CN112286387B - Display panel and display device - Google Patents
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- CN112286387B CN112286387B CN202011176775.6A CN202011176775A CN112286387B CN 112286387 B CN112286387 B CN 112286387B CN 202011176775 A CN202011176775 A CN 202011176775A CN 112286387 B CN112286387 B CN 112286387B
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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
- G06F3/0412—Digitisers structurally integrated in a display
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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
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/15—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components having potential barriers, specially adapted for light emission
- H01L27/153—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components having potential barriers, specially adapted for light emission in a repetitive configuration, e.g. LED bars
- H01L27/156—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components having potential barriers, specially adapted for light emission in a repetitive configuration, e.g. LED bars two-dimensional arrays
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Abstract
The invention discloses a display panel and a display device, which relate to the technical field of display and comprise: a substrate; the display area comprises an infrared assembly and a first light-emitting element which are positioned on the same side of the substrate, and the infrared assembly comprises a second light-emitting element and a photosensitive element; the display panel also comprises a first retaining wall and a second retaining wall; at least part of the orthographic projection of the first retaining wall/the second retaining wall on the substrate is positioned between the orthographic projection of the first light-emitting element/the second light-emitting element on the substrate and the orthographic projection of the photosensitive element on the substrate; because the photosensitive element is at least partially overlapped with the first retaining wall/the second retaining wall along the direction in which the first light-emitting element/the second light-emitting element points to the photosensitive element, the first retaining wall can shield the visible light emitted by the first light-emitting element, and the adverse effect on touch control caused after the visible light is received by the photosensitive element is avoided; meanwhile, the second baffle wall can shield the lateral light emitting of the second light emitting element, and the accuracy of infrared touch control is guaranteed.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display panel and a display device.
Background
With the development of display technology, display panels with touch control function have gradually spread to every corner of our lives. According to different sensing principles, touch screens can be generally classified into resistive type, capacitive type and infrared type, wherein the infrared type touch screen is not interfered by current, voltage and static electricity, can be used in severe environments, and is widely applied to electronic equipment such as mobile phones and tablet computers.
Specifically, when a touch subject such as a finger performs a touch 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 touch action of a user is detected and positioned according to the current signal or the voltage signal.
However, light emitted from the pixel units for displaying in the display panel interferes with the photosensitive element, thereby reducing the accuracy of infrared touch control.
Disclosure of Invention
The invention provides a display panel and a display device, which are used for reducing adverse effects of light rays emitted by pixel units on photosensitive elements and improving accuracy of infrared touch.
In a first aspect, the present application provides a display panel comprising:
a substrate;
the display area comprises an infrared assembly and a first light-emitting element with at least one light-emitting color, the infrared assembly and the first light-emitting element are positioned on the same side of the substrate, and the infrared assembly comprises a second light-emitting element and a photosensitive element;
the display panel also comprises a first retaining wall and a second retaining wall; at least part of the orthographic projection of the first retaining wall on the substrate is positioned between the orthographic projection of the first light-emitting element on the substrate and the orthographic projection of the photosensitive element on the substrate, and at least part of the orthographic projection of the second retaining wall on the substrate is positioned between the orthographic projection of the second light-emitting element on the substrate and the orthographic projection of the photosensitive element on the substrate;
the photosensitive element is at least partially overlapped with the first retaining wall along the direction that the first light-emitting element points to the photosensitive element, and the photosensitive element is at least partially overlapped with the second retaining wall along the direction that the second light-emitting element points to the photosensitive element; along the perpendicular to the direction of base plate place plane, the height more than or equal to of first barricade the height of second barricade.
In a second aspect, the present application further provides a display device, which includes the display panel provided in the first aspect.
Compared with the prior art, the display panel and the display device provided by the invention at least realize the following beneficial effects:
the application provides a display panel and display device includes infrared subassembly, first light emitting component, first barricade and second barricade, and wherein, infrared subassembly includes second light emitting component and light sensitive element. Because at least part of the orthographic projection of the first retaining wall on the substrate is positioned between the orthographic projection of the first light-emitting element on the substrate and the orthographic projection of the photosensitive element on the substrate, and the photosensitive element and the first retaining wall are at least partially overlapped along the direction in which the first light-emitting element points to the photosensitive element, the first retaining wall can shield the visible light emitted by the first light-emitting element, and the visible light is prevented from interfering the photosensitive element; meanwhile, at least part of the orthographic projection of the second retaining wall on the substrate is positioned between the orthographic projection of the second light-emitting element on the substrate and the orthographic projection of the photosensitive element on the substrate, so that the lateral light-emitting of the second light-emitting element can be shielded, and the accuracy of infrared touch control is further ensured.
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 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 panel according to an embodiment of the present disclosure;
FIG. 2 is a cross-sectional view of a display panel of the embodiment of FIG. 1, showing a cross-section CC';
fig. 3 is a diagram illustrating a relative position relationship between a first light emitting element and an infrared assembly according to an embodiment of the present application;
fig. 4 is a diagram illustrating another relative position relationship between the first light-emitting element and the infrared module according to an embodiment of the present disclosure;
FIG. 5 is a schematic diagram of an infrared assembly provided in the embodiment of FIG. 1;
FIG. 6 is a partial schematic view of the display panel provided in the embodiment of FIG. 1;
FIG. 7 is a partial schematic view of another display panel provided in the embodiment of FIG. 1;
FIG. 8 is a cross-sectional view of another CC' of the display panel of the embodiment of FIG. 1;
FIG. 9 is a cross-sectional view of another CC' of the display panel of the embodiment of FIG. 1;
fig. 10 is a schematic structural diagram of a display device according to an embodiment of the present disclosure.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
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.
In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values.
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 panel provided in an embodiment of the present application, and fig. 2 is a cross-sectional view CC' of the display panel provided in the embodiment of fig. 1. As shown in fig. 1-2, the present application provides a display panel 100 comprising:
a substrate 10;
a display area AA including an infrared assembly 101 and a first light emitting element L1 of at least one emission color, the infrared assembly 101 and the first light emitting element L1 being located on the same side of the substrate 10, the infrared assembly 101 including a second light emitting element 101a and a photosensitive element 101b;
the display panel 100 further includes a first barrier B1 and a second barrier B2; at least part of the orthographic projection of the first retaining wall B1 on the substrate 10 is positioned between the orthographic projection of the first light-emitting element L1 on the substrate 10 and the orthographic projection of the photosensitive element 101B on the substrate 10, and at least part of the orthographic projection of the second retaining wall B2 on the substrate 10 is positioned between the orthographic projection of the second light-emitting element 101a on the substrate 10 and the orthographic projection of the photosensitive element 101B on the substrate 10;
the photosensor 101B at least partially overlaps the first bank B1 in a direction in which the first light emitting element L1 is directed toward the photosensor 101B, and the photosensor 101B at least partially overlaps the second bank B2 in a direction in which the second light emitting element 101a is directed toward the photosensor 101B; along the direction z perpendicular to the plane of the substrate 10, the height H1 of the first wall B1 is greater than or equal to the height H2 of the second wall B2.
Specifically, referring to fig. 1, the display panel 100 includes a display area AA and a non-display area NA at least partially surrounding the display area AA, the display area AA includes a first light emitting device L1 and an infrared device 101, the infrared device 101 includes a second light emitting device 101a and a photosensitive device 101b, and the second light emitting device 101a can be used as a light source for touch control. Specifically, after the light emitted by the second light emitting element 101a is irradiated to a touch subject such as a finger, the light is reflected by the touch subject to form reflected light and received by the photosensitive element 101b, the photosensitive element 101b can perform photoelectric conversion on the received reflected light to form a current/voltage signal, and the touch IC detects and positions the touch action according to the current signal or the voltage signal, thereby implementing the touch function of the display panel 100. Of course, the touch subject is not limited to a finger, and may be a palm, a finger joint, or the like.
Optionally, in the display panel 100 provided in this embodiment, a first retaining wall B1 is further disposed in the display area AA. Specifically, at least a part of the orthographic projection of the first retaining wall B1 on the substrate 10 is located between the orthographic projection of the first light-emitting element L1 on the substrate 10 and the orthographic projection of the photosensitive element 101B on the substrate 10, and along the direction that the first light-emitting element L1 points to the photosensitive element 101B, the photosensitive element 101B is at least partially overlapped with the first retaining wall B1, wherein the direction that the first light-emitting element L1 points to the photosensitive element 101B is perpendicular to the arrangement direction of the first light-emitting elements L1, that is, the first direction y shown in fig. 1 or the direction opposite to the first direction y, by arranging the first retaining wall B1 between the first light-emitting element L1 and the photosensitive element 101B, the emergent light of the first light-emitting element L1 can be blocked from reaching the photosensitive element 101B, and the adverse effect of noise light on the touch accuracy of the display panel is avoided. It should be understood that the light rays are noise light except for reflected light formed by reflection by the touching body.
In addition, a second blocking wall B2 is further disposed in the display area AA, at least a portion of an orthographic projection of the second blocking wall B2 on the substrate 10 is located between an orthographic projection of the second light emitting element 101a on the substrate 10 and an orthographic projection of the photosensitive element 101B on the substrate 10, and along a direction in which the second light emitting element 101a points at the photosensitive element 101B, the photosensitive element 101B and the second blocking wall B2 are at least partially overlapped, wherein a direction in which the second light emitting element 101a points at the photosensitive element 101B is parallel to an arrangement direction of the first light emitting elements L1, that is, a first direction x shown in fig. 1 or a direction opposite to the first direction x. Obviously, the second blocking wall B2 is disposed between the photosensitive element 101B and the second light emitting element 101a, so that the light emitted from the second light emitting element 101a in the lateral direction can be blocked, thereby further avoiding the interference of the noise light to the photosensitive element 101B and ensuring the touch precision.
As shown in fig. 2, since the first light emitting elements L1 are arranged in an array along the first direction x and the second direction y, the first light emitting elements L1 may be disposed on both sides of the photosensor 101B in the second direction y, and in order to block noise light generated by the first light emitting elements L1, first barriers B1 may be respectively added on both sides of the photosensor 101B; similarly, when a plurality of infrared assemblies 101 are adjacently arranged along the first direction x, the second light emitting elements 101a may be disposed on both sides of the photosensitive element 101B in the first direction x, and at this time, the second retaining walls B2 may be disposed on both sides of the photosensitive element 101B, so as to eliminate noise light interference caused by the adjacent light emitting elements.
Optionally, with reference to fig. 2, in the embodiment, the height H1 of the first retaining wall B1 is greater than or equal to the height H2 of the second retaining wall B2. Since the first bank B1 functions to block the light of the first light emitting element L1 from being received by the photosensor 101B, setting the height H1 thereof to be larger is advantageous to block more noise light; meanwhile, the second blocking wall B2 only blocks the light emitted from the second light emitting device 101a in the lateral direction, and if the height H2 is set too large, a part of the reflected light may be blocked from reaching the photosensitive device 101B, and the loss of the light intensity of the reflected light may adversely affect the touch sensitivity. Therefore, in the embodiment, the height H1 of the first retaining wall B1 is greater than or equal to the height H2 of the second retaining wall B2, so that the interference of noise light can be eliminated, and the accuracy of the touch function in the display panel 100 is improved.
It should be noted that fig. 2 is only used to illustrate the relative positions of the first light emitting device L1, the first retaining wall B1, the second retaining wall B2, and the infrared assembly 101 and the substrate 10, and does not represent an actual film structure, and in fact, the display panel 100 may further include other films, for example, an array layer located between the first light emitting device L1 and the substrate 10.
Fig. 3 and 4 are diagrams illustrating a relative position relationship between the first light emitting element and the infrared assembly provided in the embodiment of fig. 1. Referring to fig. 3 and 4, the second light emitting element 101a may be disposed adjacent to the photosensitive element 101b, or may be disposed between the first light emitting elements L1, but it is sufficient if a retaining wall is disposed between the first light emitting element L1 and the photosensitive element 101b, or between the second light emitting element 101a and the photosensitive element 101b. The present embodiment does not limit the relative positional relationship between the infrared assembly 101 and the first light-emitting element L1.
In addition, the characteristics which are not mutually conflicted in the application can be mutually combined, and the combined technical scheme is within the protection scope of the application.
Optionally, the first light emitting element L1 is a Micro LED or a Mini LED, and the second light emitting element 101a is an infrared/ultraviolet Micro LED or an infrared/ultraviolet Mini LED.
Specifically, the touch light source of the display panel 100 may be infrared light or ultraviolet light, and since the visible light range of human eyes is 380 to 780nm, and the infrared light/ultraviolet light with the wavelength greater than 780nm is invisible, the normal display of the display panel 100 is not affected by the touch function realized by using the infrared light/ultraviolet light. Fig. 5 is a schematic structural diagram of an infrared module provided in the embodiment of fig. 1. Referring to fig. 5, taking the touch light source as infrared light and the photo sensor 101b as an infrared photo resistor as an example, in the display portion, two ends of the first light emitting element L1 are respectively connected to the display data line DL1 and the display scan line GL1 to realize a display function, in the touch portion, an anode of the second light emitting element 101a is connected to the power line VDD, a cathode of the second light emitting element is connected to the touch data line DL2, a first end of the infrared photo resistor 101b is connected to the power line VDD, and a second end of the infrared photo resistor 101b is connected to the touch scan line GL 2; when a user performs touch operation, reflected light formed by finger reflection irradiates the infrared photosensitive resistor, the resistance value of the infrared photosensitive resistor is rapidly reduced, a larger current/voltage signal is read on the touch data line DL2, and then the touch IC performs more accurate positioning and identification on a touch point according to the magnitude of the current/voltage signal. In addition, if the touch light source is ultraviolet light, the photosensitive element 101b may use an ultraviolet photodiode.
It should be noted that, in order to clearly embody the connection relationship between the first light-emitting element L1 and the infrared module 101, the first retaining wall B1 and the second retaining wall B2 are not shown in fig. 5, but it is not shown that the first retaining wall B1 and the second retaining wall B2 are not disposed between the first light-emitting element L1 and the photosensitive element 101B and between the second light-emitting element 101a and the photosensitive element 101B.
It should be understood that in the present embodiment, the first light emitting element L1 is a Micro LED, and the second light emitting element 101a is an infrared/ultraviolet Micro LED, or the first light emitting element L1 is a Mini LED, and the second light emitting element 101a is an infrared/ultraviolet Mini LED, so that the first light emitting element L1 and the second light emitting element 101a may share a huge transfer process in a manufacturing process, which not only can simplify a manufacturing process and save a production cost, but also is beneficial to ensuring a product yield and reliability. Of course, in some other embodiments of the present application, the first light emitting element L1 may also be an OLED, and the second light emitting element 101a selects an OLED emitting infrared light/ultraviolet light accordingly. The Micro LED is an inorganic light emitting diode with a chip size of less than 100 micrometers, and the Mini LED is an inorganic light emitting diode with a chip size of 100-500 micrometers.
It should be noted that, besides the photodiode, other photosensors 101b may be used in the display panel 100 provided in this embodiment, as long as the characteristics of the photosensor 101b change after being irradiated by light with a specific wavelength, for example, the photodiode which is turned on under irradiation of the specific wavelength. This embodiment is not limited to this.
Optionally, as shown in fig. 2, along a direction z perpendicular to the plane of the substrate 10, the height H1 of the first retaining wall B1 is greater than the height H1 of the first light emitting element L1.
Specifically, the height H1 of the first wall B1 is greater than the height H1 of the first light emitting element L1 in the direction perpendicular to the plane of the substrate 10. Illustratively, when the first light emitting element L1 is a Micro LED, the height H1 thereof is about 10 μm, and then the height H1 of the first bank B1 may be set to 10 μm to 15 μm. It is understood that although the sensitive wavelength of the photosensitive element 101b is mainly focused in the wavelength range of the light emitted by the selected infrared/ultraviolet Micro LED or infrared/ultraviolet Mini LED, the interference of the visible light emitted by the first light emitting element L1 cannot be completely avoided. Therefore, after the first bank B1 is disposed, the visible light emitted from the first light-emitting element L1 can be blocked, so as to prevent the noise light from being received by the photosensor 101B and affecting the touch accuracy of the display panel 100.
Further, as shown in fig. 4, the orthographic projection of the first retaining wall B1 on the substrate 10 can also completely surround the orthographic projection of the photosensitive element 101B on the substrate 10, and this design can make the first retaining wall B1 block the light emitted by the first light-emitting element L1 from reaching the photosensitive element 101B from all directions, completely block the noise light generated by the first light-emitting element L1, thereby ensuring the touch accuracy.
Optionally, with reference to fig. 2, along the direction z perpendicular to the plane of the substrate 10, the height H2 of the second retaining wall B2 is smaller than the height H2 of the second light emitting element 101 a.
Specifically, the second light emitting element 101a may adopt an infrared/ultraviolet Micro LED or an infrared/ultraviolet Mini LED, and after the second retaining wall B2 is disposed between the second light emitting element 101a and the photosensor 101B, the second retaining wall B2 can effectively block the lateral light emission of the second light emitting element 101 a. In this embodiment, taking the second light emitting element 101a as an infrared/ultraviolet Micro LED as an example, the height of the second light emitting element is about 10 μm along the direction z perpendicular to the plane of the substrate 10, and the height H2 of the second retaining wall B2 is slightly less than the height H2 of the second light emitting element 101a and can be set to be 3um to 10um. It should be understood that if the height H2 of the second blocking wall B2 is too small, the lateral light emitting of the second light emitting element 101a cannot be completely blocked; if the height H2 of the second barrier B2 is too large, a part of the reflected light formed after being reflected by the finger may be blocked from reaching the photosensor 101B, and the loss in light intensity may cause a decrease in touch sensitivity; therefore, in this embodiment, the height H2 of the second retaining wall B2 is set to 3um to 10um, so that on one hand, the lateral light emitting of the second light emitting element 101a can be completely blocked, and on the other hand, the accuracy and sensitivity of the infrared touch control are also considered.
Of course, as shown in fig. 4, in some other embodiments of the present application, the orthographic projection of the second bank B2 on the substrate 10 may also completely surround the orthographic projection of the second light emitting element 101a on the substrate 10, that is, the second bank B2 is disposed around the second light emitting element 101a so as to block the noise light of the second light emitting element 101a from reaching the photosensor 101B in all directions. The shape of the first retaining wall B1 and the second retaining wall B2 is not limited in this embodiment.
Fig. 6 is a partial schematic view of the display panel provided in the embodiment of fig. 1. As shown in fig. 6, the width of the first bank B1 is d1 along the direction a in which the first light emitting device L1 points to the photosensor 101B, and the width of the second bank B2 is d2 along the direction B in which the second light emitting device 101a points to the photosensor 101B, where d1> d2.
It should be noted that, in this embodiment, the direction a of the first light emitting element L1 pointing to the photosensitive element 101B is perpendicular to the arrangement direction of the first light emitting element L1, the direction B of the second light emitting element 101a pointing to the photosensitive element 101B is parallel to the arrangement direction of the first light emitting element L1, the width d1 of the first retaining wall B1 refers to the dimension in the direction a of the first light emitting element L1 pointing to the photosensitive element 101B, and the width d2 of the second retaining wall B2 refers to the dimension in the direction B of the second light emitting element 101a pointing to the photosensitive element 101B.
Specifically, in order to block the visible light emitted from the display area AA and the lateral infrared/ultraviolet light of the second light emitting device 101a, a first retaining wall B1 is disposed between the first light emitting device L1 and the photosensor 101B, and a second retaining wall B2 is disposed between the second light emitting device 101a and the photosensor 101B, wherein a width d1 of the first retaining wall B1 is greater than a width d2 of the second retaining wall B2.
Optionally, the width d1 of the first retaining wall B1 is 30 to 100 μm. It should be understood that if the width d1 of the first retaining wall B1 is too small, the visible light emitted from the first light emitting element L1 cannot be blocked effectively, and if the width d1 of the first retaining wall B1 is too large (for example, greater than 100 μm), the area of the display area AA is occupied too much, and the pixel density of the display panel 100 is reduced, which affects the display effect. Therefore, in the embodiment, the width d1 of the first retaining wall B1 is set to be 30-100 μm, which not only ensures the accuracy of infrared touch control, but also is beneficial to improving the pixel density of the display panel 100.
Alternatively, the width d2 of the second retaining wall B2 is 20 to 50 μm. Since the wavelength of the infrared/ultraviolet light is longer and the diffraction is more likely to occur, the width d2 of the second retaining wall B2 cannot be set too small (for example, less than 20 μm), otherwise the lateral infrared/ultraviolet light of the second light emitting element 101a is likely to bypass the second retaining wall B2 and be received by the photosensitive element 101B. Meanwhile, if the width d2 of the second barrier B2 is set too large, a part of the finger-reflected light may be blocked from reaching the photosensor 101B, which reduces the touch accuracy of the display panel. Therefore, when the width d2 of the second retaining wall B2 is between 20 μm and 50 μm, the light intensity of the light reflected by the finger and the light diffracted by the second retaining wall B2 can be effectively balanced, which is more beneficial to improving the touch precision.
Of course, when actually manufacturing the display panel 100, the widths of the first retaining wall B1 and the second retaining wall B2 may be flexibly adjusted according to other process requirements such as pixel density and touch precision, which is not limited in this application.
Fig. 7 is another partial schematic view of the display panel provided in the embodiment of fig. 1. Optionally, referring to fig. 7, the display area AA includes a plurality of pixel groups P1 arranged in an array, each pixel group P1 includes n pixels P, each pixel P includes the first light emitting element L1 with at least one light emitting color, and one infrared component 101 is correspondingly disposed in one pixel group P1, where n is greater than or equal to 5 and less than or equal to 20.
Since the infrared devices 101 are disposed in the display area AA, if each pixel P corresponds to one infrared device 101, although the touch accuracy is ensured, the infrared devices 101 in large numbers occupy a larger area of the display area AA, which is equivalent to reducing the area for disposing the pixel P in the display area AA, thereby reducing the density of the pixel P of the display panel 100.
The inventor finds that, in the research process, when a user performs touch operation, the contact area between the finger belly and the display screen is about one square centimeter, so that one infrared component 101 can be arranged at intervals of 1-4 mm in the row direction and the column direction of the pixel P, that is, the infrared component 101 does not need to be correspondingly arranged for each pixel P. Specifically, the display area AA includes a plurality of pixel groups P1 arranged in an array, each pixel group P1 is composed of 5 to 20 pixels P, and each pixel group P1 is correspondingly provided with one infrared component 101.
Alternatively, as shown in fig. 6, the first light emitting element L1 includes at least a first sub light emitting element L11 and a second sub light emitting element L12, and the wavelength of the light of the first sub light emitting element L11 is greater than the wavelength of the light of the second sub light emitting element L12;
the minimum distance from the first sub light emitting element L11 to the second light emitting element 101a is D1, and the minimum distance from the second sub light emitting element L12 to the second light emitting element 101a is D2, where D1 < D2.
Specifically, the first light emitting element L1 may include a first sub light emitting element L11 and a second sub light emitting element L12 having different emission colors, for example, the emission color of the first sub light emitting element L11 is red, and the emission color of the second sub light emitting element L12 is green, wherein the wavelength of red light is longer than that of the green light emitting element. It should be understood that in the present embodiment, the first light emitting element L1 and the second light emitting element 101a may alternatively use Micro LEDs or Mini LEDs, and the LEDs are generally electroluminescent, and when a current flows, electrons and holes are recombined to emit photons. However, due to the short wavelength of visible light, when the light is irradiated to the infrared/ultraviolet Micro LED or the infrared/ultraviolet Mini LED, electrons directly absorb the energy of photons and transit to the excited state, and when the electrons fall back to the excited state, the excess energy is emitted in the form of photons, thereby forming infrared light/ultraviolet light with a longer wavelength. That is, the visible light emitted from the first and second sub light emitting elements L11 and L12 can excite the second light emitting element 101a to generate infrared/ultraviolet light, and the second sub light emitting element L12 having a shorter wavelength can excite the second light emitting element 101a to generate infrared/ultraviolet light more easily than the first sub light emitting element L11, and therefore, the second sub light emitting element L12 can be disposed at a position farther from the second light emitting element 101a, and the first sub light emitting element L11 can be disposed at a position closer to the second light emitting element 101 a.
Further, with continued reference to fig. 6, the pixel P includes a first sub light emitting element L11 emitting light of a red color, a second sub light emitting element L12 emitting light of a green color, and a third sub light emitting element L13 emitting light of a blue color. In the visible light of the 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/ultraviolet light, so the first light emitting element L1 emitting blue light can be disposed at the position farthest from the second light emitting element 101a, the first light emitting element L1 emitting green light is second, and the first light emitting element L1 emitting red light is disposed at the position closest to the second light emitting element 101a, that is, D1> D2> D3, and D3 represents the minimum distance from the third sub light emitting element L13 to the second light emitting element 101a, thus effectively avoiding the generation of more noise light, and being beneficial to ensuring the accuracy of infrared touch control.
In addition, in order to avoid the excitation of the second light emitting element 101a by the visible light to generate the infrared light/ultraviolet light, in the pixel P provided with the infrared component 101, the orthographic projection of the first bank B1 on the substrate 10 may be located between the orthographic projection of the three first light emitting elements L1 on the substrate 10, and the orthographic projection of the first light emitting elements L1 on the substrate 10 and the orthographic projection of the photosensitive elements 101B on the substrate 10, that is, the first bank B1 is extended along the arrangement direction of the first light emitting elements L1, so as to shield the visible light emitted by the first light emitting elements L1.
It should be noted that, in some other embodiments of the present application, each pixel P may further include four first light emitting elements whose light emitting colors are red, green, blue, and white, and in each pixel group P1, the infrared component 101 may be disposed corresponding to any one pixel P, and the infrared components in each pixel group P1 are disposed at the same position, which is more beneficial to uniformly improving the overall touch precision and sensitivity in the display area.
Optionally, with reference to fig. 2, the first retaining wall B1, the second retaining wall B2, the first light-emitting element L1 and the infrared assembly 101 are disposed in the same layer.
Specifically, the first retaining wall B1, the second retaining wall B2, the first light emitting element L1, the second light emitting element 101a and the photosensitive element 101B may be selectively fabricated on the same film layer, which greatly simplifies the fabrication process of the display panel 100; particularly, when the first light emitting element L1 is a Micro LED and the second light emitting element 101a is an infrared/ultraviolet Micro LED, or the first light emitting element L1 is a Mini LED and the second light emitting element 101a is an infrared/ultraviolet Mini LED, the first light emitting element L1 and the second light emitting element 101a can share a mass transfer process in the manufacturing process, so that the production cost can be saved, and the yield and reliability of products can be ensured; in addition, the present embodiment does not require an additional infrared light generating device, thereby reducing the thickness of the display panel 100 and facilitating the realization of low cost and thin display device.
Fig. 8 is a cross-sectional view of another CC' of the display panel provided in the embodiment of fig. 1. As shown in fig. 8, the first light emitting element L1, the second light emitting element 101a and the first retaining wall B1 are disposed on the same layer, and the photosensor 101B and the second retaining wall B2 are disposed on a side of the second light emitting element 101a away from the substrate 10.
Specifically, the photosensitive element 101B and the second barrier B2 are disposed on the first light emitting element L1, the second light emitting element 101a and the first barrier B1 at a side away from the substrate 10, that is, the second light emitting element 101a and the photosensitive element 101B are disposed on different layers, which is more favorable for eliminating the lateral infrared light/ultraviolet light generated by the second light emitting element 101a, so that the touch accuracy of the display panel 100 can be ensured.
Fig. 9 is a cross-sectional view of another CC' of the display panel provided in the embodiment of fig. 1. Optionally, referring to fig. 9, the first light-emitting element L1 and the first retaining wall B1 are disposed on the same layer on one side of the substrate 10 close to the light-emitting surface of the display panel 100, and the infrared component 101 and the photosensitive component 101B are disposed on the same layer on one side of the first light-emitting element L1 away from the substrate 10.
Specifically, the first light-emitting element L1 and the first retaining wall B1 are disposed on the same layer on one side of the substrate 10 close to the light-emitting surface of the display panel 100, and the infrared component 101 and the photosensitive component 101B are disposed on the same layer on one side of the first light-emitting element L1 and the first retaining wall B1 away from the substrate 10, that is, the first light-emitting element L1, and the photosensitive component 101B are disposed on different film layers. On one hand, the first light emitting element L1 and the second light emitting element 101a are disposed on different film layers, which can prevent the generation of infrared light/ultraviolet light by the excitation of visible light, especially blue light, thereby avoiding the generation of more noise light; on the other hand, the first light emitting element L1 and the photosensitive element 101b are located on different film layers, so that interference of visible light on the photosensitive element 101b can be reduced, and the touch accuracy of the display panel 100 can be better ensured.
Alternatively, the material of the first retaining wall B1 and the second retaining wall B2 includes a light absorbing material.
Specifically, the first retaining wall B1 and the second retaining wall B2 may be made of light absorbing materials, and the light absorbing materials have a transmittance of less than 5% for blue light, a transmittance of less than 3% for green light, and a transmittance of less than 8% for red light, so that noise light generated by the first light emitting element L1 and the second light emitting element 101a can be effectively absorbed.
Optionally, 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 photosensitive element 101b can be reduced or even eliminated, the touch precision and accuracy of the display panel are ensured, and the production cost can be saved.
Fig. 10 is a schematic structural diagram of a display device according to an embodiment of the present disclosure. As shown in fig. 9, the display device 200 provided in the present embodiment includes the display panel 100 provided in the above embodiment. The embodiment of fig. 10 is only an example of a mobile phone, and the display device 200 is described, it should be understood that the display device 200 provided in the embodiment of the present invention may be other display devices 200 with 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 panel provided in the embodiment of the present invention, and specific reference may be made to the specific description of the display panel 100 in the foregoing embodiments, and details of this embodiment are not repeated herein.
As can be seen from the above embodiments, the display panel, the manufacturing method of the display panel, and the display device provided by the present invention at least achieve the following beneficial effects:
the application provides a display panel and display device includes infrared subassembly, first light emitting component, first barricade and second barricade, and wherein, infrared subassembly includes second light emitting component and photosensitive element. Because at least part of the orthographic projection of the first retaining wall on the substrate is positioned between the orthographic projection of the first light-emitting element on the substrate and the orthographic projection of the photosensitive element on the substrate, and the photosensitive element and the first retaining wall are at least partially overlapped along the direction in which the first light-emitting element points to the photosensitive element, the first retaining wall can shield the visible light emitted by the first light-emitting element, and the visible light is prevented from interfering the photosensitive element; meanwhile, at least part of the orthographic projection of the second baffle wall on the substrate is positioned between the orthographic projection of the second light-emitting element on the substrate and the orthographic projection of the photosensitive element on the substrate, so that the lateral emergent light of the second light-emitting element can be shielded, and the accuracy of infrared touch control is further ensured
Although some specific embodiments of the present invention have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications can be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (11)
1. A display panel, comprising:
a substrate;
the display area comprises an infrared assembly and a first light-emitting element with at least one light-emitting color, the infrared assembly and the first light-emitting element are positioned on the same side of the substrate, and the infrared assembly comprises a second light-emitting element and a photosensitive element; the light emitting color of the first light emitting element is at least one of red, green or blue; the second light-emitting element is at least one of an infrared light-emitting element or an ultraviolet light-emitting element;
the display panel also comprises a first retaining wall and a second retaining wall; at least part of the orthographic projection of the first retaining wall on the substrate is positioned between the orthographic projection of the first light-emitting element on the substrate and the orthographic projection of the photosensitive element on the substrate, and at least part of the orthographic projection of the second retaining wall on the substrate is positioned between the orthographic projection of the second light-emitting element on the substrate and the orthographic projection of the photosensitive element on the substrate;
the photosensitive element is at least partially overlapped with the first retaining wall along the direction that the first light-emitting element points to the photosensitive element, and the photosensitive element is at least partially overlapped with the second retaining wall along the direction that the second light-emitting element points to the photosensitive element; along the direction perpendicular to the plane of the substrate, the height of the first retaining wall is greater than that of the second retaining wall;
and/or the first light-emitting element at least comprises a first sub light-emitting element and a second sub light-emitting element, and the wavelength of the light of the first sub light-emitting element is larger than that of the light of the second sub light-emitting element; the minimum distance from the first sub-light-emitting element to the second light-emitting element is D1, the minimum distance from the second sub-light-emitting element to the second light-emitting element is D2, and D1 is smaller than D2.
2. The display panel according to claim 1, wherein the first light emitting element is a Micro LED or a Mini LED, and the second light emitting element is a Micro LED or a Mini LED.
3. The display panel according to claim 1, wherein the first retaining wall has a height greater than that of the first light emitting element in a direction perpendicular to the plane of the substrate.
4. The display panel according to claim 3, wherein the height of the second retaining wall is less than or equal to the height of the second light emitting element along a direction perpendicular to the plane of the substrate.
5. The display panel according to claim 1, wherein the width of the first bank is d1 along the direction in which the first light-emitting device points to the photosensitive device, and the width of the second bank is d2 along the direction in which the second light-emitting device points to the photosensitive device, wherein d1> d2.
6. The display panel according to claim 1, wherein the display region comprises a plurality of pixel groups arranged in an array, each pixel group comprises n pixels, each pixel comprises the first light emitting element of at least one light emitting color, one infrared component is correspondingly arranged in one pixel group, and n is greater than or equal to 5 and less than or equal to 20.
7. The display panel according to claim 1, wherein the first dam, the second dam, the first light emitting element, and the infrared component are disposed on the same layer.
8. The display panel according to claim 1, wherein the first light emitting element, the second light emitting element and the first barrier are disposed on the same layer, and the photosensor and the second barrier are disposed on a side of the second light emitting element away from the substrate.
9. The display panel of claim 1, wherein the first light-emitting element and the first retaining wall are disposed on the same layer on a side of the substrate close to the light-emitting surface of the display panel, and the infrared element and the photosensitive element are disposed on the same layer on a side of the first light-emitting element away from the substrate.
10. The display panel according to claim 1, wherein the material of the first and second retaining walls comprises a light absorbing material.
11. A display device comprising the display panel according to any one of claims 1 to 10.
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| CN202011176775.6A CN112286387B (en) | 2020-10-29 | 2020-10-29 | Display panel and display device |
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| WO2017003160A1 (en) * | 2015-06-30 | 2017-01-05 | 엘지이노텍 주식회사 | Sensing device having cover substrate-integrated light receiving part |
| CN105808021B (en) * | 2016-03-09 | 2021-01-22 | 京东方科技集团股份有限公司 | Light-sensitive touch panel, display device and touch positioning method |
| CN105975136B (en) * | 2016-06-30 | 2019-03-26 | 京东方科技集团股份有限公司 | Display base plate and its manufacturing method and display device |
| CN106444997B (en) * | 2016-12-06 | 2023-10-27 | Oppo广东移动通信有限公司 | Sensor assembly, cover plate assembly and mobile terminal |
| CN206282255U (en) * | 2016-12-15 | 2017-06-27 | 广东欧珀移动通信有限公司 | Block piece, sensor cluster and mobile terminal |
| KR102643660B1 (en) * | 2017-02-14 | 2024-03-06 | 삼성전자주식회사 | electronic device including biometric sensor |
| CN108537090A (en) * | 2017-03-01 | 2018-09-14 | 上海箩箕技术有限公司 | Fingerprint imaging module and electronic equipment |
| CN109509767B (en) * | 2017-09-15 | 2024-07-12 | 京东方科技集团股份有限公司 | Display panel and display device |
| CN209560569U (en) * | 2019-02-14 | 2019-10-29 | 金佶科技股份有限公司 | Photosensitive module and image capturing device |
| CN109935599B (en) * | 2019-03-29 | 2021-10-26 | 上海天马微电子有限公司 | Display panel, display device and manufacturing method of display panel |
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