CN211857492U - Fingerprint device and display module under screen - Google Patents
Fingerprint device and display module under screen Download PDFInfo
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- CN211857492U CN211857492U CN202020596785.4U CN202020596785U CN211857492U CN 211857492 U CN211857492 U CN 211857492U CN 202020596785 U CN202020596785 U CN 202020596785U CN 211857492 U CN211857492 U CN 211857492U
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/1382—Detecting the live character of the finger, i.e. distinguishing from a fake or cadaver finger
- G06V40/1394—Detecting the live character of the finger, i.e. distinguishing from a fake or cadaver finger using acquisition arrangements
Abstract
The utility model provides a fingerprint device and display module assembly under screen. The under-screen fingerprint device comprises a substrate and a photosensitive sensing array arranged on the substrate, wherein the photosensitive sensing array comprises a plurality of photosensitive pixels; a through hole structure and a color film layer are arranged above the photosensitive sensing array; the through hole structure is provided with a plurality of first through holes, the color film layer comprises a plurality of filter films, and each filter film allows light of a set waveband to penetrate through; the area of the through hole structure corresponding to at least part of photosensitive pixels of the photosensitive sensor array is a first through hole, and the area of the color film layer corresponding to at least part of photosensitive pixels is a filter film; and at least part of the photosensitive pixels are used for receiving the spectrum information which is emitted downwards from the display screen and passes through the corresponding filter coating and the first through hole. The fingerprint device under the screen can effectively realize the fingerprint detection of the living body.
Description
Technical Field
The utility model belongs to the technical field of fingerprint identification and demonstration and specifically relates to a fingerprint device under screen is related to and include the display module assembly of fingerprint device under this screen.
Background
Based on the pursuit of a full screen, the under-screen fingerprint technology has been widely applied to terminal electronic devices such as mobile phones, and along with the development of the technology, the accuracy of fingerprint identification is higher and higher.
However, in the prior art, the under-screen fingerprint recognition device used in the terminal electronic device such as the mobile phone cannot well detect whether the fingerprint to be recognized placed on the screen comes from a finger of a real person or from a carrier carrying fingerprint texture information, such as a "fingerprint film". Therefore, the method has a great potential safety hazard, namely, the fingerprint texture information of a certain person can be obtained and formed on carriers such as a fingerprint film, and the fingerprint coded lock of the terminal electronic equipment such as a mobile phone of the person can be cracked.
Therefore, there is a need for an under-screen fingerprint device with a live fingerprint identification function.
SUMMERY OF THE UTILITY MODEL
A first object of the utility model is to provide a fingerprint device under screen, it can improve among the prior art because can't confirm carry out fingerprint identification be true finger, still the problem in the aspect of the potential safety hazard that false fingerprint texture information carriers such as "fingerprint membrane" lead to.
The utility model provides a fingerprint device under screen, it includes the substrate and sets up the photosensitive sensing array on the substrate, photosensitive sensing array includes a plurality of photosensitive pixels; a through hole structure and a color film layer are arranged above the photosensitive sensing array; the through hole structure is provided with a plurality of first through holes, the color film layer comprises a plurality of filter films, and each filter film allows light of a set waveband to penetrate through; the area of the through hole structure corresponding to at least part of photosensitive pixels of the photosensitive sensor array is a first through hole, and the area of the color film layer corresponding to at least part of photosensitive pixels is a filter film; and at least part of the photosensitive pixels are used for receiving the spectrum information which is emitted downwards from the display screen and passes through the corresponding filter coating and the first through hole.
Optionally, the plurality of filters includes a visible light filter and/or an infrared filter.
Optionally, the plurality of filters include a red visible light filter, a green visible light filter, and a blue visible light filter.
Optionally, the fingerprint device under the screen includes at least one light filling unit, the light filling unit sets up the marginal area of substrate for to the regional emission light of fingerprint identification on the display screen, the light that every light filling unit launches can see through at least one the filter coating.
Optionally, the underscreen fingerprint device further comprises a microlens layer; the micro-lens layer is arranged above the through hole structure, and the color film layer is arranged between the micro-lens layer and the through hole structure.
Optionally, the through hole structure includes a transparent insulating layer and a light blocking layer, and a plurality of first through holes are disposed on the light blocking layer at positions corresponding to the photosensitive pixels and the filter film.
Optionally, the number of the transparent insulating layers and the light blocking layers is at least two, and the transparent insulating layers and the light blocking layers are sequentially arranged at intervals.
Optionally, the aperture of the first through hole corresponding to the same photosensitive pixel on the plurality of light blocking layers decreases progressively along the direction approaching the photosensitive sensing array.
Optionally, the color film layer is disposed above the through hole structure; or the color film layer is arranged between the light-blocking layer and the photosensitive sensing array; or when the number of the light-blocking layers is more than two, the color film layer is arranged between any two adjacent light-blocking layers.
Optionally, the via structure includes an infrared filter layer; when the color film layer comprises the infrared light filter film, the position, corresponding to the infrared light filter film, of the infrared filter layer is provided with an opening.
Optionally, a second through hole is further formed in the light-blocking layer, at least one light-blocking layer is further disposed above the light-blocking layer provided with the second through hole, and a position, corresponding to the second through hole, on the light-blocking layer above the light-blocking layer is opaque.
Optionally, the light blocking layer nearest to the photosensitive sensing array is provided with the second through hole.
Optionally, the color film layer is provided with a plurality of filter film groups, and each filter film group is provided with a plurality of similar filter films which are adjacently distributed or continuously distributed; the plurality of filter film groups are arranged at intervals in an array, or in a two-dimensional code, or in a shape like a Chinese character 'mi', a cross, a square, or a square.
Optionally, the wavelength band of light allowed to pass through each filter on the color film layer is the same as the wavelength band of light emitted by the pixel corresponding to the filter on the display screen.
A second object of the present invention is to provide a display module, which comprises a self-luminous display screen and a fingerprint device under the screen, wherein the fingerprint device is disposed under the screen below the self-luminous display screen.
Optionally, the self-luminous display screen includes an OLED display screen or a Micro LED display screen.
The utility model discloses following beneficial effect has:
the utility model provides a fingerprint device under screen, it includes photosensitive sensor array and the through-hole structure, the various rete that are located photosensitive sensor array top, and the region that corresponds with at least some photosensitive pixels of photosensitive sensor array on the through-hole structure is first through-hole, and the region that corresponds with at least some photosensitive pixels on the various rete is the filter coating; when fingerprint identification is carried out, because the absorption degrees of the spectrum of a real finger and other fake fingerprint texture information carriers are different, light emitted to the lower part from the display screen can pass through the filter coating on the color film layer and the first through hole on the through hole structure and be received by the photosensitive pixels of the photosensitive sensor array, and the received spectrum information is processed by the photosensitive pixels of the photosensitive sensor array, so that whether the fingerprint identification area of the display screen is a real finger of a user or the fake fingerprint texture information carriers such as a fingerprint film can be identified, and the function of living body fingerprint identification is realized.
The utility model provides a display module assembly, it includes fingerprint device under the above-mentioned screen, and spectrum information that can be received according to photosensitive sensing array's photosensitive pixel equally, it is user's true finger to discern that to be located the fingerprint identification region of display screen, still false fingerprint texture information carriers such as "fingerprint membrane" to living body fingerprint identification's function has been realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of an underscreen fingerprint device according to embodiment 1 of the present invention when mounted on a display screen;
fig. 2 is a schematic structural view of an underscreen fingerprint device according to embodiment 1 of the present invention;
FIG. 3 is a schematic top view of the color film layer;
fig. 4 is a schematic structural diagram of a modified embodiment of embodiment 1 of the present invention;
fig. 5 is a schematic structural diagram of embodiment 3 of the present invention.
Icon: 1-an underscreen fingerprint device; 2-a display screen; 10-a substrate; 11-a photosensitive sensing array; 12-a via structure; 13-a color film layer; 14-a microlens; 120-a first via; 121-transparent insulating layer; 122-a light blocking layer; 123-an infrared filter layer; 15-a light supplement unit; 124-second via.
Detailed Description
The embodiments of the technical solutions provided in the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are not all embodiments of the technical solutions provided in the present invention. All other embodiments, which can be derived by a person skilled in the art from the following description without inventive step, are intended to be within the scope of the invention as claimed.
The utility model provides a fingerprint device under screen, in its embodiment, as shown in FIG. 1 and FIG. 2, fingerprint device 1 sets up in the below of display screen 2 under the screen, and this display screen 2 specifically is self-luminous display screen, for example OLED display screen or micro LED display screen. The underscreen fingerprint device 1 comprises a substrate 10 and a photosensitive sensing array 11 disposed on the substrate 10, the photosensitive sensing array 11 comprising a plurality of photosensitive pixels. A through hole structure 12, a color film layer 13 and a micro lens 14 are arranged above the photosensitive sensing array 11. The through hole structure 12 has a plurality of first through holes 120, and the color film layer 13 includes a plurality of filter regions, each having a filter, each allowing light of a predetermined wavelength band to pass through. Specifically, the filter films in different filter regions may be the same or different filter films, i.e., the wavelength bands of light allowed to transmit are the same or different; in general, for a plurality of filtering regions, at least some of the filtering regions are the same type of filtering film, i.e. the wavelength bands of the light allowed to pass through are the same. The area of the through hole structure 12 corresponding to at least part of the photosensitive pixels of the photosensitive sensing array 11 is a first through hole 120, and the area of the color film layer 13 corresponding to at least part of the photosensitive pixels is a filter film; and the at least part of the photosensitive pixels are used for receiving the spectrum information which is emitted downwards from the display screen 2, passes through the corresponding filter coating and the first through holes 120 and reaches the photosensitive pixels.
In the using process, when a finger of a user or a fake fingerprint texture information carrier such as a "fingerprint film" touches a fingerprint identification area of the display screen 2, the display screen 2 emits light towards the direction of the finger of the user, and the fake fingerprint texture information carrier such as the finger of the user or the "fingerprint film" is reflected downwards (for convenience of description, the direction of the under-screen fingerprint device 1 relative to the display screen 2 is defined as below, and the opposite direction is defined as above), and then the light is emitted towards the under-screen fingerprint device 1, passes through the light path processing at the micro lens 14, continues to spread downwards, passes through the filter film on the color film layer 13, and the first through hole 120, and reaches a corresponding photosensitive pixel on the photosensitive sensing array 11. The absorption of the spectrum of the false fingerprint texture information carriers such as the real finger and the fingerprint film of the user is different, namely, the spectrum information of the same light is different after the same light is reflected by the real finger and after the same light is reflected by the false fingerprint texture information carriers such as the fingerprint film. Therefore, in the present embodiment, the photosensitive pixels of the photosensitive sensor array 11 process the received spectral information, and can accurately determine whether the fingerprint identification area of the display screen 2 is a real finger of the user or a false fingerprint texture information carrier such as a "fingerprint film", that is, a living fingerprint detection function is implemented.
Example 1 of an underscreen fingerprint device
In this embodiment, as shown in fig. 2, the via structure 12 includes a transparent insulating layer 121 and a light blocking layer 122, and the number of the transparent insulating layer 121 and the light blocking layer 122 is multiple, and the two layers are sequentially disposed at intervals. Specifically, the number of the transparent insulating layers 121 and the number of the light-blocking layers 122 are two, the light-blocking layers 122 are arranged below, and the transparent insulating layers 121 are arranged above in sequence; the color film layer 13 is disposed on the uppermost transparent insulating layer 121.
As shown in fig. 2, a first through hole 120 is disposed on a region of the light blocking layer 122 corresponding to a photosensitive pixel of the photosensitive sensing array 11. Generally, in the preparation of the via structure 12, semiconductor processes such as deposition and etching are generally adopted; after the first via 120 is formed on the light-blocking layer 122 by etching or the like, when a next layer of processing is performed, the material of the transparent insulating layer 121 is filled in the first via 120. However, in fig. 2 of the present embodiment, the first through hole 120 is shown in blank for the sake of simplicity and clarity.
During fingerprint identification, after passing through the color film layer 13, light emitted from the top to the bottom sequentially passes through the first through hole 120 of each light-blocking layer 122 and reaches the photosensitive pixels of the photosensitive sensor array 11 located below.
Furthermore, preferably, the aperture of the first through hole 120 corresponding to the same photosensitive pixel on the plurality of light blocking layers 122 decreases in the direction approaching the photosensitive sensing array 11. With such an arrangement, the aperture of the first through hole of the light blocking layer 122 located above is large and can be significantly larger than the size of the photosensitive pixel, so that more light can be introduced into the photosensitive pixel of the photosensitive sensing array 11, and the photosensitive pixel receives more spectral information. Generally, the first through hole 120 on the uppermost light-blocking layer 122 has a pore size of not more than 10 micrometers, and the first through hole 120 on the lowermost light-blocking layer 122 has a pore size of 2 to 3 micrometers.
In this embodiment, each filter on the color film layer 13 allows the same wavelength band of light to pass through as the wavelength band of light emitted by the pixel on the display 2 corresponding to the filter. It can be understood that, light emitted by a certain pixel of the display screen 2 will reach the filter film of the corresponding filter region on the color film layer 13 when being reflected and then emitted downward, and since the wavelength band of the emitted light is the same as the wavelength band of the light allowed to be transmitted by the filter film, more light will be transmitted through the filter film, so that the photosensitive pixels of the photosensitive sensor array 11 can perform spectrum identification processing better and more accurately, which is helpful for improving accuracy and success rate of living fingerprint detection. Specifically, in this embodiment, the wavelength bands of light allowed to pass through by the filter films in the multiple filter regions of the color film layer 13 include a red visible light wavelength band, a green visible light wavelength band, and a blue visible light wavelength band; the three filter films only allow red visible light, green visible light and blue visible light to transmit respectively. With such an arrangement, the requirement of corresponding the filter film of the color film layer 13 to the pixels on the display screen 2 can be better satisfied, and only the filter film of a certain filter region on the color film layer 13 needs to be corresponding to the pixels on the display screen 2 emitting light of the same wavelength band in the approximately vertical direction.
In this embodiment, the color film layer 13 is divided into a plurality of repeating regions, each repeating region is provided with a plurality of filtering regions, and each filtering region is provided with a group of filtering films; the color of each group of filter films is the same, and the number of the filter films is a plurality and the filter films are arranged adjacently; the different groups of filter films are arranged at intervals; this makes the design and construction simpler.
For example, the color film layer 13 is divided into 6 rows in the transverse direction and 4 columns in the longitudinal direction, forming 24 repeating regions. Each of the repeating regions can be as shown in fig. 3, wherein the region labeled R is a red visible light filter, the region labeled G is a green visible light filter, the region labeled B is a blue visible light filter, and the blank squares represent transparent regions on the color film layer 13. Thus, the entire color film layer 13 has a plurality of filter groups, each filter group includes a plurality of similar filters distributed adjacently, and the similar filters are arranged adjacently to each other according to 4 × 4; the plurality of filter film sets are arranged at intervals in an array on the whole color film layer 13.
(II) modified embodiment of embodiment 1 described above
On the basis of the above embodiment 1, as a modification, the wavelength band of the light allowed to pass through by the filter film of each filter region of the color film layer 13 may include visible light of other wavelength bands such as a yellow visible light wavelength band, a cyan visible light wavelength band, and the like, with or without including a red visible light wavelength band, a green visible light wavelength band, and a blue visible light wavelength band. It can be understood that, within a certain range, the more kinds of the filter films included in the color film layer 13, the more abundant the spectrum information received by the photosensitive sensing array 11, and the more accurate the detection of the live fingerprint.
On the basis of the above embodiment 1, as a further modification, the wavelength band of the light that the filter film of each filter region of the color film layer 13 allows to transmit may further include an infrared wavelength band. As shown in fig. 4, the via structure 12 includes an infrared filter layer 123, and the infrared filter layer 123 may be disposed, for example, at a position between the light blocking layer 122 nearest to the substrate 10 and the transparent insulating layer 121. In the present embodiment having the filter film allowing infrared light to pass through, an opening is formed in the infrared filter layer 123 at a position corresponding to the filter film allowing infrared light to pass through, so as to allow infrared light to be received by the photosensitive pixels of the photosensitive sensor array 11 below through the opening, and the infrared filter layer 123 is used for filtering infrared light at a position corresponding to another type of filter film.
In the above two modified embodiments, the filter film in each filter region of the color film layer 13 allows more than two wavelength bands of light to pass through. However, the light allowed to pass through the filter film in each filter region may also be in one wavelength band, in this case, the filter film is disposed in a partial region on the color film layer 13, and the filter film is not disposed in other regions; the light sensing pixels on the light sensing array 11 are compared according to the spectrum information obtained from the two partial areas, so that the detection of the living fingerprint can be realized.
On the basis of embodiment 1, as a further modification, in practice, since the photosensitive pixels can only receive collimated light information, and the area of the photosensitive pixels is small, there is a possibility that the photosensitive pixels are blocked by a display driving circuit of the display screen, and therefore, some of the photosensitive pixels cannot receive light emitted from the display screen. For the part of photosensitive pixels, no filter film may be disposed in the corresponding region on the filter region, which is shown in the drawing like fig. 3, that is, in the filter region including 4 × 4 squares, a part of the squares is transparent and does not play a role of filtering light. In other words, each of the filter regions includes a plurality of the same type of filter films, and the plurality of filter films are distributed at intervals.
In addition, in embodiment 1, as shown in fig. 3, the filter films are disposed in 4 × 4 squares of each filter film group, but the plurality of the same type of filter films are disposed in a manner of being adjacent to each other with gaps therebetween, but in practice, the plurality of the same type of filter films of each filter film group may not have any gaps therebetween, so that the plurality of filter films in each filter film group are continuously disposed.
On the basis of the above embodiment 1, as a fourth modification, the number of the light-blocking layers 122 is not limited to 2 layers, and it may be at least one layer; 3 light-blocking layers can be further included; of course, more layers of light blocking layer 122 may be present. Generally, the number of light blocking layers 122 is within 10 layers; when there is more light-blocking layer 122, a significant increase in the thickness of the underscreen fingerprint device 1 is brought about, which would otherwise have an adverse effect.
On the basis of the above embodiment 1, as a fifth modification, the plurality of filter regions of the color film layer 13 may be distributed in a discrete state other than the array interval distribution, or may be distributed in a continuous manner. Specifically, the plurality of light-filtering regions distributed in a discrete state may be arranged in a two-dimensional code, or in a shape of a Chinese character 'mi', a cross, a square, or a square at intervals. The plurality of continuously distributed filter areas are arranged in a shape like a Chinese character 'mi', a cross, a Chinese character 'hui' or a square.
On the basis of the above embodiment 1, as a sixth modification, the position where the color film layer 13 is disposed is not limited to be above the via structure 12, and in other modification embodiments, the color film layer 13 may be disposed between the light blocking layer 122 and the photosensitive sensing array 11; alternatively, when the number of the light-blocking layers 122 is two or more, the color film layer 13 may be disposed between any two adjacent light-blocking layers 122.
Example 2 of an underscreen fingerprint device
As a further improvement of the above embodiment 1, on the basis of the above embodiment 1 and its modified embodiments, the underscreen fingerprint device 1 includes at least one light supplement unit 15, where the light supplement unit 15 is disposed at an edge region of the substrate 10 and is configured to emit light to a fingerprint identification region on the display screen 2, and the light emitted by each light supplement unit 15 can pass through at least one of the filter films. For example, the light supplement unit 15 emits white light, and the white light can pass through various filter films; the light supplement unit 15 emits red light, and the red light can penetrate through the filter film allowing the red visible light band to penetrate. By arranging the light supplementing unit 15, on one hand, the brightness of light emitted to the fingerprint identification area of the display screen 2 can be enhanced, and the problem that the success rate of detecting living fingerprints is reduced due to the fact that spectrum information received by photosensitive pixels of the photosensitive sensing array 11 is less because of insufficient light provided by the display screen 2 in a dark light environment is solved, at the moment, the light supplementing unit 15 emits light to the fingerprint identification area on the display screen 2 and can provide enough light, so that the spectrum information emitted from the upper part to the lower part and received by the photosensitive pixels of the photosensitive sensing array 11 is enough, and the success rate of detecting the living fingerprints can be improved; on the other hand, because the wavelength range of light that the display screen 2 can produce is narrower, through setting up the light filling unit 15, can also expand on the spectral range to make the spectral range that the photosensitive pixel of photosensitive sensing array 11 receives wider, can also increase photosensitive sensing array 11 and detect the accuracy of living body fingerprint like this.
Specifically, in this embodiment, the number of the light supplement units 15 is one or more. When the light supplement units 15 are provided in plural numbers, the light supplement units 15 may be disposed at any position as required, for example, uniformly around the substrate 10, or disposed at one side of the substrate 10.
The light supplement unit 15 may be a white light LED, a monochromatic light LED, or an infrared light LED. For example, a white LED may increase the intensity of light while extending the width of the spectrum that can be received by the photosensitive pixels of photosensitive sensing array 11; when the color film layer 13 is provided with a filter film allowing the yellow visible light wave band and the cyan visible light wave band to penetrate, monochromatic light LEDs emitting light of corresponding wave bands such as yellow, cyan and the like can be further arranged; when the color film layer 13 is provided with a filter film allowing infrared light to pass through, an infrared light LED may be provided as the light supplement unit 15. When the number of the light supplement units 15 is plural, the type of each light supplement unit 15 may be any one of the above white light LED, monochromatic light LED, or infrared light LED, as required, and meanwhile, the setting position of each light supplement unit 15 is set as required.
Example 3 of an (IV) underscreen fingerprint device
As a further improvement of the above embodiments 1 and 2, in this embodiment, on the basis of the above embodiment 1 and its modified embodiments and 2, the light-blocking layer 122 is further provided with a second through hole 124, and at least one light-blocking layer 122 is further provided above the light-blocking layer 122 provided with the second through hole 124, and the light-blocking layer 122 above the light-blocking layer is opaque at a position corresponding to the second through hole 124. In one aspect, the second through hole 124 may be disposed such that light which is not directly emitted from the top downward but emitted obliquely downward can be emitted from the second through hole 124 to the lower layer after multiple reflections. On the other hand, since the aperture of the first through hole 120 of the light-blocking layers 122 decreases in the direction approaching the photosensitive sensor array 11, when light passes through the first through hole 120, a part of the light inevitably irradiates a protruding part of the light-blocking layer 122 above a certain light-blocking layer 122, and the part of the light can be reflected and then emitted downward through the second through hole 124.
As shown in fig. 5, if the light-blocking layer 122 of the second through hole 124 is the lowest light-blocking layer 122, the light passing through the second through hole 124 directly emits to the photosensitive pixels of the photosensitive sensor array 11 located below, and is received by the photosensitive pixels of the photosensitive sensor array 11 for processing. If the light-blocking layer 122 where the second through hole 124 is located is not the lowest light-blocking layer 122, the light passing through the second through hole 124 passes through the first through hole 120 on the lower light-blocking layer 122, and is finally received by the photosensitive pixels of the photosensitive sensing array 11 for processing.
To sum up, the utility model provides a fingerprint device 1 under screen, it includes photosensitive sensor array 11 and is located photosensitive sensor array 11 top through-hole structure 12, various rete 13, and the region that corresponds with at least some photosensitive pixels of photosensitive sensor array 11 on through-hole structure 12 is first through-hole 120, the region that corresponds with at least some photosensitive pixels on various rete 13 is the filter coating; when fingerprint identification is carried out, because the absorption degrees of the spectrum of a real finger and other fake fingerprint texture information carriers are different, light emitted to the lower part from the display screen 2 can pass through the filter coating on the color film layer 13 and the first through hole 120 on the through hole structure 12 and be received by the photosensitive pixel of the photosensitive sensing array 11, and the received spectrum information is processed by the photosensitive pixel of the photosensitive sensing array 11, so that whether the real finger of a user or the fake fingerprint texture information carriers such as a fingerprint film is positioned in the fingerprint identification area of the display screen 2 can be identified, and the function of living body fingerprint identification is realized.
The utility model also provides a display module assembly, in its embodiment, display module assembly includes the fingerprint device under the screen that provides in self-luminous display screen and the above-mentioned embodiment, fingerprint device sets up under the screen the below of self-luminous display screen.
Specifically, the self-luminous display screen comprises an OLED display screen or a MicroLED display screen.
To sum up, the utility model provides a display module assembly, it includes the screen fingerprint device under the above-mentioned embodiment, spectrum information that photosensitive sensor array's photosensitive pixel received equally can be based on, and it is regional that the fingerprint identification who is located the display screen is user's true finger, still false fingerprint texture information carrier such as "fingerprint membrane" to living body fingerprint identification's function has been realized.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (16)
1. An underscreen fingerprint device is characterized by comprising a substrate and a photosensitive sensing array arranged on the substrate, wherein the photosensitive sensing array comprises a plurality of photosensitive pixels; a through hole structure and a color film layer are arranged above the photosensitive sensing array;
the through hole structure is provided with a plurality of first through holes, the color film layer comprises a plurality of filter films, and each filter film allows light of a set waveband to penetrate through;
the area of the through hole structure corresponding to at least part of photosensitive pixels of the photosensitive sensor array is a first through hole, and the area of the color film layer corresponding to at least part of photosensitive pixels is a filter film; and at least part of the photosensitive pixels are used for receiving the spectrum information which is emitted downwards from the display screen and passes through the corresponding filter coating and the first through hole.
2. The underscreen fingerprint device of claim 1, wherein the plurality of filters comprise visible light filters and/or infrared light filters.
3. The underscreen fingerprint device of claim 2, wherein the plurality of filters comprise a red visible filter, a green visible filter, and a blue visible filter.
4. The underscreen fingerprint device of claim 1, comprising at least one light supplementing unit, wherein the light supplementing unit is disposed at an edge region of the substrate and configured to emit light to a fingerprint identification region on a display screen, and the light emitted by each light supplementing unit can penetrate through at least one of the filter films.
5. The underscreen fingerprint device of claim 1, further comprising a microlens layer;
the micro-lens layer is arranged above the through hole structure, and the color film layer is arranged between the micro-lens layer and the through hole structure.
6. The device according to claim 1, wherein the through hole structure comprises a transparent insulating layer and a light blocking layer, and a plurality of first through holes are arranged on the light blocking layer at positions corresponding to the photosensitive pixels and the light filter film.
7. The device of claim 6, wherein the number of the transparent insulating layers and the light-blocking layers is at least two, and the transparent insulating layers and the light-blocking layers are arranged at intervals in sequence.
8. The device according to claim 7, wherein the aperture of the first through hole corresponding to the same photosensitive pixel on the plurality of light blocking layers decreases in a direction approaching the photosensitive sensor array.
9. The device according to any one of claims 6 to 8, wherein the color film layer is disposed above the through hole structure; or
The color film layer is arranged between the light blocking layer and the photosensitive sensing array; or
When the number of the light-blocking layers is more than two, the color film layer is arranged between any two adjacent light-blocking layers.
10. The device according to any one of claims 6 to 8, wherein the via structure comprises an infrared filter layer;
when the color film layer comprises the infrared light filter film, the position, corresponding to the infrared light filter film, of the infrared filter layer is provided with an opening.
11. The device according to claim 7 or 8, wherein a second through hole is further formed in the light-blocking layer, and at least one light-blocking layer is further disposed above the light-blocking layer on which the second through hole is formed, and light is not transmitted at a position corresponding to the second through hole on the light-blocking layer above.
12. The underscreen fingerprint device of claim 11, wherein the second via is disposed on a light blocking layer nearest the photosensitive sensing array.
13. The underscreen fingerprint device of claim 1, wherein the color film layer is provided with a plurality of filter film groups, each filter film group is provided with a plurality of same filter films which are adjacently distributed or continuously distributed;
the plurality of filter film groups are arranged at intervals in an array, or in a two-dimensional code, or in a shape like a Chinese character 'mi', a cross, a square, or a square.
14. The underscreen fingerprint device of claim 1, wherein each filter on the color film layer allows transmission of light in the same wavelength band as light emitted by a pixel on the display screen corresponding to the filter.
15. A display module comprising a self-luminous display and the under-screen fingerprint device of any one of claims 1 to 14, wherein the under-screen fingerprint device is disposed below the self-luminous display.
16. The display module of claim 15, wherein the self-luminous display comprises an OLED display or a micro led display.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020411625 | 2020-03-26 | ||
| CN2020204116258 | 2020-03-26 |
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| CN211857492U true CN211857492U (en) | 2020-11-03 |
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| CN202010283018.2A Active CN111626100B (en) | 2020-03-26 | 2020-04-10 | Under-screen fingerprint device and display module |
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| CN112380964A (en) * | 2020-11-11 | 2021-02-19 | 京东方科技集团股份有限公司 | Photoelectric detection substrate and display device |
| TWI749864B (en) * | 2020-11-12 | 2021-12-11 | 友達光電股份有限公司 | Optical sensing module |
| WO2022183333A1 (en) * | 2021-03-01 | 2022-09-09 | 深圳市大疆创新科技有限公司 | Infrared image sensor, and infrared image processing method and apparatus |
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| JPH10163462A (en) * | 1996-11-29 | 1998-06-19 | Sony Corp | Solid-state image sensing device of mass type filter structure and its manufacture |
| KR20070031352A (en) * | 2007-01-31 | 2007-03-19 | 삼성전자주식회사 | Image sensor and method of fabricating the same |
| CN102103685A (en) * | 2009-12-18 | 2011-06-22 | 茂晖科技股份有限公司 | Optical fingerprint identification device with living body scanning function and identification method |
| WO2017045130A1 (en) * | 2015-09-15 | 2017-03-23 | Shanghai Oxi Technology Co., Ltd | Optical fingerprint imaging system and array sensor |
| WO2020118620A1 (en) * | 2018-12-13 | 2020-06-18 | 深圳市汇顶科技股份有限公司 | Fingerprint recognition apparatus and method, and electronic device |
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| CN110164307B (en) * | 2019-05-23 | 2021-01-26 | 厦门天马微电子有限公司 | Display device with built-in fingerprint identification inductor |
| CN110582780A (en) * | 2019-08-01 | 2019-12-17 | 深圳市汇顶科技股份有限公司 | Fingerprint identification and anti-counterfeiting method and device and electronic equipment |
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