CN114740994A - Display screen and display device - Google Patents
Display screen and display device Download PDFInfo
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- CN114740994A CN114740994A CN202210307367.2A CN202210307367A CN114740994A CN 114740994 A CN114740994 A CN 114740994A CN 202210307367 A CN202210307367 A CN 202210307367A CN 114740994 A CN114740994 A CN 114740994A
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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
Abstract
The embodiment of the invention provides a display screen and a display device, comprising: the display device comprises a display area and a non-display area at least partially surrounding the display area, wherein at least part of the display area is a photosensitive detection area; the display area comprises a plurality of display light-emitting units arranged in an array, at least one infrared light-emitting unit and at least one infrared light sensing unit; 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 layer heights and are not overlapped; a visible light shielding structure between the display light emitting unit and the infrared light sensing unit. According to the embodiment of the invention, the adverse effect of the light rays emitted by the display light-emitting unit on the infrared light sensing unit can be reduced, and the accuracy of infrared light sensing gesture recognition sensing is improved.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display screen and a display device.
Background
Along with the development of display technology, more and more display screens integrate the light sensation identification function to improve the display screen integration level, thereby improve user experience. The infrared light sensing gesture recognition is to integrate a photosensitive element on a panel to realize gesture recognition and touch control functions within a certain distance, and can be used in severe environments because the infrared light sensing gesture recognition is not interfered by current, voltage and static electricity, so that the infrared light sensing gesture recognition is widely applied to electronic equipment such as mobile phones and tablet computers.
Specifically, when the sensing body such as a finger performs a sensing action, infrared light emitted by the infrared light source is reflected by the finger and then received by the photosensitive element, and the received reflected light is subjected to photoelectric conversion by the photosensitive element to form a current/voltage signal, so that the detection and the positioning of the touch action of the user are realized according to the current signal or the voltage signal.
However, in the existing design, the infrared light source, the display pixel unit and the photosensitive element in the display screen panel are disposed on the same layer, and there is light refraction interference between various light-emitting units, for example, visible light emitted by the display pixel unit in the display screen can cause noise interference to the photosensitive element, thereby reducing the accuracy of infrared light sensing gesture recognition.
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 sensing gesture recognition sensing.
In a first aspect, a display screen includes:
a display area and a non-display area at least partially surrounding the display area; at least part of the display area is a photosensitive detection area;
the display area comprises a plurality of display light-emitting units arranged in an array, at least one infrared light-emitting unit and at least one infrared light sensing unit;
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 layer heights and are not overlapped;
a visible light shielding structure between the display light emitting unit and the infrared light sensing unit. In a second aspect, the present application further provides a display device comprising the above display screen.
Compared with the prior art, the display screen and the display device provided by the invention at least realize the following beneficial effects:
the display screen and the display device provided by the invention comprise a plurality of display light-emitting units arranged in an array, at least one infrared light-emitting unit and at least one infrared light sensing unit; the display light-emitting unit is used for providing visible light required by picture display, the infrared light-emitting 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 current/voltage signals and transmitting the sensed signals to the chip processing system, and the IC is used for detecting and positioning actions according to the current signals or the voltage signals so as to realize the infrared light sensing gesture recognition function of the display screen. In the light-emitting direction of the display screen, the display light-emitting units and the infrared light sensing units are located at different film layer heights, because under normal conditions, the light-emitting angle of the display light-emitting units is about 120 degrees generally on the light-emitting surface of the display screen, the display light-emitting units and the infrared light sensing units are arranged in different layers, the angle range of lateral visible light rays received by the adjacent infrared light sensing units is small, 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 rays emitted by the display light-emitting unit can be further prevented from being sensed by the infrared light sensing unit after being reflected by fingers, and the accuracy of infrared light sensing gesture recognition sensing is improved.
Of course, it is not necessary for any product in which the present invention is practiced to achieve all of the above-described technical effects simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, 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 provided in an embodiment of the present application;
FIG. 2 is an AA' cross-sectional view of the display provided in the embodiment of FIG. 1;
FIG. 3 is a cross-sectional view of yet another AA' of the display provided in the embodiment of FIG. 1;
fig. 4 is a schematic partial structure diagram of a display screen provided in an embodiment of the present application;
fig. 5 is a schematic structural diagram of a display screen provided in an embodiment of the present application;
FIG. 6 shows a cross-sectional view of a BB' of the display provided in the embodiment of FIG. 5;
fig. 7 is a schematic structural diagram of a display screen provided in an embodiment of the present application;
FIG. 8 is a cross-sectional view of a CC' of the display provided in the embodiment of FIG. 7;
fig. 9 is a schematic structural diagram of a display screen provided in an embodiment of the present application;
FIG. 10 is a DD' cross-sectional view of the display screen provided in the embodiment of FIG. 9;
fig. 11 is a schematic structural diagram of a display screen provided in the embodiment of the present application;
fig. 12 is a schematic structural diagram of a display screen provided in the embodiment of the present application;
FIG. 13 is a cross-sectional view of a QQ' of the display screen provided in the embodiment of FIG. 12;
FIG. 14 shows the data of the transmittance of light rays for the stacked blue color resist 404 and red color resist 403;
fig. 15 is a schematic view illustrating a structure of another film layer of a display screen according to an embodiment of the present disclosure;
fig. 16 is a schematic structural diagram of a display device according to an embodiment of the present disclosure.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Techniques, methods, and apparatus known to those 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 numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Fig. 1 is a schematic structural diagram of a display screen provided in an embodiment of the present application, and fig. 2 is an AA' cross-sectional view of the display screen provided in 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 arranged in an array, at least one infrared light emitting unit 20, and at least one infrared light sensing unit 30;
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 located at different film layer heights and do not overlap; the display screen 100 further includes a visible light shielding structure 40 located between the display light emitting unit 10 and the infrared light sensing unit 30.
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, where 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, a plurality of infrared light-emitting units 20 and a plurality of external light-sensing units 30, and the X direction and the Y direction are perpendicular to a light-emitting direction Z of the display screen 100. It should be noted that, in the display screen 100 provided in the embodiment of the present invention, at least part of the display areas AA are photosensitive detection areas SA, that is, when all the display areas AA of the display screen 100 are photosensitive detection areas SA, a full-screen fingerprint identification function 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 implement a function of fingerprint recognition or gesture operation in a specific area. Furthermore, the orthographic projections of the plurality of infrared light-emitting units 20 in the display screen 100 on the plane of the photosensitive detection area SA can 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 arranged oppositely; alternatively, the orthographic projection of the plurality of infrared light-emitting units 20 in the display screen 100 on the plane of the photosensitive detection area SA is located in the photosensitive detection area SA, as shown in fig. 1; the embodiment of the present invention does not specifically limit the above situations. The display light-emitting 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; then, the IC detects and positions the motion according to the current signal or the voltage signal, and further realizes the infrared light sensing gesture recognition function of the display screen 100. Specifically, the infrared light sensing unit 30 may be a photodiode (e.g., an avalanche photodiode, a PIN photodiode, etc.) or other photosensitive sensor that can implement an infrared receiving function. In the light emitting direction Z of the display screen 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; under normal conditions, 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 display light emitting unit 10 and the infrared sensing unit 30 in different layers, at least part of the visible light rays emitted laterally by the display light emitting unit 10 cannot irradiate the surface of the infrared light sensing unit 30, the angle range of the lateral visible light rays received by the adjacent infrared light sensing unit 30 is smaller, and the bottom noise interference generated by the visible light rays on the infrared light sensing unit 30 can be reduced; the display light-emitting unit 10 and the infrared light sensing unit 30 are not overlapped in the light-emitting direction Z, so that the display light-emitting unit 10 can avoid shielding the infrared detection signal. In addition, the visible light shielding structure 40 is arranged between the display light emitting unit 10 and the infrared light sensing unit 30, so that the visible light emitted by the display light emitting unit 10 can be further prevented from being sensed by the infrared light sensing unit 30, the visible light is further prevented from causing signal interference to the infrared light sensing unit 30, and the accuracy of infrared light sensing gesture recognition sensing is improved. Of course, the gesture recognition subject is not limited to a finger, and may be other biological parts such as a palm, a finger joint, and a sole.
It should be noted that the display light-emitting unit 10 of the present application may be a blue light-emitting chip, and may also be a color light-emitting chip such as red, green, blue, etc., and the present application is not limited thereto specifically, and a person skilled in the art may specifically 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 may be greater than or equal to 1, and the specific number is not limited in the embodiment of the present invention; however, when the infrared light emitting units 20 are disposed in the display area AA, the infrared light emitting units 20 and the infrared light sensing units 30 disposed in too many numbers occupy a larger area of the display area AA, which may cause a reduction in resolution or brightness of the display screen 100, and affect the display effect. Therefore, those 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 realizing the infrared light 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; alternatively, the display light emitting unit 10 may be a Mini LED, and the infrared light emitting 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 reliability can be guaranteed. It should be noted that the Micro LED in the present application is an inorganic light emitting diode with a chip size of less than 100 microns, and the Mini LED is an inorganic light emitting diode with a chip size of between 100 and 500 microns.
It should be noted that the display screen 100 in the present application may be an active light emitting type or a passive light emitting type; when it is an active light emitting type panel, for example: a Micro LED display screen, wherein the display light-emitting unit 10 is a direct display unit for displaying the picture image on the display screen 100; when the display panel 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-down dot-matrix light source, and may be a monochromatic light source or a color light source, and is matched with a liquid crystal cell to realize color image display of the display panel 100.
Optionally, fig. 3 is a cross-sectional view of still another AA' of the display screen provided in the embodiment of fig. 1; in the display screen 100 provided in the embodiment of the present application, further include: the driving circuit substrate 50, the display light-emitting unit 10 and the infrared light sensing unit 30 are electrically connected with the driving circuit substrate 50; the display light emitting unit 10 is located on 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.
Specifically, please refer to fig. 1 and 3; the display screen 100 comprises a driving circuit substrate 50, wherein the driving circuit substrate 50 comprises a substrate 501 and a driving circuit layer 502; it should be noted that the relative position relationship between the driving circuit layer 502 and the substrate 501 can 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 display light-emitting unit 10, the infrared light-emitting unit 10 and the infrared light sensing unit 30 are electrically connected to the driving circuit substrate 50, and the display light-emitting unit 10 and the infrared light sensing unit 30 at corresponding positions can be selectively turned on or off by control points in the driving circuit substrate 50. The display light-emitting unit 10 is located on one 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 human eyes on the light-emitting side, so that the driving circuit substrate 50 is prevented from shielding the visible light. The infrared light sensing unit 30 is located in the driving circuit substrate 50, so that on one hand, the integration level of the film layer, the process 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 on the surface of the driving circuit layer 502, the insulating protection layer 503 has a certain light refractive index, and when the infrared light sensing unit 30 is integrated inside 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 insulating protective layer 503 may also affect the detection light emitted from the infrared light emitting unit 20 to some extent, since the spectrum of the infrared detection light is wide, the energy reduction degree after passing through the insulating protective layer 503 is much smaller than the visible light emitted from the display light emitting unit 10; therefore, the infrared light sensing unit 30 is integrated inside the driving circuit substrate 50, so that the problem of the bottom noise generated by the display light emitting unit 10 can be reduced, and the accuracy of sensing the infrared light sensing gesture is improved. It should be noted that, the infrared light emitting unit 20 may also be electrically connected to the driving circuit substrate 50, and the driving circuit substrate 50 provides a switch control signal for the infrared light emitting unit 20, so that the high integration of various driving circuits in the display screen 100 may be improved.
Optionally, fig. 4 is a schematic partial structure diagram of a display screen provided in 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 disposed at the same layer; the photosensitive detection area SA includes at least one unit sensing area USA, and the unit sensing area USA includes 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 unit sensing area USA. Specifically, with reference to fig. 4, a plurality of unit sensing regions USA are distributed in an array in the photosensitive detection region SA, the unit sensing regions 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 regions USA. With such a design, when the sizes of the infrared light emitting unit 20 and the display light emitting unit 10 are the same, the infrared light emitting unit 20 can be set at the position originally used for setting the display light emitting unit 10 without affecting 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 for fixing the infrared light-emitting unit 20 is not required to be additionally arranged, the structure of the display screen can be simplified, the cost of the display screen is reduced, and the display screen has higher screen occupation ratio; moreover, the design can avoid generating visual effect dark spots, and has small influence on the display brightness. It should be noted that the number of the infrared light sensing units 30 surrounding the periphery of the unit sensing region USA may not be limited; when the infrared light sensing units 30 can be uniformly distributed in equal intervals around the periphery of the unit sensing area USA, it is more beneficial to improve the accuracy and sensitivity of infrared detection.
Further alternatively, referring to fig. 4, in the unit sensing region 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 arranged on the periphery of one infrared light emitting unit 20, the infrared light emitting unit 20 is arranged substantially at the center of the unit sensing region USA; the intensity of the infrared light that can be received by the infrared light sensing units 30 at the positions on the periphery of the unit sensing area USA is kept substantially uniform; in addition, keep apart through showing luminescence unit 10 between infrared luminescence unit 20 and the infrared light sensing unit 30, can prevent that infrared light sensing unit 30 from directly receiving infrared luminescence unit 20 and sending and through the infrared contrast light influence of refraction, promote infrared detection's degree of accuracy and sensitivity. It should be noted that in other embodiments, M may be selectively set to 14:2, 8:1, etc. within 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 orthographic projection of the infrared light emitting unit 20 on the display screen 100 cannot be too far away from the infrared light sensing unit 30, for example, 2 to 3 display light emitting units 10 are spaced between the orthographic projection of the infrared light emitting unit 20 on the display screen 100 and the infrared light sensing unit 30; on the premise of implementing the infrared detection function, the number of the display light-emitting units 10 between the orthographic 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.
Alternatively, fig. 5 is a schematic structural diagram of a display screen provided in an embodiment of the present application, and fig. 6 is a cross-sectional view BB' of the display screen provided in the embodiment of fig. 5; referring to fig. 5 and 6, the display panel 100 further includes a flexible circuit board 70, 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 screen 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 at least a portion of the infrared light emitting unit 20 and the infrared light sensing unit 30 are not overlapped.
Specifically, with continuing reference to fig. 5 and fig. 6, the display panel 100 includes the driving circuit substrate 50 and the 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 panel 100. The display light-emitting unit 10 is electrically bound and connected with the driving circuit substrate 50, and the infrared light-emitting unit 10 is electrically bound and connected 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; thus, the different-layer arrangement of the display light-emitting unit 10 and the infrared light-emitting unit 20 can be realized, and the arrangement space of the display light-emitting unit 10 is prevented from being occupied by the infrared light-emitting unit 20 on the basis of ensuring the infrared detection function of the display screen 100, so that the display screen 100 keeps 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 can be received by the infrared light sensing unit 30 after being reflected by a touch object when the touch object exists, and a corresponding infrared detection function is realized.
It should be noted that, because 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 the driving circuit substrate 50 and the display light-emitting unit 10 blocking the infrared detection light emitted by the infrared light-emitting unit 20, both 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 separately disposed on the flexible circuit board 7, the size of the infrared light emitting units 10 may be larger than that of normal LEDs, the number of the infrared light emitting units may also be set larger than that of the infrared light emitting units integrated inside the display screen, the area of the flexible circuit board 70 may be set to be equivalent to the size of the display screen 100, and a plurality of infrared light emitting units 10 may be uniformly distributed on the surface of the whole flexible circuit board 70; therefore, the present application does not impose an absolute limit on the number and size of the infrared light emitting units 10 in the case of this embodiment.
Further alternatively, referring to fig. 6, the driving circuit substrate 50 further includes a light shielding portion 90, and 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 arranged on the light emitting direction path of the infrared light emitting unit 20, and the shading cloth 90 is arranged on the light transmission path, the infrared detection light emitted by the infrared light emitting unit 20 can be prevented from directly irradiating the infrared light sensing unit 30, so that the judgment of a normal detection signal is interfered, and the precision and the accuracy of the infrared detection function are influenced. The light shielding portion 90 may be formed by using the same process as the light shielding film layer originally formed inside the driving circuit board 50; for example, it is made of an LSM layer located below a Thin Film Transistor (TFT) active layer that serves as a switching circuit inside the driver circuit substrate 50. In other embodiments, the light shielding portion may be a black light shielding film layer or a black light shielding adhesive attached to the back surface of the driving circuit board 50.
Optionally, with reference 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 side wall 101 facing the adjacently disposed infrared light sensing unit 30, and the visible light shielding structure 40 at least partially covers the side wall 101 of the display light emitting unit 10.
Specifically, referring to fig. 3, the visible light shielding structure 40 covers the sidewall 101 of the display light emitting unit 10, and in general, the light emitting angle of the display light emitting unit 10 is about 120 degrees, and not only the emergent light directly faces the display screen 100 in the light emitting direction Z, but also the obliquely emergent light forming a certain angle with the light emitting direction Z; according to the reflection distance of light, the visible light emergent rays with the ray emergent angles close to the infrared light sensing unit 30 side are easily reflected by fingers and then irradiate above the infrared light sensing unit 30; the visible emergent light rays with the light ray emergent angle directly upward or away from the infrared light sensing unit 30 side cannot be reflected to the upper part of the infrared light sensing unit 30; therefore, when the visible light shielding structure 40 covers the side wall 101 of the display light emitting unit 10 close to the infrared light sensing unit 30, the visible light emergent rays with the ray emergent angles close to the infrared light sensing unit 30 side can be blocked; the light sensing accuracy of the display screen 100 is not adversely affected by the noise light. It will be appreciated that the light is noisy, except for infrared reflected light formed by reflections from the sensing body. It should be noted 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 to partially cover.
Optionally, fig. 7 is a schematic structural diagram of a display screen provided in the embodiment of the present application; FIG. 8 is a cross-sectional view of a CC' of the display provided in the embodiment of FIG. 7; referring to fig. 7 and 8, the display light-emitting unit 10 includes at least two color sub light-emitting units 101/102/103; in a direction parallel to the light emitting surface of the display screen 100, the visible light shielding structure 40 may be located between any adjacent color sub-light emitting units 101/102/103, and/or between the color sub-light emitting unit 101/102/103 and the infrared light emitting unit 20, and/or between the color sub-light emitting unit 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.
Specifically, with continuing reference to fig. 7 and 8, the display light-emitting unit 10 includes a color sub-light-emitting unit 101/102/103 arranged in an array, the color sub-light-emitting unit 101/102/103 may include a green light-emitting chip 101, a red light-emitting chip 102 and a blue light-emitting chip 103, the green light-emitting chip 101, the red light-emitting chip 102 and the blue light-emitting chip 103 are used to provide the basic three primary colors for the display panel 100 to display image pixels; in order to avoid crosstalk of light rays between adjacently disposed display light emitting cells 10, a visible light shielding structure 40 is disposed between any adjacently disposed color sub light emitting cells 101/102/103; in addition, the visible light shielding structure 40 is arranged between the color sub-light-emitting unit 101/102/103 and the infrared light-emitting unit 20, so that refraction interference between different light-emitting units can be avoided, the purity of infrared detection light is guaranteed, and the infrared gesture sensing precision is improved; and/or between the color sub-lighting unit 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 unit 101/102/103 and the infrared light sensing unit 30, the light of the color sub-light emitting unit 101/102/103 can be blocked from being sensed by the infrared light sensing unit 30; the light sensing accuracy of the display screen 100 is not adversely affected by the noise light. It should be noted 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 embodiments, which are not shown, an optional portion may be disposed between the color sub light emitting unit 101/102/103, the infrared light emitting unit 20, and the infrared light sensing unit 30.
In the visible light of three colors of red, green and blue, the wavelength of red light is longest, the wavelength of green light is second, and the wavelength of blue light is shortest, that is, the blue light is most easily excited to generate infrared light/ultraviolet light, so that the blue light emitting chip 103 emitting blue light can be disposed at the farthest position from the infrared light emitting unit 20, the green light emitting chip 103 emitting green light is second, and the red light emitting chip 102 emitting red light can be disposed at the closest position to the infrared light emitting unit 20, thereby effectively avoiding generating more noise light, and being beneficial to ensuring the accuracy of infrared detection.
Further alternatively, see 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 blocking wall is made of the black organic film or the ink material, so that the interference of noise light on the infrared light sensing unit 30 can be weakened or even eliminated, the sensing precision and accuracy of the display screen can be ensured, and the production cost can be saved.
Optionally, fig. 9 is a schematic structural diagram of a display screen provided in the embodiment of the present application; FIG. 10 is a DD' cross-sectional view of the display screen provided in the embodiment of FIG. 9; please refer to fig. 9 and 10; in the light outgoing direction Z towards the display screen 100, the visible light shielding structure 40/401 is located above the infrared light sensing unit 30 and covers the light sensing surface 301 of the infrared light sensing unit 30.
Specifically, with continued reference to fig. 9 and 10, the ir sensing unit 30 includes an upper surface 301 facing the light emitting side of the display screen 100, where the upper surface 301 is the light sensing surface of the ir sensing unit 30 for sensing light; if the noise light cannot reach the light sensing surface 301 to be sensed, the interference of the noise light to the infrared light sensing unit 30 can be eliminated; by directly arranging 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 the visible light can be intercepted, the infrared detection light cannot be blocked and received by the photosensitive surface, and the sensing precision and accuracy of the infrared light sensing gesture recognition of the display screen 100 can be ensured.
It should be noted that, because the wavelength of the infrared light is usually not less than 900nm, the transmittance of the visible light shielding structure 401 to the light with the wavelength not less than 900nm is not less than 90%, and the transmittance to 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 optical signal in the optical signals received by the infrared optical sensing unit 30, improve the light sensing identification precision of the display screen 100, and improve the user experience. However, the present application is not limited thereto, as the case may be.
Specifically, referring to fig. 9 and fig. 10, it can be seen that the light shielding structure 401 may be made of a light shielding layer made of plastic (such as Polycarbonate, PC for short), acrylic (such as polymethyl Methacrylate, PMMA for short), silicon, germanium, or an infrared light transmitting film, which is not limited in this application and is determined according to the circumstances.
Further optionally, fig. 11 is a schematic structural diagram of a display screen provided in an embodiment of the present application; as shown in fig. 8, in addition to covering and disposing the visible light shielding structure 401 above the infrared light sensing unit 30, a visible light shielding structure 402 may also be disposed between the adjacent color sub-light emitting units 101/102/103, the color sub-infrared light emitting units 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 provided in the embodiment of the present application; FIG. 13 is a cross-sectional view of a QQ' of the display screen provided in the embodiment of FIG. 12; referring to fig. 12 and 13, in the light outgoing direction Z toward the display panel 100, the visible light shielding structure 40 includes at least two stacked color resistors 403/404, a color resistor 403/404 includes a blue color resistor 404 and a red color resistor 403, and a color resistor 403/404 is located above the infrared light sensing unit 30 and covers the light sensing surface of the infrared light sensing unit 30.
Specifically, two layers of color resistors 403/404, namely, a blue color resistor 404 and a red color resistor 403, are stacked above the infrared light sensing unit 30, and according to the optical test data, please refer to fig. 14, where fig. 14 is the test data of the transmittance of light rays by the stacked blue color resistor 404 and red color resistor 403; the blue color resistor 404 and the red color resistor 403 which are overlapped can isolate most visible light under 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 light sensing surface of the infrared light sensing unit 30, the combination with the Mini LED display screen can not only realize the infrared light and infrared gesture function, but also isolate the visible scattered light of the surrounding Mini LEDs 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 is improved.
Further alternatively, with reference to fig. 13, the surface of the driving circuit substrate 50 facing the light-emitting surface side of the display panel 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 panel 100; the color resists 403/404 are disposed in the openings 504 above the ir sensing units 30, which on one hand can ensure the flatness of the upper surface of the driving circuit substrate 50, and is beneficial to improving the yield rate of the display light-emitting units 10 and the ir light-emitting units 20 greatly transferred to the driving circuit substrate 50; on the other hand, the problem of color cast of the display screen 100 is avoided; since the side light of the display light-emitting unit 10 is irradiated to the color resistor 403/404 and filtered, the color shift phenomenon can be observed by human eyes because the stacked double-layer color resistor 403/404 only filters part of the wavelength band of visible light.
Optionally, fig. 15 is a schematic structural diagram of a display screen provided in the embodiment of the present application; referring to fig. 15, the display panel 100 further includes a display panel 11 and at least one diffusion film 60; in the light outgoing direction Z of the display panel 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 screen 100 is a passive light emitting type liquid crystal display panel, the display screen 100 should be further provided with a backlight module 12; the display light-emitting unit 10 disposed 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. It should be noted that the display light emitting unit 10 in this case may be a Mini LED arranged in a direct-down type array. On the side of the driving circuit substrate 50 close to the display panel 11, the display screen 100 further includes a layer of diffusion film 60, that is, the diffusion film 60 is located on the side of the light emitting surface of the display light emitting unit 10, and the diffusion film can make the brightness of the light output from the Mini-LED light emitting unit more uniform after the light passes through the diffusion film, so as to avoid the firefly phenomenon. In addition, when the infrared light emitting unit 20 is also integrated in the backlight module 12, the diffusion film 60 made of transparent infrared material can avoid shielding the infrared detection light, which is beneficial to ensuring the accuracy of infrared detection.
Fig. 16 is a schematic structural diagram of a display device according to an embodiment of the present disclosure. As shown in fig. 16, the display device 200 provided in the present embodiment includes the display screen 100 provided in the above embodiment. The embodiment of fig. 16 only uses a mobile phone as an example to describe the display device 200, and it should be understood that the display device 200 provided in the embodiment of the present invention may be other display devices 200 having a display function, such as a computer, a television, and a vehicle-mounted display device, and the present invention is not limited thereto. The display device 200 provided in the embodiment of the present invention has the beneficial effects of the display screen provided in the embodiment of the present invention, and specific reference may be made to the specific description of the display screen 100 in the foregoing embodiments, which is not repeated herein.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements and substitutions will now be apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (16)
1. A display screen, comprising: the display device comprises a display area and a non-display area at least partially surrounding the display area, wherein at least part of the display area is a photosensitive detection area;
the display area comprises a plurality of display light-emitting units arranged in an array, at least one infrared light-emitting unit and at least one infrared light sensing unit;
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 layer heights and are not overlapped;
and the visible light shielding structure is positioned between the display light emitting unit and the infrared light sensing unit.
2. The display screen of claim 1, wherein: also comprises the following steps of (1) preparing,
the display light-emitting unit is electrically connected with the driving circuit substrate;
the display light-emitting unit is positioned on one side, facing the light-emitting surface of the display screen, of the driving circuit substrate, and the infrared light sensing unit is positioned in the driving circuit substrate.
3. The display screen of 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 manner, and a plurality of infrared light sensing units which are arranged around the periphery of the unit sensing area.
4. A display screen according to claim 3, wherein:
in the unit sensing region, the display light-emitting unit is arranged around the infrared light-emitting unit, the number ratio of the display light-emitting unit to the infrared light-emitting unit is M, and M is greater than or equal to 4: 1.
5. The display screen of claim 2, wherein: the display screen also comprises a flexible circuit soft board, and the flexible circuit soft board is positioned on one side of the backlight surface of the drive circuit substrate;
in the light emitting direction of the display screen, the infrared light emitting unit is located between the flexible circuit soft board and the drive circuit substrate and bound with the flexible circuit soft board, and at least part of the infrared light emitting unit and the infrared light sensing unit are not overlapped.
6. The display screen of claim 5, wherein: the drive circuit substrate further comprises a light shielding part, and the light shielding part is positioned on one side, facing the infrared light emitting unit, of the infrared light sensing unit.
7. The display screen of claim 2, wherein: in a direction parallel to the light emitting surface of the display screen, the display light emitting unit comprises a side wall facing the adjacent infrared light sensing unit, and the visible light shielding structure at least partially covers the side wall of the infrared light sensing unit.
8. The display screen of claim 2, wherein: the display light-emitting unit comprises at least two color sub light-emitting units; in the direction parallel to the light-emitting surface of the display screen, the visible light shielding structure can be located between the 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 unit and the infrared light sensing unit, which are arranged adjacently.
9. A display screen according to claim 7 or 8, characterised in that: the visible light shielding structure is a light absorbing material.
10. The display screen of claim 2, wherein: and 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 the light emergent direction of the display screen.
11. The display screen of claim 10, wherein: the material of the visible light shielding structure comprises at least one of plastic, alexandric, silicon, germanium or infrared-transmitting film.
12. The display screen of claim 2, wherein: orientation in the light-emitting direction of display screen, visible light shielding structure includes the colored look of two-layer range upon range of setting at least and hinders, colored look hinders including blue look and hinders and red look, colored look hinders and is located infrared light sensing unit top, and cover infrared light sensing unit's sensitization surface.
13. The display screen of claim 12, wherein: the surface of the driving circuit substrate facing the light emitting surface side of the display screen comprises at least one opening, and at least part of the color resistor is positioned in the opening.
14. The display screen of claim 2, wherein: the display screen also comprises a display panel and at least one layer of diffusion film; in the light emergent direction of the display screen, the driving circuit substrate, the diffusion film and the display panel are arranged in a laminated mode; the diffusion film is made of infrared light transmitting materials.
15. 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.
16. A display device comprising a display screen according to any one of claims 1 to 15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210307367.2A CN114740994A (en) | 2022-03-25 | 2022-03-25 | Display screen and display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210307367.2A CN114740994A (en) | 2022-03-25 | 2022-03-25 | Display screen and display device |
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| CN114740994A true CN114740994A (en) | 2022-07-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210307367.2A Pending CN114740994A (en) | 2022-03-25 | 2022-03-25 | Display screen and display device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| EP4343836A3 (en) * | 2022-09-22 | 2024-04-10 | InnoLux Corporation | Electronic device and related tiled electronic device |
-
2022
- 2022-03-25 CN CN202210307367.2A patent/CN114740994A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4343836A3 (en) * | 2022-09-22 | 2024-04-10 | InnoLux Corporation | Electronic device and related tiled electronic device |
| 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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