TWI724672B - Touch panel equipped with optical scanning function - Google Patents
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Abstract
Description
本發明有關於光感測器與觸控板的結合,特別是關於具有光學掃描功能的觸控板。 The present invention relates to the combination of a light sensor and a touch panel, and particularly relates to a touch panel with optical scanning function.
現有的屏下指紋識別技術,是於面板玻璃下方設置光學掃描機構,以在面板玻璃掃描指紋,進而達到識別指紋的目的。屏下指紋識別技術可用於將光學掃描機構整合於顯示面板或觸控顯示面板中,藉以簡化手持裝置的外部結構。 The existing under-screen fingerprint recognition technology is to provide an optical scanning mechanism under the panel glass to scan fingerprints on the panel glass, thereby achieving the purpose of identifying fingerprints. The under-screen fingerprint recognition technology can be used to integrate the optical scanning mechanism into the display panel or the touch display panel, thereby simplifying the external structure of the handheld device.
用於捕捉指紋的光學掃描機構,主要是利用面板玻璃光源照射指紋,進而擷取反射光加以辨識。前述的光源通常就是利用顯示面板自身的光源,特別是驅動有機發光二極體(Organic Light-Emitting Diode,OLED)陣列面板的畫素光源。前述光源需由光感測器陣列接收後,依據各光感測器接收的反射光分析指紋特徵。 The optical scanning mechanism used to capture fingerprints mainly uses the panel glass light source to illuminate the fingerprint, and then capture the reflected light for identification. The aforementioned light source usually uses the light source of the display panel itself, especially the pixel light source that drives the Organic Light-Emitting Diode (OLED) array panel. After the aforementioned light source needs to be received by the photo sensor array, the fingerprint characteristics are analyzed based on the reflected light received by each photo sensor.
為了降低反射後的週邊光干擾,光感測器與指紋面之間需要設置光準直器,以將光感測器所接收的光線限制在特定方向,才能確保光感測器接收到正確的反射光。現有的光準直器都屬於外加形式,附加於顯示面板下方,然後再將光感測器陣列設置在光準直器之下。此種附加的 設計,使得加裝光學掃描機構的顯示面板整體厚度增加,不利於手持裝置對於尺寸要求輕薄的需求。 In order to reduce the peripheral light interference after reflection, a light collimator needs to be set between the light sensor and the fingerprint surface to limit the light received by the light sensor to a specific direction, so as to ensure that the light sensor receives the correct reflected light. The existing optical collimators are all additional forms, which are attached under the display panel, and then the optical sensor array is arranged under the optical collimator. This additional The design increases the overall thickness of the display panel equipped with the optical scanning mechanism, which is not conducive to the demand for lightweight and thin handheld devices.
本發明提出一種具有光學掃描功能的觸控板,結合光學掃描功能於觸控板或觸控顯示面板中,而不會增加額外的厚度。 The present invention provides a touch panel with optical scanning function, which combines the optical scanning function in the touch panel or touch display panel without adding extra thickness.
本發明至少一實施例提出一種具有光學掃描功能的觸控板,包含有一上透明基板、一下透明基板、一第一遮光膜、一第二遮光膜、多個發光元件以及多個光感測器。 At least one embodiment of the present invention provides a touch panel with an optical scanning function, which includes an upper transparent substrate, a lower transparent substrate, a first light-shielding film, a second light-shielding film, a plurality of light-emitting elements, and a plurality of light sensors .
上透明基板設置於下透明基板之上,且上透明基板以及下透明基板之間保持一間隔;上透明基板以及下透明基板分別具有一第一線路層以及一第二線路層,第一線路層設置於上透明基板的下表面,且第二線路層設置於下透明基板的上表面;第一線路層以及第二線路層包含觸控線路,用於產生電容耦合效應,以被轉換為觸控訊號。第一遮光膜設置於上透明基板,而至少遮蔽上透明基板的局部,且第一遮光膜具有多個上準直孔。第二遮光膜設置於下透明基板,而至少遮蔽下透明基板的局部,且第二遮光膜具有多個下準直孔,分別對應於多個上準直孔。多個發光元件設置於下透明基板的上表面,且每一發光元件對應於一個上準直孔配置,以使其所發出之光線通過對應的上準直孔;第二線路層更包含多個薄膜電晶體,設置於下透明基板的上表面,以驅動發光元件。多個光感測器位於下透明基板的下方,每一光感測器對應於一個下準直孔設置,接收通過下準直孔的光線。 The upper transparent substrate is disposed on the lower transparent substrate, and an interval is maintained between the upper transparent substrate and the lower transparent substrate; the upper transparent substrate and the lower transparent substrate respectively have a first circuit layer and a second circuit layer, and the first circuit layer It is arranged on the lower surface of the upper transparent substrate, and the second circuit layer is arranged on the upper surface of the lower transparent substrate; the first circuit layer and the second circuit layer include touch circuits for generating capacitive coupling effects to be converted into touch Signal. The first light-shielding film is disposed on the upper transparent substrate to shield at least a part of the upper transparent substrate, and the first light-shielding film has a plurality of upper collimation holes. The second light-shielding film is disposed on the lower transparent substrate to shield at least a part of the lower transparent substrate, and the second light-shielding film has a plurality of lower collimating holes corresponding to the plurality of upper collimating holes, respectively. A plurality of light-emitting elements are arranged on the upper surface of the lower transparent substrate, and each light-emitting element corresponds to an upper collimating hole configuration, so that the light emitted by it passes through the corresponding upper collimating hole; the second circuit layer further includes a plurality of The thin film transistor is arranged on the upper surface of the lower transparent substrate to drive the light emitting element. A plurality of light sensors are located under the lower transparent substrate, and each light sensor is arranged corresponding to a lower collimating hole, and receives light passing through the lower collimating hole.
在本發明至少一實施例中,第一遮光膜是設置在上透明基板的下表面。 In at least one embodiment of the present invention, the first light-shielding film is disposed on the lower surface of the upper transparent substrate.
在本發明至少一實施例中,第一遮光膜為一不透光的金屬層,且延伸於第一線路層。 In at least one embodiment of the present invention, the first light-shielding film is an opaque metal layer and extends over the first circuit layer.
在本發明至少一實施例中,第一線路層包含多層結構,第一遮光膜為多層結構中的一不透光的金屬層或一黑色光阻層。 In at least one embodiment of the present invention, the first circuit layer includes a multi-layer structure, and the first light-shielding film is an opaque metal layer or a black photoresist layer in the multi-layer structure.
在本發明至少一實施例中,多層結構還包含至少一透明導電層以及至少一絕緣層。 In at least one embodiment of the present invention, the multilayer structure further includes at least one transparent conductive layer and at least one insulating layer.
在本發明至少一實施例中,光感測器設置於下透明基板的一下表面。 In at least one embodiment of the present invention, the light sensor is disposed on the lower surface of the lower transparent substrate.
在本發明至少一實施例中,具有光學掃描功能的觸控板更包含一承載基板,位於下透明基板的下方,且光感測器設置於承載基板朝向下透明基板的一面。 In at least one embodiment of the present invention, the touch panel with optical scanning function further includes a carrier substrate located below the lower transparent substrate, and the light sensor is disposed on the side of the carrier substrate facing the lower transparent substrate.
在本發明至少一實施例中,第二遮光膜是設置在下透明基板的上表面的一不透光的金屬層,且延伸於第二線路層。 In at least one embodiment of the present invention, the second light-shielding film is an opaque metal layer disposed on the upper surface of the lower transparent substrate, and extends over the second circuit layer.
在本發明至少一實施例中,第二遮光膜設置於下透明基板的下表面。 In at least one embodiment of the present invention, the second light-shielding film is disposed on the lower surface of the lower transparent substrate.
在本發明至少一實施例中,第二線路層是包含多個薄膜電晶體的一透明導電層。 In at least one embodiment of the present invention, the second circuit layer is a transparent conductive layer including a plurality of thin film transistors.
在本發明至少一實施例中,第二遮光膜是一不透光的金屬層或一黑色光阻層。 In at least one embodiment of the present invention, the second light-shielding film is an opaque metal layer or a black photoresist layer.
在本發明至少一實施例中,多個上準直孔於一水平方向上等間距排列,且多個下準直孔也是在水平方向上等間距排列。 In at least one embodiment of the present invention, a plurality of upper collimating holes are arranged at equal intervals in a horizontal direction, and a plurality of lower collimating holes are also arranged at equal intervals in a horizontal direction.
在本發明至少一實施例中,多個上準直孔以及多個下準直孔於水平方向上交錯地配置,且多個上準直孔以及多個下準直孔的投影不會全部互相重疊。 In at least one embodiment of the present invention, the plurality of upper collimating holes and the plurality of lower collimating holes are arranged staggered in the horizontal direction, and the projections of the plurality of upper collimating holes and the plurality of lower collimating holes do not all mutually overlapping.
在本發明至少一實施例中,每一上準直孔在水平方向上依序具有一第一端點以及一第二端點,對應的下準直孔在水平方向上依序具有一第三端點以及一第四端點,定義第二端點與第三端點之間的距離為Z,第一遮光膜以及第二遮光膜之間的一高度為H,則Z=z1H,且0≦z1≦50。 In at least one embodiment of the present invention, each upper collimating hole has a first end point and a second end point in the horizontal direction, and the corresponding lower collimating hole has a third end point in the horizontal direction. End point and a fourth end point, define the distance between the second end point and the third end point as Z, a height between the first light-shielding film and the second light-shielding film is H, then Z=z1H, and 0 ≦z1≦50.
在本發明至少一實施例中,每一上準直孔在水平方向上依序具有一第一端點以及一第二端點,對應的下準直孔在水平方向上依序具有一第三端點以及一第四端點,該第二端點與第三端點相切齊。 In at least one embodiment of the present invention, each upper collimating hole has a first end point and a second end point in the horizontal direction, and the corresponding lower collimating hole has a third end point in the horizontal direction. End point and a fourth end point, and the second end point is aligned with the third end point.
在本發明至少一實施例中,多個發光元件為一顯示陣列的一部分。 In at least one embodiment of the present invention, multiple light-emitting elements are part of a display array.
在本發明至少一實施例中,多個發光元件包含至少一第一發光元件、至少一第二發光元件以及至少一第三發光元件,分別發出一第一波長光、一第二波長光以及一第三波長光,而對應的多個光感測器分別為一第一光感測器、一第二光感測器以及一第三光感測器,分別用於感測第一波長光、第二波長光以及第三波長光。 In at least one embodiment of the present invention, the plurality of light-emitting elements include at least one first light-emitting element, at least one second light-emitting element, and at least one third light-emitting element, which respectively emit a first wavelength light, a second wavelength light, and a The third wavelength light, and the corresponding multiple light sensors are a first light sensor, a second light sensor, and a third light sensor, respectively, which are used to sense the first wavelength light, Second wavelength light and third wavelength light.
在本發明至少一實施例中,具有光學掃描功能的觸控板更包含一覆蓋玻璃,設置於上透明基板的上表面。 In at least one embodiment of the present invention, the touch panel with optical scanning function further includes a cover glass disposed on the upper surface of the upper transparent substrate.
在本發明至少一實施例中,定義上準直孔或下準直孔的一孔面積為L2,第一遮光膜或第二遮光膜的厚度為D,L2/D的比值較佳為0.1~50。 In at least one embodiment of the present invention, a hole area of the upper collimating hole or the lower collimating hole is defined as L 2 , the thickness of the first light-shielding film or the second light-shielding film is D, and the ratio of L 2 /D is preferably 0.1~50.
透過本發明,光準直結構可結合於具有光學掃描功能的觸控板的必要線路中,而不需透過外加結構來達到光準直的目的,因此,可以避免光準直結構增加不必要的厚度。同時,因為光準直結構結合於具有光學掃描功能的觸控板的必要線路中,可使其製作方式簡化,同時降低製作成本。 Through the present invention, the light collimating structure can be integrated into the necessary circuits of the touch panel with optical scanning function, without the need for additional structures to achieve the purpose of light collimation. Therefore, unnecessary addition of the light collimating structure can be avoided. thickness. At the same time, because the light collimating structure is integrated into the necessary circuits of the touch panel with optical scanning function, the manufacturing method can be simplified and the manufacturing cost can be reduced at the same time.
100:具有光學掃描功能的觸控板 100: Touchpad with optical scanning function
110:上透明基板 110: upper transparent substrate
110a:第一線路層 110a: the first circuit layer
112:透明導電層 112: Transparent conductive layer
114:絕緣層 114: Insulation layer
120:下透明基板 120: Lower transparent substrate
120a:第二線路層 120a: second circuit layer
120b:薄膜電晶體 120b: thin film transistor
130:第一遮光膜 130: The first shading film
132:上準直孔 132: Upper collimation hole
132a:第一端點 132a: first endpoint
132b:第二端點 132b: second endpoint
140:第二遮光膜 140: second shading film
142:下準直孔 142: Lower collimation hole
142a:第三端點 142a: third endpoint
142b:第四端點 142b: Fourth endpoint
150:發光元件 150: light-emitting element
152:第一發光元件 152: The first light-emitting element
154:第二發光元件 154: second light-emitting element
156:第三發光元件 156: third light-emitting element
160:光感測器 160: light sensor
162:第一光感測器 162: The first light sensor
164:第二光感測器 164: second light sensor
166:第三光感測器 166: Third Light Sensor
170:覆蓋玻璃 170: Cover glass
180:承載基板 180: Carrier substrate
200:物件 200: Object
D:厚度 D: thickness
X:水平方向 X: horizontal direction
H:高度 H: height
L2:孔面積 L 2 : hole area
Z:距離 Z: distance
圖1是本發明實施例中,具有光學掃描功能的觸控板的立體分解圖。 FIG. 1 is an exploded perspective view of a touch panel with optical scanning function in an embodiment of the present invention.
圖2是本發明實施例中,具有光學掃描功能的觸控板的局部剖面圖。 2 is a partial cross-sectional view of a touch panel with optical scanning function in an embodiment of the present invention.
圖3是本發明實施例中,上透明基板以及第一線路層的局部剖面圖。 3 is a partial cross-sectional view of the upper transparent substrate and the first circuit layer in the embodiment of the present invention.
圖4是本發明實施例中,下透明基板以及第二線路層的局部剖面圖。 4 is a partial cross-sectional view of the lower transparent substrate and the second circuit layer in the embodiment of the present invention.
圖5是本發明實施例中,具有光學掃描功能的觸控板的另一局部剖面圖。 FIG. 5 is another partial cross-sectional view of the touch panel with optical scanning function in the embodiment of the present invention.
圖6是本發明實施例中,具有光學掃描功能的觸控板的局部剖面圖,揭示掃描指紋的光線行進狀態。 FIG. 6 is a partial cross-sectional view of a touch panel with optical scanning function in an embodiment of the present invention, revealing the traveling state of light for scanning fingerprints.
圖7是本發明實施例中,第一遮光層或第二遮光層的上視圖。 FIG. 7 is a top view of the first light-shielding layer or the second light-shielding layer in an embodiment of the present invention.
圖8是本發明實施例中,第一遮光層以及第二遮光層的局部剖面圖。 FIG. 8 is a partial cross-sectional view of the first light-shielding layer and the second light-shielding layer in an embodiment of the present invention.
圖9是本發明實施例中,第一遮光層以及第二遮光層的局部剖面圖。 FIG. 9 is a partial cross-sectional view of the first light-shielding layer and the second light-shielding layer in an embodiment of the present invention.
在圖式中,為了清楚起見,放大了部分元件、區域等的寬度。在整份說明書中相同的元件符號表示相同的元件。應當理解,當諸如元件被稱為在另一個元件「上」或「連接到」另一個元件時,其可以直接在另一元件上或與另一元件連接,或者中間元件也可以存在。相反地,當元件被稱為「直接在另一個元件上」或「直接連接到」另一個元件時,不存在中間元件。 In the drawings, the width of some elements, regions, etc., are enlarged for clarity. The same element symbols represent the same elements throughout the specification. It should be understood that when an element is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element, or intervening elements may also be present. Conversely, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements.
應當理解,儘管術語「第一」、「第二」、「第三」等在整份說明書中可以用於敘述各種元件、部件、區域或部分。但是這些元件、部件、區域、及/或部分不應受到這些術語的限制。這些術語僅用於將一個元件、部件、區域或部分與另一個元件、部件、區域、層或部分區分開。因此,下面討論的「第一元件」、「部件」、「區域」或「部分」可以被稱為第二元件、部件、區域或部分而不脫離本文的教示。 It should be understood that although the terms "first", "second", "third", etc. can be used to describe various elements, components, regions or parts throughout the specification. However, these elements, components, regions, and/or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region or section from another element, component, region, layer or section. Therefore, the “first element,” “component,” “region,” or “portion” discussed below may be referred to as a second element, component, region, or portion without departing from the teachings herein.
此外,諸如「下」或「底」和「上」或「頂」的相對術語可以在本文用於敘述一個元件與另一個元件的關係,如圖所示。應當理解,相對術語旨在包括除了圖中所示的方位之外的裝置的不同方位。例如,如果一個圖式中的裝置翻轉,則被敘述為在其他元件的「下」側的元件將被定向在其他元件的「上」側。因此,例示性用語「下」可以包括「下」和「上」的取向,取決於圖式的特定取向。 In addition, relative terms such as "lower" or "bottom" and "upper" or "top" can be used herein to describe the relationship between one element and another element, as shown in the figure. It should be understood that relative terms are intended to include different orientations of the device in addition to the orientation shown in the figures. For example, if the device in one drawing is turned over, the elements described as being on the "lower" side of other elements will be oriented on the "upper" side of other elements. Therefore, the exemplary term "under" can include the orientations of "under" and "上", depending on the specific orientation of the schema.
請參閱圖1以及圖2所示,為本發明實施例所揭露的一種具有光學掃描功能的觸控板100,包含有一上透明基板110、一下透明基板120、一第一遮光膜130、一第二遮光膜140、多個發光元件150、以及多個光感測器160。所述光學掃描功能的一具體實施例為指紋掃描,亦即,
具有光學掃描功能的觸控板100可以是具有指紋掃描功能的觸控板,但不以此為限。
Please refer to FIG. 1 and FIG. 2, which is a
如圖2所示,上透明基板110設置於下透明基板120之上,且上透明基板110以及下透明基板120之間保持一間隔。所述間隔可為中空,由多個間隔物(圖未示)設置於上透明基板110以及下透明基板120之間,以維持間隔的大小。上透明基板110以及下透明基板120之間也可以是夾持一個透明基材薄膜(圖未示),藉以形成間隔。上透明基板110以及下透明基板120分別具有一第一線路層110a以及一第二線路層120a。其中,第一線路層110a設置於上透明基板110的下表面,且第二線路層120a設置於下透明基板120的上表面。第一線路層110a以及第二線路層120a可以包含觸控線路,用於產生電容耦合效應,以被轉換為觸控訊號。第一線路層110a以及第二線路層120a也可以是包含其他電路,例如驅動有機發光二極體(Organic Light-Emitting Diode,OLED)陣列的薄膜電晶體陣列。
As shown in FIG. 2, the upper
如圖1以及圖2所示,第一遮光膜130設置於上透明基板110,而至少遮蔽上透明基板110的局部,且第一遮光膜130具有多個上準直孔132。在第一實施例中,第一遮光膜130是設置在上透明基板110的下表面,且位置可以是接近上透明基板110邊緣。第一遮光膜130可為一不透光的金屬層,且延伸於第一線路層110a,亦即第一遮光膜130為第一線路層110a的一部分,且位置接近上透明基板110邊緣。
As shown in FIGS. 1 and 2, the first
如圖2所示,第二遮光膜140設置於下透明基板120,而至少遮蔽下透明基板120的局部,且第二遮光膜140具有多個下準直孔142。多
個下準直孔142分別對應於多個上準直孔132,其中,上準直孔132是於一水平方向X上等間距排列,下準直孔142也是在水平方向X上等間距排列,同時,上準直孔132以及下準直孔142是於水平方向X上交錯地配置,使得上準直孔132以及下準直孔142的中心軸線在水平方向X上有一定的偏移,且上準直孔132以及下準直孔142的投影不會全部互相重疊。在第一實施例中,第二遮光膜140是設置在下透明基板120的上表面,且位置可以是接近下透明基板120邊緣。第二遮光膜140可為設置在下透明基板120的上表面的一不透光的金屬層,且延伸於第二線路層120a,亦即第二遮光膜140為第二線路層120a的一部分,且位置接近上透明基板110邊緣。
As shown in FIG. 2, the second
如圖3所示,第一線路層110a可以是包含多層結構,例如第一線路層110a包含第一遮光膜130、多個透明導電層112(例如氧化銦錫層)以及多個絕緣層114(例如二氧化矽層),而第一遮光膜130為前述多層結構中的一個不透光的金屬層,或者是位於顯示面板邊緣作為黑矩陣(Black Matrix)的黑色光阻層。
As shown in FIG. 3, the
如圖4所示,第二遮光膜140不限定於設置於下透明基板120的上表面,也可以是設置於下透明基板120的下表面;而第二線路層120a則設置於上表面,與第二遮光膜140分離。第二線路層120a可以是包含多個薄膜電晶體120b的透明導電層,設置於下透明基板120的上表面,以驅動發光元件150。第二遮光膜140可以是一個不透光的金屬層,或者是位於顯示面板邊緣作為黑矩陣(Black Matrix)的黑色光阻層。
As shown in FIG. 4, the second light-shielding
如圖1以及圖2所示,多個發光元件150設置於下透明基板120的上表面,且每一發光元件150對應於一個上準直孔132配置,以使其所發出之光線可以通過對應的上準直孔132,而被待掃描的物件200反射。
As shown in FIGS. 1 and 2, a plurality of light-emitting
如圖1、圖2以及圖3所示,在第一實施例中,具有光學掃描功能的觸控板100更包含一覆蓋玻璃170,設置於上透明基板110的上表面用以防護衝擊以及磨損。待掃描的物件200係放置於覆蓋玻璃170上,因此發光元件150所發出之光線先通過上透明基板110以及覆蓋玻璃170之後被待掃描的物件200反射。覆蓋玻璃170也可以被省略,待掃描的物件200放置於上透明基板110的上表面,發光元件150所發出之光線到達上透明基板110的上表面,被待掃描的物件200反射。
As shown in FIGS. 1, 2 and 3, in the first embodiment, the
前述的發光元件150可為一顯示陣列的一部分,例如有機發光二極體陣列的一部分。亦即,本發明所述具有光學掃描功能的觸控板100,實際上可以是一個有機發光二極體顯示面板,整合了觸控以及光學掃描功能。
The aforementioned light-emitting
如圖1以及圖2所示,光感測器160設置於下透明基板120的下表面,每一光感測器160對應於一個下準直孔142設置,藉以接收通過下準直孔142的光線。如前所述,發光元件150可為一顯示陣列的一部分,亦即發光元件150可包含交錯配置的多個第一發光元件152、多個第二發光元件154以及多個第三發光元件156,分別發出第一波長光、第二波長光以及第三波長光,而對應的光感測器160則分別為第一光感測器162、第二光感測器164以及第三光感測器166,分別用於感測第一波長光、第二波長光以及第三波長光。例如第一發光元件152、第二發光元件154以
及第三發光元件156分別是紅光元件、綠光元件以及藍光元件。而對應的為第一光感測器162、第二光感測器164以及第三光感測器166分別為紅光感應器、綠光感應器以及藍光感應器。如此一來,就可以避免第一光感測器162、第二光感測器164以及第三光感測器166被相鄰的其他發光元件150干擾,提高光學掃描的精確度。
As shown in FIGS. 1 and 2, the
參閱圖5所示,為第一光感測器162、第二光感測器164以及第三光感測器166的另一種配置方式。觸控板100可更包含一承載基板180,位於下透明基板120的下方,且第一光感測器162、第二光感測器164以及第三光感測器166設置於承載基板180朝向下透明基板120的一面。承載基板180可用於直接貼附於後續的組裝結構中,例如貼附於電子裝置的底殼或主機板上。也就是說,第一光感測器162、第二光感測器164以及第三光感測器166的設置,只要相對位置位於下透明基板120的下方,且每一第一光感測器162、第二光感測器164以及第三光感測器166分別光感測器162、164、166對應於一個下準直孔142設置即可,並不限定於直接設置於下透明基板120的下表面。
Referring to FIG. 5, it is another configuration of the
如圖6所示,當一個待光學掃描的物件200,例如手指的指紋面被放置於上透明基板110的上表面或者是覆蓋玻璃170的上表面時,在圖示中係表示物件200放置於覆蓋玻璃170,藉此,發光元件150發出之光線,可通過對應的上準直孔132,穿透覆蓋玻璃170而被物件200反射後再返回通過上準直孔132,並穿過對應的下準直孔142,到達對應的光感測器160,藉以透過反射光分析物件200表面的特性,例如指紋特徵。
As shown in FIG. 6, when an
如圖7所示,為第一遮光膜130或第二遮光膜140的上視圖,圖中呈現圖同型態的上準直孔132或下準直孔142。上準直孔132或下準直孔142可以是任意型態,例如圓形、橢圓形、矩形或型態更複雜的多邊形。再參閱表一,上準直孔132或下準直孔142的孔面積越大,則光線穿透之後的亮度衰減率越小。而上準直孔132或下準直孔142於第一遮光膜130或第二遮光膜140的厚度方向上的高度,亦即第一遮光膜130或第二遮光膜140的厚度越大,則亮度衰減率越大,但反射干擾係數越小。以厚度100埃()為例,孔面積為600μm2時有最大的亮度衰減率10%,而孔面積為1000μm2時有最小的量衰減率1%,但反射干擾係數越有提昇。若以孔面積為730μm2為例比較厚度影響,則厚度100埃()有最小的亮度衰減率以及最大的反射干擾,而厚度2000埃(Å)最大的亮度衰減率以及最小的反射干擾。然而,再厚度大的情況下(例如2000埃),孔面積增加則會提昇反射干擾。
As shown in FIG. 7, it is a top view of the first light-shielding
如圖8所示,因此,定義上準直孔132或下準直孔142的孔面積為L2,而第一遮光膜130或第二遮光膜140的厚度為D,L2/D的比值較佳為0.1~50,以在亮度衰減率以及反射干擾之間取得平衡。
As shown in FIG. 8, therefore, the hole area of the
參閱圖8以及圖9所示,上準直孔132以及下準直孔142在水平方向X中心軸線上有一定的偏移,而使得上準直孔132以及下準直孔142的投影不會全部互相重疊,以減少行進路線偏向水平的光線投射至其他的上準直孔132或下準直孔142。
Referring to Figures 8 and 9, the
如圖8所示,定義每一上準直孔132在水平方向X上依序具有一第一端點132a以及一第二端點132b,對應的下準直孔142在水平方向X上依序具有一第三端點142a以及一第四端點142b。上準直孔132與對應的下準直孔142在水平方向X上的投影可以是完全不重疊,且第二端點132b與第三端點142a相切齊。
As shown in FIG. 8, it is defined that each
或,如圖2、圖5、圖6以及圖9所示,上準直孔132與對應的下準直孔142在水平方向X上的投影只有局部重疊。如圖9所示,定義第二端點132b與第三端點142a之間的距離為Z,且第一遮光膜130以及第二遮光膜140之間具有一高度H,此時Z滿足Z=z1H的關係,且z1不大於50,亦即0<z1≦50。
Or, as shown in FIGS. 2, 5, 6 and 9, the projections of the
透過本發明,光準直結構可結合於具有光學掃描功能的觸控板100的必要線路中,而不需透過外加結構來達到光準直的目的。因此,可以避免光準直結構增加不必要的厚度。同時,因為光準直結構結合於具有光學掃描功能的觸控板100的必要線路中,可使其製作方式簡化,同時降低製作成本。
Through the present invention, the light collimating structure can be integrated into the necessary circuits of the
100:具有光學掃描功能的觸控板 100: Touchpad with optical scanning function
110:上透明基板 110: upper transparent substrate
110a:第一線路層 110a: the first circuit layer
120:下透明基板 120: Lower transparent substrate
120a:第二線路層 120a: second circuit layer
130:第一遮光膜 130: The first shading film
132:上準直孔 132: Upper collimation hole
140:第二遮光膜 140: second shading film
142:下準直孔 142: Lower collimation hole
152:第一發光元件 152: The first light-emitting element
154:第二發光元件 154: second light-emitting element
156:第三發光元件 156: third light-emitting element
162:第一光感測器 162: The first light sensor
164:第二光感測器 164: second light sensor
166:第三光感測器 166: third light sensor
170:覆蓋玻璃 170: Cover glass
X:水平方向 X: horizontal direction
200:物件 200: Object
Claims (19)
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TW201428950A (en) * | 2013-01-02 | 2014-07-16 | Apple Inc | Electronic devices with light sensors and displays |
US20190018998A1 (en) * | 2017-01-25 | 2019-01-17 | Synaptics Incorporated | Hybrid optical and capacitive sensor |
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