TW201337686A - Optical touch device - Google Patents
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Abstract
Description
本發明是有關於一種觸控裝置,特別是指一種光學式觸控裝置。The present invention relates to a touch device, and more particularly to an optical touch device.
請參閱圖1,一種現有的光學式觸控面板相關技術,如台灣公開TW 201035836號專利所揭露的光學偵測裝置,其包括掃描裝置110、偵測器120,及區別模組130。其中,掃描裝置110包括光源112、反射鏡114,及耦接於反射鏡114的旋轉致動器116;光源112用以產生掃描光線;反射鏡114配置來將掃描光線反射進偵測區140;旋轉致動器116用以旋轉反射鏡114,藉此使掃描光線的入射角隨著時間變化。偵測器120係配置來偵測反射光線,其中,反射光線係由掃描光線在偵測區140內被真實觸點T1、T2反射所產生。區別模組130可根據反射光線被偵測器120偵測時所產生的時間訊號,來區分真實觸點T1、T2及虛觸點G1、G2(或稱鬼點(ghost point))。Referring to FIG. 1 , a related art optical touch panel related art, such as the optical detecting device disclosed in Japanese Patent Publication No. TW 201035836, includes a scanning device 110, a detector 120, and a difference module 130. The scanning device 110 includes a light source 112, a mirror 114, and a rotary actuator 116 coupled to the mirror 114; the light source 112 is used to generate scanning light; the mirror 114 is configured to reflect the scanning light into the detection area 140; Rotary actuator 116 is used to rotate mirror 114, thereby causing the angle of incidence of the scanning ray to change over time. The detector 120 is configured to detect reflected light, wherein the reflected light is generated by the reflected light being reflected by the real contacts T1, T2 in the detection area 140. The difference module 130 can distinguish the real contacts T1, T2 and the virtual contacts G1, G2 (or ghost points) according to the time signal generated when the reflected light is detected by the detector 120.
然,上述現有的光學偵測裝置是利用三角定位法(triangulation)來求得真實觸點T1、T2的位置,其涉及的正切(tangent)函數及餘切(cotangent)函數的計算複雜度較高。However, the above-mentioned conventional optical detecting device uses triangulation to obtain the positions of the real contacts T1 and T2, and the tangent function and the cotangent function involved are relatively high in computational complexity. .
因此,本發明之目的,即在提供一種光學式觸控裝置。Accordingly, it is an object of the present invention to provide an optical touch device.
於是,本發明光學式觸控裝置,包含一面板本體、一第一掃描光線產生模組、一第二掃描光線產生模組、一第一光感測模組、一第二光感測模組、一記憶體,及一處理單元。Therefore, the optical touch device of the present invention comprises a panel body, a first scanning light generating module, a second scanning light generating module, a first light sensing module and a second light sensing module. , a memory, and a processing unit.
該面板本體包括一表面,該表面具有一觸碰區域。該第一掃描光線產生模組用以持續地產生一第一掃描光線,該第一掃描光線與一參考線的一第一夾角隨時間而變化;該第一掃描光線產生模組還用以提供與該第一掃描光線相對應的一時間。該第二掃描光線產生模組用以持續地產生一第二掃描光線,該第二掃描光線與該參考線的一第二夾角隨時間而變化;該第二掃描光線產生模組還用以提供與該第二掃描光線相對應的一時間。該第一光感測模組用以感測光線,該第一光感測模組在感測到超過一特定強度的光線時會產生一第一感測信號。該第二光感測模組用以感測光線,該第二光感測模組在感測到超過該特定強度的光線時會產生一第二感測信號。該記憶體用於儲存預先建立的一查找表,該查找表包括多個時間,及分別對應於所述時間的多個角度資訊。該處理單元電連接於該第一掃描光線產生模組、該第二掃描光線產生模組、該第一光感測模組、該第二光感測模組,及該記憶體。The panel body includes a surface having a touch area. The first scanning light generating module is configured to continuously generate a first scanning light, and a first angle of the first scanning light and a reference line changes with time; the first scanning light generating module is further configured to provide A time corresponding to the first scanning ray. The second scanning light generating module is configured to continuously generate a second scanning light, wherein a second angle of the second scanning light and the reference line changes with time; the second scanning light generating module is further configured to provide A time corresponding to the second scanning ray. The first light sensing module is configured to sense light, and the first light sensing module generates a first sensing signal when sensing light exceeding a certain intensity. The second light sensing module is configured to sense light, and the second light sensing module generates a second sensing signal when sensing light exceeding the specific intensity. The memory is configured to store a pre-established lookup table, the lookup table including a plurality of times, and a plurality of angle information respectively corresponding to the time. The processing unit is electrically connected to the first scanning light generating module, the second scanning light generating module, the first light sensing module, the second light sensing module, and the memory.
當有至少一物件觸碰到該觸碰區域時,該至少一物件會反射該第一掃描光線產生模組於至少一第一時間序列所產生的第一掃描光線,並由該第一光感測模組感測而對應產生至少一連串第一感測信號;該至少一物件還會反射該第二掃描光線產生模組於至少一第二時間序列所產生的第二掃描光線,並由該第二光感測模組感測而對應產生至少一連串第二感測信號;其中,該至少一第一時間序列的一數量以表示,該至少一第二時間序列的一數量以表示。When at least one object touches the touch area, the at least one object reflects the first scanning light generated by the first scanning light generating module in at least one first time series, and the first light sensation is The sensing module is configured to generate at least one series of first sensing signals; the at least one object further reflects the second scanning light generated by the second scanning light generating module in at least one second time series, and the first scanning light is generated by the second scanning light generating module The two light sensing modules sense and correspondingly generate at least one series of second sensing signals; wherein, the quantity of the at least one first time series is Representing that the quantity of the at least one second time series is Said.
該處理單元在接收該個第一時間序列及該個第二時間序列之後,根據該個第一時間序列得到第一查找索引並根據該個第二時間序列得到個第二查找索引,再根據該個第一查找索引及該個第二查找索引,配合該查找表以得到至少一角度資訊組,然後根據每一角度資訊組求得一觸碰點位置。The processing unit is receiving the First time series and the After the second time series, according to the First time series get First lookup index and according to the Second time series get Second lookup index, then according to the First lookup index and the The second search index cooperates with the lookup table to obtain at least one angle information group, and then obtains a touch point position according to each angle information group.
本發明之功效在於:藉由預先建立並儲存於該記憶體的該查找表,該處理單元完全不需要進行任何的三角函數運算,即可根據由該查找表得到的該至少一角度資訊組,求得該至少一觸碰點座標,大幅降低定位所需的計算複雜度。The effect of the present invention is that, by the lookup table pre-established and stored in the memory, the processing unit does not need to perform any trigonometric function calculation at all, according to the at least one angle information group obtained by the lookup table. The at least one touch point coordinate is obtained, which greatly reduces the computational complexity required for positioning.
有關本發明之前述及其他技術內容、特點與功效,在以下配合參考圖式之一個較佳實施例的詳細說明中,將可清楚的呈現。The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments.
請參閱圖2與圖3,本發明光學式觸控裝置2之較佳實施例包含一面板本體21、一第一掃描光線產生模組22、一第二掃描光線產生模組23、一第一光感測模組24、一第二光感測模組25、一吸光元件26、一記憶體27,及一處理單元28。Referring to FIG. 2 and FIG. 3, a preferred embodiment of the optical touch device 2 of the present invention comprises a panel body 21, a first scanning light generating module 22, a second scanning light generating module 23, and a first The light sensing module 24, a second light sensing module 25, a light absorbing element 26, a memory 27, and a processing unit 28.
如圖2所示,在本較佳實施例中,該面板本體21包括一表面211,該表面211具有一矩形的觸碰區域212,及圍繞於該觸碰區域212的一周邊區域213。該第一掃描光線產生模組22及該第二掃描光線產生模組23是相對於一垂直中線L1對稱地設置於該周邊區域213的其中一邊,更進一步來說,該第一掃描光線產生模組22設置於該周邊區域213的右上角,該第二掃描光線產生模組23設置於該周邊區域213的左上角;該第一掃描光線產生模組22及該第二掃描光線產生模組23分別用以持續地產生一第一掃描光線31及一第二掃描光線32,該第一掃描光線31與一參考線L2的一第一夾角(以θ R _ i 表示)隨時間(以t i 表示)而變化,類似地,該第二掃描光線32與該參考線L2的一第二夾角(以θ L _ i 表示)也隨時間(t i )而變化。該第一光感測模組24及該第二光感測模組25是相對於該垂直中線L1對稱地設置於該周邊區域213的該其中一邊,更進一步來說,該第一光感測模組24設置於該周邊區域213的右上角,該第二光感測模組25設置於該周邊區域213的左上角;該第一光感測模組24及該第二光感測模組25分別用以感測光線,該第一光感測模組24在感測到超過一特定強度的光線時,會產生一第一感測信號,類似地,該第二光感測模組25在感測到超過該特定強度的光線時,會產生一第二感測信號。該吸光元件26是設置於該周邊區域213的另外三邊,該吸光元件26的一內側261是以吸光且不反射光的材料來塗佈,其可降低該第一光感測模組24及該第二光感測模組25感測到不必要的雜訊光線的機率。As shown in FIG. 2, in the preferred embodiment, the panel body 21 includes a surface 211 having a rectangular contact area 212 and a peripheral area 213 surrounding the touch area 212. The first scanning light generating module 22 and the second scanning light generating module 23 are symmetrically disposed on one side of the peripheral region 213 with respect to a vertical center line L1. Further, the first scanning light is generated. The second scanning light generating module 23 is disposed at an upper left corner of the peripheral area 213; the first scanning light generating module 22 and the second scanning light generating module are disposed in the upper right corner of the peripheral area 213. 23 for continuously generating a first scanning ray 31 and a second scanning ray 32, a first angle (indicated by θ R _ i ) of the first scanning ray 31 and a reference line L2 with time (in t i represents a change, and similarly, a second angle (indicated by θ L _ i ) of the second scanning ray 32 and the reference line L2 also changes with time ( t i ). The first light sensing module 24 and the second light sensing module 25 are symmetrically disposed on the one side of the peripheral region 213 with respect to the vertical center line L1, and further, the first light sense The second light sensing module 25 is disposed at an upper left corner of the peripheral region 213; the first light sensing module 24 and the second light sensing module are disposed at an upper right corner of the peripheral region 213. The group 25 is configured to sense light. The first light sensing module 24 generates a first sensing signal when sensing light exceeding a certain intensity. Similarly, the second light sensing module 25 When a light exceeding the specific intensity is sensed, a second sensing signal is generated. The light absorbing element 26 is disposed on the other three sides of the peripheral region 213. An inner side 261 of the light absorbing element 26 is coated with a material that absorbs light and does not reflect light, which can reduce the first light sensing module 24 and The second light sensing module 25 senses the probability of unnecessary noise light.
該第一掃描光線產生模組22及該第二掃描光線產生模組23的結構及運作方式相似,該第一掃描光線產生模組22包括一發光單元221,及一掃描鏡單元222,該掃描鏡單元222包括一掃描鏡223,及一致動器(actuator)224,該掃描鏡223具有一中心C1;該第二掃描光線產生模組23包括一發光單元231,及一掃描鏡單元232,該掃描鏡單元232包括一掃描鏡233,及一致動器234,該掃描鏡233具有一中心C2;該參考線L2通過所述中心C1、C2。The first scanning light generating module 22 and the second scanning light generating module 23 are similar in structure and operation. The first scanning light generating module 22 includes a light emitting unit 221 and a scanning mirror unit 222. The mirror unit 222 includes a scanning mirror 223, and an actuator 224 having a center C1. The second scanning light generating module 23 includes a light emitting unit 231 and a scanning mirror unit 232. The scanning mirror unit 232 includes a scanning mirror 233, and an actuator 234 having a center C2; the reference line L2 passes through the centers C1, C2.
其中,所述發光單元221、231用以發射光線;在本較佳實施例中,所述發光單元221、231可為用以發射雷射光線的雷射二極體(laser diode),然,所述發光單元221、231也可以為其他種用以發射光線的發光二極體(light-emitting diode,LED),並不限於本較佳實施例所揭露。所述掃描鏡223、233分別受到所述致動器224、234的致動,而分別以所述中心C1、C2為轉動中心進行往復擺動,更進一步來說,所述掃描鏡223、233分別以所述中心C1、C2為轉動中心,在一時間週期(以T mirror 表示)內於一擺動角度範圍(以±θ mirror 表示)內進行往復擺動;所述發光單元221、231發射的光線分別入射至所述掃描鏡223、233,並分別由所述掃描鏡223、233反射,藉此,持續地產生該第一掃描光線31及該第二掃描光線32;該掃描鏡單元222、223還可持續地提供該掃描鏡223、233的擺動角度及其對應的時間,更進一步來說,該第一掃描光線產生模組22會將與該第一掃描光線31相對應的一時間提供給該處理單元28,且該第二掃描光線產生模組23也會將與該第二掃描光線32相對應的一時間提供給該處理單元28;在本較佳實施例中,所述掃描鏡單元222、232可採用例如Lemoptix公司的微掃描鏡微機電系統(MEMS Scanning Micromirrors)。The light emitting units 221 and 231 are configured to emit light rays. In the preferred embodiment, the light emitting units 221 and 231 may be laser diodes for emitting laser light. The light-emitting units 221 and 231 may also be other kinds of light-emitting diodes (LEDs) for emitting light, and are not limited to the preferred embodiment. The scanning mirrors 223 and 233 are respectively actuated by the actuators 224 and 234, and reciprocally oscillate with the centers C1 and C2 as rotation centers respectively. Further, the scanning mirrors 223 and 233 respectively Reciprocatingly swinging within a range of swing angles (indicated by ± θ mirror ) in a period of time (indicated by T mirror ) with the centers C1 and C2 as the center of rotation; the light rays emitted by the light-emitting units 221 and 231 are respectively Incidentally incident on the scanning mirrors 223, 233, and reflected by the scanning mirrors 223, 233, respectively, thereby continuously generating the first scanning light 31 and the second scanning light 32; the scanning mirror units 222, 223 The swing angle of the scanning mirrors 223, 233 and the corresponding time are continuously provided. Further, the first scan light generating module 22 supplies a time corresponding to the first scanning light 31 to the The processing unit 28, and the second scanning light generating module 23 also supplies a time corresponding to the second scanning light 32 to the processing unit 28; in the preferred embodiment, the scanning mirror unit 222 232 can be used, for example, Lemoptix Micro-scanning micro-electromechanical systems (MEMS Scanning Micromirrors).
該記憶體27用於儲存一查找表(lookup table)271,該查找表271包括多個時間,及分別對應於所述時間的多個角度資訊。在本較佳實施例中,該查找表271分為兩個查找子表,所述查找子表分別為對應於該第一掃描光線產生模組22的一第一查找子表,及對應於該第二掃描光線產生模組23的一第二查找子表;該第一查找子表具有n個時間,及分別對應於所述n個時間的n個角度資訊;該第二查找子表具有n個時間,及分別對應於所述n個時間的n個角度資訊。值得一提的是,由於「該第一掃描光線產生模組22所產生的該第一掃描光線31,其與該參考線L2的該第一夾角(θ R _ i )隨著時間(t i )的變化關係」,以及「該第二掃描光線產生模組23所產生的該第二掃描光線32,其與該參考線L2的該第二夾角(θ L _ i )隨著時間(t i )的變化關係」,兩者皆為已知,因此該查找表271的該第一查找子表及該第二查找子表皆可預先建立。該查找表271的內容如表一所示。The memory 27 is configured to store a lookup table 271 that includes a plurality of times and a plurality of angle information respectively corresponding to the time. In the preferred embodiment, the lookup table 271 is divided into two search sub-tables, respectively, and the first search sub-table corresponding to the first scan light generation module 22, and corresponding to the a second lookup subtable of the second scan ray generating module 23; the first lookup subtable has n times, and n angle information corresponding to the n times respectively; the second lookup subtable has n Time, and n angle information corresponding to the n times respectively. It is worth mentioning that, due to the first scanning ray 31 generated by the first scanning light generating module 22, the first angle (θ R _ i ) of the first scanning ray 31 with the reference line L2 is over time ( t i And the second scanning ray 32 generated by the second scanning ray generating module 23, the second angle (θ L _ i ) of the reference line L2 with time ( t i ) The change relationship of the two is known, so the first lookup subtable and the second lookup subtable of the lookup table 271 can be pre-established. The contents of the lookup table 271 are as shown in Table 1.
在本較佳實施例中,t n =T mirror ,且t i -t i -1=Δt=,該查找表271的所述角度資訊為該第一夾角(θ R _ i ,i=1,2,...,n)及該第二夾角(θ L_ i ,i=1,2,...,n)的正切函數值。In the preferred embodiment, t n = T mirror and t i - t i -1 = Δ t = The angle information of the lookup table 271 is the first angle (θ R _ i , i =1, 2, . . . , n ) and the second angle (θ L_ i , i =1, 2,. The tangent function value of .., n ).
該處理單元28電連接於該第一掃描光線產生模組22、該第二掃描光線產生模組23、該第一光感測模組24、該第二光感測模組25,及該記憶體27。The processing unit 28 is electrically connected to the first scanning light generating module 22, the second scanning light generating module 23, the first light sensing module 24, the second light sensing module 25, and the memory. Body 27.
請參閱圖3與圖4,當有至少一物件(例如,一使用者的手指,圖未示)觸碰到該觸碰區域212時,該至少一物件會反射該第一掃描光線產生模組22於至少一第一時間序列的每一第一掃描光線31,以形成一第一反射光線41並由該第一光感測模組24感測,而該第一光感測模組24在感測到每一第一反射光線41時,會對應產生一第一感測信號並傳送給該處理單元28;更進一步來說,當有該至少一物件觸碰到該觸碰區域212時,該處理單元28會接收到該第一光感測模組24所產生的至少一連串第一感測信號,也同時接收該第一掃描光線產生模組22所提供的該至少一第一時間序列。類似地,該物件也會反射該第二掃描光線產生模組23於至少一第二時間序列的每一第二掃描光線32,以形成一第二反射光線42並由該第二光感測模組25感測,而該第二光感測模組25在感測到每一第二反射光線42時,會對應產生一第二感測信號並傳送給該處理單元28;更進一步來說,當有該至少一物件觸碰到該觸碰區域212時,該處理單元28還會接收到該第二光感測模組25所產生的至少一連串第二感測信號,也同時接收該第二掃描光線產生模組23所提供的該至少一第二時間序列,其中,該至少一第一時間序列的一數量以表示,該至少一第二時間序列的一數量以表示。接著,該處理單元28在接收該個第一時間序列及該個第二時間序列之後,根據該個第一時間序列得到個第一查找索引,並根據該個第二時間序列得到個第二查找索引;然後,該處理單元28根據該個第一查找索引及該個第二查找索引,配合該查找表271以得到至少一角度資訊組;最後,該處理單元28根據每一角度資訊組求得該物件於該觸碰區域212的一觸碰點位置。Referring to FIG. 3 and FIG. 4, when at least one object (for example, a user's finger, not shown) touches the touch area 212, the at least one object reflects the first scanning light generating module. Each of the first scanning rays 31 of the at least one first time series is formed by a first reflected light ray 41 and sensed by the first light sensing module 24, and the first light sensing module 24 is When each of the first reflected rays 41 is sensed, a first sensing signal is generated correspondingly and transmitted to the processing unit 28; and further, when the at least one object touches the touch region 212, The processing unit 28 receives the at least one series of first sensing signals generated by the first light sensing module 24 and simultaneously receives the at least one first time series provided by the first scanning light generating module 22 . Similarly, the object also reflects the second scanning light generating module 23 for each of the second scanning rays 32 of the at least one second time series to form a second reflected light 42 and is used by the second light sensing mode. The second light sensing module 25 senses each second reflected light 42 to generate a second sensing signal and transmits it to the processing unit 28; further, When the at least one object touches the touch area 212, the processing unit 28 further receives at least one series of second sensing signals generated by the second light sensing module 25, and simultaneously receives the second Scanning the at least one second time series provided by the light generating module 23, wherein the number of the at least one first time series is Representing that the quantity of the at least one second time series is Said. Then, the processing unit 28 receives the First time series and the After the second time series, according to the First time series get First lookup index, and according to the Second time series get Second lookup index; then, the processing unit 28 is based on First lookup index and the The second lookup index is matched with the lookup table 271 to obtain at least one angle information group. Finally, the processing unit 28 determines a touch point position of the object in the touch area 212 according to each angle information group.
對應上述本發明光學式觸控裝置2之較佳實施例,以下配合一用於光學式觸控裝置的觸碰點定位方法,進一步說明當有至少一物件觸碰到該觸碰區域212時,該處理單元28的運作。Corresponding to the preferred embodiment of the optical touch device 2 of the present invention, the touch point positioning method for the optical touch device is further described below, and further, when at least one object touches the touch region 212, The operation of the processing unit 28.
請參閱圖3、圖4與圖5,在步驟501中,該處理單元28接收該第一光感測模組24所產生的至少一連串第一感測信號、該第二光感測模組25所產生的至少一連串第二感測信號、該第一掃描光線產生模組22所提供的至少一第一時間序列,及該第二掃描光線產生模組23所提供的至少一第二時間序列;其中,該至少一連串第一感測信號與該至少一第一時間序列相對應,該至少一連串第二感測信號與該至少一第二時間序列相對應。Referring to FIG. 3, FIG. 4 and FIG. 5, in step 501, the processing unit 28 receives at least one series of first sensing signals generated by the first light sensing module 24, and the second light sensing module 25 At least one series of second sensing signals, at least one first time series provided by the first scanning light generating module 22, and at least one second time series provided by the second scanning light generating module 23; The at least one series of first sensing signals corresponds to the at least one first time series, and the at least one series of second sensing signals corresponds to the at least one second time series.
在步驟502中,該處理單元28根據該至少一第一時間序列的一數量(),及該至少一第二時間序列的一數量(),判斷是否為單一觸碰點(也就是說,單一物件觸碰到該觸碰區域212),若是,則繼續進行步驟503的處理,否則,繼續進行步驟507的處理。其中,若該至少一第一時間序列的該數量,及該至少一第二時間序列的該數量兩者皆等於1時,也就是說,=1,則判斷為單一觸碰點。In step 502, the processing unit 28 is based on a quantity of the at least one first time series ( And a quantity of the at least one second time series ( It is judged whether it is a single touch point (that is, a single object touches the touch area 212), and if so, the processing of step 503 is continued, otherwise, the processing of step 507 is continued. Wherein, if the quantity of the at least one first time series and the quantity of the at least one second time series are both equal to 1, that is, =1, it is judged as a single touch point.
以下步驟503~506是關於單一觸碰點的處理。The following steps 503-506 are related to the processing of a single touch point.
在步驟503中,該處理單元28根據該第一時間序列得到一第一查找索引,並根據該第二時間序列得到一第二查找索引。In step 503, the processing unit 28 obtains a first lookup index according to the first time series, and obtains a second lookup index according to the second time series.
假設該第一時間序列為(t R ,t R +1,...,t R +p),該第二時間序列為(t L ,t L +1,...,t L +k),該第一查找索引及該第二查找索引的計算式分別整理如式子(1)~(2),其中,該第一查找索引以Index R 表示,該第二查找索引以Index L 表示。Assuming that the first time series is ( t R , t R +1,..., t R + p ), the second time series is ( t L , t L +1,..., t L + k ) The calculation formulas of the first lookup index and the second lookup index are respectively organized as equations (1) to (2), wherein the first lookup index is represented by Index R , and the second lookup index is represented by Index L.
在步驟504中,該處理單元28根據該第一查找索引及該第二查找索引,配合預先建立的該查找表271得到一角度資訊組;該處理單元28根據該第一查找索引,自該查找表271的該第一查找子表,查找出相關於該第一查找索引的一第一角度資訊,並根據該第二查找索引,自該查找表271的該第二查找子表,查找出相關於該第二查找索引的一第二角度資訊;該角度資訊組包括該第一角度資訊及該第二角度資訊。In step 504, the processing unit 28 obtains an angle information group according to the first lookup index and the second search index, and the processing unit 28 obtains an angle information group according to the first search index. The first lookup sub-table of the table 271 finds a first angle information related to the first lookup index, and searches for the correlation from the second lookup sub-table of the lookup table 271 according to the second lookup index. a second angle information of the second search index; the angle information group includes the first angle information and the second angle information.
更進一步來說,該處理單元28根據Index R 自該查找表271的該第一查找子表,查找出相關於Index R 的一第一正切函數值(即,該第一角度資訊);根據Index L 自該查找表271的該第二查找子表,查找出相關於Index L 的一第二正切函數值(即,該第二角度資訊);該角度資訊組包括該第一正切函數值及該第二正切函數值。Still further, the processing unit 28 from the R & lt Index lookup table 271 of the first sub-table lookup, to find a correlation function value in a first tangent R & lt Index (i.e., the first angle information); The Index L from the second lookup sub-table of the lookup table 271, find a second tangent function value (ie, the second angle information) related to Index L ; the angle information group includes the first tangent function value and the The second tangent function value.
在步驟505中,該處理單元28根據該角度資訊組求得對應該單一觸碰點的一觸碰點位置。In step 505, the processing unit 28 determines a touch point position corresponding to the single touch point based on the angle information group.
如圖4所示,為了便於理解,先進行以下定義:以該觸碰區域212的一左上角為一參考原點O(其二維座標為(0,0)),該觸碰點位置以相對於該參考原點O的一觸碰點二維座標(X touch ,Y touch )來表示。該掃描鏡223的該中心C1與該掃描鏡233的該中心C2的一中心距離以D表示。該參考原點O與該掃描鏡233的該中心C2的一水平距離及一垂直距離分別以X'及Y'表示。該觸碰點位置與該中心C1的一連線,與該參考線L2的該第一夾角以θ R 表示,該觸碰點位置與該中心C2的一連線,與該參考線L2的該第二夾角以θ L 表示。該觸碰點位置與該中心C1的一水平距離以X R 表示,該觸碰點位置與該中心C2的一水平距離以X L 表示,該觸碰點位置與該參考線L2的一垂直距離以Y表示。As shown in FIG. 4, for ease of understanding, the following definition is first made: an upper left corner of the touch area 212 is a reference origin O (the two-dimensional coordinate is (0, 0)), and the touch point position is It is represented by a touch point two-dimensional coordinate ( X touch , Y touch ) with respect to the reference origin O. A center distance between the center C1 of the scanning mirror 223 and the center C2 of the scanning mirror 233 is represented by D. A horizontal distance and a vertical distance between the reference origin O and the center C2 of the scanning mirror 233 are represented by X' and Y' , respectively. a line connecting the touch point to the center C1, the first angle of the reference line L2 being represented by θ R , a line connecting the touch point and the center C2, and the line of the reference line L2 The second angle is represented by θ L . A horizontal distance between the touch point position and the center C1 is represented by X R , and a horizontal distance between the touch point position and the center C2 is represented by X L , and a vertical distance between the touch point position and the reference line L2 Expressed in Y.
值得一提的是,由於所述該掃描鏡223、233的設置位置皆為已知,故X'、Y'、D也是已知數值。It is worth mentioning that since the positions of the scanning mirrors 223 and 233 are all known, X' , Y' , and D are also known values.
首先,該處理單元28分別利用式子(3)~(4)來計算X R 及X L ,其中,該第一正切函數值、該第二正切函數值是由該查找表271直接查找出的已知數值;在本範例中,該第一正切函數值為tanθ R ,該第二正切函數值為tanθ L ,該角度資訊組包括tanθ R 及tanθ L 。First, the processing unit 28 calculates X R and X L by using equations (3) to (4), respectively, wherein the first tangent function value and the second tangent function value are directly found by the lookup table 271. A numerical value is known; in this example, the first tangent function value is tan θ R , and the second tangent function value is tan θ L , and the angle information group includes tan θ R and tan θ L .
X L =D-X R ………………………………………………(4) X L = D - X R ................................................(4)
然後,該處理單元28根據X R 及X L ,配合該第一正切函數值(tanθ R )、該第二正切函數值(tanθ L ),利用以下式子(5)~(7)來計算Y。Then, the processing unit 28 calculates Y according to X R and X L in accordance with the first tangent function value (tan θ R ) and the second tangent function value (tan θ L ) by the following equations (5) to (7). .
Y R =tanθ R ×X R ……………………………………………(5) Y R =tanθ R × X R .............................................(5)
Y L =tanθ L ×X L ……………………………………………(6) Y L =tanθ L × X L .............................................(6)
最後,該處理單元28根據X L 及Y,配合X'及Y',利用以下式子(8)~(9),即可求得該觸碰點位置(以該觸碰點二維座標(X touch ,Y touch )表示)。Finally, the processing unit 28 can determine the position of the touch point by using the following equations (8) to (9) according to X L and Y , and using X' and Y' (the two-dimensional coordinates of the touch point ( X touch , Y touch ))).
X touch =X L -X'…………………………………………‥(8) X touch = X L - X' .................................................(8)
Y touch =Y-Y'……………………………………………‥(9) Y touch = Y - Y' ....................................................(9)
在步驟506中,該處理單元28執行與該觸碰點位置相關的操作(operation),例如,電腦指令操作。In step 506, the processing unit 28 performs an operation associated with the location of the touch point, such as a computer instruction operation.
請參閱圖3,與圖5~8,以下步驟507~511是關於多個觸碰點(也就是說,多個物件觸碰到該觸碰區域212)的處理,其中,該至少一第一時間序列的該數量(),及該至少一第二時間序列的該數量()兩者其中至少一者大於1;為了便於理解,在以下的敘述中是以兩個觸碰點T1、T2為範例進行說明。Referring to FIG. 3 and FIG. 5-8, the following steps 507-511 are related to a plurality of touch points (that is, a plurality of objects touch the touch area 212), wherein the at least one first The number of time series ( And the number of the at least one second time series ( At least one of the two is greater than one; for ease of understanding, the following description will be made by taking two touch points T1 and T2 as an example.
在步驟507中,該處理單元28根據每一第一時間序列得到一第一查找索引,並根據每一第二時間序列得到一第二查找索引;其中,每一第一查找索引及每一第二查找索引的計算方式如同步驟503所述。換句話說,該處理單元28根據該個第一時間序列得到該個第一查找索引,並根據該個第二時間序列得到該個第二查找索引。In step 507, the processing unit 28 obtains a first lookup index according to each first time sequence, and obtains a second search index according to each second time sequence; wherein each first search index and each first The second lookup index is calculated as described in step 503. In other words, the processing unit 28 is based on the First time series get this First lookup index, and according to the Second time series get this Second lookup index.
在步驟508中,該處理單元28根據每一第一查找索引配合預先建立的該查找表271得到相關於該第一查找索引的一第一候選角度資訊,並根據每一第二查找索引配合預先建立的該查找表271,得到相關於該第二查找索引的一第二候選角度資訊。換句話說,該處理單元28根據該個第一查找索引配合預先建立的該查找表271,得到該個第一候選角度資訊,並根據該個第二查找索引配合預先建立的該查找表271,得到該個第二候選角度資訊。In step 508, the processing unit 28 obtains a first candidate angle information related to the first lookup index according to the first lookup index and the pre-established lookup table 271, and cooperates with each second search index according to each The lookup table 271 is created to obtain a second candidate angle information related to the second lookup index. In other words, the processing unit 28 is based on the The first lookup index cooperates with the pre-established lookup table 271 to obtain the First candidate angle information, and according to The second lookup index cooperates with the pre-established lookup table 271 to obtain the Second candidate angle information.
當所述觸碰點T1、T2,與該掃描鏡223的該中心C1及該掃描鏡233的該中心C2兩者其中一者共一直線時,及兩者其中一者為1。更進一步來說,若=1且>1,則表示所述兩個觸碰點T1、T2與該掃描鏡223的該中心C1共一直線,該處理單元28根據該第一查找索引自該查找表中查找出一第一候選角度資訊,並根據該個第二查找索引自該查找表中查找出個第二候選角度資訊;若>1且=1,則表示所述兩個觸碰點T1、T2與該掃描鏡233的該中心C2共一直線,該處理單元28據該個第一查找索引自該查找表中查找出個第一候選角度資訊,並根據該第二查找索引自該查找表中查找出一第二候選角度資訊。舉例來說,如圖6所示,該兩個觸碰點T1、T2與該掃描鏡223的該中心C1共一直線,=1且=2,該處理單元28根據該第一查找索引自該查找表中查找出一第一候選角度資訊,並根據該兩個第二查找索引自該查找表中查找出兩個第二候選角度資訊。When the touch points T1, T2 are in line with one of the center C1 of the scanning mirror 223 and the center C2 of the scanning mirror 233, and One of the two is 1. Further, if =1 and >1, indicating that the two touch points T1, T2 are in line with the center C1 of the scanning mirror 223, and the processing unit 28 searches for a first candidate angle information from the lookup table according to the first lookup index. And according to Second lookup index is found from the lookup table Second candidate angle information; >1 and =1, it means that the two touch points T1 and T2 are in line with the center C2 of the scanning mirror 233, and the processing unit 28 First lookup index is found from the lookup table The first candidate angle information is used to find a second candidate angle information from the lookup table according to the second lookup index. For example, as shown in FIG. 6, the two touch points T1 and T2 are in line with the center C1 of the scanning mirror 223. =1 and =2, the processing unit 28 searches for a first candidate angle information from the lookup table according to the first lookup index, and searches for two second candidate angle information from the lookup table according to the two second lookup indexes. .
當所述觸碰點T1、T2不與該掃描鏡223的該中心C1共一直線,且所述觸碰點T1、T2也不與該掃描鏡233的該中心C2共一直線時,及兩者皆大於1;更進一步來說,若=N touch 且N touch >1,則表示所述觸碰點T1、T2既不與該中心C1共一直線,也不與該中心C2共一直線。舉例來說,如圖7~8所示,=N touch =2,該處理單元28根據該兩個第一查找索引自該查找表中查找出兩個第一候選角度資訊,並根據該兩個第二查找索引自該查找表中查找出兩個第二候選角度資訊。When the touch points T1 and T2 are not in line with the center C1 of the scanning mirror 223, and the touch points T1 and T2 are not in line with the center C2 of the scanning mirror 233, and Both are greater than 1; further, if If N touch and N touch >1, it means that the touch points T1 and T2 are not in line with the center C1 and are not in line with the center C2. For example, as shown in Figures 7-8, = N touch = 2, the processing unit 28 searches for two first candidate angle information from the lookup table according to the two first lookup indexes, and searches for two from the lookup table according to the two second lookup indexes. Second candidate angle information.
在步驟509中,該處理單元28根據個第一候選角度資訊及個第二候選角度資訊決定多個角度資訊組,其中,所述角度資訊組的決定方式進一步說明如下。In step 509, the processing unit 28 is based on First candidate angle information and The second candidate angle information determines a plurality of angle information groups, wherein the manner of determining the angle information group is further described as follows.
如圖6所示,當所述觸碰點T1、T2,與所述中心C1、C2兩者其中一者共一直線時,不會有虛觸點(鬼點)發生,因此該處理單元28可直接由個第一候選角度資訊及個第二候選角度資訊,組合出所述角度資訊組。As shown in FIG. 6, when the touch points T1 and T2 are in line with one of the centers C1 and C2, no virtual contact (ghost point) occurs, so the processing unit 28 can Directly by First candidate angle information and The second candidate angle information combines the angle information group.
若=1且>1,該處理單元28根據該第一候選角度資訊及該個第二候選角度資訊組合出個角度資訊組,其中,每一角度資訊組包括該第一候選角度資訊,及該個第二候選角度資訊其中一者;若>1且=1,則該處理單元28根據該個第一候選角度資訊及該第二候選角度資訊組合出個角度資訊組,其中,每一角度資訊組包括該個第一候選角度資訊其中一者,及該第二候選角度資訊。舉例來說,如圖6所示,該第一候選角度資訊為tan,所述第二候選角度資訊為tan及tanθ L 2,其中一角度資訊組包括tan及tan,另一角度資訊組包括tan及tanθ L 2。If =1 and >1, the processing unit 28 according to the first candidate angle information and the Second candidate angle information combined An angle information group, wherein each angle information group includes the first candidate angle information, and the One of the second candidate angle information; >1 and =1, the processing unit 28 is based on the The first candidate angle information and the second candidate angle information are combined Angle information group, wherein each angle information group includes the One of the first candidate angle information, and the second candidate angle information. For example, as shown in FIG. 6, the first candidate angle information is tan. The second candidate angle information is tan And tan θ L 2 , wherein an angle information group includes tan And tan Another angle information group includes tan And tan θ L 2 .
如圖7~8所示,當所述觸碰點T1、T2不與該掃描鏡223的該中心C1共一直線,且所述觸碰點T1、T2也不與該掃描鏡233的該中心C2共一直線時,會有虛觸點G1、G2發生;在此情況下,=N touch 且N touch >1,該處理單元28根據所述第一查找索引自該查找表中查找出N touch 個第一候選角度資訊,並根據所述第二查找索引自該查找表中查找出N touch 個第二候選角度資訊,再根據所述第一候選角度資訊及所述第二候選角度資訊組合出N touch 個角度資訊組。As shown in FIGS. 7-8, when the touch points T1 and T2 are not in line with the center C1 of the scanning mirror 223, and the touch points T1 and T2 are not coincident with the center C2 of the scanning mirror 233, When there are a total line, there will be virtual contacts G1 and G2; in this case, = N touch and N touch >1, the processing unit 28 searches for N touch first candidate angle information from the lookup table according to the first lookup index, and searches from the lookup table according to the second lookup index. N touches a second candidate angle information, and then combines the N touch angle information groups according to the first candidate angle information and the second candidate angle information.
值得一提的是,由於觸碰該觸碰區域212的所述物件與所述掃描鏡223、233的距離不同,會造成所述第一時間序列及所述第二時間序列的長度有所差異,以下便是基於此原理進一步歸納出一第一處理方式及一第二處理方式,以決定所述角度資訊組。在以下說明中,N touch =2,假設所述第一時間序列依序分別表示為及,其中,=(+1,...,+l),=(+1,...,+m),且+l<;所述第二時間序列依序分別表示為及,其中,=(+1,...,+n),=(+1,...,+o),且+n<;所述第一時間序列的長度依序分別表示為||及||,其中,||=l,||=m;所述第二時間序列的長度依序分別表示為||及||,其中,||=n,||=o;所述第一候選角度資訊為tanθ R 1及tan,所述第二候選角度資訊為tanθ L 1及tan,其中,θ R 1<θ R 2,θ L 1<θ L 2,更進一步來說,tan<tan,tan<tan。It is worth mentioning that, because the distance between the object touching the touch area 212 and the scanning mirrors 223 and 233 is different, the lengths of the first time series and the second time series may be different. The following is based on this principle to further generalize a first processing mode and a second processing mode to determine the angle information group. In the following description, N touch = 2, assuming that the first time series are sequentially expressed as and ,among them, =( +1,..., + l ), =( +1,..., + m ), and + l < The second time series are sequentially expressed as and ,among them, =( +1,..., + n ), =( +1,..., + o ), and + n < The length of the first time series is expressed as | |and| |, where,| |= l ,| |= m ; the length of the second time series is expressed as | |and| |, where,| |= n ,| |= o ; the first candidate angle information is tan θ R 1 and tan The second candidate angle information is tan θ L 1 and tan Where θ R 1 <θ R 2 , θ L 1 <θ L 2 , and further, tan <tan Tan <tan .
如圖7所示,當||<||,且||<||時,則其中一角度資訊組(對應該觸碰點T1)包括tanθ R 2及tan,另一角度資訊組(對應該觸碰點T2)包括tan及tanθ L 2。As shown in Figure 7, when | |<| |, and | |<| When it is, one of the angle information groups (corresponding to the touch point T1) includes tan θ R 2 and tan , another angle information group (corresponding to touch point T2) including tan And tan θ L 2 .
如圖8所示,當||>||,且||>||時,則其中一角度資訊組(對應該觸碰點T1)包括tanθ R 1及tan,另一角度資訊組(對應該觸碰點T2)包括tanθ R 2及tanθ L 2。As shown in Figure 8, when | |>| |, and | |>| When it is, one of the angle information groups (corresponding to the touch point T1) includes tan θ R 1 and tan The other angle information group (corresponding to the touch point T2) includes tan θ R 2 and tan θ L 2 .
在步驟510中,該處理單元28根據所述角度資訊組分別求得對應所述觸碰點T1、T2的多個觸碰點位置;其中,每一觸碰點位置的計算方式如同步驟505所述。In step 510, the processing unit 28 respectively determines a plurality of touch point positions corresponding to the touch points T1 and T2 according to the angle information group; wherein each touch point position is calculated in the same manner as step 505. Said.
在步驟511中,該處理單元28執行與所述觸碰點位置相關的操作。In step 511, the processing unit 28 performs an operation associated with the touch point location.
綜上所述,藉由預先建立並儲存於該記憶體27的該查找表271,該處理單元28完全不需要進行任何的三角函數運算,即可根據由該查找表271得到的該至少一角度資訊組,求得該至少一觸碰點座標,大幅降低定位所需的計算複雜度;再者,藉由分析該至少一第一時間序列及該至少一第二時間序列,可進一步處理多個觸碰點之定位;故確實能達成本發明之目的。In summary, by the lookup table 271 pre-established and stored in the memory 27, the processing unit 28 does not need to perform any trigonometric operation at all, and can be based on the at least one angle obtained by the lookup table 271. The information group obtains the at least one touch point coordinate to greatly reduce the computational complexity required for the positioning; further, by analyzing the at least one first time series and the at least one second time series, the plurality of The positioning of the touch point; indeed, the object of the present invention can be achieved.
惟以上所述者,僅為本發明之較佳實施例而已,當不能以此限定本發明實施之範圍,即大凡依本發明申請專利範圍及發明說明內容所作之簡單的等效變化與修飾,皆仍屬本發明專利涵蓋之範圍內。The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent.
2...光學式觸控裝置2. . . Optical touch device
21...面板本體twenty one. . . Panel body
211...表面211. . . surface
212...觸碰區域212. . . Touch area
213...周邊區域213. . . Surrounding area
22...第一掃描光線產生模組twenty two. . . First scanning light generation module
221...發光單元221. . . Light unit
222...掃描鏡單元222. . . Scanning mirror unit
223...掃描鏡223. . . Scanning mirror
224...致動器224. . . Actuator
23...第二掃描光線產生模組twenty three. . . Second scanning light generation module
231...發光單元231. . . Light unit
232...掃描鏡單元232. . . Scanning mirror unit
233...掃描鏡233. . . Scanning mirror
234...致動器234. . . Actuator
24...第一光感測模組twenty four. . . First light sensing module
25...第二光感測模組25. . . Second light sensing module
26...吸光元件26. . . Absorbing element
261...內側261. . . Inside
27...記憶體27. . . Memory
271...查找表271. . . Lookup table
28...處理單元28. . . Processing unit
31...第一掃描光線31. . . First scanning light
32...第二掃描光線32. . . Second scanning light
41...第一反射光線41. . . First reflected light
42...第二反射光線42. . . Second reflected light
L1...垂直中線L1. . . Vertical centerline
L2...參考線L2. . . reference line
C1、C2...中心C1, C2. . . center
T1、T2...觸碰點T1, T2. . . Touch point
G1、G2...虛觸點G1, G2. . . Virtual contact
圖1是現有的一光學偵測裝置的一示意圖;1 is a schematic view of a conventional optical detecting device;
圖2是本發明光學式觸控裝置的一較佳實施例的一示意圖;2 is a schematic view of a preferred embodiment of the optical touch device of the present invention;
圖3是本發明光學式觸控裝置的該較佳實施例的一電路方塊圖;3 is a circuit block diagram of the preferred embodiment of the optical touch device of the present invention;
圖4是本發明光學式觸控裝置的該較佳實施例的一示意圖,說明僅有單一觸碰點的一範例;4 is a schematic view of the preferred embodiment of the optical touch device of the present invention, illustrating an example of only a single touch point;
圖5是用於本發明光學式觸控裝置的該較佳實施例的一觸碰點定位方法的一流程圖;5 is a flow chart of a touch point positioning method for the preferred embodiment of the optical touch device of the present invention;
圖6是本發明光學式觸控裝置的該較佳實施例的一示意圖,說明多個觸碰點與其中一掃描鏡的中心共一直線的一範例;6 is a schematic diagram of the preferred embodiment of the optical touch device of the present invention, illustrating an example in which a plurality of touch points are in line with the center of one of the scanning mirrors;
圖7是本發明光學式觸控裝置的該較佳實施例的一示意圖,說明所述觸碰點不與任一掃描鏡的中心共一直線的一範例;及7 is a schematic diagram of the preferred embodiment of the optical touch device of the present invention, illustrating an example in which the touch point is not in line with the center of any scanning mirror;
圖8是本發明光學式觸控裝置的該較佳實施例的一示意圖,說明所述觸碰點不與任一掃描鏡的中心共一直線的一範例。FIG. 8 is a schematic diagram of the preferred embodiment of the optical touch device of the present invention, illustrating an example in which the touch point is not in line with the center of any of the scanning mirrors.
2...光學式觸控裝置2. . . Optical touch device
22...第一掃描光線產生模組twenty two. . . First scanning light generation module
221...發光單元221. . . Light unit
222...掃描鏡單元222. . . Scanning mirror unit
223...掃描鏡223. . . Scanning mirror
224...致動器224. . . Actuator
23...第二掃描光線產生模組twenty three. . . Second scanning light generation module
231...發光單元231. . . Light unit
232...掃描鏡單元232. . . Scanning mirror unit
233...掃描鏡233. . . Scanning mirror
234...致動器234. . . Actuator
24...第一光感測模組twenty four. . . First light sensing module
25...第二光感測模組25. . . Second light sensing module
27...記憶體27. . . Memory
271...查找表271. . . Lookup table
28...處理單元28. . . Processing unit
Claims (10)
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TW101108475A TW201337686A (en) | 2012-03-13 | 2012-03-13 | Optical touch device |
US13/797,748 US8890848B2 (en) | 2011-06-02 | 2013-03-12 | Optical touch device |
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TW101108475A TW201337686A (en) | 2012-03-13 | 2012-03-13 | Optical touch device |
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CN107422924A (en) * | 2016-05-24 | 2017-12-01 | 仁宝电脑工业股份有限公司 | Computer system with sensing manipulation function |
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