CN115061306B - Display panel and display device - Google Patents
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- CN115061306B CN115061306B CN202210795200.5A CN202210795200A CN115061306B CN 115061306 B CN115061306 B CN 115061306B CN 202210795200 A CN202210795200 A CN 202210795200A CN 115061306 B CN115061306 B CN 115061306B
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
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Abstract
The embodiment of the application provides a display panel and a display device. The display panel comprises a display area, a peripheral area positioned at the periphery of the display area, an IC area and a GOA area, a light source, a first optical waveguide and a first light receiver. At least a portion of the first light wave is disposed in the IC region and/or the GOA region, both ends of the first light waveguide are in conduction with the light source, and the first light waveguide is configured to enable light rays emitted by the light source to propagate through the first light waveguide. The first optical receiver is in communication with the first optical waveguide and is configured to receive light propagating in the first optical waveguide. The display panel provided by the embodiment of the application can detect the temperature of the IC area or the GOA area of the display panel in real time, and avoid the problems of reduced service life, reduced display quality and the like of the display panel caused by overhigh temperature of the IC area or the GOA area.
Description
Technical Field
The present application relates to the field of display technologies, and in particular, to a display panel and a display device.
Background
In the working process of the liquid crystal display panel, the peripheral area of the TFT substrate, particularly the IC area and the GOA area, can continuously generate heat, and if the peripheral area is at a higher temperature for a long time, the service life and the display quality of a display screen can be influenced, and meanwhile, related defects such as abnormal picture display, black screen and the like can be caused. How to improve the display effect and the service life of the display panel is a problem to be considered at present.
Disclosure of Invention
The embodiment of the application aims to provide a display panel and a display device, so as to improve the display effect of the display panel and prolong the service life of the display panel. The specific technical scheme is as follows:
an embodiment of a first aspect of the present application provides a display panel. The display panel comprises a display area, a peripheral area positioned at the periphery of the display area, an IC area and a GOA area, a light source, a first optical waveguide and a first light receiver. At least a portion of the first optical waveguide is disposed in the IC region and/or the GOA region, both ends of the first optical waveguide are in conduction with the light source, and the first optical waveguide is configured to propagate light emitted from the light source through the first optical waveguide. The first optical receiver is in communication with the first optical waveguide and is configured to first receive light propagating in the optical waveguide.
According to the display panel in the embodiment of the application, the first optical waveguide is arranged at least in the IC area or the GOA area of the display panel, and the first optical waveguide is conducted with the light source, so that the light emitted by the light source can be transmitted in the first optical waveguide, and the first light receiver is used for receiving the light transmitted in the first optical waveguide. When the temperature of a certain point near the first optical waveguide in the display panel changes, the optical paths of the two beams of light can change due to the thermal expansion effect and the thermal light effect, the interference extremum of the two beams of light can deviate, the specific temperature value can be demodulated by measuring the extremum deviation of the light received by the first optical receiver, and the specific values of the two optical paths can be demodulated by utilizing the deviation of the interference suboptimal value, so that the specific position of the corresponding temperature change in the IC area or the GOA area of the display panel can be obtained. Therefore, the temperature of the IC area or the GOA area of the display panel can be detected in real time, and the problems of reduced service life, reduced display quality and the like of the display panel caused by overhigh temperature of the IC area or the GOA area of the display panel are avoided.
In addition, the display panel according to the embodiment of the application may further have the following additional technical features:
in some embodiments of the application, the first optical waveguide comprises a top layer, a bottom layer, and a transmission layer sandwiched between the bottom layer and the top layer, the bottom layer and the top layer having a refractive index greater than that of the transmission layer, the light emitted by the light source being configured to propagate in the transmission layer.
In some embodiments of the application, the top layer is formed with a grating structure that is in the shape of an asperity.
In some embodiments of the present application, the top layer is made of silicon nitride, and the bottom layer is made of silicon nitride or silicon oxide.
In some embodiments of the present application, the material of the transmission layer is indium tin oxide.
In some embodiments of the present application, the display panel further includes a substrate, a plurality of gate lines and a plurality of data lines disposed on one side of the substrate, the plurality of gate lines and the plurality of data lines are disposed in a crisscross manner, two adjacent gate lines and two adjacent data lines together define a sub-pixel region, the display panel further includes a thin film transistor disposed in each sub-pixel region, the thin film transistor is connected to the corresponding gate line and data line, a second optical waveguide is disposed on a side of the gate line and the data line away from the substrate, and the display panel further includes a second optical receiver, the second optical receiver being electrically connected to the second optical waveguide.
In some embodiments of the application, the projection of the second optical waveguide onto the substrate is located within the projection of the gate line or the data line onto the substrate.
In some embodiments of the application, the light source is a fiber optic light source.
In some embodiments of the application, the first optical receiver is a photoelectric converter and/or the second optical receiver is a photoelectric converter.
In some embodiments of the present application, the display panel further includes a timing control chip electrically connected to the light source, and/or the timing control chip is electrically connected to the first light receiver or the second light receiver.
In some embodiments of the application, the timing control chip further comprises an alarm.
An embodiment of a second aspect of the present application provides a display device, including the display panel in any one of the embodiments of the first aspect.
According to the display device of the embodiment of the present application, since the display device is provided with the display panel of any embodiment of the first aspect, the display device also has the advantages of any embodiment of the first aspect, and the description thereof is omitted herein.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the application, and other embodiments may be obtained according to these drawings to those skilled in the art.
FIG. 1 is a schematic diagram of a display panel according to an embodiment of the present application (a first optical waveguide is disposed in a GOA region);
FIG. 2 is a schematic diagram of a first optical waveguide according to an embodiment of the present application;
FIG. 3 is a schematic diagram illustrating light transmission in a first optical waveguide according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a display panel according to an embodiment of the present application (the second optical waveguide is disposed in the pixel area);
FIG. 5 is a schematic flow chart of the first optical waveguide of the display panel according to the embodiment of the application;
fig. 6 is a schematic flow chart of the second optical waveguide of the display panel in the embodiment of the application.
The reference numerals are as follows:
10-a display panel; 11-GOA region;
100-light source; 200-a first optical waveguide; 210-bottom layer; 220-a transport layer; 230-top layer; 231-grating structure; 300-a second optical receiver; 410-a thin film transistor; 420-data lines; 430-gate line; 500-a second optical waveguide; 510-a lateral optical waveguide; 520-longitudinal optical waveguide; 600-a second optical receiver;
m-incident light; n-optical transmission routes.
Detailed Description
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the related art, the drawings that are required to be used in the embodiments or the related technical descriptions will be briefly described, and it is apparent that the drawings in the following description are only some embodiments of the present application and other embodiments may be obtained according to the drawings for those skilled in the art.
For ease of description, spatially relative terms, such as "inner," "outer," "lower," "below," "upper," "above," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. Based on the embodiments of the present application, all other embodiments obtained by the person skilled in the art based on the present application are included in the scope of protection of the present application.
In the working process of the liquid crystal display panel, the peripheral area of the TFT substrate, particularly the IC area and the GOA area, can continuously generate heat, and if the peripheral area is at a higher temperature for a long time, the service life and the display quality of a display screen can be influenced, and meanwhile, related defects such as abnormal picture display, black screen and the like can be caused. How to improve the display effect and the service life of the display panel is a problem to be considered at present.
As shown in fig. 1, an embodiment of the first aspect of the present application proposes a display panel 10. The display panel 10 includes a display region and a peripheral region located at the periphery of the display region, the peripheral region including an IC region and a GOA region 11, and the display panel 10 further includes a light source 100, a first optical waveguide 200, and a first light receiver 300. At least a portion of the first optical waveguide 200 is disposed in the IC region and/or the GOA region 11, both ends of the first optical waveguide 200 are in conduction with the light source 100, and the first optical waveguide 200 is configured such that light emitted from the light source 100 propagates through the first optical waveguide 200. The first light receiver 300 is in communication with the first light guide 200, the first light receiver 300 being configured to receive light propagating in the first light guide 200.
For clarity of explanation of the beneficial effects of the present application, the following working principle of the first optical waveguide 200 will be briefly described herein:
as shown in fig. 1, light emitted from the light source 100 enters the first optical waveguide 200 from both ends of the first optical waveguide 200, and can be transmitted in the first optical waveguide 200, and two beams of light transmitted in the first optical waveguide 200 interfere due to a certain optical path difference, so that an interference extremum exists. If the temperature is increased, the optical path length of the two beams of light changes due to the thermal expansion effect and the thermo-optic effect:
ΔL＝L(σ_T+α_T)T
in the above formula, L is the original cavity length, deltaL is the offset, sigma_T is the material thermo-optic coefficient, alpha_T is the material thermal expansion coefficient, and T is the temperature.
When the temperature at a certain point changes, the interference extremum of two beams of light can shift, and the temperature specific value can be demodulated through the extremum shift. And the specific values of the two optical paths can be demodulated by utilizing the offset of the interference secondary large value to obtain the specific position of the corresponding temperature change.
According to the display panel 10 of the embodiment of the present application, the first optical waveguide 200 is disposed at least in the IC area and/or the GOA area 11 of the display panel 10, and the first optical waveguide 200 is electrically connected to the light source 100, so that the light emitted by the light source 100 can be transmitted in the first optical waveguide 200, and the first light receiver 300 is used for receiving the light transmitted in the first optical waveguide 200. When the temperature of a certain point near the first optical waveguide 200 in the display panel 10 changes, the optical paths of the two beams of light change due to the thermal expansion effect and the thermo-optical effect, the interference extremum of the two beams of light shifts, the specific temperature value can be demodulated by measuring the extremum shift of the light received by the first optical receiver 300, and the specific values of the two optical paths can be demodulated by using the shift of the next-to-interference value, so as to obtain the specific position of the corresponding temperature change in the IC area or the GOA area 11 of the display panel 10. In this way, the temperature of the IC area or the GOA area 11 of the display panel 10 can be detected in real time, so as to avoid the problems of reduced service life and reduced display quality of the display panel 10 caused by too high temperature of the IC area or the GOA area 11 of the display panel 10.
In some specific embodiments of the present application, the peripheral region includes an IC region and a GOA region 11, the first optical waveguide 200 passing through the IC region, and/or the first optical waveguide 200 passing through the GOA region 11. In the related art TFT-LCD, each pixel is usually provided with a thin film transistor, and the thin film transistor of each pixel needs to be connected to a corresponding gate driving circuit to control the change of the transmittance of the liquid crystal in the pixel, and thus the change of the color of the pixel. GOA (Gate Driver on Array, array substrate row driving) circuit technology is a gate driving circuit technology commonly used in TFT-LCD (Thin Film Transistor Liquid Crystal Display ) at present. In this technique, the gate driving circuit is directly fabricated on the array substrate, thereby omitting the gate driving integrated circuit portion in order to reduce the cost. The IC area is a binding area between the periphery of the display panel 10 and IC (Integrated Circuit), and the IC area and the GOA area 11 continuously generate heat during the operation of the liquid crystal display panel 10, which affects the service life and display quality of the display screen if the IC area and the GOA area are at a higher temperature for a long time, and causes related defects such as abnormal display of images and black screen. In this embodiment, by providing the first optical waveguide 200 in the IC region and the GOA region 11, the IC region and the GOA region 11 can be subjected to temperature detection, so that the problems of reduced service life, reduced display quality, and the like of the display panel 10 caused by excessively high temperature in the peripheral region of the display panel 10 can be avoided.
As shown in fig. 2 and 3, in some embodiments of the present application, the first optical waveguide 200 includes a top layer 230, a bottom layer 210, and a transmission layer 220 interposed between the bottom layer 210 and the top layer 230, the bottom layer 210 and the top layer 230 having a refractive index greater than that of the transmission layer 220, wherein light emitted by the light source 100 is configured to propagate in the transmission layer 220. In the manufacturing of the display panel 10 of this embodiment, the bottom layer 210 may be directly deposited, the transmission layer 220 is deposited by using a mask, and the top layer 230 is deposited finally. By making the refractive index of both the bottom layer 210 and the top layer 230 greater than that of the transmission layer 220, light emitted from the light source 100 can be compressed and transmitted in the transmission layer 220.
In some embodiments of the present application, the top layer 230 is formed with a grating structure 231 having an uneven shape. Specifically, the grating structures 231 having periodic respective concave-convex structures may be formed on the top layer 230 by etching. The light emitted by the light source 100 generally includes light with multiple wavelengths, which will reach the first light receiver 300 and be detected after propagating in the first light guide 200, and it is understood that, to avoid excessive stray light being received by the first light receiver 300, the first light receiver 300 generally only detects light with a fixed wavelength, and then needs to filter out light with other wavelengths. In this embodiment, the grating structure 231 is formed on the top layer 230, and unwanted light can be emitted from the top by adjusting the refractive index of the top layer 230. That is, when the incident light M emitted from the light source 100 is transmitted in the first optical waveguide 200, the grating structure 231 can emit part of the unwanted light, and retain the wanted light, and transmit along the light transmission path N, so that the light with the fixed wavelength can be transmitted in the first optical waveguide 200, and the first light receiver 300 will also detect the light with the fixed wavelength, thereby more accurately monitoring the temperature of the display panel 10.
In some embodiments of the present application, the top layer 230 is made of silicon nitride, and the bottom layer 210 is made of silicon nitride or silicon oxide. Since silicon nitride or silicon oxide has good chemical stability and also has good optical properties, the top layer 230 may be made of silicon nitride, and the bottom layer 210 may be made of silicon nitride or silicon oxide.
In some embodiments of the present application, the material of the transmission layer 220 is indium tin oxide. Indium tin oxide, also known as ITO (Indium tin oxide), is transparent and has good light transmittance, and thus can be used to fabricate the transmission layer 220, so that the transmission layer 220 has good propagation efficiency.
In a specific example, the material of the bottom layer 210 of the first optical waveguide 200 is silicon nitride, which may be directly deposited, and the material of the transmission layer 220 is ITO. The transmission layer 220 can be formed into the wiring around the display panel 10 through the SD Mask (Mask plate), and this is used as a temperature sensing unit, and by using this method, the transmission layer 220 is formed without adding extra Mask cost, so as to save cost. The top layer 230 may be connected to a PVX layer (Passivation layer) and a periodic grating structure 231 is etched over the top layer 230 by etching.
As shown in fig. 4, in some embodiments of the present application, the display panel 10 further includes a substrate, and a plurality of gate lines 430 and a plurality of data lines 420 disposed on one side of the substrate, wherein the gate lines 430 and the data lines 420 are crisscrossed, and two adjacent gate lines 430 and two adjacent data lines 420 together define a sub-pixel region. The display panel 10 further includes a thin film transistor 410 disposed in each sub-pixel region, and the thin film transistor 410 is connected to the corresponding gate line 430 and data line 420. The gate line 430 and the data line 420 are provided with a second optical waveguide 500 at a side remote from the substrate, and the display panel 10 further includes a second optical receiver 600, and the second optical receiver 600 is in conduction with the second optical waveguide 500. In this embodiment, a second optical waveguide 500 may be disposed above the data line 420 and the gate line 430, and the second optical waveguide 500 is similar to the first optical waveguide 200 in operation principle, which is not described herein. In the related art, the display panel 10 has a backlight source, and the incident light emitted from the backlight source can be used as the source of the light transmitted in the second optical waveguide 500. In addition, the second optical waveguide 500 located above the data line 420 and the second optical waveguide 500 located above the gate line 430 are in different layers. That is, in the present embodiment, the second optical waveguide 500 includes a transverse optical waveguide 510 and a longitudinal optical waveguide 520, which have two transmission loops, and the second optical waveguide 500 located above the data line 420 is a first optical transmission loop, which may also be referred to as a longitudinal optical waveguide 520. The second optical waveguide 500 located above the gate line 430 is a second light transmission loop, and may also be referred to as a lateral optical waveguide 510. In fig. 4, the thin film transistors 410 are arranged in an array in the display area of the display panel 10, and are laterally gate lines 430, and are provided with lateral optical waveguides 510 above them, and are vertically data lines 420, and are provided with vertical optical waveguides 520 above them. The grid line 430 and the data line 420 have a plurality of intersecting points in the display area of the display panel 10, the intersecting positions of the two are temperature change areas, in order to more accurately monitor the temperature of the display area, the area can be coded and set according to the number of pixels, for example, when the number of pixels is 3840×2160, i.e., the number of transverse pixels is 3840, the intersecting points of the transverse direction and the longitudinal direction are numbered sequentially from left to right, for example, from X1 to 3840, the intersecting points of the longitudinal direction and the transverse direction are numbered sequentially from top to bottom, for example, Y1 to 2160, when the second light receiver 300 detects that the signal codes are X1 and Y1 respectively, the coordinates of the corresponding (X1 and Y1) correspond to the unique pixel units, and the like, the light changes of the pixel units at different positions can be detected, so that the temperature changes of a certain pixel point can be accurately known. In this embodiment, by providing the second optical waveguide 500 in the display area of the display panel 10, the temperature of the display area can be monitored, so as to avoid degradation of display quality and reduction of lifetime caused by too high temperature of the display area.
In some embodiments of the present application, the projection of the second optical waveguide 500 onto the substrate is located within the projection of the gate line 430 or the data line 420 onto the substrate. In this embodiment, by disposing the second optical waveguide 500 directly above the gate line 430 or the data line 420, the influence of the second optical waveguide 500 on the aperture ratio of the display panel can be reduced.
In some embodiments of the application, the light source 100 is a fiber optic light source. In this embodiment, the light emitted by the light source 100 needs to be transmitted through the first optical waveguide 200, so the optical fiber light source refers to the light source 100 that can be applied to an optical fiber, such as a light emitting diode and a laser, and the light emitted by the diode and the laser can be transmitted in the first optical waveguide 200 with good stability.
In some embodiments of the present application, the first optical receiver 300 is a photoelectric converter, or the second optical receiver 600 is a photoelectric converter. In the present embodiment, the photoelectric converter is capable of converting an optical signal into an electrical signal using the photoelectric effect. In this way, when the light emitted from the light source 100 is transmitted to the photoelectric converter via the first optical waveguide 200, it is possible to recognize the light and convert the optical signal into an electrical signal. The first light receiver 300 and the second light receiver 600 may each be a photoelectric converter, and are not particularly limited herein.
In some embodiments of the present application, the display panel 10 further includes a timing control chip electrically connected to the light source 100 and/or electrically connected to the first light receiver 300 or the second light receiver 600. In this embodiment, the timing control chip is also referred to as a logic board or TCON (Timer Control Register). When the temperature of a certain point near the optical waveguide 200 in the display panel 10 changes, the optical paths of the two beams of light change due to the thermal expansion effect and the thermo-optical effect, the interference extremum of the two beams of light shifts, the specific temperature value can be demodulated by measuring the extremum shift of the light received by the first optical receiver 300 or the second optical receiver 600, and the specific values of the two optical paths can be demodulated by using the shift of the next-large interference value, so as to obtain the specific position of the corresponding temperature change in the peripheral area of the display panel 10. The timing control chip is electrically connected with the light source 100 or the first light receiver 300 or the second light receiver 600, so that specific data information can be transmitted to the timing control chip in real time, and the timing control chip is correspondingly set, for example, a temperature threshold is set, when the temperature is too high, the alarm can be given, or the information can be integrated into a control IC, and the integrated control unit can perform feedback adjustment, and through internal analysis and calculation, the output current (voltage) is timely reduced, so that the heating condition of the related unit is reduced, and the occurrence of faults is prevented. If the detected temperature value (which can be converted into a voltage value) fed back by the first optical waveguide 200 or the second optical waveguide 500 is within the set threshold value range, alarm and related feedback operations will not occur, and normal display of the picture is ensured.
In some embodiments of the application, the timing control chip further comprises an alarm. In this embodiment, the alarm may be a buzzer or a small LED lamp, or the like. In this way, when the temperature of the display panel 10 is detected to be too high, a real-time alarm can be given.
In some specific embodiments, the light source 100 may be controlled by a timing control chip through a signal line, the first light receiver 300 or the second light receiver 600 may be electrically connected to the timing control chip through a signal line, and connected to an external alarm device through the timing control chip, or the alarm device may be directly integrated on the timing control chip.
As shown in fig. 5, in some embodiments of the present application, the GOA area 11 of the display panel 10 is provided with a first optical waveguide 200, the temperature change of each part of the GOA area 11 of the display panel 10 is detected by the first optical waveguide 200, and when the temperature changes, optical interference changes are caused, and a light change signal transmitted through the first optical waveguide 200 is converted into a voltage signal by a micro photoelectric converter and is transmitted to a control IC terminal, and the control IC terminal performs feedback adjustment by comparing, calculating and judging, so as to reduce the operating voltage (or current), thereby reducing the temperature. In this embodiment, the temperature threshold range may be preset in the control IC, and if the temperature threshold exceeds the threshold, an alarm may be given, and the electric signal processing may be performed synchronously, so as to achieve the purposes of real-time monitoring and adjustment, thereby reducing the risk of defects of the display panel 10 and prolonging the service life of the display panel 10.
As shown in fig. 6, in some specific embodiments of the present application, the pixel area of the display panel 10 is provided with the second optical waveguide 500, and in order to distinguish the pixel area from the first optical waveguide 200 provided in the GOA area 11, the refractive index of the first optical waveguide 200 and the refractive index of the second optical waveguide 500 may be set to different values, for example, the refractive index of the first optical waveguide 200 transmitted in the GOA area 11 is n1, and the refractive index of the second optical waveguide 500 transmitted in the pixel area is n2, and since the light signals transmitted with different refractive indexes are different, the interference fringes and the periods are also different, so that the two can be detected separately. In the present embodiment, the refractive indexes of the first optical waveguide 200 and the second optical waveguide 500 can be achieved by controlling the film thicknesses of the first optical waveguide 200 and the second optical waveguide 500, and the film thicknesses of the first optical waveguide 200 and the second optical waveguide 500 can be obtained by analog of the relevant analog software. The operation principle of the second optical waveguide 500 disposed in the pixel region is identical to that of the first optical waveguide 200 disposed in the GOA region 11, and will not be described herein.
An embodiment of the second aspect of the present application proposes a display device comprising the display panel 10 of any of the embodiments of the first aspect.
The display device according to the embodiment of the present application has the advantages of any embodiment of the first aspect because it has the display panel 10 of any embodiment of the first aspect, specifically, in this embodiment, the first optical waveguide 200 is disposed at least in the IC area or the GOA area 11 of the display panel 10, and the first optical waveguide 200 is electrically connected to the light source 100, so that the light emitted by the light source 100 can be transmitted in the first optical waveguide 200, and the first optical receiver 300 is used for receiving the light transmitted in the first optical waveguide 200. When the temperature of a certain point near the first optical waveguide 200 in the display panel 10 changes, the optical paths of the two beams of light change due to the thermal expansion effect and the thermo-optical effect, the interference extremum of the two beams of light shifts, the specific temperature value can be demodulated by measuring the extremum shift of the light received by the first optical receiver 300, and the specific values of the two optical paths can be demodulated by using the shift of the next-to-interference value, so as to obtain the specific position of the corresponding temperature change in the IC area or the GOA area 11 of the display panel 10. In this way, the temperature of the IC area or the GOA area 11 of the display panel 10 can be detected in real time, so as to avoid the problems of reduced service life and reduced display quality of the display panel 10 caused by too high temperature of the IC area or the GOA area 11 of the display panel 10.
It should be noted that the display panel in this embodiment may be applied to various technical fields such as LCD, OLED, Q-LED and Micro-LED, so as to improve display performance and display lifetime.
Note that, the display device in this embodiment may be: electronic paper, mobile phone, tablet computer, television, notebook computer, digital photo frame, navigator and any other products or components with display function.
It is noted that in the drawings, the size of layers and regions may be exaggerated for clarity of illustration. Moreover, it will be understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element or intervening layers may be present. In addition, it will be understood that when an element or layer is referred to as being "under" another element or layer, it can be directly under the other element or intervening layers or elements may be present. In addition, it will be understood that when a layer or element is referred to as being "between" two layers or elements, it can be the only layer between the two layers or elements, or more than one intervening layer or element may also be present. Like reference numerals refer to like elements throughout.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The various embodiments of the present application are described in a related manner, and identical and similar parts of the various embodiments are all mutually referred to, and each embodiment is mainly described in terms of differences from the other embodiments.
The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are included in the protection scope of the present application.
Claims (11)
1. A display panel comprising a display area and a peripheral area located at the periphery of the display area, the peripheral area comprising an IC area and a GOA area, the display panel further comprising:
a light source;
the first optical waveguide, at least a part of the first optical waveguide is arranged in the IC area and/or the GOA area, two ends of the first optical waveguide are respectively communicated with the light source, and the first optical waveguide is configured to enable light rays emitted by the light source to propagate through the first optical waveguide;
a first optical receiver in communication with the first optical waveguide, the first optical receiver configured to receive light propagating in the first optical waveguide;
the display panel further comprises a substrate base plate, a plurality of grid lines and a plurality of data lines which are arranged on one side of the substrate base plate, the grid lines and the data lines are arranged in a crisscross mode, two adjacent grid lines and two adjacent data lines jointly define a sub-pixel area, the display panel further comprises a thin film transistor which is arranged in each sub-pixel area, the thin film transistor is connected with the corresponding grid lines and the data lines, a second optical waveguide is arranged on one side, away from the substrate base plate, of the grid lines and the data lines, and the display panel further comprises a second optical receiver which is conducted with the second optical waveguide.
2. The display panel of claim 1, wherein the first optical waveguide comprises a top layer, a bottom layer, and a transmission layer sandwiched between the bottom layer and the top layer, the bottom layer and the top layer having a refractive index greater than a refractive index of the transmission layer, the light emitted by the light source being configured to propagate at the transmission layer.
3. The display panel according to claim 2, wherein the top layer is formed with a grating structure having an uneven shape.
4. A display panel according to claim 3, wherein the top layer is made of silicon nitride and the bottom layer is made of silicon nitride or silicon oxide.
5. The display panel according to claim 2, wherein the material of the transmission layer is indium tin oxide.
6. The display panel of claim 1, wherein a projection of the second optical waveguide onto the substrate is within a projection of the gate line or the data line onto the substrate.
7. The display panel of claim 1, wherein the light source is a fiber optic light source.
8. The display panel according to claim 1, wherein the first light receiver is a photoelectric converter and/or the second light receiver is a photoelectric converter.
9. The display panel of claim 1, further comprising a timing control chip electrically connected to the light source and/or the timing control chip electrically connected to the first light receiver or the second light receiver.
10. The display panel of claim 9, wherein the timing control chip further comprises an alarm.
11. A display device characterized by comprising the display panel according to any one of claims 1 to 10.
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| CN202210795200.5A CN115061306B (en) | 2022-07-07 | 2022-07-07 | Display panel and display device |
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| EP3757633B1 (en) * | 2018-02-22 | 2024-04-03 | Nippon Telegraph And Telephone Corporation | Waveguide type optical interferometer circuit |
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