CN107967870B - Display unit and display screen - Google Patents
Display unit and display screen Download PDFInfo
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- CN107967870B CN107967870B CN201610914803.7A CN201610914803A CN107967870B CN 107967870 B CN107967870 B CN 107967870B CN 201610914803 A CN201610914803 A CN 201610914803A CN 107967870 B CN107967870 B CN 107967870B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
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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
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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
- G06V40/1341—Sensing with light passing through the finger
Abstract
A display unit and a display screen, the display unit includes: the white light backboard is used for emitting white light, the surface of the white light backboard used for emitting the white light is the front surface, the optical fingerprint sensor is arranged on the front surface of the white light backboard, and the optical fingerprint sensor is used for receiving reflected light with fingerprint information to obtain a fingerprint image; the light filter is arranged opposite to the front face of the white light backboard and comprises a light leakage area and a plurality of sub-pixel layers which are arranged in parallel, wherein the light leakage area is opposite to the optical fingerprint sensor, and the colors of the sub-pixel layers are different; the protective well surrounds the optical fingerprint sensor and is used for preventing white light emitted by the white light backboard from being projected to the optical fingerprint sensor. The invention can realize the function of full-screen fingerprint image identification without increasing the screen occupation ratio of the display screen.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display unit and a display screen.
Background
Fingerprint recognition functions are gradually becoming a trend in electronic devices. The existing fingerprint identification module is usually an independent structure, which easily causes poor user experience when the fingerprint identification module is applied to an electronic device, for example, the fingerprint identification module is applied to the front of a mobile phone, so that the screen occupation ratio of the mobile phone is affected, and the fingerprint identification module is applied to the back of the mobile phone, so that the position is awkward and inconvenient to use.
When the fingerprint identification module is applied to an electronic device, the fingerprint identification module generally has an optical mode and a capacitive mode. The capacitance type electronic device mainly comprises a transparent net structure covered on the upper surface of a display screen of the electronic device, and fingerprint characteristic points of a person are judged in a capacitance induction mode to perform fingerprint image identification; the optical type mainly adopts a transparent image sensor attached to the surface of the display screen of the resistor device. In addition, for a transparent image sensor, the transparent image sensor itself needs to absorb a certain amount of light to obtain a fingerprint image, so that the transparent image sensor is difficult to be completely transparent, and meanwhile, the bonding of the image sensor and the display screen needs to avoid corresponding pixels, so that the input cost of bonding equipment is high.
Therefore, it is desirable to provide an optical fingerprint sensor disposed in a display screen of an electronic device, which can meet the requirement of collecting a fingerprint image on a full screen and reduce the manufacturing cost.
Disclosure of Invention
The invention solves the problem of providing a display unit and a display screen, which can realize screen display, can identify fingerprint images and reduce the manufacturing cost.
To solve the above problems, the present invention provides a display unit including: the white light backboard is used for emitting white light, the surface of the white light backboard used for emitting the white light is the front surface, the optical fingerprint sensor is arranged on the front surface of the white light backboard, and the optical fingerprint sensor is used for receiving reflected light with fingerprint information to obtain a fingerprint image; the light filter is arranged opposite to the front face of the white light backboard and comprises a light leakage area and a plurality of sub-pixel layers which are arranged in parallel, wherein the light leakage area is opposite to the optical fingerprint sensor, and the colors of the sub-pixel layers are different; the protective well surrounds the optical fingerprint sensor and is used for preventing white light emitted by the white light backboard from being projected to the optical fingerprint sensor.
Optionally, the thickness of the protection well is equal to the distance between the white back plate and the optical filter.
Optionally, the thickness of the protection well is smaller than the distance between the white back plate and the optical filter.
Optionally, the protection well is a hollow annular column, a ratio of the thickness of the protection well to the diameter of the protection well is an aspect ratio, and the aspect ratio is 0.1-15.
Optionally, the display unit further includes: and the thickness of the supporting structure is equal to the distance between the white light backboard and the optical filter.
Optionally, the protection well is of a laminated structure, and includes a light-transmitting material layer and a light-shielding material layer located on a side wall of the light-transmitting material layer, wherein the light-transmitting material layer surrounds the optical fingerprint sensor.
Optionally, the optical filter is a three-color optical filter or a four-color optical filter.
Optionally, the display unit is disposed on a display screen, and the display screen has a plurality of display units arranged in an array; the optical filter is an RGB optical filter.
Optionally, the plurality of sub-pixel layers include a red sub-pixel layer, a blue sub-pixel layer, and a green sub-pixel layer; the red sub-pixel layer, the blue sub-pixel layer, the green sub-pixel layer and the light leakage region are all in a strip shape and are arranged in parallel along the row direction.
Optionally, the areas of the red sub-pixel layer, the blue sub-pixel layer, the green sub-pixel layer and the light leakage region are all equal.
Optionally, the light leakage region is located at one side of the plurality of sub-pixel layers.
Optionally, in the row direction, the arrangement order of the red sub-pixel layer, the blue sub-pixel layer, the green sub-pixel layer, and the light leakage region is: the light source comprises a red sub-pixel layer, a green sub-pixel layer, a blue sub-pixel layer and a light leakage region; or a light leakage region, a red sub-pixel layer, a green sub-pixel layer and a blue sub-pixel layer.
Optionally, the light leakage region is located between two adjacent sub-pixel layers.
Optionally, the light leakage region is located between the red sub-pixel layer and the green sub-pixel layer; alternatively, the light leakage region is located between the green sub-pixel layer and the blue sub-pixel layer.
Optionally, the display unit is disposed on a display screen, and the display screen has a plurality of display units arranged in an array; the filter is a CMYK filter.
Optionally, the plurality of sub-pixel layers include a cyan sub-pixel layer, a magenta sub-pixel layer, a yellow sub-pixel layer, and a black sub-pixel layer; the cyan sub-pixel layer, the magenta sub-pixel layer, the yellow sub-pixel layer, the black sub-pixel layer and the light leakage region are all in a strip shape and are arranged in parallel along the row direction.
Optionally, the areas of the cyan sub-pixel layer, the magenta sub-pixel layer, the yellow sub-pixel layer, the black sub-pixel layer and the light leakage region are all equal.
Optionally, the light leakage region is located at one side of the plurality of sub-pixel layers; or the light leakage area is positioned between two adjacent sub-pixel layers.
Optionally, the optical filter includes a light-transmitting substrate and a black matrix pattern layer on the light-transmitting substrate, where the black matrix pattern layer includes a plurality of black matrices distributed at intervals; each sub-pixel layer is arranged between the adjacent black matrixes, and the light leakage area penetrates through the adjacent black matrixes.
Optionally, the white light backplane is an OLED white light backplane.
Optionally, the white light back plate is a micro LED white light back plate.
The invention also provides a display screen which comprises a plurality of display units.
Optionally, the plurality of display units are arranged in an array.
Optionally, a plurality of the display units share a protection well; the same protection well surrounds the optical fingerprint sensors of the plurality of display units.
Optionally, the display units are located on at least one column of the full screen of the display screen; some or all of the display units in the column share a single protection well.
Compared with the prior art, the technical scheme of the invention has the following advantages:
the technical scheme of the display unit provided by the invention comprises a white light backboard for emitting white light, wherein the surface of the white light backboard for emitting the white light is the front surface, the front surface of the white light backboard is provided with an optical fingerprint sensor, and the optical fingerprint sensor is used for receiving reflected light with fingerprint information to obtain a fingerprint image; the light filter is arranged opposite to the front face of the white light backboard and comprises a light leakage area and a plurality of sub-pixel layers which are arranged in parallel, wherein the light leakage area is opposite to the optical fingerprint sensor, and the colors of the sub-pixel layers are different; the protective well surrounds the optical fingerprint sensor and is used for preventing white light emitted by the white light backboard from being projected to the optical fingerprint sensor. The optical fingerprint sensor is integrated in the display unit, so that the display unit can realize the display function and the fingerprint image recognition function.
Drawings
Fig. 1 is a schematic cross-sectional structure diagram of a display unit according to an embodiment of the present invention;
FIG. 2 is a schematic view of a layout structure of the white light backplane of FIG. 1;
FIG. 3 is a schematic diagram of the layout structure of the filter shown in FIG. 1;
fig. 4 is a schematic cross-sectional structure diagram of a display unit according to another embodiment of the invention;
fig. 5 is a schematic cross-sectional view illustrating a display unit according to another embodiment of the present invention;
FIG. 6 is a schematic view of a layout structure of the white light backplane of FIG. 5;
FIG. 7 is a schematic diagram of the layout structure of the filter shown in FIG. 5;
FIG. 8 is a schematic cross-sectional view illustrating a display unit according to still another embodiment of the present invention;
FIG. 9 is a schematic view of a layout structure of the white light backplane of FIG. 8;
FIG. 10 is a schematic diagram of the layout structure of the filter shown in FIG. 8;
fig. 11 is a schematic layout structure diagram of a display screen according to an embodiment of the present invention.
Detailed Description
As can be seen from the background art, there is a need in the prior art to provide a method for placing an optical fingerprint sensor in a display screen, which can not only meet the requirement of collecting fingerprints on a full screen, but also reduce the manufacturing cost.
To solve the above problems, the present invention provides a display unit including: the white light backboard is used for emitting white light, the surface of the white light backboard used for emitting the white light is the front surface, the optical fingerprint sensor is arranged on the front surface of the white light backboard, and the optical fingerprint sensor is used for receiving reflected light with fingerprint information to obtain a fingerprint image; the light filter is arranged opposite to the front face of the white light backboard and comprises a light leakage area and a plurality of sub-pixel layers which are arranged in parallel, wherein the light leakage area is opposite to the optical fingerprint sensor, and the colors of the sub-pixel layers are different; the protective well surrounds the optical fingerprint sensor and is used for preventing white light emitted by the white light backboard from being projected to the optical fingerprint sensor.
The display unit provided by the invention can realize color display and fingerprint image identification.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Fig. 1 to 3 are schematic structural diagrams of a display unit according to an embodiment of the present invention, fig. 1 is a schematic cross-sectional structural diagram of the display unit according to the embodiment of the present invention, fig. 2 is a schematic layout structure of the white back plate in fig. 1, and fig. 3 is a schematic layout structure of the optical filter in fig. 1.
Referring to fig. 1 to 3, the display unit includes:
the white light backboard 101 is used for emitting white light, the surface of the white light backboard 101 used for emitting the white light is a front surface (not marked), the front surface of the white light backboard 101 is provided with an optical fingerprint sensor 102, and the optical fingerprint sensor 102 is used for receiving reflected light with fingerprint information to acquire a fingerprint image;
the filter 103 is arranged opposite to the front surface of the white back plate 101, the filter 103 comprises a light leakage region 107 and a plurality of sub-pixel layers arranged in parallel, wherein the light leakage region 107 is opposite to the optical fingerprint sensor 102, and the colors of the sub-pixel layers are different;
a hollow ring-shaped protection well 108 located on the front surface of the white light backplane 101, wherein the protection well 108 surrounds the optical fingerprint sensor 102 for blocking the white light emitted from the white light backplane 101 from being projected to the optical fingerprint sensor 102.
The display unit provided in the present embodiment will be described in detail below with reference to the accompanying drawings.
The optical filter 103 is a three-color filter or a four-color filter. In this embodiment, the filter 103 is a three-color filter, and the filter 103 is an RGB filter. The plurality of sub-pixel layers includes a red sub-pixel layer 104, a blue sub-pixel layer 105, and a green sub-pixel layer 106.
It should be noted that, in other embodiments, the filter may also be other three-color filters.
The white back plate 101 is used for emitting white light. In this embodiment, according to the corresponding relationship between the white light emitted from the white light back panel 101 and the sub-pixel layers in the optical filter 103, the white light emitted from the white light back panel 101 is divided into three white sub-pixels 10, and the three white sub-pixels 10 are in one-to-one correspondence with the positions of the red sub-pixel layer 104, the blue sub-pixel layer 105, and the green sub-pixel layer 106, so that the white light emitted from the three white sub-pixels 10 is respectively projected onto one of the red sub-pixel layer 104, the blue sub-pixel layer 105, and the green sub-pixel layer 106.
Specifically, the white light emitted from the white back panel 101 is projected to the red sub-pixel layer 104, and emits red light after passing through the red sub-pixel layer 104; the white light emitted from the white back panel 101 is projected to the blue sub-pixel layer 105, and emits blue light after passing through the green sub-pixel layer 105; the white light emitted from the white back plate 101 is projected to the green sub-pixel layer 106, and then emits green light after passing through the green sub-pixel layer 106.
In this embodiment, the white back panel 101 is an OLED (Organic Light-Emitting Diode) white back panel. In other embodiments, the white back plate may also be a micro LED white back plate.
The optical fingerprint sensor 102 on the white back plate 101 is used for acquiring a fingerprint image, and the position of the optical fingerprint sensor 102 is opposite to the position of the light leakage area 107 in the optical filter 103, so that the reflected light with fingerprint information can be projected onto the optical fingerprint sensor 102 through the light leakage area 107.
The protection well 108 is used to prevent white light from the side of the optical fingerprint sensor 102 from being projected onto the optical fingerprint sensor 102, so as to prevent the optical fingerprint sensor 102 from being saturated by light, and ensure the optical fingerprint sensor 102 has the ability to recognize fingerprint images.
The protective well 108 is a laminated structure, and includes a light-transmitting material layer and a light-shielding material layer on the sidewall of the light-transmitting material layer, wherein the light-transmitting material layer surrounds the optical fingerprint sensor 102. The light blocking material layer can block light except for reflected light with fingerprint information, and prevent the light from being projected onto the optical fingerprint sensor 102, so that adverse effects of the light on the optical fingerprint sensor 102 are avoided.
In this embodiment, the thickness of the protection well 108 is equal to the distance between the white back plate 101 and the filter 103. The protection well 108 has two opposite ends, one end of which is in contact with the white back plate 101, and the other end of which is in contact with the optical filter 103. Therefore, the protection well 108 not only plays a role of preventing the optical fingerprint sensor 102 from being saturated by light, but also plays a role of a support column between the white back plate 101 and the optical filter 103, and provides support between the white back plate 101 and the optical filter 103.
In another embodiment, referring to fig. 4, fig. 4 is a schematic cross-sectional structure diagram of a display unit according to another embodiment of the present invention, and the thickness of the protection well 108 is smaller than the distance between the white back plate 101 and the filter 103. The guard well 108 is a hollow annular column, and the ratio between the thickness H of the guard well 108 and the diameter D of the guard well 108 is the aspect ratio. The aspect ratio should not be too small nor too large. If the aspect ratio is too small, the protective well 108 may have a weak ability to block interfering light, and in addition to the reflected light with fingerprint information, other light may be projected onto the optical fingerprint sensor 102, affecting the ability of the optical fingerprint sensor 102 to identify a fingerprint image.
Therefore, when the thickness of the protection well 108 is smaller than the distance between the white back plate 101 and the filter 103, the protection well 108 is a hollow annular column, and the aspect ratio of the protection well 108 is 0.1-15.
Referring to fig. 4, the display unit further includes: a supporting structure 109 located between the white back plate 101 and the filter 103, wherein the thickness of the supporting structure 109 is equal to the distance between the white back plate 101 and the filter 103. The supporting structure 109 plays a role of supporting the white back plate 101 and the optical filter 103; the material of the support structure 109 may be a light transmissive material.
The display unit is arranged on a display screen, and the display screen is provided with a plurality of display units which are arranged in an array manner; the red sub-pixel layer 104, the blue sub-pixel layer 105, the green sub-pixel layer 106 and the light leakage region 107 are all strip-shaped and are arranged in parallel along the row direction.
In this embodiment, the areas of the red sub-pixel layer 104, the blue sub-pixel layer 105, the green sub-pixel layer 106, and the light leakage region 107 are all equal.
In this embodiment, referring to fig. 3, the light leakage region 107 is located on one side of the plurality of sub-pixel layers.
The red sub-pixel layer 104, the blue sub-pixel layer 105, the green sub-pixel layer 106 and the light leakage region 107 are arranged in the following order: red subpixel layer 104, green subpixel layer 106, blue subpixel layer 105, and light leakage region 107. The red sub-pixel layer 104, the blue sub-pixel layer 105, the green sub-pixel layer 106 and the light leakage region 107 may be arranged in the following order: light leakage region 107, red sub-pixel layer 104, green sub-pixel layer 106, and blue sub-pixel layer 105.
Since the light leakage region 107 is located at one side of the pixel layer, the arrangement of each sub-pixel layer in the pixel layer can be the same as that in the prior art, and therefore, the driving circuit adopted correspondingly can also be the same as that provided in the prior art.
In this embodiment, the optical filter 103 includes a transparent substrate 11 and a black matrix pattern layer (not labeled) on the transparent substrate 11, where the black matrix pattern layer includes a plurality of black matrices 12 distributed at intervals; each sub-pixel layer is disposed between adjacent black matrixes 12, and the light leakage region 107 penetrates through the adjacent black matrixes. Specifically, the red sub-pixel layer 104, the blue sub-pixel layer 105, and the green sub-pixel layer 106 are disposed between the adjacent black matrices 12.
In the display unit provided by the embodiment, not only can color light display be realized, but also a function of identifying a fingerprint image can be provided. Specifically, with reference to fig. 1, the method for implementing display and fingerprint identification by using the display unit includes:
the display unit is used to obtain a pixel unit, which includes a red sub-pixel, a blue sub-pixel and a green sub-pixel, wherein the red sub-pixel is obtained by the white light emitted from the white back panel 101 via the red sub-pixel layer 104, the blue sub-pixel is obtained by the white light emitted from the white back panel 101 via the blue sub-pixel layer 105, and the green sub-pixel is obtained by the white light emitted from the white back panel 101 via the green sub-pixel layer 106.
The display unit is used for generating detection light, the detection light is projected to a finger on the display screen, then reflected light with fingerprint information is formed through reflection of the finger, and the reflected light is projected to the optical fingerprint sensor 102 through the light leakage area 107 so as to acquire a fingerprint image of the finger.
Wherein the detecting light comprises white light emitted by the white back plate 101; the white light is projected onto a finger placed on the display screen via the light leakage area 107.
The detection light may further include red light obtained after the white light emitted from the white back panel 101 passes through the red sub-pixel layer 105; the red light is projected via the light leakage area 107 onto a finger positioned on the display screen.
The detection light may further include blue light obtained after the white light emitted from the white back panel 101 passes through the blue sub-pixel layer 105; the blue light is projected via the light leakage area 107 onto a finger positioned on the display screen.
The detection light may also include green light obtained after the white light emitted from the white back panel 101 passes through the green sub-pixel layer 106; the green light is projected onto a finger on the display screen via the light leakage region 107.
It should be noted that the color of the reflected light with fingerprint information received by the optical fingerprint sensor 102 can be appropriately selected to determine the reflected light formed by one or more of white light, red light, blue light or green light as the detection light. For example, when the color of the reflected light with fingerprint information received by the optical fingerprint sensor 102 is red, the red light is the detection light; when the color of the reflected light with fingerprint information received by the optical fingerprint sensor 102 is blue, the blue light is the detection light.
The protective well 108 may not only prevent the optical fingerprint sensor 102 from being saturated, but also guide the reflected light with fingerprint information to the optical fingerprint sensor 102.
Fig. 5 to 7 are schematic structural diagrams of a display unit according to another embodiment of the present invention, where fig. 5 is a schematic cross-sectional structural diagram of a display unit according to another embodiment of the present invention, fig. 6 is a schematic layout structure of the white backplane in fig. 5, and fig. 7 is a schematic layout structure of the optical filter in fig. 5.
Referring to fig. 5 to 7, the display unit includes:
the white light backboard 201 is used for emitting white light, the surface of the white light backboard 201 used for emitting the white light is a front surface, the front surface of the white light backboard 201 is provided with an optical fingerprint sensor 202, and the optical fingerprint sensor 202 is used for receiving reflected light with fingerprint information to acquire a fingerprint image;
the optical filter 203 is arranged opposite to the front surface of the white back panel 201, and the optical filter 203 comprises an optical leakage region 207 and a plurality of sub-pixel layers arranged in parallel, wherein the optical leakage region 207 is opposite to the optical fingerprint sensor 202, and the colors of the plurality of sub-pixel layers are different;
a hollow ring-shaped protection well 208 located on the front surface of the white light backplate 201, wherein the protection well 208 surrounds the optical fingerprint sensor 202 for blocking the white light emitted from the white light backplate 201 from being projected to the optical fingerprint sensor 202.
The filter 203 is a three-color filter or a four-color filter. In this embodiment, the filter 203 is a three-color filter and the filter 203 is an RGB filter. The plurality of sub-pixel layers includes a red sub-pixel layer 204, a blue sub-pixel layer 205, and a green sub-pixel layer 206. The red sub-pixel layer 204, the blue sub-pixel layer 205, the green sub-pixel layer 206 and the light leakage region 207 are all strip-shaped and are arranged in parallel along the row direction.
The areas of the red sub-pixel layer 204, the blue sub-pixel layer 205, the green sub-pixel layer 206 and the light leakage region 207 are all equal.
Unlike the previous embodiment, in the present embodiment, the light leakage region 207 is located between two adjacent sub-pixel layers. For example, the light leakage region 207 may be located between the red subpixel layer 204 and the green subpixel layer 206; alternatively, the light leakage region 207 may be located between the green sub-pixel layer 206 and the blue sub-pixel layer 205.
Correspondingly, the white light backboard 201 comprises three white photon pixels 20, and the optical fingerprint sensor 201 is located between two adjacent white light subpixels 20, so that the optical fingerprint sensor 201 is opposite to the light leakage region 207.
The optical filter 203 comprises a transparent substrate 21 and a black matrix pattern layer (not labeled) on the transparent substrate 21, wherein the black matrix pattern layer comprises a plurality of black matrixes 22 distributed at intervals; the red sub-pixel layer 204, the blue sub-pixel layer 205 and the green sub-pixel layer 206 are disposed between the adjacent black matrixes 22, and the light leakage region 207 penetrates through the adjacent black matrixes 22.
Fig. 8 to 10 are schematic cross-sectional structures of a display unit according to still another embodiment of the present invention, fig. 9 is a schematic layout structure of the white back plate in fig. 8, and fig. 10 is a schematic layout structure of the optical filter in fig. 8.
Referring to fig. 8 to 10, the display unit includes:
the white light backboard 301 is used for emitting white light, the surface of the white light backboard 301 used for emitting the white light is a front surface, the front surface of the white light backboard 301 is provided with an optical fingerprint sensor 302, and the optical fingerprint sensor 302 is used for receiving reflected light with fingerprint information to obtain a fingerprint image;
the optical filter 303 is arranged opposite to the front surface of the white back plate 301, the optical filter 303 comprises an optical leakage region 307 and a plurality of sub-pixel layers arranged in parallel, wherein the optical leakage region 307 is opposite to the optical fingerprint sensor 302, and the colors of the plurality of sub-pixel layers are different;
the protective well 308 is located on the front surface of the white light backplane 301, and the protective well 308 surrounds the optical fingerprint sensor 302 and is used for blocking the white light emitted from the white light backplane 301 from being projected to the optical fingerprint sensor 302.
Unlike the previous embodiment, in the present embodiment, the filter 303 is a four-color filter, and the filter 203 is a CMYK filter, which will be described in detail below.
The display unit sets up on the display screen, have a plurality of display element that are array arrangement on the display screen. Wherein the plurality of sub-pixel layers includes a cyan sub-pixel layer 304, a magenta sub-pixel layer 305, a yellow sub-pixel layer 306, and a black sub-pixel layer 316; the cyan sub-pixel layer 304, the magenta sub-pixel layer 305, the yellow sub-pixel layer 306, the black sub-pixel layer 316, and the light leakage region 307 are all strip-shaped and arranged in parallel along the row direction.
In this embodiment, the areas of the cyan sub-pixel layer 304, the magenta sub-pixel layer 305, the yellow sub-pixel layer 306, the black sub-pixel layer 316, and the light leakage region 307 are all equal.
In this embodiment, the light leakage region 307 is located on one side of the plurality of sub-pixel layers as an example. Specifically, the light leakage region 307 may be located on one side of the cyan sub pixel layer 304, and the light leakage region 307 and the magenta sub pixel layer 305 are located on two opposite sides of the cyan sub pixel layer 304; alternatively, the light leakage region 307 may be located on one side of the black sub-pixel layer 316, and the light leakage region 307 and the yellow sub-pixel layer 306 are located on two opposite sides of the black sub-pixel layer 316.
It should be noted that, in other embodiments, the light leakage area may also be located between two adjacent word pixel layers.
Correspondingly, the white backplane 301 includes four white photonic pixels 30, and the four white photonic pixels 30 are in one-to-one correspondence with the cyan sub-pixel layer 304, the magenta sub-pixel layer 305, the yellow sub-pixel layer 306, and the black sub-pixel layer 316, so that the white light emitted by the four white photonic pixels 30 is respectively projected onto one of the sub-pixel layers.
Specifically, the white light emitted from the white sub-pixel 30 is projected to the cyan sub-pixel layer 304, and emits cyan light after passing through the cyan sub-pixel layer 304; the white light emitted from the white photonic pixel 30 is projected to the magenta subpixel layer 305, and passes through the magenta subpixel layer 305 to emit magenta light; the white light emitted from the white photonic pixel 30 is projected to the yellow sub-pixel layer 306, and then emits yellow light after passing through the yellow sub-pixel layer 306; the white light emitted from the white sub-pixel 30 is projected to the black sub-pixel layer 316, and then passes through the black sub-pixel layer 316 to emit black light.
In this embodiment, the white backplane 301 is an OLED (Organic Light-Emitting Diode) white backplane. In other embodiments, the white back plate may also be a micro LED white back plate.
The optical filter 303 includes a transparent substrate 31 and a black matrix pattern layer (not labeled) on the transparent substrate 31, where the black matrix pattern layer includes a plurality of black matrices 32 distributed at intervals; each sub-pixel layer is disposed between adjacent black matrixes 32, and the light leakage region 307 penetrates through the adjacent black matrixes. Specifically, the cyan sub-pixel layer 304, the magenta sub-pixel layer 305, the yellow sub-pixel layer 306, and the black sub-pixel layer 316 are disposed between the adjacent black matrices 32.
In the display unit provided by the embodiment, not only can color light display be realized, but also a function of identifying a fingerprint image can be provided. Specifically, with reference to fig. 8, the method for implementing display and fingerprint identification by using the display unit includes:
obtaining a pixel unit by using the display unit, wherein the pixel unit comprises a cyan sub-pixel, a magenta sub-pixel, a yellow sub-pixel and a black sub-pixel, the cyan sub-pixel is obtained by the white light emitted from the white backplane 301 via the cyan sub-pixel layer 304, the magenta sub-pixel is obtained by the white light emitted from the white backplane 301 via the magenta sub-pixel layer 305, the yellow sub-pixel is obtained by the white light emitted from the white backplane 301 via the yellow sub-pixel layer 306, and the black sub-pixel is obtained by the white light emitted from the white backplane 301 via the black sub-pixel layer 316;
the display unit is used to generate detection light, the detection light is projected to a finger on the display screen, and then reflected light with fingerprint information is formed by the reflection of the finger, and the reflected light is projected to the optical fingerprint sensor 302 through the light leakage region 307, so as to obtain a fingerprint image of the finger.
Wherein the detecting light comprises white light emitted from the white back plate 301; the white light is projected onto a finger placed on the display screen through the light leakage region 307.
The detection light may further include cyan light obtained after the white light emitted from the white back plane 301 passes through the cyan sub-pixel layer 304; the cyan light is projected onto a finger on the display screen through the light leakage region 307. The detection light may further include magenta light obtained by the white backplane 301 via the magenta sub-pixel layer 305; the magenta light is projected onto a finger on the display screen via the light leakage area 307.
The detection light may further include yellow light obtained after the white light emitted from the white back plate 301 passes through the yellow sub-pixel layer 306; the yellow light is projected onto a finger positioned on the display screen via the light leakage area 307. The detection light may further include black light obtained by the white backplane 301 via the black sub-pixel layer 316; the black light is projected onto a finger on the display screen through the light leakage region 307.
It should be noted that the extension of the reflected light with fingerprint information received by the optical fingerprint sensor 302 can be properly selected to determine the reflected light formed by one or more colors of white light, cyan light, magenta light, yellow light or black light as the detection light. For example, when the color of the reflected light with fingerprint information received by the optical fingerprint sensor 302 is cyan, the cyan light is the detection light; when the color of the reflected light with the fingerprint information received by the optical fingerprint sensor 302 is yellow, the yellow light is the detection light. The invention also provides a display screen which comprises a plurality of display units, so that the display screen realizes the functions of screen display and fingerprint identification, and the manufacturing cost of the display screen is low.
Specifically, the display units are arranged in an array manner, so that the requirement of collecting fingerprints on a full screen is met.
It should be noted that, in other embodiments, when the display screen only needs a partial area to implement the fingerprint identification function, only a partial area of the display screen may include the display unit.
The protection wells in several display units in the display screen may be independent of each other, i.e. each display unit has an independent protection well. The display units in the display screen can also share one protection well, the protection well spans the display units, and the same protection well surrounds the optical fingerprint sensors of the display units. For example, the protection well spans 5 display units located on the same column, and the 5 display units share the same protection well; or, the protection well spans 10 display units on the same column, and the 10 display units share the same protection well.
When the plurality of display units are positioned on at least one column of the full screen of the display screen, part or all of the display units on the column can share one protection well.
Fig. 11 is a schematic diagram showing a layout structure of a display panel, where the display panel 40 includes a plurality of the display units, each of which includes 3 white light sub-pixels (not labeled), and the display units include an optical fingerprint sensor 42 and a protection well 48; wherein the plurality of display units are located on at least one column of the full screen of the display screen 40, and some or all of the display units in the column share one protection well 48, that is, the same protection well 48 surrounds the optical fingerprint sensors 42 in some or all of the display units in the column.
In the left-to-right direction of fig. 11, all display units in the first column share a protective well 48, and the protective well 48 surrounds the optical fingerprint sensors 42 in all display units in the first column; the partial display units on the second column share a protective well 48, which protective well 48 surrounds the optical fingerprint sensor 42 in the partial display units on the second column. And all display units on the same column may also have mutually independent guard wells 48, each guard well 48 surrounding the optical fingerprint sensor 42 in a single display unit. Because the optical fingerprint sensor is integrated on the white light backboard, the influence of the optical fingerprint sensor on the screen occupation ratio of the display screen is small, so that the display screen has a larger screen occupation ratio, a terminal user can obtain a larger screen occupation ratio, and the user experience is improved. In addition, when the display unit provided by the invention is applied to a display screen, the fingerprint unlocking function of a single application program can be realized.
In addition, the OLED self-luminous principle of the white light backboard is utilized, the problem that the optical fingerprint sensor needs to be limited by backlight is solved, and the light emitted by the OLED pixels can be used as detection light to acquire a fingerprint image.
Meanwhile, the optical fingerprint sensor is arranged on the white light backboard, so that the pixel density (PPI, Pixel Per Inc) formed by a display unit cannot be reduced, the thickness of a display screen cannot be increased due to the arrangement of the optical fingerprint sensor, and the thickness of the display screen is thin.
And, set up the optical fingerprint sensor in the said display screen, make the security of using improve greatly. Taking a mobile phone as an example, even if the mobile phone is unlocked by a person, the application is difficult to open because the opening of the application needs fingerprint confirmation, the application unlocking fingerprint can be set to be different from the mobile phone unlocking fingerprint, and even confirmation of a plurality of fingers can be set, so that the use safety of the mobile phone is improved.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (24)
1. A display unit, comprising:
the white light backboard is used for emitting white light, the surface of the white light backboard used for emitting the white light is the front surface, the optical fingerprint sensor is arranged on the front surface of the white light backboard, and the optical fingerprint sensor is used for receiving reflected light with fingerprint information to obtain a fingerprint image;
the light filter is arranged opposite to the front face of the white light backboard and comprises a light leakage area and a plurality of sub-pixel layers which are arranged in parallel, wherein the light leakage area is opposite to the optical fingerprint sensor, and the colors of the sub-pixel layers are different;
the hollow annular protection well is positioned on the front surface of the white light backboard, surrounds the optical fingerprint sensor and is used for preventing white light emitted by the white light backboard from being projected to the optical fingerprint sensor;
the protection well is of a laminated structure and comprises a light-transmitting material layer and a shading material layer located on the side wall of the light-transmitting material layer, wherein the light-transmitting material layer surrounds the optical fingerprint sensor, and the shading material layer blocks light except reflected light with fingerprint information.
2. The display unit of claim 1, wherein a thickness of the protection well is equal to a distance between the white back plate and the filter.
3. The display unit of claim 1, wherein a thickness of the protection well is less than a distance between the white back plate and the filter.
4. The display unit according to claim 2, wherein the protection well is a hollow annular column, a ratio between a thickness of the protection well and a diameter of the protection well is an aspect ratio, and the aspect ratio is 0.1 to 15.
5. The display unit of claim 2, wherein the display unit further comprises: and the thickness of the supporting structure is equal to the distance between the white light backboard and the optical filter.
6. The display unit of claim 1, wherein the filter is a three-color filter or a four-color filter.
7. The display unit of claim 1 or 6, wherein the display unit is disposed on a display screen having a plurality of display units arranged in an array; the optical filter is an RGB optical filter.
8. The display unit of claim 7, wherein the plurality of sub-pixel layers comprises a red sub-pixel layer, a blue sub-pixel layer, and a green sub-pixel layer; the red sub-pixel layer, the blue sub-pixel layer, the green sub-pixel layer and the light leakage region are all in a strip shape and are arranged in parallel along the row direction.
9. The display unit of claim 8, wherein the areas of the red, blue, green and light leakage regions are all equal.
10. The display unit of claim 8, wherein the light leakage region is located on one side of the plurality of sub-pixel layers.
11. The display unit according to claim 10, wherein the red sub-pixel layer, the blue sub-pixel layer, the green sub-pixel layer, and the light leakage region are arranged in the order of: the light source comprises a red sub-pixel layer, a green sub-pixel layer, a blue sub-pixel layer and a light leakage region; or a light leakage region, a red sub-pixel layer, a green sub-pixel layer and a blue sub-pixel layer.
12. The display unit of claim 8, wherein the light leakage region is located between two adjacent subpixel layers.
13. The display unit of claim 12, wherein the light leakage region is located between the red subpixel layer and the green subpixel layer; alternatively, the light leakage region is located between the green sub-pixel layer and the blue sub-pixel layer.
14. The display unit of claim 1 or 6, wherein the display unit is disposed on a display screen having a plurality of display units arranged in an array; the filter is a CMYK filter.
15. The display unit of claim 14, wherein the plurality of sub-pixel layers comprises a cyan sub-pixel layer, a magenta sub-pixel layer, a yellow sub-pixel layer, and a black sub-pixel layer; the cyan sub-pixel layer, the magenta sub-pixel layer, the yellow sub-pixel layer, the black sub-pixel layer and the light leakage region are all in a strip shape and are arranged in parallel along the row direction.
16. The display unit according to claim 15, wherein areas of the cyan sub-pixel layer, the magenta sub-pixel layer, the yellow sub-pixel layer, the black sub-pixel layer, and the light leakage region are all equal.
17. The display unit of claim 15, wherein the light leakage region is located on one side of the plurality of sub-pixel layers; or the light leakage area is positioned between two adjacent sub-pixel layers.
18. The display unit according to claim 1, wherein the filter comprises a light-transmitting substrate and a black matrix pattern layer on the light-transmitting substrate, the black matrix pattern layer comprises a plurality of black matrixes distributed at intervals;
each sub-pixel layer is arranged between the adjacent black matrixes, and the light leakage area penetrates through the adjacent black matrixes.
19. The display unit of claim 1, wherein the white light backplane is an OLED white light backplane.
20. The display unit of claim 1, wherein the white light backplane is a micro LED white light backplane.
21. A display screen, comprising:
comprising a plurality of display units according to any one of claims 1 to 20.
22. The display screen of claim 21, wherein the plurality of display units are arranged in an array.
23. The display screen of claim 21 wherein a plurality of the display units share a protective well; the same protection well surrounds the optical fingerprint sensors of the plurality of display units.
24. The display screen of claim 23, wherein the plurality of display units are located in at least one column of the full screen of the display screen; some or all of the display units in the column share a single protection well.
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| CN201610914803.7A CN107967870B (en) | 2016-10-20 | 2016-10-20 | Display unit and display screen |
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| CN108761911A (en) * | 2018-05-29 | 2018-11-06 | Oppo（重庆）智能科技有限公司 | Display module and electronic equipment |
| CN109541857A (en) * | 2018-12-28 | 2019-03-29 | 厦门天马微电子有限公司 | Display panel and preparation method thereof, display device |
| CN109709701A (en) * | 2019-01-16 | 2019-05-03 | 柳州阜民科技有限公司 | A kind of display device and the electronic equipment using the display device |
| CN110412794B (en) * | 2019-08-01 | 2022-05-27 | 京东方科技集团股份有限公司 | Display substrate and display panel |
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| CN101814126B (en) * | 2009-02-25 | 2013-04-24 | 金佶科技股份有限公司 | Optical fingerprint identification system |
| US9798372B2 (en) * | 2013-06-03 | 2017-10-24 | Qualcomm Incorporated | Devices and methods of sensing combined ultrasonic and infrared signal |
| KR101376227B1 (en) * | 2013-09-17 | 2014-03-25 | 실리콘 디스플레이 (주) | Optical fingerprint sensor |
| CN103928477B (en) * | 2013-12-20 | 2017-07-14 | 上海天马微电子有限公司 | One kind back of the body transflective pixel unit and flat panel sensor |
| CN204856529U (en) * | 2015-07-06 | 2015-12-09 | 上海箩箕技术有限公司 | Optical profile type fingerprint imaging system |
| CN104992157A (en) * | 2015-07-08 | 2015-10-21 | 上海箩箕技术有限公司 | Fingerprint imaging module group and manufacturing method thereof |
| CN105678255B (en) * | 2016-01-04 | 2019-01-08 | 京东方科技集团股份有限公司 | A kind of optical fingerprint identification display screen and display device |
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