TWI822035B - Optical fingerprint recognition device - Google Patents

Optical fingerprint recognition device Download PDF

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TWI822035B
TWI822035B TW111117351A TW111117351A TWI822035B TW I822035 B TWI822035 B TW I822035B TW 111117351 A TW111117351 A TW 111117351A TW 111117351 A TW111117351 A TW 111117351A TW I822035 B TWI822035 B TW I822035B
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organic light
layer
emitting diode
light
optical fingerprint
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TW111117351A
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TW202344962A (en
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林哲玄
湯啟中
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敦泰電子股份有限公司
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Abstract

An optical fingerprint recognition device includes a light-emitting layer and a color filter layer. The light-emitting layer has a plurality of red OLEDs, a plurality of green OLEDs and a plurality of blue OLEDs. An opaque pixel define layer is arranged between two adjacent OLEDs, and the pixel define layer is provided with an opening. The color filter layer has a plurality of red filters, a plurality of green filters and a plurality of blue filters. The red filters respectively correspond to the red OLEDs in position, the green filters respectively correspond to the green OLEDs in position, and the blue filters respectively correspond to the blue OLEDs in position. A black matrix corresponding to the pixel define layer is filled between two adjacent filters respectively corresponding to two adjacent OLEDs.

Description

光學指紋辨識裝置 Optical fingerprint recognition device

本發明係關於一種光學指紋顯示裝置,尤指一種可提升面板的穿透率且同時消除環境光干擾的光學指紋辨識裝置。 The present invention relates to an optical fingerprint display device, and in particular, to an optical fingerprint recognition device that can improve the transmittance of a panel and eliminate ambient light interference at the same time.

傳統有機發光二極體(OLED)面板內部會使用偏振片層來消除環境光所引起的視覺上的干擾,如圖1所示,當外部的環境光10穿過保護玻璃15入射至面板內部的兩相鄰有機發光二極體17之間時,將因遇到面板中的薄膜電晶體層11的金屬材質而產生反射光,因而可能導致對人眼的干擾,因此,傳統OLED面板內部會設置有一偏振層13以用來消除環境光10入射至面板中的金屬材質造成的反射光,然而,此偏振層13的設置卻使得面板厚度無法降低,不利於產品的薄型化。 A polarizer layer is used inside a traditional organic light-emitting diode (OLED) panel to eliminate visual interference caused by ambient light. As shown in Figure 1, when external ambient light 10 passes through the protective glass 15 and is incident on the interior of the panel. When between two adjacent organic light-emitting diodes 17, reflected light will be generated due to encountering the metal material of the thin film transistor layer 11 in the panel, which may cause interference to human eyes. Therefore, traditional OLED panels will be equipped with There is a polarizing layer 13 to eliminate the reflected light caused by the ambient light 10 incident on the metal material in the panel. However, the arrangement of the polarizing layer 13 prevents the thickness of the panel from being reduced, which is not conducive to thinning the product.

因此,遂有以在OLED面板中使用濾光層光阻(Color Filter)來取代偏振片層以避免面板厚度無法降低之缺陷,然而,使用光阻層來取代偏振層雖可以讓面板厚度降低,但也徹底阻絕了OLED面板的穿透特性,導致發展於屏幕內或屏幕下的光學指紋辨識裝置難以被採用。 Therefore, it is possible to use a color filter layer to replace the polarizer layer in the OLED panel to avoid the disadvantage that the thickness of the panel cannot be reduced. However, using a photoresist layer to replace the polarizing layer can reduce the thickness of the panel. However, it also completely blocks the penetration characteristics of the OLED panel, making it difficult to adopt optical fingerprint recognition devices developed within or under the screen.

因此,在習知光學指紋辨識裝置的設計上,實仍存在有諸多缺陷而有予以改善之必要。 Therefore, there are still many defects in the design of conventional optical fingerprint recognition devices, which need to be improved.

本發明之目的主要係在提供一種光學指紋辨識裝置,藉由只在像素定義層設置開孔,而不在光阻層的黑矩陣處開孔,可以確保入射面板的環境光依然可被消除且OLED面板的發光層所發出的訊號光打到手指並反射後仍可穿透過面板回到感光元件,而可以正確地進行指紋辨識。 The main purpose of the present invention is to provide an optical fingerprint recognition device. By only providing openings in the pixel definition layer without opening holes in the black matrix of the photoresist layer, it can ensure that the ambient light incident on the panel can still be eliminated and the OLED When the signal light emitted by the luminescent layer of the panel hits the finger and is reflected, it can still pass through the panel and return to the photosensitive element, so that fingerprint recognition can be performed correctly.

為達成前述之目的,本發明之光學指紋辨識裝置包括:一基板;一薄膜電晶體層,設置於該基板上;一發光層,設置於該薄膜電晶體層上,該發光層具有多數個紅色有機發光二極體、多數個綠色有機發光二極體及多數個藍色有機發光二極體,且該發光層配置為提供多數個像素,每一像素包含鄰近配置的一紅色有機發光二極體、一綠色有機發光二極體及一藍色有機發光二極體,兩相鄰的有機發光二極體之間設置有一不透光的像素定義層,且該像素定義層設置有一第一開孔;一濾光層,設置於該發光層上方,且包含多數個紅色濾光器、多數個綠色濾光器及多數個藍色濾光器,該多數個紅色濾光器分別對應於該多數個紅色有機發光二極體設置,該多數個綠色濾光器分別對應於該多數個綠色有機發光二極體設置,該多數個藍色濾光器分別對應於該多數個藍色有機發光二極體設置,且兩相鄰的濾光器之間設有對應該像素定義層的一黑矩陣;以及一保護玻璃,設置於該濾光層上。 In order to achieve the aforementioned objectives, the optical fingerprint identification device of the present invention includes: a substrate; a thin film transistor layer disposed on the substrate; a luminescent layer disposed on the thin film transistor layer, the luminescent layer having a plurality of red Organic light-emitting diodes, a plurality of green organic light-emitting diodes and a plurality of blue organic light-emitting diodes, and the light-emitting layer is configured to provide a plurality of pixels, each pixel including a red organic light-emitting diode arranged adjacently , a green organic light-emitting diode and a blue organic light-emitting diode, an opaque pixel definition layer is provided between two adjacent organic light-emitting diodes, and the pixel definition layer is provided with a first opening ; A filter layer, disposed above the luminescent layer, and including a plurality of red filters, a plurality of green filters and a plurality of blue filters, the plurality of red filters respectively corresponding to the plurality of Red organic light-emitting diodes are arranged, the plurality of green filters respectively correspond to the plurality of green organic light-emitting diodes, and the plurality of blue filters respectively correspond to the plurality of blue organic light-emitting diodes. A black matrix corresponding to the pixel definition layer is disposed between two adjacent filters; and a protective glass is disposed on the filter layer.

以上概述與接下來的詳細說明皆為示範性質,是為了進一步說明本發明的申請專利範圍,而有關本發明的其他目的與優點,將在後續的說明與圖式加以闡述。 The above summary and the following detailed description are exemplary in nature and are intended to further illustrate the patentable scope of the present invention. Other objects and advantages of the present invention will be explained in the subsequent description and drawings.

10:環境光 10:Ambient light

11:薄膜電晶體層 11:Thin film transistor layer

13:偏振層 13:Polarizing layer

15:保護玻璃 15:Protective glass

17:有機發光二極體 17: Organic light emitting diode

20:光學指紋辨識裝置 20: Optical fingerprint recognition device

21:基板 21:Substrate

22:薄膜電晶體層 22:Thin film transistor layer

23:發光層 23: Luminous layer

231,231-R,231-G,231-B,2311,2312:有機發光二極體 231,231-R,231-G,231-B,2311,2312: organic light emitting diode

233:像素定義層 233: Pixel definition layer

235,2351,2352:開孔 235,2351,2352: opening

24:填平層 24:Filling layer

25:濾光層 25:Filter layer

251,251-R,251-G,251-B,2511,2512:濾光器 251,251-R,251-G,251-B,2511,2512: Optical filter

253:黑矩陣 253:Black Matrix

26:保護玻璃 26:Protective glass

29:手指 29:Finger

31:像素 31:pixel

40-A,40-B,40-C,40-D:環境光 40-A, 40-B, 40-C, 40-D: ambient light

51:光感應器 51:Light sensor

53:光感應單元 53:Light sensing unit

61,61-R,61-G,61-B:光阻 61,61-R,61-G,61-B: Photoresist

圖1顯示傳統有機發光二極體面板以偏振片層來消除環境光所引起的視覺上的干擾的示意圖。 Figure 1 shows a schematic diagram of a traditional organic light-emitting diode panel using a polarizer layer to eliminate visual interference caused by ambient light.

圖2顯示本發明的光學指紋辨識裝置的一實施例的示意圖。 FIG. 2 shows a schematic diagram of an embodiment of the optical fingerprint recognition device of the present invention.

圖3顯示本發明的光學指紋辨識裝置的配置示意圖。 Figure 3 shows a schematic configuration diagram of the optical fingerprint identification device of the present invention.

圖4顯示本發明的光學指紋辨識裝置吸收各種路徑的環境光的示意圖。 FIG. 4 shows a schematic diagram of the optical fingerprint recognition device of the present invention absorbing ambient light in various paths.

圖5A顯示以本發明所構成的屏下式光學指紋辨識裝置。 FIG. 5A shows an under-screen optical fingerprint recognition device composed of the present invention.

圖5B顯示以本發明所構成的屏內式光學指紋辨識裝置。 FIG. 5B shows an in-screen optical fingerprint recognition device composed of the present invention.

圖6A顯示於本發明之光學指紋辨識裝置的發光層的開孔中填入光阻的範例。 FIG. 6A shows an example of filling photoresist in the openings of the light-emitting layer of the optical fingerprint identification device of the present invention.

圖6B顯示於本發明之光學指紋辨識裝置提供假指紋判別之功能。 FIG. 6B shows that the optical fingerprint identification device of the present invention provides the function of identifying false fingerprints.

圖7顯示本發明的光學指紋辨識裝置的另一實施例的示意圖。 FIG. 7 shows a schematic diagram of another embodiment of the optical fingerprint recognition device of the present invention.

為了使本發明的目的、技術方案及優點更加清楚明白,以下結合附圖及實施例,對本發明進行進一步詳細說明。應當理解,此處所描述的具體實施例僅僅用以解釋本發明的實施方式,並不用於限定本發明。 In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the implementation of the present invention and are not intended to limit the present invention.

圖2顯示本發明的光學指紋辨識裝置的一實施例的示意圖,本實施例的光學指紋辨識裝置20為設置於一面板中,且包括一基板21、一薄膜電晶體(Thin Film Transistor,TFT)層22、一發光層23、 一填平層24,一濾光層25、及一保護玻璃26。其中,薄膜電晶體層22設置於基板21上;發光層23設置於薄膜電晶體層22上,發光層23具有多數個間隔設置的有機發光二極體231,兩相鄰有機發光二極體231之間具有一像素定義層(Pixel Define Layer,PDL)233,較佳可以是不透光的材料,且位於兩相鄰有機發光二極體231之間的像素定義層233具有至少一開孔235,開孔235的尺寸最小需大於2μm;填平層24設置於基板21上,且覆蓋發光層23及像素定義層233;濾光層25設置於填平層24上,濾光層25具有多個間隔設置的濾光器251,兩濾光器251之間充滿黑矩陣(Black Matrix,BM)253,多個濾光器251在位置上分別對應於發光層23的多個有機發光二極體231,且黑矩陣253在位置上亦對應於像素定義層235;保護玻璃26設置於濾光層25上,以供手指29接觸、按壓來進行指紋辨識。 FIG. 2 shows a schematic diagram of an embodiment of an optical fingerprint identification device of the present invention. The optical fingerprint identification device 20 of this embodiment is disposed in a panel and includes a substrate 21 and a thin film transistor (TFT). layer 22, a luminescent layer 23, A leveling layer 24 , a filter layer 25 , and a protective glass 26 . Among them, the thin film transistor layer 22 is disposed on the substrate 21; the luminescent layer 23 is disposed on the thin film transistor layer 22. The luminescent layer 23 has a plurality of organic light-emitting diodes 231 arranged at intervals, and two adjacent organic light-emitting diodes 231 There is a Pixel Define Layer (PDL) 233 between the two adjacent organic light-emitting diodes 231 , preferably made of an opaque material, and the pixel definition layer 233 between two adjacent organic light-emitting diodes 231 has at least one opening 235 , the minimum size of the opening 235 needs to be greater than 2 μm; the filling layer 24 is provided on the substrate 21 and covers the light-emitting layer 23 and the pixel definition layer 233; the filter layer 25 is provided on the filling layer 24, and the filter layer 25 has multiple There are two optical filters 251 arranged at intervals. The space between the two optical filters 251 is filled with a black matrix (Black Matrix, BM) 253. The positions of the multiple optical filters 251 respectively correspond to the multiple organic light-emitting diodes of the light-emitting layer 23. 231, and the position of the black matrix 253 also corresponds to the pixel definition layer 235; the protective glass 26 is provided on the filter layer 25 for contact and pressing by the finger 29 for fingerprint recognition.

於圖2之光學指紋辨識裝置的實施例中,發光層23為具有多數個紅色有機發光二極體231-R、多數個綠色有機發光二極體231-G及多數個藍色有機發光二極體231-B,請一併參照圖3所示光學指紋辨識裝置20的配置示意圖,發光層23配置為提供以例如矩陣形式排列的多數個像素31,每一像素31包含鄰近配置的一紅色有機發光二極體231-R、一綠色有機發光二極體231-G及一藍色有機發光二極體231-B,且如圖2所示,兩相鄰有機發光二極體231之間的像素定義層233具有一第一開孔2351。相應地,濾光層25為具有多數個紅色濾光器251-R、多數個綠色濾光器251-G及多數個藍色濾光器251-B,多數個紅色濾光器251-R在位置上分別對應多數個紅色有機發光二極體231-R,多數個綠色濾光器251-G在位置上分別對應多數個綠色有機發光二極體231-G,多數個藍色濾光器251-B在位置上分別對應該多數 個藍色有機發光二極體231-B,因此,分別對應兩相鄰的有機發光二極體231的兩相鄰的濾光器251之間為佈滿對應畫素定義層233的黑矩陣253,需注意的是,圖3中所繪示的有機發光二極體231、濾光器251及黑矩陣253的尺寸比例及關係僅是為清楚顯示光學指紋辨識裝置20的配置,並非實際的尺寸比例及關係。 In the embodiment of the optical fingerprint recognition device in Figure 2, the light-emitting layer 23 has a plurality of red organic light-emitting diodes 231-R, a plurality of green organic light-emitting diodes 231-G and a plurality of blue organic light-emitting diodes. Body 231-B, please also refer to the schematic configuration diagram of the optical fingerprint recognition device 20 shown in FIG. 3. The light-emitting layer 23 is configured to provide a plurality of pixels 31 arranged in, for example, a matrix form. Each pixel 31 includes a red organic layer adjacently arranged. The light-emitting diode 231-R, a green organic light-emitting diode 231-G and a blue organic light-emitting diode 231-B, and as shown in Figure 2, the gap between two adjacent organic light-emitting diodes 231 The pixel definition layer 233 has a first opening 2351. Correspondingly, the filter layer 25 has a plurality of red filters 251-R, a plurality of green filters 251-G and a plurality of blue filters 251-B. The plurality of red filters 251-R are The positions correspond to a plurality of red organic light-emitting diodes 231-R and a plurality of green filters 251-G respectively. The positions correspond to a plurality of green organic light-emitting diodes 231-G and a plurality of blue filters 251 respectively. -B corresponds to the majority in position There are two blue organic light-emitting diodes 231-B. Therefore, between the two adjacent filters 251 corresponding to the two adjacent organic light-emitting diodes 231 is a black matrix 253 filled with the corresponding pixel definition layer 233. , it should be noted that the size ratio and relationship of the organic light-emitting diode 231, the optical filter 251 and the black matrix 253 shown in Figure 3 are only to clearly show the configuration of the optical fingerprint recognition device 20, and are not the actual sizes. Proportions and relationships.

再請參照圖2所示,對於兩相鄰的第一有機發光二極體2311(例如,紅色有機發光二極體231-R)及第二有機發光二極體2312(例如,綠色有機發光二極體231-G)與對應的兩相鄰的第一濾光器2511(例如,紅色濾光器251-R)及第二濾光器2512(例如,綠色濾光器251-G),位於第一濾光器2511及第二濾光器2512之間的黑矩陣253與第一濾光器2511鄰接的邊緣是大致上對齊於第一有機發光二極體2311與對應的畫素定義層233鄰接的邊緣,且位於第一有機發光二極體2311(紅色有機發光二極體231-R)及第二有機發光二極體2312(綠色有機發光二極體231-G)之間的第一開孔2351的中心與第一有機發光二極體2311(紅色有機發光二極體231-R)的距離小於L/2,其中,L為第一有機發光二極體2311(紅色有機發光二極體231-R)與第二有機發光二極體2312(綠色有機發光二極體231-G)之間的距離,亦即,相較於第二有機發光二極體2312(綠色有機發光二極體231-G),第一開孔2351較為靠近第一有機發光二極體2311(紅色有機發光二極體231-R),同樣地,對於其他兩相鄰的有機發光二極體231,例如相鄰的綠色有機發光二極體231-G與藍色有機發光二極體231-B,其位置配置可參照前述說明得知,故不再贅述。 Please refer to FIG. 2 again, for two adjacent first organic light-emitting diodes 2311 (for example, red organic light-emitting diodes 231-R) and second organic light-emitting diodes 2312 (for example, green organic light-emitting diodes). The polar body 231-G) and the corresponding two adjacent first optical filters 2511 (for example, the red filter 251-R) and the second optical filter 2512 (for example, the green filter 251-G) are located at The edge of the black matrix 253 between the first filter 2511 and the second filter 2512 and adjacent to the first filter 2511 is substantially aligned with the first organic light emitting diode 2311 and the corresponding pixel definition layer 233 The adjacent edge and the first organic light-emitting diode 2311 (red organic light-emitting diode 231-R) and the second organic light-emitting diode 2312 (green organic light-emitting diode 231-G) The distance between the center of the opening 2351 and the first organic light-emitting diode 2311 (red organic light-emitting diode 231-R) is less than L/2, where L is the first organic light-emitting diode 2311 (red organic light-emitting diode 231-R). 231-R) and the second organic light-emitting diode 2312 (green organic light-emitting diode 231-G), that is, compared with the second organic light-emitting diode 2312 (green organic light-emitting diode 231-G) body 231-G), the first opening 2351 is relatively close to the first organic light-emitting diode 2311 (red organic light-emitting diode 231-R). Similarly, for the other two adjacent organic light-emitting diodes 231, for example The positions and configurations of the adjacent green organic light-emitting diodes 231-G and blue organic light-emitting diodes 231-B can be known by referring to the foregoing description, and therefore will not be described again.

以上述光學指紋辨識裝置的結構,由於黑矩陣253是佈滿兩相鄰的濾光器251之間而使得濾光層25不具有任何開孔,及黑矩 陣253與第一濾光器2511鄰接的邊緣是大致上對齊於對應的第一有機發光二極體2311與畫素定義層233鄰接的邊緣,且相較於綠色有機發光二極體231-G,第一開孔2351的位置較為接近紅色有機發光二極體231-R,相較於藍色有機發光二極體231-B),第一開孔2351的位置較為接近綠色有機發光二極體231-G,因此,各種路徑的環境光皆可被吸收,例如,如圖4所示,由面板外入射至濾光層25的黑矩陣253的環境光40-A將直接被黑矩陣253所吸收;對於由面板外入射經過濾光器251後穿透過畫素定義層233的開孔235打到薄膜電晶體層22上的金屬材質而反射的環境光40-B,基於入射角度等於反射角度的光線反射原理,此反射的環境光40-B可被未開孔區的不透光的畫素定義層233所吸收,或是被佈滿在兩相鄰的濾光器251之間的黑矩陣253所吸收,因而不會造成干擾;對於由面板外入射經過濾光器251後打到發光層23的有機發光二極體231底部的金屬材質而反射的環境光40-C,則此反射的環境光40-C可被佈滿在兩相鄰的濾光器251之間的黑矩陣253所吸收;對於由面板外以小角度方式入射且恰好穿過濾光器251與畫素定義層233的開孔235後入射到薄膜電晶體層22的金屬材質而反射的環境光40-D,由於入射角度小,因此由金屬材質反射的環境光40-B會以接近垂直的方向反射而出,而會被濾光層25的黑矩陣253所吸收,而可有效防止環境光所造成的干擾。 With the structure of the above optical fingerprint recognition device, since the black matrix 253 is filled between two adjacent filters 251, the filter layer 25 does not have any openings, and the black matrix The edge of the matrix 253 adjacent to the first filter 2511 is substantially aligned with the edge of the corresponding first organic light-emitting diode 2311 adjacent to the pixel definition layer 233, and compared with the green organic light-emitting diode 231-G. , the position of the first opening 2351 is closer to the red organic light-emitting diode 231-R, compared to the blue organic light-emitting diode 231-B), the position of the first opening 2351 is closer to the green organic light-emitting diode 231-G, therefore, ambient light in various paths can be absorbed. For example, as shown in Figure 4, ambient light 40-A incident from outside the panel to the black matrix 253 of the filter layer 25 will be directly absorbed by the black matrix 253. Absorption; for the ambient light 40-B that is incident from outside the panel and passes through the filter 251 and then passes through the opening 235 of the pixel definition layer 233 and hits the metal material on the thin film transistor layer 22 and is reflected, based on the incident angle being equal to the reflection angle According to the principle of light reflection, this reflected ambient light 40-B can be absorbed by the opaque pixel definition layer 233 in the non-hole area, or by the black matrix filled between two adjacent filters 251 253, so it will not cause interference; for the ambient light 40-C that is incident from outside the panel and passes through the filter 251 and then hits the metal material at the bottom of the organic light-emitting diode 231 of the light-emitting layer 23 and is reflected. The ambient light 40-C can be absorbed by the black matrix 253 filled between two adjacent filters 251; for light incident from outside the panel at a small angle and just passing through the filter 251 and the pixel definition layer 233 After opening the hole 235, the ambient light 40-D is incident on the metal material of the thin film transistor layer 22 and is reflected. Due to the small incident angle, the ambient light 40-B reflected by the metal material will be reflected in a nearly vertical direction, and It will be absorbed by the black matrix 253 of the filter layer 25 and can effectively prevent interference caused by ambient light.

此外,請再參照圖2所示的光學指紋辨識裝置的實施例,位於第一濾光器2511及第二濾光器2512之間的黑矩陣253與第二濾光器2512鄰接的邊緣亦大致上對齊於第二有機發光二極體2312與對應的畫素定義層233鄰接的邊緣。進一步,於圖2中,保護玻璃26、濾光層25與發光層23是配置為符合方程式:tanθ1=b1/a1,且θ1 為3°~7°,其中,a1為由第一有機發光二極體2311的中心通過第一濾光器2511至保護玻璃26的上表面的垂直距離,例如為510μm~515μm,b1為由第一有機發光體2311的中心到第一開孔2351的中心的距離,例如為30μm~60μm,以此結構,可優化防止環境光造成干擾的功效。 In addition, please refer to the embodiment of the optical fingerprint recognition device shown in FIG. 2 again. The edge of the black matrix 253 located between the first optical filter 2511 and the second optical filter 2512 adjacent to the second optical filter 2512 is also approximately The top is aligned with the edge of the second organic light emitting diode 2312 adjacent to the corresponding pixel definition layer 233 . Further, in Figure 2, the protective glass 26, the filter layer 25 and the light-emitting layer 23 are configured to comply with the equation: tanθ1=b1/a1, and θ1 is 3°~7°, where a1 is the vertical distance from the center of the first organic light-emitting diode 2311 through the first filter 2511 to the upper surface of the protective glass 26, for example, 510 μm~515 μm, and b1 is the distance from the first organic light-emitting diode 2311 to the upper surface of the protective glass 26. The distance from the center of an organic light-emitting body 2311 to the center of the first opening 2351 is, for example, 30 μm to 60 μm. This structure can optimize the effect of preventing interference caused by ambient light.

此外,如圖5A所示,本發明之光學指紋辨識裝置具有至少一光感應器51,且光感應器51為設置於基板21下方以構成一屏下式光學指紋辨識裝置,屏下式光學指紋辨識裝置所需要的訊號光源路徑如圖5A的虛線箭頭所示,發光層23的有機發光二極體231發出訊號光後,經過濾光器251入射到保護玻璃26上方的手指29表面產生反射或漫射,此被手指29反射或漫射的訊號光會再經過濾光器251,然後穿過像素定義層233的第一開孔2351,由於薄膜電晶體層22的金屬線路分布具有穿透空隙,可使得訊號光得以被穿透至下方的光感應器51,其中,像素定義層233上的開孔尺寸最小需大於2μm以避免嚴重繞射效應產生。再者,圖5B顯示本發明之光學指紋辨識裝置具有多數個光感應單元53,且多數個光感應單元53設置於薄膜電晶體層22中並分別位於發光層23像素定義層233中的多數個第一開孔2351下方以構成一屏內式光學指紋辨識裝置,屏內式光學指紋辨識裝置所需要的訊號光源路徑如圖5B虛線所示,發光層23的有機發光二極體231發出訊號光後,經過濾光器251入射到保護玻璃26上的手指29表面產生反射或漫射,此被手指29反射或漫射的訊號光會再經過濾光器251,然後穿過像素定義層233的第一開孔2351而入射至光感應單元53,其中,像素定義層233上的開孔尺寸最小需大於2μm以避免嚴重繞射效應產生。在上述實施例中,光感應單元可以是薄膜電晶體(TFT)、PIN二極體、CMOS或其它相似的電子元件。 In addition, as shown in FIG. 5A , the optical fingerprint identification device of the present invention has at least one light sensor 51 , and the light sensor 51 is disposed below the substrate 21 to form an under-screen optical fingerprint identification device. The under-screen optical fingerprint identification device The signal light source path required by the identification device is shown by the dotted arrow in Figure 5A. After the organic light-emitting diode 231 of the light-emitting layer 23 emits the signal light, it is incident on the surface of the finger 29 above the protective glass 26 through the filter 251, causing reflection or Diffusion, the signal light reflected or diffused by the finger 29 will then pass through the filter 251, and then pass through the first opening 2351 of the pixel definition layer 233, because the metal circuit distribution of the thin film transistor layer 22 has penetration gaps. , so that the signal light can be transmitted to the photo sensor 51 below, where the minimum opening size on the pixel definition layer 233 needs to be larger than 2 μm to avoid severe diffraction effects. Furthermore, FIG. 5B shows that the optical fingerprint identification device of the present invention has a plurality of light sensing units 53, and the plurality of light sensing units 53 are disposed in the thin film transistor layer 22 and are respectively located in a plurality of pixel definition layers 233 of the light emitting layer 23. An in-screen optical fingerprint identification device is formed below the first opening 2351. The signal light source path required by the in-screen optical fingerprint identification device is shown as a dotted line in Figure 5B. The organic light-emitting diode 231 of the light-emitting layer 23 emits signal light. Afterwards, the surface of the finger 29 incident on the protective glass 26 through the filter 251 is reflected or diffused. The signal light reflected or diffused by the finger 29 will pass through the filter 251 and then pass through the pixel definition layer 233 The first opening 2351 is incident on the light sensing unit 53, where the minimum opening size on the pixel definition layer 233 needs to be greater than 2 μm to avoid severe diffraction effects. In the above embodiments, the light sensing unit may be a thin film transistor (TFT), PIN diode, CMOS or other similar electronic components.

再者,如圖6A所示,於本發明之光學指紋辨識裝置20的發光層23中,相鄰的第一有機發光二極體2311(紅色有機發光二極體231-R)與第二有機發光二極體2312(綠色有機發光二極體231-G)之間的像素定義層233中的第一開孔2351填入與該第一濾光器2511具有相同波段的光阻61(亦即,紅色光阻61-R),因此,更可以有效阻絕來自於鄰近其他有機發光二極體(例如綠色有機發光二極體231-G)產生的串擾雜訊;同樣地,對於其他兩相鄰的有機發光二極體231,例如相鄰的綠色有機發光二極體231-G與藍色有機發光二極體231-B,其間的像素定義層233中的第一開孔2351係填入與第二濾光器2511具有相同波段的光阻61(亦即,綠色光阻61-G),以阻絕來自於鄰近的藍色有機發光二極體231-B產生的串擾雜訊。 Furthermore, as shown in FIG. 6A, in the light-emitting layer 23 of the optical fingerprint recognition device 20 of the present invention, the adjacent first organic light-emitting diode 2311 (red organic light-emitting diode 231-R) and the second organic light-emitting diode 231-R are adjacent to each other. The first opening 2351 in the pixel definition layer 233 between the light-emitting diodes 2312 (green organic light-emitting diode 231-G) is filled with the photoresist 61 having the same wavelength band as the first filter 2511 (that is, , the red photoresist 61-R), therefore, can effectively block the crosstalk noise generated from other adjacent organic light-emitting diodes (such as the green organic light-emitting diode 231-G); similarly, for the other two adjacent organic light-emitting diodes, The organic light-emitting diode 231, such as the adjacent green organic light-emitting diode 231-G and the blue organic light-emitting diode 231-B, the first opening 2351 in the pixel definition layer 233 between them is filled with The second optical filter 2511 has a photoresist 61 of the same wavelength band (ie, a green photoresist 61 -G) to block crosstalk noise generated from the adjacent blue organic light emitting diode 231 -B.

圖6B說明將圖6A的結構應用於屏內式光學指紋辨識裝置以提供假指紋判別之功能,如圖所示,以前述在開孔235中填入光阻61的配置,因為假指紋與真指紋的顏色不同,而且真指紋還有表皮與真皮結構,使得假指紋在填入藍色光阻、綠色光阻、紅色光阻的開孔235所對應的光感應單元53所感測的訊號強度比例與真指紋的訊號強度比例會有所不同,因此,藉由填入藍色光阻、綠色光阻、紅色光阻的開孔235所對應的光感應單元53所感測的訊號強度比例,即可判定出所感測之指紋為真指紋或假指紋。例如,當假指紋較為偏紅時,則填入紅色光阻的開孔235所對應的光感應單元53所感測的訊號強度會較強,而填入其它顏色光阻的開孔235所對應的光感應單元53所感測的訊號強度會較小,據此而可判定出假指紋。 6B illustrates the application of the structure of FIG. 6A to an in-screen optical fingerprint identification device to provide the function of identifying fake fingerprints. As shown in the figure, the photoresist 61 is filled in the opening 235 in the above configuration, because the fake fingerprint is different from the real fingerprint. The colors of fingerprints are different, and real fingerprints also have epidermal and dermal structures, so that the signal intensity sensed by the light sensing unit 53 corresponding to the opening 235 of the blue photoresist, green photoresist, and red photoresist filled in the fake fingerprint is proportional to The signal intensity ratio of real fingerprints will be different. Therefore, by filling in the blue photoresist, green photoresist, and red photoresist, the signal intensity ratio sensed by the light sensing unit 53 corresponding to the opening 235 can be determined. The sensed fingerprint is a real fingerprint or a fake fingerprint. For example, when the fake fingerprint is redder, the signal intensity sensed by the light sensing unit 53 corresponding to the opening 235 filled with red photoresist will be stronger, and the signal intensity sensed by the light sensing unit 53 corresponding to the opening 235 filled with other color photoresist will be The signal intensity sensed by the light sensing unit 53 will be smaller, based on which the fake fingerprint can be determined.

圖7顯示本發明的光學指紋辨識裝置的另一實施例的示意圖,本實施例的光學指紋辨識裝置相似於前一實施例,不同之處在於, 除設置有第一開孔2351外,發光層23的兩相鄰的第一有機發光二極體2311(紅色有機發光二極體231-R)及第二有機發光二極體2312(綠色有機發光二極體231-G)之間的像素定義層233更設置有一第二開孔2352,第二開孔2352的中心與第二有機發光二極體2312(綠色有機發光二極體231-G)的距離小於L/2,其中,L為第一有機發光二極體2311(紅色有機發光二極體231-R)與第二有機發光二極體2312(綠色有機發光二極體231-G)之間的距離,亦即,相較於第一有機發光二極體2311(紅色有機發光二極體231-R),第二開孔2352較為靠近第二有機發光二極體2312(綠色有機發光二極體231-G),且保護玻璃26、濾光層25與發光層23是配置為符合方程式:tanθ2=b2/a2,且θ2為3°~7°,其中,a2為第二有機發光二極體2312的中心通過第二濾光器2512至保護玻璃26的上表面的垂直距離,例如為510μm~515μm,b2為第二有機發光體2312的中心到第二開孔2352的中心的距離,例如為30μm~60μm。藉此,由於在單位面積上的開孔235的數量可提升2倍,故穿透率也相對提升2倍,同樣地,對於其他兩相鄰的有機發光二極體231,例如相鄰的綠色有機發光二極體231-G與藍色有機發光二極體231-B,其間的像素定義層233亦係設置有兩開孔2351及2352,且其位置配置可參照前述說明得知,故不再贅述。 Figure 7 shows a schematic diagram of another embodiment of the optical fingerprint identification device of the present invention. The optical fingerprint identification device of this embodiment is similar to the previous embodiment, except that, In addition to being provided with the first opening 2351, the two adjacent first organic light-emitting diodes 2311 (red organic light-emitting diode 231-R) and the second organic light-emitting diode 2312 (green organic light-emitting diode 2312) of the light-emitting layer 23 The pixel definition layer 233 between the diodes 231-G) is further provided with a second opening 2352. The center of the second opening 2352 is connected to the second organic light-emitting diode 2312 (green organic light-emitting diode 231-G). The distance is less than L/2, where L is the first organic light-emitting diode 2311 (red organic light-emitting diode 231-R) and the second organic light-emitting diode 2312 (green organic light-emitting diode 231-G) The distance between them, that is, compared to the first organic light-emitting diode 2311 (red organic light-emitting diode 231-R), the second opening 2352 is closer to the second organic light-emitting diode 2312 (green organic light-emitting diode 231-R). Diode 231-G), and the protective glass 26, the filter layer 25 and the luminescent layer 23 are configured to comply with the equation: tanθ2=b2/a2, and θ2 is 3°~7°, where a2 is the second organic light emitting The vertical distance from the center of the diode 2312 through the second filter 2512 to the upper surface of the protective glass 26 is, for example, 510 μm ~ 515 μm, and b2 is the distance from the center of the second organic light-emitting body 2312 to the center of the second opening 2352 , for example, 30μm~60μm. In this way, since the number of openings 235 per unit area can be increased by 2 times, the transmittance is also increased by 2 times. Similarly, for other two adjacent organic light-emitting diodes 231, such as adjacent green ones, The pixel definition layer 233 between the organic light-emitting diode 231-G and the blue organic light-emitting diode 231-B is also provided with two openings 2351 and 2352, and their position and configuration can be known by referring to the above description, so there is no need to Again.

同樣地,前述相鄰的第一有機發光二極體2311(紅色有機發光二極體231-R)與第二有機發光二極體2312(綠色有機發光二極體231-G)之間的像素定義層233中的第二開孔2352亦可填入與第二濾光器2512具有相同波段的光阻61(亦即,綠色光阻61-G),對於其他兩相鄰的有機發光二極體231,例如相鄰的綠色有機發光二極體231-G與藍色有機發光二極體231-B,其間的像素定義層233中的第二開孔 2352係填入與藍色濾光器251-B具有相同波段的光阻61(亦即,藍色光阻61-B),以達成有效阻絕來自於鄰近其他有機發光體產生的串擾雜訊及判別假指紋之功效,且於本實施例中,亦可將一光感應器設置於基板21下方以構成一屏下式光學指紋辨識裝置,或將多數個光感應單元設置於薄膜電晶體層22中並分別位於發光層23的多數個第一開孔2351及第二開孔2352下方以構成一屏內式光學指紋辨識裝置,其實施方式及所產生之功效相同於前一實施例,故不再贅述。 Similarly, the pixels between the aforementioned adjacent first organic light-emitting diode 2311 (red organic light-emitting diode 231-R) and second organic light-emitting diode 2312 (green organic light-emitting diode 231-G) The second opening 2352 in the definition layer 233 can also be filled with the photoresist 61 having the same wavelength band as the second filter 2512 (that is, the green photoresist 61-G). For the other two adjacent organic light-emitting diodes, body 231, such as the adjacent green organic light-emitting diode 231-G and the blue organic light-emitting diode 231-B, and the second opening in the pixel definition layer 233 between them 2352 is filled with photoresist 61 having the same wavelength band as blue filter 251-B (that is, blue photoresist 61-B) to effectively block crosstalk noise and discrimination generated from other nearby organic light-emitting objects. The effect of fake fingerprints, and in this embodiment, a photo sensor can also be disposed under the substrate 21 to form an under-screen optical fingerprint identification device, or a plurality of photo sensing units can be disposed in the thin film transistor layer 22 And are respectively located under the plurality of first openings 2351 and the second openings 2352 of the light-emitting layer 23 to form an in-screen optical fingerprint recognition device. The implementation method and the effect produced are the same as the previous embodiment, so no further Repeat.

由以上之說明可知,本發明由於只需在像素定義層做開孔而不需在光阻層的黑矩陣處開孔,因此可以保持黑矩陣之遮蔽環境光作用,並同時提升面板穿透率,且以像素定義層的開孔搭配濾光器的位置設計,可讓訊號光線呈現斜向入射並呈現準直效果,有效提升指紋對比度,此外,藉由在像素定義層的開孔中填入光阻的設計,使得每個光感應單元或光感應器的特定位置都只會接收到固定波段的訊號,更可實現真假指紋判斷之功能。 From the above description, it can be seen that the present invention only needs to make openings in the pixel definition layer instead of opening holes in the black matrix of the photoresist layer, so it can maintain the function of the black matrix in blocking ambient light and at the same time improve the panel transmittance. , and the position design of the openings in the pixel definition layer and the position of the filter can allow the signal light to be incident obliquely and exhibit a collimation effect, effectively improving the fingerprint contrast. In addition, by filling in the openings in the pixel definition layer The design of the photoresist allows each light sensing unit or specific position of the light sensor to only receive signals of a fixed waveband, and can also realize the function of judging true and false fingerprints.

上述實施例僅係為了方便說明而舉例而已,本發明所主張之權利範圍自應以申請專利範圍所述為準,而非僅限於上述實施例。 The above-mentioned embodiments are only examples for convenience of explanation. The scope of rights claimed by the present invention shall be subject to the scope of the patent application and shall not be limited to the above-mentioned embodiments.

20:光學指紋辨識裝置 20: Optical fingerprint recognition device

21:基板 21:Substrate

22:薄膜電晶體層 22:Thin film transistor layer

23:發光層 23: Luminous layer

231,231-R,231-G,231-B,2311,2312:有機發光二極體 231,231-R,231-G,231-B,2311,2312: organic light emitting diode

233:像素定義層 233: Pixel definition layer

235,2351:開孔 235,2351: opening

24:填平層 24:Filling layer

25:濾光層 25:Filter layer

251,251-R,251-G,251-B,2511,2512:濾光器 251,251-R,251-G,251-B,2511,2512: Optical filter

253:黑矩陣 253:Black Matrix

26:保護玻璃 26:Protective glass

29:手指 29:Finger

Claims (13)

一種光學指紋辨識裝置,包含:一基板;一薄膜電晶體層,設置於該基板上;一發光層,設置於該薄膜電晶體層上,該發光層具有多數個紅色有機發光二極體、多數個綠色有機發光二極體及多數個藍色有機發光二極體,且該發光層配置為提供多數個像素,每一像素包含鄰近配置的一紅色有機發光二極體、一綠色有機發光二極體及一藍色有機發光二極體,兩相鄰的有機發光二極體之間設置有一像素定義層,且該像素定義層設置有一第一開孔;一濾光層,設置於該發光層上方,且包含多數個紅色濾光器、多數個綠色濾光器及多數個藍色濾光器,該多數個紅色濾光器分別對應於該多數個紅色有機發光二極體設置,該多數個綠色濾光器分別對應於該多數個綠色有機發光二極體設置,該多數個藍色濾光器分別對應於該多數個藍色有機發光二極體設置,且兩相鄰的濾光器之間設有對應該像素定義層的一黑矩陣;一光感應裝置,設置於該發光層下方以用於辨識指紋;以及一保護玻璃,設置於該濾光層上。 An optical fingerprint identification device, including: a substrate; a thin film transistor layer disposed on the substrate; a luminescent layer disposed on the thin film transistor layer, the luminescent layer having a plurality of red organic light-emitting diodes, a plurality of A green organic light-emitting diode and a plurality of blue organic light-emitting diodes, and the light-emitting layer is configured to provide a plurality of pixels. Each pixel includes a red organic light-emitting diode and a green organic light-emitting diode that are adjacently arranged. body and a blue organic light-emitting diode, a pixel definition layer is provided between two adjacent organic light-emitting diodes, and the pixel definition layer is provided with a first opening; a filter layer is provided on the light-emitting layer above, and includes a plurality of red filters, a plurality of green filters and a plurality of blue filters. The plurality of red filters respectively correspond to the plurality of red organic light-emitting diodes. The plurality of The green filters are respectively arranged corresponding to the plurality of green organic light-emitting diodes, the plurality of blue filters are respectively arranged corresponding to the plurality of blue organic light-emitting diodes, and the distance between the two adjacent filters is There is a black matrix corresponding to the pixel definition layer; a light sensing device disposed under the luminescent layer for fingerprint recognition; and a protective glass disposed on the filter layer. 如請求項1所述之光學指紋辨識裝置,其中,位於兩相鄰的第一有機發光二極體及第二有機發光二極體之間的該第一開孔的中心與該第一有機發光二極體的距離小於L/2,L為該第一有機發光二極體與該第二有機發光二極體之間的距離。 The optical fingerprint identification device according to claim 1, wherein the center of the first opening between two adjacent first organic light-emitting diodes and the second organic light-emitting diode is in contact with the first organic light-emitting diode. The distance between the diodes is less than L/2, and L is the distance between the first organic light-emitting diode and the second organic light-emitting diode. 如請求項2所述之光學指紋辨識裝置,其中,位於對應該第一有機發光二極體及該第二有機發光二極體的兩相鄰的第一濾光器及第二濾光器之間的該黑矩陣與該第二濾光器鄰接的邊緣對齊於該第二有機發光二極體與對應的像素定義層鄰接的邊緣。 The optical fingerprint identification device according to claim 2, wherein the optical fingerprint recognition device is located between two adjacent first filters and second filters corresponding to the first organic light-emitting diode and the second organic light-emitting diode. The edge of the black matrix adjacent to the second filter is aligned with the edge of the second organic light emitting diode adjacent to the corresponding pixel definition layer. 如請求項2所述之光學指紋辨識裝置,其中,該保護玻璃、該濾光層與該發光層配置為符合方程式:tanθ1=b1/a1,且θ1為3°~7°,其中,a1為由該第一有機發光二極體的中心通過該第一濾光器至該保護玻璃的上表面的垂直距離,b1為由該第一有機發光體的中心到該第一開孔的中心的距離。 The optical fingerprint identification device according to claim 2, wherein the protective glass, the filter layer and the luminescent layer are configured to comply with the equation: tanθ1=b1/a1, and θ1 is 3°~7°, where a1 is The vertical distance from the center of the first organic light-emitting diode through the first filter to the upper surface of the protective glass, b1 is the distance from the center of the first organic light-emitting body to the center of the first opening . 如請求項2所述之光學指紋辨識裝置,其中,該第一開孔填入與該第一濾光器具有相同波段的光阻。 The optical fingerprint identification device according to claim 2, wherein the first opening is filled with a photoresist having the same wavelength band as the first optical filter. 如請求項2所述之光學指紋辨識裝置,其中,該光感應裝置包含:至少一光感應器,設置於該基板下方。 The optical fingerprint identification device as claimed in claim 2, wherein the light sensing device includes: at least one light sensor disposed below the substrate. 如請求項2所述之光學指紋辨識裝置,其中,該光感應裝置包含:多數個光感應單元,設置於該薄膜電晶體層中,且分別對應該第一開孔下方設置。 The optical fingerprint identification device as claimed in claim 2, wherein the light sensing device includes: a plurality of light sensing units, which are disposed in the thin film transistor layer and respectively corresponding to the bottom of the first opening. 如請求項3所述之光學指紋辨識裝置,其中,於該發光層中,該第一有機發光二極體及該第二有機發光二極體之間的該像素定義層更設置有一第二開孔,該第二開孔的中心與該第二有機發光二極體的距離小於L/2。 The optical fingerprint recognition device as claimed in claim 3, wherein in the light-emitting layer, the pixel definition layer between the first organic light-emitting diode and the second organic light-emitting diode is further provided with a second opening. hole, and the distance between the center of the second opening and the second organic light-emitting diode is less than L/2. 如請求項8所述之光學指紋辨識裝置,其中,該保護玻璃、該濾光層與該發光層配置為符合方程式:tanθ2=b2/a2,且θ2為3°~7°,其中,a2為由該第二有機發光二極體的中心通過該第二濾光 器至該保護玻璃的上表面的垂直距離,b為由該第二有機發光體的中心到該第二開孔的中心的距離。 The optical fingerprint identification device according to claim 8, wherein the protective glass, the filter layer and the luminescent layer are configured to comply with the equation: tanθ2=b2/a2, and θ2 is 3°~7°, where a2 is Passing through the second filter from the center of the second organic light emitting diode b is the distance from the center of the second organic light-emitting body to the center of the second opening. 如請求項8所述之光學指紋辨識裝置,其中,該第二開孔填入與該第二濾光器具有相同波段的光阻。 The optical fingerprint identification device as claimed in claim 8, wherein the second opening is filled with a photoresist having the same wavelength band as the second optical filter. 如請求項8所述之光學指紋辨識裝置,其更包含:至少一光感應器,設置於該基板下方。 The optical fingerprint identification device as claimed in claim 8, further comprising: at least one light sensor disposed below the substrate. 如請求項8所述之光學指紋辨識裝置,其更包含:多數個光感應單元,設置於該薄膜電晶體層中,且分別對應該多數個第一開孔及該多數個第二開孔下方設置。 The optical fingerprint identification device as claimed in claim 8, further comprising: a plurality of light sensing units disposed in the thin film transistor layer and respectively corresponding to the plurality of first openings and the plurality of second openings. settings. 如請求項1所述之光學指紋辨識裝置,其更包含:一填平層,位於該發光層與該濾光層之間,且覆蓋該發光層及該像素定義層。 The optical fingerprint identification device as claimed in claim 1, further comprising: a filling layer located between the luminescent layer and the filter layer and covering the luminescent layer and the pixel definition layer.
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