CN111883570A - Display panel, display device and control method of display panel - Google Patents
Display panel, display device and control method of display panel Download PDFInfo
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- CN111883570A CN111883570A CN202010779628.1A CN202010779628A CN111883570A CN 111883570 A CN111883570 A CN 111883570A CN 202010779628 A CN202010779628 A CN 202010779628A CN 111883570 A CN111883570 A CN 111883570A
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- 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
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/15—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
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/15—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
- G02F1/163—Operation of electrochromic cells, e.g. electrodeposition cells; Circuit arrangements therefor
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
-
- 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
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The embodiment of the invention provides a display panel, a display device and a control method of the display panel, wherein the display panel comprises: a substrate; a first anode layer disposed on the substrate; the organic light-emitting layer is arranged on one surface, away from the substrate, of the first anode; the first cathode layer is arranged on one surface of the organic light emitting layer, which is far away from the first anode layer; the electrochromic layer is arranged on one side, away from the organic light emitting layer, of the first cathode layer. The display panel provided by the embodiment of the invention has the advantages that the electrochromic layer is arranged on the organic light emitting layer, the full-brightness DC dimming of OLED display can be realized, and the commonly used PWM dimming at present is replaced, so that the problems of a cloth wiping screen, gray scale loss, faults, color deviation, smear and the like under the condition of DC dimming low brightness can be eliminated, meanwhile, the damage of PWM dimming low-frequency flicker to the vision of human eyes is avoided, and the display quality of the display panel is improved.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display panel, a display device, and a control method of the display panel.
Background
The OLED (organic light emitting material) display panel has the characteristics of self-luminescence, high brightness, clear display, fast response speed, wide viewing angle, low power consumption, flexible display realization, and the like, and is known as a "dream display," which has become a main research object of the third generation display device in the display technology field.
At present, the OLED display panel usually adopts a PWM (Pulse-Width Modulation) dimming technology, the PWM dimming reduces the maximum brightness and increases the minimum brightness, the brightness of the display panel is reduced by adjusting the duty ratio and shortening the brightness duration, and the PWM dimming adjusts the brightness of the display panel by fast flashing, but frequent flashing is more likely to cause fatigue to muscles on both sides of eyes, so as to stimulate the light bending system to perform linkage and accelerate the aging of eyesight.
The DC (direct current) dimming method is generally applied to LCD (liquid crystal display) and LED (inorganic light emitting material) display panels, and when the screen brightness is reduced by using the DC dimming technique, the display panel may have a color shift problem, so the DC dimming technique is rarely applied to the OLED display panel at present.
Disclosure of Invention
The invention provides a display panel, which aims to solve the problem that the existing display panel cannot use a DC dimming technology to perform dimming.
One aspect of the present invention provides a display panel including:
a substrate;
a first anode layer disposed on the substrate;
the organic light-emitting layer is arranged on one surface, away from the substrate, of the first anode;
the first cathode layer is arranged on one side, away from the first anode layer, of the organic light emitting layer;
an electrochromic layer disposed on a side of the first cathode layer facing away from the organic light emitting layer.
Optionally, the electrochromic layer comprises: an electrochromic material and a second anode layer; the electrochromic material is disposed between the first cathode layer and the second anode layer.
Optionally, the electrochromic layer further comprises: a second cathode layer; the second cathode layer is disposed between the electrochromic material and the first cathode layer.
Optionally, the electrochromic material comprises one of polypyrrole, polythiophene and polyaniline.
Optionally, the electrochromic material comprises: an ion storage layer, an electrolyte layer, and an electroluminescent layer; the electrolyte layer is disposed between the ion storage layer and the electroluminescent layer.
Optionally, the electrochromic layers are arranged in an array, and an orthographic projection of the electrochromic layers on the organic light emitting layer is on the organic light emitting layer.
Optionally, the electrochromic layer entirely covers a side of the first cathode layer facing away from the organic light emitting layer.
A second aspect of the invention provides a display device comprising the display panel described in any one of the above.
A third aspect of the present invention provides a control method for a display panel, applied to the display panel, wherein the organic light emitting layer and the electrochromic layer share the first cathode layer; the method comprises the following steps:
when the organic light emitting layer is adjusted to be dark through direct current, the voltage at two ends of the electrochromic layer is adjusted, and the display of the display panel is changed.
A fourth aspect of the present invention provides a method of controlling a display panel, applied to the display panel described above, wherein the organic light emitting layer and the electrochromic layer are electrically controlled, respectively; the method comprises the following steps:
when the organic light emitting layer is adjusted to be dark through direct current, an original image is decomposed into two images which are respectively transmitted to the organic light emitting layer and the electrochromic layer to be respectively displayed.
An embodiment of the present invention provides a display panel, including: a substrate; a first anode layer disposed on the substrate; the organic light-emitting layer is arranged on one surface, away from the substrate, of the first anode; the first cathode layer is arranged on one side, away from the first anode layer, of the organic light emitting layer; an electrochromic layer disposed on a side of the first cathode layer facing away from the organic light emitting layer. According to the display panel provided by the embodiment of the invention, the electrochromic layer is arranged on the organic light emitting layer, so that the problem of uneven display can be avoided when the DC dimming technology is adopted to control the brightness of the OLED display panel, and the display quality of the display panel is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
FIG. 4 is a circuit diagram of a display panel according to an embodiment of the present invention;
FIG. 5 is a circuit diagram of another display panel control circuit according to an embodiment of the present invention;
fig. 6 is an exploded view of an original image according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, there is provided a display panel including:
a substrate 10;
a first anode layer 20 disposed on the substrate;
an organic light-emitting layer 30 disposed on a side of the first anode facing away from the substrate;
a first cathode layer 40 disposed on a side of the organic light emitting layer facing away from the first anode layer;
an electrochromic layer 50 arranged on a side of the first cathode layer facing away from the organic light emitting layer.
In an embodiment of the present invention, the substrate 10 includes: a glass substrate; the materials of the first anode layer 20 and the first cathode layer 40 include: an ITO (indium tin oxide) transparent electrode.
In an embodiment of the present invention, referring to fig. 1, the electrochromic layer 50 includes: an electrochromic material 51 and a second anode layer 52; the electrochromic material 51 is arranged between the first cathode layer 40 and the second anode layer 52.
In the embodiment of the invention, the electrochromic material can realize local dimming, so that the contrast of the display screen is improved.
In an embodiment of the present invention, referring to fig. 2, the electrochromic layer 50 further includes: a second cathode layer 53; the second cathode layer 53 is arranged between the electrochromic material 51 and the first cathode layer 40.
In the embodiment of the present invention, referring to fig. 1 to 3, a glass cover plate 60 is further included, and when the second cathode layer is provided, the specific preparation method is as follows: a second anode layer, an electrochromic material, and a second cathode layer are sequentially formed on the glass cover plate 60 to form an electrochromic layer, and then paired with the first cathode layer.
In an embodiment of the present invention, the electrochromic material includes one of polypyrrole, polythiophene, and polyaniline.
Wherein, referring to fig. 1, the electrochromic layer and the organic light emitting layer share a first cathode layer 40.
In an embodiment of the present invention, referring to fig. 1, the electrochromic layers 50 are arranged in an array, and the electrochromic layers 50 are projected on the organic light emitting layer 30 at the front of the organic light emitting layer 30.
In the embodiment of the present invention, referring to fig. 1, the electrochromic layer 50 and the organic light emitting layer 30 correspond one to one. In the specific preparation process, a single pixel is coated with the electrochromic material above the first cathode layer 40, patterning is formed through exposure and etching processes, the second anode layer 52 is deposited above the electrochromic material 51, and finally packaging is performed.
In an embodiment of the present invention, referring to fig. 3, the electrochromic layer 50 entirely covers a side of the first cathode layer 40 facing away from the organic light emitting layer 30.
When the electrochromic layer 50 entirely covers the side of the first cathode layer 40 away from the organic light emitting layer 30, in a specific preparation process, the electrochromic material 51 is entirely coated on the first cathode layer 40, and then the second anode layer 52 is deposited on the electrochromic material 51, and finally the package is performed.
In the present embodiment, the electrochromic material 51 includes: an ion storage layer, an electrolyte layer, and an electroluminescent layer; the electrolyte layer is disposed between the ion storage layer and the electroluminescent layer.
In the embodiment of the present invention, the electrochromic layer 50 includes a five-layer structure, which is a second cathode layer, an ion storage layer, an electrolyte layer, an electroluminescent layer, and a second anode layer in this order.
The electrochromic layer 50 works according to the following principle: when no voltage is applied between the second cathode layer and the second anode layer, the electrochromic layer in the initial state is colorless or light-colored and presents a transparent or approximately transparent state; when voltage is applied between the second cathode layer and the second anode layer, under the action of an external electric field, ions in the ion storage layer enter the electroluminescent layer through the electrolyte layer, electrons enter the electrochromic layer from the second anode layer, the electrochromic layer is colored after oxidation reaction or reduction reaction, a reflective state is presented, the reaction is reversible, and the electrochromic layer is restored to a transparent state after the external electric field is cancelled.
In the embodiment of the present invention, when the electrochromic layer and the organic light emitting layer share the first cathode layer, the second cathode layer may be replaced with the first cathode layer.
Another aspect of the invention provides a display device including the display panel described in any one of the above.
An embodiment of the present invention provides a display panel, including: a substrate; a first anode layer disposed on the substrate; the organic light-emitting layer is arranged on one surface, away from the substrate, of the first anode; the first cathode layer is arranged on one side, away from the first anode layer, of the organic light emitting layer; an electrochromic layer disposed on a side of the first cathode layer facing away from the organic light emitting layer. The display panel provided by the embodiment of the invention has the advantages that the electrochromic layer is arranged on the organic light emitting layer, the full-brightness DC dimming of OLED display can be realized, and the commonly used PWM dimming at present is replaced, so that the problems of a cloth wiping screen, gray scale loss, faults, color deviation, smear and the like under the condition of DC dimming low brightness can be eliminated, meanwhile, the damage of PWM dimming low-frequency flicker to the vision of human eyes is avoided, and the display quality of the display panel is improved.
Example two
A third aspect of the present invention provides a control method of a display panel, applied to the display panel shown in fig. 1 and 3, wherein the organic light emitting layer and the electrochromic layer share the first cathode layer; the method comprises the following steps:
when the organic light emitting layer is adjusted to be dark through direct current, the voltage at two ends of the electrochromic layer is adjusted, and the display of the display panel is changed.
Referring to fig. 4, when the electrochromic layer and the organic light emitting layer share the first cathode layer, a voltage (Vdc in fig. 1 and 3) across the electrochromic layer is generated by a partial voltage of the adjustable resistor R3, and different Vdc is generated by adjusting a resistance of the adjustable resistor R3, so that transmittance of the electrochromic material can be controlled, and dimming of the OLED display panel is achieved.
In the embodiment of the invention, the display of the display panel is changed by adjusting the voltage at the two ends of the electrochromic layer, so that the problems of a cloth wiping screen, gray scale loss, faults, color deviation, smear and the like under the condition of DC dimming low brightness can be eliminated, meanwhile, the damage of PWM dimming low-frequency flicker to the vision of human eyes is avoided, and the display quality of the display panel is improved.
EXAMPLE III
The embodiment of the invention provides a control method of a display panel, which is applied to the display panel shown in fig. 2, wherein the organic light emitting layer and the electrochromic layer are respectively electrically controlled; the method comprises the following steps:
when the organic light emitting layer is adjusted to be dark through direct current, an original image is decomposed into two images which are respectively transmitted to the organic light emitting layer and the electrochromic layer to be respectively displayed.
Referring to fig. 2, 5 and 6, two sets of driving circuits respectively control the organic light emitting layer (Voled control) and the electrochromic material (Vdc control), an FPGA (Field-Programmable gate array) is used to decompose the original image data into two images, which are respectively transmitted to the organic light emitting layer and the electrochromic layer for respective display, and DC dimming and contrast improvement are realized through image matching.
In the embodiment of the invention, the original image is decomposed into two images which are respectively transmitted to the organic light emitting layer and the electrochromic layer for respective display, so that the problems of a cloth wiping screen, gray scale loss, faults, color deviation, smear and the like under the condition of DC dimming low brightness can be solved, meanwhile, the damage of PWM dimming low-frequency flicker to the vision of human eyes is avoided, and the display quality of the display panel is improved.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A display panel, comprising:
a substrate;
a first anode layer disposed on the substrate;
the organic light-emitting layer is arranged on one surface, away from the substrate, of the first anode;
the first cathode layer is arranged on one side, away from the first anode layer, of the organic light emitting layer;
an electrochromic layer disposed on a side of the first cathode layer facing away from the organic light emitting layer.
2. The display panel according to claim 1, wherein the electrochromic layer comprises: an electrochromic material and a second anode layer; the electrochromic material is disposed between the first cathode layer and the second anode layer.
3. The display panel of claim 2, wherein the electrochromic layer further comprises: a second cathode layer; the second cathode layer is disposed between the electrochromic material and the first cathode layer.
4. The display panel of claim 2, wherein the electrochromic material comprises one of polypyrrole, polythiophene, and polyaniline.
5. The display panel of claim 2, wherein the electrochromic material comprises: an ion storage layer, an electrolyte layer, and an electroluminescent layer; the electrolyte layer is disposed between the ion storage layer and the electroluminescent layer.
6. The display panel according to any one of claims 1 to 5, wherein the electrochromic layers are arranged in an array, and wherein the electrochromic layers are projected on the organic light emitting layer at an orthographic position of the organic light emitting layer.
7. The display panel according to any one of claims 1 to 5, wherein the electrochromic layer entirely covers a side of the first cathode layer facing away from the organic light emitting layer.
8. A display device characterized by comprising the display panel according to any one of claims 1 to 7.
9. A control method of a display panel applied to the display panel according to claim 1 or 2, wherein the organic light emitting layer and the electrochromic layer share the first cathode layer; the method comprises the following steps:
when the organic light emitting layer is adjusted to be dark through direct current, the voltage at two ends of the electrochromic layer is adjusted, and the display of the display panel is changed.
10. A control method of a display panel applied to the display panel according to claim 3, wherein the organic light emitting layer and the electrochromic layer are electrically controlled separately; the method comprises the following steps:
when the organic light emitting layer is adjusted to be dark through direct current, an original image is decomposed into two images which are respectively transmitted to the organic light emitting layer and the electrochromic layer to be respectively displayed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010779628.1A CN111883570B (en) | 2020-08-05 | 2020-08-05 | Display panel, display device and control method of display panel |
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| CN202010779628.1A CN111883570B (en) | 2020-08-05 | 2020-08-05 | Display panel, display device and control method of display panel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114355649A (en) * | 2021-12-27 | 2022-04-15 | 绵阳惠科光电科技有限公司 | Color temperature compensation device, backlight module and display device |
| CN116364004A (en) * | 2023-03-27 | 2023-06-30 | 惠科股份有限公司 | Display device and driving method thereof |
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| CN116364004A (en) * | 2023-03-27 | 2023-06-30 | 惠科股份有限公司 | Display device and driving method thereof |
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| CN111883570B (en) | 2022-11-29 |
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