TWI554924B - The light guide plate has a reflective structure of the optical touch device - Google Patents
The light guide plate has a reflective structure of the optical touch device Download PDFInfo
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Description
本發明係有關觸控裝置，尤其是有關偵測載有信號的光線在導光板內傳播時被碰觸的位置，產生相對的控制信號的觸控裝置。The present invention relates to a touch device, and more particularly to a touch device for detecting a position at which a light carrying a signal is touched while propagating in a light guide plate, and generating a relative control signal.
有許多結合導光板的觸控裝置，例如美國專利US7432893揭示一種基於受抑制內全反射(Frustrated Total Internal Reflection，FTIR)的輸入裝置，係將至少兩個在不同位置的光源發出的光線導入導光板中，並使該光線在導光板中以完全內部反射進行傳播，其中每個光源所發出的光線都均勻地分佈在整個導光板內，且在導光板的周緣設置光線感測器陣列以偵測由光源產生之光線。當一物件接觸導光板的表面時會破壞光線在導光板內傳播的全反射，使對應該接觸區域的光線衰減(Attenuated)；利用一處理器根據光線感測器陣列所偵測到在不同位置的至少兩個光源發出的光線的衰減信號，以三角測量法(Triangulation)決定該物件的位置。
申請人申請的台灣專利I460638及對應的美國公開專利US2014306933，揭示的導光板觸控裝置，包括一導光板、至少一個感光單元、一個光掃描單元、一微處理器少一反射膜及至少一回射器(Retro reflector)所組成。藉由微處理器偵測感光單元在光掃描單元的一掃描週期內感測到的多個信號，進一步比對多個信號，以確認物件碰觸導光板造成破壞全反射(FTIR)之衰減信號，進而確認感光單元感測到衰減信號在光掃描單元的一掃描週期內的至少兩個時間點，然後依據該至少兩個時間點獲得物件碰觸導光板的上端面的觸控點的位置資訊，進而輸出一對應的觸控信號。
上述台灣專利及對應的美國專利，需在導光板的側端面黏結反射膜及回射器，較費時間及人力，且若導光板較薄時將難以進一步在其側端面黏結反射膜及回射器，而無法達成觸控效果。There are a number of touch devices that incorporate a light guide plate. For example, US Pat. No. 7,432,893 discloses an input device based on Frustrated Total Internal Reflection (FTIR), which introduces light from at least two light sources at different positions into the light guide plate. And causing the light to propagate in the light guide plate with complete internal reflection, wherein the light emitted by each light source is evenly distributed throughout the light guide plate, and a light sensor array is disposed on the periphery of the light guide plate to detect Light produced by a light source. When an object contacts the surface of the light guide plate, the total reflection of the light propagating in the light guide plate is destroyed, and the light corresponding to the contact area is attenuated; and a processor is used to detect different positions according to the light sensor array. The attenuation signal of the light emitted by at least two of the light sources determines the position of the object by triangulation.
The light guide plate touch device disclosed in the applicant's Taiwan Patent No. I460638 and the corresponding US Patent Publication No. US2014306933 includes a light guide plate, at least one photosensitive unit, one light scanning unit, one microprocessor and one reflective film, and at least one back. It consists of a Retro reflector. The microprocessor detects the plurality of signals sensed by the photosensitive unit in a scanning period of the optical scanning unit, and further compares the plurality of signals to confirm that the object touches the light guide plate to cause a damped total reflection (FTIR) attenuation signal. And confirming that the photosensitive unit senses the attenuation signal at at least two time points in a scanning period of the light scanning unit, and then obtaining position information of the touch point of the object touching the upper end surface of the light guide plate according to the at least two time points. And outputting a corresponding touch signal.
The above-mentioned Taiwan patent and the corresponding US patent require a reflective film and a retroreflector to be bonded to the side end surface of the light guide plate, which is time consuming and labor-intensive, and if the light guide plate is thin, it is difficult to further bond the reflective film and the retroreflection on the side end surface thereof. And can't achieve touch effects.
為了進一步改良上述台灣專利及對應的美國專利，而提出本發明。
本發明的主要目的，在提供一種導光板具有反射構造的光學觸控裝置，係在導光板的上端面或下端面中至少一端面設有至少一條長條狀的光回射構造及至少一條長條狀的光反射構造，使光信號射出單元射出的光線，被導入導光板的內部後被回射至光信號射出單元的方向，然後被導入光信號感測器；當導光板的的操作區被碰觸時，利用光信號感測器感測到對應一碰觸點的至少兩光線，而分別輸出新增的低頻震動信號，或分別產生FTIR信號中至少一信號，而使光信號處理單元獲得至少兩個非正常信號值；再藉由微處理器在一週期內偵測該光信號處理單元依序輸出的信號值，然後依據該至少兩個非正常信號值分別在該週期內出現的時間點，獲得該碰觸點的位置資訊，進而輸出一對應的觸控信號。本發明不需在導光板的側端面黏結反射膜及回射器，能節省時間及人力，且能利用於較薄的導光板以降低觸控裝置的厚度。
本發明的導光板具有反射構造的光學觸控裝置，包括：
一個導光板，具有一上端面、一下端面及一側端面；該上端面具有一操作區；
一個微處理器；
一個光信號射出單元；
一個光信號感測器，鄰近該光信號射出單元；該光信號感測器具有至少一個感光單元；
一光信號處理單元，分別電氣連接該微處理器及該光信號感測器；該光信號處理單元偵測該光信號感測器輸出的多個信號，然後處理該等信號獲得多個信號值，然後將該等信號值傳輸至該微處理器；
其特徵在於：該導光板的上端面或下端面中至少一端面設有至少一條長條狀的光回射構造及至少一條長條狀的光反射構造，使該光信號射出單元射出的光線，被導入該導光板的內部後被回射至該光信號射出單元的方向，然後被導入該光信號感測器；
其中當該導光板的該操作區被碰觸時，利用該光信號感測器感測到對應一碰觸點的至少兩光線，而分別輸出新增的低頻震動信號，或分別產生FTIR信號中至少一信號，而使該光信號處理單元獲得至少兩個非正常信號值；再藉由該微處理器在一週期內偵測該光信號處理單元依序輸出的信號值，然後依據該至少兩個非正常信號值分別在該週期內出現的時間點，獲得該碰觸點的位置資訊，進而輸出一對應的觸控信號。
該光回射構造包括一對稱式鋸齒狀或不對稱式鋸齒狀中之一的光反射列及結合於該光反射列外側端面的第一反射層；該光反射列的鋸齒狀突出端朝向該導光板的外部。
該光反射構造包括一光反射面及一結合於該光反射面的第二反射層；該光反射面的下端向該導光板的外部傾斜。
該光信號射出單元鄰近該導光板的一角隅；該導光板具有圍成矩形的四個邊；該導光板形成兩條光回射構造及兩條光反射構造；該兩條光回射構造的一端分鄰近光信號射出單元，且該兩條光回射構造分別鄰近該四個邊中的兩個邊；該兩條光反射構造分別鄰近該四個邊中的其他二個邊；或該導光板形成一條光回射構造及三條光反射構造；該條光回射構造鄰近該四個邊中的一個邊；該三條光反射構造分別鄰近該四個邊中的其他三個邊。
進一步包括一個第一導光單元；該光信號感測器設於該導光板的一下端面的下方；該第一導光單元接觸導光板的下端面；被回射至該光信號射出單元的方向的光線，被該第一導光單元導入該光信號感測器；及一個第二導光單元；該光信號射出單元設於該導光板的該下端面的下方；該第二導光單元接觸導光板的下端面；該光信號射出單元射出的光線，被該第二導光單元導入該導光板的內部。
該光信號感測器是一影像擷取單元；該影像擷取單元包括一感光陣列及一鏡頭；該感光陣列具有多個感光單元；該感光陣列中分別感測到其他沒有對應該碰觸點的多數光線的多個感光單元，分別輸出多數正常信號，使該光信號處理單元獲得多數對應於該正常信號的正常信號值。
該光回射構造及該光反射構造分別從該導光板的上端面向下端面的方向延伸，其深度為該導光板厚度的1/10至9/10之間。
該光信號射出的光線是載有調變信號的光線；該導光板的該上端面對應該光線在該導光板內部傳播的範圍形成該操作區。
該導光板是由可導光的材料製成的可彎曲或不可彎曲板體；該光信號射出單元是雷射平面光信號射出單元或光信號掃描射出單元其中之一；該第一導光單元及該第二導光單元是截面為三角形的光學稜鏡。
本發明的其他目的、功效，請參閱圖式及實施例，詳細說明如下。The present invention has been proposed in order to further improve the above-mentioned Taiwan patent and the corresponding US patent.
The main object of the present invention is to provide an optical touch device having a reflective structure of a light guide plate, wherein at least one of the upper end surface or the lower end surface of the light guide plate is provided with at least one elongated light retroreflective structure and at least one long length. a strip-shaped light reflecting structure, wherein the light emitted from the light signal emitting unit is introduced into the light guide plate and then returned to the direction of the light signal emitting unit, and then introduced into the light signal sensor; when the operating area of the light guide plate When touched, the optical signal sensor senses at least two rays corresponding to a touch contact, and respectively outputs a new low frequency vibration signal, or respectively generates at least one of the FTIR signals, and the optical signal processing unit Obtaining at least two abnormal signal values; and detecting, by the microprocessor, the signal values sequentially output by the optical signal processing unit in a period, and then appearing in the period according to the at least two abnormal signal values respectively At the time point, the position information of the touch contact is obtained, and then a corresponding touch signal is output. The invention does not need to bond the reflective film and the retroreflector on the side end surface of the light guide plate, which can save time and manpower, and can be utilized for a thin light guide plate to reduce the thickness of the touch device.
The light guide plate of the present invention has an optical touch device of a reflective structure, and includes:
a light guide plate having an upper end surface, a lower end surface and a side end surface; the upper end surface has an operation area;
a microprocessor
An optical signal emitting unit;
An optical signal sensor adjacent to the optical signal emitting unit; the optical signal sensor having at least one photosensitive unit;
An optical signal processing unit electrically connecting the microprocessor and the optical signal sensor respectively; the optical signal processing unit detecting a plurality of signals output by the optical signal sensor, and then processing the signals to obtain a plurality of signal values And then transmitting the signal values to the microprocessor;
The at least one end surface of the upper end surface or the lower end surface of the light guide plate is provided with at least one elongated light-returning structure and at least one elongated light-reflecting structure, so that the light signal is emitted from the unit. After being introduced into the interior of the light guide plate, it is retroreflected to the direction of the light signal emitting unit, and then introduced into the light signal sensor;
When the operating area of the light guide plate is touched, the light signal sensor senses at least two light rays corresponding to one touch contact, and respectively outputs new low frequency vibration signals, or respectively generate FTIR signals. At least one signal, the optical signal processing unit obtains at least two abnormal signal values; and the microprocessor detects the signal value sequentially output by the optical signal processing unit in a period, and then according to the at least two An abnormal signal value is obtained at a time point in the cycle, and the position information of the touch contact is obtained, thereby outputting a corresponding touch signal.
The light retroreflecting structure includes a light reflecting column of one of a symmetric sawtooth shape or an asymmetrical saw tooth shape and a first reflective layer coupled to an outer end surface of the light reflecting column; the zigzag protruding end of the light reflecting column faces the The outside of the light guide.
The light reflecting structure includes a light reflecting surface and a second reflecting layer coupled to the light reflecting surface; the lower end of the light reflecting surface is inclined toward the outside of the light guiding plate.
The light signal emitting unit is adjacent to a corner of the light guide plate; the light guide plate has four sides enclosing a rectangle; the light guide plate forms two light retroreflective structures and two light reflecting structures; the two light retroreflecting structures One end is adjacent to the light signal emitting unit, and the two light retroreflecting structures are respectively adjacent to two of the four sides; the two light reflecting structures are respectively adjacent to the other two sides of the four sides; or the guiding The light plate forms a light retroreflective structure and three light reflecting structures; the light retroreflective structure is adjacent to one of the four sides; the three light reflecting structures are respectively adjacent to the other three sides of the four sides.
Further comprising a first light guiding unit; the optical signal sensor is disposed below the lower end surface of the light guide plate; the first light guiding unit contacts the lower end surface of the light guide plate; and is retroreflected to the direction of the light signal emitting unit The light is introduced into the optical signal sensor by the first light guiding unit; and a second light guiding unit; the light signal emitting unit is disposed below the lower end surface of the light guiding plate; the second light guiding unit is in contact The lower end surface of the light guide plate; the light emitted from the light signal emitting unit is guided into the light guide plate by the second light guiding unit.
The image sensor unit is an image capturing unit; the image capturing unit includes a photosensitive array and a lens; the photosensitive array has a plurality of photosensitive units; and the photosensitive array senses other unmatched contacts respectively The plurality of photosensitive cells of the plurality of rays respectively output a plurality of normal signals, so that the optical signal processing unit obtains a plurality of normal signal values corresponding to the normal signals.
The light retroreflective structure and the light reflecting structure respectively extend from the upper end surface to the lower end surface of the light guide plate, and have a depth of between 1/10 and 9/10 of the thickness of the light guide plate.
The light emitted by the light signal is light carrying a modulation signal; the upper end surface of the light guide plate forms the operation area corresponding to a range in which light propagates inside the light guide plate.
The light guide plate is a bendable or non-bendable plate made of a light-conducting material; the light signal emitting unit is one of a laser planar light signal emitting unit or an optical signal scanning and shooting unit; the first light guiding unit And the second light guiding unit is an optical cymbal having a triangular cross section.
For other purposes and functions of the present invention, please refer to the drawings and the embodiments, which are described in detail below.
1、2、3、4導光板具有反射構造的光學觸控裝置1, 2, 3, 4 light guide plate with reflective structure optical touch device
10 導光板 100 操作區 10 light guide plate 100 operating area
101、102、103、104邊101, 102, 103, 104 sides
11上端面 12下端面11 upper end face 12 lower end face
13側端面 14角隅13 side end face 14 corner 隅
20光信號感測器20 optical signal sensor
21感光陣列 211感光元件21 photosensitive array 211 photosensitive element
22鏡頭 23正常信號值22 lens 23 normal signal value
24非正常信號值 30光信號射出單元24 abnormal signal value 30 optical signal emission unit
31、32、33光線 40 微處理器31, 32, 33 light 40 microprocessor
50 光信號處理單元 60第一導光單元50 optical signal processing unit 60 first light guiding unit
70第二導光單元 81光回射構造70 second light guiding unit 81 light retroreflective structure
810、811光反射列 812第一反射層810, 811 light reflection column 812 first reflective layer
813突出端 82 光反射構造 813 overhang 82 light reflection structure
820光反射面 821第二反射層820 light reflecting surface 821 second reflecting layer
822 下端 90 物件822 lower 90 objects
P 碰觸點P touch contact
第1圖為物件接觸本發明第一實施例的導光板具有反射構造的光學觸控裝置的俯視示意圖。
第2圖為光線在本發明第一實施例的導光板具有反射構造的光學觸控裝置內傳播的示意圖。
第3圖為本發明導光板的上端面形成兩長條狀的光回射構造實施例的部分放大示意圖。
第4圖為本發明導光板的上端面形成兩長條狀的光反射構造實施例的部分放大示意圖。
第5圖為本發明信號值對應一週期的示意圖。
第6圖為本發明第二實施例的導光板具有反射構造的光學觸控裝置的示意圖。
第7圖為本發明第三實施例的導光板具有反射構造的光學觸控裝置的示意圖。
第8圖為本發明第四實施例的導光板具有反射構造的光學觸控裝置的示意圖。1 is a schematic plan view showing an optical touch device having a reflective structure in which a light guide plate according to a first embodiment of the present invention is in contact with the object.
Fig. 2 is a schematic view showing the propagation of light in an optical touch device having a reflective structure of the light guide plate according to the first embodiment of the present invention.
Fig. 3 is a partially enlarged schematic view showing an embodiment of a light-returning structure in which two upper strips are formed on the upper end surface of the light guide plate of the present invention.
Fig. 4 is a partially enlarged schematic view showing an embodiment of a light reflecting structure in which two upper strips are formed on the upper end surface of the light guiding plate of the present invention.
Figure 5 is a schematic diagram showing the signal value of the present invention corresponding to one cycle.
6 is a schematic view of an optical touch device having a reflective structure of a light guide plate according to a second embodiment of the present invention.
FIG. 7 is a schematic diagram of an optical touch device having a reflective structure of a light guide plate according to a third embodiment of the present invention.
FIG. 8 is a schematic diagram of an optical touch device having a reflective structure of a light guide plate according to a fourth embodiment of the present invention.
如第1、2圖所示，本發明第一實施例的導光板具有反射構造的光學觸控裝置1，包括一導光板10、一個光信號感測器20、一個光信號射出單元30、一個微處理器40、一個光信號處理單元50、一個第一導光單元60及一個第二導光單元70所組成。
導光板10具有一上端面11、一下端面12、一側端面13。導光板10側邊的周緣形成側端面13。導光板10的上端面11或下端面12中至少一端面形成至少一條長條狀的光回射構造81及至少一條長條狀的光反射構造82。導光板10具有圍成矩形的四個邊101、102、103、104。至少一條長條狀的光回射構造81及至少一條長條狀的光反射構造82分別鄰近四個邊101、102、103、104中至少一邊。導光板10是由可導光的材料製成的可彎曲或不可彎曲板體，例如壓克力板、樹脂板或玻璃板等。
光信號處理單元50分別電氣連接光信號感測器20及微處理器40。光信號處理單元50偵測光信號感測器20輸出的多個信號，然後處理該等信號獲得多個信號值，然後將該等信號值傳輸至微處理器40。
第一導光單元60及第二導光單元70可以是截面為三角形的光學稜鏡。
第3圖是本發明導光板10的上端面11形成兩長條狀的光回射構造81實施例的部分放大示意圖。光回射構造81從導光板10的上端面11向下端面12的方向延伸，其深度為導光板10厚度的1/10至9/10之間。光回射構造81包括一對稱式鋸齒狀的光反射列810或一不對稱式鋸齒狀的光反射列811及結合於光反射列810、811外側端面的第一反射層812。光反射列810、811的鋸齒狀突出端813朝向導光板10的外部，就像在導光板10的側端面13結合一回射器一般，使在導光板10內部傳播射向光回射構造81的光線以原光路回射。
第4圖是本發明導光板10的上端面11形成兩長條狀的光反射構造82實施例的部分放大示意圖。光反射構造82從導光板10的上端面11向下端面12的方向延伸，其深度為導光板10厚度的1/10至9/10之間。光反射構造82包括光反射面820及一結合於光反射面820的第二反射層821。光反射面820的下端822朝向導光板10的外部傾斜，就像在導光板10的側端面13結合一反光膜一般，使在導光板10內部傳播射向光反射構造82的光線反射回導光板10內部。
如第1、2圖所示，本發明第一實施例的導光板具有反射構造的光學觸控裝置1，光信號感測器20及光信號射出單元30分別設於導光板10的下端面12的下方，鄰近導光板10的一角隅14。第一導光單元60及第二導光單元70分別接觸導光板10的下端面12。光信號感測器20及光信號射出單元30分別鄰近第一導光單元60及第二導光單元70。導光板10形成兩條光回射構造81及兩條光反射構造82；兩條光回射構造81的一端鄰近光信號射出單元30，且分別鄰近兩個邊101、104。兩條光反射構造82分別鄰近兩個邊102、103，位於光信號感測器20及光信號射出單元30對方。
光信號射出單元30射出載有信號或調變信號的光線31，經由第二導光單元70被導入導光板10內部，或可進一步在導光板10內部進行內全反射傳播。光線31射出的範圍超過90角度，藉由第二導光單元70導引照射整個導光板10內部的範圍及兩條光反射構造82。導光板10的上端面11對應光線31在該導光板10內部傳播的範圍形成一操作區100。調變信號可為調變光線的頻率、振幅或相位的信號。
在本實施例中，光信號感測器20是一影像擷取單元，包括一感光陣列21及一鏡頭22；鏡頭22鄰近第一導光單元60。被兩條光反射構造82反射的光線，可被第一導光單元60導引經由鏡頭22照射感光陣列21，藉由鏡頭21使光信號感測器20可擷取導光板10內部的範圍呈一條狀的影像。
光信號處理單元50分別電氣連接光信號感測器20及微處理器40。光信號處理單元50偵測光信號感測器20輸出的多個信號，然後處理該等信號獲得對應於感光陣列21的多個信號值，然後將該等信號值傳輸至微處理器40。
光信號射出單元30射出載有信號的光線31、32、33，分別被第二導光單元70導入導光板10的內部，且照射整個操作區100及兩條光反射構造82。當光線照射鄰近兩個邊102、103的兩條光反射構造82時，將分別被兩條光反射構造82反射回導光板10內部，而分別射到兩條光回射構造81，再分別經由原來的光路回射到兩條光反射構造82再分別被兩條光反射構造82反射到光信號射出單元30。由於光線傳播時具有擴散性質，所以反射到光信號射出單元30的光線31、32、33也會射到鄰近光信號射出單元30的第一導光單元60，而被第一導光單元60導引至光信號感測器20。
若沒有物件90，例如手指碰觸導光板10的上端面11時，光信號射出單元30射出載有信號的光線31，在導光板10內傳播，經由兩條光反射構造82反射至感光陣列21時，將只載有原來的信號被傳送至光信號處理單元50，因此光信號處理單元50將獲得對應於原有信號的正常信號值23，如第5圖所示。
若有物件90在操作區100內進行觸控作業，碰觸或接觸導光板10的上端面11的一碰觸點P時，導光板10會受到振動，使對應碰觸點P的光線31、32、33，即通過碰觸點P或其正下方的光線31、32、33載有新增的低頻震動信號，或進一步產生FTIR信號；感光陣列22中分別感測到光線31、32、33的三個感光元件221，將分別輸出新增的低頻震動信號，或產生FTIR信號中至少一信號，而使光信號處理單元50獲得三個非正常信號值24；其他沒有對應P點的多數光線將只載有原來的信號被傳送至光信號處理單元50，使光信號處理單元50獲得多數對應於原有的信號的正常信號值23，如第5圖所示。
微處理器40偵測光信號處理單元50依序輸出對應於感光陣列21的每一感光元件211的信號值，依據在一週期內偵測到非正常信號值的時間點，就能獲得對應的感光元件221的位置；知道對應的感光元件211的位置就能獲得對應的光線，進而能獲得該光線與邊101之間的角度。依據至少兩條對應碰觸點P的光線與邊101之間的角度，利用已知的數學三角計算公式，例如應用美國專利US4,762,990中揭露的相關計算方法，即可獲得碰觸點P在操作區100的座標資訊。因此可使微處理器40依據相關的計算方法，獲得碰觸點P在操作區100的座標資訊，進而輸出一對應的觸控信號。
本發明也可參考申請人申請的台灣公開專利第201342161號“雷射掃描輸入裝置”中揭示的座標計算技術，藉由微處理器40在一週期內偵測光信號處理單元50依序輸出的信號值，然後依據至少兩個非正常信號值分別在該週期內出現的時間點獲該碰觸點的位置資訊，進而輸出一對應的觸控信號。
本發明也可先試驗然後記錄物件碰觸導光板的上端面的碰觸點的位置與光信號處理單元在一週期內輸出的非正常信號值的至少兩個時間點的相關資訊；然後使微處理器根據該相關資訊及依據光信號處理單元在一週期內輸出的非正常信號值的至少兩個時間點，獲得物件碰觸導光板的上端面的碰觸點的位置資訊。
本發明的導光板10也可形成一條光回射構造81及三條光反射構造82。一條光回射構造81鄰近兩個邊101、104中之一邊、或位於與影像擷取單元21相對的位置，例如鄰近邊102或邊103，並使三條光反射構造82鄰近沒有鄰近光回射構造81的其他三個邊，也就是使光信號射出單元30射出照射操作區100的光線能回射至鄰近光信號射出單元30的光信號感測器20的配置方式，都能達到相同的效果。
如第6圖所示，本發明第二實施例的導光板具有反射構造的光學觸控裝置2，除了不需第一導光單元60，光信號感測器20被置於導光板10的一角隅14的外側；光信號感測器20直接由導光板10的一角隅14的外側攝取導光板10內部的影像，其他結構大致與第一實施例的導光板具有反射構造的光學觸控裝置相同，也能達到相同的效果。本實施例是應用於導光板10較厚，光信號感測器20可直接經由導光板10的側端面13攝取導光板10內部的影像的情況。
如第7圖所示，本發明第三實施例的導光板具有反射構造的光學觸控裝置3，除了不需要第二導光單元70，光信號射出單元30被置於導光板10的一角隅14的外側，光信號射出單元30射出的光線直接由導光板10的一角隅14的外側射入導光板10的內部，其他結構大致與第一實施例的導光板具有反射構造的光學觸控裝置相同，也能達到相同的效果。本實施例是應用於導光板10較厚，光信號射出單元30射出的光線可直接經由導光板10的側端面13射入導光板10內部的情況。
如第8圖所示，本發明第四實施例的導光板具有反射構造的光學觸控裝置4，除了不需要第一導光單元60及第二導光單元70，光信號射出單元30被置於導光板10的一角隅14的外側，光信號射出單元30射出的光線直接由導光板10的一角隅14的外側射入導光板10的內部，兩個光信號感測器20分別靠近光信號射出單元30，且接觸導光板10的側端面13或下端面12中至少一者外，其他結構大致與第一實施例的導光板具有反射構造的光學觸控裝置相同，也能達到相同的效果。本實施例是應用於導光板10較厚，光信號射出單元30射出的光線可直接經由導光板10的側端面13射入導光板10內部的情況。本實施例的光信號感測器20是一個感光元件；光信號射出單元30可為光信號掃描射出單元，可發出光線掃描整個操作區。
本發明的光信號感測器20包括至少一個感光元件或為一影像擷取單元。光信號射出單元30可以包括雷射平面光信號射出單元或光信號掃描射出單元等，而光信號掃描射出單元可包括翻轉面鏡或包括微機電系統(Micro-Electro-Mechanical System，MEMS)、以及微光機電系統(Micro-Opto-Electro-Mechanical System，MEMS)等機構，使光線掃描操作區。
本發明的特徵在於使導光板的上端面或下端面中至少一端面形成至少一條長條狀的光回射構造及至少一條長條狀的光反射構造，使光信號射出單元射出的光線，被導入導光板的內部後被回射至光信號射出單元的方向，然後被導入光信號感測器。本發明不需在導光板的側端面黏結反射膜及回射器，能節省時間及人力，且能利用於較薄的導光板以降低觸控裝置的厚度。
以上所記載者，僅為利用本發明技術內容之實施例，任何熟悉本項技藝者運用本發明所為之修飾、變化，皆屬本創作所主張之專利範圍。As shown in FIGS. 1 and 2, the optical light guide plate of the first embodiment of the present invention has a reflective touch structure, including a light guide plate 10, an optical signal sensor 20, an optical signal emitting unit 30, and a light sensing device. The microprocessor 40, an optical signal processing unit 50, a first light guiding unit 60 and a second light guiding unit 70 are formed.
The light guide plate 10 has an upper end surface 11, a lower end surface 12, and a side end surface 13. The peripheral edge of the side of the light guide plate 10 forms a side end surface 13. At least one of the upper end surface 11 or the lower end surface 12 of the light guide plate 10 is formed with at least one elongated light returning structure 81 and at least one elongated light reflecting structure 82. The light guide plate 10 has four sides 101, 102, 103, 104 that are rectangular. At least one elongated light retroreflective structure 81 and at least one elongated light reflecting structure 82 are adjacent to at least one of the four sides 101, 102, 103, 104, respectively. The light guide plate 10 is a bendable or non-bendable plate made of a light-guiding material such as an acrylic plate, a resin plate or a glass plate.
The optical signal processing unit 50 electrically connects the optical signal sensor 20 and the microprocessor 40, respectively. The optical signal processing unit 50 detects a plurality of signals output by the optical signal sensor 20, then processes the signals to obtain a plurality of signal values, and then transmits the signal values to the microprocessor 40.
The first light guiding unit 60 and the second light guiding unit 70 may be optical cymbals having a triangular cross section.
Fig. 3 is a partially enlarged schematic view showing an embodiment in which the upper end surface 11 of the light guiding plate 10 of the present invention is formed into two elongated light-returning structures 81. The light retroreflective structure 81 extends from the upper end surface 11 of the light guide plate 10 in the direction of the lower end surface 12, and has a depth of between 1/10 and 9/10 of the thickness of the light guide plate 10. The light retroreflective structure 81 includes a symmetric sawtooth light reflecting column 810 or an asymmetric sawtooth light reflecting column 811 and a first reflective layer 812 coupled to the outer end faces of the light reflecting columns 810, 811. The zigzag protruding end 813 of the light reflecting columns 810, 811 faces the outside of the light guide plate 10 as if a retroreflector is coupled to the side end surface 13 of the light guiding plate 10, so that the light is reflected inside the light guiding plate 10 toward the light returning structure 81. The light is reflected back from the original light path.
Fig. 4 is a partially enlarged schematic view showing an embodiment in which the upper end surface 11 of the light guiding plate 10 of the present invention is formed into two elongated light reflecting structures 82. The light reflecting structure 82 extends from the upper end surface 11 of the light guide plate 10 in the direction of the lower end surface 12, and has a depth of between 1/10 and 9/10 of the thickness of the light guide plate 10. The light reflecting structure 82 includes a light reflecting surface 820 and a second reflecting layer 821 coupled to the light reflecting surface 820. The lower end 822 of the light reflecting surface 820 is inclined toward the outside of the light guide plate 10, just like a reflective film is joined to the side end surface 13 of the light guiding plate 10, so that the light that is transmitted inside the light guiding plate 10 and reflected toward the light reflecting structure 82 is reflected back to the light guiding plate. 10 internal.
As shown in the first and second embodiments, the light guide plate of the first embodiment of the present invention has an optical touch device 1 having a reflective structure. The optical signal sensor 20 and the optical signal emitting unit 30 are respectively disposed on the lower end surface 12 of the light guide plate 10. Below the corner, adjacent to a corner 隅 14 of the light guide plate 10. The first light guiding unit 60 and the second light guiding unit 70 respectively contact the lower end surface 12 of the light guide plate 10 . The optical signal sensor 20 and the optical signal emitting unit 30 are adjacent to the first light guiding unit 60 and the second light guiding unit 70, respectively. The light guide plate 10 forms two light retroreflective structures 81 and two light reflecting structures 82; one end of the two light retroreflective structures 81 is adjacent to the light signal emitting unit 30 and adjacent to the two sides 101, 104, respectively. The two light reflecting structures 82 are respectively adjacent to the two sides 102, 103, and are located at the opposite side of the optical signal sensor 20 and the optical signal emitting unit 30.
The light signal emitting unit 30 emits the light beam 31 carrying the signal or the modulated signal, and is introduced into the light guide plate 10 via the second light guiding unit 70, or may further perform internal total reflection propagation inside the light guiding plate 10. The range in which the light ray 31 is emitted exceeds 90 degrees, and the second light guiding unit 70 guides the range of the entire light guide plate 10 and the two light reflecting structures 82. The upper end surface 11 of the light guide plate 10 forms an operation area 100 corresponding to a range in which the light ray 31 propagates inside the light guide plate 10. The modulated signal can be a signal that modulates the frequency, amplitude, or phase of the light.
In this embodiment, the optical signal sensor 20 is an image capturing unit, including a photosensitive array 21 and a lens 22; the lens 22 is adjacent to the first light guiding unit 60. The light reflected by the two light reflecting structures 82 can be guided by the first light guiding unit 60 to illuminate the photosensitive array 21 via the lens 22, and the lens 21 can be used to capture the range of the light guiding plate 10 inside the light guiding plate 10. A strip of image.
The optical signal processing unit 50 electrically connects the optical signal sensor 20 and the microprocessor 40, respectively. The optical signal processing unit 50 detects a plurality of signals output by the optical signal sensor 20, then processes the signals to obtain a plurality of signal values corresponding to the photosensitive array 21, and then transmits the signal values to the microprocessor 40.
The light signal emitting unit 30 emits the light beams 31, 32, and 33 carrying the signals, and is guided into the inside of the light guide plate 10 by the second light guiding unit 70, and irradiates the entire operation area 100 and the two light reflecting structures 82. When the light illuminates the two light reflecting structures 82 adjacent to the two sides 102, 103, they are respectively reflected back to the inside of the light guide plate 10 by the two light reflecting structures 82, and respectively incident on the two light returning structures 81, respectively. The original optical path is retroreflected to the two light reflecting structures 82 and reflected by the two light reflecting structures 82 to the optical signal emitting unit 30, respectively. Since the light has a diffusion property, the light rays 31, 32, 33 reflected to the light signal emitting unit 30 are also incident on the first light guiding unit 60 adjacent to the light signal emitting unit 30, and are guided by the first light guiding unit 60. Lead to the optical signal sensor 20.
If there is no object 90, for example, when the finger touches the upper end surface 11 of the light guide plate 10, the light signal emitting unit 30 emits the light 31 carrying the signal, propagates in the light guide plate 10, and is reflected to the photosensitive array 21 via the two light reflecting structures 82. At this time, only the original signal is carried to the optical signal processing unit 50, so the optical signal processing unit 50 will obtain the normal signal value 23 corresponding to the original signal, as shown in FIG.
If the object 90 performs a touch operation in the operation area 100, and touches or touches a touch contact P of the upper end surface 11 of the light guide plate 10, the light guide plate 10 is vibrated, so that the light 31 corresponding to the touch contact P, 32, 33, that is, by touching the contact P or the light rays 31, 32, 33 directly under it, the new low frequency vibration signal is carried, or the FTIR signal is further generated; the light rays 31, 32, 33 are respectively sensed in the photosensitive array 22. The three photosensitive elements 221 will respectively output the newly added low frequency vibration signals or generate at least one of the FTIR signals, so that the optical signal processing unit 50 obtains three abnormal signal values 24; the other plurality of rays having no corresponding P points The original signal is transmitted to the optical signal processing unit 50, and the optical signal processing unit 50 obtains a plurality of normal signal values 23 corresponding to the original signals, as shown in FIG.
The microprocessor 40 detects the signal value of each photosensitive element 211 corresponding to the photosensitive array 21 in sequence, and obtains the corresponding time according to the time point when the abnormal signal value is detected in one cycle. The position of the photosensitive element 221; knowing the position of the corresponding photosensitive element 211, the corresponding light can be obtained, and the angle between the light and the edge 101 can be obtained. Depending on the angle between the ray of at least two corresponding touch contacts P and the edge 101, a known mathematical trigonometric formula can be used, for example, by applying the relevant calculation method disclosed in U.S. Patent No. 4,762,990, The coordinate information of the operation area 100. Therefore, the microprocessor 40 can obtain the coordinate information of the touch contact P in the operation area 100 according to the related calculation method, and then output a corresponding touch signal.
The present invention is also applicable to the coordinate calculation technique disclosed in the "Laser Scanning Input Device" of Taiwan Patent Application No. 201342161, which is applied by the microprocessor 40 to detect the sequential output of the optical signal processing unit 50 in a cycle. The signal value is then obtained according to the position information of the touch contact at the time point when the at least two abnormal signal values respectively appear in the period, thereby outputting a corresponding touch signal.
The invention may also first test and then record information about the position of the touch contact of the object touching the upper end surface of the light guide plate and at least two time points of the abnormal signal value outputted by the optical signal processing unit in one cycle; The processor obtains, according to the related information and at least two time points according to the abnormal signal value output by the optical signal processing unit in one cycle, position information of the touch contact of the object touching the upper end surface of the light guide plate.
The light guide plate 10 of the present invention may also form a light retroreflective structure 81 and three light reflecting structures 82. A light retroreflective structure 81 is adjacent one of the two sides 101, 104, or at a position opposite the image capturing unit 21, such as adjacent the side 102 or the side 103, and causes the three light reflecting structures 82 to be adjacent to no adjacent light. The other three sides of the structure 81, that is, the arrangement in which the light signal emitting unit 30 emits the light illuminating the operation area 100 can be retroreflected to the optical signal sensor 20 adjacent to the light signal emitting unit 30, can achieve the same effect. .
As shown in FIG. 6, the light guide plate of the second embodiment of the present invention has a reflective touch structure optical touch device 2, and the optical signal sensor 20 is placed at a corner of the light guide plate 10 except that the first light guide unit 60 is not required. The light signal sensor 20 directly captures the image inside the light guide plate 10 from the outside of a corner 隅 14 of the light guide plate 10. The other structure is substantially the same as the optical touch device having the reflective structure of the light guide plate of the first embodiment. , can also achieve the same effect. The present embodiment is applied to a case where the light guide plate 10 is thick, and the optical signal sensor 20 can directly capture an image of the inside of the light guide plate 10 via the side end surface 13 of the light guide plate 10.
As shown in FIG. 7, the light guide plate according to the third embodiment of the present invention has an optical touch device 3 of a reflective structure. The optical signal emitting unit 30 is placed at a corner of the light guide plate 10 except that the second light guiding unit 70 is not required. The light emitted from the light signal emitting unit 30 is directly incident on the inside of the light guide plate 10 from the outside of a corner 隅 14 of the light guide plate 10, and the optical touch device having a reflective structure substantially the same as that of the light guide plate of the first embodiment. The same, the same effect can be achieved. The present embodiment is applied to a case where the light guide plate 10 is thick, and the light emitted from the light signal emitting unit 30 can be directly incident into the inside of the light guide plate 10 via the side end surface 13 of the light guide plate 10.
As shown in FIG. 8, the light guide plate of the fourth embodiment of the present invention has an optical touch device 4 having a reflective structure. The optical signal emitting unit 30 is disposed except that the first light guiding unit 60 and the second light guiding unit 70 are not required. On the outside of a corner 隅 14 of the light guide plate 10, the light emitted from the light signal emitting unit 30 is directly incident into the inside of the light guide plate 10 from the outside of a corner 隅 14 of the light guide plate 10, and the two light signal sensors 20 are respectively close to the light signal. The injection unit 30 and the at least one of the side end surface 13 or the lower end surface 12 of the light guide plate 10 are substantially the same as the optical touch device having the reflective structure of the light guide plate of the first embodiment, and the same effect can be achieved. . The present embodiment is applied to a case where the light guide plate 10 is thick, and the light emitted from the light signal emitting unit 30 can be directly incident into the inside of the light guide plate 10 via the side end surface 13 of the light guide plate 10. The optical signal sensor 20 of the present embodiment is a photosensitive element; the optical signal emitting unit 30 can be an optical signal scanning and emitting unit that emits light to scan the entire operation area.
The optical signal sensor 20 of the present invention includes at least one photosensitive element or an image capture unit. The optical signal emitting unit 30 may include a laser plane light signal emitting unit or an optical signal scanning and emitting unit, and the optical signal scanning and emitting unit may include a flip mirror or a Micro-Electro-Mechanical System (MEMS), and A mechanism such as a Micro-Opto-Electro-Mechanical System (MEMS) allows light to scan the operating area.
The present invention is characterized in that at least one of the upper end surface or the lower end surface of the light guide plate is formed with at least one elongated light-returning structure and at least one elongated light-reflecting structure, so that the light emitted from the light signal emitting unit is After being introduced into the interior of the light guide plate, it is retroreflected to the direction of the light signal emitting unit, and then introduced into the light signal sensor. The invention does not need to bond the reflective film and the retroreflector on the side end surface of the light guide plate, which can save time and manpower, and can be utilized for a thin light guide plate to reduce the thickness of the touch device.
The above descriptions are only examples of the use of the technical content of the present invention, and any modifications and variations made by those skilled in the art using the present invention are within the scope of the patent claimed.
1導光板具有反射構造的光學觸控裝置1 light guide plate has a reflective structure optical touch device
10 導光板 100 操作區 10 light guide plate 100 operating area
101、102、103、104邊 14角隅101, 102, 103, 104 sides 14 corners
31、32、33光線 40 微處理器31, 32, 33 light 40 microprocessor
50 光信號處理單元 81光回射構造50 optical signal processing unit 81 light retroreflective structure
82 光反射構造 90 物件82 light reflection structure 90 object
P 碰觸點P touch contact
Claims (15)
一個導光板，具有一上端面、一下端面及一側端面；該上端面具有一操作區；
一個微處理器；
一個光信號射出單元；
一個光信號感測器，鄰近該光信號射出單元；該光信號感測器具有至少一個感光單元；
一光信號處理單元，分別電氣連接該微處理器及該光信號感測器；該光信號處理單元偵測該光信號感測器分別輸出的多個信號，然後處理該等信號獲得多個信號值，然後將該等信號值傳輸至該微處理器；
其特徵在於：該導光板的上端面或下端面中至少一端面設有至少一條長條狀的光回射構造及至少一條長條狀的光反射構造，使該光信號射出單元射出的光線，被導入該導光板的內部後被回射至該光信號射出單元的方向，然後被導入該光信號感測器；
其中當該導光板的該操作區被碰觸時，利用該光信號感測器感測到對應一碰觸點的至少兩光線，而分別輸出新增的低頻震動信號，或分別產生FTIR信號中至少一信號，而使該光信號處理單元獲得至少兩個非正常信號值；再藉由該微處理器在一週期內偵測該光信號處理單元依序輸出的信號值，然後依據該至少兩個非正常信號值分別在該週期內出現的時間點，獲得該碰觸點的位置資訊，進而輸出一對應的觸控信號。An optical touch device having a reflective structure of a light guide plate, comprising:
a light guide plate having an upper end surface, a lower end surface and a side end surface; the upper end surface has an operation area;
a microprocessor
An optical signal emitting unit;
An optical signal sensor adjacent to the optical signal emitting unit; the optical signal sensor having at least one photosensitive unit;
An optical signal processing unit electrically connecting the microprocessor and the optical signal sensor respectively; the optical signal processing unit detects a plurality of signals respectively output by the optical signal sensor, and then processes the signals to obtain a plurality of signals Values, and then transmitting the signal values to the microprocessor;
The at least one end surface of the upper end surface or the lower end surface of the light guide plate is provided with at least one elongated light-returning structure and at least one elongated light-reflecting structure, so that the light signal is emitted from the unit. After being introduced into the interior of the light guide plate, it is retroreflected to the direction of the light signal emitting unit, and then introduced into the light signal sensor;
When the operating area of the light guide plate is touched, the light signal sensor senses at least two light rays corresponding to one touch contact, and respectively outputs new low frequency vibration signals, or respectively generate FTIR signals. At least one signal, the optical signal processing unit obtains at least two abnormal signal values; and the microprocessor detects the signal value sequentially output by the optical signal processing unit in a period, and then according to the at least two An abnormal signal value is obtained at a time point in the cycle, and the position information of the touch contact is obtained, thereby outputting a corresponding touch signal.
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| TW104101693A TWI554924B (en) | 2015-01-19 | 2015-01-19 | The light guide plate has a reflective structure of the optical touch device |
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| TW104101693A TWI554924B (en) | 2015-01-19 | 2015-01-19 | The light guide plate has a reflective structure of the optical touch device |
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| TW201627838A TW201627838A (en) | 2016-08-01 |
| TWI554924B true TWI554924B (en) | 2016-10-21 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120262413A1 (en) * | 2011-04-13 | 2012-10-18 | Hsin-Tao Huang | Touch display |
| US20130222346A1 (en) * | 2012-02-29 | 2013-08-29 | Pixart Imaging Inc. | Optical touch device and detection method thereof |
| TW201409324A (en) * | 2012-08-21 | 2014-03-01 | Wintek Corp | Touch display panel and optical touch panel thereof |
| TW201445401A (en) * | 2013-05-23 | 2014-12-01 | Wistron Corp | Touch panel and operating method using the same |
| TW201502924A (en) * | 2013-07-01 | 2015-01-16 | Era Optoelectronics Inc | Light guide plate touch device based on total internal reflection of diffracted light |
-
2015
- 2015-01-19 TW TW104101693A patent/TWI554924B/en not_active IP Right Cessation
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120262413A1 (en) * | 2011-04-13 | 2012-10-18 | Hsin-Tao Huang | Touch display |
| US20130222346A1 (en) * | 2012-02-29 | 2013-08-29 | Pixart Imaging Inc. | Optical touch device and detection method thereof |
| TW201409324A (en) * | 2012-08-21 | 2014-03-01 | Wintek Corp | Touch display panel and optical touch panel thereof |
| TW201445401A (en) * | 2013-05-23 | 2014-12-01 | Wistron Corp | Touch panel and operating method using the same |
| TW201502924A (en) * | 2013-07-01 | 2015-01-16 | Era Optoelectronics Inc | Light guide plate touch device based on total internal reflection of diffracted light |
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| TW201627838A (en) | 2016-08-01 |
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