CN112435586B - Display panel and display device - Google Patents
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- CN112435586B CN112435586B CN202011384447.5A CN202011384447A CN112435586B CN 112435586 B CN112435586 B CN 112435586B CN 202011384447 A CN202011384447 A CN 202011384447A CN 112435586 B CN112435586 B CN 112435586B
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- 230000017525 heat dissipation Effects 0.000 claims abstract description 159
- 238000002834 transmittance Methods 0.000 claims abstract description 12
- 230000007704 transition Effects 0.000 claims description 33
- 230000003287 optical effect Effects 0.000 claims description 18
- 239000002184 metal Substances 0.000 claims description 17
- 239000003086 colorant Substances 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 12
- 230000005855 radiation Effects 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
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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
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20954—Modifications to facilitate cooling, ventilating, or heating for display panels
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- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The embodiment of the application provides a display panel and a display device, which comprise a conventional display area and a light-transmitting functional area, wherein the conventional display area at least partially surrounds the light-transmitting functional area; a plurality of first sub-pixels are arranged in the conventional display area, a plurality of second sub-pixels are arranged in the light transmitting function area, and the light transmittance of the light transmitting function area in the display panel is greater than that of the conventional display area; the display panel comprises at least two conductive film layers along the thickness direction of the display panel; the light-transmitting functional area further comprises a plurality of first heat dissipation structures, and the first heat dissipation structures and at least one of the at least two conductive film layers are arranged on the same layer. According to the technical scheme, the first heat dissipation structure is arranged at the position of the light-transmitting functional area, so that the heat dissipation effect of the light-transmitting functional area is basically consistent with that of a conventional display area; and the first heat dissipation structure and at least one conductive film layer inherent in the display panel are arranged on the same layer, so that the realization is easy and the thickness of the display panel is not increased.
Description
[ technical field ] A method for producing a semiconductor device
The application relates to the technical field of display, in particular to a display panel and a display device.
[ background of the invention ]
With the increase of consumer demand, full-screen display is becoming the mainstream display technology. The existing full-screen display is usually provided with a light-transmitting functional area in a display area, the position of the light-transmitting functional area is used for arranging an optical device, and because the optical device is not arranged in a non-display area, the frame of the display screen is narrowed, so that full-screen display can be realized. The light-transmitting functional area can display and transmit external light at the same time, and in order to ensure the light transmittance of the light-transmitting functional area, no or few light-shielding structures are arranged in the light-transmitting functional area, for example, no metal wiring and no pixel circuit are arranged.
When the densities of the metal wires and the pixel circuits in the light-transmitting functional area and the conventional display area are different, the heat dissipation effects of the light-transmitting functional area and the conventional display area are different, and the temperature of the light-transmitting functional area is higher than that of the conventional display area. However, the display characteristics of the display screen are affected by the higher temperature, and the display effect of the light-transmitting functional region and the display effect of the conventional display region are obviously different, for example, the light-transmitting functional region has an abnormal phenomenon of being dark compared with the conventional display region.
[ application contents ]
In view of the above, embodiments of the present application provide a display panel and a display device to solve the above problems.
In a first aspect, an embodiment of the present application provides a display panel, including a regular display area and a light-transmissive functional area, where the regular display area at least partially surrounds the light-transmissive functional area; a plurality of first sub-pixels are arranged in the conventional display area, a plurality of second sub-pixels are arranged in the light transmitting function area, and the light transmittance of the light transmitting function area in the display panel is greater than that of the conventional display area; the display panel comprises at least two conductive film layers along the thickness direction of the display panel; the light-transmitting functional area further comprises a plurality of first heat dissipation structures, and the first heat dissipation structures and at least one of the at least two conductive film layers are arranged on the same layer.
In one implementation of the first aspect, the heat dissipation structure is curvilinear.
In one implementation manner of the first aspect, the normal display area includes a plurality of first pixel circuits and a plurality of first signal lines, and the first pixel circuits in the normal display area are electrically connected to the first sub-pixels in the normal display area correspondingly and are electrically connected to the first signal lines in the normal display area; the light-transmitting functional area comprises a plurality of second pixel circuits and a plurality of second signal lines, and the second pixel circuits in the light-transmitting functional area are correspondingly and electrically connected with the second sub-pixels in the light-transmitting functional area and electrically connected with the second signal lines in the light-transmitting functional area; the density of the second pixel circuits in the light-transmitting functional area is smaller than that of the first pixel circuits in the conventional display area, and the density of the second signal lines is smaller than that of the first signal lines.
In one implementation form of the first aspect, the display panel further comprises a transition region located between the normal display region and the light transmissive functional region; the conventional display area comprises a plurality of first pixel circuits and first signal lines, wherein the first pixel circuits in the conventional display area are correspondingly and electrically connected with the first sub-pixels in the conventional display area and are electrically connected with the first signal lines in the conventional display area; the transition area comprises a plurality of third pixel circuits and third signal lines, the third pixel circuits in the transition area are electrically connected with the second signal lines in the transition area, and at least part of the third pixel circuits in the transition area are electrically connected with the second sub-pixels in the light-transmitting functional area correspondingly through the transparent conductive electrodes.
In an implementation manner of the first aspect, the transition region further includes a plurality of second heat dissipation structures, and the second heat dissipation structures are disposed in the same layer as at least one of the at least two conductive film layers.
In one implementation manner of the first aspect, the density of the plurality of second heat dissipation structures is less than the density of the plurality of first heat dissipation structures.
In one implementation of the first aspect, the second heat dissipation structure has a width greater than a width of the first heat dissipation structure.
In one implementation manner of the first aspect, the edge of the light-transmitting functional region includes a third heat dissipation structure, and the third heat dissipation structure surrounds the light-transmitting functional region; the third heat dissipation structure and at least one of the at least two conductive film layers are arranged on the same layer, and the first heat dissipation structure is electrically connected with the third heat dissipation structure.
In one implementation manner of the first aspect, the display panel further includes a transition area, and the transition area further includes a plurality of second heat dissipation structures; the second heat dissipation structures are electrically connected with the third heat dissipation structures.
In one implementation manner of the first aspect, the density of the first heat dissipation structures gradually increases in a direction in which the normal display area points to the light transmissive functional area.
In one implementation manner of the first aspect, at least three second sub-pixels of different emission colors constitute an emission pixel; the display panel also comprises a plurality of auxiliary heat dissipation structures, and the auxiliary heat dissipation structures surround the second sub-pixels; the auxiliary heat dissipation structures corresponding to different second sub-pixels in the same light emitting pixel are electrically connected and are electrically connected with the first heat dissipation structure.
In one implementation manner of the first aspect, the at least two conductive film layers include a metal conductive film layer and a transparent trace conductive film layer.
In a second aspect, an embodiment of the present application provides a display device, including the display panel provided in the first aspect and an optical device, where the optical device is disposed at a position of the display device corresponding to the light-transmitting functional region.
In one implementation of the second aspect, the optical device is at least one of an optical fingerprint sensor, an iris recognition sensor, a camera.
The technical scheme that this application embodiment provided has set up first heat radiation structure in printing opacity functional area, and first heat radiation structure is as the main heat dissipation part in the printing opacity functional area, and the first signal line in conventional display area is as main heat dissipation part for the radiating effect in printing opacity functional area and conventional display area is unanimous basically, and then can improve the demonstration difference problem that leads to because of the temperature difference between printing opacity functional area and the conventional display area. In addition, because the first heat dissipation structure in the display panel and the at least one conductive film layer inherent in the display panel are arranged in the same layer, that is, the first heat dissipation structure is formed at the same time when the conductive structure of the display panel is prepared, an additional preparation process is not needed, the realization is easy, and the thickness of the display panel is not increased.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic view of a display panel according to an embodiment of the present disclosure;
fig. 2 is a schematic view of another display panel provided in an embodiment of the present application;
FIG. 3 is an enlarged view of a portion of area AA in FIG. 1;
FIG. 4 is another enlarged partial view of the area AA in FIG. 1;
FIG. 5 is a partial cross-sectional view of the display panel shown in FIG. 3;
FIG. 6 is a partial cross-sectional view of the display panel shown in FIG. 4;
fig. 7 is a schematic diagram illustrating a relationship between a heat dissipation structure and a second sub-pixel in a display panel according to an embodiment of the present disclosure;
fig. 8 is a schematic view illustrating a relationship between a heat dissipation structure and a second sub-pixel in another display panel according to an embodiment of the disclosure;
fig. 9 is a schematic plan view illustrating a heat dissipation structure in a display panel according to an embodiment of the present disclosure;
fig. 10 is a schematic plan view illustrating a heat dissipation structure in another display panel according to an embodiment of the present disclosure;
fig. 11 is a cross-sectional view of a display panel in the vicinity of a light-transmitting functional region according to an embodiment of the present application;
FIG. 12 is a schematic plan view of FIG. 11;
fig. 13 is a schematic view of a display device according to an embodiment of the present disclosure.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present application, the following detailed descriptions of the embodiments of the present application are provided with reference to the accompanying drawings.
It should be understood that the embodiments described are only a few embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
In the description herein, it is to be understood that the terms "substantially", "approximately", "about", "substantially", and the like, as used in the claims and the examples herein, are intended to be generally accepted as not being precise, within the scope of reasonable process operation or tolerance.
It is to be understood that although the terms first, second, third, and the like may be employed in the embodiments of the present application to describe signal lines, pixel circuits, and the like, these signal lines, pixel circuits, and the like should not be limited to these terms. These terms are only used to distinguish the signal lines, the pixel circuits from each other. For example, a first signal line may also be referred to as a second signal line, and similarly, a second signal line may also be referred to as a first signal line, without departing from the scope of embodiments of the present application.
The applicant provides a solution to the problems of the prior art through intensive research.
The embodiment of the application provides a display panel and a display device.
Fig. 1 is a schematic view of a display panel according to an embodiment of the present disclosure, fig. 2 is a schematic view of another display panel according to an embodiment of the present disclosure, fig. 3 is a partially enlarged view of an AA area in fig. 1, fig. 4 is another partially enlarged view of the AA area in fig. 1, fig. 5 is a partially cross-sectional view of the display panel shown in fig. 3, and fig. 6 is a partially cross-sectional view of the display panel shown in fig. 4. It should be noted that the specific structure of the AA region illustrated in fig. 3 and 4 may be substantially the same as the specific structure in the vicinity of the light-transmitting functional region in fig. 2.
As shown in fig. 1 and fig. 2, the display panel provided in the embodiment of the present application includes a normal display area 01 and a light-transmitting functional area 02, where the normal display area 01 at least partially surrounds the light-transmitting functional area 02. As shown in fig. 1, the light-transmitting functional region 02 may be completely surrounded by the conventional display region 01; as shown in fig. 2, the light-transmitting functional region 02 may also be partially surrounded by the normal display region 01.
As shown in fig. 3 and 4, a plurality of first subpixels PX1 capable of emitting light are disposed in the normal display area 01 for performing main light-emitting display. A plurality of second sub-pixels PX2 capable of emitting light are disposed in the light-transmitting functional region 02, and an area of the display panel corresponding to the light-transmitting functional region 02 can transmit external light outside the display panel, and the light-transmitting functional region 02 can also be used for light-emitting display.
The light transmittance of the region where the light-transmitting functional region 02 is located is greater than that of the region where the conventional display region 01 is located, that is, the light transmittance of the region where the light-transmitting functional region 02 allows external light outside the display panel to pass through is greater than that of the region where the conventional display region 01 is located allows external light outside the display panel to pass through. The light-transmitting functional region 02 can realize at least one of functions such as photographing, biometric recognition, and illumination, in addition to the light-emitting display.
The light-transmitting functional region 02 is at least partially surrounded by the normal display region 01, that is, the light-transmitting functional region 02 is arranged in the normal display region 01, so that the light-transmitting functional region 02 is prevented from being arranged in a non-display region at the periphery of the normal display region 01 to increase the frame width of the display panel.
It should be noted that, the light-transmitting functional region 02 may have an elliptical structure as shown in fig. 1 to fig. 4, or may have a circular structure or a rectangular structure, and the specific shape of the light-transmitting functional region 02 is not limited in the present application.
In order to realize that the light transmittance of the light-transmitting functional region 02 is greater than that of the conventional display region 01, the density of the light-shielding structure in the light-transmitting functional region 02 should be less than that of the light-shielding structure in the conventional display region 01, and then the density of the pixel circuit and/or the metal wire in the light-transmitting functional region 02 is less than that of the pixel circuit and/or the metal wire in the conventional display region 01, even no pixel circuit or metal wire is arranged in the light-transmitting functional region 02.
In one implementation manner of the present embodiment, as shown in fig. 3 and fig. 5, the conventional display area 01 includes a plurality of first pixel circuits DI1 and first signal lines L1, and the transparent functional area 02 includes a plurality of second pixel circuits DI2 and second signal lines L2. The density of the second signal lines L2 in the transparent functional area 02 is less than the density of the first signal lines L1 in the conventional display area 01.
As shown in fig. 3 and 5, the first pixel circuit DI1 in the conventional display area 01 is electrically connected to at least one first sub-pixel PX1 in the conventional display area 01, and is used for providing a current or a voltage required for light emission to the corresponding first sub-pixel PX 1. As shown in fig. 3 and 5, one first pixel circuit DI1 is electrically connected to one first sub-pixel PX 1; in addition, one first pixel circuit DI1 may also be electrically connected to a plurality of first sub-pixels PX1 correspondingly.
The first pixel circuit DI1 is electrically connected to the first signal line L1, and the first signal line L1 may be electrically connected to a gate and/or a source of at least one transistor in the first pixel circuit DI1, for providing a control signal and/or a display data signal to the first pixel circuit DI 1.
The second pixel circuit DI2 in the light-transmitting functional region 02 is electrically connected to at least one second sub-pixel PX2 in the light-transmitting functional region 02, and is configured to provide a current or a voltage required for light emission to the corresponding second sub-pixel PX 2. As shown in fig. 3 and 5, one second pixel circuit DI2 is electrically connected to one second sub-pixel PX 2; in addition, one second pixel circuit DI2 may also be electrically connected to a plurality of second sub-pixels PX2 correspondingly.
The second pixel circuit DI2 is electrically connected to the second signal line L2, and the second signal line L2 may be electrically connected to a gate and/or a source of at least one transistor in the second pixel circuit DI2, for providing a control signal and/or a display data signal to the second pixel circuit DI 2.
It should be noted that the first signal line L1 and the second signal line L2, which respectively provide signals for the first pixel circuit DI1 and the second pixel circuit DI2, are metal traces.
In the present embodiment, since the second sub-pixel PX2, the second pixel circuit DI2, and the second signal line L2 are provided in the light transmitting functional region 02, in order to realize that the light transmittance of the light transmitting functional region 02 is larger than that of the normal display region 01, the density of the second sub-pixels PX2 in the light transmitting functional region 02 may be set to be smaller than that of the first sub-pixels PX1 in the normal display region 01. Correspondingly, the density of the second pixel circuits DI2 in the light-transmitting functional region 02 is less than that of the first pixel circuits DI1 in the conventional display region 01, and the density of the second signal lines L2 in the light-transmitting functional region 02 is less than that of the first signal lines L2 in the conventional display region 02. Since the first signal line L1, the second signal line L2, the first pixel circuit DI1 and the second pixel circuit DI2 are all light shielding structures, when the density of the second signal line L2 and the density of the second pixel circuit DI2 are respectively less than the density of the first signal line L1 and the density of the first pixel circuit DI1, the light transmittance of the light-transmitting functional region 02 is greater than that of the conventional display region 01.
In another implementation manner of the embodiment of the present application, as shown in fig. 4 and fig. 6, the display panel further includes a transition region 03, and the transition region 03 is located between the normal display region 01 and the light-transmitting functional region 02.
The conventional display area 01 includes a plurality of first pixel circuits DI1 therein, and the first pixel circuit DI1 in the conventional display area 01 is electrically connected to at least one first sub-pixel PX1 in the conventional display area 01 to provide a current or voltage required for light emission to the corresponding first sub-pixel PX 1. As shown in fig. 4 and 6, one first pixel circuit DI1 is electrically connected to one first sub-pixel PX 1; in addition, one first pixel circuit DI1 may also be electrically connected to a plurality of first sub-pixels PX1 correspondingly.
The transition area 03 includes a plurality of third pixel circuits DI3, a plurality of third sub-pixels PX3, and a third signal line L3. A portion of the third pixel circuit DI3 in the transition area 03 is electrically connected to at least one third sub-pixel PX3 in the transition area 03 correspondingly, and is used for providing a current or a voltage required for light emission for the corresponding third sub-pixel PX3, the third pixel circuit DI3 is electrically connected to the third signal line L3, and the third signal line L3 can be electrically connected to a gate and/or a source of at least one transistor in the third pixel circuit DI3 and is used for providing a control signal and/or a display data signal and the like for the third pixel circuit DI 3. As shown in fig. 4 and 6, one third pixel circuit DI3 is electrically connected to one third sub-pixel PX 3; in addition, one third pixel circuit DI3 may be electrically connected to a plurality of third sub-pixels PX3 correspondingly.
In addition, a portion of the third pixel circuit DI3 in the transition area 03 is electrically connected to at least one second sub-pixel PX2 in the light-transmitting functional area 02, respectively, for supplying a current or voltage required for light emission to the corresponding second sub-pixel PX 2. As shown in fig. 4 and 6, one third pixel circuit DI3 is electrically connected to one second sub-pixel PX 2; in addition, one third pixel circuit DI3 may be electrically connected to a plurality of second sub-pixels PX2 correspondingly. The third pixel circuit DI3 in the transition area 03, which is electrically connected to the second sub-pixel PX2 in the light-transmitting functional area 02, is electrically connected to at least one of the second sub-pixels PX2 through the transparent conductive electrode L4, specifically through the transparent conductive electrode L4.
That is, the plurality of third pixel circuits DI3 included in the transition area 03 includes a first-type third pixel circuit DI3a and a second-type third pixel circuit DI3b, wherein the first-type third pixel circuit DI3a is electrically connected to the third sub-pixel PX3, and the second-type third pixel circuit DI3b is electrically connected to the second sub-pixel PX 2. The pixel circuit that supplies the current or voltage necessary for light emission to the second subpixel PX2 in the light-transmitting functional region 02 is located in the transition region 03, and the pixel circuit that supplies the current or voltage necessary for light emission to the second subpixel PX2 and the signal line that supplies the signal to the pixel circuit are not provided in the light-transmitting functional region 02. The signal lines for providing signals for the pixel circuits are metal wiring lines, and because the pixel circuits and the signal lines for providing signals for the pixel circuits are both in a light shielding structure, when the pixel circuits and the signal lines for providing signals for the pixel circuits are not arranged in the light transmitting functional area 02, the light transmittance of the light transmitting functional area 02 is greater than that of the conventional display area 01.
In the embodiment of the present application, as shown in fig. 5 and 6, the display panel includes at least two conductive film layers along the thickness direction of the display panel.
With reference to fig. 5 and fig. 6, the transistor in the first pixel circuit DI1 includes a first gate 211, a first source 212, and a first drain 213, wherein the first gate 211, the first source 212, and the first drain 213 may be located in different conductive films, and specifically may be located in different metal films. Wherein the first gate electrode 211 and/or the first source electrode 212 may be electrically connected to the first signal line L1. With continued reference to fig. 5, the transistor in the second pixel circuit DI2 includes a second gate 221, a second source 222, and a second drain 223, wherein the second gate 221, the second source 222, and the second drain 223 may be disposed at the same layer as the first gate 211 and/or the first source 212, respectively. With reference to fig. 6, the transistor in the third pixel circuit DI3 includes a third gate 231, a third source 232, and a third drain 233, wherein the third gate 231, the third source 232, and the third drain 233 may also be disposed at the same layer as the first gate 211 and/or the first source 212, respectively.
With reference to fig. 5 and fig. 6, the first sub-pixel PX1 includes a first light emitting layer 111, a first anode 112 and a first cathode 113, wherein the first light emitting layer 111 is located between the first anode 112 and the first cathode 113, the first anode 112 is electrically connected to the first drain 213 included in one transistor of the first pixel circuit DI1, and the first light emitting layer 111 can be caused to emit light when a certain voltage difference exists between the first anode 112 and the first cathode 113. And one of the first anode 112 and the first cathode 113 is a metal electrode, and the other is a transparent electrode, for example, as illustrated in fig. 5 and 6, in a top emission display panel, the first anode 112 is a metal electrode.
With reference to fig. 5 and fig. 6, the second sub-pixel PX2 includes a second light-emitting layer 121, a second anode 122 and a second cathode 123, wherein the second light-emitting layer 121, the second anode 122 and the second cathode 123 are disposed at the same layer as the first light-emitting layer 111, the first anode 112 and the first cathode 113, respectively. When the second sub-pixel PX2 located in the light-transmitting functional region 02 is electrically connected to the second pixel circuit DI2 located in the light-transmitting functional region 02, the second anode electrode 122 is electrically connected to the second drain electrode 223.
With reference to fig. 6, the third sub-pixel PX3 includes a third light-emitting layer 131, a third anode 132 and a third cathode 133, wherein the third light-emitting layer 131, the third anode 132 and the third cathode 133 are disposed in the same layer as the first light-emitting layer 111, the first anode 112 and the first cathode 113, respectively. When the first-type third pixel circuit DI3a is electrically connected to the third sub-pixel PX3 and the second-type third pixel circuit DI3b is electrically connected to the second sub-pixel PX2, the third anode 132 is electrically connected to the third anode 132 of the first-type third pixel circuit DI3a, and the second anode 122 is electrically connected to the third anode 132 of the second-type third pixel circuit DI3 b.
In addition, as shown in fig. 5 and fig. 6, the display panel may further include a touch layer, and the touch layer includes touch electrodes and touch traces 30.
Along the thickness direction of the display panel, the display panel includes a conductive film layer including the first gate 211/the second gate 221/the third gate 231, a conductive film layer including the first source 212/the first drain 213/the second source 222/the second drain 223/the third source 232/the third drain 233, a conductive film layer including the first anode 112/the second anode 122/the third anode 132, a conductive film layer including the first cathode 113/the second cathode 123/the third cathode 133, a conductive film layer including the touch electrode, and a conductive film layer including the touch trace 30.
In an embodiment of the present application, the light-transmitting functional region 02 of the display panel further includes a plurality of first heat dissipation structures 40, and the first heat dissipation structures 40 are disposed in the same layer as at least one of the at least two conductive film layers, that is, the first heat dissipation structures 40 may be disposed in the same layer as at least one of the conductive film layers including the first gate 211, the second gate 221, and the third gate 231, the conductive film layers including the first source 212, the first drain 213, the second source 222, the second drain 223, the third source 232, and the third drain 233, the conductive film layers including the first anode 112, the second anode 122, and the third anode 132, the conductive film layers including the first cathode 113, the second cathode 123, and the third cathode 133, the conductive film layers including the touch electrode, and the conductive film layers including the touch trace 30.
The technical scheme that this application embodiment provided has set up first heat radiation structure 40 in printing opacity functional area 02, then first heat radiation structure 40 is as the main heat dissipation part in printing opacity functional area 02, and the first signal line L1 of conventional display area 01 is as main heat dissipation part for printing opacity functional area 02 is unanimous basically with the radiating effect of conventional display area 01, and then can improve the demonstration difference problem that leads to because of the temperature difference between printing opacity functional area 02 and the conventional display area 01. In addition, since the first heat dissipation structure 40 in the display panel and the at least one conductive film layer inherent in the display panel are arranged in the same layer, that is, the first heat dissipation structure 40 is formed at the same time when the conductive structure of the display panel is prepared, an additional preparation process is not required, the implementation is easy, and the thickness of the display panel is not increased.
Further, the first heat dissipation structure 40 is disposed on the same layer as at least one metal film layer, for example, the first heat dissipation structure 40 may be disposed on the same layer as at least one of the conductive film layer including the first gate 211, the second gate 221, and the third gate 231, the conductive film layer including the first source 212, the first drain 213, the second source 222, the second drain 223, the third source 232, and the third drain 233, the conductive film layer including the first anode 112, the second anode 122, and the third anode 132, and the conductive film layer including the touch trace 30.
Because the metal has a good heat conduction characteristic, at least one film layer in the first heat dissipation structure 40 is made of a metal material, so that a better heat dissipation effect can be achieved.
Furthermore, the film layer where the first heat dissipation structure 40 is located is close to the film layer where the second light emitting layer 121 is located, for example, the first heat dissipation structure 40 may be disposed at the same layer as the second anode 122, or may be disposed at the same layer as the touch trace 30, where the touch trace 30 is located at one side of the touch layer close to the second light emitting layer 121.
The inventor finds that the main reason why the light-transmitting functional region 02 is abnormal in the prior art is that heat generated in the light-transmitting functional region 02 during the display process cannot be timely conducted out, so that the material characteristics in the light-emitting layer are changed and the display abnormality occurs. By disposing at least one film layer of the first heat dissipation structure 40 to be the same layer as the second anode 122 or the touch trace 30 close to the second light emitting layer 121, heat near the second light emitting layer 121 can be conducted out better and quickly, and the influence of heat accumulation on the light emitting characteristics of the second light emitting layer 121 is avoided.
In one embodiment of the present application, at least three second sub-pixels of different emission colors constitute an emission pixel; along the thickness direction of the display panel, the light-emitting pixels are at least partially overlapped with the first heat dissipation structure.
Fig. 7 is a schematic view illustrating a relationship between a heat dissipation structure and a second sub-pixel in a display panel according to an embodiment of the present disclosure, and fig. 8 is a schematic view illustrating a relationship between a heat dissipation structure and a second sub-pixel in another display panel according to an embodiment of the present disclosure.
In one embodiment of the present application, as shown in fig. 7 and 8, at least three second sub-pixels PX2 with different light-emitting colors in the light-transmitting functional area 02 constitute a light-emitting pixel PX, wherein the three second sub-pixels PX2 with different light-emitting colors may be a red second sub-pixel, a blue second sub-pixel and a green second sub-pixel, respectively. As shown in fig. 7 and 8, the display panel further includes a plurality of auxiliary heat dissipation structures 40 ', the auxiliary heat dissipation structures 40 ' surround the second sub-pixel PX2, and the auxiliary heat dissipation structures 40 ' corresponding to at least three different sub-pixels PX2 in the same light-emitting pixel PX are electrically connected and electrically connected to the first heat dissipation structure 40. That is, the auxiliary heat dissipation structure 40 'is disposed around the region where each of the second sub-pixels PX2 is located, and the auxiliary structure 40' is electrically connected to the first heat dissipation structure 40.
Since the auxiliary heat dissipation structure 40 'surrounding the area where each second sub-pixel PX2 is located is disposed around the area, and the auxiliary heat dissipation structure 40' is electrically connected to the first heat dissipation structure, the heat in the area where each second sub-pixel PX2 is located can be rapidly and effectively dissipated; moreover, the auxiliary heat dissipation structures 40' corresponding to the plurality of second sub-pixels PX2 belonging to the same light-emitting pixel PX are electrically connected, so that the temperature uniformity of the plurality of second sub-pixels PX2 in the light-emitting pixel PX in the light-transmitting functional region 02 is good, and the white balance effect is better; in addition, the auxiliary heat dissipation structure 40' is disposed around each of the second sub-pixels PX2, so that it is possible to ensure uniform optical performance around each of the second sub-pixels PX 2.
It should be noted that the auxiliary heat dissipation structure 40' may be disposed on the same layer as at least two conductive film layers in the display panel. Further, the auxiliary heat dissipation structure 40' may be disposed in the same layer as the first heat dissipation structure 40.
In one implementation manner of the present embodiment, as shown in fig. 7, the first heat dissipation structures 40 are uniformly distributed in the light transmissive functional region 02.
In another implementation manner of the present embodiment, as shown in fig. 8, in a direction in which the normal display area 01 points to the light transmissive function area 02, the density of the first heat dissipation structures 40 gradually increases, that is, the density of the first heat dissipation structures 40 is smaller as the first heat dissipation structures 40 are closer to the normal display area 01.
As shown in fig. 8, the first heat dissipation structures 40 in the light-transmitting functional region 02 may include a first type of first heat dissipation structure 40a and a second type of first heat dissipation structure 40b, wherein the first type of first heat dissipation structure 40a is the first heat dissipation structure 40 directly connected with the auxiliary heat dissipation structure 40 ', and the second type of first heat dissipation structure 40b is the first heat dissipation structure 40 not connected with the auxiliary heat dissipation structure 40', wherein the first type of first heat dissipation structure 40a may be uniformly distributed in the light-transmitting functional region 02, and the density of the second type of first heat dissipation structure 40b is smaller as it is closer to the conventional display region 01.
Since the region farther from the normal display region 01 in the light-transmitting functional region 02 is farther from the first signal line L1 in the normal display region 01, the heat dissipation effect of the second light-emitting layer 121 disposed in the region farther from the normal display region 01 in the light-transmitting functional region is poorer, and the present embodiment equalizes the heat dissipation effects of different regions of the light-transmitting functional region 02 by setting the density of the first heat dissipation structures 40 closer to the central region of the light-transmitting functional region 02 to be larger and the density of the first heat dissipation structures 40 closer to the normal display region 01 to be smaller.
Fig. 9 is a schematic plan view illustrating a heat dissipation structure in a display panel according to an embodiment of the present disclosure.
In an embodiment of the present application, as shown in fig. 9, an edge of the light transmissive functional region 02 includes a third heat dissipation structure 50, and the third heat dissipation structure 50 is disposed in the same layer as at least one of at least two conductive film layers included in the display panel. That is, the third heat dissipation structure 50 may be disposed in the same layer as at least one of the conductive film layer including the first gate 211/the second gate 221/the third gate 231, the conductive film layer including the first source 212/the first drain 213/the second source 222/the second drain 223/the third source 232/the third drain 233, the conductive film layer including the first anode 112/the second anode 122/the third anode 132, the conductive film layer including the first cathode 113/the second cathode 123/the third cathode 133, the conductive film layer including the touch electrode, and the conductive film layer including the touch trace 30.
In one implementation manner of the present embodiment, the third heat dissipation structure 50 may be disposed on the same layer as the first heat dissipation structure 40.
Referring to fig. 9, in the present embodiment, the third heat dissipation structure 50 surrounds the light transmissive functional region 02, and the first heat dissipation structures 40 disposed in the light transmissive functional region 02 are electrically connected to the third heat dissipation structure 50. On one hand, the heat in the light-transmitting functional region 02 can be conducted to the outer edge of the light-transmitting functional region 02 through the electrically connected first heat dissipation structure 40 and third heat dissipation structure 50, so that the phenomenon that the display of the main area of the light-transmitting functional region 02 is influenced by the aggregation of the areas, close to the center, of the light-transmitting functional region 02 is avoided; on the other hand, the first heat dissipation structures 40 in the light-transmitting functional region 02 are all electrically connected to the third heat dissipation structures 50, and then all the first heat dissipation structures 40 in the light-transmitting functional region 02 are also electrically connected, so that the temperatures of the first heat dissipation structures distributed in the whole light-transmitting functional region 02 can be equal, the temperature uniformity of the whole light-transmitting functional region 02 is realized, and further the display brightness of the whole region of the light-transmitting functional region 02 is uniform.
In addition, as shown in fig. 7 to 9, in the display panel provided in the embodiment of the present application, the first heat dissipation structure 40 disposed on the same layer as at least one conductive film layer in the display panel is in a curve shape, that is, a projection of the first heat dissipation structure 40 along the thickness direction of the display panel is in a curve shape, and the first heat dissipation structure 40 may be electrically insulated from both signal lines of the display panel for transmitting signals and electrical structures for displaying. In the embodiment of the present application, the first heat dissipation structure 40 is a curved structure, which can effectively reduce the light diffraction phenomenon at the position of the light transmission functional region 02, and ensure the accuracy of optical image acquisition at the position of the light transmission functional region 02.
Fig. 10 is a schematic plan view of another heat dissipation structure in a display panel according to an embodiment of the present disclosure.
As shown in fig. 10, when the display panel further includes a transition region 03, a second heat dissipation structure 60 is disposed in the transition region 03, and the second heat dissipation structure 60 is disposed on the same layer as at least one of at least two conductive film layers included in the display panel. The specific film layers of the second heat dissipation structure 60 may be the same as the first heat dissipation structure 40, and are not described herein again.
With reference to fig. 10, the density of the second heat dissipation structures 60 in the transition region 03 is less than the density of the first heat dissipation structures 40 in the light-transmitting functional region 02. The transition region 03 has a third signal line L3 capable of dissipating heat relative to the light-transmitting functional region 02, and when an additional heat dissipation structure is disposed in the transition region 03, the density of the additional heat dissipation structure may be less than that of the first heat dissipation structure 40 in the light-transmitting functional region 02.
Further, as shown in fig. 10, the width of the second heat dissipation structure 60 may be set to be greater than the width of the first heat dissipation structure 40. Because the light transmittance of the transition region 03 to the external light is less than the light transmittance of the light-transmitting functional region 02 to the external light, the width of the second heat dissipation structure 60 is set to be larger, so that the second heat dissipation structure 60 can be ensured to have a good heat dissipation effect while less second heat dissipation structures 60 are arranged, and more space is provided for arranging the third pixel circuit DI3, the plurality of third sub-pixels PX3 and the third signal line L3.
In an implementation manner of this embodiment, as shown in fig. 10, when the display panel includes the transition area 03 and the second heat dissipation structure 60 is disposed therein, and the third heat dissipation structure 50 is disposed in the light-transmitting functional area 02, the second heat dissipation structures 60 may also be electrically connected to the third heat dissipation structure 50, so as to ensure temperature uniformity at various places in the transition area 03, thereby making uniformity of brightness at various places in the transition area 03 and uniformity of brightness with the light-transmitting functional area 01.
Fig. 11 is a cross-sectional view of a display panel in the vicinity of a light-transmitting functional region according to an embodiment of the present application, and fig. 12 is a schematic plan view corresponding to fig. 11.
In one embodiment of the present application, the first heat dissipation structure 40 may be disposed on the same layer with only one conductive film layer in the display panel.
In another embodiment of the present application, as shown in fig. 11 and 12, the first heat dissipation structure 40 may be disposed on the same layer as the plurality of conductive film layers in the display panel, for example, on the same layer as two conductive film layers.
In one implementation manner of the embodiment, at least two conductive film layers in the display panel include a metal conductive film layer and a transparent trace conductive film layer. The metal conductive film layer may be one of a conductive film layer including the first gate 211, the second gate 221, and the third gate 231, a conductive film layer including the first source 212, the first drain 213, the second source 222, the second drain 223, the third source 232, and the third drain 233, a conductive film layer including the first anode 112, the second anode 122, and the third anode 132, and a conductive film layer including the touch trace 30; the transparent trace conductive film layer may include one of a conductive film layer including the first cathode 113/the second cathode 123/the third cathode 133, a conductive film layer including a touch electrode, and the like.
As shown in fig. 11 and 12, the first heat dissipation structure 40 includes a first portion 40a disposed on the same layer as the metal conductive film layer and a second portion 40b disposed on the same layer as the transparent trace conductive film layer. The first heat dissipation structure 40 provides two heat dissipation channels for the second light emitting layer 121, so that heat can be dissipated quickly.
Further, the first portion 40a of the first heat dissipation structure 40 may be disposed at the same layer as the second anode 122, and the second portion 40b may be disposed at the same layer as the second cathode 123. Since the second anode 122 and the second cathode 123 are respectively located at two sides of the second light-emitting layer 121, and the film layer where the second anode 122 and the second cathode 123 are located is closer to the film layer where the second light-emitting layer 121 is located than other conductive film layers, the first heat dissipation structure 40 can dissipate heat quickly.
Fig. 13 is a schematic view of a display device according to an embodiment of the present disclosure, and as shown in fig. 13, the display device includes a display panel 001 according to any one of the embodiments. The display device provided by the embodiment of the application can be a mobile phone, and in addition, the display device provided by the embodiment of the application can also be a computer, a television and other display devices.
As shown in fig. 13, the display device provided in the embodiment of the present application further includes an optical device 002, and the optical device 002 is disposed at a position of the display device corresponding to the light-transmitting functional region 02 of the display panel 001. That is, the optical device 002 is disposed below the light transmitting functional region 02 of the display panel 001 in the thickness direction of the display panel 001. The optical device 002 can emit light to the light emitting surface side of the display panel 001 through the light transmitting functional region 02, or can receive light from the light emitting surface side of the display panel 001 through the light transmitting functional region 02. Wherein, the optical device 002 is at least one of an optical fingerprint sensor, an iris recognition sensor, a camera and a flashlight.
In this embodiment of the application, the first heat dissipation structure 40 is disposed at a position of the display device corresponding to the light-transmitting functional region 02, and then the first heat dissipation structure 40 in the light-transmitting functional region 02 is used as a main heat dissipation component, and the first signal line L1 of the conventional display region 02 is used as a main heat dissipation component, so that the heat dissipation effects of the light-transmitting functional region 02 and the conventional display region 01 are substantially the same, and the display difference problem caused by the temperature difference between the light-transmitting functional region 02 and the conventional display region 01 can be further improved. In addition, since the first heat dissipation structure 40 in the display device provided by the embodiment of the present application and the at least one conductive film layer in the display panel are disposed on the same layer, and no additional structure is required, the display device is easy to implement and the thickness of the display device is not increased.
The above description is only a preferred embodiment of the present application and should not be taken as limiting the present application, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (12)
1. A display panel, comprising:
a regular display area, wherein a plurality of first sub-pixels are arranged in the regular display area;
a light transmissive functional region, said regular display region at least partially surrounding said light transmissive functional region; a plurality of second sub-pixels are arranged in the light-transmitting functional area;
the light transmittance of the light-transmitting functional area in the display panel is greater than that of the conventional display area;
the display panel comprises at least two conductive film layers along the thickness direction of the display panel; the light-transmitting functional region further comprises a plurality of first heat dissipation structures, and the first heat dissipation structures and at least one of the at least two conductive film layers are arranged on the same layer;
the display panel further comprises a transition area, and the transition area is positioned between the conventional display area and the light-transmitting functional area;
the edge of the light-transmitting functional area comprises a third heat dissipation structure, and the third heat dissipation structure surrounds the light-transmitting functional area; the third heat dissipation structure and at least one of the at least two conductive film layers are arranged on the same layer;
the first heat dissipation structures are electrically connected with the third heat dissipation structures; and/or the transition region further comprises a plurality of second heat dissipation structures, and the second heat dissipation structures are electrically connected with the third heat dissipation structures.
2. The display panel according to claim 1, wherein the heat dissipation structure is curved.
3. The display panel according to claim 1, wherein the normal display region includes a plurality of first pixel circuits and a plurality of first signal lines; the first pixel circuit in the normal display area is correspondingly and electrically connected with the first sub-pixel in the normal display area and is electrically connected with the first signal line in the normal display area;
the light-transmitting functional area comprises a plurality of second pixel circuits and a plurality of second signal lines; the second pixel circuit in the light-transmitting functional area is correspondingly and electrically connected with the second sub-pixel in the light-transmitting functional area and is electrically connected with the second signal line in the light-transmitting functional area;
the density of the second pixel circuits in the light-transmitting functional region is smaller than that of the first pixel circuits in the normal display region, and the density of the second signal lines is smaller than that of the first signal lines.
4. The display panel according to claim 1, wherein the normal display region includes a plurality of first pixel circuits and first signal lines, the first pixel circuits in the normal display region are electrically connected to the first sub-pixels in the normal display region, and are electrically connected to the first signal lines in the normal display region;
the transition region comprises a plurality of third pixel circuits and third signal lines, the third pixel circuits in the transition region are electrically connected with the third signal lines in the transition region, and at least part of the third pixel circuits in the transition region are electrically connected with the second sub-pixels in the light-transmitting functional region correspondingly through transparent conductive electrodes.
5. The display panel of claim 4, wherein the second heat dissipation structure is disposed on the same layer as at least one of the at least two conductive film layers.
6. The display panel according to claim 5, wherein the density of the plurality of second heat dissipation structures is less than the density of the plurality of first heat dissipation structures.
7. The display panel according to claim 5, wherein the width of the second heat dissipation structure is greater than the width of the first heat dissipation structure.
8. The display panel according to claim 1, wherein the density of the first heat dissipation structures gradually increases in a direction in which the normal display area points to the light transmissive functional area.
9. The display panel according to claim 1, wherein the second sub-pixels of at least three different emission colors constitute an emission pixel;
the display panel further comprises a plurality of auxiliary heat dissipation structures, and the auxiliary heat dissipation structures surround the second sub-pixels; the auxiliary heat dissipation structures corresponding to different second sub-pixels in the same light emitting pixel are electrically connected and are electrically connected with the first heat dissipation structure.
10. The display panel of claim 1, wherein the at least two conductive film layers comprise a metal conductive film layer and a transparent trace conductive film layer.
11. A display device, comprising the display panel according to any one of claims 1 to 10 and an optical device, wherein the optical device is disposed at a position of the display device corresponding to the light-transmitting functional region.
12. The display device of claim 11, wherein the optical device is at least one of an optical fingerprint sensor, an iris recognition sensor, and a camera.
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| CN202211095190.0A CN115565451A (en) | 2020-11-30 | 2020-11-30 | Display panel and display device |
| CN202011384447.5A CN112435586B (en) | 2020-11-30 | 2020-11-30 | Display panel and display device |
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| CN113093422B (en) * | 2021-03-23 | 2022-12-23 | 深圳市华星光电半导体显示技术有限公司 | Display panel and preparation method thereof |
| CN112928149A (en) * | 2021-04-02 | 2021-06-08 | 维沃移动通信有限公司 | Display panel and electronic device |
| WO2023000134A1 (en) * | 2021-07-19 | 2023-01-26 | 京东方科技集团股份有限公司 | Display panel and display apparatus |
| CN113809112B (en) * | 2021-08-06 | 2024-09-03 | 武汉天马微电子有限公司 | Display panel and display device |
| CN113838413B (en) * | 2021-11-08 | 2023-07-21 | 武汉天马微电子有限公司 | Display panel and display device |
| CN114281206A (en) * | 2021-12-14 | 2022-04-05 | 武汉华星光电半导体显示技术有限公司 | Display panel and mobile terminal |
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