CN110633695B - Line identification module and display device - Google Patents
Line identification module and display device Download PDFInfo
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- CN110633695B CN110633695B CN201910937099.0A CN201910937099A CN110633695B CN 110633695 B CN110633695 B CN 110633695B CN 201910937099 A CN201910937099 A CN 201910937099A CN 110633695 B CN110633695 B CN 110633695B
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/15—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on an electrochromic effect
- G02F1/153—Constructional details
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/15—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on an electrochromic effect
- G02F1/153—Constructional details
- G02F1/155—Electrodes
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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
Abstract
The invention relates to a line identification module and display equipment. Line identification module includes: the device comprises a light source array, an electrochromic array and an image sensor array; the electrochromic array is positioned between the light source array and the image sensor array; the light source array comprises a plurality of light sources, the electrochromic device array comprises a plurality of electrochromic devices, and the image sensor array comprises a plurality of image sensors; the grain identification module is configured to emit light from a light source in a first light-emitting area at a first moment in the process of grain acquisition, an imaging image of the first light-emitting area comprises a first non-imaging area and a first imaging area, an electrochromic device in the first electrochromic area is in a light-shading state in the process of grain acquisition, so that light emitted from the light source and reflected by grains is prevented from reaching the first non-imaging area, and the electrochromic device outside the first electrochromic area is in a light-transmitting state. According to the embodiment of the invention, the afterimage phenomenon generated by time-sharing lighting of the light source can be eliminated.
Description
Technical Field
The invention relates to the technical field of display, in particular to a grain identification module and display equipment.
Background
In the related art, a narrow-bezel display screen technology gradually becomes the mainstream, and one of the means for realizing the technology is to integrate an image sensor with a fingerprint identification function into a display screen to realize the fingerprint identification under the screen so as to increase the area of a display area of the display screen.
In the optical fingerprint identification process, when the distance between an operation body with a grain such as a finger and the like and the image sensor is large, the problem of fuzzy acquired images can be caused due to the scattering of light reflected by the operation body, and further, the grain information identified according to the light received by the image sensor is inaccurate. In order to solve the problems, the light is generally modulated by the collimator to distinguish the grain information, but the optical collimation layer is arranged under the screen to lead the whole grain identification module to become thick. Therefore, finding a path-free texture recognition is a hot spot in the field of texture recognition.
In the related art, a scheme without light path grain identification is to use a point light source with a certain light emitting area, an imaging area of grains is annular, the imaging area is small, a plurality of annular imaging areas are obtained by lighting different light emitting areas for many times, and then the plurality of annular imaging areas are spliced to obtain a large grain image. However, the afterimage phenomenon occurs when different light emitting areas are lighted in a time-sharing manner.
Disclosure of Invention
The invention provides a grain identification module and display equipment, which are used for solving the defects in the related technology.
According to a first aspect of the embodiments of the present invention, there is provided a grain recognition module, including: the device comprises a light source array, an electrochromic array and an image sensor array;
the electrochromic array is located between the light source array and the image sensor array; the light source array comprises a plurality of light sources, the electrochromic array comprises a plurality of electrochromic devices, and the image sensor array comprises a plurality of image sensors; the image sensor is configured to receive light emitted from the light source and reflected by the texture and transmitted to the image sensor by the electrochromic device for texture collection;
the texture recognition module is configured to emit light by a plurality of light sources in a first light emitting area at a first moment in a texture acquisition process to serve as photosensitive light sources of the image sensor array; the imaging image of the first light-emitting area comprises a first non-imaging area and a first imaging area; the first imaging area is used for acquiring a first texture image; and
in the process of line collection, a plurality of electrochromics in the first electrochromism area are in a shading state to prevent light emitted by the light source and reflected by lines from reaching the first non-imaging area, the electrochromics outside the first electrochromism area are in a light-transmitting state to transmit the light emitted by the light source and reflected by the lines, and the image sensor receives the light transmitted by the electrochromics to obtain the first line image.
In one embodiment, the electrochromic device comprises: the electrochromic device comprises a first transparent electrode, an electrochromic layer, an ion conductor layer, an ion storage layer and a second transparent electrode;
the second transparent electrode is positioned at one side close to the image sensor array, the ion storage layer is positioned on the second transparent electrode, the ion conductor layer is positioned on the ion storage layer, the electrochromic layer is positioned on the ion conductor layer, and the first transparent electrode is positioned on the electrochromic layer;
when a forward direct current voltage is applied between the first transparent electrode and the second transparent electrode, ions in the ion storage layer are extracted, after the ions enter the electrochromic layer through the ion conductor layer, the electrochromic layer changes color and absorbs light which is emitted from the light source and is reflected to the electrochromic layer through lines, and the electrochromic device is in a light-shielding state;
when reverse direct-current voltage is applied between the first transparent electrode and the second transparent electrode, ions in the electrochromic layer are pumped out and then enter the ion storage layer through the ion conductor layer, the electrochromic layer fades to a light-transmitting state, and the electrochromic device is in the light-transmitting state.
In one embodiment, the material of the electrochromic layer is tungsten trioxide, molybdenum trioxide or titanium dioxide.
In one embodiment, the texture recognition module further comprises a linear polarizer positioned between the array of light sources and the array of electrochromic devices; the transmission vibration direction of the linear polaroid is a first direction; the electrochromic device comprises: a third transparent electrode, a liquid crystal layer and a fourth transparent electrode; the liquid crystal layer is positioned between the third transparent electrode and the fourth transparent electrode;
when no electric signal is applied between the third transparent electrode and the fourth transparent electrode, the transmission direction of the liquid crystal layer is the first direction, and the electrochromic device is in a transmission state;
when an electric signal is applied between the third transparent electrode and the fourth transparent electrode, the transmission direction of the liquid crystal layer is the second direction, the second direction is perpendicular to the first direction, and the electrochromic device is in a shading state.
In one embodiment, the area of the first electrochromic region is greater than or equal to the area of the first light-emitting region and less than or equal to the area of the first non-imaging region.
In one embodiment, the texture identifying module comprises a display panel, wherein the display panel comprises a pixel unit array, and the pixel unit array comprises a plurality of pixel units; the light source array comprises the pixel unit array, and the plurality of light sources comprise a plurality of pixel units;
the grain identification module is configured to emit light by a plurality of pixel units in a first light-emitting area at a first moment in the process of grain acquisition to serve as a photosensitive light source of the image sensor array.
In one embodiment, the electrochromic array is fixed on the surface of the display panel close to the image sensor array, or the electrochromic array is positioned on the image sensor array, and the electrochromic is positioned on the surface of the image sensor close to the light source.
In one embodiment, the texture recognition module is further configured to emit light from a plurality of light sources in a second light emitting region at a second moment in the texture acquisition process to serve as photosensitive light sources of the image sensor array; the second moment is different from the first moment, the second light emitting area is overlapped with the first light emitting area, and the imaged image of the second light emitting area comprises a second non-imaged area and a second imaged area; the second imaging area is used for acquiring a second texture image; the second imaging region overlaps the first non-imaging region.
In one embodiment, the shape of the second light emitting zone is the same as the shape of the first light emitting zone.
According to a second aspect of the embodiments of the present invention, a display device is provided, which includes the above-mentioned texture recognition module and a controller; the controller is electrically connected with the light source array and the electrochromic device array respectively;
the controller is configured to illuminate a plurality of light sources in a first light-emitting area at a first time during texture acquisition as photosensitive light sources of the image sensor array; the imaging image of the first light-emitting area comprises a first non-imaging area and a first imaging area; the first imaging area is used for acquiring a first texture image;
the controller is further configured to control the plurality of electrochromic devices in the first electrochromic region to be in a light-blocking state to prevent light emitted from the light source and reflected by the texture from reaching the first non-imaging region and to control the electrochromic devices outside the first electrochromic region to be in a light-transmitting state to transmit light emitted from the light source and reflected by the texture, and the image sensor receives the light transmitted from the electrochromic devices to obtain the first texture image, during texture acquisition.
According to the above embodiment, since the electrochromic device array is located between the light source array and the image sensor array, and in the texture collection process, when the plurality of light sources in the first light emitting area are lighted at the first time to perform texture collection, the plurality of electrochromic devices in the first electrochromic region are in the light-shielding state to prevent the light emitted from the light sources and reflected by the textures from reaching the first non-imaging area, and the electrochromic devices located outside the first electrochromic region are in the light-transmitting state to transmit the light emitted from the light sources and reflected by the textures, so that the image sensor receives the light transmitted from the electrochromic devices to obtain the first texture image, in this way, the first electrochromic region prevents the light emitted from the light sources from reaching the first non-imaging area at the first time in the texture collection process, and the afterimage phenomenon that may occur when the light sources are lighted at different times can be eliminated.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic structural diagram of a texture recognition module according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a structure of an imaged image shown in accordance with an embodiment of the present invention;
FIG. 3A is a schematic diagram of the structure of an imaged image shown in accordance with the prior art;
FIG. 3B is a schematic diagram illustrating an image retention phenomenon according to the prior art;
FIG. 4 is a schematic illustration of an imaged image shown in accordance with an embodiment of the present invention;
FIG. 5 is a schematic diagram of a textured image according to an embodiment of the invention;
FIG. 6 is a schematic diagram of another textured image according to an embodiment of the invention;
FIG. 7 is a schematic diagram of an electrochromic device according to an embodiment of the invention;
FIG. 8 is a schematic diagram of another electrochromic device according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram illustrating a display device according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
An embodiment of the present invention provides a pattern recognition module. The grain identification module can be used for identifying grains, and the grains can be fingerprints or palm grains. This line identification module includes: a light source array, an electrochromic array, and an image sensor array.
The electrochromic array is located between the light source array and the image sensor array. As shown in fig. 1, the light source array includes a plurality of light sources 11, the electrochromic array includes a plurality of electrochromic devices 12, and the image sensor array includes a plurality of image sensors 13. The image sensor 13 is configured to receive light emitted from the light source 11 and reflected by the texture, and transmitted to the image sensor 13 by the electrochromic device 12 for texture acquisition. The plurality of image sensors 13 synthesize a grain pattern from an electrical signal generated by received light.
Electrochromic is a phenomenon in which optical properties (reflectance, transmittance, absorption, and the like) of a material undergo a stable and reversible color change under the action of an applied electric field, and the material appears to have a reversible change in color and transparency in appearance. Materials with electrochromic properties are called electrochromic materials, and devices made of electrochromic materials are called electrochromic devices.
The grain identification module is configured to emit light from the plurality of light sources 11 in the first light-emitting area at the first time during the grain collection process, so as to serve as a photosensitive light source of the image sensor array. As shown in fig. 2, the imaged image of the first luminescence region includes a first non-imaged region 21 and a first imaged region 22, and the first imaged region 22 is used to obtain a first texture image. Wherein the first imaging area 22 surrounds the first non-imaging area 21.
It should be noted that the imaging image of the first light-emitting area refers to an image captured by the image sensor array through light sensing when the plurality of light sources 11 in the first light-emitting area emit light. Fig. 3A is an imaged image 31 of a first light-emitting region in the related art when no electrochromic array is provided between the light source array and the image sensor array. The imaged image 31 includes a third non-imaged region 311 and a third imaged region 312, the third non-imaged region 311 includes a highlight region Q1 and a dark region Q2, both the highlight region Q1 and the dark region Q2 have no texture image, the third imaged region 312 includes first light stripes 313 and first dark stripes 314 alternately arranged, and the first light stripes 313 and the first dark stripes 314 alternately arranged form the texture image. The afterimage phenomenon shown in fig. 3B may occur when the light source is turned on in a time-sharing manner, which may cause inaccurate fingerprint detection.
It should be noted that, as shown in fig. 1, since the operator has ridges 141 and valleys 142 on the textured surface 14, and the light reflected at the ridges 141 and the light reflected at the valleys 142 have different intensities, the light intensity detected by the image sensor 13 receiving the light reflected at the ridges and the light intensity detected by the image sensor 13 receiving the light reflected at the valleys may be different, and thus, bright stripes and dark stripes in the imaged image may be caused.
The texture recognition module is further configured to, during texture acquisition, enable the plurality of electrochromic devices in the first electrochromic region to be in a light-blocking state to prevent light emitted from the light source and reflected by the texture from reaching the first non-imaging region, enable the electrochromic devices outside the first electrochromic region to be in a light-transmitting state to transmit light emitted from the light source and reflected by the texture, and enable the image sensor to receive the light transmitted by the electrochromic devices to obtain the first texture image.
In the process of grain collection, at the first moment, the plurality of electrochromic devices 12 in the first electrochromic region are in a light-shielding state, so that light emitted by the light source 11 and reflected by grains can be prevented from reaching the first non-imaging region, a highlight region in the first non-imaging region 21 is avoided, and the phenomenon of residual images generated by time-sharing lighting of the light source is eliminated. Meanwhile, the electrochromic device 12 located outside the first electrochromic region is in a light-transmitting state, light emitted from the light source 11 and reflected by the grain may be transmitted, and the image sensor 13 receives the light transmitted from the electrochromic device 12 to obtain a first grain image.
Fig. 4 is an imaged image 41 of the first light-emitting area at the first time in the present embodiment, where the imaged image 41 includes a fourth non-imaged area 411 and a fourth imaged area 412, and since the plurality of electrochromic devices 12 in the first electrochromic area are in the light-shielding state, the light emitted by the light source 11 and reflected by the texture is prevented from reaching the first non-imaged area, so that the fourth non-imaged area 411 is black, the fourth imaged area 412 includes second light stripes 413 and second dark stripes 414 which are alternately arranged, and the second light stripes 413 and the second dark stripes 414 which are alternately arranged constitute the texture image. Fig. 5 is a first texture image 51 that can be obtained from the imaging image 41, and as shown in fig. 6, a large-area texture image 61 can be obtained by stitching the first texture image 51 with texture images obtained at other times.
In this embodiment, since the electrochromic device array is located between the light source array and the image sensor array, and in the process of texture collection, when the plurality of light sources in the first light-emitting region emit light at the first time to perform texture collection, the plurality of electrochromic devices in the first electrochromic region are in a light-blocking state to prevent light emitted from the light sources and reflected by the textures from reaching the first non-imaging region, and the electrochromic devices outside the first electrochromic region are in a light-transmitting state to transmit the light emitted from the light sources and reflected by the textures, so that the image sensor receives the light transmitted from the electrochromic devices to obtain the first texture image, in this way, in the process of texture collection, the first electrochromic region prevents the light emitted from the light sources from reaching the first non-imaging region at the first time, and an image sticking phenomenon that may occur when the light sources are lit at different times can be eliminated.
In this embodiment, the above texture recognition module is further configured to emit light from the plurality of light sources in the second light emitting region at the second time during texture collection, so as to serve as a photosensitive light source of the image sensor array. The second moment is different from the first moment, the shape of a second light emitting area is the same as that of the first light emitting area, the second light emitting area is overlapped with the first light emitting area, an imaging image of the second light emitting area comprises a second non-imaging area and a second imaging area, the second imaging area is used for acquiring a second texture image, and the second imaging area is overlapped with the first non-imaging area. Because the second imaging area is overlapped with the first non-imaging area, the large-area texture images with continuous bright stripes and continuous dark stripes can be obtained after the first texture images and the second texture images are spliced.
In the present embodiment, the shape of the first light emitting region may be a rectangle, but is not limited thereto. The length and width of the first light-emitting region may be determined as desired. The shape of the second light emitting region may be rectangular, but is not limited thereto. The length and width of the second light emitting region can be determined according to requirements.
The invention further provides a line identification module. In the present embodiment, as shown in fig. 7, the electrochromic device 12 includes: a first transparent electrode 121, an electrochromic layer 122, an ion conductor layer 123, an ion storage layer 124, and a second transparent electrode 125. The second transparent electrode 125 is located at a side close to the image sensor array, the ion storage layer 124 is located on the second transparent electrode 125, the ion conductor layer 123 is located on the ion storage layer 124, the electrochromic layer 122 is located on the ion conductor layer 123, and the first transparent electrode 121 is located on the electrochromic layer 122. The material of the electrochromic layer can be tungsten trioxide, molybdenum trioxide or titanium dioxide. The electrochromic layer can be prepared by a resistive thermal evaporation method or a reactive magnetron sputtering method.
When a forward direct current voltage is applied between the first transparent electrode 121 and the second transparent electrode 125, the ions in the ion storage layer 124 are extracted, and after the ions enter the electrochromic layer 122 through the ion conductor layer 123, the electrochromic layer 122 changes color and absorbs light emitted from the light source 11 and reflected to the electrochromic layer 122 through textures, and the electrochromic device 12 is in a light-shielding state. When a reverse direct current voltage is applied between the first transparent electrode 121 and the second transparent electrode 125, ions in the electrochromic layer 122 are extracted and enter the ion storage layer 124 through the ion conductor layer 123, the electrochromic layer 122 is discolored to a light-transmitting state, and the electrochromic device 12 is in a light-transmitting state.
At a first timing, a forward direct current voltage is applied between the first transparent electrode 121 and the second transparent electrode 125 of the plurality of electrochromic devices 12 in the first electrochromic region to bring the electrochromic devices 12 into a light-blocking state, and a reverse direct current voltage is applied between the first transparent electrode 121 and the second transparent electrode 125 of the electrochromic devices 12 located outside the first electrochromic region to bring the electrochromic devices 12 into a light-transmitting state.
In the present embodiment, when the electrochromic device 12 is in the light-transmitting state, the light transmittance of the electrochromic device 12 is greater than or equal to 90%, and when the electrochromic device 12 is in the light-shielding state, the light transmittance of the electrochromic device 12 is less than or equal to 1%.
The invention further provides a line identification module. In this embodiment, as shown in fig. 1, the above-mentioned grain identification module further includes a display panel 15, where the display panel 15 includes a pixel unit array, and the pixel unit array includes a plurality of pixel units. The light source array includes the pixel unit array, and the plurality of light sources includes a plurality of pixel units. In other words, one light source includes at least one pixel unit. The display panel 15 may be an OLED (organic light emitting diode) display panel, but is not limited thereto. In this embodiment, the above-mentioned grain identification module is configured to emit light by a plurality of pixel units in a first light-emitting area at a first time during the grain collection process, so as to serve as a photosensitive light source of the image sensor array.
In this embodiment, the display panel 15 includes a first substrate, a first driving circuit layer, an organic light emitting layer, a cathode layer, a first encapsulation layer, a polarizer, a transparent optical adhesive layer, and a glass cover plate, which are sequentially stacked from bottom to top.
In this embodiment, the image sensor array includes a second substrate, a second driving circuit layer, a photosensitive layer, and a second package layer, which are sequentially stacked from bottom to top. The photosensitive layer includes a PIN junction diode array. The PIN junction diode array includes a plurality of PIN junction diodes. The plurality of image sensors includes a plurality of PIN junction diodes.
In this embodiment, an electrochromic array is fixed on the surface of the display panel near the image sensor array. Of course, the electrochromic array may also be located on the image sensor array, with the electrochromic located on the surface of the image sensor near the light source. The electrochromic array may also be self-contained, with the electrochromic device being neither affixed to the back of the display panel nor on the surface of the light source.
In this embodiment, the grain recognition module further includes a linear polarizer, and the linear polarizer is located between the light source array and the electrochromic device array. The transmission direction of the linear polarizer is a first direction. As shown in fig. 8, the electrochromic device 12 includes: a third transparent electrode 126, a liquid crystal layer 127 and a fourth transparent electrode 128. The liquid crystal layer 127 is located between the third transparent electrode 126 and the fourth transparent electrode 128.
When no electric signal is applied between the third transparent electrode 126 and the fourth transparent electrode 128, the transmission direction of the liquid crystal layer 127 is the first direction, the transmission direction of the liquid crystal layer 127 is the same as the transmission direction of the linear polarizer, and the electrochromic device 12 is in a light-transmitting state. When an electrical signal is applied between the third transparent electrode 126 and the fourth transparent electrode 128, the transmission direction of the liquid crystal layer 127 is the second direction, the second direction is perpendicular to the first direction, the transmission direction of the liquid crystal layer 127 is perpendicular to the transmission direction of the linear polarizer, and the electrochromic device 12 is in a light-shielding state.
At a first time, an electrical signal is applied between the third transparent electrode 126 and the fourth transparent electrode 128 of the plurality of electrochromic devices 12 in the first electrochromic region to bring the electrochromic devices 12 into the light-blocking state, and no electrical signal is applied between the third transparent electrode 126 and the fourth transparent electrode 128 of the electrochromic devices 12 located outside the first electrochromic region to bring the electrochromic devices 12 into the light-transmitting state.
In this embodiment, the area of the first electrochromic region is greater than or equal to the area of the first light-emitting region and less than or equal to the area of the first non-image-forming region. Furthermore, a projection of the first light-emitting region on the second substrate falls within a projection of the first electrochromic region on the second substrate.
In this embodiment, the first non-imaging region is a circular region. The diameter of the circular area is calculated as follows:
D＝2*h 1 *m*tanα
wherein D is the diameter of the circular region, h 1 Is the distance between the upper surface of the organic light-emitting layer and the upper surface of the glass cover plate, m is the magnification of the fingerprint, and alpha is the total reflection angle of the glass cover plate. For example, α may be 42 degrees, but is not limited thereto. The angle of total reflection of the glass cover plate is related to the refractive index of the glass cover plate.
Wherein m is calculated as follows:
m＝(h+h 1 )/h 1
wherein h is the distance between the upper surface of the glass cover plate and the upper surface of the image sensor.
An embodiment of the present invention further provides a display device, as shown in fig. 9, including the texture recognition module and the controller 91 according to any of the above embodiments; the controller 91 is electrically connected to the light source array and the electrochromic device array, respectively. Specifically, the controller 91 is electrically connected to the light source 11 and the electrochromic device 12, respectively.
The controller 91 is configured to light up the plurality of light sources 11 in the first light-emitting area at a first time during the texture acquisition as photosensitive light sources of the image sensor array; the imaging image of the first luminous area comprises a first non-imaging area and a first imaging area; the first imaging area is used for acquiring a first texture image.
The controller 91 is further configured to control the plurality of electrochromic devices 12 in the first electrochromic region to be in a light-blocking state to prevent the light emitted from the light source 11 and reflected by the texture from reaching the first non-imaging region, and to control the electrochromic devices 12 located outside the first electrochromic region to be in a light-transmitting state to transmit the light emitted from the light source 11 and reflected by the texture, and the image sensor 13 receives the light transmitted from the electrochromic devices 12 to obtain the first texture image, during texture acquisition.
It should be noted that the position of the controller 91 is not limited to the position shown in fig. 9, and may be set according to actual requirements.
In this embodiment, because the electrochromic device array is located between the light source array and the image sensor array, and in the process of texture collection, when the plurality of light sources in the first light emitting area are lit at the first time to perform texture collection, the plurality of electrochromic devices in the first electrochromic region are in a light-blocking state to prevent light emitted from the light sources and reflected by the textures from reaching the first non-imaging area, and the electrochromic devices located outside the first electrochromic region are in a light-transmitting state to transmit the light emitted from the light sources and reflected by the textures, so that the image sensor receives the light transmitted from the electrochromic devices to obtain the first texture image.
The display device in this embodiment may be: any product or component with a display function, such as electronic paper, a mobile phone, a tablet computer, a television, a notebook computer, a digital photo frame, a navigator and the like.
It is noted that in the drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. Also, it will be understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element or intervening layers may also be present. In addition, it will be understood that when an element or layer is referred to as being "under" another element or layer, it can be directly under the other element or intervening layers or elements may also be present. In addition, it will also be understood that when a layer or element is referred to as being "between" two layers or elements, it can be the only layer between the two layers or elements, or more than one intermediate layer or element may also be present. Like reference numerals refer to like elements throughout.
In the present invention, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" means two or more unless explicitly defined otherwise.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements that have been described above and shown in the drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (10)
1. The utility model provides an adopt line identification module of mode of lighting up in timesharing which characterized in that includes: the device comprises a light source array, an electrochromic array and an image sensor array;
the electrochromic array is located between the light source array and the image sensor array; the light source array comprises a plurality of light sources, the electrochromic array comprises a plurality of electrochromic devices, and the image sensor array comprises a plurality of image sensors; the image sensor is configured to receive light emitted from the light source and reflected by the texture and transmitted to the image sensor by the electrochromic device for texture acquisition;
the texture recognition module is configured to emit light by a plurality of light sources in a first light emitting area at a first moment in a texture acquisition process to serve as photosensitive light sources of the image sensor array; the imaging image of the first luminous area comprises a first non-imaging area and a first imaging area; the first imaging area is used for acquiring a first texture image; and
in the process of texture collection, a plurality of electrochromics in the first electrochromism area are in a shading state to prevent light which is emitted by the light source and reflected through textures from reaching the first non-imaging area, the electrochromics outside the first electrochromism area are in a light transmitting state to transmit the light which is emitted by the light source and reflected through the textures, and the image sensor receives the light transmitted by the electrochromics to obtain the first texture image.
2. The texture recognition module of claim 1, wherein the electrochromic device comprises: the electrochromic device comprises a first transparent electrode, an electrochromic layer, an ion conductor layer, an ion storage layer and a second transparent electrode;
the second transparent electrode is positioned at one side close to the image sensor array, the ion storage layer is positioned on the second transparent electrode, the ion conductor layer is positioned on the ion storage layer, the electrochromic layer is positioned on the ion conductor layer, and the first transparent electrode is positioned on the electrochromic layer;
when a forward direct current voltage is applied between the first transparent electrode and the second transparent electrode, ions in the ion storage layer are extracted, after the ions enter the electrochromic layer through the ion conductor layer, the electrochromic layer changes color and absorbs light emitted from the light source and reflected to the electrochromic layer through grains, and the electrochromic device is in a light-shielding state;
when reverse direct-current voltage is applied between the first transparent electrode and the second transparent electrode, ions in the electrochromic layer are extracted and then enter the ion storage layer through the ion conductor layer, the electrochromic layer fades to a light-transmitting state, and the electrochromic device is in the light-transmitting state.
3. The texture recognition module of claim 2, wherein the electrochromic layer is tungsten trioxide, molybdenum trioxide, or titanium dioxide.
4. The texture recognition module of claim 1, further comprising a linear polarizer positioned between the array of light sources and the array of electrochromics; the transmission vibration direction of the linear polaroid is a first direction; the electrochromic device comprises: a third transparent electrode, a liquid crystal layer and a fourth transparent electrode; the liquid crystal layer is positioned between the third transparent electrode and the fourth transparent electrode;
when no electric signal is applied between the third transparent electrode and the fourth transparent electrode, the transmission direction of the liquid crystal layer is the first direction, and the electrochromic device is in a transmission state;
when an electric signal is applied between the third transparent electrode and the fourth transparent electrode, the transmission direction of the liquid crystal layer is a second direction, the second direction is perpendicular to the first direction, and the electrochromic device is in a shading state.
5. The texture recognition module of claim 1, wherein an area of the first electrochromic region is greater than or equal to an area of the first light-emitting region and less than or equal to an area of the first non-imaging region.
6. The module of claim 1, comprising a display panel, the display panel comprising a pixel cell array, the pixel cell array comprising a plurality of pixel cells; the light source array comprises the pixel unit array, and the plurality of light sources comprise a plurality of pixel units;
the texture recognition module is configured to emit light by a plurality of pixel units in a first light-emitting area at a first moment in the texture acquisition process so as to serve as a photosensitive light source of the image sensor array.
7. The texture recognition module of claim 6, wherein the electrochromic array is fixed to a surface of the display panel near the image sensor array, or wherein the electrochromic array is located on the image sensor array and the electrochromic is located on a surface of the image sensor near the light source.
8. The texture recognition module of claim 1, wherein the texture recognition module is further configured to illuminate the plurality of light sources in the second illumination zone at a second time during texture acquisition as light sensitive light sources for the image sensor array;
the second moment is different from the first moment, the second light emitting area is overlapped with the first light emitting area, and the imaged image of the second light emitting area comprises a second non-imaged area and a second imaged area; the second imaging area is used for acquiring a second texture image; the second imaging region overlaps the first non-imaging region.
9. The texture recognition module of claim 8, wherein the second light emitting region has a shape that is the same as the shape of the first light emitting region.
10. A display device comprising the texture recognition module of any one of claims 1 to 9 and a controller; the controller is electrically connected with the light source array and the electrochromic device array respectively;
the controller is configured to illuminate a plurality of light sources in a first light-emitting area at a first time during texture acquisition as photosensitive light sources of the image sensor array; the imaging image of the first luminous area comprises a first non-imaging area and a first imaging area; the first imaging area is used for acquiring a first texture image;
the controller is further configured to control the plurality of electrochromic devices in the first electrochromic region to be in a light-blocking state to prevent light emitted from the light source and reflected by the texture from reaching the first non-imaging region and to control the electrochromic devices outside the first electrochromic region to be in a light-transmitting state to transmit light emitted from the light source and reflected by the texture, and the image sensor receives the light transmitted from the electrochromic devices to obtain the first texture image, during texture acquisition.
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| US20220246695A1 (en) * | 2020-05-27 | 2022-08-04 | Boe Technology Group Co., Ltd. | Texture recognition apparatus and manufacturing method thereof |
| CN113836968A (en) * | 2020-06-23 | 2021-12-24 | 京东方科技集团股份有限公司 | Grain recognition device and electronic device |
| CN111863920B (en) * | 2020-07-29 | 2023-12-12 | 京东方科技集团股份有限公司 | Display panel and display device |
| CN114076576B (en) * | 2020-08-21 | 2023-11-21 | 深圳市万普拉斯科技有限公司 | Light emitter, camera module, electronic equipment and image three-dimensional information acquisition method |
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| CN106773219B (en) * | 2017-02-07 | 2019-11-05 | 京东方科技集团股份有限公司 | A kind of display device |
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