CN107977627B - Optical detection device for texture, electronic equipment and optical detection method for texture - Google Patents
Optical detection device for texture, electronic equipment and optical detection method for texture Download PDFInfo
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- CN107977627B CN107977627B CN201711249050.3A CN201711249050A CN107977627B CN 107977627 B CN107977627 B CN 107977627B CN 201711249050 A CN201711249050 A CN 201711249050A CN 107977627 B CN107977627 B CN 107977627B
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- 230000003287 optical effect Effects 0.000 title claims abstract description 75
- 238000001514 detection method Methods 0.000 title claims abstract description 73
- 238000000034 method Methods 0.000 claims description 8
- 238000007689 inspection Methods 0.000 claims description 7
- 239000006059 cover glass Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 239000011521 glass Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
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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
- G06V40/13—Sensors therefor
- G06V40/1324—Sensors therefor by using geometrical optics, e.g. using prisms
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Abstract
The invention provides an optical detection device for texture, electronic equipment and an optical detection method for texture. The optical detection device comprises a transparent cover plate, a light source and a photosensitive element, wherein the transparent cover plate is provided with a first surface and a second surface which are connected with and opposite to a light inlet surface and a light outlet surface, the first surface is provided with a touch area, the touch area comprises at least one touch area formed by the first area and the second area, each second area and each first area are alternately arranged, the light source is arranged on one side of the transparent cover plate and is close to the light inlet surface and is used for emitting detection light beams entering the transparent cover plate, the detection light beams comprise first light beams and second light beams, the first light beams are used for carrying out total reflection in the first area and emitting from the light outlet surface, the second light beams are used for carrying out total reflection in the second area and emitting from the light outlet surface, and the photosensitive element is arranged on the other side of the transparent cover plate and is close to the light outlet surface and is used for receiving the first light beams and/or the second light beams emitted from the light outlet surface and converting optical information into grain image information.
Description
Technical Field
The invention relates to the technical field of detection, in particular to an optical detection device for grains, electronic equipment and an optical detection method for the grains.
Background
With the promotion of new mobile phone technology and the continuous improvement of mobile phone user demands, in order to achieve better user experience, increasing the mobile phone screen area occupation ratio, the comprehensive screen has become a great trend of intelligent terminal development. However, with the conventional capacitive fingerprint identification technology, the capacitive detection cannot penetrate through the thick glass and the like, so that the task of removing the Home key cannot be completed.
As shown in fig. 1, an optical fingerprint recognition scheme provided in the prior art is that a light source 20 ' provides incident light to a cover glass 10 ', the diameter of the fingerprint is about 8mm, the thickness of the cover glass 10 ' is about 0.5mm, and in order to enable the incident light to cover the whole fingerprint after being projected onto the upper surface of the cover glass 10 ' from the side, an included angle between the light and the upper surface of the cover glass 10 ' is required to be particularly small (3.5-3.6 °), however, the included angle is too small to be beneficial to practical production; and limited by the thickness of the cover glass 10', the size of the photosensitive array becomes narrow and long, and similar distortion is generated in fingerprint information obtained from the photosensitive array, and the resolution of the fingerprint information in the transverse direction is reduced due to the distortion, so that the fingerprint information authentication is not facilitated. The fingerprint information before and after distortion is shown in fig. 2 and 3.
Disclosure of Invention
The invention mainly aims to provide an optical detection device for grains, electronic equipment and an optical detection method for grains, which are used for solving the problem that the resolution of transverse fingerprint information is reduced due to distortion of the obtained fingerprint information in the prior art.
In order to achieve the above object, according to one aspect of the present invention, there is provided an optical inspection apparatus for textures, comprising: the transparent cover plate is provided with a light incident surface and a light emergent surface which are opposite along a first direction, the first direction is perpendicular to the thickness direction of the transparent cover plate, the transparent cover plate is also provided with a first surface and a second surface which are connected with the light incident surface and the light emergent surface and are opposite to each other, the first surface is provided with a touch area, the touch area comprises at least one touch section consisting of a first area and a second area, and each second area is alternately arranged with each first area; the light source is arranged on one side of the transparent cover plate and is close to the light incident surface and used for emitting detection light beams entering the transparent cover plate, the detection light beams comprise first light beams and second light beams, the first light beams are used for generating total reflection in a first area and emitting from the light emergent surface, and the second light beams are used for generating total reflection in a second area and emitting from the light emergent surface; the photosensitive element is arranged on the other side of the transparent cover plate and is close to the light emitting surface and used for receiving the first light beam and/or the second light beam emitted from the light emitting surface and converting the optical information into grain image information.
Further, the touch area comprises a plurality of touch intervals, and the first light beam are totally reflected in at least two touch intervals and emitted from the light emitting surface.
Further, the first light beam includes a plurality of parallel first light rays, and the second light beam includes a plurality of parallel second light rays.
Further, the width of the first light beam is greater than or equal to the width of the touch area in the first direction, and the width of the second light beam is greater than or equal to the width of the touch area in the first direction.
Further, the optical texture detecting device further includes: the lens is arranged between the photosensitive element and the light emitting surface and is used for converging the first light beam and/or the second light beam emitted by the light emitting surface into the photosensitive element.
Further, the light source comprises a plurality of light splitting sources which are sequentially arranged along a second direction, and the second direction is perpendicular to the first direction and parallel to the light incident surface.
Further, the pitches of any adjacent light-dividing sources in the second direction are the same.
Further, the optical detection device comprises a photosensitive array formed by a plurality of photosensitive elements arranged along the second direction, and each photosensitive element is arranged in one-to-one correspondence with each light splitting source.
Further, the intervals of any adjacent photosensitive elements in the second direction are equal.
According to another aspect of the present invention, there is provided an electronic device including a display screen and an optical detection apparatus, where the optical detection apparatus includes a transparent cover plate, the transparent cover plate is disposed on the display screen, and the optical detection apparatus is the optical detection apparatus described above.
Further, the display screen is selected from LCD, LED, OLED and micro leds.
According to another aspect of the present invention, there is also provided an optical inspection method of textures, including the steps of: s1, forming lines on the first surface of a transparent cover plate, wherein the first surface of the transparent cover plate is provided with a touch area, the touch area comprises at least one touch section consisting of a first area and a second area, and each second area and each first area are alternately arranged; s2, the transparent cover plate is provided with a light inlet surface and a light outlet surface which are opposite along a first direction, the first direction is perpendicular to the thickness direction of the transparent cover plate, so that a detection light beam comprising a first light beam and a second light beam enters the transparent cover plate from the light inlet surface, the first light beam is totally reflected in a first area and is emitted from the light outlet surface, and the second light beam is totally reflected in a second area and is emitted from the light outlet surface; s3, receiving the first light beam and/or the second light beam from the light-emitting surface and converting the optical information into texture image information.
Further, in step S2, the first light beam entering the transparent cover plate is made to include a plurality of parallel first light rays, and the second light beam entering the transparent cover plate is made to include a plurality of parallel second light rays.
Further, in step S2, the width of the first light beam entering the transparent cover plate is made to be greater than or equal to the width of the touch area in the first direction, and the width of the second light beam entering the transparent cover plate is made to be greater than or equal to the width of the touch area in the first direction.
By means of the technical scheme, the optical detection device is provided, the first surface of the transparent cover plate is provided with at least one touch area, each touch area comprises at least one touch section formed by a first area and a second area, each second area and each first area are alternately arranged, a light source can emit first light beams and/or second light beams which enter the transparent cover plate, the first light beams are used for total reflection in the first areas, the second light beams are used for total reflection in the second areas, the first areas and the second areas are divided, so that the texture information can be divided into a plurality of alternately arranged odd areas and even areas in the transverse direction, the texture information obtained on the photosensitive array is a result after the texture information of the plurality of alternately arranged odd areas is overlapped, or a result after the texture information of the plurality of even areas is overlapped, authentication and processing are carried out on the overlapped texture information, and compared with authentication and processing on the distorted texture information before improvement, recognition and authentication difficulty is reduced, and actual system processing is facilitated.
In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 is a schematic diagram of an optical fingerprint detection device according to the prior art;
FIG. 2 shows a schematic representation of a fingerprint image before distortion;
FIG. 3 is a schematic view of a distorted fingerprint image obtained using the optical detection device provided in FIG. 1;
FIG. 4 is a schematic diagram showing the structure of an optical detection device according to an embodiment of the present invention;
FIG. 5 is a schematic diagram showing an optical detection device according to another embodiment of the present invention; and
fig. 6 shows a schematic diagram of a fingerprint image obtained by converting optical information of a first light beam by the image sensor in embodiment 1 of the present invention.
Wherein the above figures include the following reference numerals:
10. a transparent cover plate; 20. a light source; 210. a light splitting source; 30. a lens; 40. a photosensitive element; 11. a light incident surface; 12. a light-emitting surface; 13. a first surface; 130. a touch area; 131. a first region; 132. a second region; 100. and (5) fingerprint.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the invention herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
As described above in the background art, the resolution of the fingerprint information in the lateral direction is lowered due to distortion of the obtained fingerprint information in the related art. In order to solve the above-mentioned technical problems, the present invention provides an optical detection device for texture, as shown in fig. 4, comprising: the transparent cover plate 10 is provided with a light incident surface 11 and a light emergent surface 12 which are opposite along a first direction, the first direction is perpendicular to the thickness direction of the transparent cover plate 10, the transparent cover plate 10 is also provided with a first surface 13 and a second surface which are connected with the light incident surface 11 and the light emergent surface 12 and are opposite, the first surface 13 is provided with a touch area 130, the touch area 130 comprises at least one touch area consisting of a first area 131 and a second area 132, and each second area 132 is alternately arranged with each first area 131; the light source 20 is disposed at one side of the transparent cover plate 10 and close to the light incident surface 11, and is used for emitting a detection light beam entering the transparent cover plate 10, wherein the detection light beam comprises a first light beam and a second light beam, the first light beam is used for generating total reflection in the first area 131 and emitting from the light emergent surface 12, and the second light beam is used for generating total reflection in the second area 132 and emitting from the light emergent surface 12; the photosensitive element 40 is disposed on the other side of the transparent cover 10 and close to the light-emitting surface 12, and is configured to receive the first light beam and/or the second light beam emitted from the light-emitting surface 12 and convert the optical information into texture image information.
Since each touch area 130 includes at least one touch section composed of the first area 131 and the second area 132, each second area 132 is alternately arranged with each first area 131, the light source 20 can emit a first light beam and/or a second light beam entering the transparent cover plate 10, the first light beam is used for total reflection in the first area 131, the second light beam is used for total reflection in the second area 132, by dividing the first area 131 and the second area 132, the texture information can be divided into a plurality of alternately arranged odd areas and even areas in the transverse direction, so that the texture information obtained on the photosensitive array is the result after the superposition of the texture information of a plurality of alternately arranged odd areas, or the result after the superposition of the texture information of a plurality of even areas, and then authentication and processing are performed on the texture information after superposition.
The optical detection device can be applied to detection of various textures, and the textures can comprise various textures on the skin such as fingerprints. In the optical detection device of the present invention, if the pattern on the touch area 130 is the fingerprint 100, a certain portion of the upper surface of the cover glass is in contact with the fingerprint valley, the light is totally emitted multiple times and passes through the side surface of the cover glass and is focused on the photosensitive array through the lens 30 to form bright stripes, if a certain portion of the upper surface of the cover glass is in contact with the fingerprint ridge, the light is diffusely reflected at the contact surface due to the roughness of the contact surface, and it is difficult to form penetrating light reaching the photosensitive array to form dark stripes, so that valley and ridge information of the fingerprint can be converted into bright and dark stripe information on the photosensitive array.
The photosensitive element 40 in the optical detection device is any component capable of converting the acquired light information into the texture image information, such as an image sensor. The transparent cover plate 10 in the optical detection device can be any plate material meeting the requirements of light transmission and hardness, such as a glass cover plate, a PET cover plate and the like.
The light source 20 in the optical detection device is configured to emit the first light beam and the second light beam that enter the transparent cover plate 10, where the incident angle corresponding to the first light beam and the incident angle corresponding to the second light beam may be determined according to the size of the texture and the number of touch areas included in the touch area 130, and may also be determined by combining the thickness and the material of the transparent cover plate 10. The incident angles of the first and second light beams may be set according to actual circumstances by those skilled in the art as long as the first and second light beams are capable of total reflection while passing through the first and second regions 131 and 132, respectively.
In order to improve the detection accuracy of the optical detection device, in a preferred embodiment, the touch area 130 includes a plurality of touch regions, and the first light beam are totally reflected in at least two touch regions and emitted from the light emitting surface 12; more preferably, the first light beam and the first light beam are totally reflected in each touch area and emitted from the light emitting surface 12. As shown in fig. 4, the first surface 13 of the transparent cover plate 10 has a touch area 130 including a plurality of touch areas, and the first light beam emitted from the light source 20 is capable of being totally reflected when passing through the first area 131 in each touch area, and the second light beam emitted from the light source 20 is capable of being totally reflected when passing through the second area 132 in each touch area.
In order to further obtain the entire texture information of the touch area 130, so that the obtained image information is more accurate and better matched with the texture, the first light beam includes a plurality of parallel first light rays, and the second light beam includes a plurality of parallel second light rays; also, preferably, the width of the first beam is greater than or equal to the width of the touch area 130 in the first direction, and the width of the second beam is greater than or equal to the width of the touch area 130 in the first direction.
In the above optical detecting device of the present invention, the optical line detecting device may further include a lens 30, where the lens 30 is disposed between the photosensitive element 40 and the light-emitting surface 12, and the lens 30 is configured to collect the first light beam and/or the second light beam emitted from the light-emitting surface 12 into the photosensitive element 40. The lens 30 is configured to converge the first light beam and/or the second light beam emitted from the light emitting surface 12 into the photosensitive element 40, so that all the light beams emitted from the light emitting surface 12 are converged into the photosensitive element 40, and the image information obtained by converting the photosensitive element 40 is more accurate, thereby further improving the detection accuracy of the optical detection device.
In the optical detection device according to the present invention, the light source 20 preferably includes a plurality of light-splitting sources 210 arranged in sequence along a second direction, which is perpendicular to the first direction and parallel to the light-incident surface 11, as shown in fig. 5. The plurality of light splitting sources 210 correspondingly emit a plurality of first light beams and a plurality of second light beams, the incident angles of the first light beams can be the same or different, the incident angles of the second light beams can be the same or different, and the first light beams and the second light beams emitted by the light splitting sources 210 are totally reflected in different touch areas 130 of the transparent cover plate 10, so that more touch areas 130 can be arranged on the transparent cover plate 10, and further detection of superimposed information with more lines is realized.
In order to improve the accuracy of detecting the streaks on each touch region 130, it is preferable that the pitch of any adjacent light-dividing sources 210 in the second direction is the same, as shown in fig. 5.
In order to convert the outgoing light rays obtained after the light rays emitted by the different light splitting sources 210 are totally reflected into the grain image information, preferably, the optical detection device includes a photosensitive array formed by a plurality of photosensitive elements 40 arranged along the second direction, and each photosensitive element 40 is disposed in a one-to-one correspondence with each light splitting source 210, as shown in fig. 5. The one-to-one correspondence arrangement means not only one-to-one correspondence in number, but also one-to-one correspondence in positions of the two, that is, the outgoing light obtained by total reflection of the light emitted by one light splitting source 210 can enter the corresponding photosensitive element 40.
In order to improve the accuracy of the detection of the streaks on each touch region 130, it is preferable that the intervals of any adjacent photosensitive elements 40 in the second direction are equal.
In the above optical detection device of the present invention, the number of the light splitting sources 210 and the number of the photosensitive elements 40 are not necessarily in one-to-one correspondence, but may be other number correspondence, for example, two light splitting sources 210 correspond to one photosensitive element 40, etc., and those skilled in the art can adjust the number and positions of the light splitting sources 210 and the photosensitive elements 40 according to actual needs.
According to another aspect of the present invention, there is further provided an electronic device, including a display screen and an optical detection device, where the optical detection device includes a transparent cover plate 10, and the transparent cover plate 10 is disposed on the display screen, and the optical detection device is the optical detection device described above. The electronic equipment comprises the optical detection device for the fingerprint, so that the fingerprint identification accuracy is higher, and the safety of the electronic equipment can be better ensured.
In the electronic device of the present invention, the display screen may be selected from LCD, LED, OLED and micro leds, and those skilled in the art reasonably select the type of the display screen according to actual requirements.
According to still another aspect of the present invention, there is also provided an optical inspection method of textures, including the steps of: s1, forming lines on the first surface of a transparent cover plate, wherein the first surface of the transparent cover plate is provided with a touch area, the touch area comprises at least one touch section consisting of a first area and a second area, and each second area and each first area are alternately arranged; s2, the transparent cover plate is provided with a light inlet surface and a light outlet surface which are opposite along a first direction, the first direction is perpendicular to the thickness direction of the transparent cover plate, so that a detection light beam comprising a first light beam and a second light beam enters the transparent cover plate from the light inlet surface, the first light beam is totally reflected in a first area and is emitted from the light outlet surface, and the second light beam is totally reflected in a second area and is emitted from the light outlet surface; s3, receiving the first light beam and/or the second light beam from the light-emitting surface and converting the optical information into texture image information.
In the optical detection method of the invention, the first area and the second area are divided, the texture information can be divided into a plurality of odd areas and even areas which are alternately arranged in the transverse direction, then the angle of the first light beam and the angle of the second light beam when entering the transparent cover plate are adjusted, so that the first light beam is totally reflected in the first area and is emitted from the light emitting surface, the second light beam is totally reflected in the second area and is emitted from the light emitting surface, and the obtained texture information is the result after the superposition of the texture information of a plurality of odd areas which are arranged at intervals or the result after the superposition of the texture information of a plurality of even areas through receiving the first light beam and/or the second light beam, and then the superposed texture information is authenticated and processed.
In step S2, in order to further obtain all the texture information of the touch area, so that the obtained image information is more accurate and better matched with the texture, it is preferable that the first light beam entering the transparent cover plate includes a plurality of parallel first light rays, and the second light beam entering the transparent cover plate includes a plurality of parallel second light rays. Also, it is preferable that the width of the first light beam entering the transparent cover plate is made greater than or equal to the width of the touch area in the first direction, and the width of the second light beam entering the transparent cover plate is made greater than or equal to the width of the touch area in the first direction.
The following will further describe the optical detection device for texture provided by the present invention with reference to the embodiments.
Example 1
The optical detection device provided in this embodiment is shown in fig. 4, and includes a transparent cover plate 10, a light source 20, a lens 30 and a photosensitive element 40, where the specific positional relationship is shown in fig. 1, the transparent cover plate 10 is a glass cover plate, the length (the width of the transparent cover plate 10 in the direction perpendicular to the paper surface or the inward side of the display screen in fig. 1) of the transparent cover plate 10 is 160mm, the width (the width of the transparent cover plate 10 in the horizontal direction in fig. 1) is 56mm, the thickness is 0.5mm, and the refractive index is 1.5. The transparent cover 10 has a touch area 130 on a surface thereof, the touch area 130 has a fingerprint 100, the touch area 130 has a length of 8mm and a width of 8mm, the distance from the center of the touch area 130 to the side of the transparent cover 10 is 4mm, the touch area 130 includes two touch sections composed of a first area 131 and a second area 132, the first area 131 and the second area 132 alternate, and each of the first area 131 and the second area 132 has a length of 2mm and a width of 8mm.
The detection process adopting the optical detection device comprises the following steps:
assuming that the refractive index of the cover glass is 1.5, the incident angle of the first light beam emitted by the light source 20 on the light incident surface 11 is 48.6 °, the incident angle of the second light beam emitted by the light source 20 on the light incident surface 11 is 138.6 °, the fingerprint-touch area 130 is divided into alternating odd and even areas by the first and second areas 131 and 132;
the first light beam is totally reflected when passing through each first area 131 and enters the lens 30 through the light emitting surface 12, and enters the image sensor through the convergence of the lens 30, and the image sensor converts optical information corresponding to light in the first light beam into image information, so that a superimposed image of an odd area in the fingerprint image is finally obtained;
similarly, the second light beam is totally reflected when passing through each second area 132 and enters the lens 30 through the light emitting surface 12, and enters the image sensor through the convergence of the lens 30, and the image sensor converts the optical information corresponding to the light in the second light beam into the image information, so as to finally obtain the superimposed image of the even area in the fingerprint image.
A schematic diagram of a fingerprint image obtained by the image sensor after converting the optical information of the first light beam is shown in fig. 6.
From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:
because each touch area comprises at least one touch interval formed by a first area and a second area, each second area is alternately arranged with each first area, a light source can emit a first light beam and/or a second light beam which enter a transparent cover plate, the first light beam is used for generating total reflection in the first area, the second light beam is used for generating total reflection in the second area, and the first area and the second area are divided, so that the texture information can be divided into a plurality of odd areas and even areas which are alternately arranged in the transverse direction, the texture information obtained on the photosensitive array is the result after the superposition of the texture information of a plurality of odd areas which are alternately arranged, or the result after the superposition of the texture information of a plurality of even areas, and then authentication and processing are carried out on the overlapped texture information.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (13)
1. An optical inspection device for textures, comprising:
a transparent cover plate (10) having a light incident surface (11) and a light emergent surface (12) which are opposite along a first direction, wherein the first direction is perpendicular to the thickness direction of the transparent cover plate (10), the transparent cover plate (10) further has a first surface (13) and a second surface which are connected with the light incident surface (11) and the light emergent surface (12) and are opposite, the first surface (13) has a touch area (130), the touch area (130) comprises a plurality of touch areas consisting of a first area (131) and a second area (132), and each second area (132) is alternately arranged with each first area (131);
the light source (20) is arranged on one side of the transparent cover plate (10) and is close to the light incident surface (11) and is used for emitting detection light beams entering the transparent cover plate (10), the detection light beams comprise first light beams and second light beams, the first light beams are used for generating total reflection in the first area (131) and emitting from the light emergent surface (12), and the second light beams are used for generating total reflection in the second area (132) and emitting from the light emergent surface (12);
a photosensitive element (40) arranged on the other side of the transparent cover plate (10) and close to the light-emitting surface (12) for receiving the first light beam and/or the second light beam emitted from the light-emitting surface (12) and converting the optical information into grain image information,
the touch area (130) comprises a plurality of touch intervals, and the first light beam are totally reflected in at least two touch intervals and emitted from the light emitting surface (12).
2. The optical detection device of claim 1, wherein the first light beam comprises a plurality of parallel first light rays and the second light beam comprises a plurality of parallel second light rays.
3. The optical detection device according to claim 1, wherein the width of the first light beam is greater than or equal to the width of the touch area (130) in the first direction and the width of the second light beam is greater than or equal to the width of the touch area (130) in the first direction.
4. The optical inspection device of claim 1, wherein the texture inspection device further comprises:
and a lens (30) disposed between the photosensitive element (40) and the light-emitting surface (12), wherein the lens (30) is configured to converge the first light beam and/or the second light beam emitted from the light-emitting surface (12) into the photosensitive element (40).
5. The optical detection device according to any one of claims 1 to 4, wherein the light source (20) comprises a plurality of light splitting sources (210) arranged in sequence along a second direction, the second direction being perpendicular to the first direction and parallel to the light entrance surface (11).
6. The optical detection device according to claim 5, wherein the pitch of any adjacent ones of the light splitting sources (210) in the second direction is the same.
7. The optical detection apparatus according to claim 5, wherein the optical detection apparatus includes a photosensitive array composed of a plurality of the photosensitive elements (40) arranged in the second direction, each of the photosensitive elements (40) being disposed in one-to-one correspondence with each of the spectroscopic sources (210).
8. Optical detection device according to claim 7, characterized in that the spacing of any adjacent photosensitive elements (40) in the second direction is equal.
9. An electronic device comprising a display screen and an optical detection device, the optical detection device comprising a transparent cover plate (10), the transparent cover plate (10) being arranged on the display screen, characterized in that the optical detection device is an optical detection device according to any one of claims 1 to 8.
10. The electronic device of claim 9, wherein the display screen is selected from LCD, LED, OLED and micro leds.
11. An optical detection method of lines is characterized by comprising the following steps:
s1, forming the lines on the first surface of a transparent cover plate, wherein the first surface of the transparent cover plate is provided with a touch area, the touch area comprises a plurality of touch sections consisting of a first area and a second area, and the second areas and the first areas are alternately arranged;
s2, a transparent cover plate is provided with a light incident surface and a light emergent surface which are opposite along a first direction, the first direction is perpendicular to the thickness direction of the transparent cover plate, a detection light beam comprising a first light beam and a second light beam enters the transparent cover plate from the light incident surface, the first light beam is totally reflected in the first area and is emitted from the light emergent surface, the second light beam is totally reflected in the second area and is emitted from the light emergent surface, the touch area comprises a plurality of touch sections, and the first light beam are totally reflected in at least two touch sections and are emitted from the light emergent surface;
s3, receiving the first light beam and/or the second light beam from the light emitting surface and converting the optical information into texture image information.
12. The optical inspection method according to claim 11, wherein in the step S2, the first light beam entering the transparent cover plate is made to include a plurality of parallel first light rays, and the second light beam entering the transparent cover plate is made to include a plurality of parallel second light rays.
13. The optical detection method according to claim 11, wherein in the step S2, a width of the first light beam entering the transparent cover plate is made larger than or equal to a width of the touch area in the first direction, and a width of the second light beam entering the transparent cover plate is made larger than or equal to a width of the touch area in the first direction.
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| CN111695390A (en) * | 2019-03-15 | 2020-09-22 | 京东方科技集团股份有限公司 | Method for driving grain recognition device and grain recognition device |
| CN111952334B (en) * | 2019-05-17 | 2023-05-12 | 上海和辉光电股份有限公司 | Display panel and display device |
| WO2020248169A1 (en) * | 2019-06-12 | 2020-12-17 | 京东方科技集团股份有限公司 | Skin ridge image acquisition method, skin ridge image acquisition circuit and display panel |
| CN112307835A (en) * | 2019-07-31 | 2021-02-02 | 深圳阜时科技有限公司 | Optical detection device |
| CN112307845A (en) * | 2019-07-31 | 2021-02-02 | 深圳阜时科技有限公司 | Optical detection device |
| CN112347836A (en) * | 2019-08-07 | 2021-02-09 | 华为技术有限公司 | Fingerprint identification device and electronic terminal |
| CN110427919A (en) * | 2019-08-16 | 2019-11-08 | 深圳阜时科技有限公司 | Optical detection apparatus |
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