CN110673366B - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN110673366B CN110673366B CN201910877890.7A CN201910877890A CN110673366B CN 110673366 B CN110673366 B CN 110673366B CN 201910877890 A CN201910877890 A CN 201910877890A CN 110673366 B CN110673366 B CN 110673366B
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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
- G02F1/1323—Arrangements for providing a switchable viewing angle
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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
- G02F1/13338—Input devices, e.g. touch panels
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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
- G02F1/1343—Electrodes
Abstract
The invention discloses a display panel and a display device, the display panel comprises a color film substrate, an array substrate arranged opposite to the color film substrate and a liquid crystal layer positioned between the color film substrate and the array substrate, the color film substrate is provided with a plurality of pixel units and a black matrix for spacing the pixel units, each pixel unit is internally provided with a colored resistance layer, one side of the array substrate facing the liquid crystal layer is provided with a common electrode, the color film substrate is also provided with a plurality of electrode blocks arranged in an array manner, the electrode blocks are used for controlling visual angle switching and touch control induction, the electrode blocks are respectively electrically connected with a touch control chip through touch control wires, touch control voltage is applied to the electrode blocks and the common voltage is applied to the common electrode, when the voltage difference between the electrode blocks and the common electrode is smaller than a preset value, the display panel is in a first visual angle mode, when the voltage difference between the electrode blocks and the common electrode is larger than the preset value, the display panel is in a second viewing angle mode.
Description
Technical Field
The present invention relates to the field of liquid crystal technologies, and in particular, to a display panel and a display device.
Background
A Liquid Crystal Display (LCD) has advantages of good picture quality, small size, light weight, low driving voltage, low power consumption, no radiation, and relatively low manufacturing cost, and is dominant in the field of flat panel displays. The liquid crystal display device includes a color filter substrate and a thin film transistor array substrate which are oppositely disposed, and a liquid crystal layer interposed therebetween.
Liquid crystal display devices are now gradually developed toward wide viewing angles, and wide viewing angles can be realized by using liquid crystal display devices of an in-plane switching mode (IPS) or a fringe field switching mode (FFS). However, in the current society, people pay more and more attention to protecting their privacy, and do not like to take out and share with people. In public places, the content is always expected to be kept secret when the user watches a mobile phone or browses a computer. Therefore, the display with single viewing angle mode has not been able to satisfy the user's requirement. In addition to the requirement of a wide viewing angle, there is also a need to be able to switch or adjust the display device to a narrow viewing angle mode where privacy is required.
In order to realize the switching of the wide and narrow viewing angles of the liquid crystal display device, there is a method of applying a vertical electric field to liquid crystal molecules by using a viewing angle control electrode on one side of a color filter substrate to realize a narrow viewing angle mode. Referring to fig. 1 to 2, a liquid crystal display device includes a first substrate 1, a second substrate 3, and a liquid crystal layer 2 located between the first substrate 1 and the second substrate 3, wherein the first substrate 1 is a color filter substrate, the second substrate 3 is a thin film transistor array substrate, and the liquid crystal display device has a plurality of sub-pixels (e.g., R, G, B sub-pixels) distributed in an array. A pixel driving circuit including, for example, Thin Film Transistors (TFTs) for driving the plurality of sub-pixels, scanning lines, data lines, a pixel electrode 302, and a common electrode 301 is provided on the inner side of the second substrate 3.
As shown in fig. 1, when wide viewing angle display is required, the viewing angle control electrode 101 of the first substrate 3 applies a voltage equal to or close to that of the common electrode 301, so that the potential difference between the viewing angle control electrode 101 and the common electrode 301 of the second substrate 3 is small, and the liquid crystal display device realizes wide viewing angle display under the in-plane electric field between the pixel electrode 302 and the common electrode 301.
As shown in fig. 2, when a narrow viewing angle display is required, a voltage different from that of the common electrode 301 is applied to the viewing angle control electrode 101 of the first substrate 1, so that a large potential difference exists between the viewing angle control electrode 101 and the common electrode 301 of the second substrate 3, at this time, a vertical electric field (as shown by an arrow E in the figure) is generated between the first substrate 1 and the second substrate 3, liquid crystal molecules in the liquid crystal layer 2 are tilted due to the vertical electric field while horizontally rotating under the in-plane electric field between the pixel electrode 302 and the common electrode 301, and the liquid crystal molecules leak light to reduce the contrast of the liquid crystal display device, thereby finally realizing the narrow viewing angle display.
Touch screens have been widely used in many fields such as personal computers, smart phones, public information, smart appliances, industrial control, and the like. In the current touch field, there are mainly resistive touch screens, photoelectric touch screens, ultrasonic touch screens, and planar capacitive touch screens, which are also externally hung or embedded according to the position distribution.
Currently, touch control of a display screen is basically of an external hanging type, which requires an additional touch control box outside the display device, for example, a touch control box 102 is disposed outside the first substrate 1, as shown in fig. 1. Of course, some display panels are in-cell touch, for example, a touch layer is disposed on the second substrate 3 for touch control, the touch signal-to-noise ratio of the in-cell touch display panel changes with the display frames, and different display frames have different liquid crystal arrangements to cause different self-capacitances, which requires a long time to adjust the signal-to-noise ratio to meet the required requirements. And this structure also needs to plate a high resistance film on the first substrate 1 to prevent static electricity.
Because the touch box 102 for touch function is generally of an externally-hung type, and needs to be attached to a liquid crystal box independently, the thickness of the touch box can be increased, and the touch box 102 and the viewing angle control electrode 101 are separately manufactured on different layers, so that the respective functions are realized, when the liquid crystal box is in a narrow viewing angle, the viewing angle switching signal applied to the viewing angle control electrode 102 interferes with the touch signal, so that the touch signal is insensitive, or the touch signal interferes with the viewing angle switching signal, so that the narrow viewing angle effect is poor.
Disclosure of Invention
In order to overcome the disadvantages and shortcomings of the prior art, an object of the present invention is to provide a display panel and a display device, so as to solve the problems of the prior art that the thickness of the display panel is thick and the touch layer and the viewing angle switching electrode interfere with each other.
The purpose of the invention is realized by the following technical scheme:
the invention provides a display panel, which comprises a color film substrate, an array substrate arranged opposite to the color film substrate and a liquid crystal layer positioned between the color film substrate and the array substrate, wherein the color film substrate is provided with a plurality of pixel units and a black matrix for spacing the pixel units, each pixel unit is internally provided with a colored resistance layer, one side of the array substrate facing the liquid crystal layer is provided with a common electrode, the color film substrate is also provided with a plurality of electrode blocks which are arranged in an array manner and used for controlling visual angle switching and touch control induction, the electrode blocks are respectively and electrically connected with a touch control chip through touch control wires, touch control voltage is applied to the electrode blocks and the common electrode, when the voltage difference between the electrode blocks and the common electrode is less than a preset value, the display panel is in a first visual angle mode, and when the voltage difference between the electrode blocks and the common electrode is more than the preset value, the display panel is in a second viewing angle mode.
Furthermore, the touch trace is located on the array substrate, the electrode block is provided with a conductive protrusion, and the electrode block is electrically connected with the touch trace through the conductive protrusion.
Furthermore, a conductive block is arranged between the conductive protrusion and the touch trace, the array substrate is provided with a first contact hole corresponding to the conductive block, and the conductive block covers the first contact hole and electrically connects the conductive protrusion and the touch trace.
Furthermore, the electrode block is provided with a plurality of conductive protrusions, the number of the conductive blocks and the number of the first contact holes are the same as the number of the conductive protrusions, the array substrate is further provided with a connecting electrode, the connecting electrode is located between the conductive blocks and the touch wiring, and the connecting electrode is used for connecting the conductive blocks and the touch wiring.
Furthermore, a plurality of spacers are arranged on the color film substrate, the black matrix and the color resistance layer cover the color film substrate, the spacers are formed on the black matrix, the electrode block covers the black matrix, the color resistance layer and the spacers, and the conductive protrusions correspond to the spacers.
Furthermore, a plurality of spacers are arranged on the color film substrate, the electrode block covers the color film substrate, the black matrix and the color resistance layer cover the electrode block, the spacers are formed on the black matrix, a second contact hole is arranged on the black matrix, the conductive protrusion corresponds to the spacers, and the conductive protrusion covers the second contact hole and contacts with the electrode block.
Furthermore, the second contact hole is inclined, and the projections of the openings at the two ends of the second contact hole on the color film substrate are staggered.
Furthermore, the touch trace and the data line on the array substrate are parallel to each other and located on the same layer.
Further, each electrode block corresponds to a plurality of the pixel units.
The invention also provides a display device comprising the display panel.
The invention has the beneficial effects that: the display panel comprises a color film substrate, an array substrate arranged opposite to the color film substrate and a liquid crystal layer positioned between the color film substrate and the array substrate, wherein the color film substrate is provided with a plurality of pixel units and a black matrix for spacing the pixel units, each pixel unit is internally provided with a colored resistance layer, one side of the array substrate facing the liquid crystal layer is provided with a common electrode, the color film substrate is also provided with a plurality of electrode blocks which are arranged in an array manner and used for controlling visual angle switching and touch sensing, the electrode blocks are respectively electrically connected with a touch chip through touch wiring, touch voltage is applied to the electrode blocks, and the common voltage is applied to the common electrode, when the voltage difference between the electrode blocks and the common electrode is less than a preset value, the display panel is in a first viewing angle mode, and when the voltage difference between the electrode block and the common electrode is greater than a preset value, the display panel is in a second visual angle mode. When different visual angle modes, through applying different touch-control voltage to the electrode block, make have different pressure differentials and form the vertical electric field of different intensity between electrode block and the common electrode, the liquid crystal molecule in the liquid crystal layer presents the gesture of standing of different angles in the vertical electric field of different intensity, thereby control visual angle switches, and when user touch display panel, touch chip perception user touches the position that corresponds the electrode block, thereby real touch-control function, with the thickness that has reduced the display panel and prevented that touch-control and visual angle from switching the problem that can mutual interference.
Drawings
FIG. 1 is a schematic diagram of a display panel with a narrow viewing angle in the prior art;
FIG. 2 is a schematic diagram of a display panel with a wide viewing angle in the prior art;
fig. 3 is a schematic plan structure diagram of a color film substrate according to the present invention;
FIG. 4 is a schematic structural diagram of a display panel with a narrow viewing angle according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a display panel with a wide viewing angle according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a display panel in a narrow viewing angle according to a second embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a display panel according to a second embodiment of the present invention;
FIG. 8 is a schematic structural diagram of a display panel in a narrow viewing angle according to a third embodiment of the present invention;
fig. 9 is a schematic structural diagram of a display panel in a wide viewing angle according to a third embodiment of the present invention.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects of the display panel and the display device according to the present invention with reference to the accompanying drawings and the preferred embodiments is as follows:
[ example one ]
Fig. 3 is a schematic plan view of a color filter substrate according to the present invention, fig. 4 is a schematic structural diagram of a display panel at a narrow viewing angle according to a first embodiment of the present invention, and fig. 5 is a schematic structural diagram of a display panel at a wide viewing angle according to a first embodiment of the present invention.
As shown in fig. 3 to fig. 5, a display panel according to a first embodiment of the present invention includes a color filter substrate 10, an array substrate 20 disposed opposite to the color filter substrate 10, and a liquid crystal layer 30 located between the color filter substrate 10 and the array substrate 20. In this embodiment, positive liquid crystal molecules, that is, liquid crystal molecules having positive dielectric anisotropy, are used in the liquid crystal layer 30, and in an initial state, the positive liquid crystal molecules in the liquid crystal layer 30 are aligned parallel to the color filter substrate 10 and the array substrate 20, the alignment directions of the positive liquid crystal molecules near the color filter substrate 10 and the positive liquid crystal molecules near the array substrate 20 are antiparallel, and at this time, the display panel has a wide viewing angle. Certainly, the positive liquid crystal molecules may have a smaller pretilt angle (e.g., smaller than 7 °) during initial alignment, that is, the positive liquid crystal molecules initially form a smaller included angle with the color filter substrate 10 and the array substrate 20, and the positive liquid crystal molecules may be accelerated to deflect toward the vertical direction when switching to the narrow viewing angle.
A plurality of scanning lines (not shown), a plurality of data lines 21 and thin film transistors (not shown) are disposed on one side of the array substrate 20 facing the liquid crystal layer 30, a plurality of sub-pixels are defined on the array substrate 20 by the plurality of scanning lines and the plurality of data lines 21 being insulated from each other and crossed, a pixel electrode 25 and a thin film transistor are disposed in each sub-pixel, the pixel electrode 25 is electrically connected with the scanning lines and the data lines 21 of adjacent thin film transistors through the thin film transistors, and a common electrode 24 is further disposed on one side of the array substrate 20 facing the liquid crystal layer 30.
As shown in fig. 4, in the present embodiment, the common electrode 24 and the pixel electrode 25 are located at different layers and insulated and isolated by an insulating layer. The common electrode 24 may be located above or below the pixel electrode 25 (the common electrode 24 is located below the pixel electrode 25 in fig. 4), and preferably, the common electrode 24 is a planar electrode disposed over the entire surface, and the pixel electrode 25 is a block electrode disposed in one block in each sub-pixel or a slit electrode having a plurality of electrode bars to form a Fringe Field Switching (FFS) mode. Of course, In other embodiments, the pixel electrode 25 and the common electrode 24 may be located on the same layer, but they are insulated and isolated from each other, and each of the pixel electrode 25 and the common electrode 24 may include a plurality of electrode stripes, and the electrode stripes of the pixel electrode 25 and the electrode stripes of the common electrode 24 are alternately arranged with each other to form an In-Plane Switching (IPS) mode. The thin film transistor includes a gate electrode, an active layer, a drain electrode and a source electrode, the gate electrode and the plurality of scan lines are located on the same layer and electrically connected, the gate electrode and the active layer are insulated and isolated by an insulating layer, the insulating layer covers the drain electrode, the source electrode and the data line 21, the source electrode is electrically connected to the data line 21, the drain electrode is electrically connected to the pixel electrode 25 through a via hole, and further detailed descriptions are omitted with reference to the prior art for further detailed descriptions of the array substrate.
The color film substrate 10 is provided with a plurality of pixel units and a black matrix 11 for spacing the pixel units, each pixel unit corresponds to one sub-pixel, a color resistance layer 12 is arranged in each pixel unit, the color resistance layer 12 comprises a red (R), green (G) and blue (B) color resistance material and correspondingly forms red (R), green (G) and blue (B) sub-pixels, the color film substrate 10 is further provided with a plurality of electrode blocks 14 which are arranged in an array manner, the electrode blocks 14 are respectively electrically connected with a touch chip 50 through touch wires 22, and the electrode blocks 14 are used for controlling visual angle switching and touch induction, so that the display panel has visual angle switching and touch functions at the same time. In this embodiment, each electrode block 14 corresponds to a plurality of pixel units, and preferably, each electrode block 14 corresponds to three pixel units, that is, three pixel units of red (R), green (G), and blue (B), although in other embodiments, each electrode block 14 may correspond to one pixel unit or two pixel units, and the disclosure is not limited thereto.
In this embodiment, the black matrix 11 and the color resistance layer 12 are located between the color filter substrate 10 and the electrode blocks 14, the color filter substrate 10 is provided with a plurality of columnar spacers (spacers) 13, each electrode block 14 is correspondingly provided with one Spacer 13, the black matrix 11 and the color resistance layer 12 cover the color filter substrate 10, the spacers 13 are formed on the black matrix 11, the electrode blocks 14 cover the black matrix 11, the color resistance layer 12 and the spacers 13, the electrode blocks 14 form conductive protrusions 141 corresponding to the positions of the spacers 13, the touch lines 22 are located on the array substrate 20, the touch lines 22 are parallel to the data lines 21 and located on the same layer, the touch lines 22 are insulated from the data lines 21, that is, the touch lines 22 and the data lines 21 are etched by using the same metal film, and the touch lines 22 and the data lines 21 both correspond to the positions right below the black matrix 11. The touch traces 22 can be bonded to the touch chip 50 in the non-display area. The electrode blocks 14 are electrically connected to the touch traces 22 through the conductive bumps 141, and meanwhile, the conductive bumps 141 and the spacers 13 are used for supporting the liquid crystal cell. Certainly, in other embodiments, the touch trace 22 may also be located on the color film substrate 10, but a metal film needs to be additionally formed on the color film substrate 10 and used for etching to form the touch trace 22, so that a manufacturing process is added, but this embodiment is not excluded.
In this embodiment, the conductive bump 26 is disposed between the conductive protrusion 141 and the touch trace 22, the array substrate 20 is disposed with a first contact hole D1 corresponding to the conductive bump 26, certainly, the array substrate 20 is disposed with a via hole (not shown) at a position corresponding to the drain, the first contact hole D1 and the via hole can be formed by etching at the same time, the conductive bump 26 and the pixel electrode 25 can also be formed by etching the same metal film, the pixel electrode 25 covers the via hole and is connected to the drain, and the conductive bump 26 covers the first contact hole D1 and electrically connects the conductive protrusion 141 and the touch trace 22. Furthermore, the array substrate 20 is further provided with a connection electrode 23, the connection electrode 23 is located between the conductive block 26 and the touch trace 22, each electrode block 14 corresponds to one connection electrode 23, the connection electrode 23 is insulated and separated from the data line 21 and the common electrode 24 by an insulating layer, the connection electrode 23 is electrically connected to the touch trace 22 and the conductive block 26, preferably, the connection electrode 23 is in a strip shape and corresponds to a position right below the black matrix 11, and the connection electrode 23 is used for reducing resistance between the electrode block 14 and the touch trace 22. Of course, the connection electrode 23 is not required to be provided in this embodiment, and the invention is not limited thereto.
The color filter substrate 10 is further provided with a first polarizer 41, the array substrate 20 is further provided with a second polarizer 42, the first polarizer 41 is located on one side of the color filter substrate 10 away from the liquid crystal layer 30, the second polarizer 42 is located on one side of the array substrate 20 away from the liquid crystal layer 30, and transmission axes of the first polarizer 41 and the second polarizer 42 are perpendicular to each other. The color filter substrate 10 and the array substrate 20 are provided with alignment layers (not shown) on the sides facing the liquid crystal layer 30, the alignment layers are used for aligning liquid crystal molecules in the liquid crystal layer 30, the thickness of the alignment layers is about 0.05 μm, when the color filter substrate 10 and the array substrate 20 are packaged, the conductive bumps 141 can pierce through the alignment layers by pressure, so that the conductive bumps 141 and the conductive blocks 26 are electrically connected, or after the alignment layers are coated, the alignment layers are not first hard-baked, but the color filter substrate 10 and the array substrate 20 are first subjected to pre-packaging treatment, so that the conductive bumps 141 pierce through the alignment layers to form via holes, then the color filter substrate 10 and the array substrate 20 are separated to be hard-baked, or after the alignment layers are coated, an etching process is added and the via holes are etched at the conductive blocks 26, so that the conductive bumps 141 and the conductive blocks 26 are electrically connected, but not limited thereto.
The color film substrate 10 and the array substrate 20 may be made of glass, acrylic acid, polycarbonate, and other materials. The materials of the common electrode 24, the pixel electrode 25, and the electrode block 14 may be Indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), or the like.
As shown in fig. 4, when the display panel is in the first viewing angle mode, that is, in the wide viewing angle mode, a common voltage (Vcom), preferably a direct current voltage, is applied to the common electrode 24, a smaller touch voltage (which may be 0V) is applied to the electrode block 14, so that a voltage difference between the electrode block 14 and the common electrode 24 is zero or smaller than a preset value (for example, 0.5V), a vertical electric field is not formed or a weaker vertical electric field is formed between the electrode block 14 and the common electrode 24, at this time, an angle of positive liquid crystal molecules is hardly deflected (as shown in fig. 4), and the display panel realizes normal wide viewing angle display. The pixel electrode 25 applies corresponding gray scale voltage, a voltage difference is formed between the pixel electrode 25 and the common electrode 24 and a horizontal electric field E1 is generated, so that the positive liquid crystal molecules deflect in the horizontal direction in a direction parallel to the horizontal electric field, the gray scale voltage comprises 0-255 gray scale voltage, and when different gray scale voltages are applied to the pixel electrode 25, the pixel unit presents different brightness, thereby displaying different pictures and realizing the normal display of the display panel under a wide viewing angle.
As shown in fig. 5, when the display panel is in the second viewing angle mode, that is, in the narrow viewing angle mode, a common voltage (Vcom), preferably a direct current voltage, is applied to the common electrode 24, a larger touch voltage (for example, 3 to 5V) is applied to the electrode block 14, so that a voltage difference between the electrode block 14 and the common electrode 24 is larger than a preset value (for example, 5V), a vertical electric field E2 is formed between the color film substrate 10 and the array substrate 20, the positive liquid crystal molecules are greatly deflected in the vertical direction, so that large-angle viewing light leakage occurs in the display panel, the contrast is reduced in the oblique viewing direction, the viewing angle is narrowed, and the display panel finally realizes narrow viewing angle display. The pixel electrode 25 applies corresponding gray scale voltage, a voltage difference is formed between the pixel electrode 25 and the common electrode 24 and a horizontal electric field is generated, so that the positive liquid crystal molecules deflect towards the direction parallel to the horizontal electric field in the horizontal direction, the gray scale voltage comprises 0-255 gray scale voltage, and when different gray scale voltages are applied to the pixel electrode 25, the pixel unit presents different brightness, thereby displaying different pictures and realizing normal display of the display panel under a narrow viewing angle.
Certainly, in other embodiments, the liquid crystal layer 30 may also adopt negative liquid crystal molecules, for example, when the negative liquid crystal molecules are initially aligned, a certain included angle is formed between the negative liquid crystal molecules and the color film substrate 10 and the array substrate 20, so that the display panel has a large-angle observation light leakage and is in a narrow viewing angle mode, when the voltage difference between the electrode block 14 and the common electrode 24 is greater than a preset value, the negative liquid crystal molecules deflect towards a direction parallel to the color film substrate 10 and the array substrate 20 under the action of the vertical electric field, so that the display panel is in a wide viewing angle mode, that is, when the liquid crystal layer 30 adopts the negative liquid crystal molecules, the first viewing angle mode is the narrow viewing angle mode, and the second viewing angle mode is the wide viewing angle mode.
No matter in the wide viewing angle mode or the narrow viewing angle mode, when a user touches the display panel, a capacitance is formed between the finger and the electrode block 14 corresponding to the touched position, i.e. self-capacitance touch, the electric quantity on the electrode block 14 changes, and the touch chip 50 can sense the change of the electric quantity on the electrode block 14 corresponding to the touched position of the user to detect the touched position of the user on the display panel, thereby realizing the touch function. Therefore, the display panel has the visual angle switching and touch control functions at the same time, the thickness of the display panel is reduced, and the problem that the touch control and the visual angle switching can interfere with each other is solved.
[ example two ]
Fig. 6 is a schematic structural diagram of a display panel in a narrow viewing angle according to a second embodiment of the present invention, and fig. 7 is a schematic structural diagram of a display panel in a wide viewing angle according to the second embodiment of the present invention. As shown in fig. 6 to fig. 7, the display panel provided by the second embodiment of the present invention is substantially the same as the display panel provided by the first embodiment (fig. 4 and fig. 5), except that in the present embodiment, a plurality of conductive protrusions 141 are provided on the electrode block 14, the number of the conductive blocks 26 and the first contact holes D1 is the same as the number of the conductive protrusions 141, each electrode block 14 has a plurality of columnar spacers 13, for example, each electrode block 14 has three spacers 13, three conductive protrusions 141, three first contact holes D1 and three conductive blocks 26.
In this embodiment, the touch trace 22 and the data line 21 are parallel to each other and located at different layers, the touch trace 22 and the data line 21 are isolated by an insulating layer, and the touch trace 22 may be made of transparent metal and penetrate through a plurality of pixel units. The array substrate 20 is further provided with a connection electrode 23, the connection electrode 23 is located between the conductive blocks 26 and the touch trace 22, each electrode block 14 corresponds to one connection electrode 23, the connection electrode 23 is insulated and separated from the data line 21 and the common electrode 24 by an insulating layer, the connection electrode 23 is electrically connected with the touch trace 22 and the plurality of conductive blocks 26, preferably, the connection electrode 23 is a strip electrode and corresponds to the position right below the black matrix 11, the connection electrode 23 is used for reducing the resistance between the electrode block 14 and the touch trace 22, and the connection electrode 23 is used for electrically connecting the plurality of conductive blocks 26 with the touch trace 22.
Compared with the first embodiment, in the present embodiment, each electrode block 14 corresponds to the plurality of conductive bumps 141, and the plurality of conductive bumps 141 are connected to the touch trace 22 through the connection electrode 23, so that the resistance between the electrode block 14 and the touch trace 22 is further reduced, and the power consumption is reduced.
It should be understood by those skilled in the art that the rest of the structure and the operation principle of the present embodiment are the same as those of the first embodiment, and are not described herein again.
[ third example ]
Fig. 8 is a schematic structural diagram of a display panel in a narrow viewing angle according to a third embodiment of the present invention, and fig. 9 is a schematic structural diagram of a display panel in a wide viewing angle according to the third embodiment of the present invention. As shown in fig. 8 to 9, a display panel according to a third embodiment of the present invention is substantially the same as the display panel according to the first embodiment (fig. 4 and 5), except that in this embodiment, an electrode block 14 is located between a color filter 12 and a color filter substrate 10, the color filter substrate 10 is provided with a plurality of spacers 13, the electrode block 14 covers the color filter substrate 10, a black matrix 11 and the color filter 12 cover the electrode block 14, the spacers 13 are formed on the black matrix 11, the black matrix 11 is provided with a second contact hole D2, a conductive protrusion 141 corresponds to the spacers 13, the conductive protrusion 141 covers the second contact hole D2 and contacts the electrode block 14, a flat layer is further provided between the electrode block 14 and the color filter 12, and the electrode block 14 and the conductive protrusion 141 are respectively made of two metal layers.
In this embodiment, the second contact hole D2 is inclined, projections of the openings at two ends of the second contact hole D2 on the color filter substrate 10 are staggered, and preferably, projections of the openings at two ends of the second contact hole D2 on the color filter substrate 10 are not overlapped, so as to prevent light leakage at the second contact hole D2 and influence normal display. For example, the black matrix 11 may be developed by two exposures, a first exposure may form a groove for accommodating the color resist layer 12, and a second exposure may form a certain angle between the light of the photolithography and the color film substrate 10, so as to form the inclined second contact hole D2.
Compared with the first embodiment, the electrode block 14 is disposed between the color resist layer 12 and the color filter substrate 10, so that the electrode block 14 is closer to the outer side of the liquid crystal cell, that is, closer to the finger of the user, and the touch sensitivity can be increased.
It should be understood by those skilled in the art that the rest of the structure and the operation principle of the present embodiment are the same as those of the first embodiment, and are not described herein again.
The invention also provides a display device comprising the display panel.
In this document, the terms upper, lower, left, right, front, rear and the like are used for defining the positions of the structures in the drawings and the positions of the structures relative to each other, and are only used for the clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims. It is also to be understood that the terms "first" and "second," etc., are used herein for descriptive purposes only and are not to be construed as limiting in number or order.
Although the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention.
Claims (8)
1. A display panel comprises a color film substrate (10), an array substrate (20) arranged opposite to the color film substrate (10) and a liquid crystal layer (30) positioned between the color film substrate (10) and the array substrate (20), wherein the color film substrate (10) is provided with a plurality of pixel units and a black matrix (11) for spacing the pixel units, each pixel unit is internally provided with a color resistance layer (12), one side of the array substrate (20) facing the liquid crystal layer (30) is provided with a common electrode (24), the display panel is characterized in that the color film substrate (10) is provided with a plurality of spacers (13), the black matrix (11) and the color resistance layer (12) cover the color film substrate (10), and the spacers (13) are formed on the black matrix (11); the color film substrate (10) is further provided with a plurality of electrode blocks (14) which are arranged in an array manner, the electrode blocks (14) cover the black matrix (11), the color resistance layer (12) and the spacers (13), the electrode blocks (14) are used for controlling visual angle switching and touch sensing, the electrode blocks (14) are respectively electrically connected with a touch chip (50) through touch routing (22) positioned on the array substrate (20), touch voltage is applied to the electrode blocks (14) and public voltage is applied to the public electrode (24), when the voltage difference between the electrode blocks (14) and the public electrode (24) is smaller than a preset value, the display panel is in a first visual angle mode, and when the voltage difference between the electrode blocks (14) and the public electrode (24) is larger than the preset value, the display panel is in a second visual angle mode;
the electrode block (14) is provided with a conductive protrusion (141), the conductive protrusion (141) corresponds to the spacer (13), and the electrode block (14) is electrically connected with the conductive block (26) on the array substrate (20) and the touch control trace (22) through the conductive protrusion (141); the array substrate (20) is further provided with a connecting electrode (23), the connecting electrode (23) is located between the conductive blocks (26) and the touch-control wiring (22), and the connecting electrode (23) is used for connecting the conductive blocks (26) with the touch-control wiring (22); the array substrate (20) is further provided with a pixel electrode (25), and the pixel electrode (25) and the common electrode (24) form a fringe field switching mode.
2. The display panel according to claim 1, wherein the array substrate (20) has a first contact hole (D1) corresponding to the conductive bump (26), and the conductive bump (26) covers the first contact hole (D1) and electrically connects the conductive bump (141) and the touch trace (22).
3. The display panel according to claim 2, wherein the electrode block (14) is provided with a plurality of conductive bumps (141), and the number of the conductive blocks (26) and the first contact holes (D1) is the same as the number of the conductive bumps (141).
4. The display panel according to claim 1, wherein a plurality of spacers (13) are disposed on the color filter substrate (10), the electrode block (14) covers the color filter substrate (10), the black matrix (11) and the color resist layer (12) cover the electrode block (14), the spacers (13) are formed on the black matrix (11), the black matrix (11) is disposed with a second contact hole (D2), the conductive protrusion (141) corresponds to the spacers (13), and the conductive protrusion (141) covers the second contact hole (D2) and contacts the electrode block (14).
5. The display panel according to claim 4, wherein the second contact hole (D2) is inclined, and projections of openings at two ends of the second contact hole (D2) on the color filter substrate (10) are mutually staggered.
6. The display panel of claim 1, wherein the touch trace (22) and the data line (21) on the array substrate (20) are parallel to each other and located on the same layer.
7. The display panel according to claim 1, wherein each electrode block (14) corresponds to a plurality of the pixel units.
8. A display device characterized by comprising the display panel according to any one of claims 1 to 7.
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| CN201910877890.7A CN110673366B (en) | 2019-09-17 | 2019-09-17 | Display panel and display device |
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| CN201910877890.7A CN110673366B (en) | 2019-09-17 | 2019-09-17 | Display panel and display device |
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| CN111208681B (en) * | 2020-01-16 | 2022-04-22 | 昆山龙腾光电股份有限公司 | Light modulation box, display panel and driving method |
| CN111367431B (en) * | 2020-02-25 | 2023-01-13 | 京东方科技集团股份有限公司 | Array substrate and display device |
| CN111552111B (en) * | 2020-05-13 | 2021-07-27 | 苏州华星光电技术有限公司 | Display panel and display device |
| CN112327547B (en) * | 2020-11-20 | 2022-10-11 | 厦门天马微电子有限公司 | Display module and display device |
| CN115708011A (en) * | 2021-08-19 | 2023-02-21 | 北京京东方技术开发有限公司 | Display substrate, preparation method thereof and display device |
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| TWI408449B (en) * | 2009-11-03 | 2013-09-11 | Wintek Corp | Liquid crystal display panel |
| CN102841466B (en) * | 2012-09-20 | 2015-08-26 | 昆山龙腾光电有限公司 | Liquid crystal indicator |
| CN106126000A (en) * | 2016-06-28 | 2016-11-16 | 友达光电（昆山）有限公司 | Display device |
| TWI607364B (en) * | 2016-09-22 | 2017-12-01 | 友達光電股份有限公司 | Touch display panel and driving method thereof |
| CN106501982A (en) * | 2016-12-13 | 2017-03-15 | 昆山龙腾光电有限公司 | Compound liquid crystal indicator |
| CN106773176B (en) * | 2017-01-03 | 2020-02-21 | 昆山龙腾光电股份有限公司 | Liquid crystal display device with switchable viewing angle and driving method |
| US11188169B2 (en) * | 2017-05-24 | 2021-11-30 | Infovision Optoelectronics (Kunshan) Co., Ltd. | Touch display panel and touch display device with switchable viewing angles |
| CN109062458B (en) * | 2018-09-17 | 2021-05-28 | 昆山龙腾光电股份有限公司 | Touch display panel and display device |
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