CN109657630B - Display panel, touch recognition method of display panel and display device - Google Patents
Display panel, touch recognition method of display panel and display device Download PDFInfo
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- CN109657630B CN109657630B CN201811591422.5A CN201811591422A CN109657630B CN 109657630 B CN109657630 B CN 109657630B CN 201811591422 A CN201811591422 A CN 201811591422A CN 109657630 B CN109657630 B CN 109657630B
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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
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/10—Image acquisition
- G06V10/12—Details of acquisition arrangements; Constructional details thereof
- G06V10/14—Optical characteristics of the device performing the acquisition or on the illumination arrangements
- G06V10/143—Sensing or illuminating at different wavelengths
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/10—Image acquisition
- G06V10/12—Details of acquisition arrangements; Constructional details thereof
- G06V10/14—Optical characteristics of the device performing the acquisition or on the illumination arrangements
- G06V10/147—Details of sensors, e.g. sensor lenses
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V20/00—Scenes; Scene-specific elements
- G06V20/60—Type of objects
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Abstract
The invention discloses a display panel, a touch recognition method of the display panel and a display device. The display panel includes: an infrared light source; a substrate base plate; the first shading layer is positioned on the substrate and comprises at least two infrared imaging holes; the photosensitive device layer is located substrate base plate and keeps away from first light shield layer one side, and the photosensitive device layer includes a plurality of infrared induction units, and wherein, the parallax error through the formation of image of two at least infrared formation of image holes on infrared induction unit calculates 3D image information. The invention can construct a 3D model for biological information detection.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display panel, a touch recognition method for the display panel, and a display device.
Background
With the development of electronic science and technology, fingerprint identification has been gradually applied to display devices such as mobile phones, and belongs to touch identification, and fingerprint identification is divided into optical fingerprint identification and capacitive fingerprint identification. The fingerprint identification is realized by detecting and constructing 2D image information, although the fingerprint is unique for individuals, the unlocking of the display device can be realized by using a specially made 'clone fingerprint' under certain conditions, and the fingerprint identification still has certain limitation because the fingerprint identification cannot be identified when the finger is stained or the skin of the finger falls off.
In the prior art, no precedent exists for realizing biological information detection by acquiring biological characteristics to construct a 3D model in a display area of a display panel.
Therefore, a display panel, a touch recognition method of the display panel, and a display device are provided to implement biological information detection by acquiring biological features and constructing a 3D model in a display area, which is a technical problem to be solved in the art.
Disclosure of Invention
In view of the above, the present invention provides a display panel, a touch recognition method for a display panel, and a display device, which solve the technical problem of constructing a 3D model by acquiring biological features to perform biological information detection.
In order to solve the above technical problem, a first aspect of the present invention provides a display panel including:
an infrared light source;
a substrate base plate;
the first shading layer is positioned on the substrate and comprises at least two infrared imaging holes;
the photosensitive device layer is located substrate base plate and keeps away from first light shield layer one side, and the photosensitive device layer includes a plurality of infrared induction units, and wherein, the parallax error through the formation of image of two at least infrared formation of image holes on infrared induction unit calculates 3D image information.
Based on the same concept, in a second aspect, the present invention provides a touch recognition method for a display panel, including:
infrared light reflected by the touch main body is imaged in the infrared sensing area through the infrared imaging hole;
and 3D image information is calculated through the imaging parallax of the at least two infrared imaging holes on the corresponding infrared sensing areas.
Based on the same concept, the invention provides a display device including any one of the display panels provided by the invention.
Compared with the prior art, the display panel, the touch recognition method of the display panel and the display device provided by the invention at least realize the following beneficial effects:
the display panel provided by the invention is provided with the infrared light source, the infrared imaging holes and the infrared sensing unit, 3D image information can be calculated through the imaging parallax of at least two infrared imaging holes K1 on the infrared sensing unit Y1, and a 3D model can be constructed for biological information detection by acquiring biological characteristics. For example, the method can be used for detecting finger vein information, the veins are hidden in the body, the probability of being copied and stolen is low, the detection cannot be influenced by the abnormality on the surface of the skin (the finger is stained or the skin of the finger falls off), the user experience can be improved, and the safety of the device can be improved.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a simplified diagram of a display panel according to an embodiment of the present invention;
FIG. 2 is a simplified schematic diagram illustrating an imaging principle of an infrared imaging aperture in a display panel according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an alternative embodiment of a display panel according to an embodiment of the invention;
FIG. 4 is a schematic diagram of another alternative embodiment of a display panel according to an embodiment of the invention;
FIG. 5 is a schematic diagram of another alternative embodiment of a display panel according to an embodiment of the invention;
FIG. 6 is a schematic diagram of another alternative embodiment of a display panel according to an embodiment of the invention;
FIG. 7 is a schematic diagram of another alternative embodiment of a display panel according to an embodiment of the invention;
FIG. 8 is a first schematic view of a projection of each imaging hole on a substrate of a display panel according to an embodiment of the present invention;
FIG. 9 is a second schematic view of a projection of each imaging hole on a substrate of a display panel according to an embodiment of the present invention;
FIG. 10 is a schematic partial cross-sectional view of another alternative embodiment of a display panel according to an embodiment of the present invention;
FIG. 11 is a schematic diagram of another alternative embodiment of a display panel according to an embodiment of the invention;
FIG. 12 is a schematic diagram of another alternative embodiment of a display panel according to an embodiment of the invention;
fig. 13 is a flowchart of a touch recognition method of a display panel according to an embodiment of the present invention;
fig. 14 is a schematic view of a display device according to an embodiment of the invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Fig. 1 is a simplified schematic diagram of a display panel according to an embodiment of the present invention. Fig. 2 is a simplified schematic diagram illustrating an imaging principle of an infrared imaging aperture in a display panel according to an embodiment of the present invention.
The display panel shown in fig. 1 includes: an infrared light source 101; a substrate base plate 102; a first light shielding layer 103 positioned on the substrate 102, the first light shielding layer 103 including at least two infrared imaging holes K1; the photosensitive device layer 104, photosensitive device layer 104 are located substrate 102 and keep away from first light shield layer 103 one side, and photosensitive device layer 104 includes a plurality of infrared induction units Y1, and infrared induction unit Y1 can sense infrared light, converts light signal into the signal of telecommunication and detects. In general, the infrared sensor units Y1 are arranged in an array, one infrared imaging hole K1 has an infrared imaging area corresponding to the infrared sensor unit Y1 in the photosensitive device layer 104, and a plurality of infrared sensor units Y1 are arranged in the infrared imaging area, and the number of the infrared sensor units Y1 in fig. 1 is only schematically shown. Wherein the 3D image information is calculated by the parallax of the imaging of the at least two infrared imaging holes K1 on the infrared sensing unit Y1. After the infrared light emitted by the infrared light source 101 irradiates the touch subject C (which may be a human finger), the infrared light is absorbed and reflected differently at different parts of the touch subject C, for example, hemoglobin in human blood has the property of absorbing infrared light. Therefore, infrared light reflected by different parts of the touch main body C can irradiate the infrared sensing unit Y1 after passing through the infrared imaging hole K1, and the infrared sensing unit Y1 recognizes the infrared light and then images.
It should be noted that fig. 1 is a simplified diagram illustrating only a part of the structure of the display panel. The arrangement position of the infrared light source is not limited in the present invention, and the position of the infrared light source 101 in fig. 1 is only schematically shown, and the infrared light source may be located in the display area of the display panel or in the non-display area of the display panel.
Parallax is the difference in direction that results from viewing the same object from two points that are some distance away. As shown in fig. 2, parallax is applied to the display panel, that is, an infrared imaging region Z corresponding to each infrared imaging hole K1 exists in the photo sensor layer 104, a plurality of infrared sensing units (not shown) are correspondingly disposed in the infrared imaging region Z, in the display panel provided with two infrared imaging holes K1, infrared light reflected by the same object can penetrate through the two infrared imaging holes K1 respectively and then is imaged in the corresponding infrared imaging regions Z, that is, the detection regions corresponding to the two infrared imaging holes K1 are overlapped, and the infrared light reflected by the same object can be detected by the infrared sensing units corresponding to the two infrared imaging holes K1 respectively in the overlapped region. That is, the two infrared imaging regions Z are equivalent to observe the same object through the respective infrared imaging holes K1, and due to different angles of observing the object, the shapes of the observed objects are different, that is, parallax exists between the images in the two infrared imaging regions Z, and a 3D model of the object can be constructed by calculating the imaging parallax in the infrared imaging region Z. The example of the present invention is only shown by providing two infrared imaging holes K1, and optionally, three or more infrared imaging holes may be provided, so that a 3D model may be constructed according to imaging parallaxes corresponding to a plurality of infrared imaging holes.
The display panel provided by the invention is provided with the infrared light source, the infrared imaging holes and the infrared sensing unit, 3D image information can be calculated through the imaging parallax of at least two infrared imaging holes K1 on the infrared sensing unit Y1, and a 3D model is constructed for biological information detection. For example, the method can be used for detecting finger vein information, the veins are hidden in the body, the probability of being copied and stolen is low, the detection cannot be influenced by the abnormality on the surface of the skin (the finger is stained or the skin of the finger falls off), the user experience can be improved, and the safety of the device can be improved.
With continued reference to FIG. 2, the distance between two adjacent infrared imaging holes K1 is d2, wherein d2 is less than or equal to 2mm and less than or equal to 10 mm. d2 is the straight-line distance separating two adjacent infrared imaging holes K1. If the distance between the two infrared imaging holes is too small, it may cause a small parallax between the images of the two infrared imaging holes on the respective infrared sensing units Y1, i.e. the visual difference is small, and it is difficult to construct an accurate 3D model. If the distance between the two infrared imaging holes is too large, the overlapping area which can be detected by the two infrared imaging holes is relatively small, the information quantity which can be used for constructing the 3D model is less, and the accuracy in detection is correspondingly influenced. The distance between two adjacent infrared imaging holes is set to meet a certain range, so that good parallax can be achieved, sufficient information quantity for constructing a 3D model can be guaranteed, and accuracy of biological information detection can be guaranteed.
In an embodiment, fig. 3 is a schematic diagram of an alternative implementation manner of a display panel according to an embodiment of the present invention. As shown in fig. 3, the display panel further includes a display layer 106, and the display layer 106 is located on a side of the first light shielding layer 103 away from the substrate 102. The display panel may further include an array layer 105, where the array layer 105 is located on a side of the first light shielding layer 103 away from the display layer 106. A plurality of display devices 1061 may be included in the display layer 106, and optionally, the display devices 1061 may be organic light emitting devices. In the display panel, one sub-pixel includes an opening region, one opening region includes the display device 1061, and a non-opening region is located between two adjacent opening regions, in general, the light transmittance of the region where the display device is located is substantially zero, that is, in order to realize that the infrared light reflected by the touch subject can penetrate through the infrared imaging hole to reach the photosensitive device layer, the infrared imaging hole K1 is designed to be located in the non-opening region (i.e., the region located between two adjacent display devices 1061). In this embodiment, the interval that has array layer and substrate base plate at least between first light shield layer and photosensitive device layer guarantees promptly that to have a certain distance between infrared imaging hole and the formation of image position (on the photosensitive device layer), can satisfy the image distance size demand of aperture formation of image principle, and then can guarantee to be detected the object and can form images in photosensitive device layer is complete, need not set up extra rete thickness and satisfies the image distance requirement, is favorable to display panel's slimming. Optionally, in the above embodiment, the array layer may also be located on a side of the first light shielding layer away from the substrate.
In an embodiment, fig. 4 is a schematic view of another alternative implementation of the display panel according to the embodiment of the present disclosure. As shown in fig. 4, the display panel further includes a display layer 106, and the display layer 106 is located on a side of the first light shielding layer 103 close to the substrate 102. The display panel further includes an array layer 105, and the array layer 105 is located between the substrate base plate 102 and the display layer 106. The display layer 106 includes a plurality of display devices 1061, and optionally, the display devices 1061 may be organic light emitting devices. Optionally, in order to ensure that the display performance of the display panel is not affected, as shown in the figure, an opening K2 may be further disposed in the first light shielding layer 103, and the opening K2 corresponds to the display devices 1061, that is, an opening K2 is disposed in the first light shielding layer 103 above each display device 1061. In this embodiment, the interval that has display layer, array layer and substrate base plate at least between first light shield layer and photosensitive device layer can guarantee promptly that infrared formation of image hole and formation of image position (on the photosensitive device layer) have sufficient distance between, can satisfy the image distance size demand of aperture formation of image principle, and then can guarantee to be detected the object and can form images in photosensitive device layer is complete, need not set up extra rete thickness and satisfy the image distance requirement, be favorable to display panel's slimming. In addition, in order to avoid the influence of the first light shielding layer on the display of the display panel, the distance between the first light shielding layer and the display layer can be set to be as small as possible, and the light emitted by the display device is ensured not to be shielded by the first light shielding layer as much as possible so as to ensure the aperture opening ratio of the display panel.
In some optional embodiments, the material for forming the first light shielding layer may also be a material that can be penetrated by visible light but cannot be penetrated by infrared light.
Optionally, the material for manufacturing the first light shielding layer may include a metal material. In one embodiment, the first light-shielding layer may be made of the same material as that of the black matrix in the display panel.
The display panel provided by the invention can also be provided with a visible light imaging hole, and the detection of light sensing fingerprint identification is realized through the cooperation of the visible light imaging hole and the visible light sensing unit, so that the display panel has the functions of 3D biological characteristic detection and 2D biological characteristic detection. The light source used during fingerprint identification detection can be an external light source which is independently arranged, or a display device in a multiplexing display layer can be used as the light source.
In one embodiment, the visible imaging aperture and the infrared imaging aperture are in the same light shield layer. Fig. 5 is a schematic diagram of another alternative implementation of the display panel according to the embodiment of the present invention. As shown in fig. 5, the first light shielding layer 103 further includes a plurality of visible light imaging holes K3, and the photosensitive device layer 104 further includes a plurality of visible light sensing units Y2, wherein one visible light imaging hole K3 needs to correspond to a plurality of visible light sensing units Y2. The display layer 106 is illustrated as being located on the side of the first light-shielding layer 103 away from the base substrate 102. Optionally, the display layer may also be located on a side of the first light shielding layer close to the substrate. Two visible light imaging holes K3 are only schematically shown in the figure, and in practice, a complete fingerprint pattern needs to be spliced according to the imaging on the photosensitive device layer 104 through the plurality of visible light imaging holes K3 to realize fingerprint identification. Fig. 5 is a schematic representation of only the display device in the multiplexed display layer as a light source for light-sensitive fingerprint recognition. The visible light rays reflected by the touch subject C reach the photosensitive device layer 104 after penetrating through the visible light imaging hole K3, and the optical signal is converted into an electrical signal by the detection of the visible light sensing unit Y2.
The display panel that this embodiment provided, when there is touch main part touch display panel, can open the function that 3D biological characteristic detected and 2D biological characteristic detected simultaneously, through constructing 3D model (for example 3D finger vein model) and 2D fingerprint identification model, carry out cooperation detection jointly, have dual fail-safe, just calculate when two detections all pass and verify touch operation effectively, can effectual improvement detect the degree of accuracy and security. Optionally, the 3D biometric detection function and the 2D biometric detection function may also be applied to different usage scenarios, or different detection functions may also be applied according to different security level settings. In addition, in the embodiment, the visible light imaging hole and the infrared imaging hole are arranged on the same shading layer, the etching process of the shading film layer and the shading layer is not needed to be added, the manufacturing of the visible light imaging hole and the infrared imaging hole can be realized by only manufacturing the etching process on one shading layer when the display panel is manufactured, the thickness of the film layer of the display panel is not increased, the process procedure is simplified, and the production efficiency is improved.
Optionally, the visible imaging aperture and the infrared imaging aperture may be located in different light shielding layers.
In an embodiment, fig. 6 is a schematic diagram of another alternative implementation of the display panel according to the embodiment of the present disclosure. As shown in fig. 6, the display panel further includes a second light-shielding layer 107, where the second light-shielding layer 107 is located on a side of the display layer 106 close to the substrate 102; the second light shielding layer 107 includes a plurality of visible light imaging apertures K3; the photosensitive device layer 104 also includes a plurality of visible light sensing units Y2. In the figure, only the first light-shielding layer 103 and the second light-shielding layer 107 may be respectively located on two sides of the display layer 106 as an example. Optionally, the first light-shielding layer 103 is further provided with an opening K3', and the opening K3' corresponds to the visible light imaging hole K3 in the direction perpendicular to the display panel, so as to ensure that light can penetrate through the first light-shielding layer 103 from the opening K3', then penetrate through the visible light imaging hole K3, and then reach the visible light sensing unit Y2 of the light-sensing device layer 104; the second light-shielding layer 107 is further provided with an opening K1', and an opening K1' corresponds to the infrared imaging hole K1 in the direction perpendicular to the display panel, so that infrared light can penetrate through the infrared imaging hole K1 and then penetrate through the second light-shielding layer 107 through the opening K1', and then reach the infrared sensing unit Y1 of the photosensitive device layer 104.
In an embodiment, fig. 7 is a schematic diagram of another alternative implementation of the display panel according to the embodiment of the present disclosure. As shown in fig. 7, the display panel further includes a second light-shielding layer 107, where the second light-shielding layer 107 is located on a side of the display 106 layer away from the substrate 102; the second light shielding layer 107 includes a plurality of visible light imaging apertures K3; the photosensitive device layer 104 also includes a plurality of visible light sensing units Y2. Optionally, the second light-shielding layer 107 is further provided with an opening K1', and the opening K1' corresponds to the infrared imaging hole K1 in the direction perpendicular to the display panel; the first light-shielding layer 103 is further provided with an opening K3', and an opening K3' corresponds to the visible light imaging hole K3 in the direction perpendicular to the display panel.
Optionally, the first light shielding layer and the second light shielding layer may also be located on the same side of the display layer, that is, the first light shielding layer and the second light shielding layer may both be located on one side of the display layer close to the substrate; or the first shading layer and the second shading layer are both positioned on one side of the display layer far away from the substrate. When the first light shielding layer and the second light shielding layer are located on the same side of the display layer, the upper and lower positions of the first light shielding layer and the second light shielding layer are not limited.
In an embodiment, fig. 8 is a first schematic view illustrating a projection of each imaging hole on a substrate in a display panel according to an embodiment of the present invention. Fig. 9 is a second schematic view of a projection of each imaging hole on the substrate of the display panel according to the embodiment of the present invention. As shown in fig. 8 and 9, the plurality of visible light imaging holes K3 are arranged in an array on the orthographic projection Z1 of the substrate base plate 102 to form a projection array; the orthographic projection Z2 of the infrared light imaging aperture K1 on the substrate base plate 102 is outside the projection array. The number of visible light imaging apertures K3 in the projection array is shown only schematically. Fig. 8 shows a case where two infrared light imaging holes K1 are included in the display panel, and fig. 9 shows a case where four infrared light imaging holes K1 are included in the display panel. The arrangement of the visible light imaging holes and the infrared light imaging holes illustrated in this embodiment is also applicable to the above-described embodiments corresponding to fig. 5 to 7. The embodiment can ensure that the visible light imaging holes and the infrared imaging holes correspond to the same detection area in the display panel, when a touch main body touches the display panel, visible light reflected by the touch main body penetrates through the plurality of visible light imaging holes and then is detected by the visible light induction units in the corresponding visible light imaging areas, and detection information in the plurality of visible light imaging areas is processed and spliced into complete fingerprint image information. Meanwhile, infrared light reflected by the touch main body penetrates through the at least two infrared imaging holes and then is detected by the infrared sensing units in the corresponding infrared imaging areas, and imaging parallax errors in the at least two infrared imaging areas are processed to construct a 3D biological feature detection model. Thereby realizing the 2D biological characteristic (fingerprint image information detection) and the 3D biological characteristic detection of the touch subject at the same time. Optionally, the 2D biometric detection function and the 3D biometric detection function may not be simultaneously turned on, so as to be respectively applied to different usage scenarios.
In any embodiment in which the visible light imaging apertures and the infrared imaging apertures are provided simultaneously, the spacing between two adjacent visible light imaging apertures is smaller than the spacing between two adjacent infrared imaging apertures. In order to realize the identification of the fingerprint information, a large number of visible light imaging holes need to be arranged, each visible light imaging hole respectively identifies partial fingerprint image information (equivalent to a fragment type fingerprint image) in an imaging area corresponding to the photosensitive device layer, and a large number of fragment type fingerprint images are spliced to form a complete fingerprint image, so that the requirement on the accuracy of visible light imaging is high, the distance between the visible light imaging holes is small, and the completeness and the accuracy of fingerprint image detection can be ensured. When the infrared 3D biological characteristics are detected, in order to guarantee good parallax, a large enough distance needs to be arranged between two adjacent infrared imaging holes.
Optionally, as shown in FIG. 9, the distance between two adjacent visible light imaging holes K3 is d1, wherein d1 is 0.5mm ≦ 1 mm. The distance between the visible light imaging holes is set to meet a certain range, the phenomenon that the imaging areas corresponding to two adjacent visible light imaging holes are overlapped excessively due to too small distance is avoided, the operation amount of data processing is increased, meanwhile, the phenomenon that light reflected by partial fingerprint areas cannot penetrate through the visible light imaging holes to image on the photosensitive device layer due to too large distance is avoided, and then the loss of partial fingerprint information cannot be spliced into complete fingerprint image information. Optionally, the distance between two adjacent infrared imaging holes K1 is d2 as shown in FIG. 9, wherein d2 is larger than or equal to 2mm and smaller than or equal to 10 mm. The distance between two adjacent infrared imaging holes is set to meet a certain range, so that better parallax can be achieved, sufficient information quantity for constructing a 3D model can be guaranteed, and the accuracy of biological information detection can be guaranteed.
The larger the diameter of the infrared imaging hole is, the more the light quantity which can penetrate through the infrared imaging hole and reach the infrared sensing unit is, and accordingly the accuracy of 3D biological feature detection can be improved. Likewise, the larger the diameter of the visible light imaging aperture, the corresponding increased accuracy of 2D biometric detection (fingerprinting). In practice, the diameter of the infrared imaging hole and the diameter of the visible light imaging hole can be designed according to the detection precision requirement. Optionally, the diameter of the infrared imaging hole may be set to be larger than the diameter of the visible light imaging hole while ensuring the accuracy of 3D biometric detection and the accuracy of 2D biometric detection.
The display panel provided by the invention is provided with the visible light sensing unit and the infrared sensing unit on the sensing device layer. The visible light induction units and the infrared induction units can be manufactured separately, the visible light induction units can sense and detect visible light, and the infrared induction units can sense and detect infrared light. The visible light sensing unit is arranged in an imaging area corresponding to the visible light imaging hole, and the infrared sensing unit is arranged in an imaging area corresponding to the infrared imaging hole, so that the visible light sensing unit and the infrared sensing unit are different independent structures.
Optionally, the sensing unit with the photosensitive characteristic may be manufactured on the whole surface, and then different areas with different photosensitive characteristics may be realized by setting filter layers with different filter characteristics. Fig. 10 is a schematic partial cross-sectional view of another alternative embodiment of a display panel according to an embodiment of the present invention. As shown in fig. 10, the photo sensor layer 104 includes a visible light sensing area Q1 and an infrared sensing area Q2, a visible light filter layer L1 is disposed in the visible light sensing area Q1, the visible light filter layer L1 can ensure that visible light can pass through, and other light rays are blocked by the visible light filter layer L1, a plurality of visible light sensing units Y2 are located on one side of the visible light filter layer L1, which is far away from the substrate 102, an infrared filter layer L2 is disposed in the infrared sensing area Q2, the infrared filter layer L2 can ensure that infrared light can pass through, and other light rays are blocked, and a plurality of infrared sensing units Y1 are located on one side of the infrared filter layer L2, which is far away from the. In the display panel provided by the embodiment, the visible light sensing unit and the infrared sensing unit can be manufactured in the same process, and then different light rays can be detected by manufacturing different filter layers on different areas, so that the manufacturing process of the sensing unit can be simplified.
In an embodiment, fig. 11 is a schematic view of another alternative implementation of the display panel according to the embodiment of the present disclosure. As shown in fig. 11, the display panel includes a display area AA and a non-display area BA surrounding the display area AA, and the infrared light source 101 is located in the non-display area BA. The arrangement position and the number of the infrared light sources 101 are shown schematically in the drawing, and the infrared light sources 101 may be arranged at a position closer to the 3D biological detection region Q3 in the display area. Optionally, a plurality of 3D biological detection areas may be disposed in the display area AA, or the entire display area AA may be capable of realizing 3D biological detection. The number of the infrared light sources is not limited, and the infrared light sources can be designed according to specific requirements in practice. The infrared light source is arranged in the non-display area, and the design of the display area is not influenced.
In an embodiment, fig. 12 is a schematic view of another alternative implementation of the display panel according to the embodiment of the present disclosure. As shown in fig. 12, the display panel includes a display area AA and a non-display area BA surrounding the display area AA, and the infrared light source 101 is located in the display area AA. Optionally, the infrared light source 101 may occupy a space of one sub-pixel, and when the 3D biometric detection area Q3 is subjected to 3D biometric feature detection, the infrared light source 101 is turned on, and when the display panel displays normally, the infrared light source 101 is turned off. The infrared light source 101 occupies a small space in the display area AA, and the display effect of the display area is not affected.
The present invention further provides a touch recognition method for a display panel, and fig. 13 is a flowchart of the touch recognition method for a display panel according to the embodiment of the present invention, and as shown in fig. 13, the touch recognition method includes:
step S101: infrared light reflected by the touch main body is imaged in the infrared sensing area through the infrared imaging hole;
step S102: and 3D image information is calculated through the imaging parallax of the at least two infrared imaging holes on the corresponding infrared sensing areas.
Fig. 2 is a schematic diagram of a touch recognition method according to this embodiment, and the touch recognition method according to the present invention can be applied to the display panel according to any of the above embodiments, and calculates 3D image information by using parallax of images of at least two infrared imaging holes on the corresponding infrared sensing regions, so as to construct a 3D model for biological information detection. For example, the method can be used for detecting finger vein information, the veins are hidden in the body, the probability of being copied and stolen is low, the detection cannot be influenced by the abnormality on the surface of the skin (the finger is stained or the skin of the finger falls off), the user experience can be improved, and the safety of the device can be improved.
Further, the touch identification method further includes: visible light reflected by the touch main body forms an image on the visible light sensing area through the visible light imaging hole; and calculating 2D image information through imaging on the plurality of visible light sensing areas. 2D image information, namely fingerprint information, can be spliced through imaging on the plurality of visible light induction areas, and fingerprint identification and detection are realized. Optionally, the 3D image information and the 2D image information can be jointly matched for detection, double insurance is achieved, the touch operation is verified to be effective when the two detections pass, and the accuracy and the safety of the detection can be effectively improved. Optionally, the 3D image information detection and the 2D image information detection may also be applied to different usage scenarios, or different detection functions may also be applied according to different security level settings.
The invention further provides a display device, and fig. 14 is a schematic view of the display device provided by the embodiment of the invention. The display device shown in fig. 14 includes the display panel 100 provided in any embodiment of the present invention.
As can be seen from the foregoing embodiments, the display panel, the touch recognition method of the display panel, and the display device provided by the present invention at least achieve the following beneficial effects:
the display panel provided by the invention is provided with the infrared light source, the infrared imaging holes and the infrared sensing unit, 3D image information can be calculated through the imaging parallax of at least two infrared imaging holes K1 on the infrared sensing unit Y1, and a 3D model can be constructed for biological information detection by acquiring biological characteristics. For example, the method can be used for detecting finger vein information, the veins are hidden in the body, the probability of being copied and stolen is low, the detection cannot be influenced by the abnormality on the surface of the skin (the finger is stained or the skin of the finger falls off), the user experience can be improved, and the safety of the device can be improved.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (11)
1. A display panel, comprising:
an infrared light source;
a substrate base plate;
the first shading layer is positioned on the substrate and comprises at least two infrared imaging holes and a plurality of visible light imaging holes;
the photosensitive device layer is positioned on one side, far away from the first shading layer, of the substrate base plate and comprises a plurality of infrared sensing units and a plurality of visible light sensing units, wherein 3D image information is calculated through parallax of images formed by at least two infrared imaging holes on the infrared sensing units, and 2D image information is calculated through images formed by a plurality of visible light imaging holes on the visible light sensing units;
the visible light sensing unit and the infrared sensing unit are manufactured in the same process;
the photosensitive device layer comprises a visible light sensing area and an infrared sensing area, the visible light sensing area is provided with a visible light filtering layer, the visible light sensing units are located on one side, away from the substrate base plate, of the visible light filtering layer, the infrared sensing area is provided with an infrared filtering layer, and the infrared sensing units are located on one side, away from the substrate base plate, of the infrared filtering layer.
2. The display panel according to claim 1,
the display panel further comprises a display layer which,
the display layer is positioned on one side of the first shading layer far away from the substrate; or the display layer is positioned on one side of the first shading layer close to the substrate.
3. The display panel according to claim 1,
the distance between two adjacent visible light imaging holes is smaller than the distance between two adjacent infrared imaging holes.
4. The display panel of claim 3, wherein the distance between two adjacent visible light imaging holes is d1, wherein d1 is 0.5mm ≦ 1 mm.
5. The display panel according to claim 1,
the plurality of visible light imaging holes are arranged in an array in the orthographic projection of the substrate base plate to form a projection array;
the infrared light imaging hole is projected outside the projection array at the orthographic projection of the substrate base plate.
6. The display panel according to claim 1,
the diameter of the infrared imaging hole is larger than that of the visible light imaging hole.
7. The display panel according to claim 1,
the distance between two adjacent infrared imaging holes is d2, wherein d2 is more than or equal to 2mm and less than or equal to 10 mm.
8. The display panel according to claim 1,
the display panel comprises a display area and a non-display area surrounding the display area, and the infrared light source is located in the non-display area.
9. The display panel according to claim 1,
the display panel comprises a display area and a non-display area surrounding the display area, and the infrared light source is positioned in the display area.
10. A touch recognition method for a display panel according to any one of claims 1 to 9, the touch recognition method comprising:
infrared light reflected by the touch main body is imaged in the infrared sensing area through the infrared imaging hole; visible light reflected by the touch main body forms an image on the visible light sensing area through the visible light imaging hole;
and 3D image information is calculated through the parallax of the images of at least two infrared imaging holes on the infrared sensing areas corresponding to the infrared imaging holes respectively, and 2D image information is calculated through the images of a plurality of visible light sensing areas.
11. A display device characterized by comprising the display panel according to any one of claims 1 to 9.
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| CN111723781B (en) * | 2020-07-28 | 2022-09-20 | 厦门天马微电子有限公司 | Display panel and display device |
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