CN114895491A - Display panel and display device - Google Patents

Display panel and display device Download PDF

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Publication number
CN114895491A
CN114895491A CN202210645940.0A CN202210645940A CN114895491A CN 114895491 A CN114895491 A CN 114895491A CN 202210645940 A CN202210645940 A CN 202210645940A CN 114895491 A CN114895491 A CN 114895491A
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China
Prior art keywords
heating circuit
display panel
data signal
circuit
heating
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Granted
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CN202210645940.0A
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Chinese (zh)
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CN114895491B (en
Inventor
邹宗骏
孙莹
许育民
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Xiamen Tianma Microelectronics Co Ltd
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Xiamen Tianma Microelectronics Co Ltd
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Priority to CN202210645940.0A priority Critical patent/CN114895491B/en
Publication of CN114895491A publication Critical patent/CN114895491A/en
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133382—Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133334—Electromagnetic shields
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/84—Passivation; Containers; Encapsulations
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/87—Arrangements for heating or cooling

Abstract

The invention discloses a display panel and a display device. The display panel comprises a display panel, a first heating circuit and a second heating circuit, wherein the first heating circuit and the second heating circuit are mutually laminated and mutually insulated in the light emitting direction of the display panel; the first heating circuit and the second heating circuit are positioned inside the display panel or adjacent to the display panel, and the vertical projections of the first heating circuit and the second heating circuit on the plane of the display panel are at least partially overlapped with the display panel; the first heating circuit and the second heating circuit are mutually overlapped in the vertical projection of the plane where the display panel is positioned, and the electromagnetic fields of the first heating circuit and the second heating circuit are opposite in phase. Through the scheme, the ranges of the electromagnetic fields generated by the first heating circuit and the second heating circuit are close to each other and opposite in direction, so that the electromagnetic fields generated by the first heating circuit and the second heating circuit can be mutually offset, the interference of the electromagnetic fields of the heating circuits on other signals in the display panel is avoided, and the working stability of the display panel is improved.

Description

Display panel and display device
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
With the expansion of the application field of display devices, new requirements are put on the performance of display devices. For example, military or vehicle mounted displays require a long time to operate in a low temperature environment, but the low temperature can have a large impact on the response time of the display device. Therefore, in order to ensure the normal application of the display device in the special fields of military use or vehicle mounted display, measures are taken to widen the low temperature working range of the display device and ensure the working performance of the display device in the low temperature environment.
Disclosure of Invention
The invention provides a display panel and a display device, which are used for improving the display effect and the display performance of the display panel and the display device at low temperature.
In a first aspect, an embodiment of the present invention provides a display panel, including a display panel, a first heating circuit, and a second heating circuit, where the first heating circuit and the second heating circuit are stacked and insulated from each other in a light emitting direction of the display panel;
the first heating circuit and the second heating circuit are positioned in the display panel or adjacent to the display panel, and the vertical projections of the first heating circuit and the second heating circuit on the plane of the display panel at least partially overlap with the display panel;
the first heating circuit and the second heating circuit are mutually overlapped in the vertical projection of the plane where the display panel is located, and the electromagnetic fields of the first heating circuit and the second heating circuit are opposite in phase.
In a second aspect, an embodiment of the present invention further provides a display device, including the display panel according to the first aspect of the present invention.
The display panel comprises a display panel, a first heating circuit and a second heating circuit, wherein the first heating circuit and the second heating circuit are mutually laminated and mutually insulated in the light emitting direction of the display panel; the first heating circuit and the second heating circuit are positioned inside the display panel or adjacent to the display panel, and the vertical projections of the first heating circuit and the second heating circuit on the plane of the display panel are at least partially overlapped with the display panel; the first heating circuit and the second heating circuit are mutually overlapped in the vertical projection of the plane where the display panel is positioned, and the electromagnetic fields of the first heating circuit and the second heating circuit are opposite in phase. Through the technical scheme, when the first heating circuit and the second heating circuit transmit heating signals, the first electromagnetic field generated by the first heating circuit and the second electromagnetic field generated by the second heating circuit are close to each other in range, the magnetic field directions of the first electromagnetic field and the second electromagnetic field are opposite, and then the first electromagnetic field and the second electromagnetic field can be mutually offset, so that the interference of the first electromagnetic field and the second electromagnetic field on other signals in the display panel is avoided, and the working stability of the display panel is improved.
Drawings
FIG. 1 is a schematic diagram of a display panel in the prior art;
FIG. 2 is a schematic cross-sectional view taken along line A-A' of FIG. 1;
fig. 3 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view taken along line B-B' of FIG. 3;
FIG. 5 is a timing diagram of driving signals according to an embodiment of the present invention;
FIG. 6 is a timing diagram of another driving signal according to an embodiment of the present invention;
fig. 7 to 9 are schematic cross-sectional structures of three display panels according to an embodiment of the invention;
fig. 10 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
FIG. 11 is a schematic cross-sectional view taken along line C-C' of FIG. 10;
FIG. 12 is a timing diagram of another driving signal according to an embodiment of the present invention;
FIG. 13 is an enlarged schematic view of FIG. 10 at D;
fig. 14 is a schematic structural diagram of another display panel according to an embodiment of the invention;
FIG. 15 is an enlarged schematic view at E of FIG. 14;
fig. 16 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 17 is a schematic structural diagram of another display panel according to an embodiment of the invention;
fig. 18 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.
In order to meet the requirement of the display device for low temperature influence time, a heating circuit is additionally designed in the display panel of the conventional display device, and the heating circuit is mainly used for heating the display panel in a low temperature environment, so that the display device can achieve a higher response speed under the condition of ultralow temperature.
Fig. 1 is a schematic structural diagram of a display panel in the prior art, fig. 2 is a schematic structural diagram of a cross section along a-a 'direction in fig. 1, and a principle of heating the display panel by a heating circuit 1' can be briefly described as follows in conjunction with fig. 1 and fig. 2: a loop is formed between the heating circuit 1 ' and the driving chip (not shown in the figure), so that a certain current is formed in the heating circuit trace 10 ', an arrow on the heating circuit trace 10 ' shown in fig. 1 represents a transmission direction of the current, and the current forms a thermal power consumption through a resistance of the heating circuit trace, thereby generating a heating effect. However, the inventor finds that the added heating circuit 1 'is not completely a positive help, when the heating circuit 1' is powered on to generate heat, the driving signal passes through the heating circuit trace 10 'and radiates the relevant electromagnetic field outwards, and the electromagnetic field 3' radiated outwards by the heating circuit 1 'causes electromagnetic interference to signals in other driving circuits 42' in the display panel, which affects the working stability of the display device. In addition, for the liquid crystal display panel, the electromagnetic field 3 ' radiated by the heating circuit 1 ' to the outside also affects the inversion of the liquid crystal 0 '; moreover, since the heating circuit 1 ' is not arranged in a whole surface, the wiring directions of the heating circuits are different, the directions of the electromagnetic fields 3 ' radiated are also different, and the influence on the inversion of the liquid crystal 0 ' is also unbalanced, thereby causing the problem of uneven display of the display panel.
Based on the above drawbacks of the prior art, the present invention provides a display panel, including a display panel, a first heating circuit and a second heating circuit, which are stacked and insulated from each other in a light emitting direction of the display panel;
the first heating circuit and the second heating circuit are positioned inside the display panel or adjacent to the display panel, and the vertical projections of the first heating circuit and the second heating circuit on the plane of the display panel are at least partially overlapped with the display panel;
the first heating circuit and the second heating circuit are mutually overlapped in the vertical projection of the plane where the display panel is positioned, and the electromagnetic fields of the first heating circuit and the second heating circuit are opposite in phase.
Through the technical scheme, when the first heating circuit and the second heating circuit transmit heating signals, the first electromagnetic field generated by the first heating circuit and the second electromagnetic field generated by the second heating circuit are close to each other in range, the magnetic field directions of the first electromagnetic field and the second electromagnetic field are opposite, and then the first electromagnetic field and the second electromagnetic field can be mutually offset, so that the interference of the first electromagnetic field and the second electromagnetic field on other signals in the display panel is avoided, and the working stability of the display panel is improved.
The above is the core idea of the present invention, and the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative work belong to the protection scope of the present invention.
Fig. 3 is a schematic structural diagram of a display panel according to an embodiment of the present invention, and fig. 4 is a schematic structural diagram of a cross section of fig. 3 along a direction B-B', as shown in fig. 3 and fig. 4, the display panel according to the present invention includes a display panel 100, a first heating circuit 1 and a second heating circuit 2, where the first heating circuit 1 and the second heating circuit 2 are stacked and insulated from each other in a light emitting direction of the display panel 100; the first heating circuit 1 and the second heating circuit 2 are positioned inside the display panel 100 or adjacent to the display panel 100, and the vertical projections of the first heating circuit 1 and the second heating circuit 2 on the plane of the display panel 100 at least partially overlap with the display panel 100; the perpendicular projections of the first heating circuit 1 and the second heating circuit 2 on the plane of the display panel 100 are overlapped with each other, and the electromagnetic fields of the first heating circuit 1 and the second heating circuit 2 are in opposite phases.
Specifically, as shown in fig. 3 and 4, the display panel 100 includes the display panel 100, a first heating circuit 1 and a second heating circuit 2, wherein the first heating circuit 1 and the second heating circuit 2 are used to heat the display panel 100 in a low temperature environment. The first heating circuit 1 and the second heating circuit 2 are stacked and insulated from each other in the light emitting direction of the display panel 100, that is, the first heating circuit 1 and the second heating circuit 2 are respectively disposed in the light emitting direction of the display panel 100, and the first heating circuit 1 and the second heating circuit 2 are not connected to each other.
The relative positions of the first heating circuit 1, the second heating circuit 2 and the display panel 100 are not limited in the embodiments of the present invention, and the first heating circuit 1 and the second heating circuit 2 may be disposed inside the display panel 100 or disposed adjacent to the display panel 100. In addition, the perpendicular projections of the first heating circuit 1 and the second heating circuit 2 on the plane of the display panel 100 at least partially overlap with the display panel 100, that is, the orthographic projection of the first heating circuit 1 on the light-emitting surface of the display panel 100 is at least partially located in the area covered by the display panel 100, and similarly, the orthographic projection of the second heating circuit 2 on the light-emitting surface of the display panel 100 is at least partially located in the area covered by the display panel 100. This arrangement ensures the heating effect of the first heating circuit 1 and the second heating circuit 2 on the display panel 100 under low temperature conditions. In fig. 3 and 4, the first heating circuit 1 and the second heating circuit 2 are disposed inside the display panel 100, but the actual arrangement is not limited thereto.
Further, as shown in fig. 4, the orthogonal projections of the first heating circuit 1 and the second heating circuit 2 on the plane of the display panel 100 overlap each other, that is, there are areas where the orthogonal projections of the first heating circuit 1 and the second heating circuit 2 on the plane of the display panel 100 overlap each other. And the electromagnetic fields of the first heating circuit 1 and the second heating circuit 2 are in opposite phase, it can also be understood that the first electromagnetic field 31 formed by the first heating circuit 1 during operation and the second electromagnetic field 32 formed by the second heating circuit 2 during operation are in opposite directions. Under the arrangement mode, when the first heating circuit 1 and the second heating circuit 2 transmit heating signals, the first electromagnetic field 31 generated by the first heating circuit 1 and the second electromagnetic field 32 generated by the second heating circuit 2 are close to each other in range, the magnetic field directions of the first electromagnetic field 31 and the second electromagnetic field 32 are opposite, the first electromagnetic field 31 and the second electromagnetic field 32 can be mutually offset, the interference of the electromagnetic field of the heating circuit on other electric signals in the driving circuit layer 42 of the display panel 100 is avoided, and further the working stability of the display panel 100 is improved.
In addition, when the display panel 100 is a liquid crystal display panel, as shown in fig. 4, the first electromagnetic field 31 and the second electromagnetic field 32 cancel each other out, so that the influence of the electromagnetic field generated by the heating circuit in the prior art on the deflection of the liquid crystal 0 is also eliminated, and the display effect of the display panel 100 is improved.
However, how to set the electromagnetic fields of the first heating circuit 1 and the second heating circuit 2 in opposite phases, that is, the first electromagnetic field 31 and the second electromagnetic field 32 in opposite phases, the embodiment of the present invention is not limited, and those skilled in the art can set the electromagnetic fields according to actual situations.
For example, in the embodiment of the present invention, the driving signals, i.e., the heating signals, of the first heating circuit 1 and the second heating circuit 2 may be set to be different, so as to invert the electromagnetic fields generated by the two. Fig. 5 is a timing diagram of a driving signal according to an embodiment of the present invention, and fig. 6 is a timing diagram of another driving signal according to an embodiment of the present invention, as shown in fig. 5 and fig. 6, the driving signals of the first heating circuit 1 and the second heating circuit 2 may be both dc signals, and have the same amplitude and opposite polarities; alternatively, the driving signals of the first heating circuit 1 and the second heating circuit 2 are both ac signals and have opposite phases.
Specifically, referring to fig. 5, when the driving signals of the first heating circuit 1 and the second heating circuit 2 are both direct current signals, the first driving signal 11 of the first heating circuit 1 and the second driving signal 21 of the second heating circuit 2 may be set to have the same amplitude and opposite polarities. For example, when the first driving signal 11 is V1, the second driving signal 21 is-V1, thereby causing the first heating circuit 1 and the second heating circuit 2 to generate electromagnetic fields in opposite phases.
Alternatively, referring to fig. 6, when the driving signals of the first and second heating circuits 1 and 2 are both ac signals, the phases of the first driving signal 11 of the first heating circuit 1 and the second driving signal 21 of the second heating circuit 2 may be set to be opposite. For example, the first drive signal 11 is a square wave pulse signal varying between V1 and 0, and the second drive signal 21 is a square wave pulse signal varying between-V1 and 0, thereby causing the first and second heating circuits 1 and 2 to generate electromagnetic fields in opposite phases.
Of course, the setting manners of the two driving signals are only specific embodiments of the electromagnetic field inversion of the optional first heating circuit 1 and the second heating circuit 2, and in the practical application process, a person skilled in the art may select other possible embodiments according to practical requirements, and any manner capable of achieving the electromagnetic field inversion of the first heating circuit 1 and the second heating circuit 2 is within the technical solution protected by the embodiment of the present invention.
The display panel comprises a display panel, a first heating circuit and a second heating circuit, wherein the first heating circuit and the second heating circuit are mutually laminated and mutually insulated in the light emitting direction of the display panel; the first heating circuit and the second heating circuit are positioned inside the display panel or adjacent to the display panel, and the vertical projections of the first heating circuit and the second heating circuit on the plane of the display panel are at least partially overlapped with the display panel; the first heating circuit and the second heating circuit are mutually overlapped in the vertical projection of the plane where the display panel is positioned, and the electromagnetic fields of the first heating circuit and the second heating circuit are opposite in phase. Through the technical scheme, when the first heating circuit and the second heating circuit transmit heating signals, the first electromagnetic field generated by the first heating circuit and the second electromagnetic field generated by the second heating circuit are close to each other in range, the magnetic field directions of the first electromagnetic field and the second electromagnetic field are opposite, so that the first electromagnetic field and the second electromagnetic field can be offset, the interference of the first electromagnetic field and the second electromagnetic field on other signals in the display panel is avoided, and the working stability of the display panel is improved.
When the first heating circuit and the second heating circuit are disposed inside the display panel, a person skilled in the art can set the arrangement mode and the arrangement position of the first heating circuit and/or the second heating circuit according to actual requirements. Several alternative embodiments of the arrangement of the first heating circuit and the second heating circuit are described below.
For example, fig. 7 to 9 are schematic cross-sectional structures of three display panels provided in an embodiment of the present invention, and with reference to fig. 7 to 9, in the present invention, a display panel 100 may include an array substrate 4, a display functional layer 5, and a color film substrate 6, where the array substrate 4, the display functional layer 5, and the color film substrate 6 are sequentially stacked in a light emergent direction of the display panel 100; the first heating circuit 1 and the second heating circuit 2 are both arranged in the array substrate 4 or the color filter substrate 6, or the first heating circuit 1 and the second heating circuit 2 are respectively arranged in the array substrate 4 and the color filter substrate 6.
Specifically, the display panel 100 may include an array substrate 4, a display functional layer 5, and a color filter substrate 6 sequentially stacked in a light emitting direction. The array substrate 4 may include a first substrate 41 and a driving circuit layer 42 formed on a surface of one side of the first substrate 41 close to the display function layer 5, where the driving circuit layer 42 is used for driving the display function layer 5 to emit light or selectively emit light; the display function layer 5 may be an organic light emitting function layer or a liquid crystal layer, when the display function layer 5 is an organic light emitting function layer, the driving circuit layer 42 is configured to drive the organic light emitting function layer to emit light, and when the display function layer 5 is a liquid crystal layer, the driving circuit layer 42 generates a driving signal, and the driving signal generates a driving electric field to act on the liquid crystal layer, so as to deflect liquid crystal molecules, thereby enabling the backlight to transmit light; the color filter substrate 6 may include a second substrate 61 and a color filter layer (not shown in the figure) disposed on the second substrate 61 and far from the display functional layer 5, and light in the display functional layer 5 passes through the color filter layer to show different colors and gray scales, thereby realizing image display.
For the specific arrangement modes of the array substrate 4, the display function layer 5 and the color film substrate 6, the embodiments of the present invention are not limited, and those skilled in the art can adopt any arrangement mode in the prior art according to actual needs, which is not described herein in detail.
Alternatively, referring to fig. 7, in a possible embodiment, the first heating circuit 1 and the second heating circuit 2 may be both disposed in the array substrate 4, and particularly may be both disposed between the first substrate 41 and the driving circuit layer 42, in which case a first insulating layer 43 may be disposed between the first heating circuit 1 and the second heating circuit 2. Since the array substrate 4 is provided with the step region (not shown) for binding, and the first heating circuit 1 and the second heating circuit 2 are provided in the array substrate 4, the step region does not need to be additionally provided, and the manufacturing processes of the display panel 100 are reduced. Of course, the arrangement positions of the first heating circuit 1 and the second heating circuit 2 in the array substrate 4 are not limited thereto, and those skilled in the art can arrange them according to actual requirements.
Optionally, referring to fig. 8, in another possible embodiment, the first heating circuit 1 and the second heating circuit 2 may be both disposed in the color filter substrate 6, specifically, both may be disposed on a side surface of the color filter substrate 6 close to the display functional layer 5, and a second insulating layer 44 may be disposed between the first heating circuit 1 and the second heating circuit 2. In this arrangement, the first heating circuit 1 and the second heating circuit 2 are far away from the driving circuit layer 42 in the array substrate 4, and the interference between the first electromagnetic field and the second electromagnetic field is weak.
Alternatively, referring to fig. 9, in a further possible embodiment, the first heating circuit 1 and the second heating circuit 2 may be respectively disposed in the array substrate 4 and the color filter substrate 6, that is, the first heating circuit 1 and the second heating circuit 2 are respectively disposed on two sides of the display functional layer 5. In the exemplary arrangement of fig. 9, the first heating circuit 1 is located in the array substrate 4, and the second heating circuit 2 is located in the color filter substrate 6, but the actual arrangement is not limited thereto. The advantage of this arrangement is that no additional insulating layer is required to be arranged between the first heating circuit 1 and the second heating circuit 2, which can reduce the manufacturing process and the overall thickness of the display panel.
Alternatively, fig. 10 is a schematic structural diagram of another display panel according to an embodiment of the present invention, and fig. 11 is a schematic structural diagram of a cross section of fig. 10 along a direction C-C', and referring to fig. 10 and fig. 11, in this embodiment, the array substrate 4 may include a data signal line circuit 7, and the data signal line circuit 7 is multiplexed into the second heating circuit 2.
Specifically, as shown in fig. 10 and 11, the array substrate 4 further includes a data signal line circuit 7, the data signal line circuit 7 may be disposed in the driving circuit layer 42, and the data signal line circuit 7 may be configured to transmit a data signal to the display function layer 5 in a data signal phase. It is worth mentioning that in the present invention, the data signal line circuit 7 may be multiplexed into the second heating circuit 2. The multiplexing data signal line circuit 7 is the second heating circuit 2, and the second heating circuit 2 does not need to be additionally arranged, so that the manufacturing cost and the manufacturing flow of the display panel 100 are reduced.
When the data signal line circuit 7 is multiplexed as the second heating circuit 2, the vertical projections of the data signal line circuit 7 and the first heating circuit 1 on the plane of the display panel 100 are overlapped with each other, so that the electromagnetic fields generated by the two are cancelled out. In fig. 10 and 11, the first heating circuit 1 is exemplarily disposed in the array substrate 4, but the actual arrangement is not limited thereto, and the first heating circuit may be disposed in the color filter substrate 6.
In addition, when the color filter substrate 6 is provided with a color resistor (not shown) and a black matrix (not shown) surrounding the color resistor, the vertical projections of the first heater circuit 1 and the data signal line circuit 7 on the plane of the display panel 100 may be overlapped with the vertical projection of the black matrix on the plane of the display panel 100. It can be understood that the black matrix is generally disposed in the non-light-transmitting region of the display panel 100, and by adopting the above arrangement, the first heating circuit 1 and the data signal line circuit 7 do not affect the light-emitting effect of the display panel 100, thereby ensuring the display effect of the display panel 100. The color resistance and the black matrix color setting can refer to any prior art, and are not described in detail herein.
Alternatively, fig. 12 is a timing diagram of another driving signal according to an embodiment of the present invention, as shown in fig. 12, when the data signal line circuit 7 is multiplexed as the second heater circuit 2, the data signal line circuit 7 includes a data signal phase T1 and a heat signal phase T2, and the data signal phase T1 and the heat signal phase T2 do not overlap on a time axis; in the heating signal period T2, the data signal line circuit 7 is in anti-phase with the electromagnetic field of the first heating circuit 1.
Specifically, referring to fig. 12, in the process of driving the display panel 100 to emit light, the data signal line circuit 7 needs to supply the data signal 22 to the display function layer 5. In the present embodiment, when the data signal line circuit 7 is multiplexed as the second heater circuit 2, the data signal line circuit 7 is set to include the data signal phase T1 and the heat signal phase T2. Further, the data signal phase T1 and the heat signal phase T2 do not overlap on the time axis, that is, in the data signal phase T1, the driving chip transmits the data signal 22 through the data signal line circuit 7; in the heating signal period T2, the driving chip transmits the second driving signal 21 through the data signal line circuit 7 to heat the display panel 100. Thereby, it can be ensured that the transmission of the second drive signal 21 does not disturb the transmission of the data signal 22.
It is understood that, during the heating signal period T2, the driving chip transmits the second driving signal 21 to the data signal line circuit 7 and simultaneously transmits the first driving signal 11 to the first heating circuit 1. At this time, the electromagnetic fields of the data signal line circuit 7 and the first heating circuit 1 are in opposite phases to achieve mutual cancellation of the electromagnetic fields generated by the data signal line circuit 7 and the first heating circuit 1, thereby eliminating interference of the electromagnetic field generated by the first heating circuit 1.
The technical solutions in the above embodiments can be referred to realize the electromagnetic field inversion between the data signal line circuit 7 and the first heating circuit 1, and are not described herein in detail. For example, referring to fig. 12, during the heating signal period T2, the phase of the driving signal transmitted by the first heating circuit 1 and the phase of the driving signal transmitted by the data signal line circuit 7 may be reversed, so that the data signal line circuit 7 and the first heating circuit 1 generate electromagnetic fields with opposite phases.
Optionally, fig. 13 is an enlarged schematic structural diagram of fig. 10 at D, and referring to fig. 10, 11 and 13, in a possible embodiment, the array substrate 4 may include a display area AA and a frame area NA, and the frame area NA is provided with a bonding pad 8; the data signal line circuit 7 includes a plurality of data signal lines 71 extending along the first direction X and sequentially arranged along the second direction Y, first ends 72 of the plurality of data signal lines 71 in the first direction X are all electrically connected to the bonding pads 8, second ends 73 of the plurality of data signal lines 71 in the first direction X are connected in pairs by the switch tubes 9, and the bonding pads 8 and the switch tubes 9 are located in frame areas NA on opposite sides of the display area AA in the first direction X; the first direction X and the second direction are perpendicular to each other, and the first end 72 and the second end 73 are two ends that are away from each other in the first direction X.
Referring to fig. 10, 11 and 13, the array substrate 4 may include a display area AA and a frame area NA, wherein a bonding pad 8 is disposed at the frame area NA, and the bonding pad 8 is used for connecting the first heating circuit 1, the data signal line circuit 7 and a driving chip (not shown).
Therefore, in order to heat the display panel 100 by multiplexing the data signal line circuit 7, in the present embodiment, the data signal line circuit 7 may include a plurality of data signal lines 71 extending in the first direction X and sequentially arranged in the second direction Y, such as the first data signal line 74, the second data signal line 75, the third data signal line 76, and the fourth data signal line 77 shown in fig. 13. First ends 72 of the plurality of data signal lines 71 in the first direction X are electrically connected to the bonding pads 8 to be connected to a driving chip (not shown); the second ends 73 of the data signal lines 71 in the first direction X are connected in pairs through the switch tubes 9 to realize short circuit between the data signal lines 71, the control ends of the switch tubes 9 are connected with the switch control signals SW, and the switch tubes 9 are turned on or off according to the switch control signals SW. The number of the data signal lines 71 shown in fig. 13 is merely an example, and the actual arrangement is not limited thereto.
Specifically, taking fig. 10 to fig. 13 as an example, in the data signal phase T1, the first switch tube 91 and the second switch tube 92 can be controlled to be turned off, and the driving chip (not shown in the figure) transmits the data signal 22 to each sub-pixel (not shown in the figure) in the display area AA through the first data signal line 74, the second data signal line 75, the third data signal line 76 and the fourth data signal line 77 respectively; in the heating signal period T2, the first switch tube 91 and the second switch tube 92 are controlled to be turned on, and at this time, the first data signal line 74 and the fourth data signal line 77, and the second data signal line 75 and the third data signal line 76 are connected, and the driving chip provides the heating signal to the first end 72 of each data signal line 71, so as to form a plurality of heating loops to heat the display panel 100.
Fig. 13 exemplarily shows that the first data signal line 74 and the fourth data signal line 77 are connected by the first switch tube 91, the second data signal line 75 and the third data signal line 76 are connected by the second switch tube 92, and the second switch tube 91 and the first switch tube 92 are sequentially arranged in the first direction X, but the actual arrangement is not limited thereto, and those skilled in the art can adjust the actual wiring manner of the data signal lines 71 in the display panel 100.
Further, the bonding pad 8 and the switch tube 9 are located in the frame area NA on two opposite sides of the display area AA in the first direction X, that is, the first end 72 and the second end 73 of the data signal line 71 are both located in the frame area NA on two opposite sides of the display area AA in the first direction X, and the first direction X and the second direction Y are perpendicular to each other, and the first end 72 and the second end 73 are two ends that are away from each other in the first direction X. This has the advantage that the data signal line circuit 7 can cover more area of the display panel 100, thereby improving the heating effect of the display panel 100.
Optionally, fig. 14 is a schematic structural diagram of another display panel according to an embodiment of the present invention, and fig. 15 is an enlarged structural diagram of fig. 14 at E, which can refer to fig. 14 and fig. 15, in another possible embodiment, each two adjacent data signal lines 71 in the plurality of data signal lines 71 are connected through one switch tube 9.
Specifically, as shown in fig. 14 and 15, in the plurality of data signal lines 71 extending in the first direction X and arranged in the second direction Y, every two adjacent data signal lines 71 are connected by one switching tube 9, and when each switching tube 9 is turned on, the two adjacent data signal lines 71 form a heating loop. In this arrangement, the data signal line circuit 7 can be directly designed as a routing loop under the adjacent black matrix, the arrangement of the data signal line circuit 7 is dense, the distance between the data signal lines 71 arranged in the second direction Y in the data signal line circuit 7 is very short, and the electromagnetic field radiation vectors generated by the opposite currents passing between the two adjacent data signal lines 71 are in opposite phase, so that the electromagnetic field interference of the heating circuit is further reduced, and the normal operation of the display panel 100 is ensured.
It is understood that, while the specific arrangement of the data signal line circuit 7 is described in the above embodiments, the first heating circuit 1 may also be designed according to the wiring manner of the data signal line circuit 7, and when the wiring manner of the data signal line circuit 7 changes, the arrangement of the first heating circuit 1 may also be adjusted accordingly.
Alternatively, referring to fig. 15, in the embodiment of the present invention, the switch tubes 9 may be arranged in the frame area NA along the second direction Y. As shown in fig. 15, the switch tubes 9 connecting the two data signal lines may also be arranged in the second direction Y and arranged in the frame area NA in sequence, that is, the switch tubes 9 are arranged in a line in the second direction Y, so as to reduce the area occupied by the switch tubes 9 in the frame area NA and reduce the influence of the switch tubes 9 on the frame area NA of the display panel 100.
Optionally, in the above embodiment, the first heating circuit 1 and the second heating circuit 2 are introduced in a wiring form, and the actual setting situation is not limited to this, and in the actual application process, the first heating circuit 1 and the second heating circuit 2 both include a plurality of wirings or a plurality of electrode blocks, or the first heating circuit 1 and the second heating circuit 2 are both in a metal grid shape.
Fig. 16 is a schematic structural diagram of another display panel according to an embodiment of the present invention, and fig. 17 is a schematic structural diagram of another display panel according to an embodiment of the present invention. The first heating circuit 1 and the second heating circuit 2 shown in fig. 16 include a plurality of electrode blocks; the first heating circuit 1 and the second heating circuit 2 shown in fig. 17 each have a metal mesh shape.
Of course, the structures of the first heating circuit 1 and the second heating circuit 2 are not limited to those shown in the above-mentioned figures, and those skilled in the art can adjust the structures of the first heating circuit 1 and the second heating circuit 2 according to the actual setting requirements.
Based on the same inventive concept, the embodiment of the invention also provides a display device. The display device includes the display panel 100 provided in any embodiment of the present invention, and therefore, the display device provided in the embodiment of the present invention has the corresponding beneficial effects of the display panel 100 provided in the embodiment of the present invention, and details are not repeated herein. For example, the display device may be an electronic device such as a mobile phone, a computer, a smart wearable device (e.g., a smart watch), and an in-vehicle display device, which is not limited in this embodiment of the present invention.
For example, fig. 18 is a schematic structural diagram of a display device according to an embodiment of the present invention. As shown in fig. 18, the display device includes the display panel 100 in the above-described embodiment.
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 illustrated herein, but is capable of various obvious modifications, rearrangements, combinations 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 is characterized by comprising a display panel, a first heating circuit and a second heating circuit, wherein the first heating circuit and the second heating circuit are mutually laminated and mutually insulated in the light emitting direction of the display panel;
the first heating circuit and the second heating circuit are positioned in the display panel or adjacent to the display panel, and the vertical projections of the first heating circuit and the second heating circuit on the plane of the display panel at least partially overlap with the display panel;
the first heating circuit and the second heating circuit are mutually overlapped in the vertical projection of the plane where the display panel is located, and the electromagnetic fields of the first heating circuit and the second heating circuit are opposite in phase.
2. The display panel according to claim 1, wherein the display panel comprises an array substrate, a display functional layer and a color film substrate, and the array substrate, the display functional layer and the color film substrate are sequentially stacked in a light emergent direction of the display panel;
the first heating circuit and the second heating circuit are both arranged in the array substrate or the color film substrate, or the first heating circuit and the second heating circuit are respectively arranged in the array substrate and the color film substrate.
3. The display panel according to claim 2, wherein the array substrate includes a data signal line circuit multiplexed as the second heating circuit.
4. The display panel according to claim 3, wherein the data signal line circuit includes a data signal phase and a heat signal phase, the data signal phase and the heat signal phase not overlapping on a time axis;
in the heating signal phase, the electromagnetic field of the data signal line circuit is in anti-phase with that of the first heating circuit.
5. The display panel according to claim 3, wherein the array substrate comprises a display area and a frame area, and the frame area is provided with a bonding pad;
the data signal line circuit comprises a plurality of data signal lines which extend along a first direction and are sequentially arranged along a second direction, first ends of the data signal lines in the first direction are electrically connected with the binding pads, second ends of the data signal lines in the first direction are connected in pairs through switch tubes, and the binding pads and the switch tubes are positioned in frame areas on two opposite sides of the display area in the first direction;
the first direction and the second direction are perpendicular to each other, and the first end and the second end are two ends which are deviated from each other in the first direction.
6. The display panel according to claim 5, wherein two adjacent data signal lines of the plurality of data signal lines are connected by one of the switching tubes.
7. The display panel according to claim 5 or 6, wherein the switching tubes are sequentially arranged in the second direction in the frame region.
8. The display panel according to claim 1, wherein the driving signals of the first heating circuit and the second heating circuit are both direct current signals and have the same amplitude and opposite polarities; or the driving signals of the first heating circuit and the second heating circuit are both alternating current signals and have opposite phases.
9. The display panel according to claim 1, wherein the first heating circuit and the second heating circuit each include a plurality of traces or a plurality of electrode blocks, or wherein the first heating circuit and the second heating circuit each have a metal mesh shape.
10. A display device characterized by comprising the display panel according to any one of claims 1 to 9.
CN202210645940.0A 2022-06-08 2022-06-08 Display panel and display device Active CN114895491B (en)

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