TW202301186A - Under-screen identification display apparatus - Google Patents
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本發明是有關於一種顯示裝置,且特別是有關於一種具有指紋辨識功能的屏下辨識的顯示裝置。The present invention relates to a display device, and in particular to an under-screen recognition display device with a fingerprint recognition function.
為了提高顯示器的屏占比以實現窄邊框的設計,屏下指紋辨識技術已成為趨勢。簡單來說,屏下指紋辨識技術乃是將指紋辨識模組配置在電子裝置的顯示面板的下方。在電子裝置偵測到使用者接觸顯示螢幕後,電子裝置會控制顯示面板發光以照亮使用者的手指表面。光線可經由使用者的手指(漫)反射進入顯示面板下方的指紋辨識模組,並由指紋辨識模組將反射光線轉換為數位影像信號,即可得到使用者指紋影像。In order to increase the screen-to-body ratio of the display to achieve a narrow bezel design, the fingerprint recognition technology under the screen has become a trend. To put it simply, the under-screen fingerprint recognition technology is to configure the fingerprint recognition module under the display panel of the electronic device. After the electronic device detects that the user touches the display screen, the electronic device controls the display panel to emit light to illuminate the surface of the user's finger. The light can be (diffusely) reflected by the user's finger and enter the fingerprint recognition module under the display panel, and the fingerprint recognition module converts the reflected light into a digital image signal to obtain the fingerprint image of the user.
目前具有指紋辨識功能的顯示裝置大都是將指紋辨識模組整合至背光模組或額外的遮光面板中。然而,此類作法會增加顯示裝置的整體厚度,且指紋辨識模組的可視性會降低顯示裝置的顯示品質。也因此,會降低指紋辨識模組於顯示區內的設置彈性。Most of the current display devices with fingerprint recognition function integrate the fingerprint recognition module into the backlight module or an additional shading panel. However, such an approach will increase the overall thickness of the display device, and the visibility of the fingerprint recognition module will reduce the display quality of the display device. Therefore, the flexibility of disposing the fingerprint identification module in the display area will be reduced.
本發明提供一種具有指紋辨識功能的屏下辨識的顯示裝置,其整體厚度較薄,且顯示品質較佳。The invention provides an under-screen identification display device with a fingerprint identification function, the overall thickness of which is thinner, and the display quality is better.
本發明的屏下辨識的顯示裝置,適於在外部光線的照射下產生影像光線。屏下辨識的顯示裝置包括第一基板、第二基板、液晶層、反射層、光子晶體層和指紋辨識模組。第二基板與第一基板相對設置。液晶層設置在第一基板與第二基板之間。反射層設置在第一基板與液晶層之間,且用以反射外部光線的一部分以產生影像光線。光子晶體層設置在第一基板與液晶層之間,且不重疊於反射層。指紋辨識模組設置在第一基板背離液晶層的一側,且重疊於光子晶體層。指紋辨識模組適於朝向光子晶體層發出照明光線。光子晶體層適於讓照明光線通過並且反射外部光線的另一部分。The display device for under-screen recognition of the present invention is suitable for generating image light under the irradiation of external light. The display device for identification under the screen includes a first substrate, a second substrate, a liquid crystal layer, a reflective layer, a photonic crystal layer and a fingerprint recognition module. The second substrate is opposite to the first substrate. The liquid crystal layer is disposed between the first substrate and the second substrate. The reflective layer is disposed between the first substrate and the liquid crystal layer, and is used for reflecting a part of external light to generate image light. The photonic crystal layer is arranged between the first substrate and the liquid crystal layer, and does not overlap the reflective layer. The fingerprint identification module is arranged on the side of the first substrate away from the liquid crystal layer, and overlaps with the photonic crystal layer. The fingerprint identification module is adapted to emit illuminating light towards the photonic crystal layer. The photonic crystal layer is adapted to let the illumination light pass through and reflect another part of the external light.
在本發明的一實施例中,上述的屏下辨識的顯示裝置更包括設置在第一基板上的主動元件層,且反射層與主動元件層電性連接。In an embodiment of the present invention, the above-mentioned display device for under-screen recognition further includes an active element layer disposed on the first substrate, and the reflective layer is electrically connected to the active element layer.
在本發明的一實施例中,上述的屏下辨識的顯示裝置更包括彩色濾光層。彩色濾光層重疊設置於反射層,且位於液晶層與反射層之間。光子晶體層不重疊於反射層和彩色濾光層。彩色濾光層和反射層在一疊置方向上的厚度等於光子晶體層在此疊置方向上的厚度。In an embodiment of the present invention, the above-mentioned display device for under-screen recognition further includes a color filter layer. The color filter layer is stacked on the reflective layer and located between the liquid crystal layer and the reflective layer. The photonic crystal layer does not overlap the reflective layer and the color filter layer. The thickness of the color filter layer and the reflective layer in a stacking direction is equal to the thickness of the photonic crystal layer in the stacking direction.
在本發明的一實施例中,上述的屏下辨識的顯示裝置的光子晶體層包括適於反射不同顏色光線的第一光子晶體圖案、第二光子晶體圖案和第三光子晶體圖案。In an embodiment of the present invention, the photonic crystal layer of the above-mentioned display device for under-screen recognition includes a first photonic crystal pattern, a second photonic crystal pattern and a third photonic crystal pattern suitable for reflecting light of different colors.
在本發明的一實施例中,上述的屏下辨識的顯示裝置的第一光子晶體圖案、第二光子晶體圖案和第三光子晶體圖案分別用以反射波長介於630奈米至750奈米的紅光、波長介於490奈米至570奈米的綠光和波長介於440奈米至470奈米的藍光。In an embodiment of the present invention, the first photonic crystal pattern, the second photonic crystal pattern and the third photonic crystal pattern of the above-mentioned under-screen display device are respectively used to reflect Red light, green light with a wavelength between 490nm and 570nm, and blue light with a wavelength between 440nm and 470nm.
在本發明的一實施例中,上述的屏下辨識的顯示裝置的第一光子晶體圖案、第二光子晶體圖案和第三光子晶體圖案於第一基板上的正投影互不重疊。In an embodiment of the present invention, the orthographic projections of the first photonic crystal pattern, the second photonic crystal pattern and the third photonic crystal pattern of the above-mentioned under-screen display device on the first substrate do not overlap each other.
在本發明的一實施例中,上述的屏下辨識的顯示裝置的第一光子晶體圖案、第二光子晶體圖案和第三光子晶體圖案於第一基板上的正投影相互重疊。In an embodiment of the present invention, the orthographic projections of the first photonic crystal pattern, the second photonic crystal pattern and the third photonic crystal pattern of the above-mentioned under-screen display device on the first substrate overlap each other.
在本發明的一實施例中,上述的屏下辨識的顯示裝置更包括導光板和光源。導光板設置在第二基板背離液晶層的一側,且具有朝向反射層的出光面以及連接出光面的入光面。光源設置在導光板的入光面的一側。In an embodiment of the present invention, the above-mentioned display device for under-screen recognition further includes a light guide plate and a light source. The light guide plate is arranged on the side of the second substrate away from the liquid crystal layer, and has a light-emitting surface facing the reflection layer and a light-incoming surface connected to the light-emitting surface. The light source is arranged on one side of the light incident surface of the light guide plate.
在本發明的一實施例中,上述的屏下辨識的顯示裝置的反射層為另一光子晶體層。In an embodiment of the present invention, the reflective layer of the above-mentioned display device for under-screen recognition is another photonic crystal layer.
在本發明的一實施例中,上述的屏下辨識的顯示裝置的反射層與光子晶體層為一體。In an embodiment of the present invention, the reflective layer and the photonic crystal layer of the above-mentioned display device for under-screen recognition are integrated.
在本發明的一實施例中,上述的屏下辨識的顯示裝置更包括多個透光導電圖案,重疊設置於光子晶體層。反射層為多個反射電極,且這些透光導電圖案分別電性連接這些反射電極。In an embodiment of the present invention, the above-mentioned display device for under-screen recognition further includes a plurality of light-transmitting conductive patterns overlapped on the photonic crystal layer. The reflective layer is a plurality of reflective electrodes, and the transparent conductive patterns are respectively electrically connected to the reflective electrodes.
在本發明的一實施例中,上述的屏下辨識的顯示裝置的外部光線為可見光,而照明光線為紅外光。In an embodiment of the present invention, the external light of the above-mentioned display device for under-screen recognition is visible light, and the illuminating light is infrared light.
基於上述,在本發明一實施例的屏下辨識的顯示裝置中,第一基板背離液晶層的一側設有指紋辨識模組,且第一基板與液晶層之間設有光子晶體層。透過此光子晶體層與指紋辨識模組的重疊關係,可增加指紋辨識模組於顯示區內的設置彈性,更能避免屏下辨識的顯示裝置因設置指紋辨識模組而造成顯示品質的劣化。另一方面,由於本發明的屏下辨識的顯示裝置無須設置額外的遮光板即可有效降低指紋辨識模組的可視性,因此還可具有較為輕薄的外觀。Based on the above, in an under-screen identification display device according to an embodiment of the present invention, a fingerprint identification module is provided on the side of the first substrate facing away from the liquid crystal layer, and a photonic crystal layer is provided between the first substrate and the liquid crystal layer. Through the overlapping relationship between the photonic crystal layer and the fingerprint identification module, the flexibility of disposing the fingerprint identification module in the display area can be increased, and the display quality deterioration caused by the fingerprint identification module installed on the display device for under-screen identification can be avoided. On the other hand, since the display device for under-screen identification of the present invention can effectively reduce the visibility of the fingerprint identification module without installing an additional light-shielding plate, it can also have a relatively thin and light appearance.
有關本發明之前述及其他技術內容、特點與功效,在以下配合參考圖式之一較佳實施例的詳細說明中,將可清楚的呈現。以下實施例中所提到的方向用語,例如:上、下、左、右、前或後等,僅是參考附加圖式的方向。因此,使用的方向用語是用來說明並非用來限制本發明。The aforementioned and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of a preferred embodiment with reference to the drawings. The directional terms mentioned in the following embodiments, such as: up, down, left, right, front or back, etc., are only directions referring to the attached drawings. Accordingly, the directional terms are used to illustrate and not to limit the invention.
圖1是本發明的第一實施例的屏下辨識的顯示裝置的剖視示意圖。圖2是圖1的光子晶體層的俯視示意圖。圖3是本發明的另一實施例的光子晶體層的俯視示意圖。圖4是本發明的又一實施例的光子晶體層的俯視示意圖。FIG. 1 is a schematic cross-sectional view of a display device for under-screen recognition according to a first embodiment of the present invention. FIG. 2 is a schematic top view of the photonic crystal layer in FIG. 1 . FIG. 3 is a schematic top view of a photonic crystal layer according to another embodiment of the present invention. FIG. 4 is a schematic top view of a photonic crystal layer according to another embodiment of the present invention.
請參照圖1及圖2,屏下辨識的顯示裝置10包括第一基板101、第二基板102、主動元件層105、液晶層110和反射層120。第一基板101與第二基板102相對設置。液晶層110設置在第一基板101與第二基板102之間。反射層120設置在第一基板101上,並且位於第一基板101與液晶層110之間。主動元件層105設置在第一基板101上,且位於液晶層110與第一基板101之間。在本實施例中,反射層120例如是多個反射電極RE。這些反射電極RE電性連接第一基板101。第一基板101和第二基板102的板材可採用玻璃、石英、或高分子聚合物(例如聚碳酸酯、聚醯亞胺或聚對苯二甲酸乙酯)製作而成,但不以此為限。Referring to FIG. 1 and FIG. 2 , the
舉例來說,第一基板101上還可設有多條掃描線(未繪示)和多條數據線(未繪示),主動元件層105可具有多個開關元件(未繪示)。這些開關元件各自電性連接對應的一條掃描線與對應的一條數據線。反射層120的多個反射電極RE分別電性連接這些開關元件(即主動元件層105)。此處的開關元件例如是薄膜電晶體、或其他合適的主動元件。另一方面,屏下辨識的顯示裝置10還可包括分別設置在第二基板102的相對兩側表面上的共電極層(未繪示)和偏光片(未繪示),其中共電極層位於液晶層110和第二基板102之間,但不以此為限。For example, a plurality of scan lines (not shown) and a plurality of data lines (not shown) can also be provided on the
此共電極層與這些反射電極RE被致能時所產生的電場可驅使液晶層110的多個液晶分子(未繪示)轉動,以調變入射光線(例如外部光線EB)的偏振態(polarization)。在本實施例中,屏下辨識的顯示裝置10例如是反射式屏下辨識的顯示裝置,其適於在外部光線EB的照射下產生影像光線IMB。例如:屏下辨識的顯示裝置10可根據欲呈現的畫面影像透過這些掃描線、這些數據線和這些開關元件個別地控制這些反射電極RE的電位,使外部光線EB在通過液晶層110兩次以及這些反射電極RE的反射後形成具有不同偏振態的影像光線IMB。影像光線IMB在通過前述的偏光片後具有對應的光強度並於人眼的視網膜上形成影像畫面。The electric field generated when the common electrode layer and the reflective electrodes RE are activated can drive a plurality of liquid crystal molecules (not shown) in the
需說明的是,本發明並不侷限液晶層110的驅動模式,例如:液晶層110可採用電控雙折射型(Electrically Controlled Birefringence,ECB)液晶模式、光學補償彎曲型(Optically compensated birefringence,OCB)液晶模式、垂直配向型(Vertical Alignment,VA)液晶模式、邊緣場切換型(Fringe-Field Switching,FFS)液晶模式、共面切換型(In-Plane Switching,IPS)液晶模式、扭轉向列型(Twisted Nematic,TN)液晶模式或超扭轉向列型(Super-Twisted Nematic,STN)液晶模式。It should be noted that the present invention is not limited to the driving mode of the
由於屏下辨識的顯示裝置10的電極配置方式是取決於液晶層110所採用的驅動模式,因此本發明並不加以侷限。例如:在其他未示出的實施例中,第一基板101上的電極層與反射層120也可屬於不同的膜層。或者是,共電極層也可改設置在第一基板101上。Since the electrode configuration of the
為了讓屏下辨識的顯示裝置10具有指紋辨識的功能,屏下辨識的顯示裝置10更包括光子晶體層130和指紋辨識模組200。詳細而言,第一基板101具有朝向液晶層110的第一表面101a以及與第一表面101a相對的第二表面101b。光子晶體層130與指紋辨識模組200分別射置在第一基板101的第一表面101a和第二表面101b上。亦即,指紋辨識模組200設置在第一基板101背離液晶層110的一側,而光子晶體層130設置在第一基板101與液晶層110之間。In order to allow the
在本實施例中,指紋辨識模組200與光子晶體層130是設置在多個反射電極RE之間,並且沿著方向Z彼此重疊。舉例來說,指紋辨識模組200可具有多個辨識單元200U,且這些辨識單元200U與多個反射電極RE在垂直方向Z的至少一方向(例如方向X)上交替排列,但不以此為限。In this embodiment, the
指紋辨識單元200U適於朝向光子晶體層130發出照明光線IB。此照明光線IB在經由手指FG的指紋表面的(漫)反射後形成指紋影像光線IB’並傳遞回對應的指紋辨識單元200U。特別注意的是,設置在此照明光線IB的傳遞路徑上的光子晶體層130適於讓照明光線IB和指紋影像光線IB’通過,並且反射一部分的外部光線EB(例如外部光線EB1)。除了能確保指紋辨識的正常運行外,還能增加指紋辨識模組200在外部光線EB的照射下的隱匿性。在本實施例中,照明光線IB例如是紅外光(infrared light),而外部光線EB例如是可見光(visible light)。The
進一步而言,光子晶體層130可選擇性地包括多個光子晶體圖案,例如:第一光子晶體圖案131、第二光子晶體圖案132和第三光子晶體圖案133。這些光子晶體圖案適於反射不同顏色的光線。在本實施例中,任兩相鄰的顯示畫素區PA之間都設有第一光子晶體圖案131、第二光子晶體圖案132和第三光子晶體圖案133,且這些光子晶體圖案於第一基板101上的正投影互不重疊,但不以此為限。舉例來說,第一光子晶體圖案131、第二光子晶體圖案132和第三光子晶體圖案133可分別用於反射波長介於630奈米至750奈米的紅光、波長介於490奈米至570奈米的綠光以及波長介於440奈米至470奈米的藍光,但不以此為限。Further, the
由於這些光子晶體圖案在光線的傳遞方向上互不重疊,因此,部分的可見光仍可通過光子晶體層130。為了降低指紋辨識模組200的可視性,指模辨識模組200的周圍可設有可見光吸收層(未繪示),但不以此為限。在其他實施例中,光子晶體層130與指紋辨識模組200之間可設有吸收型濾光層,此吸收型濾光層具有吸收可見光並且讓紅外光通過的特性。Since the photonic crystal patterns do not overlap with each other in the light transmission direction, part of the visible light can still pass through the
特別一提的是,屏下辨識的顯示裝置10還可選擇性地包括多個透光導電圖案150,而這些透光導電圖案150在方向Z上重疊於光子晶體層130。透光導電圖案150的材料例如包括金屬氧化物,例如:銦錫氧化物、銦鋅氧化物、鋁錫氧化物、鋁鋅氧化物、或其它合適的氧化物、或者是上述至少兩者之堆疊層。In particular, the
在本實施例中,這些透光導電圖案150分別電性連接反射層120的多個反射電極RE。因此,液晶層110沿著方向Z重疊於光子晶體層130的部分也能被電場驅動。也就是說,經由光子晶體層130反射的外部光線EB1再一次地通過液晶層110後的偏振態可被調變,使得這些反射電極RE之間的區域也可在亮暗態之間切換來達到彩色顯示的效果。從另一觀點來說,彼此相鄰且電性連接的反射電極RE與透光導電圖案150可定義出屏下辨識的顯示裝置10的顯示畫素區PA。In this embodiment, the light-transmitting
需說明的是,本發明並不加以侷限透光導電圖案150的設置方式,例如:在其他實施例中,透光導電圖案150也可改設置在光子晶體層130與第一基板101之間,並且直接覆蓋相鄰的反射電極RE。It should be noted that the present invention does not limit the arrangement of the light-transmitting
在本實施例中,這些光子晶體圖案可具有多個柱狀結構,且這些柱狀結構分別沿著至少兩個方向以特定節距排列。在本實施例中,這些柱狀結構是分別沿著方向X和方向Y排列,且方向X實質上垂直於方向Y,但不以此為限。在其他實施例中,這些柱狀結構也可分別沿著三個彼此相交且共面的方向以特定節距排列,例如:蜂巢狀排列。在本實施例中,這些柱狀結構在第一基板101上的正投影輪廓可以是正方形,但不以此為限。在其他實施例中光子晶體圖案的柱狀結構在第一基板101上的正投影輪廓也可以是圓形或其他合適的形狀。In this embodiment, the photonic crystal patterns may have a plurality of columnar structures, and the columnar structures are respectively arranged at a specific pitch along at least two directions. In this embodiment, the columnar structures are respectively arranged along the direction X and the direction Y, and the direction X is substantially perpendicular to the direction Y, but not limited thereto. In other embodiments, the columnar structures can also be arranged at a specific pitch along three directions intersecting each other and coplanar, for example, in a honeycomb arrangement. In this embodiment, the orthographic profile of these columnar structures on the
舉例來說,第一光子晶體圖案131的多個柱狀結構131p各自具有寬度Wa,且分別沿著方向X和方向Y以節距Pa排列。第二光子晶體圖案132的多個柱狀結構132p各自具有寬度Wb,且分別沿著方向X和方向Y以節距Pb排列。第三光子晶體圖案133的多個柱狀結構133p各自具有寬度Wc,且分別沿著方向X和方向Y以節距Pc排列。特別注意的是,這些用於反射不同顏色光線的光子晶體圖案的柱狀結構寬度和排列節距都不相同。For example, each of the plurality of
在本實施例中,無論是依照柱狀結構的寬度大小或是排列節距大小進行排序,第一光子晶體圖案131的寬度Wa和排列節距Pa都是最大的,第二光子晶體圖案132的寬度Wb和排列節距Pb次之,而第三光子晶體圖案133的寬度Wc和排列節距Pc都是最小的。此處的光子晶體圖案的柱狀結構材質包含矽(silicon),例如:單晶(single-crystalline)矽或多晶(polycrystalline)矽。In this embodiment, regardless of whether it is sorted according to the width of the columnar structure or the size of the arrangement pitch, the width Wa and the arrangement pitch Pa of the first
透過上述光子晶體層130的光學特性以及與指紋辨識模組200的重疊關係,除了可增加指紋辨識模組200於屏下辨識的顯示裝置10的顯示區內的設置彈性,還能避免屏下辨識的顯示裝置10因設置指紋辨識模組200而造成顯示品質的劣化。Through the optical properties of the above-mentioned
需說明的是,本發明並不加以侷限光子晶體層的週期性結構的構型及製作材料。在其他實施例中,光子晶體層130A的多個光子晶體圖案(例如:第一光子晶體圖案131A、第二光子晶體圖案132A和第三光子晶體圖案133A)的週期性結構也可以是多個孔洞(如圖3所示的孔洞131h、孔洞132h和孔洞133h),且其使用的材料例如是金屬材料、或其他合適的介電材料。另一方面,本發明也不加以侷限多個光子晶體圖案的排列方式,例如:在其他實施例中,為了讓紅光的反射效果大於綠光和藍光的反射效果,任兩相鄰的顯示畫素區PA之間可設有光子晶體層130B的兩個第一光子晶體圖案131B、一個第二光子晶體圖案132B和一個第三光子晶體圖案133B(如圖4所示)。It should be noted that the present invention is not limited to the configuration and manufacturing material of the periodic structure of the photonic crystal layer. In other embodiments, the periodic structure of multiple photonic crystal patterns (for example: the first
在本實施例中,屏下辨識的顯示裝置10還可選擇性地包括設置在液晶層110與反射層120之間的彩色濾光層140。此彩色濾光層140與反射層120重疊設置。特別注意的是,光子晶體層130沿著彩色濾光層140與反射層120的疊置方向(例如方向Z)不重疊於彩色濾光層140與反射層120,且彩色濾光層140和反射層120在疊置方向上的厚度T1實質上等於光子晶體層130在疊置方向上的厚度T2。據此,以確保液晶層110的膜厚均勻性,避免顯示品質因光子晶體層130的設置而劣化。In this embodiment, the
外部光線EB的另一部分(例如外部光線EB2)在通過彩色濾光層140形成不同顏色的光線,進而達到彩色顯示的效果。舉例來說,彩色濾光層140可包括多個紅色濾光圖案、多個綠色濾光圖案和多個藍色濾光圖案,且這些濾光圖案沿著方向Z分別重疊於反射層120的多個反射電極RE。外部光線EB2在通過這些濾光圖案後可分別形成紅光、綠光與藍光。然而,本發明不限於此。在其他實施例中,屏下辨識的顯示裝置也可不設有彩色濾光層140。Another part of the external light EB (for example, the external light EB2 ) passes through the
以下將列舉另一些實施例以詳細說明本揭露,其中相同的構件將標示相同的符號,並且省略相同技術內容的說明,省略部分請參考前述實施例,以下不再贅述。Some other embodiments will be listed below to describe the present disclosure in detail, wherein the same components will be marked with the same symbols, and the description of the same technical content will be omitted.
圖5是本發明的第二實施例的屏下辨識的顯示裝置的剖視示意圖。請參照圖5,本實施例的屏下辨識的顯示裝置10A與圖1的屏下辨識的顯示裝置10的差異在於:光子晶體層的光子晶體圖案的排列方式不同。在本實施例中,光子晶體層130C的第一光子晶體圖案131C、第二光子晶體圖案132C和第三光子晶體圖案133C例如是沿著第一基板101的第一表面101a的法線方向(例如方向Z)堆疊設置。亦即,這些光子晶體圖案於第一基板101上的正投影相互重疊。據此,可增加這些光子晶體圖案對不同顏色光線的反射面積。FIG. 5 is a schematic cross-sectional view of a display device for under-screen recognition according to a second embodiment of the present invention. Please refer to FIG. 5 , the difference between the under-screen
由於本實施例的第一光子晶體圖案131C、第二光子晶體圖案132C和第三光子晶體圖案133C相似於圖2實施例的第一光子晶體圖案131、第二光子晶體圖案132和第三光子晶體圖案133。因此,詳細的說明請參見前述實施例的相關段落,於此便不再贅述。Since the first
在本實施例中,外部光線EB1例如是由多種不同顏色光線所組成,例如:第一顏色光線EB1a(例如紅光)、第二顏色光線EB1b(例如綠光)和第三顏色光線EB1c(例如藍光)。當外部光線EB1傳遞至第一光子晶體圖案131C和液晶層110的交界面時,第一顏色光線EB1a會被反射。當外部光線EB1傳遞至第一光子晶體圖案131C和第二光子晶體圖案132C的交界面時,第二顏色光線EB1b會被反射。依此類推,當外部光線EB1傳遞至第二光子晶體圖案132C和第三光子晶體圖案133C的交界面時,第三顏色光線EB1c會被反射。In this embodiment, the external light EB1 is, for example, composed of a variety of different color light rays, for example: the first color light EB1a (such as red light), the second color light EB1b (such as green light) and the third color light EB1c (such as Blu-ray). When the external light EB1 is transmitted to the interface between the first
也就是說,外部光線EB1並無法通過光子晶體層130C,進而有效降低指紋辨識模組200的可視性。從另一觀點來說,由於屏下辨識的顯示裝置10A無須設置額外的遮光板即可有效降低指紋辨識模組200的可視性,因此還可具有較為輕薄的外觀。That is to say, the external light EB1 cannot pass through the
圖6是本發明的第三實施例的屏下辨識的顯示裝置的剖視示意圖。請參照圖6,本實施例的屏下辨識的顯示裝置20與圖1的屏下辨識的顯示裝置10的差異在於:屏下辨識的顯示裝置20還可選擇性地包括前光模組。舉例而言,前光模組包括導光板180和光源190。導光板180設置在第二基板102背離液晶層110的一側,且具有朝向反射層120的出光面180e以及連接出光面180e的入光面180i。光源190設置在導光板180的入光面180i的一側。FIG. 6 is a schematic cross-sectional view of a display device for under-screen recognition according to a third embodiment of the present invention. Please refer to FIG. 6 , the difference between the under-
在本實施例中,光源190用於提供照明光線FIB。此照明光線FIB經由導光板180內部的橫向傳遞後朝反射層120或光子晶體層130的方向自導光板180出射。透過此前光模組的設置,即使是在夜晚或較昏暗的使用環境下,屏下辨識的顯示裝置20也能具有良好的顯示品質。In this embodiment, the
圖7是本發明的第四實施例的屏下辨識的顯示裝置的剖視示意圖。請參照圖7,本實施例的屏下辨識的顯示裝置30與圖1的屏下辨識的顯示裝置10的差異在於:光子晶體層和指紋辨識模組的構型不同。在本實施例中,屏下辨識的顯示裝置30的光子晶體層130D為整面性延伸於液晶層110和第一基板101之間。也就是說,圖1的反射層120和彩色濾光層140的組合也可以由另一光子晶體層來取代,且此另一光子晶體層與圖1的光子晶體層130為一體,便形成本實施例的光子晶體層130D。7 is a schematic cross-sectional view of a display device for under-screen recognition according to a fourth embodiment of the present invention. Please refer to FIG. 7 , the difference between the
相應地,本實施例的指紋辨識模組200A也可整面性地分布於第一基板101的第二表面101b上。據此,可增加屏下辨識的顯示裝置30在指紋辨識時的操作彈性。例如:使用者可在顯示屏幕上的任意位置進行指紋辨識。由於本實施例的光子晶體層130D的組成及其配置方式相似於圖2的光子晶體層130、圖3的光子晶體層130A、圖4的光子晶體層130B或圖5的光子晶體層130C,因此,詳細的說明請參見前述實施例的相關段落,於此便不再贅述。Correspondingly, the
另一方面,不同於圖1的屏下辨識的顯示裝置10,本實施例的多個透光導電圖案150A可定義出屏下辨識的顯示裝置30的多個顯示畫素區PA’。On the other hand, different from the under-
綜上所述,在本發明一實施例的屏下辨識的顯示裝置中,第一基板背離液晶層的一側設有指紋辨識模組,且第一基板與液晶層之間設有光子晶體層。透過此光子晶體層與指紋辨識模組的重疊關係,可增加指紋辨識模組於顯示區內的設置彈性,更能避免屏下辨識的顯示裝置因設置指紋辨識模組而造成顯示品質的劣化。另一方面,由於本發明的屏下辨識的顯示裝置無須設置額外的遮光板即可有效降低指紋辨識模組的可視性,因此還可具有較為輕薄的外觀。To sum up, in the display device for under-screen identification according to an embodiment of the present invention, a fingerprint identification module is provided on the side of the first substrate facing away from the liquid crystal layer, and a photonic crystal layer is provided between the first substrate and the liquid crystal layer. . Through the overlapping relationship between the photonic crystal layer and the fingerprint identification module, the flexibility of disposing the fingerprint identification module in the display area can be increased, and the display quality deterioration caused by the fingerprint identification module installed on the display device for under-screen identification can be avoided. On the other hand, since the display device for under-screen identification of the present invention can effectively reduce the visibility of the fingerprint identification module without installing an additional light-shielding plate, it can also have a relatively thin and light appearance.
10、10A、20、30:屏下辨識的顯示裝置
101:第一基板
101a:第一表面
101b:第二表面
102:第二基板
105:主動元件層
110:液晶層
120:反射層
130、130A、130B、130C、130D:光子晶體層
131、132、133、131A、132A、133A、131B、132B、133B、131C、132C、133C:光子晶體圖案
131h、132h、133h:孔洞
131p、132p、133p:柱狀結構
140:彩色濾光層
150、150A:透光導電圖案
180:導光板
180e:出光面
180i:入光面
190:光源
200、200A:指紋辨識模組
200U:指紋辨識單元
Da、Db、Dc:孔徑
EB、EB1、EB2:外部光線
EB1a、EB1b、EB1c:顏色光線
FG:手指
IB、FIB:照明光線
IB’:指紋影像光線
IMB:影像光線
PA、PA’:顯示畫素區
Pa、Pb、Pc:節距
RE:反射電極
T1、T2:厚度
X、Y、Z:方向
10, 10A, 20, 30: Display devices for under-screen identification
101: The
圖1是本發明的第一實施例的屏下辨識的顯示裝置的剖視示意圖。 圖2是圖1的光子晶體層的俯視示意圖。 圖3是本發明的另一實施例的光子晶體層的俯視示意圖。 圖4是本發明的又一實施例的光子晶體層的俯視示意圖。 圖5是本發明的第二實施例的屏下辨識的顯示裝置的剖視示意圖。 圖6是本發明的第三實施例的屏下辨識的顯示裝置的剖視示意圖。 圖7是本發明的第四實施例的屏下辨識的顯示裝置的剖視示意圖。 FIG. 1 is a schematic cross-sectional view of a display device for under-screen recognition according to a first embodiment of the present invention. FIG. 2 is a schematic top view of the photonic crystal layer in FIG. 1 . FIG. 3 is a schematic top view of a photonic crystal layer according to another embodiment of the present invention. FIG. 4 is a schematic top view of a photonic crystal layer according to another embodiment of the present invention. FIG. 5 is a schematic cross-sectional view of a display device for under-screen recognition according to a second embodiment of the present invention. FIG. 6 is a schematic cross-sectional view of a display device for under-screen recognition according to a third embodiment of the present invention. 7 is a schematic cross-sectional view of a display device for under-screen recognition according to a fourth embodiment of the present invention.
10:屏下辨識的顯示裝置 10: Display device for under-screen identification
101:第一基板 101: The first substrate
101a:第一表面 101a: first surface
101b:第二表面 101b: second surface
102:第二基板 102: Second substrate
105:主動元件層 105: Active component layer
110:液晶層 110: liquid crystal layer
120:反射層 120: reflective layer
130:光子晶體層 130: photonic crystal layer
131、132、133:光子晶體圖案 131, 132, 133: photonic crystal pattern
140:彩色濾光層 140: Color filter layer
150:透光導電圖案 150: light-transmitting conductive pattern
200:指紋辨識模組 200:Fingerprint identification module
200U:指紋辨識單元 200U: fingerprint identification unit
EB、EB1、EB2:外部光線 EB, EB1, EB2: External light
FG:手指 FG: finger
IB:照明光線 IB: Illuminating light
IB’:指紋影像光線 IB': fingerprint image light
IMB:影像光線 IMB: image light
PA:顯示畫素區 PA: display pixel area
RE:反射電極 RE: reflective electrode
T1、T2:厚度 T1, T2: Thickness
X、Z:方向 X, Z: direction
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