直鏡片120與第一光學透鏡130係位在同一光徑(optical path)上。在一實施例中，第一光學透鏡130為一線光源鏡片例如一柱狀鏡片或波浪鏡，且配置於準直鏡片120之一側。當準直光束122穿透第一光學透鏡130後，準直光束122轉變為一平面光134，並由第一光學透鏡130之出光面132發射出平面光134。如第3圖所示，在一實施例中，此平面光134具有一大於90度的平面發散角θ。例如，平面發散角θ可為約100度、約120度、約140度或約160度。Please refer to FIG. 3, which is a schematic diagram of an optical path according to an embodiment of the present invention. The first optical lens 130 is configured to receive the collimated beam 122 and convert the collimated beam 122 into a sheet of light 134. The laser diode 110 and the collimating lens 120 are aligned with the first optical lens 130 on the same optical path. In one embodiment, the first optical lens 130 is a line source lens such as a cylindrical lens or a wave mirror, and is disposed on one side of the collimating lens 120. When the collimated beam 122 penetrates the first optical lens 130, the collimated beam 122 is converted into a planar light 134, and the planar light 134 is emitted by the light exit surface 132 of the first optical lens 130. As shown in FIG. 3, in one embodiment, the planar light 134 has a plane divergence angle θ greater than 90 degrees. For example, the plane divergence angle θ can be about 100 degrees, about 120 degrees, about 140 degrees, or about 160 degrees.
第二光學透鏡140配置在與第一光學透鏡130大致平行之處，用以接收經一物件190反射之反射光。如第3圖所示，當一物件190出現在平面光134涵蓋的範圍內時，平面光134照射到物件190，物件190表面將會反射平面光134。經物件190反射後的平面光136可進入第二光學透鏡140，最後成像在感測元件150上。在一實施例中，第二光學透鏡140為一成像鏡頭。在另一實施例中，第二光學透鏡140為一廣角鏡，且具有一收光角度α為大於約90度。例如，收光角度α可為90度、100度、120度或140度。The second optical lens 140 is disposed substantially parallel to the first optical lens 130 for receiving reflected light reflected by an object 190. As shown in FIG. 3, when an object 190 appears within the range covered by the planar light 134, the planar light 134 illuminates the object 190, and the surface of the object 190 will reflect the planar light 134. The planar light 136 reflected by the object 190 can enter the second optical lens 140 and be finally imaged on the sensing element 150. In an embodiment, the second optical lens 140 is an imaging lens. In another embodiment, the second optical lens 140 is a wide-angle lens and has a light-receiving angle α greater than about 90 degrees. For example, the light collecting angle α may be 90 degrees, 100 degrees, 120 degrees, or 140 degrees.
感測元件150配置成可接收並偵測經由第二光學透鏡140投射至感測元件150上的反射平面光136。請參照第3圖，第二光學透鏡140將由物件190反射的平面光投射至感測元件150，並在感測元件150上成像。當物件190處在不同位置時，由物件190反射之平面光136將投射到感測元件150的不同位置。藉由分析感測元件150所偵測到的訊號，可估算物件190的位置。在一實施例中，感測元件150的感測面156垂直於第二光學透鏡140的光軸A(optical axis)。請再參照第1圖，在一實施例中，感測元件150包括感測器陣列152以及電路板154。感測器陣列152與電路板154電性連接，並經由電路板154將感測器陣列152所偵測到的訊號傳送到一外部電路進行分析。在又一實施例中，感測元件150的控制電路、訊號傳輸電路以及訊號分析電路整合在電路板154中。在其他實施例中，感測器陣列152可包括一接觸式影像感測器、一互補式金屬氧半導體線性光感測器、或一線性電荷耦合光感測器。The sensing element 150 is configured to receive and detect reflective planar light 136 that is projected onto the sensing element 150 via the second optical lens 140. Referring to FIG. 3, the second optical lens 140 projects planar light reflected by the object 190 onto the sensing element 150 and images the sensing element 150. When the object 190 is in a different position, the planar light 136 reflected by the object 190 will be projected to different locations of the sensing element 150. The position of the object 190 can be estimated by analyzing the signal detected by the sensing element 150. In an embodiment, the sensing surface 156 of the sensing element 150 is perpendicular to the optical axis A of the second optical lens 140. Referring again to FIG. 1 , in an embodiment, the sensing component 150 includes a sensor array 152 and a circuit board 154 . The sensor array 152 is electrically connected to the circuit board 154, and transmits the signal detected by the sensor array 152 to an external circuit for analysis via the circuit board 154. In yet another embodiment, the control circuit, the signal transmission circuit, and the signal analysis circuit of the sensing component 150 are integrated in the circuit board 154. In other embodiments, the sensor array 152 can include a contact image sensor, a complementary metal oxide semiconductor linear light sensor, or a linear charge coupled light sensor.
請再參照第2圖，在一特定實施例中，光學裝置100包括有基座160。基座T60包含第一側壁165、第二側壁167以及阻隔壁166。第一側壁165與阻隔壁166之間形成發射腔162，第二側壁167與阻隔壁166之間形成感測腔164。發射腔162與感測腔164共用阻隔壁166。準直鏡片120及第一光學透鏡130配置在發射腔164中，而第二光學透鏡140及感測元件150配置在感測腔164中。阻隔壁166將發射腔162的光學元件(例如，準直鏡片120及第一光學透鏡130)與感測腔164的光學元件(例如，第二光學透鏡140及感測元件150)隔離，以避免感測元件150受其他光學元件的干擾。再者，發射腔162與感測腔164共用阻隔壁166，縮小整體光學裝置100的體積。Referring again to FIG. 2, in a particular embodiment, optical device 100 includes a base 160. The susceptor T60 includes a first sidewall 165, a second sidewall 167, and a barrier 166. A firing cavity 162 is formed between the first sidewall 165 and the barrier wall 166, and a sensing cavity 164 is formed between the second sidewall 167 and the barrier wall 166. The firing chamber 162 shares the barrier wall 166 with the sensing chamber 164. The collimating lens 120 and the first optical lens 130 are disposed in the firing cavity 164 , and the second optical lens 140 and the sensing component 150 are disposed in the sensing cavity 164 . The barrier 166 isolates the optical components of the firing cavity 162 (eg, the collimating lens 120 and the first optical lens 130) from the optical components of the sensing cavity 164 (eg, the second optical lens 140 and the sensing component 150) to avoid Sensing element 150 is disturbed by other optical elements. Moreover, the emission cavity 162 and the sensing cavity 164 share the barrier wall 166 to reduce the volume of the integral optical device 100.
請再參照第3圖，在一特定實施例中，光學裝置100包括有濾光元件170。濾光元件170可配置於第二光學透鏡140與感測元件150之間，用以過濾進入第二光學透鏡140的環境光線。例如，環境中的可見光可能經由各種光學路徑而進入第二光學透鏡140，並投射至感測元件150。因此，設置濾光元件170可避免環境光線干擾感測元件150。在一實施例中，該濾光元件170係阻止可見光通過。在另一實施例中，濾光元件170為一紅外線帶通濾光元件。Referring again to FIG. 3, in a particular embodiment, optical device 100 includes a filter element 170. The filter element 170 can be disposed between the second optical lens 140 and the sensing element 150 for filtering ambient light entering the second optical lens 140. For example, visible light in the environment may enter the second optical lens 140 via various optical paths and be projected onto the sensing element 150. Therefore, providing the filter element 170 can prevent ambient light from interfering with the sensing element 150. In an embodiment, the filter element 170 prevents visible light from passing. In another embodiment, the filter element 170 is an infrared band pass filter element.
由上述本發明實施方式可知，將光源、感測元件及各光學鏡組整合在一模組中，使得本揭露之光學裝置可方便地應用在各種領域，例如應用於觸控面板。再者，本揭露之光學裝置具有較小的體積，很適合應用在各種可攜式的電子產品中。It can be seen from the above embodiments of the present invention that the light source, the sensing component and the optical mirrors are integrated into one module, so that the optical device of the present disclosure can be conveniently applied to various fields, for example, to a touch panel. Moreover, the optical device of the present disclosure has a small volume and is suitable for use in various portable electronic products.
雖然本發明已以實施方式揭露如上，然其並非用以限定本發明，任何熟習此技藝者，在不脫離本發明之精神和範圍內，當可作各種之更動與潤飾，因此本發明之保護範圍當視後附之申請專利範圍所界定者為準。Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and the present invention can be modified and modified without departing from the spirit and scope of the present invention. The scope is subject to the definition of the scope of the patent application attached.
100．．．光學裝置100. . . Optical device
110．．．雷射二極體110. . . Laser diode
120．．．準直鏡片120. . . Collimating lens
122．．．準直光束122. . . Collimated beam
130．．．第一光學透鏡130. . . First optical lens
132．．．第一光學透鏡之出光面132. . . Light exit surface of the first optical lens
134．．．平面光134. . . Plane light
136．．．反射平面光136. . . Reflected plane light
140．．．第二光學透鏡140. . . Second optical lens
150．．．感測元件150. . . Sensing element
152．．．感測器陣列152. . . Sensor array
154．．．電路板154. . . Circuit board
156．．．感測面156. . . Sensing surface
160．．．基座160. . . Pedestal
162．．．發射腔162. . . Launch cavity
164．．．感測腔164. . . Sensing cavity
165．．．第一側壁165. . . First side wall
166．．．阻隔壁166. . . Barrier wall
167．．．第二側壁167. . . Second side wall
170．．．濾光元件170. . . Filter element
180．．．導光元件180. . . Light guiding element
190．．．物件190. . . object
A．．．光軸A. . . Optical axis
θ．．．平面發散角θ. . . Plane divergence angle
α．．．收光角度α. . . Light angle
為讓本發明之上述和其他目的、特徵、優點與實施例能更明顯易懂，所附圖式之說明如下：The above and other objects, features, advantages and embodiments of the present invention will become more apparent and understood.
第1圖係繪示本發明一實施方式之光學裝置的分解圖。Fig. 1 is an exploded view showing an optical device according to an embodiment of the present invention.
第2圖係繪示發明一實施方式之光學裝置的立體圖。Fig. 2 is a perspective view showing an optical device according to an embodiment of the invention.
第3圖係繪示本發明一實施例之光學路徑示意圖。Figure 3 is a schematic view showing an optical path of an embodiment of the present invention.
110．．．雷射二極體110. . . Laser diode
120．．．準直鏡片120. . . Collimating lens
122．．．準直光束122. . . Collimated beam
130．．．第一光學透鏡130. . . First optical lens
132．．．第一光學透鏡之出光面132. . . Light exit surface of the first optical lens
134．．．平面光134. . . Plane light
136．．．反射平面光136. . . Reflected plane light
140．．．第二光學透鏡140. . . Second optical lens
150．．．感測元件150. . . Sensing element
156．．．感測面156. . . Sensing surface
170．．．濾光元件170. . . Filter element
180．．．導光元件180. . . Light guiding element
190．．．物件190. . . object
A．．．光軸A. . . Optical axis
θ．．．平面發散角θ. . . Plane divergence angle
α．．．收光角度α. . . Light angle
Claims (12)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW98124750A TWI394070B (en) | 2009-07-22 | 2009-07-22 | Optical device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW98124750A TWI394070B (en) | 2009-07-22 | 2009-07-22 | Optical device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| TW201104534A TW201104534A (en) | 2011-02-01 |
| TWI394070B true TWI394070B (en) | 2013-04-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW98124750A TWI394070B (en) | 2009-07-22 | 2009-07-22 | Optical device |
Country Status (1)
| Country | Link |
|---|---|
| TW (1) | TWI394070B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWM283242U (en) * | 2005-08-23 | 2005-12-11 | Elite Advanced Laser Corp | Micro-type cursor control device |
| US7133032B2 (en) * | 2003-04-24 | 2006-11-07 | Eastman Kodak Company | OLED display and touch screen |
| TW200732948A (en) * | 2006-02-17 | 2007-09-01 | Pixon Technologies Corp | Optical mouse system with illumination guide having a light spreading lens |
| TW200832200A (en) * | 2007-01-26 | 2008-08-01 | Arima Optoelectronics Corp | Optical positioning input method and device |
-
2009
- 2009-07-22 TW TW98124750A patent/TWI394070B/en not_active IP Right Cessation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7133032B2 (en) * | 2003-04-24 | 2006-11-07 | Eastman Kodak Company | OLED display and touch screen |
| TWM283242U (en) * | 2005-08-23 | 2005-12-11 | Elite Advanced Laser Corp | Micro-type cursor control device |
| TW200732948A (en) * | 2006-02-17 | 2007-09-01 | Pixon Technologies Corp | Optical mouse system with illumination guide having a light spreading lens |
| TW200832200A (en) * | 2007-01-26 | 2008-08-01 | Arima Optoelectronics Corp | Optical positioning input method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201104534A (en) | 2011-02-01 |
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