CN112786671A - WOLED display panel - Google Patents
WOLED display panel Download PDFInfo
- Publication number
- CN112786671A CN112786671A CN202110034277.6A CN202110034277A CN112786671A CN 112786671 A CN112786671 A CN 112786671A CN 202110034277 A CN202110034277 A CN 202110034277A CN 112786671 A CN112786671 A CN 112786671A
- Authority
- CN
- China
- Prior art keywords
- sub
- pixel
- layer
- display panel
- color
- 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
- 239000000758 substrate Substances 0.000 claims abstract description 48
- 239000000463 material Substances 0.000 claims description 46
- 239000010409 thin film Substances 0.000 claims description 22
- 239000003792 electrolyte Substances 0.000 claims description 12
- 239000011347 resin Substances 0.000 claims description 5
- 229920005989 resin Polymers 0.000 claims description 5
- 150000003839 salts Chemical class 0.000 claims description 5
- 239000010408 film Substances 0.000 claims description 4
- 239000010410 layer Substances 0.000 description 129
- 239000003086 colorant Substances 0.000 description 13
- 238000000605 extraction Methods 0.000 description 6
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 229920001609 Poly(3,4-ethylenedioxythiophene) Polymers 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005538 encapsulation Methods 0.000 description 3
- 239000002346 layers by function Substances 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 229920001467 poly(styrenesulfonates) Polymers 0.000 description 3
- 239000007784 solid electrolyte Substances 0.000 description 3
- GKWLILHTTGWKLQ-UHFFFAOYSA-N 2,3-dihydrothieno[3,4-b][1,4]dioxine Chemical compound O1CCOC2=CSC=C21 GKWLILHTTGWKLQ-UHFFFAOYSA-N 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000005525 hole transport Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229920001940 conductive polymer Polymers 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 229960002796 polystyrene sulfonate Drugs 0.000 description 1
- 239000011970 polystyrene sulfonate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910001930 tungsten oxide Inorganic materials 0.000 description 1
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/50—OLEDs integrated with light modulating elements, e.g. with electrochromic elements, photochromic elements or liquid crystal elements
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electroluminescent Light Sources (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
A WOLED display panel is defined with a plurality of first sub-pixel areas, second sub-pixel areas, third sub-pixel areas and fourth sub-pixel areas, and comprises a first substrate, a light emitting layer arranged on the first substrate, a color resistance layer arranged on one side of a light emitting surface of the light emitting layer, and a plurality of electrochromic devices arranged on one side of the light emitting surface of the light emitting layer, wherein the light emitting layer comprises first sub-pixels positioned in the first sub-pixel areas, second sub-pixels positioned in the second sub-pixel areas, third sub-pixels positioned in the third sub-pixel areas, and fourth sub-pixels positioned in the fourth sub-pixel areas; the color resistance layer comprises a first color resistance, a second color resistance and a third color resistance which are in one-to-one correspondence with the first sub-pixel and the second sub-pixel; each electrochromic device corresponds to a fourth sub-pixel, and the electrochromic device automatically adjusts itself to be in a transparent state or have a color state along with different pictures to be displayed in the fourth sub-pixel area.
Description
Technical Field
The invention relates to the technical field of display, in particular to a WOLED display panel.
Background
The conventional White Organic Light-Emitting Diode (WOLED) display device utilizes a WOLED + CF (Color Filter) mode to realize full Color display, and White sub-pixels can be retained to improve the brightness of the display. In the field of large-size screen display, technologies such as WOLED + CF and OPEN MASK (OPEN MASK) are commonly used to fabricate OLED display devices.
For the display panel of WOLED + CF, each display pixel (pixel) thereof includes four sub-pixels, i.e., red (R), green (G), blue (B), and white (W) sub-pixels. Most of white light is reflected or absorbed when passing through the CF color resistor, and the light extraction efficiency is reduced by about 70% generally, so that the W sub-pixel is arranged, the corresponding CF has no color resistor, light is not required to be extracted through the color resistor, the light extraction efficiency can be improved, and the brightness of the display panel is improved.
WOLEDs are composite light emitting layers with multiple colors that each emit light of different colors, which are mixed together to form white light. Because the luminous efficiency of the luminous materials with different colors is different, the opening areas of the four sub-pixels in the WOLED are different, so that the light-emitting efficiency of the luminous material with lower luminous efficiency is improved. The panel resolution is affected due to the large difference between the maximum area and the minimum area of the sub-pixels with different colors, and the panel power consumption is increased by increasing the sub-pixel openings to improve the light extraction rate.
Therefore, the structure of the conventional WOLED display device needs to be improved.
Disclosure of Invention
Embodiments of the present invention provide a WOLED display panel, so as to solve the technical problems that in an existing WOLED display device, due to differences in opening areas of sub-pixels of different colors, the resolution of the panel is affected, and the light extraction rate is improved by increasing the opening areas of the sub-pixels, and the power consumption of the panel is also increased.
In order to solve the above problems, the technical scheme provided by the invention is as follows:
the embodiment of the invention provides a WOLED display panel, which is defined with a plurality of first sub-pixel areas, second sub-pixel areas, third sub-pixel areas and fourth sub-pixel areas. The first substrate comprises a first thin film transistor array; the light emitting layer comprises a plurality of pixels, and each pixel comprises a first sub-pixel positioned in the first sub-pixel area, a second sub-pixel positioned in the second sub-pixel area, a third sub-pixel positioned in the third sub-pixel area, and a fourth sub-pixel positioned in the fourth sub-pixel area; the color resistance layer comprises a first color resistance, a second color resistance and a third color resistance which are in one-to-one correspondence with the first sub-pixel, the second sub-pixel and the third sub-pixel; each electrochromic device corresponds to each fourth sub-pixel; the electrochromic device automatically adjusts the electrochromic device to be in a transparent state or have a color state along with different pictures to be displayed in the fourth sub-pixel area.
In an embodiment of the present invention, when the fourth sub-pixel area needs to display white light, the electrochromic device is in a transparent state, and when the fourth sub-pixel area needs to display non-white light, the electrochromic device is in a color state that is the same as the color of light that the fourth sub-pixel area needs to emit.
In one embodiment of the present invention, the electrochromic device includes a first electrode, a second electrode, and an electrochromic layer disposed between the first electrode and the second electrode.
In one embodiment of the present invention, the electrochromic layer includes an electrochromic material layer and an electrolyte layer disposed in a stack.
In one embodiment of the present invention, the electrochromic layer is a resin film layer doped with an electrochromic material and an electrolyte salt.
In an embodiment of the invention, the WOLED display panel further includes a second substrate and a second thin film transistor array, the second substrate is disposed opposite to the first substrate, and the second thin film transistor array controls the electrochromic device to display different color states.
In one embodiment of the present invention, the color resistance layer and the electrochromic device are disposed on a side of the second substrate facing the light emitting layer.
In an embodiment of the invention, the second thin film transistor array is disposed on the second substrate.
In an embodiment of the invention, the WOLED display panel is a top emission display panel, the color resist layer is disposed on a side of the second substrate facing the light emitting layer, and the electroluminescent device is disposed on a side of the light emitting layer facing the color resist layer.
In an embodiment of the invention, the second thin film transistor array is disposed on the first substrate.
The invention has the beneficial effects that: the electrochromic device corresponding to the fourth sub-pixel is additionally arranged, so that the white light emitted by the fourth sub-pixel can be used as a white light sub-pixel and can be converted into other sub-pixels with different light colors such as blue light or red light, the opening area of the blue sub-pixel or the red sub-pixel can be reduced, the light emitting efficiency of the WOLED display panel can be improved, the resolution of the WOLED display panel can be improved, the power consumption of the panel can be reduced, and the service life of the panel can be prolonged.
Drawings
Fig. 1 is a schematic structural diagram of a WOLED display panel according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a WOLED display panel according to another embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a WOLED display panel according to another embodiment of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.
Referring to fig. 1, an embodiment of the invention provides a White Organic Light-Emitting Diode (WOLED) display panel 100, where the WOLED display panel 100 includes a first substrate 10, a Light-Emitting layer 20 disposed on the first substrate 10, and a color-resist layer 40 disposed on a Light-Emitting surface side of the Light-Emitting layer 20. A first thin film transistor array (not shown) is disposed on the first substrate to drive the light emitting layer 20 to emit light. Since the light emitting layer 20 emits white light, in order to realize color display, a corresponding color resist layer 40 is required to be disposed on one side of the light emitting surface of the light emitting layer 20, so as to convert the white light of different sub-pixel regions into one of corresponding red, green and blue light.
The WOLED display panel 100 has a plurality of first sub-pixel regions 101, second sub-pixel regions 102, third sub-pixel regions 103, and fourth sub-pixel regions 104 defined thereon. Specifically, the first sub-pixel region 101, the second sub-pixel region 102, and the third sub-pixel region 103 are disposed adjacently and display different colors of light.
In one embodiment, the first sub-pixel region 101, the second sub-pixel region 102 and the third sub-pixel region 103 respectively display one of red, green and blue light.
The light emitting layer comprises a plurality of pixels, each pixel comprises a first sub-pixel 201, a second sub-pixel 202 and a third sub-pixel 203, the first sub-pixel 201 is located in the first sub-pixel area 101, the second sub-pixel 202 is located in the second sub-pixel area 102, and the third sub-pixel 203 is located in the third sub-pixel area 103.
The color resist layer 40 includes a first color resist 41, a second color resist 42, and a third color resist 43 corresponding to the first sub-pixel 201, the second sub-pixel 202, and the third sub-pixel one by one.
The colors of the first color resistor 41, the second color resistor 42 and the third color resistor 43 are different from each other.
In one embodiment, the first color resistor 41, the second color resistor 42 and the third color resistor 43 are each one of red, green and blue color resistors.
Specifically, for example, the first color resist 41 is a red color resist, the second color resist 42 is a green color resist, and the third color resist 43 is a blue color resist, but the invention is not limited thereto, and other combinations of color resists may be used.
Correspondingly, when white light emitted by different sub-pixels passes through the color resistance layer 40, the same color as the corresponding color resistance is displayed. That is, the first sub-pixel region 101 displays red light, the second sub-pixel region 102 displays green light, and the third sub-pixel region 103 displays blue light.
That is, the first sub-pixel 201 is a red sub-pixel, the second sub-pixel 202 is a green sub-pixel, and the third sub-pixel 203 is a blue sub-pixel.
In one embodiment, the color resist layer further includes a black matrix 44, and the black matrix 44 is disposed between adjacent color resists to prevent crosstalk between light beams emitted from adjacent sub-pixel regions, i.e., to avoid color mixing.
The color resistor is not disposed at a position corresponding to one side of the light emitting surface of the fourth sub-pixel 204, so that the fourth sub-pixel 204 can be a white sub-pixel, and the fourth sub-pixel region 104 can directly emit white light to improve the light emitting efficiency, thereby improving the display brightness of the image. WOLED display panels, however, are typically stacked OLED devices, the light-emitting layer 20 comprising a composite light-emitting material layer of multiple colors, typically a blue light-emitting material layer and a yellow light-emitting material layer stacked together to synthesize white light,
the light emitting layer 20 may include two stacked light emitting layers, that is, a blue light emitting material layer and a yellow light emitting material layer, and since the blue light emitting material has low light emitting efficiency and short lifetime, the opening area of the blue sub-pixel is designed to be larger than that of the red sub-pixel and the green sub-pixel, so as to improve the blue light emitting efficiency of the WOLED display panel 100.
The light emitting layer 20 may further include three stacked light emitting layers, that is, a blue light emitting material layer, a yellow light emitting material layer, and a blue light emitting material layer, which are sequentially stacked, and the light emitting efficiency of blue light is improved by adding one blue light emitting material layer, but this design may result in a weak light emitting efficiency of red light, and therefore the opening area of the red sub-pixel may be larger than that of the blue sub-pixel and the green sub-pixel.
No matter the design of two-fold luminescent layer or three-fold luminescent layer, the opening area of red, green and blue sub-pixels can be set differently, the design of increasing the opening area of the sub-pixels of some colors can be adopted, the difference between the opening area of the largest sub-pixel and the opening area of the smallest sub-pixel is larger, the resolution of the panel can be influenced, and the power consumption of the panel can be increased by increasing the opening of the sub-pixels to improve the light-emitting rate of corresponding colors. Therefore, the embodiment of the present invention improves the above problem, and the electrochromic device 50 is disposed at a corresponding position on the light emitting surface side of the fourth sub-pixel 204, and the electrochromic device 50 can automatically adjust its color to be in a transparent state or other states with colors such as red, blue, etc., and increase the display brightness or compensate the light emitting rate of the red sub-pixel or the green sub-pixel according to the requirement, so that the effect of increasing the light emitting rate can be achieved without increasing the opening area of the red sub-pixel or the opening area of the blue sub-pixel.
Specifically, the WOLED display panel includes a plurality of electrochromic devices 50, each electrochromic device 50 is disposed on one side of the light emitting surface of the light emitting layer 20, each electrochromic device 50 corresponds to the fourth sub-pixel 204, and after the white light emitted by the fourth sub-pixel 204 passes through the electrochromic device 50, the white light, the blue light, the red light, or other light with color is displayed.
The electrochromic device 50 can automatically adjust itself to be in a transparent state or other colored state according to different pictures to be displayed in the fourth sub-pixel region 104.
Specifically, when the fourth sub-pixel region 104 needs to display white light, the electrochromic device 50 is in a transparent state to enhance the brightness of the display screen; when the fourth sub-pixel region 104 needs to display non-white light, the electrochromic device 50 is in a color state with the same color as the light that needs to be emitted by the fourth sub-pixel region 104, so as to enhance the light-emitting rate of the corresponding color.
In one embodiment, the electrochromic device 50 includes a first electrode 51, a second electrode 54, and an electrochromic layer disposed between the first electrode 51 and the second electrode 54. Wherein the first electrode 51 is one of a positive electrode or a negative electrode, and the second electrode is the other one of the positive electrode and the negative electrode.
The electrochromic device 50 includes an organic electrochromic device and an inorganic electrochromic device according to the properties of electrochromic materials. The electrochromic material in the electrochromic layer generates electrochemical oxidation-reduction reaction under the action of the external electric field of the first electrode 51 and the second electrode 54, and the color of the material is changed through electron gain and loss.
The first electrode 51 and the second electrode 54 are made of transparent conductive materials, and may specifically be made of transparent indium tin oxide materials or indium zinc oxide materials.
In one embodiment, referring to fig. 1, the electrochromic layer includes an electrochromic material layer 52 and an electrolyte layer 53 disposed in a stacked manner.
The upper and lower positional relationship between the electrochromic material layer 52 and the electrolyte layer 53 is not limited, and the voltage applied thereto may be selected to be positive or negative according to the material color change characteristics of the electrochromic material layer 52.
The material of the electrochromic material layer 52 may be an inorganic material, and may also be an organic material. Specifically, the material of the electrochromic material layer 52 may be a metal oxide, a conductive organic small molecule, or a conductive polymer material. It will be appreciated that the choice of electrochromic material may be different depending on the desired colour change, and that the blue-transparent colour changing electrochromic material may be tungsten oxide (WO)3) Or the PEDOT is PSS, the PEDOT is an aqueous solution of a conductive high molecular polymer, the PEDOT is a polymer of EDOT (3, 4-ethylene dioxythiophene monomer), and the PSS is polystyrene sulfonate.
The electrolyte layer 53 may be a solid electrolyte layer or a non-solid electrolyte layer. The electrolyte layer 53 includes a resin material and an electrolyte salt (or conductive particles).
The electrolyte layer 53 in this embodiment is a solid electrolyte layer, and is formed by doping an electrolyte salt or conductive particles with a PMMA resin as a matrix to form a solid, flexible, and conductive charge transport layer.
In one embodiment, the electrochromic layer may be directly a resin film layer doped with the electrochromic material and an electrolyte salt.
The WOLED display panel 100 further includes a second thin film transistor array (not shown) for controlling the electrochromic device 50 to display different color states.
Specifically, the second tft array applies a positive voltage signal or a negative voltage signal to the electrochromic device 50, so that the electrochromic device 50 reversibly changes between a transparent display and a blue (or red or other color) display, and thus the fourth sub-pixel 204 may finally appear as a white sub-pixel and a blue sub-pixel (or a red sub-pixel or other color sub-pixel) according to the difference of the display frames of the WOLED display panel 100.
Specifically, the second thin film transistor array may be disposed on the first substrate 10, and may be disposed on the same layer as the first thin film transistor array. The second thin film transistor array can also be formed on a substrate separately.
The WOLED display panel 100 further includes a pixel defining layer 30, and the pixel defining layer 30 has a plurality of openings arranged in an array, each opening defining a pixel.
The light emitting layer 20 includes an anode 21, a light emitting functional layer 22, and a cathode 23 sequentially disposed on the first substrate 10.
In one embodiment, the light emitting function layer 22 includes a hole injection layer, a hole transport layer, a light emitting material layer, a charge generation layer, an electron transport layer, and an electron injection layer.
Each film layer of the light-emitting functional layer 22 provided by the invention can be evaporated through an open mask plate, so that the production cost is reduced. Specifically, the present embodiment may evaporate the hole injection layer, the hole transport layer, the light emitting material layer, the charge generation layer, the electron transport layer, and the electron injection layer through the same Common Mask (CMM).
The cathode 23 can also be prepared by evaporation using the above-mentioned common mask or by a sputtering method.
When the light emitting layer 20 is a two-layer light emitting layer, the light emitting material layer in the light emitting functional layer 22 includes a blue light emitting material layer and a yellow light emitting material layer, and the light emitting efficiency of blue light is low in this design, so that the electrochromic material of the electrochromic device 50 can be a transparent-blue electrochromic material, so that the fourth sub-pixel 204 finally emits blue light, so as to enhance the light emitting rate of the blue sub-pixel. The second thin film transistor array controls the electrochromic device 50 to reversibly change between a transparent display and a blue display.
Since the fourth sub-pixel 204 can enhance the light extraction rate of blue light, the aperture area of the blue sub-pixel in the other three sub-pixels does not need to be increased, but the aperture area of the blue sub-pixel can be decreased. That is, when the third sub-pixel 203 is a blue sub-pixel, the opening area S3 of the third sub-pixel 203 may be smaller than the opening area S2 of the second sub-pixel 202 and the opening area S1 of the first sub-pixel 201, so as to improve the light-emitting rate of the WOLED display panel 100, and simultaneously improve the resolution and reduce the panel power consumption.
When the light emitting layer 20 is a three-layer light emitting layer, the light emitting material layer in the light emitting function layer 22 includes three layers of a blue light emitting material layer, a yellow light emitting material layer, and a blue light emitting material layer, which are stacked, in this design, the light emitting rate of blue light is enhanced, but the light emitting rate of red light is low, so that the electrochromic material of the electrochromic device 50 can be a transparent-red electrochromic material, so that the fourth sub-pixel 204 finally emits red light to enhance the light emitting rate of the red sub-pixel. The second thin film transistor array controls the electrochromic device 50 to reversibly change between a transparent display and a red display.
Since the fourth sub-pixel 204 can enhance the light extraction rate of red light, the opening area of the red sub-pixel in the other three sub-pixels does not need to be increased, but the opening area of the red sub-pixel can be decreased. When the third sub-pixel 203 is a blue sub-pixel and the first sub-pixel 201 is a red sub-pixel, the aperture area S3 of the third sub-pixel 203 and the aperture area S1 of the first sub-pixel 201 may both be smaller than the aperture area S2 of the second sub-pixel 202, so as to improve the light-emitting rate of the WOLED display panel 100, and at the same time, improve the resolution and reduce the panel power consumption.
The WOLED display panel 100 may be a top-emission display panel or a bottom-emission display panel, that is, the WOLED display panel 100 may emit light in a direction away from the first substrate 10 or may emit light through the first substrate 10.
Both the first substrate 10 and the second substrate 60 can adopt flexible substrates, so that the prepared WOLED display panel is a flexible display panel. Since the electrochromic device 50 itself has no limitation of flexibility or rigidity, there is no influence on the preparation of the flexible display panel.
In one embodiment, as shown in fig. 1, the WOLED display panel 100 is a top emission display panel, the WOLED display panel 100 further includes a second substrate 60, the second substrate 60 is disposed opposite to the first substrate 10, the color-resist layer 40 and the electrochromic device 50 are disposed on a side of the second substrate 60 facing the light-emitting layer 20, that is, the color-resist layer 40 and the electrochromic device 50 are prepared on the second substrate 60.
The second thin film transistor array may be disposed on the second substrate 60 to control a color displayed by the electrochromic device 50.
In one embodiment, the WOLED display panel further comprises a planarization layer 70, the planarization layer 70 covering the color-resist layer 40 and the electrochromic device 50.
Firstly, preparing a color resistance layer 40 on the second substrate 60, then preparing the electrochromic device 50 in a corresponding area, then preparing a planarization layer 70 covering the color resistance layer 40 and the electrochromic device 50 to provide a flat surface for protection, and finally, attaching the second substrate 60 to the first substrate 10 with the light-emitting layer 20.
In one embodiment, as shown in fig. 2, unlike the embodiment shown in fig. 1, the electrochromic device 50 is disposed on the side of the light emitting layer 20 facing the color-resist layer 40, and the color-resist layer 40 is disposed on the side of the second substrate 60 facing the light emitting layer 20, that is, the electrochromic device 50 is prepared on the light emitting layer 20, and the color-resist layer 40 is prepared on the second substrate 60.
Specifically, an encapsulation layer 80 is disposed on the light emitting layer 20, and the electrochromic device 50 is disposed on the encapsulation layer 80.
The second thin film transistor array may be disposed on the first substrate 10, and the second thin film transistor array and the first thin film transistor array may be disposed on the same layer, which may save a manufacturing process.
The second substrate 60 having the color resist layer 40 is attached to the first substrate 10 having the electrochromic device 50.
In other embodiments, the color resist layer 40 can also be disposed directly on the light emitting layer 20. In particular, may be disposed on the encapsulation layer 80 in the same layer as the electrochromic device 50.
In one embodiment, as shown in fig. 3, the WOLED display panel is a bottom emission type display panel, and the color resistance layer 40 and the electrochromic device 50 are disposed on the first substrate 10.
Specifically, the color resistance layer 40 and the electrochromic device 50 are both disposed between the light emitting layer 20 and the first substrate 10.
The second thin film transistor array and the first thin film transistor array are disposed on the same layer on the first substrate 10.
A planarization layer 70 is disposed on the color resist layer 40 and the electrochromic device 50, and the planarization layer 70 provides a flat substrate for preparing the light-emitting layer 20.
In one embodiment, the second substrate 60 is used as a cover plate covering the light emitting layer 20.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The electrochromic device 50 corresponding to the fourth sub-pixel 204 is additionally arranged, so that the white light emitted by the fourth sub-pixel 204 can be used as a white light sub-pixel and can be converted into other sub-pixels with different light colors such as blue light or red light for use, the opening area of the blue sub-pixel or the red sub-pixel can be reduced, the light emitting efficiency of the WOLED display panel 100 can be improved, the resolution of the WOLED display panel 100 can be improved, the power consumption of the panel can be reduced, and the service life of the panel can be prolonged.
The WOLED display panel provided by the embodiment of the present invention is described in detail above, and the principle and the implementation of the present invention are explained herein by applying specific examples, and the description of the above embodiments is only used to help understanding the technical solution and the core idea of the present invention; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A WOLED display panel having a plurality of first, second, third, and fourth sub-pixel regions defined thereon, the WOLED display panel comprising:
a first substrate including a first thin film transistor array;
a light emitting layer disposed on the first substrate, the light emitting layer including a plurality of pixels, each pixel including a first sub-pixel located in the first sub-pixel region, a second sub-pixel located in the second sub-pixel region, a third sub-pixel located in the third sub-pixel region, and a fourth sub-pixel located in the fourth sub-pixel region;
the color resistance layer is arranged on one side of the light-emitting surface of the light-emitting layer and comprises a first color resistance, a second color resistance and a third color resistance which are in one-to-one correspondence with the first sub-pixel, the second sub-pixel and the third sub-pixel; and
the plurality of electrochromic devices are arranged on one side of the light emitting surface of the light emitting layer and correspond to each fourth sub-pixel; wherein,
the electrochromic device automatically adjusts the electrochromic device to be in a transparent state or have a color state along with different pictures to be displayed in the fourth sub-pixel area.
2. The WOLED display panel of claim 1, wherein when the fourth sub-pixel region is required to display white light, the electrochromic device is in a transparent state, and when the fourth sub-pixel region is required to display non-white light, the electrochromic device is in a color state that is the same as the color of light required to be emitted by the fourth sub-pixel region.
3. The WOLED display panel of claim 1, wherein the electrochromic device comprises a first electrode, a second electrode, and an electrochromic layer disposed between the first electrode and the second electrode.
4. The WOLED display panel of claim 3, wherein the electrochromic layer comprises a layer of electrochromic material and a layer of electrolyte arranged in a stack.
5. The WOLED display panel of claim 3, wherein the electrochromic layer is a resin film layer doped with an electrochromic material, an electrolyte salt.
6. The WOLED display panel of claim 1, further comprising a second substrate disposed opposite the first substrate and a second array of thin film transistors controlling the electrochromic device to assume different color states.
7. The WOLED display panel of claim 6, wherein the color-resist layer and the electrochromic device are disposed on a side of the second substrate facing the light-emitting layer.
8. The WOLED display panel of claim 7, wherein the second array of thin film transistors is disposed on the second substrate.
9. The WOLED display panel of claim 6, wherein the WOLED display panel is a top emission display panel, the color-resist layer is disposed on a side of the second substrate facing the light-emitting layer, and the electroluminescent device is disposed on a side of the light-emitting layer facing the color-resist layer.
10. The WOLED display panel of claim 9, wherein the second thin film transistor array is disposed on the first substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110034277.6A CN112786671B (en) | 2021-01-12 | 2021-01-12 | WOLED display panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110034277.6A CN112786671B (en) | 2021-01-12 | 2021-01-12 | WOLED display panel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112786671A true CN112786671A (en) | 2021-05-11 |
| CN112786671B CN112786671B (en) | 2022-11-08 |
Family
ID=75757073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110034277.6A Active CN112786671B (en) | 2021-01-12 | 2021-01-12 | WOLED display panel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112786671B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116665613A (en) * | 2023-06-29 | 2023-08-29 | 惠科股份有限公司 | Display panel driving method, display panel and display device |
| CN116741095A (en) * | 2023-06-30 | 2023-09-12 | 惠科股份有限公司 | Display panel driving method, display panel and display device |
| CN117750834A (en) * | 2023-11-08 | 2024-03-22 | 惠科股份有限公司 | Flexible display panel, preparation method thereof and flexible display device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102707510A (en) * | 2011-05-19 | 2012-10-03 | 京东方科技集团股份有限公司 | Color film baseplate, display panel, display and method for producing color film baseplate |
| CN104777663A (en) * | 2015-04-28 | 2015-07-15 | 深圳市华星光电技术有限公司 | Color film substrate and liquid crystal display panel |
| CN105679798A (en) * | 2016-01-22 | 2016-06-15 | 京东方科技集团股份有限公司 | OLED display device and pixel repair method thereof |
| CN109065601A (en) * | 2018-09-21 | 2018-12-21 | 京东方科技集团股份有限公司 | Display panel and preparation method thereof, display device |
| CN110518029A (en) * | 2019-09-23 | 2019-11-29 | 德淮半导体有限公司 | Imaging sensor and preparation method thereof |
| 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 |
-
2021
- 2021-01-12 CN CN202110034277.6A patent/CN112786671B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102707510A (en) * | 2011-05-19 | 2012-10-03 | 京东方科技集团股份有限公司 | Color film baseplate, display panel, display and method for producing color film baseplate |
| CN104777663A (en) * | 2015-04-28 | 2015-07-15 | 深圳市华星光电技术有限公司 | Color film substrate and liquid crystal display panel |
| CN105679798A (en) * | 2016-01-22 | 2016-06-15 | 京东方科技集团股份有限公司 | OLED display device and pixel repair method thereof |
| CN109065601A (en) * | 2018-09-21 | 2018-12-21 | 京东方科技集团股份有限公司 | Display panel and preparation method thereof, display device |
| CN110518029A (en) * | 2019-09-23 | 2019-11-29 | 德淮半导体有限公司 | Imaging sensor and preparation method thereof |
| 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 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116665613A (en) * | 2023-06-29 | 2023-08-29 | 惠科股份有限公司 | Display panel driving method, display panel and display device |
| CN116665613B (en) * | 2023-06-29 | 2024-09-06 | 惠科股份有限公司 | Display panel driving method, display panel and display device |
| CN116741095A (en) * | 2023-06-30 | 2023-09-12 | 惠科股份有限公司 | Display panel driving method, display panel and display device |
| CN117750834A (en) * | 2023-11-08 | 2024-03-22 | 惠科股份有限公司 | Flexible display panel, preparation method thereof and flexible display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112786671B (en) | 2022-11-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112786671B (en) | WOLED display panel | |
| KR100670543B1 (en) | Organic Electro luminescence Device | |
| CN100514702C (en) | Organic electroluminescent device and fabrication method thereof | |
| CN107425043B (en) | Organic light emitting display device, control method and display device | |
| US7633218B2 (en) | OLED device having improved lifetime and resolution | |
| KR101736929B1 (en) | White organic light emitting diode display device | |
| US20120112172A1 (en) | Display device, method of manufacturing display device, and electronic apparatus | |
| CN109599420B (en) | Display panel and manufacturing method thereof | |
| KR20050007159A (en) | Emissive display device | |
| US7342249B2 (en) | Organic electroluminescent device and fabricating method thereof | |
| WO2012132862A1 (en) | Organic electroluminescence display and method for manufacturing same | |
| US11024676B2 (en) | Organic light-emitting diode display panel and manufacturing method thereof, and display device | |
| JP2010287319A (en) | Structure and its manufacturing method of organic el display | |
| KR20160110664A (en) | Complex display device | |
| CN110459586B (en) | Array substrate and display panel | |
| KR20090087274A (en) | Organic light emitting diode display and method for manufacturing the same | |
| WO2022257951A1 (en) | Electroluminescent unit, display panel, and electronic device | |
| KR20170075345A (en) | Organic light emitting display apparatus | |
| CN110462870B (en) | Display substrate, method of manufacturing the same, and display apparatus | |
| CN111584573A (en) | OLED display panel and preparation method thereof | |
| CN112864207B (en) | Display panel and display device | |
| CN113193007B (en) | Display panel, preparation method thereof and display device | |
| KR100759557B1 (en) | Organic light emitting display apparatus | |
| KR101611905B1 (en) | Organic Light Emitting Display Device and Manufacturing Method of the Same | |
| CN108258023B (en) | Display back plate and manufacturing method thereof, display panel 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 |