CN114721196A - Display panel, driving method thereof and display device - Google Patents
Display panel, driving method thereof and display device Download PDFInfo
- Publication number
- CN114721196A CN114721196A CN202210519151.2A CN202210519151A CN114721196A CN 114721196 A CN114721196 A CN 114721196A CN 202210519151 A CN202210519151 A CN 202210519151A CN 114721196 A CN114721196 A CN 114721196A
- Authority
- CN
- China
- Prior art keywords
- display panel
- layer
- electrode
- substrate
- display
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000000758 substrate Substances 0.000 claims abstract description 79
- 239000010409 thin film Substances 0.000 claims abstract description 17
- 239000010410 layer Substances 0.000 claims description 161
- 239000000463 material Substances 0.000 claims description 23
- 239000010949 copper Substances 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 229910052709 silver Inorganic materials 0.000 claims description 4
- 239000004332 silver Substances 0.000 claims description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 3
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 3
- UHESRSKEBRADOO-UHFFFAOYSA-N ethyl carbamate;prop-2-enoic acid Chemical compound OC(=O)C=C.CCOC(N)=O UHESRSKEBRADOO-UHFFFAOYSA-N 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229910052750 molybdenum Inorganic materials 0.000 claims description 3
- 239000011733 molybdenum Substances 0.000 claims description 3
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 claims description 3
- 229920000767 polyaniline Polymers 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- 229920000128 polypyrrole Polymers 0.000 claims description 3
- 229920000123 polythiophene Polymers 0.000 claims description 3
- KCTAWXVAICEBSD-UHFFFAOYSA-N prop-2-enoyloxy prop-2-eneperoxoate Chemical compound C=CC(=O)OOOC(=O)C=C KCTAWXVAICEBSD-UHFFFAOYSA-N 0.000 claims description 3
- 239000011241 protective layer Substances 0.000 claims description 3
- 239000004973 liquid crystal related substance Substances 0.000 description 14
- 230000000694 effects Effects 0.000 description 11
- 230000009286 beneficial effect Effects 0.000 description 9
- 230000009471 action Effects 0.000 description 5
- 239000003086 colorant Substances 0.000 description 5
- 230000005684 electric field Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910021417 amorphous silicon Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- -1 for example Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Images
Classifications
-
- 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
- G02F1/15—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 an electrochromic effect
-
- 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
- G02F1/15—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 an electrochromic effect
- G02F1/153—Constructional details
- G02F1/155—Electrodes
-
- 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
- G02F1/15—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 an electrochromic effect
- G02F1/153—Constructional details
- G02F1/157—Structural association of cells with optical devices, e.g. reflectors or illuminating devices
Abstract
The embodiment of the application provides a display panel, a driving method thereof and a display device. The display panel includes a substrate base plate; a plurality of pixel units disposed on the substrate, the pixel units including a first electrode, a thin film transistor, and a second electrode connected to the thin film transistor; the reflecting layer is arranged on one side of the pixel unit, which is far away from the substrate base plate, and is used for reflecting external light; the electrochromic layer is arranged on one side, far away from the substrate, of the reflecting layer; a plurality of third electrodes disposed on a side of the electrochromic layer away from the substrate, the electrochromic layer disposed between the third electrodes and the second electrodes.
Description
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a display panel, a driving method thereof, and a display device.
Background
Currently, with the development of display manufacturing technology, the development of display technology is rapid, for example, lcd (liquid Crystal display) display and OLED (Organic Light-Emitting Diode) display.
The total reflection display screen has the advantages of cost saving, power saving, eye protection and the like because an external light source is not needed, and therefore the total reflection display screen is widely applied to the fields of electronic tags (ESL), small game machines, intelligent watches and the like. However, since the display is realized by using the ambient light, when the display screen displays the screen, some ambient light may also leak out of the non-display area, which causes the contrast of the current total reflection display screen to be low, thereby affecting the display effect.
Disclosure of Invention
An object of the present invention is to provide a display panel, a driving method thereof and a display device, so as to improve a contrast ratio of the display panel, and further improve a display effect. The specific technical scheme is as follows:
a first aspect of the present application provides a display panel, which includes a substrate base; a plurality of pixel units disposed on the substrate, the pixel units including a first electrode, a thin film transistor, and a second electrode connected to the thin film transistor; the reflecting layer is arranged on one side of the pixel unit, which is far away from the substrate base plate, and is used for reflecting external light; the electrochromic layer is arranged on one side, far away from the substrate, of the reflecting layer; a plurality of third electrodes disposed on a side of the electrochromic layer away from the substrate, the electrochromic layer disposed between the third electrodes and the second electrodes.
This application is through setting up electrochromic layer and a plurality of third electrode to can realize dividing the state of regional control electrochromic layer. The voltage of the third electrode and the second electrode may control the state of the electrochromic layer. When a forward voltage is applied to one of the third electrodes and the second electrode, the electrochromic layer between the third electrode and the second electrode at the position is in a non-transparent state, so that external ambient light cannot penetrate through the electrochromic layer in the non-transparent state, and the brightness of a dark-state display area on the display panel is favorably reduced. When a negative voltage is applied or no pressurization is applied to the other third electrode and the second electrode, the electrochromic layer between the third electrode and the second electrode at the position is in a light-transmitting state, so that external ambient light can transmit the electrochromic layer in the light-transmitting state, and the brightness of a bright-state display area on the display panel can be improved. Therefore, the embodiment of the application can realize that the display panel displays the bright-state display area and the dark-state display area in different areas, and is favorable for improving the contrast and the display effect of the display panel.
The display panel according to the embodiment of the application also has the technical characteristics of the following accessories:
in some embodiments of the present application, the display panel further includes a convex lens layer located on a side of the third electrode away from the substrate base plate, and a surface of the convex lens layer facing away from the substrate base plate has a convex portion.
In some embodiments of the present application, a surface of the reflective layer facing away from the substrate base plate has a concave portion, and the concave portion and the convex portion are disposed opposite to each other in a thickness direction of the display panel.
In some embodiments of the present application, a cross-section of the convex portion away from an edge line of the substrate base plate is shaped as a circular arc or a parabola.
In some embodiments of the present application, the display panel further includes a color filter substrate disposed opposite to the substrate, the color filter substrate includes a second substrate, a filter layer disposed on one side of the second substrate close to the substrate, a light shield layer, and a fourth electrode disposed on one side of the filter layer away from the second substrate, and the filter layer and the pixel unit are disposed opposite to each other in a thickness direction of the display panel.
In some embodiments of the present application, the convex portion, the concave portion, and the filter layer are disposed opposite to each other in a thickness direction of the display panel.
In some embodiments of the present application, an orthogonal projection of each of the third electrodes on the substrate covers two adjacent rows of four pixel units, and two adjacent third electrodes are separated by an orthogonal projection of the light shielding layer on the substrate.
In some embodiments of the present application, the material of the electrochromic layer comprises at least one of polypyrrole, polyaniline, polythiophene, metal phthalocyanine, viologen.
In some embodiments of the present application, the material of the lenticular layer comprises urethane acrylate, epoxy acrylate, or polyester acrylate.
In some embodiments of the present application, the material of the reflective layer comprises gold, silver, aluminum, molybdenum, or copper.
In some embodiments of the present application, the thin film transistor includes a gate electrode, a gate insulating layer, an active layer, a source electrode, and a drain electrode electrically connected to the second electrode, and the pixel unit further includes a protective layer disposed between the first electrode and the second electrode.
A second aspect of the present application provides a driving method of a display panel, for driving the display panel of the first aspect, the driving method comprising:
when a dark state display area and a bright state display area are generated on the display panel, the electrochromic layer in the dark state display area is controlled to be light-tight, and the electrochromic layer in the bright state display area is controlled to be light-tight.
In some embodiments of the present application, a control signal for controlling the electrochromic layer is input during two adjacent frame display times.
A third aspect of the application provides a display device comprising the display panel of the first aspect.
Of course, it is not necessary for any product or method of the present application to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present application, and other embodiments can be obtained by those skilled in the art according to the drawings.
FIG. 1 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure;
FIG. 2 is a schematic structural diagram of a pixel unit of a display panel according to an embodiment of the present disclosure;
FIG. 3 is a schematic view illustrating light propagation of a display panel according to an embodiment of the present disclosure;
FIG. 4 is a timing diagram illustrating time sharing control according to an embodiment of the present application;
FIG. 5 is a schematic view of another structure of a display panel according to an embodiment of the present disclosure;
FIG. 6 is a schematic view of another structure of a display panel according to an embodiment of the present disclosure;
fig. 7 is a schematic top view illustrating a third electrode and a pixel unit according to an embodiment of the disclosure.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the description herein are intended to be within the scope of the present disclosure.
At present, the total reflection type display device has great market potential in the fields of intelligent retail, electronic tags, electronic books and the like due to the advantages of low power consumption, low cost, capability of realizing multiple colors and the like. The total reflection type display device does not need to arrange a backlight source inside, and adopts film layers such as a polaroid, an optical wave plate, a liquid crystal layer, a reflecting layer and the like to reflect by using external environment light so as to realize color display. The structure has the advantages that the backlight source can be eliminated, thereby being beneficial to saving energy and reducing power consumption. However, since the display is realized by using the ambient light, some ambient light may leak out of the non-display area, so that the contrast of the current total reflection display device is low.
Based on the above problems, the present application provides a display panel, a driving method thereof, and a display device, so as to effectively improve the contrast of the display device.
The present application proposes, in a first aspect, a display panel 10. As shown in fig. 1 and 2, the display panel 10 includes a substrate 100, a plurality of pixel units 110, a reflective layer 120, an electrochromic layer 130, and a plurality of third electrodes 140. A plurality of pixel units 110 are disposed on the substrate 100, as shown in fig. 2, which is a partial schematic view of one pixel unit 110 of the display panel. The pixel unit 110 includes a first electrode 111, a thin film transistor 112, and a second electrode 113 connected to the thin film transistor 112. The reflective layer 120 is disposed on a side of the pixel unit 110 away from the substrate 100, and the reflective layer 120 is used for reflecting external light. The electrochromic layer 130 is disposed on a side of the reflective layer 120 away from the base substrate 100. The third electrode 140 is disposed on a side of the electrochromic layer 130 away from the base substrate 100, and the electrochromic layer 130 is disposed between the third electrode 140 and the second electrode 113.
The substrate 100 is a base of the display panel 10 and is typically made of glass. The pixel unit 110 is a minimum unit for display. A Thin-film transistor 112 (TFT) is an insulated gate field effect transistor, which is a key device in a display and is formed by stacking a layer of Thin films. Each pixel unit 110 is driven by a thin film transistor 112 integrated on the pixel unit 110, so that screen information can be displayed at high speed. In the present application, the substrate 100 further has a storage electrode, i.e. a first electrode 111, and the first electrode 111 and the second electrode 113 can form a storage capacitor therebetween, so that the charging voltage of the display panel 10 can be maintained until the next picture is updated.
The electrochromic layer 130 refers to a layer structure formed of an electrochromic material, and the electrochromic layer refers to a phenomenon in which optical properties of the material, such as reflectance, transmittance, and absorption, undergo a stable and reversible color change under the action of an applied electric field, and shows reversible changes in color and transparency in appearance. Under the action of an applied electric field, the electrochromic layer 130 can achieve two states, a transparent state and an opaque state. Specifically, in the embodiment of the present application, the electrochromic layer 130 is disposed between the third electrode 140 and the second electrode 113, and a voltage formed between the third electrode 140 and the second electrode 113 may control the electrochromic layer 130 to be in different states. That is, the second electrode 113 may be used to form a control voltage with the third electrode 140, and when a forward voltage is applied between the third electrode 140 and the second electrode 113, the electrochromic layer 130 may be controlled to be in a non-transparent state; when a negative voltage or no voltage is applied between the third electrode 140 and the second electrode 113, the electrochromic layer 130 may be in a light-transmitting state.
By arranging the electrochromic layer 130 and the plurality of third electrodes 140, the state of the electrochromic layer 130 can be controlled in different areas, and the contrast of the display panel 10 can be improved. Specifically, in the embodiment of the present application, as shown in fig. 1, the third electrode 140 has a plurality of electrodes, and is located on the electrochromic layer 130, and the electrochromic layer 130 is located between the third electrode 140 and the second electrode 113. The voltages of the third electrode 140 and the second electrode 113 may control the state of the electrochromic layer 130. For example, as shown in fig. 3, referring to fig. 1 and fig. 2, when a forward voltage is applied to one of the third electrodes 140 and the second electrode 113, the electrochromic layer 130 between the third electrode 140 and the second electrode 113 at this position is in a non-transparent state, so that the external ambient light a cannot penetrate through the electrochromic layer 130 in the non-transparent state and is not reflected by the reflective layer 120 below, thereby being beneficial to reducing the brightness of the dark display area on the display panel 10. The dark state display region is a region in which ambient light is not required in the display screen. Further, when a negative voltage is applied or no voltage is applied to the other third electrode 140 and the second electrode 113, the electrochromic layer 130 between the third electrode 140 and the second electrode 113 in this position is in a light-transmitting state, so that the external ambient light B can be reflected by the reflective layer 120 under the electrochromic layer 130 in the light-transmitting state, and the brightness of the bright-state display area on the display panel 10 can be improved. The bright display area is an area of the display screen that requires ambient light. Therefore, the embodiment of the application can realize that the display panel 10 displays the bright state display area and the dark state display area in different areas, so that the brightness of the display area which should not be transparent is lower, the brightness of the display area which needs to be transparent is higher, and the contrast and the display effect of the display panel 10 are improved.
In some embodiments, in order to reduce the influence of the third electrode 140 on the liquid crystal deflection signal above the electrochromic layer 130, a time-sharing control manner may be adopted. As shown in fig. 4, a timing diagram of time-sharing control is shown, where M is exemplified by liquid crystal deflection signal timing and N is exemplified by electrochromic layer control signal timing. Since the electrochromic layer 130 can maintain the new state for a certain time after being excited by the voltage, the state of the electrochromic layer 130 can be controlled by inputting the control voltage of the third electrode 140 during the blank signal time P between two frames of the display. Thus, the electrochromic layer 130 can be maintained in the same state without affecting the liquid crystal deflection signal, which is advantageous for improving the display effect.
In some embodiments of the present application, as shown in fig. 5, the display panel 10 further includes a convex lens layer 150 located on a side of the third electrode 140 away from the substrate 100, and a surface of the convex lens layer 150 facing away from the substrate 100 has a convex portion 151. The present application further provides a convex lens layer 150 above the third electrode 140, and the convex lens has a converging effect on the light C. Thus, the external light C is favorably converged by the convex lens layer 150, so that the utilization rate of the external ambient light is favorably improved, the brightness of the display panel 10 is improved, and the power consumption of the display panel 10 is reduced. In addition, because the light is collected, the brightness of the bright display area on the display panel 10 is larger, which is further beneficial to improving the contrast of the display panel 10 and improving the display effect.
Further, the shape of the edge line of the cross section of the convex portion 151 away from the substrate base plate 100 is a circular arc or a parabola. The parameters of the convex portion 151 having such a shape are determined, which is advantageous for achieving the curvature radius and the focal length of the convex portion 151 by controlling the process parameters, thereby achieving the desired optical effect and achieving a more excellent display effect.
As shown in fig. 6, in some embodiments of the present application, a surface of the reflective layer 120 facing away from the substrate base plate 100 has a concave portion 121, and the concave portion 121 and the convex portion 151 are disposed opposite to each other in a thickness direction of the display panel 10. The cross section of the concave portion 121 of the present application may have a circular arc or a parabolic shape near the edge of the substrate base plate 100. By arranging the concave portion 121, the external ambient light D can be favorably converged by concave reflection, and the utilization rate of light can be favorably improved. Further, the concave portion 121 and the convex portion 151 are disposed opposite to each other in the thickness direction of the display panel 10, that is, the concave portion 121 and the convex portion 151 overlap with each other in the orthographic projection of the base substrate 100, and may even completely overlap. Thus, the light is converged twice at the same time, which is beneficial to further improving the utilization rate of the light, thereby improving the brightness of the display panel 10 and reducing the power consumption. In addition, because the light is collected, the brightness of the bright display area on the display panel 10 is larger, which is further beneficial to improving the contrast of the display panel 10 and improving the display effect.
As shown in fig. 6, in some embodiments of the present disclosure, the display panel 10 further includes a color filter substrate 200 disposed opposite to the substrate 100, the color filter substrate 200 includes a second substrate 210, a filter layer 220 disposed on a side of the second substrate 210 close to the substrate 100, a light shielding layer 230, and a fourth electrode 240 disposed on a side of the filter layer 220 away from the second substrate 210, and the filter layer 220 and the pixel unit 110 are disposed opposite to each other in a thickness direction of the display panel 10. The color filter substrate 200 is a key component for realizing colorization of the liquid crystal panel, and the principle thereof is that a light shielding layer 230, a filter layer 220 and the like are coated on the second substrate 210 through processes such as pigment dispersion and the like, and white light is filtered into three basic pigment lattices of red, green and blue to realize color display. The second substrate 210 may be a glass substrate. The filter layer 220 is a color filter film composed of three basic colors of red, green, and blue, which is regularly distributed on the second substrate 210, and generates three colors of red (R), green (G), and blue (B) by using a principle of filtering light, and the three colors are mixed according to different kinds to generate various colors. The light-shielding layer 230, i.e., the black matrix, is located between the plurality of filter layers 230, and is used for dividing adjacent color displays, shielding color gaps, and preventing light leakage or color mixing. The filter layer 220 and the pixel unit 110 are disposed opposite to each other in the thickness direction of the display panel 10, that is, there is an overlap between the projections of the two on the substrate 100, so that light can conveniently penetrate from the pixel unit 110 to the filter layer 230, and is not shielded by the light shielding layer 230, which is beneficial to improving the light transmittance. A liquid crystal layer 400 is usually further included between the substrate 100 and the color filter substrate 200, which is not described herein.
In this embodiment, as shown in fig. 1 and fig. 2, the color filter substrate 200 further includes a fourth electrode 240, and the second electrode 113 is overlapped with the reflective layer 120 through a via hole 1131. Thus, an interplate capacitance is formed between the fourth electrode 240 and the reflective layer 120 overlapping the second electrode 113, thereby controlling liquid crystal deflection. That is to say, the display panel 10 of the embodiment of the present application may be a TN type display panel, which has the advantages of fast response speed and low cost.
In other embodiments, the display panel 10 may also be an ADS (Advanced Super Dimension Switch) type panel. The color filter substrate 200 may not be provided with the fourth electrode 240, the first electrode 111 and the second electrode 113 on the substrate 100 are located on different layers, one of the electrodes is a slit electrode, and the other electrode is a plate electrode, and the slit electrode is closer to the liquid crystal layer than the plate electrode. The display panel 10 with such a structure forms a multi-dimensional electric field by the electric field generated by the edges of the slit electrodes in the same plane and the electric field generated between the slit electrodes and the plate-shaped electrodes, so that all the oriented liquid crystal molecules between the slit electrodes and right above the electrodes in the liquid crystal box can rotate, thereby facilitating the improvement of the working efficiency of the liquid crystal and the increase of the light transmission efficiency.
In some embodiments of the present application, as shown in fig. 6, the convex portion 151 and the concave portion 121 are disposed opposite to the filter layer 220 in the thickness direction of the display panel 10, that is, there is an overlap between the convex portion 151 and the concave portion 121 and an orthographic projection of the filter layer 220 on the substrate 100. This configuration is advantageous in facilitating reflection of external light secondarily collected by the convex portion 151 and the concave portion 121 onto the filter layer 220, thereby facilitating improvement of light utilization efficiency and display luminance.
In some embodiments of the present application, as shown in fig. 7, an orthogonal projection 140 'of each third electrode 140 on the substrate 100 covers two adjacent rows of four pixel units 110, and two adjacent third electrodes 140 are separated by an orthogonal projection 230' of the light shielding layer 230 on the substrate 100. The orthographic projection 140' of each third electrode 140 on the substrate 100 can cover different numbers of pixel units 110, so as to divide the area of the pixel units 110 on the substrate 100. In the embodiment of the present application, the orthographic projection 140' of each third electrode 140 covers two adjacent rows of four pixel units 110, that is, the four pixel units 110 are grouped into one group, and whether they are in the light-transmitting area is controlled by the one third electrode 140 above it. Moreover, the two adjacent groups of pixel units 110 may be both in the transparent region or in the opaque region. For example, four pixel units 110 are defined as a first group, and when a forward voltage is applied between the third electrode 140 and the second electrode 113 on the first group, the electrochromic layer 130 in the middle is in a non-transparent state, so that the region where the first group is located is the non-transparent region. Defining another four pixel units 110 adjacent to the four pixel units 110 as a second group, wherein when a forward voltage is applied between the third electrode 140 and the second electrode 113 on the second group, the area where the second group is located is also an opaque area, and the first group and the second group are in the same state; when a negative voltage or no voltage is applied between the third electrode 140 and the second electrode 113 on the second group, the region where the second group is located is a light-transmitting region, and the first group and the second group are in different states. Therefore, the display panel 10 can be controlled to display the bright-state display area and the dark-state display area in a divided area with every four pixel units 110 as a group, and the contrast of the display panel 10 is further improved. It will be readily appreciated that the orthographic projection 140' of each third electrode 140 may also cover 2 pixel cells 110, 8 pixel cells 110 or more pixel cells 110, the main difference being that the area of the smallest area that is realized to be light transmissive or non-transmissive is varied. Of course, the less pixel units 110 are covered by the orthographic projection 140' of each third electrode 140, the more finely the control of the subareas thereof is. However, the technical difficulty in implementation is increased, which is not favorable for the yield. Therefore, in the embodiment of the present application, each third electrode 140 preferably covers two adjacent rows of four pixel units 110, so as to implement a finer split-area control strategy while ensuring the production yield.
In some embodiments of the present application, the material of the electrochromic layer 130 includes at least one of polypyrrole, polyaniline, polythiophene, metal phthalocyanine, viologen. The material of the electrochromic layer 130 may be various, and one skilled in the art can select at least one of the above materials in consideration of the cost and the implementation difficulty. Of course, the material of the electrochromic layer 130 is not limited to the above-mentioned ones, as long as the electrochromic characteristics can be satisfied.
In some embodiments of the present application, the material of the lenticular lens layer 150 includes urethane acrylate, epoxy acrylate, or polyester acrylate. The material of the lenticular lens layer 150 may be various, and one skilled in the art can select at least one of the above materials in consideration of the cost and the implementation difficulty. Of course, the material of the lenticular lens layer 150 is not limited to the above.
In some embodiments of the present application, the material of the reflective layer 120 includes gold, silver, aluminum, molybdenum, or copper. The reflective layer 120 may be made of various materials, and the reflective layer 120 made of the above materials has a high reflectivity, and one skilled in the art can select at least one of the above materials in consideration of the cost and the implementation difficulty. Of course, the material of the reflective layer 120 is not limited to the above.
In some embodiments of the present application, as shown in fig. 2, the thin film transistor 112 includes a gate electrode 1121, a gate insulating layer 1122, an active layer 1123, a source electrode 1124 and a drain electrode 1125, the drain electrode 1125 is electrically connected to the second electrode 113, and the pixel unit 110 further includes a protective layer 114 disposed between the first electrode 111 and the second electrode 113. The thin film transistor 112 is a driving component of the pixel unit 110, a gate insulating layer 1122 is included between the active layer 1123 and the gate Electrode 1121, a Drain Electrode (Drain Electrode)1125 and a Source Electrode (Source Electrode)1124 are disposed on a side of the active layer 1123 away from the gate insulating layer 160, and the Drain Electrode 1125 and the Source Electrode 1124 are disposed at the same layer. The active layer 1123 is made of a semiconductor material, and may be, for example, amorphous silicon, polysilicon, an organic semiconductor material, or the like, which is not limited herein. The source and drain electrodes 1124 and 1125 may include any of various types of metal materials, for example, silver (Ag), copper (Cu), and aluminum (Al). In some embodiments, the gate 1121 is located on a side of the active layer 1123 facing away from the substrate 100, i.e., a top gate structure; in other embodiments, the gate 1121 is located on a side of the active layer 1123 close to the substrate 100, i.e., a bottom gate structure, which is not limited in this application. In some embodiments, the thin film transistor 112 may further include an interlayer insulating layer or the like. It should be noted that the structure of the thin film transistor 112 is not limited thereto, and may be determined according to actual requirements. In some embodiments, as shown in fig. 2, the pixel unit 110 further includes a planarization layer 115 covering the second electrode 113, which is advantageous for achieving planarization of the display panel 10.
A second aspect of the present application provides a driving method of a display panel 10, for driving the display panel 10 of the first aspect, the driving method comprising:
when a dark state display region and a bright state display region are generated on the display panel 10, the electrochromic layer 130 in the dark state display region is controlled to be opaque, and the electrochromic layer 130 in the bright state display region is controlled to be transparent.
The driving method of the present embodiment illustrates how to implement the divisional control of the state of the electrochromic layer 130 to improve the contrast of the display panel 10. Specifically, as shown in fig. 3, when a dark-state display region and a bright-state display region are generated on the display panel 10, a forward voltage is applied between the third electrode 140 and the second electrode 113 in the dark-state display region, and the electrochromic layer 130 located therebetween is in a non-transparent state. At this time, the ambient light a cannot be reflected by the reflective layer 120, so that no light leaks out from the dark display region; when a negative voltage or no voltage is applied between the third electrode 140 and the second electrode 113 in the bright display region, the electrochromic layer 130 located therebetween is in a light-transmitting state. At this time, the ambient light B may be reflected by the reflective layer 120 and transmitted through the display panel 10, so that the bright display region displays normal color, thereby being beneficial to improving the contrast of the whole region of the display panel 10.
In some embodiments of the present application, the control signal for controlling the electrochromic layer 130 is input during the display time of two adjacent frames. In order to reduce the influence of the third electrode 140 on the liquid crystal deflection signal above the electrochromic layer 130, the driving method of the present embodiment is time-sharing control. Specifically, as shown in fig. 4, since the electrochromic layer 130 may maintain a new state for a certain time after being excited by a voltage, a control voltage of the third electrode 140 is input during a blank signal time in two adjacent frame display times to control the state of the electrochromic layer 130. Thus, the electrochromic layer 130 can be maintained in the same state without affecting the liquid crystal deflection signal, which is advantageous for improving the display effect.
A third aspect of the present application proposes a display device comprising the display panel 10 of the first aspect. The display device uses the display panel 10 according to the first aspect, which is beneficial to improving the contrast ratio of the display device, and is further beneficial to improving the display effect.
It is noted that in the drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. Also, it will be understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element or layer or intervening layers may also be present. In addition, it will be understood that when an element or layer is referred to as being "under" another element or layer, it can be directly under the other element or intervening layers or elements may be present. In addition, it will also be understood that when a layer or element is referred to as being "between" two layers or elements, it can be the only layer between the two layers or elements, or more than one intermediate layer or element may also be present. Like reference numerals refer to like elements throughout.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The above description is only for the preferred embodiment of the present application, and is not intended to limit the scope of the present application. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application are included in the protection scope of the present application.
Claims (14)
1. A display panel, comprising:
a substrate base plate;
a plurality of pixel units disposed on the substrate, the pixel units including a first electrode, a thin film transistor, and a second electrode connected to the thin film transistor;
the reflecting layer is arranged on one side of the pixel unit, which is far away from the substrate base plate, and is used for reflecting external light;
the electrochromic layer is arranged on one side, far away from the substrate, of the reflecting layer;
a plurality of third electrodes disposed on a side of the electrochromic layer away from the substrate, the electrochromic layer disposed between the third electrodes and the second electrodes.
2. The display panel according to claim 1, further comprising a convex lens layer on a side of the third electrode facing away from the substrate base plate, wherein a surface of the convex lens layer facing away from the substrate base plate has a convex portion.
3. The display panel according to claim 2, wherein a surface of the reflective layer on a side facing away from the substrate base plate has a concave portion, and the concave portion and the convex portion are disposed opposite to each other in a thickness direction of the display panel.
4. The display panel according to claim 2, wherein a cross section of the convex portion away from an edge line of the substrate base plate is shaped as a circular arc or a parabola.
5. The display panel according to claim 3, further comprising a color filter substrate disposed opposite to the substrate, wherein the color filter substrate comprises a second substrate, a filter layer disposed on one side of the second substrate close to the substrate, an opaque layer, and a fourth electrode disposed on one side of the filter layer away from the second substrate, and the filter layer and the pixel unit are disposed opposite to each other in a thickness direction of the display panel.
6. The display panel according to claim 5, wherein the convex portion, the concave portion, and the filter layer are provided so as to be opposed to each other in a thickness direction of the display panel.
7. The display panel according to claim 5, wherein an orthogonal projection of each of the third electrodes on the substrate covers two adjacent rows of four pixel units, and two adjacent third electrodes are separated by an orthogonal projection of the light shielding layer on the substrate.
8. The display panel according to claim 1, wherein the material of the electrochromic layer comprises at least one of polypyrrole, polyaniline, polythiophene, metal phthalocyanine, and viologen.
9. The display panel of claim 2, wherein the material of the lenticular layer comprises urethane acrylate, epoxy acrylate, or polyester acrylate.
10. The display panel according to claim 3, wherein the material of the reflective layer comprises gold, silver, aluminum, molybdenum, or copper.
11. The display panel according to claim 1, wherein the thin film transistor includes a gate electrode, a gate insulating layer, an active layer, a source electrode, and a drain electrode, wherein the drain electrode is electrically connected to the second electrode, and wherein the pixel unit further includes a protective layer disposed between the first electrode and the second electrode.
12. A driving method of a display panel for driving the display panel according to any one of claims 1 to 11, comprising:
when a dark state display area and a bright state display area are generated on the display panel, the electrochromic layer in the dark state display area is controlled to be light-tight, and the electrochromic layer in the bright state display area is controlled to be light-tight.
13. The driving method according to claim 12, wherein the control signal for controlling the electrochromic layer is input during the display time of two adjacent frames.
14. A display device characterized by comprising the display panel according to any one of claims 1 to 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210519151.2A CN114721196B (en) | 2022-05-12 | 2022-05-12 | Display panel, driving method thereof and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210519151.2A CN114721196B (en) | 2022-05-12 | 2022-05-12 | Display panel, driving method thereof and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114721196A true CN114721196A (en) | 2022-07-08 |
| CN114721196B CN114721196B (en) | 2023-12-15 |
Family
ID=82231294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210519151.2A Active CN114721196B (en) | 2022-05-12 | 2022-05-12 | Display panel, driving method thereof and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114721196B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115167020A (en) * | 2022-07-27 | 2022-10-11 | 京东方科技集团股份有限公司 | Display panel and display device |
Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06294954A (en) * | 1993-04-07 | 1994-10-21 | Seiko Epson Corp | Reflection type display device |
| JPH11337717A (en) * | 1998-05-21 | 1999-12-10 | Seiko Epson Corp | Color filter substrate and reflection type liquid crystal display using this substrate |
| JP2002131741A (en) * | 2000-10-26 | 2002-05-09 | Fujikura Ltd | Reflection type liquid crystal display device |
| US20030137623A1 (en) * | 1998-10-20 | 2003-07-24 | Kazuto Noritake | Reflection type liquid crystal display |
| JP2003248181A (en) * | 2002-02-25 | 2003-09-05 | Ricoh Co Ltd | Reflective spatial light modulator |
| JP2006267828A (en) * | 2005-03-25 | 2006-10-05 | Ricoh Co Ltd | Electrochromic display element |
| CN101341438A (en) * | 2005-12-20 | 2009-01-07 | 夏普株式会社 | Display device and liquid crystal display device |
| US20090066880A1 (en) * | 2007-09-07 | 2009-03-12 | Hitachi Displays, Ltd. | Liquid crystal display device |
| KR20110119455A (en) * | 2010-04-27 | 2011-11-02 | 삼성전자주식회사 | Display device |
| CN102301274A (en) * | 2009-09-04 | 2011-12-28 | Sk电信有限公司 | Reflective Display Device Having Electrochromic Filter |
| CN102629048A (en) * | 2011-07-13 | 2012-08-08 | 京东方科技集团股份有限公司 | Liquid crystal display panel and driving method thereof |
| CN103413495A (en) * | 2013-07-17 | 2013-11-27 | 京东方科技集团股份有限公司 | Display device |
| CN104678641A (en) * | 2015-03-17 | 2015-06-03 | 京东方科技集团股份有限公司 | Color filter substrate, production method thereof and display device |
| CN107340663A (en) * | 2017-08-04 | 2017-11-10 | 京东方科技集团股份有限公司 | Light modulation device and preparation method thereof, backlight assembly, display device |
| CN109976027A (en) * | 2019-04-30 | 2019-07-05 | 京东方科技集团股份有限公司 | A kind of display panel, display device and its driving method |
| CN110676300A (en) * | 2019-10-30 | 2020-01-10 | 武汉天马微电子有限公司 | Display panel, driving method thereof and display device |
| CN111273479A (en) * | 2020-03-27 | 2020-06-12 | 京东方科技集团股份有限公司 | Display panel and display device |
| CN215813643U (en) * | 2021-08-04 | 2022-02-11 | 昆山龙腾光电股份有限公司 | Display panel and display device |
-
2022
- 2022-05-12 CN CN202210519151.2A patent/CN114721196B/en active Active
Patent Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06294954A (en) * | 1993-04-07 | 1994-10-21 | Seiko Epson Corp | Reflection type display device |
| JPH11337717A (en) * | 1998-05-21 | 1999-12-10 | Seiko Epson Corp | Color filter substrate and reflection type liquid crystal display using this substrate |
| US20030137623A1 (en) * | 1998-10-20 | 2003-07-24 | Kazuto Noritake | Reflection type liquid crystal display |
| JP2002131741A (en) * | 2000-10-26 | 2002-05-09 | Fujikura Ltd | Reflection type liquid crystal display device |
| JP2003248181A (en) * | 2002-02-25 | 2003-09-05 | Ricoh Co Ltd | Reflective spatial light modulator |
| JP2006267828A (en) * | 2005-03-25 | 2006-10-05 | Ricoh Co Ltd | Electrochromic display element |
| CN101341438A (en) * | 2005-12-20 | 2009-01-07 | 夏普株式会社 | Display device and liquid crystal display device |
| US20090066880A1 (en) * | 2007-09-07 | 2009-03-12 | Hitachi Displays, Ltd. | Liquid crystal display device |
| CN102301274A (en) * | 2009-09-04 | 2011-12-28 | Sk电信有限公司 | Reflective Display Device Having Electrochromic Filter |
| KR20110119455A (en) * | 2010-04-27 | 2011-11-02 | 삼성전자주식회사 | Display device |
| CN102629048A (en) * | 2011-07-13 | 2012-08-08 | 京东方科技集团股份有限公司 | Liquid crystal display panel and driving method thereof |
| CN103413495A (en) * | 2013-07-17 | 2013-11-27 | 京东方科技集团股份有限公司 | Display device |
| CN104678641A (en) * | 2015-03-17 | 2015-06-03 | 京东方科技集团股份有限公司 | Color filter substrate, production method thereof and display device |
| CN107340663A (en) * | 2017-08-04 | 2017-11-10 | 京东方科技集团股份有限公司 | Light modulation device and preparation method thereof, backlight assembly, display device |
| CN109976027A (en) * | 2019-04-30 | 2019-07-05 | 京东方科技集团股份有限公司 | A kind of display panel, display device and its driving method |
| CN110676300A (en) * | 2019-10-30 | 2020-01-10 | 武汉天马微电子有限公司 | Display panel, driving method thereof and display device |
| CN111273479A (en) * | 2020-03-27 | 2020-06-12 | 京东方科技集团股份有限公司 | Display panel and display device |
| CN215813643U (en) * | 2021-08-04 | 2022-02-11 | 昆山龙腾光电股份有限公司 | Display panel and display device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115167020A (en) * | 2022-07-27 | 2022-10-11 | 京东方科技集团股份有限公司 | Display panel and display device |
| CN115167020B (en) * | 2022-07-27 | 2023-10-20 | 京东方科技集团股份有限公司 | Display panel and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114721196B (en) | 2023-12-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101299106B (en) | Color filter substrate and liquid crystal display panel containing the same | |
| TWI554808B (en) | Liquid crystal display panel and liquid crystal display device | |
| US7580092B2 (en) | Liquid crystal display device and method for fabricating the same | |
| CN101276087B (en) | Liquid crystal display device | |
| CN100585459C (en) | Transreflective liquid crystal display | |
| EP1267198B1 (en) | Transflective electro-optical device | |
| US10816866B2 (en) | Reflective electrochromic display panel | |
| US7161646B2 (en) | Liquid crystal device and electronic apparatus provided with the same | |
| JP2011013677A (en) | Liquid crystal display and method of manufacturing the same | |
| US20070146593A1 (en) | Liquid crystal display | |
| CN1794054B (en) | Liquid crystal display device and fabricating method thereof | |
| US20040252262A1 (en) | Transflective liquid crystal display device | |
| US9122090B2 (en) | Transparent display device | |
| CN114721196B (en) | Display panel, driving method thereof and display device | |
| US20190064616A1 (en) | Transflective liquid crystal display | |
| US20190049801A1 (en) | Transflective liquid crystal display device | |
| CN101916006A (en) | Liquid crystal display device | |
| CN110297366A (en) | A kind of display panel and driving method, display device and driving method | |
| CN1624532A (en) | Reflective biscreen liquid crystal display panel | |
| KR100975461B1 (en) | Liquid crystal display unit | |
| CN109828405B (en) | Color film substrate and manufacturing method thereof, display panel and display device | |
| CN101989008B (en) | Transflective liquid crystal display | |
| CN217879901U (en) | Mirror reflection liquid crystal display panel and liquid crystal display | |
| KR20130055205A (en) | Driving method of liquid crystal display device including cholesteric liquid crystal layer | |
| US11049910B2 (en) | Pixel structure and display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |