CN113362753A - Display panel and display device - Google Patents
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- CN113362753A CN113362753A CN202110612900.1A CN202110612900A CN113362753A CN 113362753 A CN113362753 A CN 113362753A CN 202110612900 A CN202110612900 A CN 202110612900A CN 113362753 A CN113362753 A CN 113362753A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/2003—Display of colours
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
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- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Electroluminescent Light Sources (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The invention discloses a display panel and a display device, wherein the display panel comprises a substrate, a light-emitting device layer positioned on one side of the substrate and a thermoelectric generation layer positioned between the substrate and the light-emitting device layer, the thermoelectric generation layer comprises a first electric heat conduction layer, a current generation layer and a second electric heat conduction layer, the first electric heat conduction layer, the current generation layer and the second electric heat conduction layer are arranged in the direction from the substrate to the light-emitting device layer, and the current generation layer is used for generating current according to the temperature difference between the first electric heat conduction layer and the second electric heat conduction layer to generate the flow of carriers to form current and outputting the current to a structure to be powered of the display panel. The thermoelectric generation layer of the embodiment of the invention generates electric energy by utilizing the temperature difference at two sides, realizes the conversion of heat energy into electric energy, absorbs the heat of the luminescent device layer to reduce the temperature of the display panel during displaying, and realizes the reduction of the power consumption of the display panel by supplying the electric energy converted by the heat of the thermoelectric generation layer to the structure to be powered of the display panel.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a display panel and a display device.
Background
Display panels, especially silicon-based display panels, have been developed very rapidly due to their excellent characteristics of brightness, rich colors, low driving voltage, fast response speed, low power consumption, etc.
At present, when a display panel displays, the temperature of a screen body of the display panel is higher, especially a silicon-based display panel. The silicon-based display panel generally adopts a device structure of a white light emitting layer and a color filter, but the transmittance of the color filter is low, so that the device needs high brightness and power consumption. Due to the requirement of higher brightness, the screen body can generate higher temperature and the power consumption can be greatly improved.
Disclosure of Invention
The invention provides a display panel and a display device, which are used for reducing the temperature of the display panel and the power consumption of a power supply connected with the display panel.
In a first aspect, an embodiment of the present invention provides a display panel, including:
a substrate;
a light emitting device layer on one side of the substrate, the light emitting device layer including a plurality of light emitting devices;
the thermoelectric generation layer is located the base plate with between the light emitting device layer, the thermoelectric generation layer includes certainly the base plate is directional first electrically conductive heat-conducting layer, electric current that the light emitting device layer direction set up produce layer and the electrically conductive heat-conducting layer of second, the electric current produces the layer be used for according to first electrically conductive heat-conducting layer with the difference in temperature of the electrically conductive heat-conducting layer of second produces the flow of carrier and forms the electric current and export extremely display panel's the structure of waiting to supply power.
Optionally, the display panel further includes a driving circuit layer, the driving circuit layer is disposed between the substrate and the light emitting device layer, the driving circuit layer includes a plurality of pixel circuits, and the pixel circuits are electrically connected to the light emitting devices corresponding to the light emitting device layer;
the temperature difference power generation layer is arranged in an insulating mode with the driving circuit layer and the light-emitting device layer.
Optionally, the thermoelectric generation layer is located between the substrate and the driving circuit layer.
Optionally, the thermoelectric generation layer is located between the driving circuit layer and the light emitting device layer.
Optionally, the thermoelectric generation layer includes a plurality of thermoelectric generation units, and each thermoelectric generation unit includes a first sub-conductor, a second sub-conductor, an N-type semiconductor, a P-type semiconductor, and a third sub-conductor;
the first sub-conductor and the second sub-conductor are both positioned on the first electric heat conduction layer, the N-type semiconductor and the P-type semiconductor are both positioned on the current generation layer, and the third sub-conductor is positioned on the second electric heat conduction layer;
the upper surface of N type semiconductor with the third sub-conductor contact, the lower surface of N type semiconductor with first sub-conductor contact, the upper surface of P type semiconductor with the third sub-conductor contact, the lower surface of P type semiconductor with the second sub-conductor contact, it is same N type semiconductor and P type semiconductor of thermoelectric generation unit set up with P type semiconductor is insulating, it is same first sub-conductor and the insulating setting of second sub-conductor of thermoelectric generation unit.
Optionally, the thermoelectric generation units are arranged in an array; in the thickness direction of the display panel, the thermoelectric generation unit is arranged corresponding to at least one light-emitting device;
in a first direction, the second sub-conductor of the thermoelectric generation unit is in contact with the first sub-conductor of another adjacent thermoelectric generation unit, and a plurality of thermoelectric generation units which are mutually connected form a power generation module along the first direction;
in a second direction, first sub-conductors at first ends of the power generation modules are connected with each other to serve as a first output end, second sub-conductors at second ends of the power generation modules are connected with each other to serve as a second output end, and the first output end and the second output end are connected with the structure to be powered;
the first direction intersects the second direction.
Optionally, in the thickness direction of the display panel, the thermoelectric generation units and the light emitting devices are arranged in a one-to-one correspondence manner.
Optionally, the display panel further includes a heat insulating layer, and the heat insulating layer is located on one side of the first electrically and thermally conductive layer close to the substrate.
Optionally, the display panel further includes a heat conducting medium layer, and the heat conducting medium layer is located between the light emitting device layer and the thermoelectric generation layer.
In a second aspect, an embodiment of the present invention further provides a display device, where the display device includes the display panel according to any one of the first aspects.
The embodiment of the invention provides a display panel and a display device, wherein the display panel comprises a substrate, a light-emitting device layer positioned on one side of the substrate and a thermoelectric generation layer positioned between the substrate and the light-emitting device layer, the thermoelectric generation layer comprises a first electric heat conduction layer, a current generation layer and a second electric heat conduction layer, the first electric heat conduction layer, the current generation layer and the second electric heat conduction layer are arranged in the direction from the substrate to the light-emitting device layer, and the current generation layer is used for generating current according to the flow of carriers generated by the temperature difference between the first electric heat conduction layer and the second electric heat conduction layer and outputting the current to a structure to be powered of the display panel. The thermoelectric generation layer of the embodiment of the invention generates electric energy by utilizing the temperature difference at two sides, realizes the conversion of heat energy into electric energy, absorbs the heat of the luminescent device layer to reduce the temperature of the display panel during displaying, and realizes the reduction of the power consumption of the display panel by supplying the electric energy converted by the heat of the thermoelectric generation layer to the structure to be powered of the display panel.
Drawings
Fig. 1 is a schematic cross-sectional structure diagram of a display panel according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention;
fig. 5 is a top view of a display panel according to an embodiment of the present invention;
FIG. 6 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention;
FIG. 7 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
As described in the background art, when the conventional display panel performs normal display, the temperature of the display panel is high, so that the use experience of the display panel is poor. The inventor finds that the above problems occur because, as the light emitting time of the light emitting device in the light emitting device layer of the display panel in the prior art is prolonged, the heat generated by the light emitting device due to light emission is higher and higher, and especially, the silicon-based display panel generally adopts a structure of a white light emitting layer and a color filter, and the structure transmittance of the color filter is lower, so that the light emitting device needs higher brightness and power consumption, and the display panel itself needs higher temperature and the power consumption is also improved due to the need of higher brightness.
For the above reasons, an embodiment of the present invention provides a display panel, and fig. 1 is a schematic cross-sectional structure diagram of the display panel provided in the embodiment of the present invention, and referring to fig. 1, the display panel includes:
a substrate 100;
a light emitting device layer 200, the light emitting device layer 200 being positioned at one side of the substrate 100, the light emitting device layer including a plurality of light emitting devices;
the thermoelectric generation layer 300 is located between the substrate 100 and the light emitting device layer 200, the thermoelectric generation layer 300 includes a first electrically and thermally conductive layer 310, a current generation layer 320 and a second electrically and thermally conductive layer 330, which are disposed in a direction from the substrate 100 to the light emitting device layer 200, and the current generation layer 320 is configured to generate a current according to a flow of carriers generated by a temperature difference between the first electrically and thermally conductive layer 310 and the second electrically and thermally conductive layer 330, and output the current to a to-be-powered structure of the display panel.
Specifically, the substrate 100 may be a silicon substrate, and may also be a rigid substrate formed by at least one of polymer materials such as glass and glass fiber reinforced plastic, or a flexible substrate formed by at least one of Polyimide (PI), polyethylene naphthalate (PEN), or polyethylene terephthalate (PET), and the embodiment is not limited in particular herein. The circuit device formed on the silicon substrate is much smaller in structure size than a circuit device formed on a hard substrate such as glass or a flexible substrate made of a polyimide material, and is suitable for a microdisplay, while the hard substrate such as glass or the flexible substrate made of a polyimide material is suitable for a display device such as a mobile phone having a slightly larger size.
The light emitting device layer 200 may be an organic light emitting diode OLED light emitting device layer, a liquid crystal light emitting device layer, a quantum dot light emitting diode QLED light emitting device layer, a micro light emitting diode micro led light emitting device layer, or the like, and the embodiment of the present invention is not limited specifically herein. The light emitting device layer 200 performs display of the display panel by emitting light.
The first electrically and thermally conductive layer 310 and the second electrically and thermally conductive layer 330 of the thermoelectric generation layer 300 are both of a conductor structure, the current generation layer 320 may be of a semiconductor structure, and when there is a temperature difference between the first electrically and thermally conductive layer 310 side and the second electrically and thermally conductive layer 330 side, carriers in the current generation layer 320 flow from the side with a high temperature to the side with a low temperature. Wherein the carriers include positive and negative charges. The light emitting devices in the light emitting device layer 200 generate heat when emitting light, so that the temperature of the light emitting device layer 200 is high, the temperature of the second electrically and thermally conductive layer 330 is higher than that of the first electrically and thermally conductive layer 310, and positive charges and negative charges in the current generating layer 320 flow to the first electrically and thermally conductive layer 310 through the second electrically and thermally conductive layer 330, so that current is generated in the thermoelectric generation layer 300, thereby converting heat energy in the display panel into electric energy and reducing the temperature of the light emitting device layer 200. Meanwhile, the current formed by the thermoelectric generation layer 300 can be output to a structure to be powered of the display panel to supply power to the structure to be powered, so that the power consumption of the display panel is reduced. The structure to be powered may be a pixel circuit for driving the light emitting device to emit light.
The embodiment provides a display panel and a display device, wherein the display panel comprises a substrate, a light emitting device layer located on one side of the substrate, and a thermoelectric generation layer located between the substrate and the light emitting device layer, the thermoelectric generation layer comprises a first electric conduction and heat conduction layer, a current generation layer and a second electric conduction and heat conduction layer, the first electric conduction and heat conduction layer, the current generation layer and the second electric conduction and heat conduction layer are arranged in the direction from the substrate to the light emitting device layer, and the current generation layer is used for generating current according to the flow of carriers generated by the temperature difference between the first electric conduction and heat conduction layer and the second electric conduction and heat conduction layer and outputting the current to a to-be-powered structure of the display panel. The thermoelectric generation layer of this embodiment utilizes the difference in temperature of both sides to produce the electric energy, realizes converting heat energy into the electric energy, and the thermoelectric generation layer absorbs the heat on luminescent device layer to reduce display panel's temperature when showing, and supply with display panel's the structure of waiting to supply power through the electric energy with thermoelectric generation layer through heat conversion, realize reducing display panel's consumption.
On the basis of the foregoing embodiment, fig. 2 is a schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present invention, and referring to fig. 2, optionally, the display panel further includes a driving circuit layer 400, the driving circuit layer 400 is disposed between the substrate 100 and the light emitting device layer 200, the driving circuit layer 400 includes a plurality of pixel circuits (not shown in fig. 2), and the pixel circuits are electrically connected to the light emitting devices 201 corresponding to the light emitting device layer 200.
The thermoelectric generation layer 300 is insulated from the driving circuit layer 400 and the light emitting device layer 200.
The driving circuit layer 400 includes a plurality of thin film transistors and capacitors for constituting pixel circuits, and the light emitting devices in the light emitting device layer 200 emit light under driving of the pixel circuits. One pixel circuit may be connected to one light emitting device 201, or may be connected to a plurality of light emitting devices, and this embodiment is not limited in this embodiment.
Taking the example that the light emitting device layer 200 is an OLED light emitting device layer as an example, the light emitting device layer 200 includes a plurality of light emitting devices 201, each light emitting device 201 includes a first electrode layer 210, a light emitting layer 220, and a second electrode layer 230, which are stacked, the first electrode layer 210 may be an anode layer, the first electrode layer 210 includes a plurality of first electrodes insulated from each other, and the second electrode layer 230 may be a cathode layer. The light emitting layer 220 may include only a single layer, that is, only a light emitting material layer, or may include a multi-layer structure formed by a hole injection layer, a hole transport layer, a light emitting material layer, an electron transport layer, an electron injection layer, and the like, which are stacked from the first electrode layer 210 to the second electrode layer 230. The light emitting layer 220 in this embodiment includes only a light emitting material layer. When the substrate 100 is a silicon substrate with a smaller size, the light emitting layer 220 may be a white light emitting layer laid on the whole layer, as shown in fig. 2, to reduce the difficulty of the preparation process, and a color filter layer (not shown) is additionally provided to cover the white light emitting layer to realize the display of multiple colors; when the substrate 100 is a large-sized hard substrate or a large-sized flexible substrate, the light emitting layer 220 may include at least a red light emitting layer, a green light emitting layer, and a blue light emitting layer, thereby realizing multi-color display.
The thermoelectric generation layer 300 is arranged in an insulating manner with the driving circuit layer 400 and the light emitting device layer 200, so that the current generated by the thermoelectric generation layer 300 is prevented from interfering the pixel circuit and the light emitting device, and the normal light emission of the light emitting device is prevented from being influenced.
With continued reference to fig. 2, optionally, a thermoelectric generation layer 300 is positioned between the driving circuit layer 400 and the light emitting device layer 200.
Specifically, when the thermoelectric generation layer 300 is located between the driving circuit layer 400 and the light emitting device layer 200, the second electrically and thermally conductive layer 330 is located on the side of the current generation layer 320 close to the light emitting device layer 200, the first electrically and thermally conductive layer 310 is located on the side of the current generation layer 320 close to the driving circuit layer 400, when the light emitting device 201 in the light emitting device layer 200 emits light, the temperature of the light emitting device layer 200 is higher, and further the temperature of the second electrically and thermally conductive layer 330 is higher than that of the first electrically and thermally conductive layer 310, carriers in the current generation layer 320 flow from the second electrically and thermally conductive layer 330 to the first electrically and thermally conductive layer 310, and further a current is formed in the thermoelectric generation layer 300, so that heat generated by the light emitting device layer 200 is converted into electric energy which is transmitted to a structure to be powered. The thermoelectric generation layer 300 converts the absorbed heat of the light emitting device layer 200 into electric energy, thereby reducing the temperature of the light emitting device layer 200, and simultaneously, transmits the generated electric energy to a structure to be powered of the display panel, thereby reducing the power consumption of the display panel.
Fig. 3 is a schematic cross-sectional structure diagram of another display panel according to an embodiment of the present invention, and referring to fig. 3, optionally, the thermoelectric generation layer 300 is located between the substrate 100 and the driving circuit layer 400.
Specifically, when the thermoelectric generation layer 300 is located between the substrate 100 and the driving circuit layer 400, the second electrically and thermally conductive layer 330 is closer to the light emitting device layer 200 than the first electrically and thermally conductive layer 310, and the light emitting device 201 in the light emitting device layer 200 makes the temperature of the light emitting device layer higher when emitting light, so that the temperature of the second electrically and thermally conductive layer 330 closer to the light emitting device layer 200 is greater than the temperature of the first electrically and thermally conductive layer 310, so that carriers in the current generation layer 320 flow from the second electrically and thermally conductive layer 330 to the first electrically and thermally conductive layer 310, and further generate current, thereby converting heat generated by the light emitting device layer 200 into electric energy and transmitting the electric energy to a structure to be powered. The thermoelectric generation layer 300 converts the absorbed heat of the light emitting device layer 200 into electric energy, thereby reducing the temperature of the light emitting device layer 200, and simultaneously, transmits the generated electric energy to a structure to be powered of the display panel, thereby reducing the power consumption of the display panel.
Fig. 4 is a schematic cross-sectional structure diagram of another display panel according to an embodiment of the present invention, and referring to fig. 4, optionally, the thermoelectric generation layer 300 includes a plurality of thermoelectric generation units 340, and each thermoelectric generation unit 340 includes a first sub-conductor 301, a second sub-conductor 302, an N-type semiconductor 303, a P-type semiconductor 304, and a third sub-conductor 305.
The first and second sub-conductors 301, 302 are located in the first electrically and thermally conductive layer 310, the N-type and P- type semiconductors 303, 304 are located in the current-generating layer 320, and the third sub-conductor 305 is located in the second electrically and thermally conductive layer 330.
The upper surface of the N-type semiconductor 303 is in contact with the third sub-conductor 305, the lower surface of the N-type semiconductor 303 is in contact with the first sub-conductor 301, the upper surface of the P-type semiconductor 304 is in contact with the third sub-conductor 305, the lower surface of the P-type semiconductor 304 is in contact with the second sub-conductor 302, the N-type semiconductor 303 and the P-type semiconductor 304 of the same thermoelectric generation unit 340 are arranged in an insulated manner, and the first sub-conductor 301 and the second sub-conductor 302 of the same thermoelectric generation unit 340 are arranged in an insulated manner.
Specifically, the first sub-conductor 301 and the second sub-conductor 302 may be metal wires, and the first sub-conductor 301 and the second sub-conductor 302 may be made of the same material or different materials, which is not limited in this embodiment. The N-type semiconductor 303 and the P-type semiconductor 304 may be made of one of bismuth telluride, antimony telluride, bismuth selenide, lead telluride, and the like, wherein the N-type semiconductor 303 and the P-type semiconductor 304 may be made of the same material or different materials. The carriers in the N-type semiconductor 303 are negative charges, and the carriers in the P-type semiconductor 304 are positive charges, so when the negative charges in the N-type semiconductor 303 and the positive charges in the P-type semiconductor 304 flow from the second electrically and thermally conductive layer 330 to the first electrically and thermally conductive layer 310, electromotive forces are formed between the first sub-conductor 301 and the second sub-conductor 302 of the same thermoelectric power generation unit 340, and further, thermal energy is directly converted into electric energy by using temperature difference.
Fig. 5 is a top view of a display panel according to an embodiment of the present invention, fig. 6 is a schematic cross-sectional structure diagram of another display panel according to an embodiment of the present invention, fig. 6 can be obtained by cutting along AA' in fig. 5, and referring to fig. 5 and fig. 6, optionally, the thermoelectric generation units 340 are arranged in an array; the thermoelectric generation unit 340 is disposed corresponding to the at least one light emitting device 201 in the thickness direction of the display panel.
The second sub-conductor 302 of the thermoelectric generation unit 340 is in contact with the first sub-conductor 301 of another adjacent thermoelectric generation unit 340 in the first direction X, and the plurality of thermoelectric generation units 340 connected to each other constitute the power generation module 350 in the first direction X.
In the second direction Y, the first sub-conductors 301 of the first ends of the power generation modules 350 are connected with each other as a first output terminal U1, the second sub-conductors 302 of the second ends of the power generation modules 350 are connected with each other as a second output terminal U2, and the first output terminal U1 and the second output terminal U2 are connected with the structure to be powered.
The first direction X intersects the second direction Y.
Specifically, fig. 6 schematically shows only one light emitting device 201. In the thickness direction of the display panel, the projection of one thermoelectric generation unit 340 on the substrate may cover the projection of one light emitting device 201 on the substrate, i.e., the thermoelectric generation units 340 may be arranged in one-to-one correspondence with the light emitting devices 201. In this embodiment, a driving circuit layer 400 is further included between the substrate 100 and the first electrically and thermally conductive layer 310, the driving circuit layer 400 is oriented to the light emitting device layer 200 from the substrate 100, and includes a gate 410, a gate insulating layer 420, a channel layer 430, an interlayer insulating layer 440, and a source drain layer 450, which are sequentially stacked, a heat insulating layer 500 is disposed on one side of the source drain layer 450 away from the substrate 100, and a planarization layer 700 is disposed between the thermoelectric generation layer 300 and the light emitting device layer 200. The first electrode layer 210, i.e., the anode, of the light emitting device 201 is connected to the source drain layer 450 through the via hole, so that the pixel circuit in the driving circuit layer 400 is connected to the light emitting device 201 to drive the light emitting device 201 to emit light. It is to be noted that the thin film transistor in the pixel circuit in the driving circuit layer 400 is exemplarily shown as a bottom-gate structure in this embodiment, that is, the gate 410 is located on the side of the channel layer 430 close to the substrate 100, and the thin film transistor in the pixel circuit in other embodiments may be a top-gate structure.
The first end of the power generation module 350 may be in the first direction X, the leftmost end of the plurality of thermoelectric power generation units 340 connected to each other, the second end of the power generation module 350 may be the rightmost end of the plurality of thermoelectric power generation units 340 connected to each other, the electric energy generated by the plurality of thermoelectric power generation units 340 between the first output end U1 and the second output end U2 of the display panel, the structure to be powered, which connects the display panel between the first output end U1 and the second output end U2, and the electric energy generated by the thermoelectric power generation units 340 may be supplied to the structure to be powered.
The thermoelectric generation unit 340 corresponds to at least one light emitting device 201, so that the thermoelectric generation unit 340 absorbs heat generated when the light emitting device 201 emits light, and converts the heat into electric energy to supply power to the display panel, thereby reducing the temperature of the display panel, and meanwhile, the electric energy generated by the thermoelectric generation unit 340 can supply power to the display panel, thereby reducing the power consumption of the display panel.
With continued reference to fig. 5, alternatively, the thermoelectric generation units 340 are disposed in one-to-one correspondence with the light emitting devices 201 in the thickness direction of the display panel.
The thermoelectric generation unit 340 and the light emitting device 201 are arranged in a one-to-one correspondence manner, so that the thermoelectric generation unit 340 can absorb heat generated by the light emitting device 201 to the greatest extent, and convert the heat into electric energy to supply power to the display panel, thereby reducing the temperature of the display panel, and meanwhile, the electric energy generated by the thermoelectric generation unit 340 can supply power to the display panel, thereby reducing the power consumption of the display panel.
Fig. 7 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention, and referring to fig. 7, the display panel further includes an insulating layer 500, where the insulating layer 500 is located on a side of the first layer 310 close to the substrate 100.
Specifically, the display panel exemplarily shown in fig. 7 further includes a driving circuit layer 400, the driving circuit layer 400 is positioned between the substrate 100 and the light emitting device layer 200, and the thermoelectric generation layer 300 is positioned between the driving circuit layer 400 and the light emitting device layer 200.
The heat insulating layer 500 is used for insulating heat from the first electrically and thermally conductive layer 310, so as to prevent the temperature of the substrate 100 from spreading to the first electrically and thermally conductive layer 310, when the thermoelectric generation layer 300 is located between the driving circuit layer 400 and the light emitting device layer 200, the driving circuit layer 400 will also generate a certain amount of heat during the operation of the display panel, and the heat insulating layer 500 prevents the heat in the driving circuit layer 400 from spreading to the first electrically and thermally conductive layer 310.
The heat insulating layer 500 prevents the temperature of the substrate 100 from spreading to the first conductive layer 310, so that a certain temperature difference exists between the first conductive layer 310 and the second conductive layer 330, and the thermoelectric generation unit 340 is prevented from converting the heat energy into the electric energy.
In other embodiments, the thermoelectric generation layer may be located between the substrate and the driving circuit layer, and the heat insulating layer is located between the first electrically and thermally conductive layer and the substrate, and the heat insulating layer blocks the temperature on the substrate side from diffusing to the first electrically and thermally conductive layer.
With continued reference to fig. 7, optionally, the display panel further includes a heat conductive medium layer 600, the heat conductive medium layer 600 being located between the light emitting device layer 200 and the thermoelectric generation layer 300.
Specifically, the heat conducting medium layer 600 is used for transferring heat in the light emitting device layer 200 to the second electrically and heat conducting layer 330 of the thermoelectric generation layer 300, so that a certain temperature difference exists between the first electrically and heat conducting layer 310 and the second electrically and heat conducting layer 330, which is beneficial for the thermoelectric generation layer 300 to convert heat energy into electric energy.
The planarization layer 700 in fig. 6 may serve as the heat conductive medium layer 600.
In other embodiments, when the display panel is structured as shown in fig. 3 and the thermoelectric generation layer 300 is located between the driving circuit layer 400 and the substrate 100, the heat-conducting medium layer may be located only between the driving circuit layer 400 and the second electrically and thermally conductive layer 330, only between the first electrode layer 210 and the driving circuit layer 400, or between the driving circuit layer 400 and the second electrically and thermally conductive layer 330, and between the first electrode layer 210 and the driving circuit layer 400, the heat-conducting medium layer may be included.
Fig. 8 is a schematic structural diagram of a display device according to an embodiment of the present invention, and referring to fig. 8, the display device 10 includes the display panel 01 in any of the embodiments.
Specifically, the display device 10 may be a mobile phone as shown in fig. 8, a computer, a television, an intelligent wearable display device, or an AR/VR micro-display device, which is not limited in this embodiment of the present invention.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A display panel, comprising:
a substrate;
a light emitting device layer on one side of the substrate, the light emitting device layer including a plurality of light emitting devices;
the thermoelectric generation layer is located the base plate with between the light emitting device layer, the thermoelectric generation layer includes certainly the base plate is directional first electrically conductive heat-conducting layer, electric current that the light emitting device layer direction set up produce layer and the electrically conductive heat-conducting layer of second, the electric current produces the layer be used for according to first electrically conductive heat-conducting layer with the difference in temperature of the electrically conductive heat-conducting layer of second produces the flow of carrier and forms the electric current and export extremely display panel's the structure of waiting to supply power.
2. The display panel according to claim 1, further comprising a driving circuit layer disposed between the substrate and the light-emitting device layer, the driving circuit layer including a plurality of pixel circuits electrically connected to the light-emitting devices corresponding to the light-emitting device layer;
the temperature difference power generation layer is arranged in an insulating mode with the driving circuit layer and the light-emitting device layer.
3. The display panel according to claim 2, wherein the thermoelectric generation layer is located between the driving circuit layer and the light emitting device layer.
4. The display panel according to claim 2, wherein the thermoelectric generation layer is located between the substrate and the driving circuit layer.
5. The display panel according to claim 1, wherein the thermoelectric generation layer comprises a plurality of thermoelectric generation cells including a first sub-conductor, a second sub-conductor, an N-type semiconductor, a P-type semiconductor, and a third sub-conductor;
the first sub-conductor and the second sub-conductor are both positioned on the first electric heat conduction layer, the N-type semiconductor and the P-type semiconductor are both positioned on the current generation layer, and the third sub-conductor is positioned on the second electric heat conduction layer;
the upper surface of N type semiconductor with the third sub-conductor contact, the lower surface of N type semiconductor with first sub-conductor contact, the upper surface of P type semiconductor with the third sub-conductor contact, the lower surface of P type semiconductor with the second sub-conductor contact, it is same N type semiconductor and P type semiconductor of thermoelectric generation unit set up with P type semiconductor is insulating, it is same first sub-conductor and the insulating setting of second sub-conductor of thermoelectric generation unit.
6. The display panel according to claim 5, wherein the thermoelectric generation cells are arranged in an array; in the thickness direction of the display panel, the thermoelectric generation unit is arranged corresponding to at least one light-emitting device;
in a first direction, the second sub-conductor of the thermoelectric generation unit is in contact with the first sub-conductor of another adjacent thermoelectric generation unit, and a plurality of thermoelectric generation units which are mutually connected form a power generation module along the first direction;
in a second direction, first sub-conductors at first ends of the power generation modules are connected with each other to serve as a first output end, second sub-conductors at second ends of the power generation modules are connected with each other to serve as a second output end, and the first output end and the second output end are connected with the structure to be powered;
the first direction intersects the second direction.
7. The display panel according to claim 6, wherein the thermoelectric generation units are provided in one-to-one correspondence with the light emitting devices in a thickness direction of the display panel.
8. The display panel of claim 1, further comprising a thermal insulation layer on a side of the first layer proximate to the substrate.
9. The display panel according to claim 1, further comprising a heat-conductive medium layer between the light-emitting device layer and the thermoelectric generation layer.
10. A display device characterized by comprising the display panel according to any one of claims 1 to 9.
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