Display device

Abstract

The invention provides a display device. The display device comprises a substrate, a shading layer, a color filter layer and a plurality of optical sensors. The shading layer is arranged on the substrate. The shading layer is provided with a first pixel opening area, a second pixel opening area and a third pixel opening area. The second opening area is located between the first opening area and the third opening area. The area of the second pixel opening area is larger than that of the first pixel opening area, and the area of the second pixel opening area is smaller than that of the third pixel opening area. The color filter layer is arranged on the substrate. The color filter layer is filled in the first pixel opening area, the second pixel opening area and the third pixel opening area. At least one of the plurality of optical sensors partially overlaps the color filter layer in a normal direction of the substrate and partially overlaps the light shielding layer.

Description

[0001] The present invention is a divisional application of the invention with application number 202010684694.0, application date July 16, 2020, and invention name “Display Device”. Technical Field

[0002] The present disclosure relates to a display device, and in particular to a display device including a gradient opening area. Background Art

[0003] Electronic products containing display panels, such as smartphones, tablets, laptops, monitors and TVs, have become an indispensable necessity in modern society. With the booming development of such portable electronic products, consumers have high expectations for the quality, functions or prices of these products.

[0004] Although existing display devices can generally meet their original intended uses, they still do not fully meet expectations in all aspects. For example, they still have problems such as uneven brightness. For example, when the fingerprint in display (FID) technology is integrated with the liquid crystal display panel, the placement of the fingerprint in display (FID) sensing element in some pixels increases the size difference of the pixel opening area of ​​the panel, thus causing problems such as uneven brightness of the display panel or inconsistent visual experience.

[0005] Therefore, developing a structural design that can further improve the quality or performance of the display device is still one of the research topics that the industry is committed to. Summary of the invention

[0006] According to some embodiments of the present disclosure, a display device is provided, comprising a substrate, a light shielding layer, a color filter layer and a plurality of optical sensors. The light shielding layer is disposed on the substrate. The light shielding layer has a first pixel opening area, a second pixel opening area and a third pixel opening area. The second opening area is located between the first opening area and the third opening area. The area of ​​the second pixel opening area is greater than the area of ​​the first pixel opening area, and the area of ​​the second pixel opening area is less than the area of ​​the third pixel opening area. The color filter layer is disposed on the substrate. The color filter layer is filled in the first pixel opening area, the second pixel opening area and the third pixel opening area. At least one of the plurality of optical sensors partially overlaps with the color filter layer in the normal direction of the substrate and partially overlaps with the light shielding layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to make the above-mentioned objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein:

[0008] Figure 1Showing a schematic cross-sectional structure diagram of a display device according to some embodiments of the present disclosure;

[0009] Figure 2 Showing a schematic diagram of a top view structure of a display device according to some embodiments of the present disclosure;

[0010] Figure 3 A schematic diagram showing a top view of some components in a display device according to some embodiments of the present disclosure;

[0011] Figure 4 According to some embodiments of the present disclosure, corresponding to Figure 3 A schematic cross-sectional structural diagram of the display device along the cross-sectional line BB';

[0012] Figure 5 A brightness-distance relationship diagram of an opening area and a backlight module in a display device according to some embodiments of the present disclosure is shown.

[0013] Explanation of symbols

[0014] 10: Display device

[0015] 100: Display panel

[0016] 100A: Opening area

[0017] 100T: Driving element

[0018] 102:Substrate

[0019] 104:Substrate

[0020] 106: Display medium layer

[0021] 108: Cover

[0022] 120: Light shielding layer

[0023] 122: Color filter layer

[0024] 122a: Color filter unit

[0025] 122b: Color filter unit

[0026] 122c: Color filter unit

[0027] 130: Semiconductor layer

[0028] 132: Source / drain electrode layer

[0029] 134: Gate dielectric layer

[0030] 136: Gate electrode layer

[0031] 140: Pixel electrode

[0032] 150: Optical sensor

[0033] 200: Backlight module

[0034] A1: First opening area

[0035] A2, A 2-1 , A 2-2 : Second opening area

[0036] A3: The third opening area

[0037] AA: Display area

[0038] B-B': Section line

[0039] FA: Fingerprint sensing area

[0040] PA: Non-display area

[0041] RS: Notch

[0042] W1: Width

[0043] W2: Width

[0044] W3: Width DETAILED DESCRIPTION

[0045] The following is a detailed description of the display device of the embodiment of the present disclosure. It should be understood that the following description provides many different embodiments or examples for implementing different aspects of some embodiments of the present disclosure. The specific elements and arrangements described below are only for simple and clear description of some embodiments of the present disclosure. Of course, these are only used for example and not for limitation of the present disclosure. In addition, similar and / or corresponding numbers may be used in different embodiments to indicate similar and / or corresponding elements to clearly describe the present disclosure. However, the use of these similar and / or corresponding numbers is only for the simple and clear description of some embodiments of the present disclosure, and does not represent any correlation between the different embodiments and / or structures discussed.

[0046] It should be understood that the elements or devices of the drawings may exist in various forms known to those skilled in the art. In addition, relative terms, such as "lower" or "bottom" or "higher" or "top", may be used in the embodiments to describe the relative relationship of one element of the drawings to another element. It is understood that if the device of the drawings is turned upside down, the element described on the "lower" side will become the element on the "higher" side. The embodiments of the present disclosure may be used in conjunction with the attached drawings. Figure 1 It is also understood that the drawings of the present disclosure are also considered as part of the disclosure. It should be understood that the drawings of the present disclosure are not drawn to scale, and in fact, the size of the elements may be arbitrarily enlarged or reduced to clearly show the features of the present disclosure.

[0047] Furthermore, when referring to a first material layer being located on or above a second material layer, it includes the situation where the first material layer is in direct contact with the second material layer, or the situation where there may be one or more other material layers in between, in which case the first material layer and the second material layer may not be in direct contact with each other.

[0048] In addition, it should be understood that the ordinal numbers used in the specification and claims, such as "first", "second", etc., to modify the elements, do not imply or represent any previous ordinal numbers of the (or the plurality of) elements, nor do they represent the order of one element and another element, or the order of the manufacturing method. The use of the plurality of ordinal numbers is only used to make the element with a certain name clearly distinguishable from another element with the same name. The claims and the specification may not use the same words, for example, the first element in the specification may be the second element in the claims.

[0049] In the text, the terms "about" and "substantially" usually mean within 10%, or within 5%, or within 3%, or within 2%, or within 1%, or within 0.5% of a given value or range. The numbers given here are approximate numbers, that is, in the absence of specific descriptions of "about" and "substantially", the meaning of "about" and "substantially" can still be implied. In addition, the term "range between a first value and a second value" means that the range includes the first value, the second value, and other values ​​between them.

[0050] In the text, the length and width may be measured by using an optical microscope, and the thickness may be measured by using a cross-sectional image in an electron microscope, but the present disclosure is not limited thereto.

[0051] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meanings as commonly understood by those skilled in the art to which the present disclosure belongs. It is understood that these terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning consistent with the background or context of the relevant technology and the present disclosure, and should not be interpreted in an idealized or overly formal manner unless specifically defined in the embodiments of the present disclosure.

[0052] It should be noted that the following embodiments can replace, reorganize, or mix the technical features in several different embodiments to complete other embodiments without departing from the spirit of the present disclosure. The features between the embodiments can be mixed and matched as long as they do not violate the spirit of the invention or conflict with each other.

[0053] According to some embodiments of the present disclosure, the provided display device includes a display panel with a gradient opening area, thereby improving problems such as uneven brightness of the display panel or inconsistent visual experience. In detail, according to some embodiments of the present disclosure, the light shielding layer of the display panel has openings with gradient sizes (corresponding to the opening area of ​​the pixel), which can reduce the visual difference caused by different pixel opening sizes. For example, in the example of integrating the fingerprint under the screen (FID) element with the liquid crystal display panel, the problem of the pixel brightness of the sensing element corresponding to the fingerprint under the screen being lower than other pixels can be reduced, thereby improving problems such as uneven brightness of the display panel or inconsistent visual experience. According to some embodiments of the present disclosure, the visual effect of the display device can also be improved by adjusting the brightness of the backlight module.

[0054] According to some embodiments of the present disclosure, the display device may include a touch display device, a sensing display device, or a spliced ​​display device, but is not limited thereto. The display device may be a bendable or flexible display device. The display device may, for example, include a light-emitting diode (LED), a liquid crystal, fluorescence, phosphorescence, a quantum dot (QD), other suitable materials, or a combination of the foregoing, but is not limited thereto. The light-emitting diode may, for example, include an organic light-emitting diode (OLED), an inorganic light-emitting diode (inorganic light-emitting diode), a sub-millimeter light-emitting diode (mini LED), a micro light-emitting diode (micro LED) or a quantum dot light-emitting diode (which may be, for example, QLED, QDLED), other suitable materials or a combination of the foregoing, but is not limited thereto. It should be understood that the display device of the present disclosure will be described below using a liquid crystal display device as an example, but the present disclosure is not limited thereto.

[0055] Please refer to Figure 1 , Figure 1 A schematic diagram of a cross-sectional structure of a display device 10 according to some embodiments of the present disclosure is shown. It should be understood that for the sake of clarity, some elements of the display device 10 are omitted in the figure, and only some elements of the display device 10 are schematically shown, while other elements will be described later. According to some embodiments, additional features may be added to the display device 10 described below. In other embodiments, some features of the display device 10 described below may be replaced or omitted.

[0056] like Figure 1As shown, the display device 10 may include a display panel 100. According to some embodiments, the display panel 100 may further include a substrate 102, a substrate 104, a display medium layer 106, and a cover plate 108. The substrate 102 and the substrate 104 may be disposed opposite to each other, the display medium layer 106 may be disposed between the substrate 102 and the substrate 104, and the cover plate 108 may be disposed on the substrate 104.

[0057] According to some embodiments, the substrate 102 may be used as a driving substrate (or array substrate), but the present disclosure is not limited thereto. According to some embodiments, the display device 10 may include a driving circuit (not shown) disposed on or in the substrate 102, and the driving circuit may include an active driving circuit and / or a passive driving circuit. According to some embodiments, the driving circuit may include a transistor (for example, a switching transistor or a driving transistor, etc.), a data line, a scanning line, a conductive pad, a dielectric layer or other circuits, etc., but is not limited thereto. The switching transistor can be used to control the switching of the pixel. According to some embodiments, the driving circuit can control the pixels of the display device 10 by means of an external integrated circuit (IC) or chip, etc., but is not limited thereto. In addition, according to some embodiments, the substrate 102 may further include an electrode layer (not shown), and the electrode layer may be coupled to the aforementioned driving circuit.

[0058] According to some embodiments, the substrate 104 may be used as a color filter substrate, but the present disclosure is not limited thereto. According to some embodiments, the display device 10 may include a light shielding layer and / or a color filter layer disposed on the substrate 104. Figure 4 Detailed description.

[0059] Furthermore, the substrate 102 and the substrate 104 include a flexible substrate, a rigid substrate, or a combination thereof. According to some embodiments, the materials of the substrate 102 and the substrate 104 may include glass, quartz, sapphire, ceramic, polyimide (PI), liquid crystal polymer (LCP) material, polycarbonate (PC), photosensitive polyimide (PSPI), polyethylene terephthalate (PET), other suitable materials, or a combination of the foregoing materials, but are not limited thereto. According to some embodiments, the substrate 102 and the substrate 104 may include a printed circuit board (PCB). In addition, the material of the substrate 102 may be the same as or different from the material of the substrate 104. In addition, the light transmittance of the substrate 102 and the substrate 104 is not limited, that is, the substrate 102 and the substrate 104 may be a light-transmitting substrate, a semi-transmitting substrate, or an opaque substrate.

[0060] According to some embodiments, the display medium layer 106 may include a liquid crystal material, or other suitable modulation materials, but is not limited thereto. The liquid crystal material may include nematic liquid crystal, smectic liquid crystal, cholesteric liquid crystal, blue phase liquid crystal, suitable liquid crystal materials thereof, or a combination thereof. Further, according to some embodiments, the display device 10 may include a touch liquid crystal display device. Alternatively, the display device 10 may include a twisted nematic (TN) type liquid crystal display device, a super twisted nematic (STN) type liquid crystal display device, a double layer super twisted nematic (DSTN) type liquid crystal display device, a vertical alignment (VA) type liquid crystal display device, an in-plane switching (IPS) type liquid crystal display device, a cholesteric liquid crystal display device, a blue phase type liquid crystal display device, a fringe field switching (FFS) type liquid crystal display device, other suitable liquid crystal display devices, or a combination thereof.

[0061] In some embodiments where the display medium layer 106 includes liquid crystal material, the liquid crystal layer may be formed by one drop filling (ODF) before the substrates 102 and 104 are aligned, or the liquid crystal material may be filled by vacuum injection after the alignment, but the disclosure is not limited thereto.

[0062] According to some embodiments, the cover plate 108 may provide a surface for touch control and operation, and protect the substrate 104, the display medium layer 106, and the substrate 102 located thereunder. According to some embodiments, the material of the cover plate 108 may include glass, quartz, sapphire, ceramic, other suitable materials, or a combination of the foregoing materials, but is not limited thereto.

[0063] In addition, according to some embodiments, the display device 10 may further include a backlight module 200, and the backlight module 200 is disposed corresponding to the display panel 100. In detail, according to some embodiments, the display panel 100 at least partially overlaps with the backlight module 200 in the normal direction Z of the substrate 102. The backlight module 200 can provide light sources to the display panel 100 in different forms. According to some embodiments, the backlight module 200 can be a direct lit backlight module. According to some embodiments, the backlight module 200 can be an edge lit backlight module.

[0064] According to some embodiments, the backlight module 200 may include a light emitting diode (LED), such as an inorganic light emitting diode (ILD), an organic light emitting diode (OLED), a sub-millimeter light emitting diode (mini LED), a micro LED or a quantum dot (QD) light emitting diode (QLED or QDLED), fluorescence, phosphor, other suitable materials, or a combination of the foregoing, but not limited thereto.

[0065] Next, please refer to Figure 2 , Figure 2 A schematic diagram showing a top view of the structure of a display device 10 according to some embodiments of the present disclosure is shown. Figure 2 The relative positions of the display area AA, the non-display area PA and the fingerprint sensing area FA in the display panel 100 of the display device 10 are shown. Figure 2 As shown, according to some embodiments, the non-display area PA is located at the periphery and is disposed around the display area AA, and the display area AA includes a fingerprint sensing area FA, and a finger can be fingerprint sensed at any position in the fingerprint sensing area FA.

[0066] According to some embodiments, the fingerprint sensing area FA partially overlaps with the display area AA in the normal direction Z of the substrate 102. According to some embodiments, the fingerprint sensing area FA is disposed close to one side of the display area AA, for example, disposed at the lower part of the display area AA (e.g., Figure 2 In addition, in some embodiments where the backlight module 200 (not shown) is an edge-type backlight module, the light incident side of the light source may be adjacent to the fingerprint sensing area FA, for example, the light source and the fingerprint sensing area FA are located on the same side of the display device 10, but the disclosure is not limited thereto. In other words, according to some embodiments, the display area AA overlapping the fingerprint sensing area FA is closer to the light incident side than other display areas AA not overlapping the fingerprint sensing area FA.

[0067] Next, please refer to Figure 3 as well as Figure 4 , Figure 3 A schematic diagram of the structure of some components in the display device 10 according to some embodiments of the present disclosure is shown from above. Figure 4 According to some embodiments of the present disclosure, corresponding to Figure 3 A schematic diagram of the cross-sectional structure of the display device along the cross-sectional line BB'. Figure 3 As shown, according to some embodiments, the display device 10 may include a light shielding layer 120 and a color filter layer 122 .

[0068] According to some embodiments, the display panel 100 may include a light shielding layer 120 and a color filter layer 122 disposed on a substrate 104 (eg, Figure 4 According to some embodiments, Figure 3 As shown, the light shielding layer 120 may have a plurality of opening regions 100A, and the color filter layer 122 may be filled in the opening regions 100A.

[0069] Specifically, according to some embodiments, the opening area 100A of the light shielding layer 120 is the opening area of ​​the pixel. It should be understood that, for the sake of clarity, the following description uses different element symbols and ordinals to represent the opening areas 100A located in different areas (e.g., located in the fingerprint sensing area FA or located outside the fingerprint sensing area FA) or in different states.

[0070] According to some embodiments, the opening area 100A includes a plurality of first opening areas A1, a plurality of second opening areas A2, and a plurality of third opening areas A3, and the first opening area A1, the second opening area A2, and the third opening area A3 may be disposed on the substrate 104, and the second opening area A2 is located between the first opening area A1 and the third opening area A3. According to some embodiments, the areas of the first opening area A1, the second opening area A2, and the third opening area A3 are different from each other. According to some embodiments, the area of ​​at least one of the second opening areas A2 is greater than the area of ​​at least one of the first opening areas A1, and the area of ​​at least one of the second opening areas A2 is smaller than the area of ​​at least one of the third opening areas A3. According to some embodiments, the areas of the second opening areas A2 are all greater than the areas of the first opening areas A1, and the areas of the second opening areas A2 are all smaller than the areas of the third opening areas A3, but are not limited thereto.

[0071] According to some embodiments, the first opening area A1 is located in the fingerprint sensing area FA, that is, the first opening area A1 overlaps with the fingerprint sensing area FA in the normal direction Z of the substrate 102. According to some embodiments, the second opening area A2 and the third opening area A3 are located outside the fingerprint sensing area FA. According to some embodiments, compared with the third opening area A3, the second opening area A2 is closer to the fingerprint sensing area FA. According to some embodiments, the color filter layer 122 overlaps with the first opening area A1, the second opening area A2, and the third opening area A3 in the normal direction Z of the substrate 102.

[0072] In addition, if Figure 3 As shown, according to some embodiments, the display device 10 may include a plurality of optical sensors 150, and the optical sensors 150 are located in the fingerprint sensing area FA. The optical sensors 150 may sense the touch of a finger and convert it into an electronic signal to a corresponding driving element or a signal processing element for identification and analysis. According to some embodiments, the pixel area with the optical sensors 150 substantially corresponds to the fingerprint sensing area FA.

[0073] According to some embodiments, at least a portion of at least one of the optical sensors 150 overlaps with at least one of the first opening areas A1 in the normal direction Z of the substrate 102. According to some embodiments, one of the first opening areas A1 overlaps with one of the optical sensors 150, but is not limited thereto. According to other embodiments, one of the first opening areas A1 may overlap with a plurality of the optical sensors 150. According to some embodiments, at least a portion of at least one of the optical sensors 150 overlaps with the color filter layer 122 in the normal direction Z of the substrate 102. Further, according to some embodiments, the optical sensor 150 partially overlaps with the color filter layer 122 in the normal direction Z of the substrate 102, and partially overlaps with the light shielding layer 120. According to some embodiments, a portion of the pixel regions located in the fingerprint sensing area FA may have the optical sensor 150, while a portion of the pixel regions may not have the optical sensor 150, that is, not all the pixel regions located in the fingerprint sensing area FA have the optical sensor 150.

[0074] According to some embodiments, the areas between the plurality of first opening areas A1 located in the fingerprint sensing area FA are substantially the same, and the areas between the plurality of third opening areas A3 farther away from the fingerprint sensing area FA are substantially the same. It is worth noting that according to some embodiments, the second opening area A2 is located between the first opening area A1 and the third opening area A3, and the area of ​​the second opening area A2 may be between the area of ​​the first opening area A1 and the area of ​​the third opening area A3, and the area of ​​the second opening area A2 may be gradual, that is, the areas between the plurality of second opening areas A2 are different, and the area size may be gradually changed, but is not limited thereto.

[0075] According to some embodiments, the opening area 100A with a gradually varying area can reduce the visual difference caused by the first opening area A1 and the third opening area A3 of different sizes, thereby improving the uneven brightness or inconsistent visual experience of the display panel 100 .

[0076] Specifically, according to some embodiments, along the direction from the first opening area A1 to the third opening area A3 (e.g., the Y direction shown in the figure) (or in the direction away from the fingerprint sensing area FA), the area of ​​the second opening area A2 gradually decreases, that is, the area of ​​the color filter layer 122 exposed by the light shielding layer 120 gradually decreases. Figure 3 As shown, the second opening area A 2-1 The area is smaller than the second opening area A 2-2 The area of ​​the second opening area A 2-1 The second opening area A 2-2 Closer to the first opening area A1 (or fingerprint sensing area FA).

[0077] In detail, the second opening area A2 may be referred to as an opening gradient area of ​​the display panel 100, and the opening gradient area may be defined as an opening area whose area begins to be different from that of the first opening area A1 (for example, the second opening area A2 shown in FIG. 2-1 ) to an opening area that begins to differ from the third opening area A3 in area (for example, the second opening area A shown in the figure 2-2 ) between the .

[0078] According to some embodiments, the ratio between the area of ​​the first opening area A1 and the area of ​​the third opening area A3 is between about 20% and about 70% (20% ≤ ratio ≤ 70%), or between about 36% and about 56% (36% ≤ ratio ≤ 56%). According to some embodiments, the ratio between the area of ​​the first opening area A1 and the area of ​​the second opening area A2 is between about 40% and about 85% (40% ≤ ratio ≤ 85%), or between about 55% and about 75% (55% ≤ ratio ≤ 75%). According to some embodiments, the ratio between the area of ​​the second opening area A2 and the area of ​​the third opening area A3 is between about 50% and about 85% (50% ≤ ratio ≤ 85%), or between about 65% and about 80% (65% ≤ ratio ≤ 80%). By designing the ratio between the areas of different opening areas within the above range, the display panel can have a more uniform brightness distribution.

[0079] According to some embodiments, Figure 3 As shown, the area of ​​the opening area 100A can be reduced by increasing the overlapping area of ​​the light shielding layer 120 and the color filter layer 122, that is, the area of ​​the color filter layer 122 exposed by the light shielding layer 120 is reduced. According to some embodiments, compared with the third opening area A3, the light shielding layer 120 can, for example, extend and protrude to form a recess RS in the first opening area A1 and the second opening area A2. According to some embodiments, the optical sensor 150 can overlap with the recess RS of the first opening area A1 in the normal direction Z of the substrate 102.

[0080] However, it should be understood that although the embodiment shown in the drawings reduces the area of ​​the opening region 100A of the display panel 100 by extending the light-shielding layer 120 to form the recess RS, the method of reducing the area of ​​the opening region 100A is not limited to this, and the shape of the opening region 100A is not limited to this. According to different embodiments, the opening region 100A may have other suitable shapes.

[0081] In addition, it should be understood that the number of opening areas 100A shown in the drawings is for illustration only, and according to different embodiments, the display panel 100 may have other suitable numbers of opening areas 100A (first opening area A1, second opening area A2 and third opening area A3).

[0082] Furthermore, according to some embodiments, the light shielding layer 120 may include a black matrix. The color filter layer 122 may filter or adjust the optical properties of the light passing through it, for example, allowing light of a specific wavelength range to pass through. According to some embodiments, the display device 10 may include a plurality of scan lines (not shown) and a plurality of data lines (not shown), and the scan lines and the data lines may extend in directions substantially perpendicular to each other. The scan lines and the data lines may overlap with the light shielding layer 120 in the normal direction Z of the substrate 102, but is not limited thereto.

[0083] like Figure 3 As shown, according to some embodiments, the color filter layer 122 may include a plurality of color filter units, for example, a color filter unit 122a, a color filter unit 122b, and a color filter unit 122c. For example, according to some embodiments, the color filter unit 122a, the color filter unit 122b, and the color filter unit 122c may include a red filter unit, a green filter unit, and a blue filter unit, but the present disclosure is not limited thereto. In addition, it should be understood that, although in the embodiment shown in the drawings, the color filter layer 122 includes three color filter units, according to other embodiments, the color filter layer 122 may have other suitable numbers or colors of color filter units.

[0084] According to some embodiments, the material of the light shielding layer 120 may include black photoresist, black printing ink, black resin, metal, carbon black material, resin material, photosensitive material, other suitable materials, or a combination thereof, but not limited thereto. According to some embodiments, the material of the color filter layer 122 may include color photoresist, and the material of the color photoresist may include, for example, a polymer material and a pigment and a photosensitive material dispersed therein. In one embodiment, the polymer material may include epoxy resin, acrylic resin such as polymethylmethacrylate (PMMA), benzocyclobutene (BCB), other suitable materials, or a combination thereof, but not limited thereto.

[0085] According to some embodiments, the light shielding layer 120 and the color filter layer 122 may be formed by a coating process, a deposition process, a printing process, an evaporation process, a sputtering process, other suitable processes, or a combination thereof.

[0086] In addition, according to some embodiments, the light shielding layer 120 and the color filter layer 122 may be patterned to have a suitable shape and profile by a photolithography process and / or an etching process. According to some embodiments, the photolithography process may include photoresist coating (e.g., spin coating), soft baking, hard baking, mask alignment, exposure, post-exposure baking, photoresist development, cleaning and drying, etc., but is not limited thereto. The etching process may include a dry etching process or a wet etching process, but is not limited thereto.

[0087] According to some embodiments, the optical sensor 150 may include a photodiode, or other elements capable of converting optical signals into electrical signals, or a combination thereof.

[0088] Next, please refer to Figure 4 , Figure 4 The configuration relationship of the components in the display device 10 is further described. It should be understood that for the sake of clarity, Figure 4 Not all opening areas 100A corresponding to the cross-sectional line BB′ are shown, only a first opening area A1, a second opening area A2 and a third opening area A3 are shown, and the first opening area A1, the second opening area A2 and the third opening area A3 not shown have similar structures.

[0089] like Figure 4 As shown, according to some embodiments, the display panel 100 of the display device 10 further includes a driving element 100T and a pixel electrode 140, and the driving element 100T and the pixel electrode 140 are disposed on the substrate 102. According to some embodiments, the driving element 100T includes a transistor, such as a switch transistor or a driving transistor. In detail, the driving element 100T may include a semiconductor layer 130, a source / drain electrode layer 132, a gate dielectric layer 134, and a gate electrode layer 136. According to some embodiments, the gate dielectric layer 134 and the gate electrode layer 136 are disposed on the semiconductor layer 130, the gate dielectric layer 134 is disposed between the semiconductor layer 130 and the gate electrode layer 136, the gate electrode layer 136 overlaps the semiconductor layer 130, and the source / drain electrode layer 132 is disposed on both sides of the semiconductor layer 130, and overlaps with parts of both sides of the semiconductor layer 130 respectively.

[0090] According to some embodiments, the material of the semiconductor layer 130 may include elemental semiconductors, including silicon and germanium; compound semiconductors, including gallium nitride (GaN), silicon carbide, gallium arsenide, gallium phosphide, indium phosphide, indium arsenide and / or indium antimonide; alloy semiconductors, including silicon-germanium alloy (SiGe), gallium arsenide phosphide alloy (GaAsP), aluminum indium arsenic alloy (AlInAs), aluminum gallium arsenide alloy (AlGaAs), indium gallium arsenide alloy (GaInAs), gallium indium phosphide alloy (GaInP) and / or gallium indium arsenide phosphide alloy (GaInAsP), other suitable materials, or combinations thereof, but not limited thereto.

[0091] According to some embodiments, the material of the source / drain electrode layer 132 may include copper, aluminum, molybdenum, tungsten, gold, chromium, nickel, platinum, titanium, iridium, rhodium, copper alloy, aluminum alloy, molybdenum alloy, tungsten alloy, gold alloy, chromium alloy, nickel alloy, platinum alloy, titanium alloy, iridium alloy, rhodium alloy, other suitable conductive materials, or combinations of the foregoing, but are not limited thereto.

[0092] According to some embodiments, the material of the gate dielectric layer 134 may include silicon oxide, silicon nitride, silicon oxynitride, high-k dielectric material, other suitable dielectric materials, or combinations thereof, but not limited thereto. The high-k dielectric material may include metal oxide, metal nitride, metal silicide, transition metal oxide, transition metal nitride, transition metal silicide, metal oxynitride, metal aluminate, zirconium silicate, zirconium aluminate, or combinations thereof, but not limited thereto.

[0093] Furthermore, according to some embodiments, the material of the gate electrode layer 136 may include amorphous silicon, polycrystalline silicon, one or more metals, metal nitrides, conductive metal oxides, or a combination thereof, but not limited thereto. The aforementioned metal may include molybdenum, tungsten, titanium, tantalum, platinum, hafnium, or a combination thereof, but not limited thereto. The aforementioned metal nitride may include molybdenum nitride, tungsten nitride, titanium nitride, tantalum nitride, or a combination thereof, but not limited thereto.

[0094] According to some embodiments, the various layers of the driving element 100T may be formed by a physical vapor deposition (PVD) process, a chemical vapor deposition (CVD) process, a coating process, other suitable methods or a combination thereof. The aforementioned physical vapor deposition process may include, for example, a sputtering process, an evaporation process or a pulsed laser deposition process. The aforementioned chemical vapor deposition process may include, for example, a low pressure chemical vapor deposition (LPCVD) process, a low temperature chemical vapor deposition (LTCVD) process, a rapid temperature rise chemical vapor deposition (RTCVD) process, a plasma assisted chemical vapor deposition (PECVD) process or an atomic layer deposition (ALD) process.

[0095] Furthermore, it should be understood that although Figure 4 In the illustrated embodiment, the driving element 100T is a top gate thin film transistor. However, according to other embodiments, the driving element 100T may be a bottom gate thin film transistor or a dual gate or double gate thin film transistor.

[0096] Furthermore, the pixel electrode 140 is electrically connected to the driving element 100T (e.g., the source / drain electrode layer 132), but is not limited thereto. According to some embodiments, the material of the pixel electrode 140 may include a metal conductive material, a transparent conductive material, other suitable materials, or a combination thereof, but is not limited thereto. The metal conductive material may include copper, aluminum, tungsten, titanium, gold, platinum, nickel, a copper alloy, an aluminum alloy, a tungsten alloy, a titanium alloy, a gold alloy, a platinum alloy, a nickel alloy, or a combination thereof, but is not limited thereto. The transparent conductive material may include a transparent conductive oxide (TCO). For example, the transparent conductive oxide may include indium tin oxide (ITO), tin oxide (SnO), zinc oxide (ZnO), indium zinc oxide (IZO), indium gallium zinc oxide (IGZO), indium tin oxide (ITZO), antimony tin oxide (ATO), antimony zinc oxide (AZO), or a combination thereof, but is not limited thereto.

[0097] In addition, as mentioned above, the optical sensor 150 may be disposed on the substrate 102 and located in the fingerprint sensing area FA. According to some embodiments, the optical sensor 150 may be electrically connected to the driving element 100T (e.g., the source / drain electrode layer 132) and the pixel electrode 140, but is not limited thereto. According to some embodiments, the optical sensor 150 at least partially overlaps with the first opening area A1 in the normal direction Z of the substrate 102. According to some embodiments, the optical sensor 150 and the first opening area A1 may completely overlap.

[0098] Furthermore, as mentioned above, the light shielding layer 120 and the color filter layer 122 (color filter unit 122a) can be disposed on the substrate 104 and located between the substrate 102 and the substrate 104. According to some embodiments, the light shielding layer 120 can be formed on the substrate 104 first, and then the color filter layer 122 can be formed on the substrate 104, but the present disclosure is not limited thereto. According to some embodiments, in the normal direction Z of the substrate 102, the light shielding layer 120 and the color filter layer 122 can partially overlap. Furthermore, according to some embodiments, the color filter layer 122 is not disposed on the substrate 104, but is disposed on the substrate 102. According to other embodiments, the light shielding layer 120 and the color filter layer 122 are both disposed on the substrate 102.

[0099] According to some embodiments, the color filter layer 122 (color filter unit 122a) disposed in the fingerprint sensing area FA has a width W1 in the first opening area A1, the color filter layer 122 (color filter unit 122a) has a width W2 in the second opening area A2, and the color filter layer 122 (color filter unit 122a) has a width W3 in the third opening area A3, and the width W3 is greater than the width W2, and the width W2 is greater than the width W1 (that is, the width W3> the width W2> the width W1). According to some embodiments, the width W1, the width W2, and the width W3 can be obtained by increasing the width W1 in the Y direction (such as Figure 3 ) is obtained by measuring the minimum width of the color filter layer 122 (color filter unit 122a) in the first opening area A1, the second opening area A2 and the third opening area A3 respectively.

[0100] Specifically, an optical microscope (OM) can be used to obtain photographs of the first opening area A1, the second opening area A2, and the third opening area A3 (similar to Figure 3), and draw a virtual extension line in the Y direction, the virtual extension line passes through the notch RS of the first opening area A1, the notch RS of the second opening area A2, and the third opening area A3 at the same time, and measure the widths of the first opening area A1, the second opening area A2, and the third opening area A3 on the virtual extension line to obtain widths W1, W2, and W3. In other embodiments, if other designs are used to obtain a gradual opening area, the structural part that causes the gradual difference can be measured to compare widths W1, W2, and W3.

[0101] like Figure 4 As shown, according to some embodiments, the display medium layer 106 is disposed between the driving element 100T and the light shielding layer 120, or the display medium layer 106 is disposed between the driving element 100T and the color filter layer 122. In addition, according to some embodiments, the display panel 100 may further include structures such as an alignment layer (not shown) and a spacer (not shown), and the alignment layer may be conformably disposed on the light shielding layer 120, the color filter layer 122, the driving element 100T, the pixel electrode 140 and the optical sensor 150, but is not limited thereto, and the spacer may be disposed between the substrate 102 and the substrate 104.

[0102] The alignment layer can help control the material properties (e.g., dielectric properties or arrangement direction, etc.) in the display medium layer 106, thereby controlling the display characteristics of the pixels of the display panel 100. According to some embodiments, the material of the alignment layer may include an organic material, an inorganic material, or a combination of the foregoing. For example, the organic material may include polyimide (PI), polyvinyl cinnamate (PVCN), polymethylmethacrylate (PMMA), other photoreactive polymer materials, or a combination of the foregoing, but not limited thereto. The inorganic material may, for example, include silicon dioxide (SiO2), silicon carbide (SiC), glass, silicon nitride (Si3N4), aluminum oxide (Al2O3), cerium oxide (CeO2), other inorganic materials with alignment function, or a combination of the foregoing, but not limited thereto. According to some embodiments, the alignment layer may be formed by a coating process, a chemical deposition process, a printing process, other suitable processes, or a combination of the foregoing.

[0103] Furthermore, the spacer can maintain the gap (cell gap) between the substrate 102 and the substrate 104 or can strengthen the structural strength of the display panel 100. According to some embodiments, the material of the spacer may include an organic material. According to some embodiments, the aforementioned organic material may include epoxy resin, acrylic resin such as polymethylmetacrylate (PMMA), benzocyclobutene (BCB), polyethyleneterephthalate (PET), polyethylene (PE), polyethersulfone (PES), polycarbonate (PC), other suitable materials, or a combination of the foregoing, but not limited thereto. According to some embodiments, the spacer can be formed by a coating process, a deposition process, a printing process, other suitable processes, or a combination of the foregoing. According to some embodiments, the spacer can be patterned by a photolithography process.

[0104] In addition, the backlight module 200 is disposed corresponding to the display panel 100. According to some embodiments, the backlight module 200 may be disposed below the display panel 100. In addition, according to some embodiments, the brightness of at least one of the second opening areas A2 of the backlight module 200 is less than the brightness of at least one of the first opening areas A1, and the brightness of at least one of the second opening areas A2 of the backlight module 200 is greater than the brightness of at least one of the third opening areas A3. In other words, according to some embodiments, the brightness of the backlight module 200 changes with the area of ​​the opening area 100A, for example, the brightness corresponding to the first opening area A1 with a smaller area is greater than the brightness corresponding to the second opening area A2 or the third opening area A3 with a larger area, and the brightness corresponding to the second opening area A2 with a smaller area is greater than the brightness corresponding to the third opening area A3 with a larger area.

[0105] According to some embodiments, in the backlight module 200, the ratio between the brightness corresponding to the first opening area A1 and the brightness corresponding to the third opening area A3 is between about 1.52 and about 2.81 (1.52≤ratio≤2.81), or between about 1.95 and about 2.38 (1.95≤ratio≤2.38). According to some embodiments, in the backlight module 200, the ratio between the brightness corresponding to the first opening area A1 and the brightness corresponding to the second opening area A2 is between about 1.11 and about 2.06 (1.11≤ratio≤2.06), or between about 1.42 and about 1.74 (1.42≤ratio≤1.74). According to some embodiments, in the backlight module 200, the ratio between the brightness corresponding to the second opening area A2 and the brightness corresponding to the third opening area A3 is between about 1.09 and about 1.64 (1.09≤ratio≤1.64), or between about 1.23 and about 1.50 (1.23≤ratio≤1.50). By designing the brightness ratio between different opening areas within the above range, the display panel can have a more uniform brightness distribution.

[0106] Please refer to Figure 5 , Figure 5 The following diagram shows the relationship between the brightness and distance of the opening area and the backlight module in the display device according to some embodiments of the present disclosure. Figure 5 The display backlight module, the area 1 of the opening area, and the area 2 of the opening area show the change in brightness as the distance from the light source increases. The area 1 of the opening area refers to an example where a gradient opening is not used, and the area 2 of the opening area refers to an example where a gradient opening is used according to an embodiment of the present disclosure.

[0107] like Figure 5 As shown, when the distance between the backlight module and the light source increases, the brightness gradually decreases (for example, an edge-entry backlight module). When the area 1 of the opening area increases in distance from the light source, the brightness suddenly increases significantly because the opening area of ​​the pixel increases suddenly in the area without the fingerprint sensing area. When the area 2 of the opening area increases in distance from the light source, the brightness slowly increases from the position with the fingerprint sensing area (for example, the first opening area A1) to the position without the fingerprint sensing area (for example, the third opening area A3) because the pixel has a gradual opening. In this case, with the backlight module whose brightness gradually decreases, an almost uniform total brightness can be obtained, that is, the brightness presented by the display panel is uniform. In other embodiments, a direct-type backlight module can also be used to adjust the brightness of the light sources in different areas by matching the area design of the opening area or the position of the fingerprint sensing area, so as to achieve the desired optical effect.

[0108] In summary, according to some embodiments of the present disclosure, a display device is provided that includes a display panel with a gradient opening area, thereby improving problems such as uneven brightness of the display panel or inconsistent visual experience. According to some embodiments of the present disclosure, the visual effect of the display device can be improved by adjusting the brightness of the backlight module. According to some embodiments of the present disclosure, the brightness uniformity of a display device including a fingerprint sensing element under the screen can be effectively improved.

[0109] Although the embodiments and advantages of the present disclosure have been disclosed as above, it should be understood that any technician in the relevant technical field can make modifications, substitutions and embellishments without departing from the spirit and scope of the present disclosure. The features between the embodiments of the present disclosure can be mixed and matched as needed as long as they do not violate the spirit of the invention or conflict with each other. In addition, the scope of protection of the present disclosure is not limited to the processes, machines, manufacturing, material compositions, devices, methods and steps in the specific embodiments described in the specification. Any technician in the relevant technical field can understand the current or future developed processes, machines, manufacturing, material compositions, devices, methods and steps from the disclosure of the present disclosure. As long as they can implement roughly the same functions or obtain roughly the same results in the embodiments described here, they can be used according to the present disclosure. Therefore, the scope of protection of the present disclosure includes the above-mentioned processes, machines, manufacturing, material compositions, devices, methods and steps. The scope of protection of the present disclosure shall be based on the definition of the claims. Any embodiment or claim of the present disclosure does not need to achieve all the purposes, advantages and features of the present disclosure.

Claims

1. A display device, characterized in that: include: substrate; a light shielding layer, disposed on the substrate, the light shielding layer having a first pixel opening region, a second pixel opening region and a third pixel opening region, wherein the second pixel opening region is located between the first pixel opening region and the third pixel opening region, wherein an area of ​​the second pixel opening region is larger than an area of ​​the first pixel opening region, and an area of ​​the second pixel opening region is smaller than an area of ​​the third pixel opening region; A color filter layer is disposed on the substrate, and the color filter layer is filled in the first pixel opening area, the second pixel opening area, and the third pixel opening area; as well as A plurality of optical sensors, wherein at least one of the plurality of optical sensors partially overlaps with the color filter layer and partially overlaps with the light shielding layer in a normal direction of the substrate.

2. The display device according to claim 1, wherein: The light shielding layer includes a black matrix.

3. The display device according to claim 1, wherein: The optical sensor includes a photodiode.

4. The display device according to claim 1, wherein: The color filter layer includes a red filter unit, a green filter unit and a blue filter unit.

5. The display device according to claim 1, wherein: Also includes: The first driving element, the second driving element and the third driving element are disposed on the substrate. The first driving element, the second driving element and the third driving element overlap with the first pixel opening area, the second pixel opening area and the third pixel opening area respectively.

6. The display device according to claim 1, wherein: The first pixel opening region, the second pixel opening region, and the third pixel opening region have different shapes.

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