CN220894695U - Display panel - Google Patents

Abstract

The application discloses a display panel. The display panel includes: the driving circuit is connected with the pixel units of the display panel through the data lines and is connected with the touch electrodes of the display panel through the touch lines; a heating circuit for providing a heating voltage when the ambient temperature is lower than a preset temperature; and a plurality of heating leads, each heating lead being arranged in a first direction and extending in a second direction, the heating leads being configured to receive a heating voltage in a heating mode in connection with the heating circuit; and the heating leads are in one-to-one correspondence with part of the data lines, and the projections of the corresponding heating leads and the data lines in the third direction are at least partially overlapped. According to the display panel disclosed by the application, the display panel is uniformly heated on the basis that the number of the mask plates is not increased and the aperture ratio is not influenced, so that the display effect of the display panel under the low-temperature condition is improved.

Description

Display panel

Technical Field

The utility model relates to the technical field of display, in particular to a display panel.

Background

The Liquid crystal display device (Liquid CRYSTAL DISPLAY, LCD) has been widely used because of its advantages of small power consumption, miniaturization, light weight, and the like.

The LCD is basically developed by controlling a liquid crystal by an electric field so that liquid crystal molecules in the liquid crystal rotate to change deflection of light. Due to the self characteristics, the viscosity of liquid crystal molecules is increased at low temperature, the friction force of the liquid crystal molecules is increased, the viscosity coefficient is high, the movement of the molecules is weakened, the rotation speed of the molecules is influenced, the response time of the LCD is slow, and the normal display of the liquid crystal display device is seriously influenced.

Disclosure of utility model

In view of the foregoing, it is an object of the present application to provide a display panel that improves display effect and display performance at low temperature at a low cost.

According to an aspect of the present application, there is provided a display panel including: the driving circuit is connected with the pixel unit of the display panel through a data line and is connected with the touch electrode of the display panel through a touch line; a heating circuit for providing a heating voltage when the ambient temperature is lower than a preset temperature; and a plurality of heating leads, each of the heating leads being arranged in a first direction and extending in a second direction, the heating leads being configured to receive the heating voltage in connection with the heating circuit in a heating mode of the display panel; and the heating leads and the touch lines are positioned on the same conductor layer and are arranged in parallel, the heating leads and the data lines are positioned on different conductor layers and are arranged in parallel, the heating leads respectively correspond to the positions of the corresponding data lines, the projections of the heating leads and the corresponding data lines in the third direction are at least partially overlapped, the first direction is intersected with the second direction, and the third direction is perpendicular to a plane formed by the first direction and the second direction.

Optionally, the display panel includes: a display region including an opposite substrate and an array substrate disposed opposite to each other and a liquid crystal layer disposed between the opposite substrate and the array substrate; and a non-display area arranged on at least one side of the display area, wherein the driving circuit and the heating circuit are arranged in the non-display area, the array substrate comprises the pixel unit, the touch electrode, the data line, the touch line and the heating lead, and the heating lead is arranged across the display area along the second direction.

Optionally, the array substrate further includes virtual touch lines, where the virtual touch lines, the touch lines and the heating leads are located on the same conductor layer, and each virtual touch line is aligned with a corresponding one of the touch lines in the first direction and is disposed across the display area uncovered by the touch lines along the second direction.

Optionally, the non-display area further includes a first connection structure and a second connection structure, wherein one end of the heating lead is connected to the first connection structure, the other end of the heating lead is connected to the second connection structure, and the heating lead is connected to the driving circuit or the heating circuit through the first connection structure and the second connection structure.

Optionally, at least a portion of the data lines that do not correspond to the heating leads correspond to the positions of the virtual touch lines, and projections of each virtual touch line and the corresponding data line in a third direction at least partially overlap.

Optionally, the non-display area includes two first connection structures and two second connection structures, the first connection line is connected between the two first connection structures, the second connection line is connected between the two second connection structures, at least part of the first connection line and at least part of the second connection line are parallel to the second direction, and the heating lead is connected between the parallel parts of the first connection line and the second connection line.

Optionally, the heating circuit includes: the temperature detection module comprises a temperature sensor or a thermocouple and is used for detecting the ambient temperature; and the heating voltage output module is connected with the temperature detection module, and the output circuit is configured to output the heating voltage when the ambient temperature is lower than the preset temperature, wherein the output module is also connected with the driving circuit and sends a control signal to the driving circuit according to the ambient temperature.

Optionally, the driving circuit includes: the driving voltage output module is used for outputting the driving voltage and is also connected with the heating voltage output module, and the driving voltage output module is used for outputting control voltage according to the control signal; and a selection module connected to the driving voltage output module, the selection module being configured to select whether to output the driving voltage to the first connection structure and/or the second connection structure according to the control voltage.

Optionally, the selection module includes a triode, a collector of the triode receives the driving voltage, a base of the triode receives the control voltage, an emitter of the triode is connected with the first connection structure and/or the second connection structure, the driving circuit is configured to pull up the control voltage according to the control signal to turn on the triode when the ambient temperature is higher than the preset temperature, and to reduce the control voltage according to the control signal to turn off the triode when the ambient temperature is lower than the preset temperature.

Optionally, the heating lead is made of one or more materials selected from molybdenum aluminum molybdenum, aluminum molybdenum and copper.

The display panel provided by the embodiment of the utility model has the advantages that the heating leads are uniformly distributed on the display panel and are connected between the first connecting structure and the second connecting structure. In the display mode, the heating leads are connected with the driving circuit through the first connecting structure and/or the second connecting structure and receive driving voltage, so that the uniformity of the luminous brightness of the display panel is improved; in the heating mode, the heating leads are heated by applying heating voltage to the heating leads, so that the liquid crystal layer is heated, and the display effect and the display performance of the display panel at low temperature are improved. In addition, because the heating lead and the touch control line are arranged on the same layer, no additional heating wiring film layer is required, and the number of masks and the number of process steps can be saved when the display panel is manufactured, so that the manufacturing cost is reduced. Further, since the orthographic projections of the heating lead and the data line are at least partially overlapped, the influence on the aperture ratio of the display panel is small, and the display effect is improved and the service life of the product is also considered.

Drawings

The above and other objects, features and advantages of the present utility model will become more apparent from the following description of embodiments of the present utility model with reference to the accompanying drawings, in which:

Fig. 1 shows a schematic structural view of a display panel of an embodiment of the present application;

FIG. 2 shows a cross-sectional view along the line I-I' of the display area shown in FIG. 1;

FIG. 3 shows an equivalent wiring diagram of the virtual line in FIG. 1;

FIG. 4 shows an enlarged view along area 50 of FIG. 1;

FIG. 5 shows a schematic diagram of the connection of the heating leads to the heating circuit;

FIG. 6 shows a schematic diagram of the connection of the heating leads to the drive circuit;

fig. 7 shows a schematic view of the heating effect of the heating wire-like segment.

Detailed Description

Various embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts. For clarity, the various features of the drawings are not drawn to scale.

Also, certain terms are used throughout the description and claims to refer to particular components. It will be appreciated by those of ordinary skill in the art that manufacturers may refer to a component by different names. The present patent specification and claims do not take the form of an element or components as a functional element or components as a rule.

Unless defined otherwise, technical or scientific terms used in this disclosure should be given the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The terms "first," "second," and the like, as used in this disclosure, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Likewise, the terms "a," "an," or "the" and similar terms do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.

It should be noted that, hereinafter, the first direction intersects the second direction, alternatively, in some embodiments, the first direction is perpendicular to the second direction. The third direction is perpendicular to a plane formed by the first direction and the second direction.

Fig. 1 shows a schematic structural diagram of a display panel of an embodiment of the present application. As shown in fig. 1, the display panel 1 includes a display area 100 and a non-display area 200. In some embodiments, the non-display area 200 is disposed on at least one side of the display area 100; in the present application, the non-display area 200 surrounds the display area 100.

Fig. 2 shows a cross-sectional view along the line I-I' of the display area shown in fig. 1 for explaining the structure of the display area 200. As shown in fig. 2, the display area 200 includes a counter substrate 10, a liquid crystal layer 20, and an array substrate 30. The opposite substrate 10 and the array substrate 30 are disposed opposite to form a liquid crystal cell, thereby accommodating the liquid crystal layer 20 (i.e., the liquid crystal layer 20 is disposed between the array substrate 30 and the opposite substrate 10). The opposite substrate 10 may be a color film substrate, and a black matrix and a photoresist layer may be disposed on the color film substrate to display a color image. The array substrate 30 includes a plurality of stacked layers (not shown) made of different materials, for example, a plurality of conductive layers and a plurality of insulating layers, and different functional units of the array substrate are formed in one or more of the conductive layers.

Specifically, referring to fig. 1, the array substrate 30 includes a plurality of touch electrodes 110 and a plurality of touch lines 120 arranged in an array, each of which is arranged along a first direction (x-direction in the drawing) and extends in a second direction (y-direction in the drawing). An insulating layer (not shown) is disposed between the touch electrodes 110 and the touch lines 120, and each touch electrode 110 is electrically connected to its corresponding touch line 120 through a corresponding via 111 in the insulating layer. In the present embodiment, the touch electrodes 110 have different functions in different operation time. For example: the touch electrode is used in the touch detection time; and can also be used as a common electrode of the pixel unit in the display time. The touch electrodes are multiplexed into the common electrode, so that the number of layers of the touch screen is reduced, the cost is reduced, the light transmittance of the panel is improved, and a brighter display effect is obtained. In addition, the influence of display noise on touch sensitivity can be reduced by adopting a time-sharing multiplexing scheme, so that the touch performance is further improved.

Further, the array substrate 30 further includes a pixel unit for displaying a picture, a plurality of data lines, and a plurality of scan lines (not shown). For example, the data lines may be arranged along a first direction (x-direction shown) and extend in a second direction (y-direction shown), and the scan lines may be arranged along a second direction (y-direction shown) and extend in the first direction (x-direction shown). Each touch electrode 110 includes a plurality of pixel units in a covered region. Each pixel unit comprises a plurality of sub-pixels, and each sub-pixel receives driving signals through corresponding data lines and scanning lines for displaying. More specifically, in some embodiments, a pixel unit includes a red sub-pixel, a green sub-pixel, and a blue sub-pixel, each sub-pixel including an active element such as a thin film transistor, the source of each thin film transistor being connected to its corresponding data line; the grid electrode is connected with the corresponding scanning line. It should be understood that the pixel unit is not limited thereto, and for example, in some other embodiments, one pixel unit may include a red sub-pixel, a green sub-pixel, a blue sub-pixel, and a white sub-pixel.

Referring to fig. 1 and 3, to ensure uniformity of the light emitting circuit of the display panel 1, the array substrate 30 further includes a plurality of virtual touch lines 132 corresponding to the touch lines 120 one by one. The virtual touch lines 132 are disposed on the same conductor layer as the touch lines 120, and each virtual touch line 132 is aligned with the corresponding touch line 120 in a first direction (x-direction in the drawing) and disposed across the uncovered display area 100 of the touch line 120 in a second direction (y-direction in the drawing). The virtual touch line 132 is electrically insulated from the touch electrode 110. The purpose of the dummy touch lines 132 is to ensure uniformity of the light emitting brightness of the display panel 1, and the dummy touch lines 132 are not required to be electrically connected with the touch electrodes, so that the insulating layer between the dummy touch lines 132 and the touch electrodes 110 is not required to be provided with vias, so that the dummy touch lines 132 are electrically insulated from the touch electrodes.

Further, referring to fig. 1 and 3, in the present embodiment, the array substrate 30 further includes a plurality of heating leads 131. The heating lead 131 is disposed on the same conductor layer as the touch line 120 and the dummy touch line 132, and is disposed on a different conductor layer from the data line. The heating leads 131 are arranged along a first direction (x direction shown in the figure) and extend in a second direction (y direction shown in the figure) (i.e., the heating leads 131 are located on the same conductor layer as the touch lines 120 and are arranged in parallel), and each heating lead 131 is arranged across the display area 100 along the second direction. Further, referring to fig. 1 and 3, the display panel 1 further includes a first connection structure 210, a second connection structure 220, a first connection line 133, a second connection line 134, a driving circuit (not shown), and a heating circuit (not shown) disposed in the non-display region. In an embodiment of the present application, two first connection structures 210 and two second connection structures 220 are included. The first connection line 133 is connected between the two first connection structures 210, the second connection line 134 is connected between the two second connection structures 220, and at least a portion of the first connection line 133 is parallel to at least a portion of the second connection line 134 in the second direction (y-direction in the drawing), and both ends of the heating lead 131 are connected to portions of the first connection line 133 and the second connection line 134, respectively, which are parallel to each other. The display panel 1 is configured to operate in a heating mode or a display mode according to an ambient temperature, in which the heating leads 131 are connected to the heating circuit through the first and second connection structures 210 and 220, receive a heating voltage, and heat the display panel 1 through a resistive heating effect of each heating lead 131; in the display mode, the heating lead 131 is connected to the driving circuit through the first connection structure 210 and the second connection structure 220, and receives the driving voltage to improve the uniformity of the light emitting brightness of the display panel. In some embodiments, the heating lead is made of one or more materials selected from aluminum molybdenum aluminum, aluminum molybdenum, and copper. In a preferred embodiment, to improve the heating efficiency, a molybdenum-aluminum-molybdenum metal wire may be used as the heating lead. It should be understood, however, that the number of the first connection structure 210, the second connection structure 220, the first connection line 133 and the second connection line 134 of the present application should not be limited thereto. For example, in some embodiments, only one first connection structure 210 and one second connection structure 220 may be included, the first connection line 133 is connected to the first connection structure 210, the second connection line 134 is connected to the second connection structure 220, and a loop is formed through the first connection line 133, the heating lead 131, and the second connection line 134. As yet other embodiments, the same number of first and second connection structures 210, 220 as heating leads 131 are included, each heating lead 131 having a corresponding first and second connection structure 210, 220.

In some embodiments, to increase the aperture ratio of the display panel 1, the virtual touch lines 132 (i.e. the touch lines 120) and the heating leads 131 are disposed corresponding to the data lines in the third direction. Specifically, the data lines include a plurality of first data lines 141 in one-to-one correspondence with the plurality of virtual touch lines 132 and a plurality of second data lines 142 in one-to-one correspondence with at least the heating leads 131. Fig. 4 shows an enlarged view along the area 50 in fig. 1. As shown in fig. 4, in order to reduce the influence of each trace on the aperture ratio, the first data line 141 at least partially overlaps with the projection of the corresponding virtual touch line 132 in the third direction (in the z-axis direction in the drawing), and the second data line 142 at least partially overlaps with the projection of the corresponding heating lead 131 in the third direction (in the z-axis direction in the drawing). Wherein, the overlapping area is related to the line width of each wire, and no specific requirement is made here.

For ease of understanding, a touch electrode having a display panel resolution of 160 rgb 2560 and including 20 rows by 36 columns is specifically described. Then the display panel includes 4800 data lines and 720 touch lines. Then the corresponding number of first data lines is 720 and the number of second data lines is 4080. And at least part of 4080 second data lines are in one-to-one correspondence with the heating leads.

FIG. 5 shows a schematic diagram of the connection of an embodiment of the present application to a heating circuit. As shown in fig. 5, the heating circuit 300 includes a temperature detection module 310 and a heating voltage output module 320. The temperature detection module 310 is used to detect an ambient temperature, such as a temperature sensor or thermocouple. The heating voltage output module 320 is connected to the temperature detection module 320, and outputs a heating voltage to the heating lead when the ambient temperature is lower than a preset temperature. In some embodiments, the heating voltage output module 320 outputs different voltages to the first connection structure 210 and the second connection structure 220, so that the first lead 131 flows through current, and the first lead 131 heats up under the action of the current, so as to heat the liquid crystal layer 20, thereby improving the corresponding speed of the liquid crystal molecules in the liquid crystal layer 20 in a low-temperature environment, ensuring that the liquid crystal molecules in the display panel can still be corresponding rapidly in the low-temperature environment, and improving the display effect and the display performance of the display panel in the low-temperature environment. In addition, the heating voltage output module 320 also transmits a control signal to the driving circuit 400 according to the ambient temperature.

Fig. 6 shows a schematic diagram of connection between an embodiment of the present application and a driving circuit. As shown in fig. 6, the driving circuit 400 includes a driving voltage output module 420 and a selection module 410. The driving voltage output module 420 is configured to output a driving voltage, and in addition, the driving voltage output module 420 outputs a control voltage according to a control signal, the selection module 410 is connected to the driving voltage output module 420, receives the driving voltage Vcom and the selection voltage VDD, and selects whether to output the driving voltage to the first connection structure 210 and/or the second connection structure 220 according to the selection voltage VDD. Specifically, as shown in fig. 6, the selection module 410 includes, for example, a transistor Q1. The collector of the transistor Q1 is connected to the driving circuit 400 to receive the driving voltage Vcom, and the base receives the control voltage VDD, which is regulated by the driving circuit 400 according to the control signal in this embodiment. Specifically, when the ambient temperature is higher than the preset temperature, the control voltage VDD is controlled to rise by the control signal, the triode Q1 is turned on, and the heating lead 131 receives the driving voltage Vcom through the first connection structure 210 and the second connection structure 220 to display; when the ambient temperature is lower than the preset temperature, the control voltage VDD is controlled to be reduced by the control signal, the transistor Q1 is turned off, and the heating lead receives the heating voltage through the first connection structure 210 and the second connection structure 220. However, it should be understood that in some embodiments, only the first connection structure 210 or the second connection structure 220 is connected to the transistor, and in this embodiment, in order to avoid the voltage drop caused by the resistor in the heating wire 131, the driving voltage stability is affected, and the first connection structure 210 and the second connection structure 220 are connected to the transistor Q1.

Fig. 7 shows a schematic view of the heating effect of the heating lead-like segment. For the convenience of measurement, the sample section was selected to have a line width of 148um, and was measured under the conditions of a voltage supply of 12V, a current of 0.2A, and a resistance of 48 Ω, to obtain a heating effect diagram as shown in fig. 7. As shown in fig. 7, the heating lead sample section may be heated to 37 ℃ after heating for 30s, which may prove the feasibility of heating the display panel by the heating lead. Further, by measuring, a metal line with a line width of 148um can generate an effective heating area of 6000um, and if the display panel adopts a heating lead with a line width of 4um under the condition of the same heating power, the equivalent proportion conversion can generate an effective heating area of about 160um, which is enough to cover the distance d between adjacent heating leads under the normal condition, so that the display panel is heated uniformly through the heat conduction of the heating leads.

The display panel provided by the embodiment of the utility model has the advantages that the heating leads are uniformly distributed on the display panel and are connected between the first connecting structure and the second connecting structure. In the display mode, the heating leads are connected with the driving circuit through the first connecting structure and/or the second connecting structure and receive driving voltage, so that the uniformity of the luminous brightness of the display panel is improved; in the heating mode, the heating leads are heated by applying heating voltage to the heating leads, so that the liquid crystal layer is heated, and the display effect and the display performance of the display panel at low temperature are improved. In addition, because the heating lead and the touch control line are arranged on the same layer, no additional heating wiring film layer is required, and the number of masks and the number of process steps can be saved when the display panel is manufactured, so that the manufacturing cost is reduced. Further, since the orthographic projections of the heating lead and the data line are at least partially overlapped, the influence on the aperture ratio of the display panel is small, and the display effect is improved and the service life of the product is also considered.

Embodiments in accordance with the present utility model, as described above, are not intended to be exhaustive or to limit the utility model to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best utilize the utility model and various modifications as are suited to the particular use contemplated. The scope of the utility model should be determined by the following claims.

Claims (10)

1. A display panel, comprising:

The driving circuit is connected with the pixel unit of the display panel through a data line and is connected with the touch electrode of the display panel through a touch line;

A heating circuit for providing a heating voltage when the ambient temperature is lower than a preset temperature; and

A plurality of heating leads, each of the heating leads being arranged in a first direction and extending in a second direction, the heating leads being configured to receive the heating voltage in connection with the heating circuit in a heating mode of the display panel; is connected to the driving circuit to receive a driving voltage in a display mode of the display panel,

The heating leads and the touch lines are located on the same conductor layer and are arranged in parallel, the heating leads and the data lines are located on different conductor layers and are arranged in parallel, each heating lead corresponds to the corresponding position of the data line, the projections of each heating lead and the corresponding data line in the third direction are at least partially overlapped, the first direction is intersected with the second direction, and the third direction is perpendicular to a plane formed by the first direction and the second direction.

2. The display panel of claim 1, wherein the display panel comprises:

A display region including an opposite substrate and an array substrate disposed opposite to each other and a liquid crystal layer disposed between the opposite substrate and the array substrate; and

A non-display area arranged on at least one side of the display area, the driving circuit and the heating circuit are arranged in the non-display area,

The array substrate comprises the pixel unit, the touch electrode, the data line, the touch line and the heating lead, and the heating lead is arranged across the display area along the second direction.

3. The display panel of claim 2, wherein the array substrate further comprises virtual touch lines located on the same conductor layer as the touch lines and the heating leads, each virtual touch line being aligned with a corresponding one of the touch lines in the first direction and disposed across the display area not covered by the touch lines in the second direction.

4. The display panel according to claim 2, wherein the non-display region further comprises a first connection structure and a second connection structure, wherein one end of the heating lead is connected to the first connection structure and the other end is connected to the second connection structure, and the heating lead is connected to the driving circuit or the heating circuit through the first connection structure and the second connection structure.

5. The display panel according to claim 3, wherein at least a portion of the data lines not corresponding to the heating leads corresponds to a position of the virtual touch line, and projections of each virtual touch line and the corresponding data line in a third direction at least partially overlap.

6. The display panel according to claim 4, wherein the non-display region includes two of the first connection structures and two of the second connection structures, a first connection line is connected between the two first connection structures, a second connection line is connected between the two second connection structures, at least a portion of the first connection line and at least a portion of the second connection line are parallel to the second direction, and the heating wire is connected between portions of the first connection line and the second connection line that are parallel to each other.

7. The display panel of claim 6, wherein the heating circuit comprises:

the temperature detection module comprises a temperature sensor or a thermocouple and is used for detecting the ambient temperature;

a heating voltage output module connected to the temperature detection module, the heating voltage output module configured to output the heating voltage when the ambient temperature is lower than the preset temperature,

The heating voltage output module is further connected with the driving circuit, and sends a control signal to the driving circuit according to the ambient temperature.

8. The display panel of claim 7, wherein the driving circuit comprises:

The driving voltage output module is used for outputting the driving voltage and is also connected with the heating voltage output module, and the driving voltage output module is used for outputting control voltage according to the control signal; and

And a selection module connected with the driving voltage output module, wherein the selection module is configured to select whether to output the driving voltage to the first connection structure and/or the second connection structure according to the control voltage.

9. The display panel according to claim 8, wherein the selection module comprises a triode, a collector of the triode receives the driving voltage, a base of the triode receives the control voltage, an emitter of the triode is connected with the first connection structure and/or the second connection structure, the driving circuit is configured to pull up the control voltage according to the control signal to turn on the triode when the ambient temperature is higher than the preset temperature, and to lower the control voltage according to the control signal to turn off the triode when the ambient temperature is lower than the preset temperature.

10. The display panel of claim 1, wherein the heating wire is made of one or more materials selected from the group consisting of molybdenum aluminum molybdenum, and copper.