CN107967876B - Display unit and display screen - Google Patents
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- CN107967876B CN107967876B CN201610914795.6A CN201610914795A CN107967876B CN 107967876 B CN107967876 B CN 107967876B CN 201610914795 A CN201610914795 A CN 201610914795A CN 107967876 B CN107967876 B CN 107967876B
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- 239000000463 material Substances 0.000 claims abstract description 172
- 230000003287 optical effect Effects 0.000 claims abstract description 95
- 239000011800 void material Substances 0.000 claims description 10
- 230000001681 protective effect Effects 0.000 claims description 6
- 230000006870 function Effects 0.000 description 11
- 238000001514 detection method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 229920006395 saturated elastomer Polymers 0.000 description 4
- 230000002411 adverse Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000008447 perception Effects 0.000 description 3
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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
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1324—Sensors therefor by using geometrical optics, e.g. using prisms
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/40—OLEDs integrated with touch screens
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Abstract
A display unit and a display screen, the display unit includes: the RGB back plate is used for emitting color light, the surface of the RGB back plate for emitting the color light is a front surface, three light-emitting material layers which are sequentially arranged are arranged on the front surface of the RGB back plate, and the three light-emitting material layers are respectively used for emitting one of red light, green light and blue light; the upper cover plate is arranged opposite to the front face of the RGB back plate and is used for enabling the color light to penetrate and project to a finger to form reflected light with fingerprint information; the optical fingerprint sensor is positioned on the front surface of the RGB back plate and used for receiving reflected light with fingerprint information to acquire a fingerprint image; the protection well surrounds the optical fingerprint sensor and is used for preventing color light emitted by the RGB back plate 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 aims to provide a display unit and a display screen, which can realize the function of fingerprint image identification while realizing screen display and reduce the manufacturing cost.
To solve the above problems, the present invention provides a display unit including: the RGB back plate is used for emitting color light, the surface of the RGB back plate for emitting the color light is a front surface, three light-emitting material layers which are sequentially arranged are arranged on the front surface of the RGB back plate, and the three light-emitting material layers are respectively used for emitting one of red light, green light and blue light; the upper cover plate is arranged opposite to the front face of the RGB back plate and used for enabling the color light to penetrate and project to a finger to form reflected light with fingerprint information; the optical fingerprint sensor is positioned on the front surface of the RGB backboard and used for receiving the reflected light with the fingerprint information to acquire a fingerprint image; the protection well surrounds the optical fingerprint sensor and is used for preventing color light emitted by the RGB back plate from being projected to the optical fingerprint sensor.
Optionally, the thickness of the protection well is equal to the distance between the RGB back plate and the upper cover plate.
Optionally, the thickness of the protection well is smaller than the distance between the RGB backplate and the upper cover plate.
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 RGB back plate and the upper cover plate.
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 upper cover plate is a light-transmitting cover plate.
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 three light-emitting material layers are all strip-shaped and are arranged in parallel along the row direction.
Optionally, in the row direction, the three light emitting material layers are arranged in the following order: a red light emitting material layer, a green light emitting material layer, and a blue light emitting material layer; wherein the red light emitting material layer is used for emitting red light, the green light emitting material layer is used for emitting green light, and the blue light emitting material layer is used for emitting blue light.
Optionally, the three light emitting material layers have equal widths in the row direction.
Optionally, the front surface of the RGB backplane includes a light emitting area, the three light emitting material layers are located in the light emitting area, and a width of the light emitting area in a direction parallel to the column is a preset light emitting width; wherein the three layers of light emitting material have voids at column-wise ends within the light emitting region, and the optical fingerprint sensor is disposed at the voids.
Optionally, the three layers of light emitting material have the void at one end in the column direction; and the three layers of light-emitting material are flush with the light-emitting region boundary at the other end in the column direction.
Optionally, a width of any one of the light emitting material layers in the column direction is smaller than the preset light emitting width, and the light emitting material layer in the light emitting region has the gap at an end of the column direction.
Optionally, the width of the red light-emitting material layer in the column direction is smaller than the preset light-emitting width, and the optical fingerprint sensor is arranged at an end of the red light-emitting material layer in the column direction; alternatively, the width of the green light emitting material layer in the column direction is smaller than the preset light emitting width, and the optical fingerprint sensor is disposed at an end of the green light emitting material layer in the column direction.
Optionally, the width of any two adjacent light emitting material layers in the column direction is smaller than the preset light emitting width, and the two adjacent light emitting material layers in the light emitting region have the gap at the end of the column direction.
Optionally, the widths of the red light-emitting material layer and the green light-emitting material layer in the column direction are smaller than the preset light-emitting width, and the optical fingerprint sensor is disposed at the end portions of the red light-emitting material layer and the green light-emitting material layer in the column direction.
Optionally, the width of the green light-emitting material layer and the blue light-emitting material layer in the column direction is smaller than the preset light-emitting width, and the optical fingerprint sensor is disposed at the end of the green light-emitting material layer and the end of the blue light-emitting material layer in the column direction.
Optionally, the width of the three light emitting material layers in the column direction is smaller than the preset light emitting width, and the three light emitting material layers in the light emitting region have the gap at an end of the column direction.
Optionally, the RGB backplane is an OLED RGB backplane.
Optionally, the RGB backplane is a micro LED backplane.
The present invention also provides a display screen, comprising: comprising a plurality of the above display units.
Optionally, the plurality of display units are arranged in an array.
Optionally, the plurality of display units share one 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 an RGB (red, green and blue) backboard for emitting colored light, wherein three light-emitting material layers which are sequentially arranged are arranged on the front surface of the RGB backboard and are respectively used for emitting one of red light, green light and blue light; the upper cover plate is arranged opposite to the front face of the RGB back plate and used for enabling the color light to penetrate and project the color light to a finger to form reflected light with fingerprint information; the optical fingerprint sensor is positioned on the front surface of the RGB backboard and used for receiving the reflected light with the fingerprint information to acquire a fingerprint image; the protection well surrounds the optical fingerprint sensor and is used for preventing the color light emitted by the RGB back plate from being projected into the optical fingerprint sensor. The three light-emitting material layers emit one of red light, green light and blue light, so that the function of screen color display can be realized, the optical fingerprint sensor is integrated in the display unit, and the function of fingerprint image identification can also be realized.
Drawings
Fig. 1 is a schematic cross-sectional structure diagram of a display unit according to an embodiment of the present invention;
fig. 2 to fig. 6 are schematic diagrams illustrating various layout structures of RGB backplanes in a display unit according to an embodiment of the present invention;
fig. 7 is a schematic cross-sectional structure view of a display unit according to another embodiment of the 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 RGB back plate is used for emitting color light, the surface of the RGB back plate for emitting the color light is a front surface, three light-emitting material layers which are sequentially arranged are arranged on the front surface of the RGB back plate, and the three light-emitting material layers are respectively used for emitting one of red light, green light and blue light; the upper cover plate is arranged opposite to the front face of the RGB back plate and used for enabling the color light to penetrate and project to a finger to form reflected light with fingerprint information; the optical fingerprint sensor is positioned on the front surface of the RGB backboard and used for receiving the reflected light with the fingerprint information to acquire a fingerprint image; the protection well surrounds the optical fingerprint sensor and is used for preventing color light emitted by the RGB back plate from being projected to the optical fingerprint sensor.
The invention can realize the function of identifying the fingerprint image while realizing the function of screen display.
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 6 are schematic structural diagrams illustrating a display unit according to an embodiment of the present invention, where fig. 1 is a schematic cross-sectional structural diagram of the display unit according to the embodiment of the present invention, and fig. 2 to 6 are schematic structural diagrams of various layouts of the RGB backplane in fig. 1.
Referring to fig. 1 to 6, the display unit includes:
the back plate 101 comprises an RGB back plate 101 for emitting color light, wherein a surface of the RGB back plate for emitting color light is a front surface, three light emitting material layers are sequentially arranged on the front surface of the RGB back plate 101, and the three light emitting material layers are respectively used for emitting one of red light, green light and blue light;
the upper cover plate 104 is opposite to the front surface of the RGB rear panel 101, and the upper cover plate 104 is used for transmitting the color light and projecting the color light to a finger to form reflected light with fingerprint information;
the optical fingerprint sensor 102 is positioned on the front surface of the RGB back plate 101 and used for receiving the reflected light with the fingerprint information to acquire a fingerprint image;
a hollow ring-shaped protection well 103 is located on the front surface of the RGB back plate 101, and the protection well 103 surrounds the optical fingerprint sensor 102 and is used for blocking the colored light emitted by the RGB back plate 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 RGB backplane 101 is configured to emit colored light comprising red, green, and blue light. The front surface of the RGB backplane 101 has three light-emitting material layers arranged in sequence, the three light-emitting material layers are respectively used for emitting one of red light, green light and blue light, and the colors of the light emitted by the three light-emitting material layers are different from each other.
Correspondingly, the three light emitting material layers are a red light emitting material layer 11, a green light emitting material layer 12 and a blue light emitting material layer 13, respectively, wherein the light emitted from the red light emitting material layer 11 is red light, the light emitted from the green light emitting material layer 12 is green light, and the light emitted from the blue light emitting material layer 13 is blue light.
In this embodiment, the RGB backplane 101 is an OLED (Organic Light-Emitting Diode) RGB backplane. In other embodiments, the RGB backplane may also be a micro LED RGB backplane.
In this embodiment, the display unit is disposed on a display screen, and the display screen has a plurality of display units arranged in an array; and the three light-emitting material layers are all strip-shaped and are arranged in parallel along the row direction. Specifically, the red light emitting material layer 11, the green light emitting material layer 12, and the blue light emitting material layer 13 are all in a strip shape and are arranged in parallel along a row direction. In the row direction, the three light-emitting material layers are arranged in the following order: a red light emitting material layer 11, a green light emitting material layer 12, and a blue light emitting material layer 13. The three light-emitting material layers have equal widths in the row direction, that is, the red light-emitting material layer 11, the green light-emitting material layer 12, and the blue light-emitting material layer 13 have equal widths in the row direction.
It should be noted that, in other embodiments, the widths of the red light-emitting material layer, the green light-emitting material layer, and the blue light-emitting material layer in the row direction may also be different according to the requirements of the pixels of the display screen.
The RGB backplane 101 includes a light emitting area I, the three light emitting material layers are located in the light emitting area I, and a width of the light emitting area I in a direction parallel to the row is a preset light emitting width W. Wherein the three layers of light emitting material within the light emitting area I have voids (not labeled) at the ends of the columns and the optical fingerprint sensor 102 is disposed at the voids.
In this embodiment, if the number of optical fingerprint sensors 102 in the same display unit is 1, the three light-emitting material layers have the gap at one end in the column direction, so that the optical fingerprint sensor 102 is disposed at the gap, and the three light-emitting material layers are flush with the boundary of the light-emitting area I at the other end in the column direction.
In other embodiments, the three light-emitting material layers may have the gap at one end in the column direction, the three light-emitting material layers may have the gap at the other end in the column direction, and the optical fingerprint sensors may be disposed at both ends of the light-emitting region.
Specifically, the width of any one of the light-emitting material layers in the column direction is smaller than the preset light-emitting width W, and the light-emitting material layer has the void at the end of the column direction within the light-emitting region I.
Referring to fig. 2, fig. 2 is a schematic view of a layout structure of a first RGB backplane according to an embodiment of the present invention, a width of the red light-emitting material layer 11 in a column direction is smaller than the preset light-emitting width W, and the optical fingerprint sensor 102 is disposed at an end of the red light-emitting material layer 11 in the column direction.
In particular, the red luminescent material layer 11 has a void at an end of the column direction within the luminescent area I, where the optical fingerprint sensor 102 is arranged. It can also be considered that the optical fingerprint sensor 102 occupies a part of the spatial position of the red light emitting material layer 11 in this embodiment, compared to the conventional RGB backplane layout structure.
Since the human eye is sensitive to the perception of red light, even if the width of the red luminescent material layer 11 in the column direction is smaller than the width of the other luminescent material layers in the column direction, it causes less adverse effect on the perception of the color of the display unit by the user.
Referring to fig. 3, fig. 3 is a schematic view of a layout structure of a second RGB backplane according to an embodiment of the present invention, a width of the green luminescent material layer 12 in a column direction is smaller than the preset luminescent width W, and the optical fingerprint sensor is disposed at an end of the green luminescent material layer 12 in the column direction.
In particular, the green luminescent material layer 12 has a void at an end of the column direction within the luminescent area I, where the optical fingerprint sensor 102 is arranged. It can also be considered that the optical fingerprint sensor 102 in this embodiment occupies a part of the spatial position of the green luminescent material layer 12, compared to the conventional RGB backplane layout structure.
Since the human eye has a high sensitivity to green light, even if the width of the green light emitting material layer 12 in the column direction is smaller than those of the other light emitting material layers, the adverse effect on the user's perception of the color of the display unit is small.
It is also possible that the width of any two adjacent light-emitting material layers in the column direction is smaller than the preset light-emitting width W, and the two adjacent light-emitting material layers have the gap at the end in the column direction in the light-emitting region I.
Referring to fig. 4, fig. 4 is a schematic view of a layout structure of a third RGB backplane according to an embodiment of the present invention, a width of the red light-emitting material layer 11 and a width of the green light-emitting material layer 12 in a column direction are smaller than the predetermined light-emitting width W, and the optical fingerprint sensor 102 is disposed at an end of the red light-emitting material layer 11 and the end of the green light-emitting material layer 12 in the column direction.
In particular, the red light-emitting material layer 11 and the green light-emitting material layer 12 within the light-emitting area I have a void at the end of the column direction where the optical fingerprint sensor 102 is disposed. It can also be considered that the optical fingerprint sensor in this embodiment occupies a part of the spatial positions of the red luminescent material layer 11 and the green luminescent material layer 12, compared to the conventional RGB backplane layout structure.
Fig. 1 is a schematic cross-sectional view of a display unit corresponding to a third RGB backplane in an embodiment of the present invention.
Referring to fig. 5, fig. 5 is a schematic view of a layout structure of a fourth RGB backplane according to an embodiment of the present invention, wherein the widths of the green luminescent material layer 12 and the blue luminescent material layer 13 in the row direction are smaller than the preset luminescent width W, and the optical fingerprint sensor 102 is disposed at the end of the green luminescent material layer 12 and the blue luminescent material layer 13 in the row direction.
In particular, the green luminescent material layer 12 and the blue luminescent material layer 13 within the luminescent area I have a void at the end of the column direction where the optical fingerprint sensor 102 is disposed. It can also be considered that the optical fingerprint sensor 102 in this embodiment occupies a part of the spatial positions of the green luminescent material layer 12 and the blue luminescent material layer 13, compared to the conventional RGB backplane layout structure.
The width of the three light-emitting material layers in the column direction is smaller than the preset light-emitting width W, and the three light-emitting material layers in the light-emitting region I have the gap at the end in the column direction.
Referring to fig. 6, fig. 6 is a schematic view of a layout structure of a fifth RGB backplane according to an embodiment of the present invention, wherein widths of the red light-emitting material layer 11, the green light-emitting material layer 12, and the blue light-emitting material layer 13 in a column direction are smaller than the preset light-emitting width W, and the optical fingerprint sensor 102 is disposed at an end of the red light-emitting material layer 11, the green light-emitting material layer 1, and the blue light-emitting material layer 13 in the column direction.
In particular, the three layers of light-emitting material within the light-emitting area I have voids at the ends of the column, where the optical fingerprint sensor 102 is arranged. It can also be considered that the optical fingerprint sensor 102 in this embodiment occupies partial spatial positions of the red luminescent material layer 11, the green luminescent material layer 12 and the blue luminescent material layer 13, compared to the conventional RGB backplane layout structure.
The upper cover plate 104 provides protection for the RGB backplane 101, and the upper cover plate 104 also provides a contact interface for fingers. In this embodiment, the upper cover plate 104 is a light-transmitting cover plate.
The protection well 103 is used for preventing colored light on the side of the optical fingerprint sensor 102 from being projected onto the optical fingerprint sensor 102, thereby preventing the optical fingerprint sensor 102 from photosensitive saturation, and ensuring the optical fingerprint sensor 102 has the capability of recognizing fingerprint images.
In particular, since the optical fingerprint sensor 102 is adjacent to one or two or three adjacent luminescent material layers, if the protective well 103 does not have a blocking effect, light emitted from the luminescent material layers located at the side of the optical fingerprint sensor 102 is directly projected onto the optical fingerprint sensor 102, which easily causes the optical fingerprint sensor 102 to be saturated. The protection well 103 may block light emitted from the side light emitting material layer, so as to prevent the light from being projected onto the optical fingerprint sensor 102, thereby preventing the optical fingerprint sensor 102 from being saturated.
Furthermore, when the display unit is applied to a display screen, the reflected light with fingerprint information is projected into the protective well 103 and reaches the optical fingerprint sensor 102 via the protective well 103, so that the optical fingerprint sensor 102 has a requirement for an acceptable angle of reflected light with fingerprint information, for example, a fingerprint image located directly above the optical fingerprint sensor 102 can be recognized, but a fingerprint image located in another area is not recognized. Taking the display screen as a mobile phone display screen as an example, the display screen is provided with a first application icon and a second application icon, and the optical fingerprint sensor 102 in the display unit can be used for unlocking a first application program; when a finger is positioned on the first application icon, the optical fingerprint sensor 102 identifies a fingerprint image to unlock the first application; when the finger is positioned on the second application icon, the optical fingerprint sensor 102 does not unlock the first application.
The protective well 103 is a laminated structure, and includes a light-transmitting material layer and a light-shielding material layer located on a 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 103 is equal to the distance between the RGB backplate 101 and the upper cover plate 104. The protection well 103 has two opposite ends, one end of which is in contact with the front surface of the RGB backplane 101, and the other end of which is in contact with the upper cover plate 104. Therefore, the protection well 103 not only plays a role of preventing the optical fingerprint sensor 102 from being saturated by light, but also plays a role of a supporting column between the RGB back plate 101 and the upper cover plate 104, and provides a support between the RGB back plate 101 and the upper cover plate 104.
It should be noted that, in other embodiments, referring to fig. 7, fig. 7 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 103 is smaller than the distance between the RGB backplate 101 and the upper cover plate 104. The protection well 103 is a hollow annular column, and the ratio of the thickness H of the protection well 103 to the diameter D of the protection well 103 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 103 has a weak ability to block interfering light, and other light is projected onto the optical fingerprint sensor 102 (refer to fig. 4) in addition to the reflected light with fingerprint information, affecting the ability of the optical fingerprint sensor 102 to recognize a fingerprint image.
For this, when the thickness of the protection well 103 is smaller than the distance between the RGB backplate 101 and the upper cover plate 104, the protection well 103 is a hollow annular column, and the aspect ratio of the protection well 103 is 0.1 to 15.
Referring to fig. 7, when the thickness of the protection well 203 is less than the distance between the RGB back plate 201 and the upper cover plate 204, the display unit further includes: a support structure 209 located between the RGB backplate 201 and the upper cover plate 204, and a thickness of the support structure 209 is equal to a distance between the RGB backplate 201 and the upper cover plate 204. The support structure 209 functions to support the RGB backplate 201 and the upper cover plate 204; the material of the support structure 209 may be a light-transmitting material, and the material of the support structure 209 may also be a light-shielding material.
The display unit provided by the embodiment of the invention can realize color light display and also can provide a function of identifying fingerprint images. Specifically, with reference to fig. 1 and fig. 2, the method for implementing display and fingerprint identification by using the display unit includes:
obtaining a unit pixel including a red sub-pixel directly provided by the red light emitting material layer 11, a blue sub-pixel directly provided by the green light emitting material layer 12, and a green sub-pixel directly provided by the blue light emitting material layer 13, using the display unit;
the display unit is utilized to generate detection light, the detection light is reflected by a finger to form reflected light with fingerprint information after being projected to the finger on the display screen, and the reflected light is projected to the optical fingerprint sensor 102 through a cavity surrounded by the protection well 103 to acquire a fingerprint image of the finger.
The detection light may include red light emitted from the red light emitting material layer 11 on the front surface of the RGB backplane 101, and the red light is projected onto a finger on the display screen through the upper cover plate 104 and reflected by the finger to form reflected light with fingerprint information; the reflected light is projected onto the optical fingerprint sensor 102 via the cavity enclosed by the protection well 103 to acquire a fingerprint image of the finger.
The detection light may also include green light emitted from the green light emitting material layer 12 on the front surface of the RGB backplane 101, and the green light is projected onto a finger on the display screen through the upper cover plate 104, and the finger is reflected to form reflected light with fingerprint information; the reflected light is projected onto the optical fingerprint sensor 102 via the cavity enclosed by the protection well 103 to acquire a fingerprint image of the finger.
The detection light may further include blue light emitted from the blue light emitting material layer 13 on the front surface of the RGB backplane 101, and the blue light is projected onto a finger on the display screen through the upper cover plate 104, and the finger is reflected to form reflected light with fingerprint information; the reflected light is projected onto the optical fingerprint sensor 102 via the cavity enclosed by the protection well 103 to acquire a fingerprint image of the finger.
It should also be noted that the color of the reflected light with fingerprint information received by the optical fingerprint sensor 102 may be chosen appropriately to determine the emitted light formed by one or more of the red, green or blue 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 protection well 103 may not only prevent the optical fingerprint sensor 102 from being saturated by light, but also smoothly guide the reflected light with fingerprint information to the optical fingerprint sensor 102.
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. It should be noted that, considering the manufacturing process difficulty of the protection well and the RGB backplane, the same protection well spans 2 display units in the same column, the 2 display units share one protection well, and the same protection well surrounds the optical fingerprint sensors of the 2 display units.
It should be noted that, when 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 may share one protection well.
Because the optical fingerprint sensor is integrated on the RGB 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, and the user experience is improved. In addition, when the display unit provided by the invention is applied to a display screen, fingerprint unlocking of a single application program can be realized.
In addition, the problem that the optical fingerprint sensor needs backlight display is solved by utilizing the OLED self-luminous principle of the RGB back plate, and the fingerprint image can be acquired by utilizing the self-luminous function of the OLED pixels as detection light.
Meanwhile, the arrangement of the optical fingerprint sensor on the RGB backplane does not reduce the pixel density (PPI, Pixels Per inc) formed by the display unit, and does not increase the thickness of the display screen due to the arrangement of the optical fingerprint sensor.
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 (23)
1. A display unit, comprising:
the RGB back plate is used for emitting color light, the surface of the RGB back plate for emitting the color light is a front surface, three light-emitting material layers which are sequentially arranged are arranged on the front surface of the RGB back plate, and the three light-emitting material layers are respectively used for emitting one of red light, green light and blue light;
the upper cover plate is arranged opposite to the front face of the RGB back plate and used for enabling the color light to penetrate and project to a finger to form reflected light with fingerprint information;
the optical fingerprint sensor is positioned on the front surface of the RGB backboard and used for receiving the reflected light with the fingerprint information to acquire a fingerprint image;
the protection well surrounds the optical fingerprint sensor and is used for preventing the color light emitted by the RGB back plate 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 RGB backplane and the upper cover plate.
3. The display unit of claim 1, wherein a thickness of the protection well is less than a distance between the RGB backplane and the upper cover plate.
4. The display unit according to claim 3, wherein the protection well is a hollow annular column, a ratio of a thickness of the protection well to 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 3, wherein the display unit further comprises: and the thickness of the supporting structure is equal to the distance between the RGB back plate and the upper cover plate.
6. The display unit of claim 1, wherein the upper cover plate is a light transmissive cover plate.
7. The display unit of claim 1, wherein the display unit is disposed on a display screen having a plurality of display units arranged in an array; the three light-emitting material layers are all strip-shaped and are arranged in parallel along the row direction.
8. The display unit according to claim 7, wherein the three layers of light emitting material are arranged in the order of: a red light emitting material layer, a green light emitting material layer, and a blue light emitting material layer; wherein the red light emitting material layer is used for emitting red light, the green light emitting material layer is used for emitting green light, and the blue light emitting material layer is used for emitting blue light.
9. The display unit of claim 8, wherein the three layers of light emitting material are all equal in width in the row direction.
10. The display unit according to claim 7, wherein the front surface of the RGB backplane comprises a light-emitting area, the three light-emitting material layers are located in the light-emitting area, and the width of the light-emitting area in the direction parallel to the columns is a predetermined light-emitting width; wherein the three layers of light emitting material have voids at column-wise ends within the light emitting region, and the optical fingerprint sensor is disposed at the voids.
11. The display unit according to claim 10, wherein the three layers of light emitting material have the void at one end in a column direction; and the three layers of light-emitting material are flush with the light-emitting region boundary at the other end in the column direction.
12. The display unit according to claim 10, wherein a width of any one of the light emitting material layers in a column direction is smaller than the preset light emitting width, and the light emitting material layer has the void at an end in the column direction in the light emitting region.
13. The display unit of claim 12, wherein a width of the red light emitting material layer in the column direction is smaller than the preset light emitting width, the optical fingerprint sensor being disposed at an end of the red light emitting material layer in the column direction; alternatively, the width of the green light emitting material layer in the column direction is smaller than the preset light emitting width, and the optical fingerprint sensor is disposed at an end of the green light emitting material layer in the column direction.
14. The display unit according to claim 10, wherein a width of any adjacent two of the light emitting material layers in the column direction is smaller than the preset light emitting width, and the two adjacent light emitting material layers in the light emitting region have the void at an end in the column direction.
15. The display unit of claim 14, wherein a width of the red and green emitting material layers in the column direction is less than the preset emitting width, and the optical fingerprint sensor is disposed at an end of the red and green emitting material layers in the column direction.
16. The display unit of claim 14, wherein a width of the green and blue light emitting material layers in a column direction is less than the preset light emission width, and the optical fingerprint sensor is disposed at an end of the green and blue light emitting material layers in the column direction.
17. The display unit according to claim 10, wherein a width of the three light emitting material layers in a column direction is smaller than the preset light emitting width, and the three light emitting material layers have the void at an end of the column direction in the light emitting region.
18. The display unit of claim 1, wherein the RGB backplane is an OLED RGB backplane.
19. The display unit of claim 1, wherein the RGB backplane is a micro LED RGB backplane.
20. A display screen, comprising:
comprising a number of display units according to any one of claims 1 to 19.
21. The display screen of claim 20, wherein the plurality of display units are arranged in an array.
22. The display screen of claim 20, wherein the plurality of display units share a protective well; the same protection well surrounds the optical fingerprint sensors of the plurality of display units.
23. The display screen of claim 22, 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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| CN201610914795.6A CN107967876B (en) | 2016-10-20 | 2016-10-20 | Display unit and display screen |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610914795.6A CN107967876B (en) | 2016-10-20 | 2016-10-20 | Display unit and display screen |
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| CN107967876A CN107967876A (en) | 2018-04-27 |
| CN107967876B true CN107967876B (en) | 2020-03-10 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108712526A (en) * | 2018-04-28 | 2018-10-26 | 维沃移动通信有限公司 | A kind of screen and mobile terminal |
| CN111448570B (en) * | 2018-08-07 | 2023-09-15 | 深圳市汇顶科技股份有限公司 | Optical sensing of fingerprints or other patterns on or near the display using an optical detector integrated into the display |
| WO2020073165A1 (en) * | 2018-10-08 | 2020-04-16 | 深圳市汇顶科技股份有限公司 | Fingerprint detection apparatus and method and electronic device |
| CN111627963B (en) * | 2020-05-19 | 2022-07-12 | 武汉华星光电半导体显示技术有限公司 | Pixel unit and display panel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040252867A1 (en) * | 2000-01-05 | 2004-12-16 | Je-Hsiung Lan | Biometric sensor |
| CN101814126B (en) * | 2009-02-25 | 2013-04-24 | 金佶科技股份有限公司 | Optical fingerprint identification system |
| US9465429B2 (en) * | 2013-06-03 | 2016-10-11 | Qualcomm Incorporated | In-cell multifunctional pixel and display |
| 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 | Back-transmission-reflection type pixel unit and flat-panel sensor |
| CN104035620B (en) * | 2014-06-20 | 2018-09-07 | 深圳印象认知技术有限公司 | Optical sensor key, touch screen, fingerprint collecting equipment, electronic equipment |
| CN104318199B (en) * | 2014-06-23 | 2020-03-24 | 上海箩箕技术有限公司 | Composite optical sensor and manufacturing method and using method thereof |
| 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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