CN115581087A

CN115581087A - Display device, display panel and manufacturing method thereof

Info

Publication number: CN115581087A
Application number: CN202211167730.1A
Authority: CN
Inventors: 夏亮; 左凯龙; 孙阔
Original assignee: BOE Technology Group Co Ltd; Chengdu BOE Optoelectronics Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Chengdu BOE Optoelectronics Technology Co Ltd
Priority date: 2022-09-23
Filing date: 2022-09-23
Publication date: 2023-01-06

Abstract

The disclosure relates to a display device, a display panel and a manufacturing method thereof, and relates to the technical field of display. The display panel comprises a display substrate, a pyroelectric device and a heat collecting layer, wherein the display substrate is provided with a plurality of light emitting units; the pyroelectric device is arranged on one side of the display substrate, and one pyroelectric device and one light-emitting unit are at most partially overlapped; the heat-collecting layer is arranged on one side, far away from the display substrate, of the pyroelectric device and comprises a partition part and a plurality of heat-collecting units, the partition part is provided with a plurality of light-transmitting holes, and the heat-collecting units are filled in the light-transmitting holes in a one-to-one correspondence manner and are attached to the side walls of the light-transmitting holes; a heat collecting unit is overlapped with a pyroelectric device; the side wall of the light hole is expanded along the direction far away from the display substrate or is vertical to the display substrate; the heat collecting unit and the separating part at least can transmit infrared light, and the refractive index of the separating part to the infrared light is smaller than that of the heat collecting unit to the infrared light.

Description

Display device, display panel and manufacturing method thereof

Technical Field

The disclosure relates to the technical field of display, in particular to a display device, a display panel and a manufacturing method of the display panel.

Background

Display panels have become an indispensable component of electronic devices such as mobile phones and computers. In order to realize intelligent control of electronic equipment, for example, functions such as suspension gesture control and automatic screen-touching detection need to be realized, so that sensors for detecting parameters such as ambient temperature and ambient light need to be arranged, wherein the sensors for detecting the ambient temperature are widely applied, but if an independent sensor is specially installed, a complex installation structure needs to be designed, and the lightness and thinness are difficult to realize.

It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

The present disclosure is directed to overcome the above-mentioned deficiencies of the prior art, and to provide a display device, a display panel and a method for manufacturing the display panel, which can detect an ambient temperature by using the display panel and improve a detection sensitivity.

According to an aspect of the present disclosure, there is provided a display panel including:

a display substrate having a plurality of light emitting cells;

the pyroelectric devices are arranged on one side of the display substrate, and one pyroelectric device and one light-emitting unit are at most partially overlapped;

the heat-gathering layer is arranged on one side, far away from the display substrate, of the pyroelectric device and comprises a partition part and a plurality of heat-gathering units, the partition part is provided with a plurality of light holes, and the heat-gathering units are filled in the light holes in a one-to-one correspondence manner and are attached to the side walls of the light holes; a heat collecting unit is overlapped with the pyroelectric device; the side wall of the light hole is expanded along the direction far away from the display substrate or is vertical to the display substrate; the heat collecting unit and the separating part at least can transmit infrared light, and the refractive index of the separating part to the infrared light is smaller than that of the heat collecting unit to the infrared light.

In an exemplary embodiment of the present disclosure, the pyroelectric device includes a first sensing electrode, a pyroelectric sensing layer and a second sensing electrode sequentially stacked in a direction away from the display substrate; the second induction electrode is made of transparent conductive materials.

In an exemplary embodiment of the present disclosure, the display panel further includes:

the filling layer and the pyroelectric devices are arranged on the same side of the display substrate and separate the pyroelectric devices; the surface of the filling layer far away from the display substrate is flush with the surface of the second induction electrode far away from the display substrate;

the separating part is arranged on the surface of the filling layer far away from the display substrate.

In an exemplary embodiment of the present disclosure, the heat collecting unit is disposed at a surface of the second sensing electrode of the pyroelectric device overlapped therewith, which is far from the display substrate.

In an exemplary embodiment of the present disclosure, a material of the heat accumulating unit is different from a material of the second sensing electrode.

the filling layer and the pyroelectric devices are arranged on the same side of the display substrate and separate the pyroelectric devices; the surface of the filling layer far away from the display substrate is flush with the surface of the pyroelectric induction layer far away from the display substrate;

In an exemplary embodiment of the present disclosure, the heat collecting unit and the second sensing electrode of the pyroelectric device overlapped therewith are of an integrated structure.

In an exemplary embodiment of the present disclosure, the material of the partition and the filling layer is the same.

an encapsulation layer covering each of the light emitting cells;

the touch layer is arranged on the surface of the packaging layer, which is far away from the display substrate;

the pyroelectric device is arranged on the surface, far away from the display substrate, of the touch layer.

the filter layer is arranged on the surface of the heat accumulating layer far away from the display substrate and comprises a plurality of filter parts and limiting parts for separating the filter parts; the light filtering parts are overlapped with the light emitting units in a one-to-one correspondence manner; the limiting part is overlapped with the heat collecting unit and at least transmits infrared rays.

and the circular polarizing layer is arranged on the surface of the heat accumulating layer far away from the display substrate.

In an exemplary embodiment of the present disclosure, the display substrate includes:

driving the back plate;

the pixel definition layer and the light-emitting units are arranged on the same side of the driving back plate and separate the light-emitting units;

the orthographic projection of the pyroelectric device on the driving backboard is located within the orthographic projection of the pixel definition layer on the driving backboard.

According to an aspect of the present disclosure, there is provided a method of manufacturing a display panel, including:

forming a display substrate with a plurality of light-emitting units;

forming a plurality of first sensing electrodes on one side of the display substrate;

forming a filling layer with a plurality of filling holes on one side of the display substrate, where the first sensing electrodes are arranged, wherein the filling holes correspondingly expose the first sensing electrodes one to one;

sequentially stacking a pyroelectric induction layer and a second induction electrode in the filling hole;

forming a partition part with a light transmission hole on the surface of the filling layer far away from the display substrate; the light hole is exposed out of the second sensing electrode; the side wall of the light hole is expanded along the direction far away from the display substrate or is vertical to the display substrate;

forming a heat collecting unit which can at least transmit infrared light in the light transmission hole;

the light hole and the separating part can at least transmit infrared light, and the refractive index of the separating part to the infrared light is smaller than that of the heat collecting unit to the infrared light.

forming a display substrate with a plurality of light-emitting units;

filling a pyroelectric induction layer in the filling hole, wherein the surface of the pyroelectric induction layer far away from the display substrate is flush with the surface of the filling layer far away from the display substrate;

forming a partition part with a light transmission hole on the surface of the filling layer far away from the display substrate; the light holes correspondingly expose the pyroelectric induction layers one by one; the side wall of the light hole is expanded along the direction far away from the display substrate or is vertical to the display substrate;

a second induction electrode and a heat collecting unit which are of an integrated structure are formed in the light hole;

According to an aspect of the present disclosure, there is provided a display device including the display panel of any one of the above.

According to the display device, the display panel and the manufacturing method of the display panel, the pyroelectric device is integrated in the display panel, the light-emitting unit cannot be completely shielded, the ambient temperature is detected on the premise that image display is not damaged, and an electric signal is generated according to the temperature, so that the ambient temperature can be detected.

The heat gathering unit and the separating part of the heat gathering layer can penetrate through infrared light, but the refractive index of the heat gathering unit to the infrared light is larger than that of the separating part, so that at least part of the infrared light can be totally reflected on the joint interface of the heat gathering unit and the separating part, and the side wall of the light hole is perpendicular to the display substrate or expands towards the direction far away from the display substrate, so that the totally reflected infrared light can irradiate the pyroelectric device, the diffusion of the infrared light is reduced through the heat gathering unit, the receiving capacity of the pyroelectric device to the infrared light is improved, even under the condition that the ambient temperature and the temperature of the pyroelectric device are close to each other, an electric signal can still be generated, and the detection sensitivity is improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.

Fig. 1 is a schematic diagram of a display panel according to a first embodiment of the disclosure.

Fig. 2 is a schematic diagram of a display panel according to a second embodiment of the disclosure.

Fig. 3 is a schematic diagram of a display panel according to a third embodiment of the disclosure.

Fig. 4 is a schematic diagram of a fourth embodiment of a display panel according to the present disclosure.

Fig. 5 is a schematic diagram of a display panel according to a fifth embodiment of the disclosure.

FIG. 6 is a schematic diagram of a fill hole in one embodiment of a display panel according to the present disclosure.

Fig. 7 is a schematic view of a light hole in one embodiment of a display panel according to the present disclosure.

Fig. 8 is a schematic view of a light hole in another embodiment of a display panel according to the present disclosure.

FIG. 9 is a partial top view of a display substrate in an embodiment of a display panel according to the present disclosure.

FIG. 10 is a partial top view of a fill layer in an embodiment of a display panel according to the present disclosure.

FIG. 11 is a partial top view of a heat concentrating layer in one embodiment of a display panel of the present disclosure.

FIG. 12 is a partial top view of one embodiment of a display panel according to the present disclosure.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted. Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale.

The terms "a," "an," "the," "said," and "at least one" are used to indicate the presence of one or more elements/components/parts/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.; the terms "first," "second," and "third," etc. are used merely as labels, and are not limiting as to the number of their objects.

Herein, the "overlap" of the a-feature and the B-feature means that the orthographic projection of the a-feature on the display substrate and the orthographic projection of the B-feature on the display substrate at least partially coincide. Meanwhile, the orthographic projection on the display substrate may refer to an orthographic projection on the substrate.

The disclosed embodiment provides a display panel, which may include a display substrate PNL, a pyroelectric device PIS, and a heat accumulating layer THL, as shown in fig. 1 to 4, 7, and 12, wherein:

the display substrate PNL has a plurality of light emitting cells LD. The number of the pyroelectric devices PIS is multiple, the pyroelectric devices PIS are arranged on one side of the display substrate PNL, and one pyroelectric device PIS is at most partially overlapped with one light emitting unit.

The heat accumulating layer THL is arranged on one side, far away from the display substrate PNL, of the pyroelectric device PIS and comprises a separation part SP and a plurality of heat accumulating units TH, the separation part SP is provided with a plurality of light holes LH, and the heat accumulating units TH are filled in the light holes LH in a one-to-one correspondence manner and are attached to the side walls of the light holes LH; a heat collecting unit TH is overlapped with a pyroelectric device PIS; the side wall of the light hole LH is expanded along a direction away from the display substrate PNL or is perpendicular to the display substrate PNL; the heat accumulating unit TH and the separating portion SP each transmit at least infrared light, and the refractive index of the separating portion SP to infrared light is smaller than that of the heat accumulating unit TH to infrared light.

This disclosed display panel, through release the integrated inside display panel of electric device PIS with heat, and can not shelter from luminescence unit LD completely, under the prerequisite that does not destroy image display, detect ambient temperature, generate the signal of telecommunication according to the temperature to can detect ambient temperature.

The heat gathering unit TH and the separating part SP of the heat gathering layer THL can transmit infrared light, but the refractive index of the heat gathering unit TH to the infrared light is larger than that of the separating part SP, so that at least part of the infrared light can be totally reflected on the joint interface of the heat gathering unit TH and the separating part SP, and the side wall of the light transmission hole LH is perpendicular to the display substrate PNL or expands towards the direction far away from the display substrate PNL, so that the totally reflected infrared light can irradiate the pyroelectric device PIS, the diffusion of the infrared light is reduced through the heat gathering unit TH, the receiving capacity of the pyroelectric device PIS to the infrared light is improved, even under the condition that the ambient temperature and the temperature of the pyroelectric device PIS are close to each other, an electric signal can still be generated, and the detection sensitivity is improved.

The basic architecture of the display panel of the present disclosure is exemplified below

As shown in fig. 1 to 4, the display substrate PNL has a plurality of light emitting units LD, each of which can independently emit light to display an image. The display substrate PNL may be an organic electroluminescent display substrate, and the light emitting unit LD may be an OLED (organic light emitting diode), a Micro LED (Micro light emitting diode), a Mini LED (sub-millimeter light emitting diode), or a light emitting device such as a QLED (quantum dot diode). Of course, the display substrate PNL may be a liquid crystal display substrate.

The following description will be given taking the display substrate PNL as an organic electroluminescence display substrate as an example:

as shown in fig. 1 to 4, the display substrate PNL may include a driving backplane BP, the light emitting unit LD may be disposed on one side of the driving backplane BP, and the driving backplane BP has a driving circuit therein, and the light emitting unit LD may be driven to emit light to display an image, wherein:

the driving back plate BP may include a substrate and a circuit layer located on one side of the substrate, where the substrate may be a flat plate structure, and the substrate may be made of hard materials such as glass, and may also be made of soft materials such as polyimide.

The circuit layer may be disposed on one side of the substrate, and the circuit layer may include a driving circuit through which the light emitting cells LD may be driven to emit light. For example, the display panel may be divided into at least a display area AA and a peripheral area WA outside the display area AA, and accordingly, the driving circuit may include a pixel circuit located in the display area AA and a peripheral circuit located in the peripheral area WA, where the pixel circuit may be a pixel circuit such as 3T1C, 6T1C, 7T2C, etc., as long as it can drive the light emitting unit LD to emit light, and the structure thereof is not particularly limited. The number of pixel circuits may be the same as the number of light emitting units LD, and are connected to the respective light emitting units LD in one-to-one correspondence so as to control the respective light emitting units LD to emit light, respectively. Where nTmC denotes that one pixel circuit includes n transistors (denoted by the letter "T") and m capacitors (denoted by the letter "C"). Of course, the same pixel circuit may also be connected to a plurality of light emitting units LD to simultaneously drive the plurality of light emitting units LD to emit light, and is not particularly limited herein.

The peripheral circuit is connected to the pixel circuit, and is configured to input a driving signal to the pixel circuit to control the light emitting unit LD to emit light. The peripheral circuit may include a gate driving circuit and a light emission control circuit, and of course, may include other circuits, and the specific structure of the peripheral circuit is not particularly limited herein.

The circuit layer may include a plurality of thin film transistors and capacitors, where each thin film transistor may be a top gate or bottom gate thin film transistor, each thin film transistor may include an active layer and a gate electrode, and taking the top gate thin film transistor as an example, the circuit layer may include a semiconductor layer, a first gate insulating layer, a first gate layer, a second gate insulating layer, a second gate layer, an interlayer dielectric layer, a first source drain layer, a passivation layer, a first planarization layer, a second source drain layer, and a second planarization layer, which are sequentially stacked in a direction away from the substrate, and a specific pattern of each film layer is determined according to a specific configuration of the driving circuit, and is not particularly limited herein.

As shown in fig. 1 to fig. 4, the light emitting units LD are disposed on one side of the driving back plate BP, and the orthographic projection of each light emitting unit LD on the circuit layer may be located in the display area AA. Each of the light emitting units LD may include a first electrode ANO, a second electrode CAT, and a light emitting functional layer EL between the first electrode ANO and the second electrode CAT, which may be excited to emit light by applying an electrical signal to the first electrode ANO and the second electrode CAT.

As shown in fig. 1 to 4 and 9, in order to define the positions of the light emitting units LD and prevent crosstalk from occurring in the light emitted from the adjacent light emitting units LD, the light emitting units LD may be separated by a pixel defining layer PDL, specifically, the pixel defining layer PDL may be disposed on the same side of the driving backplane BP as the light emitting units LD, for example, on the surface of the second flat layer away from the substrate. The first electrodes ANO of the respective light emitting units LD are spaced apart, and the pixel defining layer PDL is provided with openings exposing the respective first electrodes ANO, i.e., one opening exposes one first electrode ANO. The pixel defining layer PDL may be configured to define a range of each light emitting unit LD, a range of one opening, that is, a range of one light emitting unit LD, and a boundary of an orthogonal projection of the light emitting unit LD on the driving backplane BP is a boundary of an orthogonal projection of the opening on the driving backplane BP.

The light emitting function layer EL is at least partially located in the opening and is stacked on the first electrode ANO. The light emitting function layer EL may include a hole injection layer, a hole transport layer, a light emitting material layer, an electron transport layer, and an electron injection layer, which are sequentially stacked in a direction away from the driving back plate BP. Of course, other structures may be adopted as long as they can emit light in cooperation with the first electrode ANO and the second electrode CAT.

The second electrode CAT may cover the light emitting functional layer EL, and the second electrode CAT may be a continuous whole layer structure, so that the respective light emitting units LD may share the same second electrode CAT. The second electrode CAT may be recessed into the opening at a position corresponding to the opening. Meanwhile, the second electrode CAT may be a cathode of the light emitting unit LD, which may adopt a light-transmitting structure, so that the light emitting unit LD may emit light in a direction away from the driving back plate BP, for example, the material of the second electrode CAT may adopt metal magnesium, silver or an alloy thereof, and the like, and may transmit light while being conductive at a certain thickness. Meanwhile, the first electrode ANO may be a non-light-transmissive structure, such that the light emitting unit LD is a top emission structure.

In some embodiments of the present disclosure, as shown in fig. 1 to 4, each light emitting unit LD may independently emit light, and the light emitting colors of different light emitting units LD may be different, specifically, at least the light emitting material layer in the light emitting functional layer EL may be divided into a plurality of light emitting portions disposed in the respective openings in a one-to-one correspondence, and other film layers of the light emitting functional layer EL may also be distributed in an array or disposed in a whole layer. The light-emitting functional layer EL corresponding to each light-emitting section can emit light independently, and the light-emitting colors of the different light-emitting units LD can be different, so that color display can be directly realized.

In some embodiments of the present disclosure, as shown in fig. 1 to 4, the light emitting function layer EL may also cover the pixel defining layer PDL and each first electrode ANO at the same time, i.e., each light emitting unit LD may share the same light emitting function layer EL, and at this time, the light emitting color of each light emitting unit LD is the same layer.

As shown in fig. 1 to 4, the display panel may further include an encapsulation layer TFE, which may cover each of the light emitting units LD, for protecting the light emitting layer OL and preventing the light emitting units LD from being corroded by external water and oxygen.

In some embodiments of the present disclosure, the encapsulation layer TFE may be in the form of a thin film encapsulation, which may include a first inorganic layer, an organic layer, and a second inorganic layer, wherein: the first inorganic layer may cover each light emitting unit LD. The organic layer may be disposed on the surface of the first inorganic layer away from the driving backplane BP, and the boundary of the organic layer may be limited to the inner side of the boundary of the first inorganic layer by the barrier dam located in the peripheral area WA, and the boundary of the orthographic projection of the organic layer on the driving backplane BP may be located in the peripheral area WA, ensuring that the organic layer can cover each light emitting unit LD. The second inorganic layer may cover the organic layer and the first inorganic layer not covered by the organic layer, may block water and oxygen intrusion through the second inorganic layer, and may achieve planarization through the organic layer having flexibility.

In some embodiments of the present disclosure, as shown in fig. 1 to 4, the display panel may further include a touch layer TPS, which may be disposed on a side of the display packaging layer TFE away from the driving backplane BP and is used for sensing a touch operation. Taking the touch layer TPS adopting a mutual capacitance type touch structure as an example, the touch layer TPS may include a plurality of first touch electrodes and a plurality of second touch electrodes, each of the first touch electrodes may be spaced apart along a row direction, and a first touch electrode may include a plurality of first electrode blocks spaced apart along a column direction and a via bridge connecting two adjacent first electrode blocks; each second touch electrode can be distributed at intervals along the column direction, and each second touch electrode comprises a plurality of second electrode blocks which are connected in series along the row direction; a transfer bridge is crossed with a second touch electrode and is arranged in an insulating mode. One of the first touch electrode and the second touch electrode can be used as a transmitting electrode, and the other one can be used as a receiving electrode, and both the first touch electrode and the second touch electrode are connected with a peripheral touch driving circuit.

The first electrode block and the second touch electrode are both positioned on the touch electrode layer, namely the first electrode block and the second touch electrode are arranged on the same layer, so that the first electrode block and the second touch electrode can be formed simultaneously through the same process. The transfer bridge may be located in the transfer layer, which may be located between the touch electrode layer and the encapsulation layer TFE. In addition, touch-control layer TPS may also include a buffer layer and an isolation layer, wherein:

the buffer layer can be disposed on the surface of the encapsulation layer TFE away from the driving backplane, and the interposer layer can be disposed on the surface of the buffer layer away from the driving backplane BP and includes a plurality of interposer bridges. The interposer layer may be made of metal or other conductive material. The isolation layer may cover the landing layer. The touch electrode layer TMB may be disposed on a surface of the isolation layer away from the driving backplane, and includes the first electrode block and the second touch electrode.

Certainly, the touch layer TPS can also adopt a self-contained touch structure as an example, and the touch layer TPS can include a touch electrode layer, the touch electrode layer can include a plurality of electrode blocks distributed in an array, each electrode block can be connected to a peripheral touch driving circuit through an independent trace, and a specific structure of the self-contained touch structure is not particularly limited as long as a touch function can be implemented.

In order to improve the light transmittance and reduce the shielding of the light emitting unit LD by the touch electrode layer, the touch electrode layer may be a mesh structure formed by connecting a plurality of channel lines, and the mesh structure has a plurality of meshes.

The touch layer TPS may further include a protective layer, which may cover the touch electrode layer, may protect the touch electrode layer through the protective layer, and may implement planarization so as to form a film layer above the touch layer TPS.

In order to reduce the reflection of ambient light, the following embodiments may be used:

as shown in fig. 1 and 3, in some embodiments of the present disclosure, the display panel further includes a circular polarizing layer POL, which may be disposed on a side of the touch layer TPS away from the display substrate PNL, for reducing ambient light from the outside reflected by the first electrode ANO and the second electrode CAT, and the circular polarizing layer POL may be a circular polarizer, and a specific structure thereof is not particularly limited herein.

As shown in fig. 2 and 4, in other embodiments of the present disclosure, different light emitting units LD may emit different lights. The display panel can also comprise a filter layer CFL which can be arranged on the surface of the touch layer TPS far away from the display substrate PNL and comprises a plurality of light filtering parts CF and a limiting part BM for separating the light filtering parts CF; the light-filtering portions CF are overlapped with the light-emitting units LD in a one-to-one correspondence, that is, the light-filtering portions CF are in a one-to-one correspondence with the openings of the pixel defining layer PDL, so that the light emitted from the light-emitting units LD can reach the corresponding light-filtering portions CF. The definition portion BM overlaps the pixel definition layer PDL. The light filter portion CF can transmit monochromatic light, so that part of ambient light and part of light reflected inside the display panel can be reduced, and the effect of reducing reflection is achieved. The color of the light-filtering part CF is the same as that of the corresponding light-emitting unit LD, so that the normal light emission of the display panel can be ensured. Therefore, the filter layer CFL can play a role in reducing reflection, a circular polarizer with larger thickness can be avoided, and the thickness of the display panel can be favorably reduced.

In other embodiments of the present disclosure, the light emitting functional layer EL has an integral layer structure, and the light emitting units LD emit light with the same color, and the display panel may further include the filter layer CFL, so that the color of light emitted by the filter portions CF may be defined, and thus, color display may be realized when the light emitting units LD emit light with the same color. At the same time, the filter layer CFL may still act to reduce reflections.

As shown in fig. 1 to 4, in some embodiments of the disclosure, the display panel may further include a cover plate CG, which may be made of a transparent material such as glass or acrylic, and which may be disposed on a side of the filter layer CFL away from the display substrate PNL or on a side of the circular polarization layer POL away from the display substrate PNL. For example, the cover plate CG may be attached to a surface of the filter layer CFL remote from the display substrate PNL, or the circular polarizing layer POL may be attached to a surface of the display substrate PNL remote from the display substrate PNL. The film layer covered by the cover plate CG can be protected.

The pyroelectric device PIS and the heat accumulating layer THL are explained in detail below based on the above architecture of the display panel:

as shown in fig. 1 to 4, 11 and 12, the pyroelectric device PIS is disposed at a side of the display substrate PNL, for example, the pyroelectric device PIS may be disposed at a surface of the touch layer TPS far from the display substrate PNL. Meanwhile, at most, a pyroelectric device PIS is partially overlapped with a light emitting unit LD, so that the pyroelectric device PIS is prevented from completely shielding the light emitting unit LD, and certainly, in order to prevent shielding to the greatest extent, the orthographic projection of the pyroelectric device PIS on the driving back plate BP can be positioned outside the opening of the pixel definition layer PDL and within the pixel definition layer PDL.

The pyroelectric device PIS can receive heat in the environment and generate corresponding electric signals, so that the detection of the environment temperature is realized, and the heat is mainly received by receiving infrared light in the environment.

As shown in fig. 1 to 4, in some embodiments of the present disclosure, the pyroelectric device PIS may include a first sensing electrode P1, a pyroelectric sensing layer PIL, and a second sensing electrode P2 sequentially stacked in a direction away from the display substrate PNL, wherein the pyroelectric sensing layer PIL includes a pyroelectric material, and when a temperature of the pyroelectric material changes, a spontaneous polarization changes, a change amount of a bound charge cannot be neutralized in time by a free charge on the surfaces of the first sensing electrode P1 and the second sensing electrode P2, and an electric charge that is not neutralized in time exists on the surface of the pyroelectric sensing layer PIL in a short time, so that a voltage change is generated, and a change of a voltage signal is collected by the first sensing electrode P1 and the second sensing electrode P2, thereby obtaining a telecommunication that can reflect the temperature. The operation principle of the pyroelectric device PIS is not described in detail herein.

The first sensing electrode P1 and the second sensing electrode P2 may be made of a transparent conductive material, such as Indium Tin Oxide (ITO).

Because the pyroelectric device PIS is not a whole layer structure, in order to set other structures above the pyroelectric device PIS and avoid the suspension of the upper layer structure, the display panel may further include a filling layer FL, and the filling layer FL and the pyroelectric device PIS may be disposed at the same side of the display substrate PNL, for example, both are disposed on the surface of the touch layer TPS away from the display substrate PNL. Meanwhile, the filling layer FL may fill a space between the pyroelectric devices PIS and separate the pyroelectric devices PIS. The material of the fill layer FL may be the same as the pixel defining layer, but of course, may be different.

As shown in fig. 1, 2, 7 and 10, in some embodiments of the present disclosure, a surface of the filling layer FL far from the display substrate PNL may be flush with a surface of the second sensing electrode P2 far from the display substrate PNL, that is, a thickness of the filling layer FL may be the same as a thickness of the pyroelectric device PIS, that is, the filling layer FL does not cover a surface of the pyroelectric device PIS far from the display substrate PNL, that is, the filling layer FL is provided with a plurality of filling holes FH, and each of the filling holes FH is provided with one pyroelectric device PIS.

As shown in fig. 3, 4, 8 and 10, in some embodiments of the present disclosure, a surface of the filling layer FL away from the display substrate PNL may be flush with a surface of the pyroelectric induction layer PIL away from the display substrate PNL. That is, the filling layer FL is provided with a plurality of filling holes FH, and each filling hole FH is provided with a pyroelectric device PIS therein, but the thickness of the filling layer FL is equal to the total thickness of the pyroelectric sensing layer PIL and the first sensing electrode P1, and the second sensing electrode P2 may be located outside the filling holes FH.

As shown in fig. 12, the filling holes FH have the same boundary as the edges of the pyroelectric devices PIS but are offset from the light emitting units LD to avoid blocking the light emitting units LD, for example, the light emitting units LD and the pyroelectric devices PIS are distributed in an orthographic projection array on the display substrate PNL, and one row of the light emitting units LD may be positioned in the same row as one row of the pyroelectric devices PIS and alternately distributed along the row direction.

As shown in fig. 5, in some embodiments of the present disclosure, the filling layer FL may cover the pyroelectric devices PIS and fill the spaces between the pyroelectric devices PIS.

At least one of the first sensing electrode P1 and the second sensing electrode P2 of each pyroelectric device PIS is a plurality of independent units distributed in an array, and the other one of the first sensing electrode P1 and the second sensing electrode P2 can be distributed in an array or in a whole layer structure. For example: the first sensing electrodes P1 of each pyroelectric device PIS are distributed in an array, and the second sensing electrodes P2 are in an integral layer structure, so that each pyroelectric device PIS shares the second sensing electrodes P2. Of course, the first sensing electrode P1 and the second sensing electrode P2 may both adopt an array distribution form.

As shown in fig. 1 to 4, 7, 11, and 12, the heat accumulating layer THL is provided on a side of the pyroelectric device PIS away from the display substrate PNL. The heat accumulating layer THL may include a partition SP provided with a plurality of light transmission holes LH overlapping a light emitting unit LD, i.e., one light transmission hole LH disposed in one-to-one correspondence with an opening of the pixel defining layer PDL, and a plurality of heat accumulating units TH.

The heat collecting units TH are filled in the light holes LH in a one-to-one correspondence manner and are attached to the side walls of the light holes LH; a heat collecting unit TH is overlapped with a pyroelectric device PIS, namely the orthographic projection of the heat collecting unit TH on the display substrate PNL is at least partially overlapped with the orthographic projection of the pyroelectric device PIS on the display substrate PNL. Meanwhile, the sidewalls of the light-transmitting holes LH may be expanded in a direction away from the display substrate PNL, for example, a cross-section of the sidewalls of the light-transmitting holes LH in a direction perpendicular to the display substrate PNL may have an inverted trapezoid shape expanded in a direction away from the display substrate PNL. Alternatively, the sidewalls of the light transmission holes LH may also be perpendicular to the display substrate PNL. As long as the side wall of the light-transmitting hole LH does not contract in a direction away from the display substrate PNL.

Gather hot cell TH and separator SP and can both see through the infrared light, and separator SP is less than the refractive index of gathering hot cell TH to the infrared light to the refractive index of infrared light, make at least some infrared light can be at the interface of gathering hot cell TH and separator SP contact, the lateral wall of light trap LH, take place the total reflection, and infrared light after the total reflection shines to pyroelectric device PIS, the temperature that makes pyroelectric device PIS sense increases, correspondingly, increase its electric signal of output, thereby under the lower and unchangeable condition of ambient temperature, still can realize the detection to the temperature.

Of course, the heat collecting unit TH and the separating portion SP may transmit not only infrared light but also visible light or other light at the same time of transmitting infrared light.

The above-mentioned filter layer CFL and the circular polarizing layer POL may be disposed on a surface of the heat accumulating layer THL away from the display substrate PNL.

The material of the heat collecting unit TH and the separating portion SP may be an insulating material, or may be a conductive material such as a metal, as long as it can transmit infrared light and achieve the total reflection of infrared light described above, and the material thereof is not particularly limited. If the material of the heat collecting unit TH is a conductive material, the same material as the second sensing electrode P2 of the pyroelectric device PIS may be used, so that the two may be integrally formed, for example, the second sensing electrode P2 and the heat collecting unit TH may both be made of a transparent conductive material such as indium tin oxide, and the two may be integrally formed, so that the second sensing electrode P2 and the heat collecting unit TH are mutually reused.

The display panel of the present disclosure is explained below by way of a plurality of embodiments:

as shown in fig. 1, in the first embodiment of the present disclosure, a surface of the filling layer FL away from the display substrate PNL is flush with a surface of the second sensing electrode P2 of the pyroelectric device PIS away from the display substrate PNL. The material of the fill layer FL may be the same as that of the pixel defining layer PDL. The thickness of the filling layer FL is the same as that of the pyroelectric device PIS.

The pyroelectric device PIS is arranged on the surface, away from the display substrate PNL, of the touch layer TPS, and the first induction electrodes P1 and the second induction electrodes P2 are distributed in an array mode. The heat collecting unit TH is made of a material different from that of the second sensing electrode P2 of the pyroelectric device PIS, and the heat collecting unit TH is arranged on the surface of the second sensing electrode P2 far away from the display substrate PNL; the separator SP is provided on the surface of the filler layer FL away from the display substrate PNL. The thickness of the partition SP and the heat accumulating unit TH may be the same.

In this embodiment, the circular polarizing layer POL may be provided instead of the filter layer CFL, and the circular polarizing layer POL may be provided on the surface of the heat accumulating layer THL away from the display substrate PNL.

The cover plate CG is attached to the surface of the circular polarizing layer POL remote from the display substrate PNL.

As shown in fig. 2, in the second embodiment of the present disclosure, a surface of the filling layer FL distant from the display substrate PNL is flush with a surface of the second sensing electrode P2 of the pyroelectric device PIS distant from the display substrate PNL. The material of the filling layer FL may be the same as that of the pixel defining layer PDL. The thickness of the filling layer FL is the same as that of the pyroelectric device PIS.

The pyroelectric device PIS is arranged on the surface, far away from the display substrate PNL, of the touch layer TPS, and the first sensing electrodes P1 and the second sensing electrodes P2 are distributed in an array mode. The heat collecting unit TH is made of a material different from that of the second induction electrode P2 of the pyroelectric device PIS, and is arranged on the surface, far away from the display substrate PNL, of the second induction electrode P2; the separator SP is provided on the surface of the filler layer FL away from the display substrate PNL. The thickness of the partition SP and the heat accumulating unit TH may be the same.

In this embodiment, the circular polarizing layer POL may not be provided, but a filter layer CFL may be provided, the filter layer CFL may be provided on the surface of the heat accumulating layer THL away from the display substrate PNL, and a filter portion CF may overlap with a heat accumulating unit TH, and the limiting portion BM may overlap with the separating portion SP.

As shown in fig. 3, in the third embodiment of the present disclosure, a surface of the filling layer FL away from the display substrate PNL is flush with a surface of the pyroelectric induction layer PIL of the pyroelectric device PIS away from the display substrate PNL. The first sensing electrodes P1 and the second sensing electrodes P2 are distributed in an array. The material of the fill layer FL may be the same as that of the pixel defining layer PDL. The thickness of the filling layer FL is smaller than that of the pyroelectric device PIS, for example, the thickness of the filling layer FL is equal to the sum of the thicknesses of the first sensing electrode P1 and the pyroelectric sensing layer PIL.

The pyroelectric device PIS is arranged on the surface, far away from the display substrate PNL, of the touch layer TPS, the heat collecting unit TH and the second induction electrode P2 of the pyroelectric device PIS are made of the same materials and are integrally formed, and the heat collecting unit TH and the second induction electrode P2 can be made of transparent conductive materials such as indium tin oxide. The separator SP is provided on the surface of the filler layer FL away from the display substrate PNL. The thickness of the partition SP and the heat collecting unit TH may be the same, and correspondingly, the thickness of the partition SP and the thickness of the second sensing electrode P2 may be the same.

As shown in fig. 4, in the fourth embodiment of the present disclosure, the surface of the filling layer FL away from the display substrate PNL is flush with the surface of the pyroelectric induction layer PIL of the pyroelectric device PIS away from the display substrate PNL. The material of the filling layer FL may be the same as that of the pixel defining layer PDL. The thickness of the filling layer FL is smaller than that of the pyroelectric device PIS.

The pyroelectric device PIS is arranged on the surface, far away from the display substrate PNL, of the touch layer TPS, and the first sensing electrodes P1 and the second sensing electrodes P2 are distributed in an array mode. The heat collecting unit TH and the second sensing electrode P2 of the pyroelectric device PIS are made of the same material and are integrally formed, and both can be made of transparent conductive materials such as indium tin oxide and the like. The partition portion SP is provided on the surface of the filling layer FL away from the display substrate PNL. The thickness of the partition SP and the heat accumulating unit TH may be the same, and accordingly, may be the same as the thickness of the second sensing electrode P2.

The cover plate CG is attached to the surface of the circular polarization layer POL away from the display substrate PNL.

As shown in fig. 5, in the fifth embodiment of the present disclosure, the filling layer FL covers the second sensing electrode P2 of each pyroelectric device PIS, fills the space other than the pyroelectric device PIS, and achieves planarization. The material of the filling layer FL may be the same as that of the pixel defining layer PDL. The thickness of the filling layer FL is larger than that of the pyroelectric device PIS.

The pyroelectric device PIS is arranged on the surface, far away from the display substrate PNL, of the touch layer TPS, and the first sensing electrodes P1 and the second sensing electrodes P2 are distributed in an array mode. The heat collecting unit TH and the second sensing electrode P2 of the pyroelectric device PIS may be made of the same material or different materials, and both the heat collecting unit TH and the separating portion SP are disposed on the surface of the filling layer FL away from the display substrate PNL. The thickness of the partition SP and the heat accumulating unit TH may be the same.

In this embodiment, a circular polarization layer POL or a filter layer CFL may be provided to reduce the reflection of the ambient light, and reference may be made to the above embodiments, and details thereof are not described here.

It should be noted that although the above embodiments alternatively adopt the circularly polarizing layer POL and the filter layer CFL, these embodiments are only exemplary, and do not indicate that there is a contradiction in principle between the circularly polarizing layer POL and the filter layer CFL. It will be appreciated by those skilled in the art that the circularly polarizing layer POL and the filter layer CFL may be present in the same display panel at the same time.

The above description is only directed to the case where the display substrate employs a self-luminous light emitting unit such as an organic light emitting diode, and for the liquid crystal display substrate, a pyroelectric device and a heat collecting layer may also be employed, for example, the display substrate includes a backlight source, and an array substrate, a liquid crystal layer and a color film layer stacked in sequence, the color film layer has a plurality of filter portions, and the backlight source may be of a side-in type structure or a direct-type structure, and is not limited specifically herein. The pyroelectric device can be arranged on one side of the color film layer away from the array substrate, the heat collecting layer is arranged on one side of the pyroelectric device away from the array substrate, and the structure and the relation of the pyroelectric device and the heat collecting layer can be referred to the above embodiment mode and are not detailed here.

The display panel of the present disclosure may further include an induction processing circuit, which may be connected to each of the pyroelectric devices, for determining a temperature detected by each of the pyroelectric devices from an electrical signal generated by the pyroelectric device. Because the heat-collecting layer collects partial infrared light through total reflection, the temperature of the pyroelectric device is improved, and the sensitivity is improved.

In order to reduce errors caused by temperature rise due to the convergence of infrared light, the temperatures detected by the heat accumulating layer and the pyroelectric device can be compared with the ambient temperature in advance, and a compensation value or a compensation relation can be determined according to the difference between the temperatures. When the display panel works, the actual environment temperature can be calculated according to the compensation value and the compensation relation and the detected temperature value, so that the accuracy of the detection result is improved.

The sensing processing circuit may be located in the peripheral region, and may be a dedicated chip, or may be integrated with a chip for driving touch and display, which is not limited herein.

Based on some embodiments herein, the present disclosure provides a method for manufacturing a display panel, where the structure of the display panel may be the above embodiment in which the surface of the first, second, or other filling layer FL away from the display substrate PNL is flush with the surface of the second sensing electrode P2 away from the display substrate PNL, and the specific structure thereof is not described in detail herein. The manufacturing method may include steps S110 to S160, wherein:

step S110, a display substrate having a plurality of light emitting units is formed.

Step S120, forming a plurality of first sensing electrodes on one side of the display substrate.

Step S130, forming a filling layer having a plurality of filling holes on one side of the display substrate where the first sensing electrodes are disposed, where the filling holes expose the first sensing electrodes in a one-to-one correspondence.

Step S140, sequentially stacking a pyroelectric induction layer and a second induction electrode in the filling hole.

Step S150, forming a separating part with a light hole on the surface of the filling layer far away from the display substrate; the light hole is exposed out of the second sensing electrode; the side wall of the light hole is expanded along the direction far away from the display substrate or is vertical to the display substrate.

Step S160, forming a heat collecting unit in the light-transmitting hole, wherein the heat collecting unit is at least capable of transmitting infrared light.

The structure of the display substrate PNL can refer to the display substrate PNL, and the process is not limited herein.

As shown in fig. 6 and 7, the pyroelectric device PIS may be formed in multiple steps, that is, the first sensing electrode P1 is formed, the first sensing electrode P1 is covered by the filling layer FL, the filling layer FL is patterned, a filling hole FH exposing the first sensing electrode P1 is obtained, the pyroelectric sensing layer PIL and the second sensing electrode P2 are sequentially stacked in the filling hole FH, the position of the pyroelectric device PIS is limited by the filling layer FL, and the first sensing electrode P1 and the second sensing electrode P2 are uniformly distributed in an array.

Based on some embodiments herein, the present disclosure provides a method for manufacturing a display panel, where the structure of the display panel may be that the third, fourth, or other filling layer FL is flush with the surface of the pyroelectric sensing layer PIL away from the display substrate PNL, and the specific structure of the display panel is not described in detail herein. The manufacturing method may include steps S110 to S160, wherein:

s110, forming a display substrate with a plurality of light-emitting units;

s120, forming a plurality of first sensing electrodes on one side of the display substrate;

s130, forming a filling layer having a plurality of filling holes on one side of the display substrate where the first sensing electrodes are disposed, where the filling holes expose the first sensing electrodes in a one-to-one correspondence;

s140, filling a pyroelectric induction layer in the filling hole, wherein the surface of the pyroelectric induction layer, which is far away from the display substrate, is flush with the surface of the filling layer, which is far away from the display substrate;

s150, forming a separating part with a light hole on the surface of the filling layer far away from the display substrate; the light holes correspondingly expose the pyroelectric induction layers one by one; the side wall of the light hole is expanded along the direction far away from the display substrate or is vertical to the display substrate;

s160, forming a second induction electrode and a heat collecting unit which are of an integrated structure in the light hole;

As shown in fig. 6 and 8, the pyroelectric device PIS may be formed in a plurality of steps, that is, the first sensing electrode P1 is formed, the first sensing electrode P1 is covered with the filling layer FL, the filling layer FL is patterned to obtain the filling hole FH exposing the first sensing electrode P1, the pyroelectric sensing layer PIL is formed in the filling hole FH, and the position of the pyroelectric device PIS is defined by the filling layer FL. Then, a partition SP having a light hole LH is formed, and then the second sensing electrode P2 and the heat accumulating unit TH are formed in the light hole LH and are integrated at the same time, and the shapes of the second sensing electrode P2 and the heat accumulating unit TH can be limited by the sidewall of the light hole LH, and at this time, the first sensing electrode P1 and the second sensing electrode P2 are distributed in an array.

It should be noted that although the various steps of the manufacturing method of the present disclosure are depicted in the drawings in a particular order, this does not require or imply that all of the steps must be performed in that particular order to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step execution, and/or one step broken down into multiple step executions, etc.

The present disclosure also provides a display device, which may include the display panel of any of the above embodiments. The display panel is the display panel of any of the above embodiments, and the specific structure and beneficial effects thereof can refer to the above embodiments of the display panel, which are not described herein again. The display device disclosed by the present disclosure may be an electronic device with a display function, such as a mobile phone, a tablet computer, a television, etc., which are not listed here.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice in the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims

1. A display panel, comprising:

a display substrate having a plurality of light emitting cells;

the heat-collecting layer is arranged on one side, far away from the display substrate, of the pyroelectric device and comprises a partition part and a plurality of heat-collecting units, the partition part is provided with a plurality of light-transmitting holes, and the heat-collecting units are filled in the light-transmitting holes in a one-to-one correspondence manner and are attached to the side walls of the light-transmitting holes; a heat collecting unit is overlapped with the pyroelectric device; the side wall of the light hole is expanded along the direction far away from the display substrate or is vertical to the display substrate; the heat collecting unit and the separating part at least can transmit infrared light, and the refractive index of the separating part to the infrared light is smaller than that of the heat collecting unit to the infrared light.

2. The display panel according to claim 1, wherein the pyroelectric device comprises a first sensing electrode, a pyroelectric sensing layer and a second sensing electrode stacked in this order in a direction away from the display substrate; the second induction electrode is made of transparent conductive materials.

3. The display panel according to claim 2, characterized in that the display panel further comprises:

the filling layer and the pyroelectric devices are arranged on the same side of the display substrate and separate the pyroelectric devices; the surface of the filling layer, which is far away from the display substrate, is flush with the surface of the second induction electrode, which is far away from the display substrate;

4. The display panel according to claim 3, wherein the heat collecting unit is disposed on a surface of the second sensing electrode of the pyroelectric device overlapped therewith, which is far away from the display substrate.

5. The display panel according to claim 4, wherein a material of the heat accumulating unit is different from a material of the second sensing electrode.

6. The display panel according to claim 2, characterized in that the display panel further comprises:

7. The display panel of claim 6, wherein the heat collecting unit and the second sensing electrode of the pyroelectric device overlapped therewith are of an integrated structure.

8. The display panel according to claim 6, wherein the material of the partition and the filling layer is the same.

9. The display panel according to any one of claims 1 to 8, characterized by further comprising:

an encapsulation layer covering each of the light emitting cells;

the touch layer is arranged on the surface, far away from the display substrate, of the packaging layer;

10. The display panel according to any one of claims 1 to 8, characterized by further comprising:

the filter layer is arranged on the surface of the heat-accumulating layer far away from the display substrate and comprises a plurality of filter parts and limiting parts for separating the filter parts; the light filtering parts are overlapped with the light emitting units in a one-to-one correspondence manner; the limiting part is overlapped with the heat collecting unit and at least transmits infrared rays.

11. The display panel according to any one of claims 1 to 8, characterized by further comprising:

12. The display panel according to any one of claims 1 to 8, wherein the display substrate comprises:

driving the back plate;

the orthographic projection of the pyroelectric device on the driving back plate is positioned within the orthographic projection of the pixel definition layer on the driving back plate.

13. A method of manufacturing a display panel, comprising:

forming a display substrate with a plurality of light-emitting units;

the light-transmitting hole and the separating part at least can transmit infrared light, and the refractive index of the separating part to the infrared light is smaller than that of the heat collecting unit to the infrared light.

14. A method of manufacturing a display panel, comprising:

forming a display substrate with a plurality of light-emitting units;

forming a second induction electrode and a heat collecting unit which are of an integrated structure in the light hole;

15. A display device characterized by comprising the display panel according to any one of claims 1 to 12.