CN114740994B - Display screen and display device - Google Patents
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- CN114740994B CN114740994B CN202210307367.2A CN202210307367A CN114740994B CN 114740994 B CN114740994 B CN 114740994B CN 202210307367 A CN202210307367 A CN 202210307367A CN 114740994 B CN114740994 B CN 114740994B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
- G06F3/04186—Touch location disambiguation
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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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/552—Protection against radiation, e.g. light or electromagnetic waves
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
- H01L25/16—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof the devices being of types provided for in two or more different main groups of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. forming hybrid circuits
- H01L25/167—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof the devices being of types provided for in two or more different main groups of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. forming hybrid circuits comprising optoelectronic devices, e.g. LED, photodiodes
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Theoretical Computer Science (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Computer Hardware Design (AREA)
- Power Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
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- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The embodiment of the invention provides a display screen and a display device, comprising: the display area and a non-display area at least partially surrounding the display area, and at least part of the display area is a photosensitive detection area; the display area comprises a plurality of display light-emitting units, at least one infrared light-emitting unit and at least one infrared light sensing unit which are arranged in an array manner; in the light emitting direction of the display screen, the display light emitting unit and the infrared light sensing unit are positioned at different film heights and are not overlapped; a visible light shielding structure located between the display light emitting unit and the infrared light sensing unit. The embodiment of the invention can reduce the adverse effect of the light emitted by the display light-emitting unit on the infrared light sensing unit and improve the accuracy of infrared light gesture recognition and sensing.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display screen and a display device.
Background
With the development of display technology, light sensation recognition functions are integrated in more and more display screens, so that the integration level of the display screens is improved, and user experience is improved. The infrared light sensing gesture recognition is to integrate photosensitive elements on a panel to realize gesture recognition and touch control functions within a certain distance, and the infrared light sensing recognition is not interfered by current, voltage and static electricity, so that the infrared light sensing gesture recognition can be used in severe environments, and is widely applied to electronic equipment such as mobile phones, tablet computers and the like.
Specifically, when the sensing body such as a finger performs a sensing action, an infrared light emitted by the infrared light source is received by the photosensitive element after being reflected by the finger, and the photosensitive element performs photoelectric conversion on the received reflected light to form a current/voltage signal, so that detection and positioning of a touch action of a user are realized according to the current signal or the voltage signal.
However, in the existing design, an infrared light source, a display pixel unit and a photosensitive element are arranged on the same layer in a display screen panel, and light refraction interference among various light-emitting units exists, for example, visible light rays emitted by the display pixel unit in the display screen can sense the photosensitive element to cause noise interference, so that the accuracy of infrared light photosensitive gesture recognition is reduced.
Disclosure of Invention
The invention provides a display screen and a display device, which can reduce the adverse effect of light rays emitted by a display light-emitting unit on an infrared light sensing unit and improve the accuracy of infrared light gesture recognition and sensing.
In a first aspect, a display screen includes:
A display region and a non-display region at least partially surrounding the display region; at least part of the display area is a photosensitive detection area;
the display area comprises a plurality of display light-emitting units, at least one infrared light-emitting unit and at least one infrared light sensing unit which are arranged in an array manner;
In the light emitting direction of the display screen, the display light emitting unit and the infrared light sensing unit are positioned at different film heights and are not overlapped;
A visible light shielding structure located between the display light emitting unit and the infrared light sensing unit. In a second aspect, the present application also provides a display device comprising the display screen described above.
Compared with the prior art, the display screen and the display device provided by the invention have the advantages that at least the following effects are realized:
The display screen and the display device provided by the invention comprise a plurality of display light-emitting units, at least one infrared light-emitting unit and at least one infrared light sensing unit which are arranged in an array manner; the display luminous unit is used for providing visible light required by picture display, the infrared luminous unit is used for emitting detection light which can be sensed and reflected by fingers, the infrared light sensing unit is used for carrying out photoelectric conversion on the received detection light to form a current/voltage signal, the sensed signal is transmitted to the chip processing system, and the IC is used for detecting and positioning actions according to the current signal or the voltage signal, so that the infrared light gesture recognition function of the display screen is realized. In the direction of the display screen light, the display light-emitting unit and the infrared light sensing unit are positioned at different film heights, because under normal conditions, on the light-emitting surface of the display screen, the light-emitting angle of the display light-emitting unit is usually about 120 degrees, the different layers of the display light-emitting unit and the infrared light sensing unit are arranged, the angle range of the lateral visible light rays received by the adjacent infrared light sensing units is smaller, and the bottom noise interference of the visible light rays on the infrared light sensing units can be reduced. The visible light shielding structure is arranged between the display light-emitting unit and the infrared light sensing unit, so that visible light emitted by the display light-emitting unit can be further blocked from being sensed by the infrared light sensing unit after being reflected by fingers, and the accuracy of infrared light gesture recognition sensing is improved.
Of course, it is not necessary for any one product embodying the invention to achieve all of the technical effects described above at the same time.
Other features of the present invention and its advantages will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic structural diagram of a display screen according to an embodiment of the present application;
FIG. 2 is a cross-sectional view of an AA' of the display screen provided by the embodiment of FIG. 1;
FIG. 3 is a cross-sectional view of still another AA' of the display screen provided by the embodiment of FIG. 1;
FIG. 4 is a schematic diagram of a partial structure of a display screen according to an embodiment of the present application;
FIG. 5 is a schematic diagram of another display screen according to an embodiment of the present application;
FIG. 6 is a cross-sectional view of a BB' of the display screen provided by the embodiment of FIG. 5;
FIG. 7 is a schematic diagram of another display screen according to an embodiment of the present application;
FIG. 8 is a cross-sectional view of a display screen according to the embodiment of FIG. 7;
FIG. 9 is a schematic diagram of another display screen according to an embodiment of the present application;
FIG. 10 is a DD' section view of the display screen provided by the embodiment of FIG. 9;
FIG. 11 is a schematic diagram of another display screen according to an embodiment of the present application;
FIG. 12 is a schematic view of another structure of a display screen according to an embodiment of the present application;
FIG. 13 is a cross-sectional view of a QQ' of the display screen provided by the embodiment of FIG. 12;
FIG. 14 is a graph showing the transmittance test data of the stacked blue color resist 404 and red color resist 403;
Fig. 15 is a schematic view of another film structure of a display screen according to an embodiment of the present application;
fig. 16 is a schematic structural diagram of a display device according to an embodiment of the application.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
It should be understood that the described embodiments are merely some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
Fig. 1 is a schematic structural diagram of a display screen according to an embodiment of the present application, and fig. 2 is a cross-sectional view AA' of the display screen according to the embodiment of fig. 1. As shown in fig. 1-2, the present application provides a display screen 100 comprising: a display area AA and a non-display area NA at least partially surrounding the display area AA; at least the display area AA is a photosensitive detection area SA; the display area AA includes a plurality of display light emitting units 10, at least one infrared light emitting unit 20, and at least one infrared light sensing unit 30 arranged in an array;
In the light emitting direction Z of the display screen 100, the display light emitting unit 10 and the infrared light sensing unit 30 are positioned at different film heights and do not overlap; the display screen 100 further comprises a visible light shielding structure 40 located between the infrared light sensing units 30 of the display lighting unit 10.
Specifically, referring to fig. 1, the display screen 100 includes a display area AA and a non-display area NA at least partially surrounding the display area AA, wherein the display area AA includes a plurality of display light emitting units 10 arranged in an array along an X direction and a Y direction, which are perpendicular to a light emitting direction Z of the display screen 100, a plurality of infrared light emitting units 20 and a plurality of external light sensing units 30. It should be noted that, in the embodiment of the present invention, at least part of the display area AA of the display screen 100 is the photosensitive detection area SA, that is, when all the display areas AA of the display screen 100 are the photosensitive detection areas SA, a full-screen fingerprint identification or a spatial touch function can be implemented, as shown in fig. 1; Or a part of the display area AA of the display screen 100 is a photosensitive detection area SA, so as to realize the functions of fingerprint identification or gesture operation in a specific area. Furthermore, the orthographic projections of the plurality of infrared light emitting units 20 on the plane of the photosensitive detection area SA in the display screen 100 may be distributed on at least two opposite sides of the photosensitive detection area SA, that is, the plurality of infrared light emitting units 20 are oppositely disposed; or the orthographic projection of the plurality of infrared light emitting units 20 in the plane of the photosensitive detection area SA in the display screen 100 is located in the photosensitive detection area SA, as shown in fig. 1; the embodiment of the present invention is not particularly limited to the above-described case. Wherein, the display lighting unit 10 is used for providing visible light rays required by the picture display of the display screen 100; The infrared light emitting unit 20 is used for emitting detection light which can be sensed and reflected by a sensing body such as a finger; the infrared light sensing unit 30 performs photoelectric conversion on the received reflected detection light to form a current/voltage signal, and transmits the sensed signal to the chip processing system; and then the IC detects and positions the motion according to the current signal or the voltage signal, so that the infrared light sensation gesture recognition function of the display screen 100 is realized. Specifically, the infrared light sensing unit 30 may be a photodiode (e.g., avalanche photodiode, PIN photodiode, etc.) or other photosensitive sensor that may perform an infrared receiving function. In the light emitting direction Z of the display 100, as shown in fig. 2, the display light emitting unit 10 and the infrared light sensing unit 30 are located at different film heights and do not overlap; Normally, on the light emitting surface, the light emitting angle of the display light emitting unit 10 is usually about 120 degrees, and by arranging the different layers of the display light emitting unit 10 and the infrared sensing unit 30, at least part of visible light emitted laterally by the display light emitting unit 10 does not irradiate to the surface of the infrared light sensing unit 30, the angle range of the lateral visible light received by the adjacent infrared light sensing units 30 is smaller, and the noise interference generated by the visible light on the infrared light sensing unit 30 can be reduced; the display light emitting unit 10 and the infrared light sensing unit 30 are arranged so as not to overlap in the light emitting direction Z, and shielding of the infrared detection signal by the display light emitting unit 10 can be avoided. In addition, by disposing the visible light shielding structure 40 between the display light emitting unit 10 and the infrared light sensing unit 30, the visible light emitted by the display light emitting unit 10 can be further blocked from being sensed by the infrared light sensing unit 30, so that the signal interference caused by the visible light to the infrared light sensing unit 30 is further blocked, and the accuracy of infrared light gesture recognition and sensing is improved. Of course, the gesture recognition subject is not limited to the finger, but may be other biological parts such as a palm, a finger joint, a sole, and the like.
It should be noted that, the display light emitting unit 10 of the present application may be a blue light emitting chip, or may be a red, green, blue color light emitting chip, which is not limited in particular, and a person skilled in the art may select the type of the display light emitting unit 10 according to the application scenario and the process selection requirement. The number of the infrared light emitting units 20 and the number of the infrared light sensing units 30 can be 1 or more, and the specific number is not limited in the embodiment of the present application; however, when the infrared light emitting units 20 are disposed in the display area AA, the excessive number of the infrared light emitting units 20 and the infrared light sensing units 30 occupy a larger area of the display area AA, which may result in a decrease in resolution or brightness of the display screen 100, and affect the display effect. Therefore, a person skilled in the art can adjust the specific number, area and position of the corresponding infrared light emitting units 20 and infrared light sensing units 30 according to actual needs, and reduce the influence on the normal display effect of the display screen 100 on the basis of being able to realize the infrared sensing gesture detection function.
Optionally, the display light emitting unit 10 provided in the embodiment of the present application may be a Micro LED, and the infrared light emitting unit 20 may be an infrared/ultraviolet Micro LED; or the display lighting unit 10 may be a Mini LED, and the infrared lighting unit 20 may be an infrared/ultraviolet Mini LED; the display light-emitting unit 10 and the infrared light-emitting unit 20 can share a huge transfer process in the manufacturing process, so that the manufacturing process can be simplified, the production cost can be saved, and the product yield and the reliability can be guaranteed. It should be noted that, the Micro LED according to the present application is an inorganic light emitting diode with a chip size smaller than 100 microns, and the Mini LED is an inorganic light emitting diode with a chip size between 100 and 500 microns.
It should be noted that, the display screen 100 in the present application may be of an active light emitting type or a passive light emitting type; when it is an active light emitting type panel, for example: the Micro LED display screen, the display lighting unit 10 at this time is a direct display unit for displaying the picture image of the display screen 100; when the display light emitting unit 10 is a passive light emitting panel, such as a Mini LED lcd, the display light emitting unit 10 mainly functions to provide a backlight source, which is a direct-dot matrix light source, may be monochromatic or color, and is matched with a liquid crystal box to realize color picture display of the display 100.
Optionally, FIG. 3 is a cross-sectional view of still another AA' of the display screen provided by the embodiment of FIG. 1; the display screen 100 provided in the embodiment of the present application further includes: a driving circuit substrate 50, the display light emitting unit 10 and the infrared light sensing unit 30 being electrically connected to the driving circuit substrate 50; the display light emitting unit 10 is located at one side of the driving circuit substrate 50 facing the light emitting surface of the display screen 100, and the infrared light sensing unit 30 is located in the driving circuit substrate 50.
In particular, please refer to fig. 1 and 3; the display panel 100 includes a driving circuit substrate 50, the driving circuit substrate 50 including a substrate 501 and a driving circuit layer 502; it should be noted that the relative positional relationship between the driving circuit layer 502 and the substrate 501 may be changed, and when the driving circuit layer 502 is located on the side of the substrate 501 away from the light emitting surface, the substrate 501 is made of a transparent material. The driving circuit layer is internally provided with control circuits (not shown in fig. 3) of the display light emitting unit 10, the infrared light emitting unit 10 and the infrared light sensing unit 30, the display light emitting unit 10 and the infrared light sensing unit 30 are electrically connected with the driving circuit substrate 50, and selective opening or closing of the display light emitting unit 10 and the corresponding infrared light sensing unit 30 at corresponding positions can be realized through control point circuits in the driving circuit substrate 50. The display light emitting unit 10 is located at a side of the driving circuit substrate 50 facing the light emitting direction Z of the display screen 100, and when the control circuit inside the driving circuit substrate 50 is turned on, the visible light emitted by the display light emitting unit 10 can be perceived by the human eye at the light emitting side, so as to avoid shielding the visible light by the driving circuit substrate 50. The infrared light sensing unit 30 is located in the driving circuit substrate 50, so that on one hand, the integration level of a film layer, a process procedure and the like of the display screen 100 can be improved, and the cost is reduced; on the other hand, the driving circuit substrate 50 further includes an insulating protection layer 503 disposed on the surface of the driving circuit layer 502, where the insulating protection layer 503 has a certain light refractive index, and when the infrared light sensing unit 30 is integrated in the driving circuit substrate 50, the insulating protection layer 503 can further block the visible light interference light emitted by the display light emitting unit 10 and reflected to the upper side of the infrared light sensing unit 30; although the insulation protection layer 503 may also affect the detection light emitted by the infrared light emitting unit 20 to a certain extent, the energy reduction degree after passing through the insulation protection layer 503 is far smaller than the visible light emitted by the display light emitting unit 10 due to the wider spectrum of the infrared detection light; therefore, the infrared light sensing unit 30 is integrated inside the driving circuit substrate 50, so that the problem of noise caused by the display light emitting unit 10 can be reduced, and the accuracy of infrared light sensing gesture sensing is improved. It should be noted that, the infrared light emitting unit 20 may be electrically connected to the driving circuit substrate 50, and the driving circuit substrate 50 provides the switch control signal for the infrared light emitting unit 20, so that the high integration of various driving circuits in the display 100 can be improved.
Optionally, fig. 4 is a schematic partial structure of a display screen according to an embodiment of the present application; as shown in fig. 4, the display light emitting unit 10 and the infrared light emitting unit 20 are arranged in the same layer; the photosensitive detection area SA includes at least one unit sensing area USA including a plurality of display light emitting units 10 and infrared light emitting units 20 arranged in an array, and a plurality of infrared light sensing units 30 disposed around the outer circumference of the unit sensing area USA. Specifically, referring to fig. 4, a plurality of unit sensing areas USA are distributed in an array in the photosensitive detection area SA, the unit sensing areas USA include a plurality of display light emitting units 10 and infrared light emitting units 20 arranged in an array, and a plurality of infrared light sensing units 30 are disposed around the periphery of the unit sensing areas USA. By such design, when the sizes of the infrared light emitting unit 20 and the display light emitting unit 10 are equal, the infrared light emitting unit 20 can be arranged at the original position for arranging the display light emitting unit 10 on the premise of not influencing the display function of the display screen 100, so that the display light emitting unit 10 and the infrared light emitting unit 20 can be controlled to emit light at the same time. Therefore, the structure of the display screen can be simplified without additionally arranging the structure for fixing the infrared light-emitting unit 20, the cost of the display screen is reduced, and the display screen has higher screen occupation ratio; furthermore, the design can avoid generating visual effect dark spots, and has smaller influence on display brightness. It should be noted that, the number of the infrared light sensing units 30 surrounding the outer circumference of the unit sensing area USA may not be limited; when the infrared light sensing units 30 can be uniformly distributed at equal intervals on the periphery of the unit sensing area USA, the accuracy and sensitivity of infrared detection can be improved more advantageously.
Still alternatively, referring to fig. 4, in the unit sensing area USA, the display light emitting units 10 are disposed around the infrared light emitting units 20, and the number ratio of the display light emitting units 10 to the infrared light emitting units 20 is M, where M is greater than or equal to 4:1. When at least 4 display light emitting units 10 are uniformly disposed at the outer circumference of one infrared light emitting unit 20, the infrared light emitting unit 20 is disposed substantially at the center of the unit sensing area USA; the intensity at which the infrared light can be received by the infrared light sensing unit 30 at each position on the periphery of the unit sensing area USA remains substantially uniform; in addition, the infrared light emitting unit 20 and the infrared light sensing unit 30 are isolated by the display light emitting unit 10, so that the infrared light sensing unit 30 can be prevented from directly receiving the influence of the refracted infrared contrast light emitted by the infrared light emitting unit 20, and the accuracy and the sensitivity of infrared detection are improved. It should be noted that, in other embodiments, M may also be selectively set to 14:2, 8:1, etc. in the unit detection area USA; however, in order to enable the infrared light received by the infrared light sensing unit 30 to have a sufficiently large light intensity, it is necessary that the front projection of the infrared light emitting unit 20 on the display screen 100 cannot be far away from the infrared light sensing unit 30, for example, the front projection of the infrared light emitting unit 20 on the display screen 100 may be spaced 2 to 3 display light emitting units 10 from the infrared light sensing unit 30; on the premise of realizing the infrared detection function, the number of the display light emitting units 10 between the front projection of the infrared light emitting unit 20 on the display screen 100 and the infrared light sensing unit 30 is not particularly limited in the embodiment of the present invention.
Optionally, fig. 5 is a schematic structural diagram of a display screen provided by an embodiment of the present application, and fig. 6 is a BB' cross-sectional view of the display screen provided by the embodiment of fig. 5; referring to fig. 5 and 6, the display 100 further includes a flexible circuit board 70, where the flexible circuit board 70 is located on one side of the backlight surface of the driving circuit substrate 50; in the light emitting direction Z of the display 100, the infrared light emitting unit 20 is located between the flexible circuit board 70 and the driving circuit substrate 50 and is bound to the flexible circuit board 70, and the infrared light emitting unit 20 and the infrared light sensing unit 30 do not overlap at least partially.
Specifically, referring to fig. 5 and 6, the display 100 includes a driving circuit substrate 50 and a flexible circuit board 70, and the driving circuit substrate 50 and the flexible circuit board 70 are stacked in the light emitting direction Z of the display 100. The display light emitting unit 10 is electrically bound with the driving circuit substrate 50, and the infrared light emitting unit 10 is electrically bound with the flexible circuit board 70; the infrared light emitting unit 10 is located between the driving circuit substrate 50 and the flexible circuit board 70; in this way, different layer setting of the display light emitting unit 10 and the infrared light emitting unit 20 can be realized, and the infrared light emitting unit 20 is prevented from occupying the setting space of the display light emitting unit 10 on the basis of ensuring the infrared detection function of the display screen 100, so that the display screen 100 maintains higher resolution and display brightness. The infrared light emitting unit 10 and the infrared light sensing unit 30 are at least partially not overlapped, so that the infrared light sensing unit 30 can be prevented from shielding the infrared detection light emitted by the infrared light emitting unit 10, the infrared detection light emitted by the infrared light emitting unit 20 can be emitted through the display screen 100, and the infrared detection light can be received by the infrared light sensing unit 30 after being reflected by a touch object when the touch object exists, and accordingly, a corresponding infrared detection function is realized.
It should be noted that, since the driving circuit substrate 50 and the display light emitting unit 10 are disposed on the light emitting path of the infrared light emitting unit 20, in order to avoid shielding the infrared detection light emitted by the infrared light emitting unit 20 by the driving circuit substrate 50 and the display light emitting unit 10, the driving circuit substrate 50 and the display light emitting unit 10 are made of transparent materials. In addition, when the infrared light emitting units 10 are individually arranged on the flexible circuit board 7, the infrared light emitting units 10 can be larger in size than normal LEDs, the number of the infrared light emitting units can be more than that of the infrared light emitting units which are integrated in the display screen, the area of the flexible circuit board 70 can be equal to that of the display screen 100, and the infrared light emitting units 10 can be uniformly distributed on the surface of the whole flexible circuit board 70; therefore, the present application does not impose absolute restrictions on the number and size of the infrared light emitting units 10 in the case of this embodiment.
Still alternatively, referring to fig. 6, the driving circuit substrate 50 further includes a light shielding portion 90, where the light shielding portion 90 is located on a side of the infrared light sensing unit 30 facing the infrared light emitting unit 20. Because the infrared light sensing unit 30 is disposed on the light emitting direction path of the infrared light emitting unit 20, and the light shielding cloth 90 is disposed on the light transmitting path, it is able to avoid that the infrared detection light emitted by the infrared light emitting unit 20 directly irradiates onto the infrared light sensing unit 30, thereby interfering with the determination of the normal detection signal and affecting the accuracy and precision of the infrared detection function. Note that, the light shielding portion 90 may be disposed by the same process as the original light shielding film layer inside the driving circuit substrate 50; for example, the LSM layer is formed under a Thin Film Transistor (TFT) active layer that is located inside the driving circuit substrate 50 and bears a switching circuit. In other embodiments, the light shielding portion may be a black light shielding film layer or black light shielding glue attached to the back surface of the driving circuit substrate 50.
Optionally, referring to fig. 3, in a direction parallel to the light emitting surface of the display screen 100, the display light emitting unit 10 includes a sidewall 101 facing the infrared light sensing unit 30 disposed adjacently, and the visible light shielding structure 40 at least partially covers the sidewall 101 of the display light emitting unit 10.
Specifically, referring to fig. 3, the visible light shielding structure 40 covers the side wall 101 of the display light emitting unit 10, and in a typical case, the light emitting angle of the display light emitting unit 10 is about 120 degrees, so that not only the emergent light directly facing the light emitting direction Z of the display screen 100 exists, but also the oblique emergent light forming a certain angle with the light emitting direction Z is included; according to the reflection distance of the light, the visible light emergent ray with the ray emergent angle close to the infrared light sensing unit 30 side is easily reflected by the finger and then irradiates to the upper part of the infrared light sensing unit 30; the visible emergent ray on the side of the infrared light sensing unit 30 with the ray emergent angle being directly upward or far away from the infrared light sensing unit 30 is not reflected to the upper part of the infrared light sensing unit 30; therefore, when the visible light shielding structure 40 is covered on the side wall 101 of the display light emitting unit 10 near the infrared light sensing unit 30, the visible light outgoing light whose light outgoing angle is near the infrared light sensing unit 30 side can be blocked; noise light is prevented from adversely affecting the light sensation accuracy of the display screen 100. It should be appreciated that other light rays are noise light except for the infrared reflected light formed by the reflection of the sensing body. Note that, the visible light shielding structure 40 shown in fig. 3 completely covers the side wall 101 of the display light emitting unit 10, and in other cases, may be provided as a partial cover.
Optionally, fig. 7 is a schematic structural diagram of a display screen according to an embodiment of the present application; FIG. 8 is a cross-sectional view of a display screen according to the embodiment of FIG. 7; referring to fig. 7 and 8, the light emitting unit 10 is shown to include at least two color sub-light emitting units 101/102/103; the visible light shielding structure 40 may be located between any adjacently arranged color sub-light emitting units 101/102/103 and/or between the color sub-light emitting units 101/102/103 and the infrared light emitting unit 20 and/or between the color sub-light emitting units 101/102/103 and the infrared light sensing unit 30 and/or between the infrared light emitting unit 20 and the infrared light sensing unit 30 in a direction parallel to the light emitting surface of the display screen 100.
Specifically, referring to fig. 7 and 8, the display light emitting unit 10 includes color sub-light emitting units 101/102/103 arranged in an array, where the color sub-light emitting units 101/102/103 may include a green light emitting chip 101, a red light emitting chip 102 and a blue light emitting chip 103, and the green light emitting chip 101, the red light emitting chip 102 and the blue light emitting chip 103 are used to provide basic three primary colors for displaying pixels of an image on the display screen 100; in order to avoid light crosstalk between adjacently arranged display light emitting units 10, a visible light shielding structure 40 is arranged between any adjacently arranged color sub-light emitting units 101/102/103; in addition, the visible light shielding structure 40 is arranged between the color sub-light emitting units 101/102/103 and the infrared light emitting unit 20, so that refraction interference among different light emitting units can be avoided, the purity of infrared detection light is ensured, and the infrared gesture sensing precision is improved; and/or between the color sub-lighting units 101/102/103 and the infrared light sensing unit 30. When the visible light shielding structure 40 is disposed between the color sub-light emitting units 101/102/103 and the infrared light sensing unit 30, the light of the color sub-light emitting units 101/102/103 can be blocked from being perceived by the infrared light sensing unit 30; noise light is prevented from adversely affecting the light sensation accuracy of the display screen 100. Note that, the visible light shielding structure 40 shown in fig. 7 is disposed between any adjacent color sub-light emitting units 101/102/103, color sub-infrared light emitting units 20, and infrared light sensing units 30; in other non-illustrated embodiments, optional portions may also be provided between the color sub-lighting units 101/102/103, the infrared lighting unit 20, and the infrared light sensing unit 30.
Since the wavelength of red light is longest, the wavelength of green light is inferior, and the wavelength of blue light is shortest, that is, blue light is most easily excited to generate infrared light/ultraviolet light, among the three colors of visible light of red, green and blue, the blue light emitting chip 103 emitting blue light can be disposed at the position farthest from the infrared light emitting unit 20, the green light emitting chip 103 emitting green light can be disposed at the position closest to the infrared light emitting unit 20, and the red light emitting chip 102 emitting red light can be disposed at the position closest to the infrared light emitting unit 20.
Further alternatively, refer to fig. 1, 7; the visible light shielding structure 40 may be a light absorbing material; for example, the light absorbing material is a black organic film or an ink material, and the black organic film or the ink material is used for manufacturing the retaining wall, so that the interference of noise light to the infrared light sensing unit 30 can be weakened and even eliminated, the sensing precision and accuracy of the display screen are ensured, and meanwhile, the production cost can be saved.
Optionally, fig. 9 is a schematic structural diagram of a display screen according to an embodiment of the present application; FIG. 10 is a DD' section view of the display screen provided by the embodiment of FIG. 9; please refer to fig. 9 and 10; in the light-emitting direction Z toward the display screen 100, the visible light shielding structure 40/401 is located above the infrared light sensing unit 30 and covers the photosensitive surface 301 of the infrared light sensing unit 30.
Specifically, referring to fig. 9 and 10, the infrared light sensing unit 30 includes an upper surface 301 facing the light emitting surface of the display screen 100, and the upper surface 301 is a photosensitive surface of the infrared light sensing unit 30 for detecting light; if the noise light cannot reach the photosensitive surface 301 to be sensed, the interference of the noise light to the infrared light sensing unit 30 can be eliminated; by directly disposing the visible light shielding structure 40/401 above the photosensitive surface 301 and covering the photosensitive surface 301 of the infrared light sensing unit 30, the visible light shielding structure 401 has the material properties of transmitting infrared light and intercepting visible light, so that interception of visible light can be realized, but infrared detection light is not blocked from being received by the photosensitive surface, and sensing accuracy and precision of infrared light sensing gesture recognition of the display screen 100 can be ensured.
It should be noted that, since the wavelength of the infrared light is generally not less than 900nm, the transmittance of the visible light shielding structure 401 for the light with the wavelength not less than 900nm is not less than 90%, and the transmittance for the light with the wavelength less than 900nm is not more than 5%, so as to reduce the signal amount of other optical signals except the infrared light signal in the optical signals received by the infrared light sensing unit 30, improve the light sensation recognition precision of the display screen 100, and improve the user experience. The application is not limited thereto and is specifically applicable.
With continued reference to fig. 9 and 10, it can be seen that the material of the light shielding structure 401 may be plastic (such as Polycarbonate, PC for short), a light shielding layer made of a material such as polymethyl methacrylate, poly METHYL METHACRYLATE, PMMA for short, silicon, germanium, or an infrared light transmitting film, which is not limited in this application.
Further alternatively, fig. 11 is a schematic structural diagram of a display screen according to an embodiment of the present application; as shown in fig. 8, in addition to the arrangement of the visible light shielding structure 401 above the infrared light sensing unit 30, the visible light shielding structure 402 may be arranged between the adjacent color sub-light emitting units 101/102/103, the color sub-infrared light emitting unit 20 and the infrared light sensing unit 30, so as to effectively avoid more noise light and be beneficial to ensuring the accuracy of infrared detection.
Optionally, fig. 12 is a schematic structural diagram of a display screen according to an embodiment of the present application; FIG. 13 is a cross-sectional view of a QQ' of the display screen provided by the embodiment of FIG. 12; referring to fig. 12 and 13, in a light emitting direction Z toward the display screen 100, the visible light shielding structure 40 includes at least two color resists 403/404 disposed on each other, the color resists 403/404 include a blue color resist 404 and a red color resist 403, and the color resists 403/404 are located above the infrared light sensing unit 30 and cover the photosensitive surface of the infrared light sensing unit 30.
Specifically, two layers of color resistors 403/404, namely a blue resistor 404 and a red resistor 403, are stacked above the infrared light sensing unit 30, and according to the optical test data, referring to fig. 14, fig. 14 shows the test data of the transmittance of light by the stacked blue resistor 404 and red resistor 403; the blue color resistor 404 and the red color resistor 403 which are overlapped can isolate most of visible light at 800nm, but can transmit infrared light; therefore, when the stacked blue color resistor 404 and red color resistor 403 are disposed above the infrared light sensing unit 30 and cover the photosensitive surface of the infrared light sensing unit 30, the infrared light gesture function can be realized by matching with the Mini LED display screen, and the visible scattered light of surrounding Mini LEDs can be isolated to reduce noise. It should be noted that, the display light emitting unit 10 in this embodiment may be a blue light emitting chip that emits blue light, and the blue color set 404 is disposed above the red color set 403, so that the purity of the image display light can be ensured, and the image display effect of the display screen 100 can be improved.
Still alternatively, as shown in fig. 13, the surface of the driving circuit substrate 50 facing the light emitting surface of the display screen 100 includes at least one opening 504, and the color resistors 403/404 are at least partially located in the opening 504 along the light emitting direction Z of the display screen 100; the color resistors 403/404 are arranged in the openings 504 above the infrared light sensing unit 30, so that on one hand, the flat upper surface of the driving circuit substrate 50 can be ensured, and the yield of the display light emitting unit 10 and the infrared light emitting unit 20 which are transferred to the driving circuit substrate 50 in a large amount can be improved; on the other hand, the display screen 100 is prevented from suffering from color cast; since the stacked double-layer color resistors 403/404 only filter part of the visible light of the wavelength band after the lateral light of the display light-emitting unit 10 irradiates the color resistors 403/404 and is filtered, the color shift phenomenon can be observed by human eyes.
Optionally, fig. 15 is a schematic structural diagram of a display screen according to an embodiment of the present application; referring to fig. 15, the display 100 further includes a display panel 11 and at least one diffusion film 60; in the light emitting direction Z of the display 100, the driving circuit substrate 50, the diffusion film 60, and the display panel 11 are stacked; the diffusion film is made of infrared light-transmitting materials.
Specifically, please continue to refer to fig. 15; when the display panel 11 of the display 100 is a passive light-emitting type liquid crystal display panel, the display 100 should be further provided with a backlight module 12; the display light emitting unit 10 provided in the backlight module 12 can provide a backlight source for the display panel 11 under the control of the electric signal of the driving circuit substrate 50. Note that, the display light emitting unit 10 may be Mini LEDs arranged in a direct type array. At the side of the driving circuit substrate 50 near the display panel 11, the display screen 100 further includes a diffusion film 60, that is, the diffusion film 60 is located at the light-emitting surface side of the display light-emitting unit 10, and the diffusion film can make the light emitted by the Mini-LED light-emitting unit pass through the diffusion film, so that the brightness of the light output on the display panel 11 is more uniform, and the firefly phenomenon is avoided. In addition, when the infrared light emitting unit 20 is also integrated in the backlight module 12, the diffusion film 60 is made of an infrared transmitting material, so that shielding of infrared detection light can be avoided, which is beneficial to ensuring accuracy of infrared detection.
Fig. 16 is a schematic structural diagram of a display device according to an embodiment of the application. As shown in fig. 16, the display device 200 provided in this embodiment includes the display screen 100 provided in the above embodiment. The embodiment of fig. 16 is only an example of a mobile phone, and the display device 200 is described, but it is understood that the display device 200 provided in the embodiment of the present application may be other display devices 200 having a display function, such as a computer, a television, and a vehicle-mounted display device, which is not particularly limited in the present application. The display device 200 provided in the embodiment of the present application has the beneficial effects of the display screen provided in the embodiment of the present application, and the specific description of the display screen 100 in the above embodiments may be referred to specifically, and this embodiment is not repeated here.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (15)
1. A display screen, comprising: the display area and a non-display area at least partially surrounding the display area, and at least part of the display area is a photosensitive detection area;
the display area comprises a plurality of display light-emitting units, at least one infrared light-emitting unit and at least one infrared light sensing unit which are arranged in an array manner;
In the light emitting direction of the display screen, the display light emitting unit and the infrared light sensing unit are positioned at different film heights and are not overlapped;
A visible light shielding structure between the display light emitting unit and the infrared light sensing unit;
The display lighting unit comprises at least two color sub lighting units; the visible light shielding structure may be located between any adjacently arranged color sub-light emitting units, and/or between the color sub-light emitting units and the infrared light emitting unit, and/or between the color sub-light emitting units and the infrared light sensing unit, and/or between the infrared light emitting units and the infrared light sensing unit, in a direction parallel to the light emitting surface of the display screen.
2. A display screen as recited in claim 1, wherein: also included is a method of manufacturing a semiconductor device,
The display light-emitting unit is electrically connected with the driving circuit substrate;
The display light-emitting unit is positioned on one side of the driving circuit substrate facing the light-emitting surface of the display screen, and the infrared light sensing unit is positioned in the driving circuit substrate.
3. A display screen as claimed in claim 2, wherein: the display light-emitting unit and the infrared light-emitting unit are arranged on the same layer; the photosensitive detection area comprises at least one unit sensing area, and the unit sensing area comprises a plurality of display light-emitting units and infrared light-emitting units which are arranged in an array mode, and a plurality of infrared light sensing units which are arranged around the periphery of the unit sensing area.
4. A display screen as claimed in claim 3, wherein:
In the unit sensing area, the display light-emitting unit is arranged around the infrared light-emitting unit, and the quantity ratio of the display light-emitting unit to the infrared light-emitting unit is M, wherein M is greater than or equal to 4:1.
5. A display screen as claimed in claim 2, wherein: the display screen also comprises a flexible circuit soft board, wherein the flexible circuit soft board is positioned at one side of the backlight surface of the driving circuit substrate;
In the light emitting direction of the display screen, the infrared light emitting unit is located between the flexible circuit board and the driving circuit substrate and is bound with the flexible circuit board, and the infrared light emitting unit and the infrared light sensing unit are at least partially not overlapped.
6. A display screen as recited in claim 5, wherein: the driving circuit substrate further comprises a shading part, and the shading part is positioned on one side of the infrared light sensing unit, which faces the infrared light emitting unit.
7. A display screen as claimed in claim 2, wherein: in the direction parallel to the light emitting surface of the display screen, the display light emitting unit comprises a side wall facing the infrared light sensing unit adjacently arranged, and the visible light shielding structure at least partially covers the side wall of the infrared light sensing unit.
8. A display screen as recited in claim 1, wherein: the visible light shielding structure is a light absorbing material.
9. A display screen as claimed in claim 2, wherein: the visible light shielding structure is positioned above the infrared light sensing unit and covers the photosensitive surface of the infrared light sensing unit in a light emitting direction towards the display screen.
10. A display screen as recited in claim 9, wherein: the material of the visible light shielding structure comprises at least one of plastic, alexander, silicon, germanium or infrared transmitting film.
11. A display screen as claimed in claim 2, wherein: in the light-emitting direction towards the display screen, the visible light shielding structure comprises at least two layers of color resistances which are arranged in a laminated mode, the color resistances comprise blue color resistances and red color resistances, and the color resistances are positioned above the infrared light sensing unit and cover the photosensitive surface of the infrared light sensing unit.
12. A display screen as recited in claim 11, wherein: the surface of the driving circuit substrate facing the light emitting surface side of the display screen comprises at least one opening, and the color resistor is at least partially positioned in the opening.
13. A display screen as claimed in claim 2, wherein: the display screen also comprises a display panel and at least one layer of diffusion film; the driving circuit substrate, the diffusion film and the display panel are stacked in the light emitting direction of the display screen; the diffusion film is made of infrared light-transmitting materials.
14. The display screen of claim 1, wherein the display light emitting unit is a Micro LED or a Mini LED, and the infrared light emitting unit is an infrared Micro LED or an infrared Mini LED.
15. A display device comprising a display screen as claimed in any one of claims 1 to 14.
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| CN115685616A (en) * | 2022-10-27 | 2023-02-03 | 深圳市华弘智谷科技有限公司 | Display device and eye movement tracking system |
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| CN107392081B (en) * | 2017-03-23 | 2021-06-29 | 奇鋐科技股份有限公司 | Image recognition and photography module |
| KR102636405B1 (en) * | 2018-09-28 | 2024-02-14 | 엘지디스플레이 주식회사 | Display apparatus including light rpceving pixel area |
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