TWM575561U - Image capture apparatus - Google Patents
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- TWM575561U TWM575561U TW107214184U TW107214184U TWM575561U TW M575561 U TWM575561 U TW M575561U TW 107214184 U TW107214184 U TW 107214184U TW 107214184 U TW107214184 U TW 107214184U TW M575561 U TWM575561 U TW M575561U
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Abstract
Description
本創作涉及一種電子裝置，特別是涉及一種屏下取像裝置(under-display image capture apparatus)。 The present invention relates to an electronic device, and more particularly to an under-display image capture apparatus.
現有的光學式生物辨識裝置可應用於偵測以及辨識臉部、聲音、虹膜、視網膜或是指紋。以指紋辨識裝置為例，指紋辨識裝置目前已可被應用於電子產品(如：智慧型手機或者平板電腦等)中，以用來辨識使用者的身份。 Existing optical biometric devices can be used to detect and recognize faces, sounds, irises, retinas or fingerprints. Taking the fingerprint identification device as an example, the fingerprint identification device can be used in electronic products (such as smart phones or tablets) to identify the user.
在現有的電子產品中，一般是利用顯示面板所產生的光束，作為用來指紋辨識的感測光源。前述的顯示面板例如是有機發光二極體顯示面板。在現有應用於電子產品中的指紋辨識裝置中，當使用者以手指按壓位於最外側的透光板時，顯示面板所產生的光束投射到透光板之後，在透光板與環境介質的交界面(即，透光板的外表面)產生全反射之後，再被影像感測器接收。 In existing electronic products, a light beam generated by a display panel is generally used as a sensing light source for fingerprint recognition. The aforementioned display panel is, for example, an organic light emitting diode display panel. In a fingerprint identification device currently used in an electronic product, when a user presses a light-transmitting plate located at the outermost side with a finger, a light beam generated by the display panel is projected onto the light-transmitting plate, and the light-transmitting plate is intersected with the environmental medium. The interface (ie, the outer surface of the light transmissive plate) is totally reflected and then received by the image sensor.
由於手指具有多條不規則的凸紋與凹紋，當使用者將手指放置在透光件上時，凸紋會接觸透光件，但凹紋不會接觸透光件。因此，接觸透光件的凸紋會破壞光束在透光件內的全反射，而未接觸透光件的凹紋則不會影響光束的全反射，從而使影像感測器擷取到的指紋圖案具有對應凸紋的暗紋以及對應凹紋的亮紋。隨後，通過影像處理器來處理影像感測器所擷取的指紋圖案，可進一步判定使用者的身份。 Since the finger has a plurality of irregular ridges and indentations, when the user places the finger on the light-transmitting member, the ridge will contact the light-transmitting member, but the concave groove will not contact the light-transmitting member. Therefore, the ridges contacting the light transmitting member may destroy the total reflection of the light beam in the light transmitting member, and the concave lines not contacting the light transmitting member will not affect the total reflection of the light beam, thereby causing the fingerprint captured by the image sensor. The pattern has dark lines corresponding to the ridges and bright lines corresponding to the indentations. Subsequently, the fingerprint image captured by the image sensor is processed by the image processor to further determine the identity of the user.
然而，在現有的指紋辨識裝置與薄膜電晶體液晶顯示器整合時，由薄膜電晶體液晶顯示器的背光模組所產生的光束，被擴散片擴散之後才投射到透光板。如此，在擷取指紋影像時，投射到 透光板的光束會較不均勻，導致所取得的指紋影像較為模糊，影響辨識的精確性。 However, when the existing fingerprint identification device is integrated with the thin film transistor liquid crystal display, the light beam generated by the backlight module of the thin film transistor liquid crystal display is diffused by the diffusion sheet before being projected onto the light transmission plate. So, when capturing a fingerprint image, project to The beam of the light-transmitting plate will be less uniform, resulting in a blurred image of the fingerprint obtained, which affects the accuracy of the identification.
現有技術中也會另外設置一發光件，以產生用來辨識指紋的光束。發光件所產生的光束進入透光件之後，在透光件內被多次全反射。當使用者以手指按壓透光件的外表面時，影像感測器可擷取到指紋圖案。 A illuminating member is additionally provided in the prior art to generate a light beam for recognizing the fingerprint. After the light beam generated by the illuminating member enters the light transmitting member, it is totally reflected multiple times in the light transmitting member. When the user presses the outer surface of the light transmissive member with a finger, the image sensor can capture the fingerprint pattern.
然而，透光件的外表面很容易被微粒或是灰塵等污染物附著，而破壞光束在透光件內的全反射。因此，在光束被傳遞到手指所按壓的位置之前，就會損失一部分光束，進而影響影像感測器的取像品質。 However, the outer surface of the light transmissive member is easily attached by particles or dust and the like, and the total reflection of the light beam in the light transmissive member is broken. Therefore, before the beam is transmitted to the position where the finger is pressed, a part of the beam is lost, thereby affecting the image quality of the image sensor.
本創作所要解決的技術問題在於，針對現有技術的不足提供一種取像裝置，可以避免因透光件的外表面因附著物而影響成像品質的問題。 The technical problem to be solved by the present invention is to provide an image capturing device for the deficiencies of the prior art, which can avoid the problem that the outer surface of the light transmissive member affects the image quality due to the attachment.
為了解決上述的技術問題，本創作所採用的其中一技術方案是，提供一種取像裝置，其包括：一透光蓋板、一顯示面板、一導光件、一發光元件以及一影像擷取元件。透光蓋板具有與環境介質接觸的一表面，且表面具有一顯示區。顯示面板對應於顯示區而設置於透光蓋板下方。導光件設置於顯示面板與透光蓋板之間。導光件被區分為第一光傳導部、第二光傳導部以及光穿透部，顯示區與光穿透部在一垂直方向上重疊，且第一光傳導部與第二光傳導部分別位於光穿透部的兩相反側。發光元件設置於導光件的其中一側，並用以產生進入第一光傳導部的一感測光束。感測光束在第一光傳導部內被傳遞至光穿透部，以投射到透光蓋板的顯示區，且感測光束的一部分被表面全反射，以形成由光穿透部進入第二光傳導部的一信號光束。影像擷取元件設置於導光件的另一側，以接收在第二光傳導部內被傳遞的信號光束。 In order to solve the above technical problem, one of the technical solutions adopted by the present invention is to provide an image capturing device, comprising: a transparent cover, a display panel, a light guide, a light-emitting component, and an image capture device. element. The light transmissive cover has a surface in contact with the environmental medium, and the surface has a display area. The display panel is disposed under the transparent cover plate corresponding to the display area. The light guide is disposed between the display panel and the transparent cover. The light guiding member is divided into a first light conducting portion, a second light conducting portion, and a light penetrating portion, wherein the display region and the light penetrating portion overlap in a vertical direction, and the first light conducting portion and the second light conducting portion are respectively Located on opposite sides of the light penetrating portion. The illuminating element is disposed on one side of the light guiding member and configured to generate a sensing beam entering the first light guiding portion. The sensing beam is transmitted to the light penetrating portion in the first light conducting portion to be projected to the display area of the transparent cover plate, and a portion of the sensing beam is totally reflected by the surface to form the second light from the light penetrating portion a signal beam of the conducting portion. The image capturing component is disposed on the other side of the light guiding member to receive the signal light beam transmitted in the second light guiding portion.
本創作所採用的另外一技術方案是，提供一種取像裝置，其包括：一透光蓋板、一顯示面板、一第一反射層、一第二反射層、一發光元件以及一影像擷取元件。透光蓋板具有與環境介質接觸的一表面，且表面具有一顯示區。顯示面板設置於透光蓋板下方，並對應於顯示區。顯示面板至少包括一第一基板以及與第一基板結合的一第二基板，第一基板具有朝向透光蓋板的一上表面以及與上表面相對的一下表面。第一反射層設置於上表面，並具有一開口。第二反射層設置於下表面，且第一反射層與第二反射層在第一基板的一厚度方向至少部分重疊。發光元件設置於顯示面板的其中一側，以用於產生所述第一基板的一感測光束。感測光束通過第一反射層與第二反射層而被傳遞至開口，並投射到透光蓋板，且感測光束的一部分被表面全反射，以形成一信號光束。影像擷取元件設置於顯示面板的另一側，以接收信號光束。 Another technical solution adopted by the present invention is to provide an image capturing device, comprising: a transparent cover, a display panel, a first reflective layer, a second reflective layer, a light emitting component, and an image capture device. element. The light transmissive cover has a surface in contact with the environmental medium, and the surface has a display area. The display panel is disposed under the transparent cover and corresponds to the display area. The display panel includes at least a first substrate and a second substrate coupled to the first substrate, the first substrate having an upper surface facing the transparent cover and a lower surface opposite the upper surface. The first reflective layer is disposed on the upper surface and has an opening. The second reflective layer is disposed on the lower surface, and the first reflective layer and the second reflective layer at least partially overlap in a thickness direction of the first substrate. The illuminating element is disposed on one side of the display panel for generating a sensing beam of the first substrate. The sensing beam is transmitted to the opening through the first reflective layer and the second reflective layer, and is projected to the transparent cover plate, and a portion of the sensing beam is totally reflected by the surface to form a signal beam. The image capturing component is disposed on the other side of the display panel to receive the signal beam.
本創作所採用的另外一技術方案是，提供一種取像裝置，其包括：一透光蓋板、一顯示面板、一導光件、一發光元件以及一影像擷取元件。透光蓋板具有與環境介質接觸的一表面，且表面具有一顯示區。顯示面板對應於顯示區設置於透光蓋板下方。導光件設置於顯示面板與透光蓋板之間，其中，所述導光件被區分為一光傳導部以及一光穿透部。發光元件設置於導光件的其中一側，並用以產生進入光傳導部的一感測光束。感測光束在光傳導部內被傳遞至光穿透部，以投射到透光蓋板的所述顯示區，且感測光束的一部分被表面全反射，以形成由光穿透部進入導光件的一信號光束。影像擷取元件設置於導光件的另一側，以接收信號光束。 Another technical solution adopted by the present invention is to provide an image taking device comprising: a transparent cover, a display panel, a light guide, a light-emitting component, and an image capture component. The light transmissive cover has a surface in contact with the environmental medium, and the surface has a display area. The display panel is disposed under the transparent cover plate corresponding to the display area. The light guide is disposed between the display panel and the transparent cover, wherein the light guide is divided into a light conducting portion and a light penetrating portion. The illuminating element is disposed on one side of the light guiding member and configured to generate a sensing beam entering the light guiding portion. The sensing beam is transmitted to the light penetrating portion in the light conducting portion to be projected to the display region of the light transmissive cover plate, and a portion of the sensing beam is totally reflected by the surface to form the light guiding portion entering the light guiding portion a signal beam. The image capturing component is disposed on the other side of the light guiding member to receive the signal beam.
本創作的其中一有益效果在於，本創作所提供的取像裝置，其能通過“設置在顯示面板與透光蓋板之間的導光件被區分一光傳導部以及一光穿透部”或者“在顯示面板的第一基板上下分別設置具有開口的第一反射層以及第二反射層”的技術方案，可以使感 測光束主要在導光件或者第一基板內被傳遞，避免附著在透光蓋板表面的附著物影響成像品質。 One of the beneficial effects of the present invention is that the image capturing device provided by the present invention can be distinguished from a light conducting portion and a light penetrating portion by a light guiding member disposed between the display panel and the transparent cover plate. Or a technical solution of "providing a first reflective layer and a second reflective layer having openings on the upper and lower sides of the first substrate of the display panel" The measuring beam is mainly transmitted in the light guiding member or the first substrate to prevent the attachment attached to the surface of the transparent cover plate from affecting the image quality.
為使能更進一步瞭解本創作的特徵及技術內容，請參閱以下有關本創作的詳細說明與圖式，然而所提供的圖式僅用於提供參考與說明，並非用來對本創作加以限制。 In order to further understand the features and technical contents of this creation, please refer to the following detailed description and drawings of the present invention. However, the drawings are provided for reference and description only, and are not intended to limit the creation.
1、1’、2‧‧‧取像裝置 1, 1', 2‧‧‧ image capture device
10、20‧‧‧透光蓋板 10, 20‧‧‧Transparent cover
10S、20S‧‧‧表面 10S, 20S‧‧‧ surface
F‧‧‧物體 F‧‧‧ objects
SA‧‧‧感測範圍 SA‧‧‧Sensing range
120‧‧‧導光本體 120‧‧‧Lighting body
10A、20A‧‧‧顯示區 10A, 20A‧‧‧ display area
10B、20B‧‧‧非顯示區 10B, 20B‧‧‧ non-display area
11、21‧‧‧顯示面板 11, 21‧‧‧ display panel
12‧‧‧導光件 12‧‧‧Light guides
P1‧‧‧第一光傳導部 P1‧‧‧First Light Conduction Department
P2‧‧‧第二光傳導部 P2‧‧‧Second light transmission department
P3、P3’‧‧‧光穿透部 P3, P3’‧‧‧Light penetration
13、23‧‧‧發光元件 13, 23‧‧‧Lighting elements
14、24‧‧‧影像擷取元件 14, 24‧‧‧Image capture components
111、211‧‧‧第一基板 111, 211‧‧‧ first substrate
112、212‧‧‧第二基板 112, 212‧‧‧ second substrate
CF‧‧‧彩色濾光層 CF‧‧‧ color filter layer
17、27‧‧‧背光組件 17, 27‧‧‧ Backlight assembly
16、16'、26‧‧‧光束定向元件 16, 16', 26‧‧‧ Beam Orienting Components
16S‧‧‧反射表面 16S‧‧‧reflective surface
120a‧‧‧第一表面 120a‧‧‧ first surface
120b‧‧‧第二表面 120b‧‧‧second surface
121、221‧‧‧第一反射層 121, 221‧‧‧ first reflective layer
122、222‧‧‧第二反射層 122, 222‧‧‧ second reflective layer
121h、221h‧‧‧開口 121h, 221h‧‧‧ openings
15、25‧‧‧光學膠 15, 25‧‧‧ optical glue
P1’‧‧‧光傳導部 P1’‧‧‧Light Conducting Department
211a‧‧‧上表面 211a‧‧‧ upper surface
211b‧‧‧下表面 211b‧‧‧ lower surface
W‧‧‧感測範圍最大寬度 W‧‧‧Maximum width of sensing range
W1‧‧‧最大寬度 W1‧‧‧Max width
t1、t2、t3‧‧‧厚度 t 1 , t 2 , t 3 ‧‧‧ thickness
L‧‧‧感測光束 L‧‧‧Sensing beam
L’‧‧‧信號光束 L’‧‧‧Signal beam
θ‧‧‧入射角度 Θ‧‧‧incidence angle
圖1顯示本創作一實施例的取像裝置的俯視示意圖。 Fig. 1 is a top plan view showing an image taking device of an embodiment of the present invention.
圖2顯示本創作一實施例的取像裝置的局部剖面示意圖。 Fig. 2 is a partial cross-sectional view showing the image taking device of an embodiment of the present invention.
圖3顯示本創作另一實施例的光束定向元件的局部放大示意圖。 Fig. 3 is a partially enlarged schematic view showing a beam directing element of another embodiment of the present invention.
圖4顯示本創作一實施例的取像裝置的光穿透部的局部放大示意圖。 Fig. 4 is a partially enlarged schematic view showing a light transmitting portion of the image taking device of the embodiment of the present invention.
圖5顯示本創作另一實施例的取像裝置的局部剖面示意圖。 Fig. 5 is a partial cross-sectional view showing the image taking device of another embodiment of the present invention.
圖6顯示本創作又一實施例的取像裝置的局部剖面示意圖。 Fig. 6 is a partial cross-sectional view showing the image taking device of still another embodiment of the present invention.
以下是通過特定的具體實施例來說明本創作所公開有關“取像裝置”的實施方式，本領域技術人員可由本說明書所公開的內容瞭解本創作的優點與效果。本創作可通過其他不同的具體實施例加以施行或應用，本說明書中的各項細節也可基於不同觀點與應用，在不悖離本創作的構思下進行各種修改與變更。另外，本創作的附圖僅為簡單示意說明，並非依實際尺寸的描繪，事先聲明。以下的實施方式將進一步詳細說明本創作的相關技術內容，但所公開的內容並非用以限制本創作的保護範圍。 The following is a description of an embodiment of the "image taking device" disclosed in the present disclosure by a specific embodiment, and those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in the present specification. The present invention can be implemented or applied in various other specific embodiments. The details of the present specification can also be variously modified and changed without departing from the concept of the present invention. In addition, the drawings of the present creation are only for the purpose of simple illustration, and are not stated in advance according to the actual size. The following embodiments will further explain the related technical content of the present invention, but the disclosure is not intended to limit the scope of protection of the present invention.
應理解，雖然本文中可能使用術語第一、第二、第三等來描述各種元件或者信號，但這些元件或者信號不應受這些術語的限制。這些術語主要是用以區分一元件與另一元件，或者一信號與另一信號。另外，本文中所使用的術語“或”，應視實際情況可能 包括相關聯的列出項目中的任一個或者多個的組合。 It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements or signals, these elements or signals are not limited by these terms. These terms are primarily used to distinguish one element from another, or one signal and another. In addition, the term "or" as used herein shall be considered as the case may be. A combination of any one or more of the associated listed items is included.
請參照圖1至圖2。圖1顯示本創作一實施例的取像裝置的俯視示意圖。圖2顯示本創作一實施例的取像裝置的局部剖面示意圖。本創作實施例提供的取像裝置可應用於一電子產品內，用以擷取一物體F的影像，以進行辨識。前述的電子產品例如是智慧型手機或者是平板電腦。另外，本實施例的取像裝置為屏下取像裝置。 Please refer to FIG. 1 to FIG. 2 . Fig. 1 is a top plan view showing an image taking device of an embodiment of the present invention. Fig. 2 is a partial cross-sectional view showing the image taking device of an embodiment of the present invention. The image capturing device provided in the present embodiment can be applied to an electronic product for capturing an image of an object F for identification. The aforementioned electronic product is, for example, a smart phone or a tablet. Further, the image capturing device of this embodiment is a screen lower image capturing device.
據此，取像裝置1可在一環境介質中使用，環境介質例如是空氣、水或者是其他種類的環境介質。前述的物體F例如是使用者的手指、手掌、手腕或者是眼球，而取像裝置1所擷取的影像例如是指紋、掌紋、靜脈、瞳孔或者是虹膜等影像，但本創作不以此為限。在本創作中，以擷取指紋影像為例，來進一步說明本創作。 Accordingly, the image taking device 1 can be used in an environmental medium such as air, water or other kinds of environmental media. The object F is, for example, a user's finger, a palm, a wrist, or an eyeball, and the image captured by the image capturing device 1 is, for example, a fingerprint, a palm print, a vein, a pupil, or an iris, but the creation is not limit. In this creation, the fingerprint image is taken as an example to further illustrate the creation.
如圖2所示，本創作其中一實施例的取像裝置1包括一透光蓋板10、一顯示面板11、一導光件12、一發光元件13以及一影像擷取元件14。 As shown in FIG. 2, the image capturing apparatus 1 of one embodiment of the present invention includes a transparent cover 10, a display panel 11, a light guide 12, a light-emitting element 13, and an image capturing element 14.
請配合參照圖1以及圖2，透光蓋板10具有與環境介質接觸的一表面10S。在本實施例中，表面10S被定義出一顯示區10A以及一非顯示區10B。 Referring to FIG. 1 and FIG. 2 together, the transparent cover 10 has a surface 10S in contact with the environmental medium. In the present embodiment, the surface 10S defines a display area 10A and a non-display area 10B.
當取像裝置1用以擷取指紋及/或靜脈影像時，透光蓋板10的表面10S可供手指接觸或按壓，以進行偵測及辨識。在本創作實施例中，透光蓋板10的材料可以是剛性材料或者是柔性材料。舉例而言，透光蓋板10的材料可選自玻璃、聚甲基丙烯酸甲酯(polymethymethacrylate,PMMA)或是聚碳酸酯(Polycarbonate,PC)或其他適當的材料。 When the image capturing device 1 is used to capture fingerprints and/or vein images, the surface 10S of the transparent cover 10 can be touched or pressed by a finger for detection and identification. In the present embodiment, the material of the transparent cover 10 may be a rigid material or a flexible material. For example, the material of the transparent cover 10 may be selected from the group consisting of glass, polymethymethacrylate (PMMA) or polycarbonate (PC) or other suitable materials.
在本實施例中，為了讓使用者可通過透光蓋板10看到顯示面板11所顯示的畫面，因此透光蓋板10的材料對於可見光為透明。也就是說，可見光對於透光蓋板10的透射率大於80%。 In this embodiment, in order to allow the user to see the screen displayed by the display panel 11 through the transparent cover 10, the material of the transparent cover 10 is transparent to visible light. That is, the transmittance of visible light to the transparent cover 10 is greater than 80%.
參照圖2，顯示面板11對應於顯示區10A而設置於透光蓋板10下方，以用來顯示畫面。顯示面板11可以是剛性的，換言之，也可以是柔性的面板，所述的顯示面板可以是有機發光二極體顯示面板、液晶顯示面板或者是帶有觸控電極的顯示面板(即具有觸控功能)等等，本創作並不限制。 Referring to FIG. 2, the display panel 11 is disposed below the transparent cover 10 corresponding to the display area 10A for displaying a picture. The display panel 11 can be rigid. In other words, it can also be a flexible panel. The display panel can be an organic light emitting diode display panel, a liquid crystal display panel or a display panel with a touch electrode (ie, having a touch). Function) and so on, this creation is not limited.
在本實施例中，顯示面板11至少包括一第一基板111以及與第一基板111結合的一第二基板112。當顯示面板11為薄膜電晶體液晶顯示面板時，第一基板111為彩色濾光陣列基板。也就是說，顯示面板11還具有一設置於第一基板111上的彩色濾光層CF。第二基板112為薄膜電晶體陣列基板。另外，顯示面板11還進一步包括位於第一基板111與第二基板112之間的顯示介質，例如：液晶層。 In this embodiment, the display panel 11 includes at least a first substrate 111 and a second substrate 112 coupled to the first substrate 111. When the display panel 11 is a thin film transistor liquid crystal display panel, the first substrate 111 is a color filter array substrate. That is, the display panel 11 further has a color filter layer CF disposed on the first substrate 111. The second substrate 112 is a thin film transistor array substrate. In addition, the display panel 11 further includes a display medium, such as a liquid crystal layer, between the first substrate 111 and the second substrate 112.
當顯示面板11為薄膜電晶體液晶顯示面板時，取像裝置1還進一步包括一背光組件17，且顯示面板11設置於背光組件17上。背光組件17包括發光件(圖未示)以及光學膜片組(圖未示)。光學膜片組可用以將發光件所產生的光束均勻地擴散並投射至顯示面板11。在本實施例中，發光件所產生的光束為可見光束。 When the display panel 11 is a thin film transistor liquid crystal display panel, the image capturing device 1 further includes a backlight assembly 17 , and the display panel 11 is disposed on the backlight assembly 17 . The backlight assembly 17 includes a light emitting member (not shown) and an optical film group (not shown). The optical film group can be used to uniformly diffuse and project a light beam generated by the light emitting member to the display panel 11. In this embodiment, the light beam produced by the illuminating member is a visible light beam.
請參照圖2。本實施例的導光件12設置於顯示面板11與透光蓋板10之間。導光件12被區分為一第一光傳導部P1、一第二光傳導部P2以及一光穿透部P3，且第一光傳導部P1與第二光傳導部P2分別位於光穿透部P3的兩相反側。 Please refer to Figure 2. The light guide 12 of the embodiment is disposed between the display panel 11 and the transparent cover 10. The light guide member 12 is divided into a first light conducting portion P1, a second light conducting portion P2, and a light transmitting portion P3, and the first light conducting portion P1 and the second light conducting portion P2 are respectively located in the light transmitting portion. The opposite side of P3.
請配合參照圖1，值得注意的是，在本實施例中，透光蓋板10的顯示區10A與光穿透部P3會在一垂直方向上重疊。另外，第一光傳導部P1與第二光傳導部P2也會在垂直方向上與顯示區10A重疊。 Referring to FIG. 1 together, it is noted that in the present embodiment, the display area 10A of the transparent cover 10 and the light penetrating portion P3 overlap in a vertical direction. Further, the first light guiding portion P1 and the second light guiding portion P2 also overlap the display region 10A in the vertical direction.
進一步而言，在第一光傳導部P1內傳遞的一感測光束L會被傳遞至光穿透部P3，以投射到透光蓋板10的顯示區10A。也就是說，感測光束L在導光件12的第一光傳導部P1內會被至少反射 一次，以被傳遞至光穿透部P3。 Further, a sensing light beam L transmitted in the first light guiding portion P1 is transmitted to the light transmitting portion P3 to be projected to the display region 10A of the transparent cover 10. That is, the sensing light beam L is at least reflected in the first light guiding portion P1 of the light guiding member 12. Once, it is transmitted to the light penetrating portion P3.
感測光束L會通過透光蓋板10的表面10S的全反射，而形成信號光束L’。信號光束L’會再由光穿透部P3進入第二光傳導部P2，並且被至少反射一次而被傳遞至影像擷取元件14。 The sensing beam L passes through the total reflection of the surface 10S of the translucent cover 10 to form a signal beam L'. The signal beam L' is again incident on the second light-conducting portion P2 by the light-transmitting portion P3, and is transmitted to the image capturing member 14 at least once.
請參照圖2，在本實施例中，前述的感測光束L是由發光元件13所產生。發光元件13例如是發光二極體。在本創作實施例中，發光元件13為紅外光發光元件，因此感測光束L為紅外光。在一實施例中，感測光束L的峰值波長可以是落在800nm至900nm的範圍。 Referring to FIG. 2, in the present embodiment, the aforementioned sensing light beam L is generated by the light-emitting element 13. The light-emitting element 13 is, for example, a light-emitting diode. In the present embodiment, the light-emitting element 13 is an infrared light-emitting element, and thus the sensing light beam L is infrared light. In an embodiment, the peak wavelength of the sensing beam L may be in the range of 800 nm to 900 nm.
本創作實施例中，發光元件13設置於導光件12的其中一側，並用以產生進入第一光傳導部P1的感測光束L。也就是說，發光元件13是設置在靠近第一光傳導部P1的一側，並設置於透光蓋板10的非顯示區10B下方。 In the present embodiment, the light-emitting element 13 is disposed on one side of the light guide 12 and is used to generate the sensing light beam L entering the first light-conducting portion P1. That is, the light-emitting element 13 is disposed on the side close to the first light-conducting portion P1 and disposed under the non-display area 10B of the light-transmitting cover 10.
另外，在本實施例中，取像裝置1還包括一光束定向元件16。光束定向元件16可以是一光學透鏡元件、一二次元件、一光柵、一光學微結構層、一繞射元件或其組合，本創作並不限制。光束定向元件16設置於感測光束L的光路上，以調整感測光束L進入第一光傳導部P1的入射角度θ。具體而言，如圖2所示，發光元件13所產生的感測光束L通過光束定向元件16之後，以一預定的入射角度θ進入導光件12。在本實施例中，光束定向元件16設置於發光元件13與導光件12之間。 Further, in the present embodiment, the image taking device 1 further includes a beam directing element 16. The beam directing element 16 can be an optical lens element, a secondary element, a grating, an optical microstructure layer, a diffractive element, or a combination thereof, and the present invention is not limited. The beam directing element 16 is disposed on the optical path of the sensing light beam L to adjust the incident angle θ of the sensing light beam L into the first light conducting portion P1. Specifically, as shown in FIG. 2, the sensing light beam L generated by the light-emitting element 13 passes through the light beam directing element 16 and enters the light guide 12 at a predetermined incident angle θ. In the present embodiment, the beam directing element 16 is disposed between the light emitting element 13 and the light guide 12.
然而，只要能達到上述目的，本創作並不限制光束定向元件16的結構以及位置。請參照圖3，顯示本創作另一實施例的光束定向元件的局部放大示意圖。在本實施例中，光束定向元件16’為光學微結構，且光束定向元件16’具有一反射表面16S。 However, this creation does not limit the structure and position of the beam directing element 16 as long as the above objectives are achieved. Referring to FIG. 3, a partial enlarged view of a beam directing element of another embodiment of the present invention is shown. In the present embodiment, beam directing element 16' is an optical microstructure and beam directing element 16' has a reflective surface 16S.
本實施例的光束定向元件16’是設置在導光件12上，且反射表面16S會對應於發光元件13的出光面。據此，發光元件13所產生的感測光束L先經光束定向元件16’入射至導光件12之後， 投射至反射表面16S。隨後，感測光束L再通過反射表面16S的反射，以一預設入射角度θ進入第一光傳導部P1，其中所述的入射角度是介於45度至55度之間。 The beam directing element 16' of the present embodiment is disposed on the light guiding member 12, and the reflecting surface 16S corresponds to the light emitting surface of the light emitting element 13. Accordingly, the sensing light beam L generated by the light-emitting element 13 is first incident on the light guiding member 12 via the beam directing element 16'. Projected to the reflective surface 16S. Subsequently, the sensing beam L is further reflected by the reflecting surface 16S to enter the first light conducting portion P1 at a predetermined incident angle θ, wherein the incident angle is between 45 degrees and 55 degrees.
請再配合參照圖1與圖2，影像擷取元件14設置於導光件12的另一側，以接收在第二光傳導部P2內被傳遞的信號光束L’。詳細而言，影像擷取元件14是設置在靠近第二光傳導部P2的一側，且位於透光蓋板10的非顯示區10B下方。此外，須說明的是，本創作的任一釋例性說明的可行實施例中，影像擷取元件14與導光件12之間設置有一帶通濾波層。 1 and 2, the image capturing element 14 is disposed on the other side of the light guiding member 12 to receive the signal light beam L' transmitted in the second light guiding portion P2. In detail, the image capturing element 14 is disposed on a side close to the second light guiding portion P2 and is located below the non-display area 10B of the transparent cover 10. In addition, it should be noted that in a possible embodiment of any of the illustrative embodiments of the present invention, a band pass filter layer is disposed between the image capturing element 14 and the light guiding member 12.
影像擷取元件14接收信號光束L’之後，將信號光束L’轉換為電訊號。換言之，影像擷取元件14為一種光電轉換元件，例如是電荷耦合元件(Charge Coupled Device,CCD)或是互補式金屬氧化物半導體元件(Complementary Metal-Oxide Semiconductor,CMOS)。然而，在其他實施例中，影像擷取元件14也可以使用其他影像感測器。 After receiving the signal beam L', the image capturing element 14 converts the signal beam L' into an electrical signal. In other words, the image capturing element 14 is a photoelectric conversion element, such as a Charge Coupled Device (CCD) or a Complementary Metal-Oxide Semiconductor (CMOS). However, in other embodiments, the image capture component 14 can also use other image sensors.
基於上述，當物體F(如：手指)接觸透光蓋板10的表面10S時，手指的凸紋接觸到表面10S，會使一部分投射到表面10S的感測光束L無法產生全反射，從而使影像擷取元件14取得對應手指凸紋的暗紋。另一方面，手指的凹紋並未接觸到透光蓋板10的表面10S，而使另一部分感測光束L仍可被全反射而形成信號光束L’。信號光束L’被第二光傳導部P2反射而被影像擷取元件14所接收。之後，再通過一影像處理元件對所接收到的信號光束L’進行影像處理，可以得到明暗相間的指紋影像。 Based on the above, when the object F (eg, a finger) contacts the surface 10S of the transparent cover 10, the convex ridge of the finger contacts the surface 10S, so that a part of the sensing light beam L projected onto the surface 10S cannot generate total reflection, thereby making The image capturing element 14 obtains a dark line corresponding to the finger relief. On the other hand, the concave of the finger does not contact the surface 10S of the translucent cover 10, and the other portion of the sensing beam L can still be totally reflected to form the signal beam L'. The signal beam L' is reflected by the second light guiding portion P2 and received by the image capturing element 14. Thereafter, the received signal beam L' is subjected to image processing by an image processing element to obtain a fingerprint image between the light and dark.
值得注意的是，由於光穿透部P3的尺寸限制，感測光束L只能投射到顯示區10A的局部範圍。相似地，感測光束L只有在特定範圍被全反射所形成的信號光束L’才會再進入光穿透部P3，而被第二光傳導部P2傳遞至影像擷取元件14。 It is to be noted that the sensing light beam L can only be projected to a partial range of the display area 10A due to the size limitation of the light penetrating portion P3. Similarly, the signal beam L' formed only by the total reflection of the sensing beam L in a specific range re-enters the light transmitting portion P3, and is transmitted to the image capturing member 14 by the second light guiding portion P2.
據此，如圖1所示，在本創作實施例中，顯示區10A會具有 對應於光穿透部P3的感測範圍SA。因此，只有位於感測範圍SA內的物體F，才會被感測光束L照射，並形成由光穿透部P3第二光傳導部P2的信號光束L’。換句話說，當使用者將手指放置在感測範圍SA之外的其他區域時，影像擷取元件14並不會接收到信號光束L’。 Accordingly, as shown in FIG. 1, in the present creative embodiment, the display area 10A will have Corresponding to the sensing range SA of the light penetrating portion P3. Therefore, only the object F located in the sensing range SA is irradiated by the sensing beam L, and the signal beam L' of the second light guiding portion P2 of the light transmitting portion P3 is formed. In other words, when the user places a finger in another area outside the sensing range SA, the image capturing element 14 does not receive the signal beam L'.
據此，通過限制導光件12的光穿透部P3大小、位置以及感測光束L的入射角度θ，可以定義出感測範圍SA的大小以及位置。在本實施例中，光穿透部P3的最大寬度會大於感測範圍SA的最大寬度。 According to this, by limiting the size and position of the light penetrating portion P3 of the light guide member 12 and the incident angle θ of the sensing light beam L, the magnitude and position of the sensing range SA can be defined. In the present embodiment, the maximum width of the light penetrating portion P3 may be greater than the maximum width of the sensing range SA.
請參照圖2以及圖4，其中圖4顯示本創作一實施例的取像裝置的光穿透部的局部放大示意圖。本創作實施例中，導光件12包括一導光本體120、第一反射層121以及第二反射層122。導光本體120具有第一表面120a以及與第一表面120a相對的一第二表面120b，且導光本體120是以第一表面120a朝向透光蓋板10設置。 Referring to FIG. 2 and FIG. 4, FIG. 4 is a partially enlarged schematic view showing a light transmitting portion of the image capturing apparatus according to an embodiment of the present invention. In the present embodiment, the light guide 12 includes a light guiding body 120, a first reflective layer 121, and a second reflective layer 122. The light guiding body 120 has a first surface 120a and a second surface 120b opposite to the first surface 120a, and the light guiding body 120 is disposed with the first surface 120a facing the transparent cover 10.
在本創作實施例中，第一反射層121設置於第一表面120a，並具有一開口121h，而第二反射層122是設置於第二表面120b。換句話說，第一反射層121與第二反射層122是分別位於導光本體120的兩相反側。 In the present embodiment, the first reflective layer 121 is disposed on the first surface 120a and has an opening 121h, and the second reflective layer 122 is disposed on the second surface 120b. In other words, the first reflective layer 121 and the second reflective layer 122 are respectively located on opposite sides of the light guiding body 120.
如圖2所示，第一反射層121與第二反射層122在垂直方向彼此重疊，以至少定義出前述的第一光傳導部P1以及第二光傳導部P2。另外，第一反射層121的開口121h與第二反射層122在垂直方向彼此重疊，以定義出前述的光穿透部P3。另外，開口121h與顯示區10A在導光本體120的厚度方向上彼此重疊。 As shown in FIG. 2, the first reflective layer 121 and the second reflective layer 122 overlap each other in the vertical direction to define at least the first light conducting portion P1 and the second light conducting portion P2 described above. In addition, the opening 121h of the first reflective layer 121 and the second reflective layer 122 overlap each other in the vertical direction to define the aforementioned light penetrating portion P3. In addition, the opening 121h and the display region 10A overlap each other in the thickness direction of the light guiding body 120.
在一實施例中，第一反射層121的折射係數與第二反射層122的折射係數都低於導光本體120的折射係數。舉例而言，若是導光本體120的折射係數nL大約是1.4，第一反射層121與第二反射層122的材料可以選擇折射係數nR小於1.4的材料，例如：甲 基低折射矽膠。通過控制感測光束L進入導光本體120的入射角度θ，可以使感測光束L在導光本體120被多次全反射。 In an embodiment, the refractive index of the first reflective layer 121 and the refractive index of the second reflective layer 122 are both lower than the refractive index of the light guiding body 120. For example, if the refractive index n L of the light guiding body 120 is about 1.4, the material of the first reflective layer 121 and the second reflective layer 122 may select a material having a refractive index n R of less than 1.4, for example, a methyl low refractive silicone. By controlling the incident angle θ of the sensing beam L into the light guiding body 120, the sensing beam L can be totally reflected multiple times in the light guiding body 120.
據此，在本實施例中，進入第一光傳導部P1的感測光束L會通過至少一次全反射，而被傳遞至光穿透部。相似地，通過光穿透部P3進入第二光傳導部P2的信號光束L’也可通過至少一次全反射，而被影像擷取元件14所接收。 Accordingly, in the present embodiment, the sensing light beam L entering the first light-conducting portion P1 is transmitted to the light-transmitting portion by at least one total reflection. Similarly, the signal light beam L' entering the second light-conducting portion P2 through the light-transmitting portion P3 can also be received by the image capturing element 14 by at least one total reflection.
假設第一反射層121與第二反射層122的折射係數相同。第一反射層121(或第二反射層122)的折射係數nR、導光本體120的折射係數nL以及感測光束L進入導光本體120的入射角度θ滿足下列關係式：θ>sin-1(nL/nR)。 It is assumed that the refractive indices of the first reflective layer 121 and the second reflective layer 122 are the same. The refractive index n R of the first reflective layer 121 (or the second reflective layer 122), the refractive index n L of the light guiding body 120, and the incident angle θ of the sensing light beam L into the light guiding body 120 satisfy the following relationship: θ>sin -1 (n L /n R ).
如圖2所示，本實施例的取像裝置1還進一步包括一光學膠15。光學膠15位於第一反射層121與透光蓋板10之間，且光學膠15的一部份填入開口121h內。 As shown in FIG. 2, the image taking device 1 of the embodiment further includes an optical glue 15. The optical adhesive 15 is located between the first reflective layer 121 and the transparent cover 10, and a portion of the optical adhesive 15 is filled into the opening 121h.
在本實施例中，通過選擇適合的材料，使光學膠15的折射係數、導光本體120的折射係數以及透光蓋板10的折射係數大致相同。據此，可避免感測光束L從光穿透部P3進入透光蓋板10或者信號光束L’由光穿透部再進入導光本體120時被折射。 In the present embodiment, the refractive index of the optical adhesive 15, the refractive index of the light guiding body 120, and the refractive index of the transparent cover 10 are substantially the same by selecting a suitable material. According to this, it is possible to prevent the sensing light beam L from entering the light-transmitting cover plate 10 from the light-transmitting portion P3 or the signal light beam L' being refracted when the light-transmitting portion re-enters the light-guiding body 120.
本實施例的取像裝置1還包括另一設置於顯示面板11與導光件12之間的光學膠15，以使導光件12可通過光學膠15與顯示面板11結合。 The image capturing device 1 of the present embodiment further includes another optical adhesive 15 disposed between the display panel 11 and the light guide 12 such that the light guide 12 can be coupled to the display panel 11 through the optical adhesive 15.
另外，參照圖4，光穿透部P3對應於顯示區10A的一感測範圍SA，且感測範圍SA的一最大寬度W小於光穿透部P3的一最大寬度，也就是小於開口121h的最大寬度W1。 In addition, referring to FIG. 4, the light transmitting portion P3 corresponds to a sensing range SA of the display area 10A, and a maximum width W of the sensing range SA is smaller than a maximum width of the light transmitting portion P3, that is, smaller than the opening 121h. Maximum width W1.
進一步而言，如圖4所示，在本實施例中，開口121h的一最大寬度W1，感測範圍SA的最大寬度W，導光本體120的厚度t1，導光本體120與透光蓋板10之間的最短垂直距離t2(也就是位於開口121h內的光學膠15的厚度)，透光蓋板10的厚度t3，以及感測光束L的入射角度θ滿足下列關係式：2(t1+t2+t3)tanθ> W1>W+2(t2+t3)tanθ。 Further, as shown in FIG. 4, in the present embodiment, a maximum width W1 of the opening 121h, a maximum width W of the sensing range SA, a thickness t 1 of the light guiding body 120, the light guiding body 120 and the transparent cover The shortest vertical distance t 2 between the plates 10 (that is, the thickness of the optical glue 15 located in the opening 121h), the thickness t 3 of the transparent cover 10, and the incident angle θ of the sensing beam L satisfy the following relationship: (t 1 + t 2 + t 3 ) tan θ > W1 > W + 2 (t 2 + t 3 ) tan θ.
須說明的是，在本實施例中，取像裝置1的背光組件17用以產生可見光束。因此，可見光束對導光件12以及透光蓋板10透射率大於80%，以讓使用者可在顯示區10A看到由顯示面板11所顯示的畫面。 It should be noted that in the present embodiment, the backlight assembly 17 of the image taking device 1 is used to generate a visible light beam. Therefore, the transmittance of the visible light beam to the light guide member 12 and the transparent cover plate 10 is greater than 80%, so that the user can see the screen displayed by the display panel 11 in the display area 10A.
在另一實施例中，感測光束L為紅外光，第一反射層121與第二反射層122都是紅外光反射膜。值得注意的是，第一反射層121與第二反射層122可以選擇對紅外光具有高反射率，但是對可見光具有高穿透率的材料。 In another embodiment, the sensing beam L is infrared light, and the first reflective layer 121 and the second reflective layer 122 are both infrared light reflecting films. It is to be noted that the first reflective layer 121 and the second reflective layer 122 may select materials having high reflectance for infrared light but high transmittance for visible light.
舉例而言，紅外光反射膜可以是將高折射率材料層與低折射率材料層交替堆疊而形成的介電質多層膜。常見的高折射率材料如氧化鈦系(TiO2,Ti3O5)或氧化鉭(Ta2O5)，低折射率材料如氧化矽系(SiO2)或氟化鎂(MgF2)，有時還會搭配中折射材料如氧化鋁(Al2O3)或氧化鋯(ZrO2)。 For example, the infrared light reflecting film may be a dielectric multilayer film formed by alternately stacking a high refractive index material layer and a low refractive index material layer. Common high refractive index materials such as titanium oxide (TiO 2 , Ti 3 O 5 ) or tantalum oxide (Ta 2 O 5 ), low refractive index materials such as lanthanum oxide (SiO 2 ) or magnesium fluoride (MgF 2 ), Sometimes with a medium refractive material such as alumina (Al 2 O 3 ) or zirconia (ZrO 2 ).
須說明的是，只要能使感測光束L以及信號光束L’在第一光傳導部P1以及第二光傳導部P2內傳遞，本創作並不限制於上述實施例。舉例而言，在其他實施例中，第一反射層121與第二反射層122的其中一層為紅外光反射膜，而另一層選擇折射係數低於導光本體120的折射係數的材料，並配合控制感測光束L投射到第一反射層121或者第二反射層122的入射角度θ，也可以達到本創作之目的。 It should be noted that the present invention is not limited to the above embodiment as long as the sensing beam L and the signal beam L' can be transmitted in the first light guiding portion P1 and the second light guiding portion P2. For example, in other embodiments, one of the first reflective layer 121 and the second reflective layer 122 is an infrared light reflecting film, and the other layer selects a material whose refractive index is lower than the refractive index of the light guiding body 120, and cooperates with Controlling the incident angle θ of the sensing beam L onto the first reflective layer 121 or the second reflective layer 122 can also achieve the purpose of the present invention.
相較於現有的指紋辨識裝置，本創作實施例中，通過第一反射層121以及第二反射層122的配合，可以使感測光束L與信號光束L’主要是在透光蓋板10下方的導光本體120內傳遞。另外，通過具有開口121h的第一反射層121，可在透光蓋板10的顯示區10A定義出特定的感測範圍SA。因此，可以避免透光蓋板10的表面10S的髒汙造成感測光束L的強度降低，而使取像品質降低的問題。 Compared with the existing fingerprint identification device, in the present embodiment, by the cooperation of the first reflective layer 121 and the second reflective layer 122, the sensing beam L and the signal beam L' can be mainly under the transparent cover plate 10. Passed inside the light guiding body 120. In addition, a specific sensing range SA can be defined in the display region 10A of the transparent cover 10 by the first reflective layer 121 having the opening 121h. Therefore, it is possible to prevent the contamination of the surface 10S of the translucent cover 10 from causing a decrease in the intensity of the sensing light beam L, which causes a problem of lowering the image quality.
請參照圖5，其顯示本創作另一實施例的取像裝置的局部剖面示意圖。本實施例的取像裝置1’與前一實施例的取像裝置1相同的元件具有相同或者相似的標號，且相同的部分不再贅述。 Referring to FIG. 5, a partial cross-sectional view of the image taking device of another embodiment of the present invention is shown. The same components of the image capturing device 1' of the present embodiment as those of the image capturing device 1 of the previous embodiment have the same or similar reference numerals, and the same portions will not be described again.
在本實施例中，第一反射層121的開口121h在垂直方向上與顯示區10A以及非顯示區10B重疊。進一步而言，開口121h會由顯示面板11上方延伸至影像擷取元件14上方。 In the present embodiment, the opening 121h of the first reflective layer 121 overlaps the display area 10A and the non-display area 10B in the vertical direction. Further, the opening 121h extends from above the display panel 11 to above the image capturing element 14.
據此，本實施例的導光件12可被區分為一光傳導部P1’以及一光穿透部P3’。在俯視方向上，光穿透部P3’會與顯示區10A以及影像擷取元件14上方的非顯示區10B重疊。 Accordingly, the light guiding member 12 of the present embodiment can be divided into a light conducting portion P1' and a light penetrating portion P3'. In the plan view, the light penetrating portion P3' overlaps the display region 10A and the non-display region 10B above the image capturing member 14.
另外，發光元件13鄰近於光傳導部P1’設置，而影像擷取元件14鄰近於光穿透部P3設置。據此，發光元件13所產生的感測光束L可通過光傳導部P1’傳遞至光穿透部P3’。 Further, the light-emitting element 13 is disposed adjacent to the light-conducting portion P1', and the image-capturing element 14 is disposed adjacent to the light-transmitting portion P3. According to this, the sensing light beam L generated by the light-emitting element 13 can be transmitted to the light-transmitting portion P3' through the light-conducting portion P1'.
另外，感測光束L在感測範圍SA被全反射之後所形成信號光束L’可直接通過光穿透部P3’進入影像擷取元件14，而不需要再經過多次反射才能進入影像擷取元件14。因此，在本實施例的取像裝置1’可避免信號光束L’在傳遞過程中的損失。 In addition, the signal beam L′ formed after the sensing beam L is totally reflected by the sensing range SA can directly enter the image capturing component 14 through the light penetrating portion P3′, and does not need to undergo multiple reflections to enter the image capturing device. Element 14. Therefore, the image pickup device 1' of the present embodiment can avoid the loss of the signal light beam L' during the transfer.
請參照圖6，顯示本創作又一實施例的取像裝置的局部剖面示意圖。本創作實施例的取像裝置2包括透光蓋板20、顯示面板21、第一反射層221、第二反射層222、發光元件23以及影像擷取元件24。 Referring to FIG. 6, a partial cross-sectional view of an image taking device according to still another embodiment of the present invention is shown. The image capturing device 2 of the present embodiment includes a transparent cover 20, a display panel 21, a first reflective layer 221, a second reflective layer 222, a light-emitting element 23, and an image capturing element 24.
與圖2的實施例相似，透光蓋板20具有與環境介質接觸的表面20，且表面20被定義出一顯示區20A以及一非顯示區20B。 Similar to the embodiment of Figure 2, the light transmissive cover 20 has a surface 20 that is in contact with an environmental medium, and the surface 20 defines a display area 20A and a non-display area 20B.
在本實施例中，是通過顯示面板21的第一基板211來傳導感測光束L以及信號光束L’。因此，第一反射層221與第二反射層222是設置在顯示面板21的第一基板211的兩相反表面。 In the present embodiment, the sensing beam L and the signal beam L' are conducted through the first substrate 211 of the display panel 21. Therefore, the first reflective layer 221 and the second reflective layer 222 are opposite surfaces of the first substrate 211 disposed on the display panel 21.
具體而言，顯示面板21的第一基板211具有朝向透光蓋板10的一上表面211a以及與上表面211a相對的一下表面211b。具有開口121h的第一反射層221是設置於上表面211a，而第二反射層 222是設置於下表面211b。 Specifically, the first substrate 211 of the display panel 21 has an upper surface 211a facing the transparent cover 10 and a lower surface 211b opposite to the upper surface 211a. The first reflective layer 221 having the opening 121h is disposed on the upper surface 211a, and the second reflective layer 222 is disposed on the lower surface 211b.
第一反射層221與第二反射層222在第一基板211的厚度方向至少部分重疊。因此，第一反射層221與第二反射層222重疊的部分會在第一基板211定義出第一光傳導部P1以及第二光傳導部P2。另外，開口221h與第二反射層222重疊的部分會在第一基板111內定義出光穿透部P3。第一光傳導部P1與第二光傳導部P2是分別位於光穿透部P3的兩相反側。 The first reflective layer 221 and the second reflective layer 222 at least partially overlap in the thickness direction of the first substrate 211. Therefore, the portion where the first reflective layer 221 overlaps the second reflective layer 222 defines the first light-conducting portion P1 and the second light-conducting portion P2 on the first substrate 211. In addition, a portion where the opening 221h overlaps with the second reflective layer 222 defines a light penetrating portion P3 in the first substrate 111. The first light guiding portion P1 and the second light guiding portion P2 are respectively located on opposite sides of the light transmitting portion P3.
另外，在本實施例中，第一反射層221的開口221h只與顯示區20A相互重疊。然而，在其他實施例中，第一反射層221的開口221h也可以同時與顯示區20A以及非顯示區20B重疊，或者是只與非顯示區20B重疊。 In addition, in the present embodiment, the opening 221h of the first reflective layer 221 overlaps only the display area 20A. However, in other embodiments, the opening 221h of the first reflective layer 221 may also overlap the display area 20A and the non-display area 20B at the same time, or only overlap the non-display area 20B.
發光元件23設置於顯示面板21的其中一側，以用於產生進入第一基板211的一感測光束L。感測光束L通過第一反射層221與第二反射層222而被傳遞至開口221h，並投射到透光蓋板20。感測光束L被透光蓋板20的表面20全反射，以形成信號光束L’。 The light emitting element 23 is disposed on one side of the display panel 21 for generating a sensing light beam L entering the first substrate 211. The sensing light beam L is transmitted to the opening 221h through the first reflective layer 221 and the second reflective layer 222, and is projected to the transparent cover plate 20. The sensing beam L is totally reflected by the surface 20 of the translucent cover 20 to form a signal beam L'.
影像擷取元件24設置於顯示面板21的另一側，以接收信號光束L’。在本實施例中，信號光束L’通過開口221h進入第一基板211之後，會在第二光傳導部P2內被傳遞至影像擷取元件24。然而，在其他實施例中，當開口221h位置鄰近於影像擷取元件24上方時，信號光束L’可直接通過開口221h進入影像擷取元件24。第一反射層221與第二反射層222的材料選擇，以及開口221h的最大寬度W1可參照先前的說明，在此不再重複說明。 The image capturing element 24 is disposed on the other side of the display panel 21 to receive the signal beam L'. In the present embodiment, after the signal light beam L' enters the first substrate 211 through the opening 221h, it is transmitted to the image capturing element 24 in the second light conducting portion P2. However, in other embodiments, when the opening 221h is positioned adjacent to the image capturing element 24, the signal beam L' can enter the image capturing element 24 directly through the opening 221h. The material selection of the first reflective layer 221 and the second reflective layer 222, and the maximum width W1 of the opening 221h can be referred to the previous description, and the description thereof will not be repeated here.
需說明的是，在本實施例中，當顯示面板21為薄膜電晶體液晶顯示面板時，顯示面板21還包括一彩色濾光層CF。彩色濾光層CF會設置在第一基板211的下表面211b，並覆蓋第二反射層222。換句話說，第二反射層222是位於彩色濾光層CF與第一基板211之間。 It should be noted that, in the embodiment, when the display panel 21 is a thin film transistor liquid crystal display panel, the display panel 21 further includes a color filter layer CF. The color filter layer CF is disposed on the lower surface 211b of the first substrate 211 and covers the second reflective layer 222. In other words, the second reflective layer 222 is located between the color filter layer CF and the first substrate 211.
此外，取像裝置2還可進一步包括一用以產生一可見光束的 背光組件27。與先前的實施例相似，顯示面板21設置於背光組件27上。另外，可見光束對第一反射層221、第二反射層222以及透光蓋板20的透射率大於80%。然而，在其他實施例中，當顯示面板21為有機發光二極體面板時，背光組件27也可以被省略。 In addition, the image capturing device 2 may further include a light source for generating a visible light beam. The backlight assembly 27. Similar to the previous embodiment, the display panel 21 is disposed on the backlight assembly 27. In addition, the transmittance of the visible light beam to the first reflective layer 221, the second reflective layer 222, and the transparent cover 20 is greater than 80%. However, in other embodiments, when the display panel 21 is an organic light emitting diode panel, the backlight assembly 27 may also be omitted.
另外，本創作所有實施例中的用語”光傳導部”、”第一光傳導部”或是”第二光傳導部”是指導光件12或者第一基板211可允許感測光束L以及信號光束L’傳遞的部份，而”光穿透部”是指導光件12或者第一基板211中，可允許感測光束L以及信號光束L’進出其他元件的部分。 In addition, the terms "light-conducting portion", "first light-conducting portion" or "second light-conducting portion" in all embodiments of the present invention are for guiding the light member 12 or the first substrate 211 to allow the sensing beam L and the signal. The portion of the light beam L' is transmitted, and the "light penetrating portion" is a portion of the light guide member 12 or the first substrate 211 that allows the sensing beam L and the signal beam L' to enter and exit other components.
因此，當感測光束L以及信號光束L’為紅外光時，”光傳導部”、”第一光傳導部”或是”第二光傳導部”都是指導光件12或者第一基板211傳導紅外光之部分，而”光穿透部”是指導光件12或者第一基板211可使紅外光穿透的部分。 Therefore, when the sensing beam L and the signal beam L′ are infrared light, the “light conducting portion”, the “first light conducting portion” or the “second light conducting portion” are both guiding the light member 12 or the first substrate 211 . The portion that conducts infrared light, and the "light-transmitting portion" is a portion that guides the light member 12 or the first substrate 211 to allow infrared light to penetrate.
也就是說，取像裝置1、1’、2的背光組件17、27或者由顯示面板11、21本身所產生的可見光束，並不會在“光傳導部”、“第一光傳導部”或是“第二光傳導部”被反射，而影響使用者觀看顯示畫面。 That is to say, the backlight units 17 and 27 of the image taking devices 1, 1', 2 or the visible light beams generated by the display panels 11, 21 themselves are not in the "light conducting portion" or the "first light conducting portion". Or the "second light conducting portion" is reflected, which affects the user viewing the display screen.
另外，本創作實施例的取像裝置1、1’、2還可進一步包括一帶通濾波層(圖未示)。在圖2以及圖5所示的實施例中，帶通濾波層可設置於影像擷取元件14與導光件12之間，用以過濾信號光束L’以外的雜散光。 Further, the image capturing device 1, 1', 2 of the present embodiment may further include a band pass filter layer (not shown). In the embodiment shown in Figures 2 and 5, a band pass filter layer can be disposed between the image capture element 14 and the light guide 12 for filtering stray light other than the signal beam L'.
舉例而言，當信號光束L’為紅外光時，帶通濾波層對於信號光束L’的穿透率至少大於80%，而對可見光以及紫外光的穿透率是低於20%。進一步而言，帶通濾波層可為紅外帶通濾光層，而可允許波長落在800nm至900nm的範圍之內的光束通過，並可過濾波長落在800nm至900nm的範圍以外的光束。在其他實施例中，帶通濾波層可允許波長落在840nm至860nm的範圍之內的光束，或者允許波長落在890nm至990nm的另一範圍之內的 光束通過。 For example, when the signal beam L' is infrared light, the bandpass filter layer has a transmittance of at least 80% for the signal beam L' and less than 20% for visible light and ultraviolet light. Further, the band pass filter layer may be an infrared band pass filter layer, and may allow a light beam having a wavelength falling within a range of 800 nm to 900 nm to pass, and may filter a light beam having a wavelength falling outside the range of 800 nm to 900 nm. In other embodiments, the bandpass filter layer may allow a beam of light to fall within the range of 840 nm to 860 nm, or allow the wavelength to fall within another range of 890 nm to 990 nm. The beam passes through.
在圖6的實施例中，帶通濾波層可設置於影像擷取元件24以及第一基板211之間。如此，帶通濾波層可避免環境光、顯示面板11、21或背光組件17、27所產生的光束進入影像擷取元件14、24，造成信號干擾。據此，通過設置帶通濾波層，可提升取像裝置1、1’、2的辨識精準度。 In the embodiment of FIG. 6, a band pass filter layer may be disposed between the image capture element 24 and the first substrate 211. As such, the band pass filter layer can prevent ambient light, the light beams generated by the display panels 11, 21 or the backlight assemblies 17, 27 from entering the image capture elements 14, 24, causing signal interference. According to this, by providing the band pass filter layer, the recognition accuracy of the image taking devices 1, 1', 2 can be improved.
綜上所述，本創作的其中一有益效果在於，本創作所提供的取像裝置1、1’、2，其通過“設置在顯示面板與透光蓋板之間的導光件被區分一光傳導部以及一光穿透部”或者“在顯示面板的第一基板上下分別設置具有開口的第一反射層以及第二反射層”的技術方案，可以使感測光束L主要在透光蓋板10、20下方的導光件12或者第一基板211內被傳遞，並可通過第一反射層121、221的開口121h、221h定義出感測範圍SA，可避免附著在透光蓋板10、20表面10S、20S的附著物影響成像品質。 In summary, one of the beneficial effects of the present invention is that the image capturing device 1, 1', 2 provided by the present invention is distinguished by a light guiding member disposed between the display panel and the transparent cover. The light-conducting portion and a light-transmitting portion or the "first reflective layer and the second reflective layer having openings on the upper and lower sides of the first substrate of the display panel" can make the sensing light beam L mainly in the transparent cover The light guide 12 or the first substrate 211 under the boards 10 and 20 is transferred, and the sensing range SA is defined by the openings 121h and 221h of the first reflective layers 121 and 221 to avoid adhesion to the transparent cover 10 , 20 surface 10S, 20S attachments affect imaging quality.
進一步而言，相較於現有的指紋辨識裝置，本創作實施例中，主要是利用透光蓋板10、20下方的導光件12或是顯示面板21的第一基板211來傳遞感測光束L以及信號光束L’，因此可以避免透光蓋板10、20的表面10S、20S的髒汙造成感測光束L的強度降低。據此，本創作實施例的取像裝置1、1’、2可具有較佳的取像品質。 Further, in the present embodiment, the light guide member 12 under the transparent cover plates 10 and 20 or the first substrate 211 of the display panel 21 is used to transmit the sensing beam. L and the signal beam L', so that the contamination of the surfaces 10S, 20S of the transparent cover sheets 10, 20 can be prevented from causing a decrease in the intensity of the sensing beam L. Accordingly, the image taking devices 1, 1', 2 of the present embodiment can have better image taking quality.
以上所公開的內容僅為本創作的優選可行實施例，並非因此侷限本創作的申請專利範圍，所以凡是運用本創作說明書及圖式內容所做的等效技術變化，均包含於本創作的申請專利範圍內。 The above disclosure is only a preferred and feasible embodiment of the present invention, and is not intended to limit the scope of the patent application of the present invention. Therefore, any equivalent technical changes made by using the present specification and the content of the schema are included in the application for this creation. Within the scope of the patent.
Claims (25)
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| US201762574222P | 2017-10-19 | 2017-10-19 | |
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| TWI737430B (en) * | 2020-07-24 | 2021-08-21 | 大陸商業成科技（成都）有限公司 | Light-emitting component, method for making the same, and electronic device using the same |
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| CN110487515A (en) * | 2019-08-31 | 2019-11-22 | 深圳阜时科技有限公司 | A kind of optical detection apparatus and electronic equipment |
| CN112099259A (en) * | 2020-10-15 | 2020-12-18 | 武汉华星光电技术有限公司 | Liquid crystal display module and liquid crystal display device |
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| TWI737430B (en) * | 2020-07-24 | 2021-08-21 | 大陸商業成科技（成都）有限公司 | Light-emitting component, method for making the same, and electronic device using the same |
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