Method for identifying the fingerprint of a subject

Abstract

The present invention provides a method for identifying a subject's fingerprint, comprising the following steps: providing a display device, comprising: a plurality of fingerprint recognition units, a plurality of first sub-pixel areas having a first color, a plurality of second sub-pixel areas having a second color, and a plurality of third sub-pixel areas having a third color, wherein the first color, the second color, and the third color are different; when the display device is in a fingerprint recognition mode, defining a recognition area by placing a finger of the subject on the display device; and when the display device is in the fingerprint recognition mode, activating at least one of the first sub-pixel areas set in the recognition area, and disabling at least one of the second sub-pixel areas and the third sub-pixel areas set in the recognition area.

Description

Technical Field

[0001] The present disclosure relates to a method for identifying a subject's fingerprint. Background Art

[0002] Display devices are used in a wide variety of applications, such as mobile phones, notebook computers, video cameras, still cameras, music players, mobile navigation devices, and televisions.

[0003] As technologies related to display devices continue to advance, display devices can now have other functions besides display functions. For example, display devices integrated with fingerprint recognition units are currently being developed. If the fingerprint recognition unit is set within the pixel area, a portion of the pixel area needs to be used to set up the fingerprint recognition unit, resulting in a decrease in the brightness of the display device. Therefore, a portion of the blue sub-pixel area can be replaced with a white sub-pixel area to increase the brightness of the display device, but such a display device may have poor fingerprint recognition capabilities.

[0004] Therefore, it is necessary to provide a new fingerprint recognition method to improve the accuracy of fingerprint recognition. Summary of the Invention

[0005] The present disclosure aims to provide a method for identifying a subject's fingerprint, characterized in that it includes the following steps: providing a display device, wherein the display device includes: a plurality of fingerprint recognition units, a plurality of first sub-pixel areas having a first color, a plurality of second sub-pixel areas having a second color, and a plurality of third sub-pixel areas having a third color, wherein the first color, the second color, and the third color are different; when the display device is in a fingerprint recognition mode, defining a recognition area of the display device by placing a finger of the subject on the display device; and when the display device is in the fingerprint recognition mode, activating at least one of the first sub-pixel areas set in the recognition area, and disabling at least one of the second sub-pixel areas and the third sub-pixel areas set in the recognition area.

[0006] Other novel features of the present disclosure will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 FIG. 1 is a schematic diagram of a display device according to an embodiment of the present disclosure.

[0008] Figure 2 FIG. 4 is a schematic diagram of a pixel region in a display device according to an embodiment of the present disclosure.

[0009] Figure 3 FIG. 4 is a block diagram of a fingerprint recognition method according to an embodiment of the present disclosure.

[0010] Figure 4 FIG. 4 is a schematic diagram of a display device in a fingerprint recognition mode according to an embodiment of the present disclosure.

[0011] Figure 5 FIG. 4 is a schematic diagram of a display device in a fingerprint recognition mode according to another embodiment of the present disclosure.

[0012] Figure 6 To follow Figure 2 Schematic cross-sectional view of the display device along line AB is shown.

[0013] [Description of Reference Numerals]

[0014] 100-Display device

[0015] 11-First substrate

[0016] 121-first insulating layer

[0017] 122-Second insulation layer

[0018] 123-Third insulation layer

[0019] 13-First transparent electrode

[0020] 14-Second transparent electrode

[0021] 15-Display medium layer

[0022] 16-Second substrate

[0023] 17-Color filter layer

[0024] 18-Light-shielding layer

[0025] 181-Opening

[0026] 21-First electrode

[0027] 22-Second electrode

[0028] 23-Active layer

[0029] 231-Intrinsic semiconductor region

[0030] 232-n + area

[0031] 233-p + area

[0032] A1-Identification Area

[0033] A2-Non-recognition area

[0034] C1-first sub-pixel area

[0035] C2-second sub-pixel area

[0036] C3-third sub-pixel area

[0037] C4-fourth sub-pixel area

[0038] P1-first pixel area

[0039] P2-second pixel area

[0040] S1-first fingerprint recognition unit

[0041] S2-Second fingerprint recognition unit

[0042] S11, S12, S13 - Steps DETAILED DESCRIPTION

[0043] The following description provides different embodiments of the present disclosure, which are used to explain the technical content of the present disclosure but are not used to limit the scope of the present disclosure. The features described in one embodiment can be applied to other embodiments through appropriate modification, replacement, combination or separation.

[0044] It should be noted that, in this specification, when a component is described as comprising a component, it means that the component may include one or more components, and does not mean that the component includes only one component, unless otherwise specified.

[0045] Furthermore, in this specification, ordinal numbers such as "first" or "second" are used to distinguish multiple components with the same name and do not imply a hierarchy, grade, execution order, or manufacturing order between the components, unless otherwise specified. The "first" component and the "second" component may exist together in the same component, or they may exist separately in different components. The presence of a component described by a larger ordinal number does not inherently imply the presence of another component described by a smaller ordinal number.

[0046] In this specification, unless otherwise specified, feature A “or” or “and / or” feature B means that feature A exists, feature B exists, or both feature A and feature B exist. Feature A “and” feature B means that both feature A and feature B exist. The terms “comprises,” “includes,” “contains,” and “has” mean “including / includes, but not limited to.”

[0047] In addition, in this specification, terms such as "top", "above", "bottom", "front", "back" or "middle" and "up", "above", "above", "below", "under" or "between" are used to describe the relative positions between multiple components, and the relative positions can be interpreted as including their translation, rotation or reflection.

[0048] In addition, terms such as "above," "over," or "upper" mentioned in the specification and claims refer not only to direct contact with other components but also to indirect contact with other components. Similarly, terms such as "below" or "beneath" mentioned in the specification and claims refer not only to direct contact with other components but also to indirect contact with other components.

[0049] In addition, terms such as “connected” mentioned in the specification and claims may refer not only to direct connection with other components but also to indirect connection and electrical connection with other components.

[0050] In this specification, unless otherwise specified, the terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art. It is worth noting that, unless otherwise specified in the embodiments of the present disclosure, these terms (such as those defined in commonly used dictionaries) should have the same meanings as commonly understood in the art, and the background of the present disclosure or the content of this specification should not be interpreted in an overly idealistic or formal manner.

[0051] Figure 1 is a schematic diagram of a display device, Figure 2 According to an embodiment of the present disclosure Figure 1 Schematic diagram of a pixel area in a display device. For the convenience of explanation, Figure 1 Only part of the display device 100 is displayed.

[0052] like Figure 1 and Figure 2 As shown, the display device 100 includes: a plurality of fingerprint recognition units S1, S2, a plurality of first sub-pixel areas C1 having a first color, a plurality of second sub-pixel areas C2 having a second color, and a plurality of third sub-pixel areas C3 having a third color. The first color, the second color, and the third color may be different. The first color may be green or red, but is not limited thereto. The second color may be blue, but is not limited thereto. The third color may be a color brighter than the first and second colors, for example, the third color may be white or yellow, but is not limited thereto. According to some embodiments, the fingerprint recognition unit S may be used to receive light for fingerprint recognition.

[0053] When a subject (e.g., a user) places (e.g., touches) a finger on the display device, the recognition area A1 of the display device 100 is defined, and the display device 100 can be in a fingerprint recognition mode. That is, the recognition area A1 is the area where the subject's fingerprint is to be recognized. When the display device is in the fingerprint recognition mode, the subject can touch the recognition area A1, and fingerprint recognition can be detected. Figure 1 The non-recognition area A2 may be an area outside the recognition area A1.

[0054] According to some embodiments, the display device may include a plurality of fourth sub-pixel regions C4 having a fourth color. The first color, the second color, the third color, and the fourth color may be different. Figure 1 and Figure 2 , the display device 100 includes a first pixel area P1 (indicated by a dotted line) and a second pixel area P2 (indicated by a dotted line). The first pixel area P1 and the second pixel area P2 are arranged in the identification area A1. According to some embodiments, the second pixel area P2 may be adjacent to the first pixel area P1, but the present disclosure is not limited thereto. The first pixel area P1 includes a first fingerprint identification unit S1 among a plurality of fingerprint identification units, a first sub-pixel area C1 among a plurality of first sub-pixel areas, a second sub-pixel area C2 among a plurality of second sub-pixel areas, and a fourth sub-pixel area C4 among a plurality of fourth sub-pixel areas. The second pixel area P2 includes a second fingerprint identification unit S2 among a plurality of fingerprint identification units, a first sub-pixel area C1 among a plurality of first sub-pixel areas, a third sub-pixel area C3 among a plurality of third sub-pixel areas, and a fourth sub-pixel area C4 among a plurality of fourth sub-pixel areas.

[0055] The subpixels included in the first pixel region P1 and the subpixels included in the second pixel region P2 may be different. When the display device is in recognition mode, if all subpixels in the first pixel region P1 and all subpixels in the second pixel region P2 are turned on (enabled), the light emitted from the first pixel region P1 and the light emitted from the second pixel region P2 may be different. Therefore, the fingerprint recognition unit S1 in the first pixel region P1 and the fingerprint recognition unit S2 in the second pixel region P2 will receive different light, thereby affecting the recognition accuracy.

[0056] According to some embodiments, when the display device is in recognition mode, not all sub-pixels in the first pixel area P1 and the second pixel area P2 are turned on (activated). For example, when the display device is in fingerprint recognition mode, at least one of the multiple first sub-pixel areas C1 set in the recognition area A1 is activated, and at least one of the multiple second sub-pixel areas C2 and the multiple third sub-pixel areas C3 set in the recognition area A1 is disabled. In this way, the light emitted from different pixel areas can be controlled to be similar or identical. Specifically, the light received by the first fingerprint recognition unit S1 and the light received by the second fingerprint recognition unit S2 can be controlled to be similar or identical. Therefore, the recognition accuracy can be improved.

[0057] refer to Figure 1According to some embodiments, when the display device is in the fingerprint recognition mode, at least one of the plurality of fourth sub-pixel regions C4 disposed in the recognition area may be enabled. According to some embodiments, when the display device is in the fingerprint recognition mode, at least one of the plurality of fourth sub-pixel regions C4 disposed in the recognition area may be disabled.

[0058] Here, activating a sub-pixel region means that the sub-pixel is driven by a driving unit (e.g., a transistor). According to some embodiments, when the display device is an LCD display device, when the sub-pixel region is activated, the sub-pixel region is in a bright state, and when the sub-pixel region is disabled, the sub-pixel region is in a dark state. According to some embodiments, when the display device is an LED or OLED display device, when the sub-pixel region is activated, the diode in the sub-pixel region can emit light, and when the sub-pixel region is disabled, the diode in the sub-pixel region does not emit light.

[0059] Figure 3 is a block diagram of a method for identifying a subject's fingerprint according to an embodiment of the present disclosure.

[0060] In step (S11), provide Figure 1 The display device 100 shown in FIG. The display device 100 may include multiple fingerprint recognition units S1 and S2, multiple first sub-pixel regions C1 having a first color, multiple second sub-pixel regions C2 having a second color, and multiple third sub-pixel regions C3 having a third color, wherein the first color, the second color, and the third color are different. Here, the first color, the second color, and the third color are as defined above and are not further described here.

[0061] In step ( S12 ), when the display device is in a fingerprint recognition mode, a recognition area A1 of the display device is defined by placing (eg, touching) a subject's finger on the display device.

[0062] In step (S13), when the display device is in the fingerprint recognition mode, at least one of the plurality of first sub-pixel regions C1 disposed in the recognition area A1 is activated, and at least one of the plurality of second sub-pixel regions C2 and the plurality of third sub-pixel regions C3 disposed in the recognition area A1 is disabled.

[0063] Figure 4 Schematic diagram of the display device in fingerprint recognition mode. Figure 4 In the example, the activated sub-pixel area is Figure 1 The same pattern is shown, with disabled sub-pixel areas represented by blanks.

[0064] Taking the first pixel P1 and the second pixel P2 as an example, when the display device 100 is in the fingerprint recognition mode, refer to Figure 4, the first sub-pixel area C1 in the first pixel area P1 is activated, the first sub-pixel area C1 in the second pixel area P2 is activated, the second sub-pixel area C2 in the first pixel area P1 is disabled, and the third sub-pixel area C3 in the second pixel area P2 is disabled. According to some embodiments, the fourth sub-pixel area C4 in the first pixel area P1 and the fourth sub-pixel area C4 in the second pixel area P2 are activated. The first sub-pixel area C1 may be green, the second sub-pixel area C2 may be blue, and the fourth sub-pixel area C4 may be red. The third sub-pixel area C3 may be a color brighter than green and blue, such as white. According to some embodiments, in the display device, in the first pixel area P1 and the second pixel area P2, the activated first sub-pixel area C1 and the activated fourth sub-pixel area C4 can be controlled to be activated at the same grayscale or the same brightness. In this way, the light emitted from the first pixel area P1 and the light emitted from the second pixel area P2 can be the same. Therefore, the recognition accuracy of the display device can be improved.

[0065] refer to Figure 4 According to some embodiments, the first sub-pixel area C1 may be green, the second sub-pixel area C2 may be blue, the third sub-pixel area C3 may be white, and the fourth sub-pixel area C4 may be red. When the display device is in fingerprint recognition mode, in the recognition area A1, the green first sub-pixel area C1 in the first pixel area P1 and the second pixel area P2 is activated, the red fourth sub-pixel area C4 in the first pixel area P1 and the second pixel area P2 is activated, and the blue second sub-pixel area C2 in the first pixel area P1 and the white third sub-pixel area C3 in the second pixel area P2 are disabled. Therefore, the light received by the first fingerprint recognition unit S1 in the first pixel area P1 contains red light and green light, and the light received by the second fingerprint recognition unit S2 in the second pixel area P2 contains red light and green light. Therefore, the fingerprint recognition units set in different pixels can receive the same light, that is, light of the same color and / or light of the same brightness. Therefore, the recognition accuracy of the display device can be improved.

[0066] Figure 5 FIG. 1 is a schematic diagram of a display device in fingerprint recognition mode according to another embodiment of the present disclosure. The display device and the fingerprint recognition process of this embodiment are similar to those described above, except for the following differences. Figure 5 In the example, the activated sub-pixel area is Figure 1 The same pattern is shown, and the disabled sub-pixel area is represented by a blank. Figure 5 and Figure 4 The main difference is that in Figure 5 In the embodiment, the fourth sub-pixel C4 in the first pixel P1 and the second pixel P2 is disabled.

[0067] Taking the first pixel P1 and the second pixel P2 as an example, when the display device is in the fingerprint recognition mode, refer to Figure 5 , only the first sub-pixel area C1 is activated. Specifically, the first sub-pixel area C1 in the first pixel area P1 is activated, the first sub-pixel area C1 in the second pixel area P2 is activated, the second sub-pixel area C2 in the first pixel area P1 is disabled, and the third sub-pixel area C3 in the second pixel area P2 is disabled. According to some embodiments, the fourth sub-pixel area C4 in the first pixel area P1 and the fourth sub-pixel area C4 in the second pixel area P2 are disabled. According to some embodiments, the first sub-pixel area C1 can be green, the second sub-pixel area C2 can be blue, and the fourth sub-pixel area C4 can be red. The third sub-pixel area C3 can be a color brighter than green and blue, such as white. According to some embodiments, in the display device, in the first pixel area P1 and the second pixel area P2, the activated first sub-pixel area C1 can be controlled to be activated at the same grayscale or the same brightness. In this way, the light emitted from the first pixel area P1 and the light emitted from the second pixel area P2 can be the same. Therefore, the recognition accuracy of the display device can be improved.

[0068] According to some embodiments, reference Figure 5 , the first sub-pixel area C1 can be red, the second sub-pixel area C2 can be blue, the third sub-pixel area C3 can be white, and the fourth sub-pixel area C4 can be green. When the display device is in fingerprint recognition mode, only the first sub-pixel area C1 (red sub-pixel area) is activated. Specifically, the green fourth sub-pixel area C4 in the first pixel area P1 and the green fourth sub-pixel area C4 in the second pixel area P2 are disabled, the blue second sub-pixel area C2 in the first pixel area P1 is disabled, and the white third sub-pixel area C3 in the second pixel area P2 is disabled. In this way, similar to the above, the light emitted from the first pixel area P1 and the light emitted from the second pixel area P2 can be controlled to be the same. Therefore, the recognition accuracy of the display device can be improved. In one pixel, the arrangement of sub-pixels is not restricted. According to some embodiments, the first pixel region P1 may include a green fourth sub-pixel region C4, a red first sub-pixel region C1, and a blue second sub-pixel region C2 arranged along a first direction, and the second pixel region P2 may include a green fourth sub-pixel region C4, a red first sub-pixel region C1, and a white third sub-pixel region C3 arranged along the first direction. According to some embodiments, the first pixel region P1 may include a red first sub-pixel region C1, a green fourth sub-pixel region C4, and a blue second sub-pixel region C2 arranged along the first direction, and the second pixel region P2 may include a red first sub-pixel region C1, a green fourth sub-pixel region C4, and a white third sub-pixel C3 arranged along the first direction. However, the arrangement of the red, green, blue, and white sub-pixel regions is not limited thereto and may be adjusted as needed.

[0069] When the display device is in the fingerprint recognition mode, the brightness of the first pixel region P1 and the brightness of the second pixel region P2 in the area A1 can be substantially equal. For example, the difference between the brightness of the first pixel region P1 and the brightness of the second pixel region P2 in the area A1 is within ±10%, ±5%, ±3%, ±2%, ±1%, or ±0.5%.

[0070] When the display device is in fingerprint recognition mode, the first sub-pixel regions C1, the second sub-pixel regions C2, the third sub-pixel regions C3, and the fourth sub-pixel regions C4 in the non-recognition area A2 are activated or disabled according to the image to be displayed.

[0071] It should be noted that when the display device is in fingerprint recognition mode, Figure 4 and Figure 5 In the non-recognition area A2, all sub-pixel areas are marked as enabled for ease of illustration to distinguish between the recognition area A1 and the non-recognition area A2. However, in practice, the sub-pixel areas in the non-recognition area A2 should be enabled or disabled separately according to the image to be displayed.

[0072] In the display device of this embodiment, the fourth sub-pixel area C4, the first sub-pixel area C1, and the second sub-pixel area C2 are arranged in one direction, and the fourth sub-pixel area C4, the first sub-pixel area C1, and the third sub-pixel area C3 are also arranged in the same direction. In addition, the first fingerprint recognition unit S1 is arranged adjacent to the first sub-pixel area C1, and the second fingerprint recognition unit S2 is arranged adjacent to the first sub-pixel area C1. However, the arrangement of the first sub-pixel area, the second sub-pixel area, the third sub-pixel area, the fourth sub-pixel area, and the fingerprint recognition unit is not limited to this. For example, in another embodiment of the present disclosure, the fourth sub-pixel area C4, the first sub-pixel area C1, the second sub-pixel area C2, and the first fingerprint recognition unit S1 can be arranged in a 2x2 array, and the fourth sub-pixel area C4, the first sub-pixel area C1, the third sub-pixel area C3, and the second fingerprint recognition unit S2 can also be arranged in a 2x2 array.

[0073] Furthermore, in this embodiment, the ratio of the number of first pixel regions P1 to the number of second pixel regions P2 may be approximately 1:1. However, the present disclosure is not limited thereto. In another embodiment of the present disclosure, the ratio may not be 1:1 and may be adjusted as needed, such as to meet the required brightness of the display device.

[0074] In this embodiment, the fingerprint recognition units (including the first fingerprint recognition unit S1 and the second fingerprint recognition unit S2 ) can be light sensors, visible light sensors, photodiode sensors, transistor sensors, or a combination thereof.

[0075] In some embodiments, the fingerprint sensing unit is more sensitive to green light. In this case, the fingerprint recognition unit can be set close to the green sub-pixel area. For example, in the first pixel area P1, when the first color of the first sub-pixel area C1 is green, the first fingerprint recognition unit S1 can be set closer to the first sub-pixel area C1 than the second sub-pixel area C2. In some embodiments, in the first pixel area P1, the first fingerprint recognition unit S1 can be set closer to the first sub-pixel area C1 than the fourth sub-pixel area C4. In some embodiments, in the second pixel area P2, when the first color of the first sub-pixel area C1 is green, the second fingerprint recognition unit S2 can be set closer to the first sub-pixel area C1 than the fourth sub-pixel area C4, and can also be set closer to the first sub-pixel area C1 than the third sub-pixel area C3. However, the present disclosure is not limited thereto; and the setting of the fingerprint recognition unit can be adjusted as needed, for example, according to the type of fingerprint recognition unit.

[0076] Here, the fact that the first fingerprint recognition unit S1 / the second fingerprint recognition unit S2 is closer to the first sub-pixel area C1 than the second sub-pixel area C2 / the third sub-pixel area C3 / the fourth sub-pixel area C4 can be defined by the center of the first fingerprint recognition unit S1 / the second fingerprint recognition unit S2 and the center of the first sub-pixel area C1 and the second sub-pixel area C2 / the third sub-pixel area C3 / the fourth sub-pixel area C4. For example, in the first pixel P1, the center of the first fingerprint recognition unit S1 is closer to the center of the first sub-pixel area C1 than the centers of the second sub-pixel area C2 and the fourth sub-pixel area C4. Furthermore, in the second pixel P2, the center of the second fingerprint recognition unit S2 is closer to the center of the first sub-pixel area C1 than the centers of the third sub-pixel area C3 and the fourth sub-pixel area C4.

[0077] Figure 6 To follow Figure 2 Schematic cross-sectional view of the display device along line AB is shown.

[0078] The display device of this embodiment includes: a first substrate 11; a first insulating layer 121 disposed on the first substrate 11; a first fingerprint recognition unit S1 disposed on the first insulating layer 121; a second insulating layer 122 disposed on the first insulating layer 121; a first transparent electrode 13 disposed on the second insulating layer 122; a third insulating layer 123 disposed on the first fingerprint recognition unit S1 and the first transparent electrode 13; and a second transparent electrode 14 disposed on the third insulating layer 123.

[0079] In addition, the display device of this embodiment further includes: a second substrate 16; a light shielding layer 18 disposed on the second substrate 16; and a color filter layer 17 disposed on the second substrate 16. The display device of this embodiment further includes: a display medium layer 15 disposed between the first substrate 11 and the second substrate 16.

[0080] Here, the first substrate 11 and the second substrate 16 may be a non-flexible substrate, a flexible substrate, a film or a combination thereof, respectively. The materials of the first substrate 11 and the second substrate 16 may include glass, quartz, silicon chip, sapphire, polycarbonate (PC), polyimide (PI), polypropylene (PP), polyethylene terephthalate (PET), other suitable materials, or a combination thereof, respectively, but the present disclosure is not limited thereto. When the first substrate 11 or the second substrate 16 is a thin film, the film may be a water-blocking film or an encapsulated water-blocking film formed by stacked inorganic-organic-inorganic (IOI) insulating layers. In addition, the first insulating layer 121, the second insulating layer 122 and the third insulating layer 123 respectively include organic materials or inorganic materials, such as silicon oxide, silicon oxynitride, silicon nitride, aluminum oxide, resin, polymer, photoresist, or a combination thereof, but the present disclosure is not limited thereto. The first transparent electrode 13 and the second transparent electrode 14 may respectively include a transparent conductive metal oxide such as ITO (indium tin oxide), IZO (indium zinc oxide), ITZO (indium tin zinc oxide), IGZO (indium gallium zinc oxide), AZO (aluminum zinc oxide), or a combination thereof, but the present disclosure is not limited thereto.

[0081] In this embodiment, the first fingerprint recognition unit S1 is a photodiode for sensing visible light and includes an active layer 23 comprising amorphous silicon. The first fingerprint recognition unit S1 comprises a first electrode 21, a second electrode 22, and an active layer 23 disposed between the first and second electrodes 21 and 22. The active layer 23 comprises an intrinsic semiconductor region 231, an n+ region 232 disposed between the first and second electrodes 21 and 231, and a p+ region 233 disposed between the second electrode 22 and the second semiconductor region 231. The material of the first electrode 21 may include, but is not limited to, copper (Cu), aluminum (Al), molybdenum (Mo), tungsten (W), gold (Au), chromium (Cr), nickel (Ni), platinum (Pt), titanium (Ti), copper alloys, aluminum alloys, molybdenum alloys, tungsten alloys, gold alloys, chromium alloys, nickel alloys, platinum alloys, titanium alloys, other suitable metals, combinations thereof, or other conductive materials with good conductivity or low resistance. Here, the first electrode 21 may have a single-layer or multi-layer structure. In addition, the second electrode 22 may be a transparent electrode, which may include a transparent conductive metal oxide such as ITO, IZO, ITZO, IGZO, AZO, or a combination thereof, but the present disclosure is not limited thereto.

[0082] In this embodiment, the light shielding layer 18 includes a plurality of openings 181, the color filter layer 17 is provided corresponding to one of the openings 181, and the first fingerprint recognition unit S1 is provided corresponding to one of the openings 181. Specifically, the first fingerprint recognition unit S1 is exposed by one of the openings 181. However, the present disclosure is not limited thereto, as long as the active layer 23 of the first fingerprint recognition unit S1 can be exposed from the opening 181 to receive light from the second substrate 16. In another embodiment of the present disclosure, the first fingerprint recognition unit S1 can be provided corresponding to two or more of the openings 181. In yet another embodiment of the present disclosure, two or more first fingerprint recognition units S1 can be provided corresponding to one of the openings 181.

[0083] In this embodiment, if Figure 1 The structure of the second fingerprint recognition unit S2 is similar to that of the first fingerprint recognition unit S1, and will not be described in detail here. Figure 6 The LCD device shown is an example of a display device of the present disclosure, but the present disclosure is not limited thereto. Although not shown in the figure, the present disclosure can also be applied to OLED display devices, micro LED display devices, sub-millimeter LED display devices, or quantum dot LED (QDLED) display devices.

[0084] In the display device of this embodiment, reference Figure 1 , the first fingerprint recognition unit S1 is set in the first pixel area P1, and the second fingerprint recognition unit S2 is set in the second pixel area P2. Therefore, the aperture ratio of the first pixel area P1 and the second pixel area P2 will be reduced, resulting in insufficient brightness of the display device. Therefore, the second sub-pixel area C2 with a second color in the second pixel area P2 can be replaced with a third sub-pixel area C3 with a third color, where the third color is brighter than the second color, to increase the brightness of the display device without increasing the power consumption of the display device. However, if all sub-pixels in the first pixel area P1 and the second pixel area P2 are activated in the fingerprint recognition mode, the light received by the first fingerprint recognition unit S1 and the light received by the second fingerprint recognition unit S2 are different because the second sub-pixel area C2 in the first pixel area P1 and the third sub-pixel area C3 in the second pixel area P2 have different colors. This light difference may cause the light received by the first fingerprint recognition unit S1 or the second fingerprint recognition unit S2 to be misinterpreted as noise, resulting in poor fingerprint recognition.

[0085] In the fingerprint recognition method of this embodiment, the second sub-pixel region C2 in the first pixel region P1 and the third sub-pixel region C3 in the second pixel region P2 can be disabled in fingerprint recognition mode, thereby reducing the light difference caused by the light emitted by the second sub-pixel region C2 and the third sub-pixel region C3. Therefore, the accuracy of fingerprint recognition can be improved.

[0086] In this embodiment, the display device may be a display device, a touch display device, a curved display device or a free shape display device, but the present disclosure is not limited thereto. The display device of the present disclosure may be a bendable or flexible display device. The display device may include, for example, a spliced display device, but the present disclosure is not limited thereto. The display device of the present disclosure may be a combination of the above devices, but the present disclosure is not limited thereto. In addition, the shape of the display device of the present disclosure is not particularly limited, and may be a rectangle, a circle, a polygon, a shape with curved edges or other suitable shapes, but the present disclosure is not limited thereto. The display device of the present disclosure may include a drive system, a control system, a light source system, a shelving system or other peripheral systems to support the display device or the spliced display device.

[0087] In this embodiment, the display device may include a display layer, which may include liquid crystals (LCs), organic light-emitting diodes (OLEDs), quantum dots (QDs), fluorescent materials, phosphorescent materials, light-emitting diodes (LEDs), or other display media, but the present disclosure is not limited thereto. Depending on their size, LEDs may include micro LEDs (micro light-emitting diodes), sub-millimeter LEDs (mini LEDs), or quantum dot (QD) LEDs, such as QLEDs or QDLEDs.

[0088] In summary, in the fingerprint recognition method of the present disclosure, when the display device is in the fingerprint recognition mode and the subject's finger is placed on or touching the recognition area of the display device, at least one first sub-pixel area is enabled, and at least one of the second sub-pixel area and the third sub-pixel area is disabled. According to some embodiments, in the recognition area, the green sub-pixel area is enabled, and the blue sub-pixel and the white sub-pixel are disabled. According to some embodiments, in the recognition area, the green sub-pixels in the first pixel area and the second pixel area are enabled, and the blue sub-pixel area in the first pixel area and the white sub-pixel area in the second pixel area are disabled. Therefore, according to some embodiments, the light received by the first fingerprint recognition unit in the first pixel area and the light received by the second fingerprint recognition unit in the second pixel area can be controlled to be similar or identical. Therefore, according to some embodiments, the accuracy of fingerprint recognition of the display device can be improved.

[0089] Although the present disclosure has been explained through the embodiments, it should be understood that many other possible modifications and variations can be made without departing from the spirit and scope of the present disclosure as hereinafter claimed.

Claims

1. A method for identifying a subject's fingerprint, characterized in that: The following steps are involved: A display device is provided, wherein the display device includes: a plurality of fingerprint recognition units, a plurality of first sub-pixel regions having a first color, a plurality of second sub-pixel regions having a second color, a plurality of third sub-pixel regions having a third color, and a plurality of fourth sub-pixel regions having a fourth color, wherein the first color, the second color, the third color, and the fourth color are different; When the display device is in a fingerprint recognition mode, a recognition area of the display device is defined by placing a finger of the subject on the display device; The display device includes a first pixel region and a second pixel region, each of which is disposed in the identification area and adjacent to the second pixel region along a first direction; The first pixel region includes a first fingerprint recognition unit among the fingerprint recognition units, a first sub-pixel region among the first sub-pixel regions, a second sub-pixel region among the second sub-pixel regions, and a fourth sub-pixel region among the fourth sub-pixel regions; The second pixel region includes a second fingerprint recognition unit among the fingerprint recognition units, a first sub-pixel region among the first sub-pixel regions, a third sub-pixel region among the third sub-pixel regions, and a fourth sub-pixel region among the fourth sub-pixel regions; When the display device is in the fingerprint recognition mode, the first sub-pixel area and the fourth sub-pixel area of the first pixel area are activated, the first sub-pixel area and the fourth sub-pixel area of the second pixel area are activated, the second sub-pixel area of the first pixel area is disabled, and the three sub-pixel areas of the second pixel area are disabled.

2. The method according to claim 1, wherein The second color is blue.

3. The method according to claim 2, wherein The third color is white.

4. The method according to claim 1, wherein The display device comprises: a first substrate, wherein the first fingerprint recognition unit is disposed on the first substrate; a second substrate; a light shielding layer disposed on the second substrate, the light shielding layer comprising a first opening and a second opening; a color filter layer disposed on the second substrate, with at least a portion of the color filter layer disposed within the first opening of the light shielding layer; wherein at least a portion of the first fingerprint recognition unit is disposed corresponding to the second opening of the light shielding layer; and A display medium layer is disposed between the first substrate and the second substrate, and a portion of the display medium layer is disposed between the first fingerprint identification unit and the second substrate.

5. The method according to claim 1, wherein The display device includes a third pixel area disposed in the identification area. The second pixel region is adjacently arranged between the first pixel region and the third pixel region along the first direction, The third pixel region includes a third fingerprint recognition unit among the fingerprint recognition units, a first sub-pixel region among the first sub-pixel regions, a second sub-pixel region among the second sub-pixel regions, and a fourth sub-pixel region among the fourth sub-pixel regions. When the display device is in the fingerprint recognition mode, the method includes activating the first sub-pixel region and the fourth sub-pixel region in the third pixel region, and disabling the second sub-pixel region in the third pixel region.

6. The method according to claim 1, wherein When the display device is in the fingerprint recognition mode, the method includes activating the fourth sub-pixel region in the first pixel region and activating the fourth sub-pixel region in the second pixel region with the same brightness.

7. The method according to claim 6, wherein When the display device is in the fingerprint recognition mode, the method includes activating the first sub-pixel region in the first pixel region and activating the first sub-pixel region in the second pixel region with the same brightness.

8. The method according to claim 2, wherein The first color is green.

9. The method according to claim 2, wherein The first color is red.

10. The method according to claim 1, wherein The display device includes a non-recognition area outside the recognition area, and the method includes: When the display device is in the fingerprint recognition mode, the first sub-pixel regions, the second sub-pixel regions, and the third sub-pixel regions disposed in the non-recognition area are respectively activated or disabled according to an image to be displayed.

Images