CN107425043B - Organic light emitting display device, control method and display device - Google Patents
Organic light emitting display device, control method and display device Download PDFInfo
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- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
- H10K50/125—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light
- H10K50/13—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light comprising stacked EL layers within one EL unit
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- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
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Abstract
The invention discloses an organic light-emitting display device, a control method and a display device. The organic light emitting display device includes: a substrate; an anode layer disposed on the substrate; the light-emitting layer is arranged on one side, far away from the substrate, of the anode layer; the cathode layer is arranged on one side of the light emitting layer far away from the anode layer; and the electrochromic layer is arranged between the anode layer and the substrate, or the cathode layer is far away from one side of the luminous layer. Therefore, the problems of light leakage in a non-pixel area and crosstalk light emission of adjacent sub-pixels can be solved, and the display effect of the device is improved.
Description
Technical Field
The invention relates to the field of organic photoelectricity, in particular to an organic light-emitting display device, a control method and a display device.
Background
Organic Light Emitting Diodes (OLEDs) have attracted much attention in the display field due to their advantages of self-emission, thinness, good color gamut, low power consumption, flexibility, etc. At present, OLED technology is gradually mature and slowly enters the market. OLEDs are diodes that emit light by carrier injection and recombination under electric field drive using organic semiconductor materials and light emitting materials. Under the drive of a certain voltage, the electrons and the holes respectively migrate to the luminescent layer and meet at the luminescent layer to form excitons, so that luminescent molecules are excited, and the excited luminescent molecules emit visible light through radiation relaxation.
However, the organic light emitting display device, the control method thereof and the display apparatus are still to be improved.
Disclosure of Invention
The present invention is based on the discovery and recognition by the inventors of the following facts and problems:
at present, the large-size organic light-emitting display device mostly has the problems of light leakage at a non-pixel area at the edge of a pixel and crosstalk light emission of adjacent sub-pixels, and further the display effect of the display device is influenced. The inventors have intensively studied and found a lot of experiments, which is mainly caused by that a charge generation layer of a large-sized organic light emitting display device has a certain amount of positive charges transferred to a non-pixel region and an adjacent sub-pixel region. As described above, in the organic light emitting display device, when operating, holes and electrons are injected from the pixel electrode and the cathode, respectively, and recombine to the light emitting layer through the organic functional layer to emit light. Currently, the large-sized OLED panel mostly adopts a four-pixel display technology, such as the WOLED technology. Since the WOLED technology uses a blue plus yellow (B + Y) two-layer structure or a blue plus yellow plus blue (B + Y + B) three-layer structure to realize display, a charge generation layer must be used, and the charge generation layer usually uses an active metal lithium-doped Electron Transport Layer (ETL) as an electron generation layer. When the pixel is lighted, electrons and holes are injected from the cathode and the anode to the charge generation layer to form current, and the light emitting layer is of a whole continuous structure, so lithium ions in the charge generation layer can be driven by the current to migrate from the light emitting layer of the pixel area to the light emitting layer of the non-pixel area and even to the light emitting layer of the adjacent sub-pixel to generate positive charges to be recombined with electrons of the cathode, so that light leakage of the non-pixel area and crosstalk light emission of the adjacent sub-pixel area are realized. When the pixel is lighted for a long time, the work of the device is aged, the longitudinal resistance is gradually increased and is close to the transverse resistance, so that the current can be transversely transmitted at the Charge Generation Layer (CGL), the light leakage of the edge of the pixel and the adjacent pixel is caused, and the light leakage problem is more serious. In addition, for the small-sized OLED panel, the inventors found that the small-sized OLED panel is a single-color device, and since the functional layer is common in the single-color process, the edge pixel light leakage phenomenon may also occur. At present, aiming at the problem of light leakage of pixels at the edge of a small-size OLED panel, although UV irradiation can be adopted for a common functional layer through a mask to damage organic functional keys of the common functional layer, so that the common functional layer loses the characteristics of hole transmission and electron transmission, and the light leakage is avoided, the difficulty of the actual operation process is high.
The present invention aims to alleviate or solve at least to some extent at least one of the above mentioned problems.
In one aspect of the present invention, an organic light emitting display device is provided. The organic light emitting display device includes: a substrate; an anode layer disposed on the substrate; the light-emitting layer is arranged on one side, far away from the substrate, of the anode layer; the cathode layer is arranged on one side of the light emitting layer far away from the anode layer; and the electrochromic layer is arranged between the anode layer and the substrate, or the cathode layer is far away from one side of the luminous layer. Therefore, the problems of light leakage in a non-pixel area and crosstalk light emission of adjacent sub-pixels can be solved, and the display effect of the device is improved.
According to an embodiment of the present invention, the light emitting layer includes a plurality of sub light emitting regions, the sub light emitting regions are separated by a defining layer, the anode layer includes a plurality of first sub electrodes, the first sub electrodes are arranged in one-to-one correspondence with the sub light emitting regions, the light emitting layer has a first light emitting surface and a second light emitting surface which are arranged oppositely, the first light emitting surface is close to a light emitting direction of the organic light emitting device, and the second light emitting surface is far away from the light emitting direction of the organic light emitting device. The anode electrodes correspond to the light emitting areas one by one, and can control the light emission of different areas.
According to an embodiment of the present invention, the organic light emitting display device further includes: the filter layer is arranged close to the first light emitting surface, a plurality of color resistance units are arranged in the filter layer, and the color resistance units are arranged corresponding to the sub light emitting areas; the electrochromic layer is arranged on one side, away from the first light emitting surface, of the filter layer, the electrochromic layer comprises a plurality of electrochromic units, the electrochromic units are in one-to-one correspondence with the color resistance units, and the electrochromic units are in projection on the substrate and cover the color resistance units. The light transmittance of the electrochromic layer can be controlled by the external voltage, so that the problems of light leakage in a non-pixel area and crosstalk light emission of adjacent sub-pixels can be solved by controlling the light transmittance of the electrochromic unit arranged corresponding to the sub-light emitting area.
According to an embodiment of the present invention, the organic light emitting display device further includes: the thin film transistor layer is arranged between the substrate and the anode layer and comprises a plurality of thin film transistors, and the thin film transistors are respectively connected with the first sub-electrodes and the electrochromic units; and a plurality of scan data lines connected to the thin film transistors. Therefore, the electrochromic layer can be controlled by the thin film transistor, and light leakage in a non-pixel area and crosstalk light emission of adjacent sub-pixels are prevented.
According to an embodiment of the present invention, the organic light emitting display device further includes: and the electrochromic control electrodes are connected with the electrochromic units. Therefore, the electrochromic layer can be controlled by the electrochromic control electrode, and light leakage in a non-pixel area and crosstalk light emission of adjacent sub-pixels are prevented.
According to the embodiment of the invention, the color resistance unit is a red color resistance unit, a green color resistance unit, a blue color resistance unit or a white color resistance unit. Thereby, the display effect of the organic light emitting display device can be further improved.
According to an embodiment of the present invention, a material forming the electrochromic layer includes at least one of an insulating electrochromic material and a conductive electrochromic material. Thus, the electrochromic layer can be formed using the materials widely available as described above.
In another aspect of the present invention, a display device is provided. According to an embodiment of the present invention, the display apparatus includes the organic light emitting display device described above. Thus, the display device has all the features and advantages of the organic light emitting display device described above, and thus, the description thereof is omitted. In general, the display device has a good display effect.
In another aspect of the present invention, a method of controlling an organic light emitting display device is provided. According to an embodiment of the present invention, an organic light emitting display device includes a substrate, and an anode layer, a light emitting layer, and a cathode layer sequentially disposed on the substrate, wherein an electrochromic layer is disposed between the substrate and the anode layer or on a side of the cathode layer away from the light emitting layer, and the method includes: applying a voltage to the electrochromic layer such that a light transmittance of the electrochromic layer is increased. Therefore, the problems of light leakage in a non-pixel area and crosstalk light emission of adjacent sub-pixels can be solved through simple operation, and the display effect of the device is improved.
According to an embodiment of the present invention, the light emitting layer includes a plurality of sub light emitting regions, the anode layer is provided with first sub electrodes corresponding to the sub light emitting regions one to one, the electrochromic layer includes a plurality of electrochromic units, a projection of the electrochromic units on the substrate covers a projection of the sub light emitting regions on the substrate, the organic light emitting display device further includes a plurality of thin film transistors, the thin film transistors are respectively connected to the first sub electrodes and the electrochromic units, which are provided correspondingly, and applying a voltage to the electrochromic layer further includes: and opening the thin film transistor, and applying voltage to the first sub-electrode and the electrochromic unit so as to enable the sub-luminous zone corresponding to the first sub-electrode to emit light and enable the light transmittance of the electrochromic unit to be increased. The thin film transistor is used for simultaneously controlling the first sub-electrode and the electrochromic unit, so that the process is simple and easy to realize.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 shows a schematic configuration diagram of an organic light emitting display device according to an embodiment of the present invention;
fig. 2 shows a schematic configuration diagram of an organic light emitting display device according to another embodiment of the present invention;
fig. 3 shows a schematic structure of a related art organic light emitting display device;
fig. 4 shows a schematic structural view of an organic light emitting display device according to an embodiment of the present invention; and
fig. 5 shows a schematic structural view of an organic light emitting display device according to another embodiment of the present invention.
Description of reference numerals:
100: a substrate; 200: an electrochromic layer; 210: an electrochromic cell; 300: an anode layer; 310: a first sub-electrode; 400: a light emitting layer; 410: a sub-light emitting region; 420: a first light emitting surface; 430: a second light emitting face; 500: a cathode layer; 600: a defining layer; 700: a filter layer; 710: and a color resistance unit.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In one aspect of the present invention, an organic light emitting display device is provided. According to an embodiment of the present invention, referring to fig. 1 and 2, the organic light emitting display device includes: a substrate 100, an electrochromic layer 200, an anode layer 300, a light emitting layer 400, and a cathode layer 500. Wherein the anode layer 300 is disposed on the substrate 100, the light emitting layer 400 is disposed on a side of the anode layer 300 away from the substrate 100, the cathode layer 500 is disposed on a side of the light emitting layer 400 away from the anode layer 300, the electrochromic layer 200 is disposed between the anode layer 300 and the substrate 100 (as shown in fig. 1), or the electrochromic layer 200 is disposed on a side of the cathode layer 500 away from the light emitting layer 400 (as shown in fig. 2). Therefore, the problems of light leakage in a non-pixel area and crosstalk light emission of adjacent sub-pixels can be solved, and the display effect of the device is improved.
For ease of understanding, the operation principle of the organic light emitting display device according to an embodiment of the present invention will be briefly described below:
as mentioned above, the large size OLED panel adopts the WOLED technology due to its large size. This technique requires a charge generation layer due to the arrangement of the structure. Because the charge generation layer is doped with lithium, when the pixel is lighted, besides electrons and holes injected from the cathode and the anode are recombined in the light emitting layer, part of lithium ions in the charge generation layer can be driven by current to migrate to the light emitting layer in the non-pixel area and the light emitting layer in the adjacent sub-pixel area, and are recombined with cathode electrons in the non-pixel area and the adjacent sub-pixel area to emit light, so that the problems of pixel edge light emission and pixel crosstalk are caused. When a pixel is lit for a long time, the resistance increases due to aging of the device, and the light leakage problem is further serious. Specifically, referring to fig. 3, the organic light emitting display device includes a substrate 100, an anode layer 300, a light emitting layer 400, and a cathode layer 500. When a certain voltage is applied to the anode layer 300 and the cathode layer 500, electrons and holes are recombined in the light emitting layer 400 to emit light, and positive charges in the charge generating layer are driven by current to migrate to the non-pixel region and the adjacent sub-pixel region, where they are recombined with electrons to emit light, thereby causing light leakage in the non-pixel region and crosstalk light emission in the adjacent sub-pixel region. In addition, in the small-sized OLED panel, since the functional layers are common in the single color process, the edge pixel light leakage phenomenon may also occur. At present, aiming at the problem of light leakage of pixels at the edge of a small-size OLED panel, UV irradiation can be carried out on a common functional layer through a mask to damage organic functional keys of the common functional layer, so that the characteristics of hole transmission and electron transmission are lost, the light leakage is avoided, and the difficulty of an actual operation process is high.
According to the embodiment of the invention, one electrochromic layer is arranged on the light emitting surface (light emitting direction) side of the device, and the size of the electrochromic layer of the pixel region is larger than or equal to that of the corresponding sub-pixel. When the sub-pixels are lightened, the corresponding electrochromic layers can be electrified, the light transmittance of the electrochromic layers is increased, the electrochromic layers at the positions can transmit light, the peripheral edges of the sub-pixels and the electrochromic layers of the adjacent sub-pixel areas are opaque, light cannot pass through the periphery of the pixels and the adjacent sub-pixels, and therefore the problems that the peripheral edges of the sub-pixels emit light and the adjacent sub-pixels crosstalk to emit light can be solved.
According to embodiments of the present invention, the organic light emitting device may be a top emission type device or a bottom emission type device. Referring to fig. 1 and 2, the light emitting layer 400 has a first light emitting surface 420 and a second light emitting surface 430 disposed opposite to each other. The first light emitting surface 420 is close to the light emitting direction of the organic light emitting display device, and the second light emitting surface 430 is far away from the light emitting direction of the organic light emitting display device. That is, referring to fig. 1, when the organic light emitting display device is a bottom light emitting device, light emitted in the light emitting layer 400 is emitted from the substrate 100, and at this time, the electrochromic layer 200 is disposed between the substrate 100 and the first light emitting surface 420. As will be understood by those skilled in the art, since the electrochromic layer 200 may change light transmittance under voltage control, the electrochromic layer 200 is disposed on a side of the anode 300 away from the light emitting layer 400. According to other embodiments of the present invention, referring to fig. 2, when the organic light emitting display device is a top emission device, light emitted from the light emitting layer 400 is emitted from the cathode layer 500, and thus, in order to prevent light leakage from occurring through the electrochromic layer 200, the electrochromic layer 200 is disposed at a side of the cathode 500 away from the first light emitting surface 420.
The respective structures of the organic light emitting display device are explained in detail below according to specific embodiments of the present invention:
the light emission type of the organic light emitting display device is not particularly limited, and the organic light emitting display device may be a bottom light emitting device, a top light emitting device, an active organic light emitting device (AMOLED), or a passive organic light emitting device. The selection can be made by those skilled in the art according to the actual situation.
The material of the substrate and the anode layer is not particularly limited, and can be designed by those skilled in the art according to the circumstances. For example, according to an embodiment of the present invention, when the organic light emitting display device is a bottom emission device, the substrate 100 may be a glass substrate, and the anode layer 300 may be an ITO pixel electrode, so that the transmittance of the emitted light may be improved, and the picture display quality may be improved.
According to an embodiment of the present invention, referring to fig. 4 and 5, the light emitting layer 400 may include a plurality of sub light emitting regions 410, and thus, each sub light emitting region 410 may correspond to each sub pixel, so that light emission of each sub pixel may be realized under the condition that a voltage is applied. In order to space the sub-light emitting regions 410, according to an embodiment of the present invention, a plurality of definition layers 600 may be disposed in the light emitting layer 400, so that light emission of each sub-pixel may be achieved. In order to achieve the application of voltage to each sub-pixel, the anode layer 300 also needs to correspond one-to-one to each sub-pixel. According to an embodiment of the present invention, the anode layer 300 may include a plurality of first sub-electrodes 310, and the first sub-electrodes 310 are disposed in one-to-one correspondence with the sub-light emitting regions 410. Also in order to space the first sub-electrodes 310, according to an embodiment of the present invention, a definition layer 600 may be disposed between the adjacent first sub-electrodes 310. For example, a plurality of the definition layers 600 for spacing the sub-pixels may be first disposed on the substrate 100, and then the first sub-electrodes 310 may be prepared in the regions (i.e., the sub-pixels) defined by the definition layers 600 on the substrate 100. Subsequently, a common light emitting layer 400 is formed. That is, the top of the definition layer 600 is also covered by the light emitting layer 400. This makes it possible to easily provide the light-emitting layer 400. Since the first sub-electrodes 310 are spaced apart from each other, light emission is ideally generated only in the light emitting layer 400 corresponding to the first sub-electrode 310. However, the light-emitting layer 400 on top of the confinement layer 600 may also emit light due to electric field radiation, as well as device aging, Li ion migration, etc., as described above. Thereby causing a problem of crosstalk light emission of adjacent sub-pixels of the organic light emitting device.
According to an embodiment of the present invention, referring to fig. 4 and 5, the organic light emitting display device may further include a filter layer 700. Thus, the light-emitting layer 400 emitting white light can be used, and color display can be realized by the filter layer 700. Therefore, compared with the method of respectively forming the luminescent layers with different luminescent colors, the method can save production cost and simplify production steps. In order to realize that different sub-pixels display different colors, the filter layer 700 needs to correspond to each sub-pixel one by one. According to an embodiment of the invention, the filter layer 700 may include a plurality of color-resisting units 710, and the color-resisting units 710 are disposed in one-to-one correspondence with the sub-light-emitting areas 410. According to an embodiment of the present invention, the color resistance unit 710 may be a red color resistance unit, a green color resistance unit, a blue color resistance unit, or a white color resistance unit. Thus, light generated from the light emitting layer 400 may display different colors, for example, red, green, blue, or white, after passing through the light filtering layer 700. Regarding the position of the filter layer 700, it is necessary to set according to the type of the device, and in general, the filter layer 700 is disposed near the first light emitting surface 420. According to an embodiment of the present invention, referring to fig. 4, when the organic light emitting display device is a bottom emission device, the filter layer 700 is disposed on a side of the anode layer 300 away from the light emitting layer 400. According to further embodiments of the present invention, referring to fig. 5, when the organic light emitting display device is a top emission device, the filter layer 700 is disposed on a side of the cathode layer 500 away from the light emitting layer 400. Thus, light emitted from the light emitting layer 400 can obtain different colors after passing through the light filtering layer 700, so that the device has different color display effects.
According to an embodiment of the present invention, referring to fig. 4 and 5, the electrochromic layer 200 may include a plurality of electrochromic cells 210, the electrochromic cells 210 are disposed in one-to-one correspondence with the color resistance cells 710, and a projection of the electrochromic cells 210 on the substrate 100 covers a projection of the color resistance cells 710 on the substrate 100. Thus, when the sub-pixel is turned on, recombination of electrons and holes occurs in the light-emitting layer 400 to emit light, and positive charges in the charge generation layer are driven by a current to migrate to the non-pixel region and the adjacent sub-pixel region, and are recombined with cathode electrons in the non-pixel region and the adjacent sub-pixel region to emit light. When a sub-pixel is lit, the corresponding electrochromic cell 210 is also energized, increasing the light transmittance. Light generated by the sub-light emitting region 410 is transmitted through the light transmissive electrochromic cell 210, causing the device to emit light. Light generated by the light emitting layers of the non-pixel area and the adjacent sub-pixel area can not pass through the corresponding electrochromic unit because the electrochromic unit is not electrified and is not light-tight, so that the problems of light leakage of the non-pixel area and crosstalk light emission of the adjacent sub-pixel area are solved.
According to an embodiment of the present invention, the electrochromicThe layer 200 may be dark in color when not energized so that light cannot pass through, and the electrochromic layer 200 may be energized so that dark color-changing material is changed to light color transparent state by the action of voltage so that light can pass through. The material of the electrochromic layer is not particularly limited as long as it can transmit light when a voltage is applied and does not transmit light when no voltage is applied, and those skilled in the art can select and design the electrochromic layer according to the circumstances. For example, according to an embodiment of the present invention, the material of the electrochromic layer 200 may include at least one of an insulating electrochromic material and a conductive electrochromic material. Thus, the electrochromic layer can be formed using the materials widely available as described above. When the electrochromic layer 200 uses a conductive electrochromic material according to an embodiment of the present invention, an insulating layer is required to be disposed on the electrochromic layer 200. The specific material of the insulating layer and the electrochromic material is not particularly limited, and the insulating layer may be formed of a conventional insulating material, and the electrochromic material may be formed of tungsten trioxide (WO)3) Polythiophene and its derivatives, viologen, tetrathiafulvalene, metal phthalocyanine compounds, etc. According to other embodiments of the present invention, when the electrochromic layer 200 is made of an insulating electrochromic material, since the electrochromic layer 200 needs to be powered in the present invention, the insulating electrochromic material may be doped to achieve its conductive function in an actual production process.
Regarding the position of the electrochromic layer, it is necessary to design according to the type of device, and in general, the electrochromic layer 200 is disposed on the side of the filter layer 700 away from the first light emitting surface 420. For example, according to an embodiment of the present invention, referring to fig. 4, when the organic light emitting display device is a bottom light emitting device, the electrochromic layer 200 is disposed between the filter layer 700 and the substrate 100. According to other embodiments of the present invention, referring to fig. 5, when the organic light emitting display device is a top emission device, the electrochromic layer 200 is disposed at a side of the filter layer 700 away from the cathode layer 500.
The driving method of the organic light emitting display device is not particularly limited, and those skilled in the art can select the driving method according to the circumstances. For example, the organic light emitting display device may be an active device and may also be a passive device. According to an embodiment of the present invention, when the organic light emitting display device is an active device, the organic light emitting display device may further include a thin film transistor layer and a plurality of scan data lines (not shown). The thin film transistor layer is disposed between the substrate 100 and the anode layer 300, and the scan data lines are connected to the thin film transistors. It will be understood by those skilled in the art that the thin film transistor layer can be used as a switch of the anode layer 300 to control the writing of the voltage in the scan data line. According to an embodiment of the present invention, the thin film transistor layer may include a plurality of thin film transistors, and the thin film transistors are disposed in one-to-one correspondence with the first sub-electrodes 310. Thus, each sub-pixel can be controlled by a thin film transistor.
The connection mode of the electrochromic layer is not particularly limited as long as the electrochromic cells corresponding to the lighting sub-pixels can be energized, and the electrochromic cells not corresponding to the lighting sub-pixels are not energized, and those skilled in the art can design the connection mode according to actual situations. For example, according to an embodiment of the present invention, a thin film transistor may be connected to the first sub-electrode 310 and the electrochromic cell 210 corresponding thereto, and thus the thin film transistor may control the first sub-electrode and the electrochromic cell at the same time. When a sub-pixel is lighted, the corresponding electrochromic unit is also electrified, and the sub-pixel adjacent to the lighted sub-pixel is not lighted, so that the corresponding electrochromic unit is not electrified, the light of the lighted sub-pixel can be transmitted and developed, and although the non-pixel area and the adjacent sub-pixel area around the lighted sub-pixel generate light, the corresponding electrochromic unit is not electrified, and the generated light is not emitted. Therefore, the problems of light leakage in the non-pixel area and crosstalk light emission in the adjacent sub-pixel area can be solved. According to further embodiments of the present invention, the organic light emitting display device may further include a plurality of electrochromic control electrodes (not shown in the drawings), which are connected to the electrochromic cells. When the sub-pixel is lighted, the electrochromic unit corresponding to the sub-pixel is controlled to be electrified through the electrochromic control electrode, so that the light of the sub-pixel is transmitted and developed, and the non-pixel area and the adjacent sub-pixel area are not transmitted because the corresponding electrochromic unit is not electrified.
In another aspect of the present invention, a display device is provided. According to an embodiment of the present invention, the display apparatus includes the organic light emitting display device described above. Thus, the display device has all the features and advantages of the organic light emitting display device described above, and thus, the description thereof is omitted. In general, the display device has a good display effect.
In another aspect of the present invention, a method of controlling an organic light emitting display device is provided. According to an embodiment of the present invention, the organic light emitting display device may be the organic light emitting display device described above. Thus, the organic light emitting display device may have the same features and advantages as those of the organic light emitting display device described above, and thus, detailed description thereof will be omitted. According to an embodiment of the present invention, the organic light emitting display device includes a substrate, an anode layer, a light emitting layer, a cathode layer, and an electrochromic layer. The anode layer, the light emitting layer and the cathode layer are sequentially arranged on the substrate, and the electrochromic layer is arranged between the substrate and the anode layer or on one side of the cathode layer far away from the light emitting layer. According to an embodiment of the present invention, a method of controlling the organic light emitting display device includes: a voltage is applied to the electrochromic layer so that the light transmittance of the electrochromic layer is increased. Therefore, the problems of light leakage in a non-pixel area and crosstalk light emission of adjacent sub-pixels can be solved through simple operation, and the display effect of the device is improved.
The structure of the light emitting layer, the anode layer and the electrochromic layer has been described in detail above, and will not be described in detail here. According to an embodiment of the present invention, the light emitting layer may include a plurality of sub light emitting regions, and the anode layer may include a plurality of first sub electrodes disposed in one-to-one correspondence with the sub light emitting regions. According to the embodiment of the invention, the electrochromic layer can comprise a plurality of electrochromic units, the electrochromic units are arranged in one-to-one correspondence with the sub-light-emitting regions, and the projection of the electrochromic units on the substrate covers the projection of the sub-light-emitting regions on the substrate. Specifically, the same mask can be used to prepare the electrochromic unit and the color resistance unit. By controlling the exposure, the area of the electrochromic unit is enabled to cover the color resistance unit, namely the projection of the electrochromic unit on the substrate covers the projection of the sub-luminous zone on the substrate. Therefore, the problems of light leakage in a non-pixel area and crosstalk light emission in an adjacent sub-pixel area can be solved by arranging the electrochromic layer in the light emitting direction of the light emitting layer.
According to the embodiment of the invention, when the electrochromic layer is not electrified, the electrochromic layer can be in a dark color, so that light cannot penetrate through the electrochromic layer, and when the electrochromic layer is electrified, the dark color material is converted into a light color transparent state due to the action of voltage, so that light can penetrate through the electrochromic layer. The material of the electrochromic layer is not particularly limited as long as it can transmit light when a voltage is applied and does not transmit light when no voltage is applied, and those skilled in the art can select and design the electrochromic layer according to the circumstances. For example, according to an embodiment of the present invention, the material of the electrochromic layer may include at least one of an insulating electrochromic material and a conductive electrochromic material. Thus, the electrochromic layer can be formed using the materials widely available as described above. According to the embodiment of the present invention, when the electrochromic layer is made of a conductive electrochromic material, an insulating layer is required to be disposed on the electrochromic layer. The specific material of the insulating layer and the electrochromic material is not particularly limited, and the insulating layer may be formed of a conventional insulating material, and the electrochromic material may be formed of tungsten trioxide (WO)3) Polythiophene and its derivatives, viologen, tetrathiafulvalene, metal phthalocyanine compounds, etc. According to other embodiments of the present invention, when the electrochromic layer is made of an insulating electrochromic material, since the electrochromic layer needs to be energized in the present invention, the insulating electrochromic material can be doped to achieve its conductive effect in an actual production process.
The driving method of the organic light emitting display device is not particularly limited, and may be selected by those skilled in the art according to actual circumstances. For example, according to an embodiment of the present invention, the organic light emitting display device may be an active device or a passive device. According to an embodiment of the present invention, when the organic light emitting display device is an active device, the organic light emitting display device may further include a plurality of thin film transistors, and the thin film transistors are connected to the correspondingly disposed first sub-electrodes for controlling each sub-pixel.
The connection method of the electrochromic layer has been described in detail above, and will not be described in detail here. According to the embodiment of the invention, when the organic light emitting display device is an active device, the thin film transistor can be connected with the first sub-electrode and the electrochromic unit corresponding to the first sub-electrode, so that the thin film transistor can control the first sub-electrode and the electrochromic unit simultaneously. When the sub-pixel is lighted, the thin film transistor is turned on, voltage is applied to the first sub-electrode and the electrochromic unit, so that the sub-light emitting area corresponding to the first sub-electrode emits light, and meanwhile, the light transmittance of the electrochromic unit is increased, so that light at the sub-pixel is emitted. Since the sub-pixels adjacent to the sub-pixel to be lighted are not lighted, the corresponding electrochromic cells are not electrified, and light generated in the non-pixel area and the adjacent sub-pixel area cannot penetrate through the corresponding electrochromic cells. Therefore, the problems of light leakage in the non-pixel area and crosstalk light emission in the adjacent sub-pixel area can be solved.
According to further embodiments of the present invention, the organic light emitting display device may further include a plurality of electrochromic control electrodes (not shown in the drawings), which are connected to the electrochromic cells. When the sub-pixel is lighted, the electrochromic unit corresponding to the sub-pixel is controlled to be electrified through the electrochromic control electrode, so that the light of the sub-pixel is transmitted and developed, and the non-pixel area and the adjacent sub-pixel area are not transmitted because the corresponding electrochromic unit is not electrified.
In the description of the present invention, the terms "upper", "lower", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention but do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description herein, references to the description of "one embodiment," "another embodiment," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction. In addition, it should be noted that the terms "first" and "second" in this specification are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (8)
1. An organic light emitting display device, comprising:
a substrate;
an anode layer disposed on the substrate;
the light emitting layer is arranged on one side, far away from the substrate, of the anode layer and is provided with a first light emitting surface and a second light emitting surface which are oppositely arranged, the first light emitting surface is close to the light emitting direction of the organic light emitting display device, and the second light emitting surface is far away from the light emitting direction of the organic light emitting display device;
the cathode layer is arranged on one side of the light emitting layer far away from the anode layer; and
an electrochromic layer disposed between the anode layer and the substrate or on a side of the cathode layer away from the light emitting layer,
the filter layer is arranged close to the first light emitting surface, a plurality of color resistance units are arranged in the filter layer, and the color resistance units are arranged corresponding to the sub light emitting areas;
the electrochromic layer is arranged on one side, away from the first light emitting surface, of the filter layer, the electrochromic layer comprises a plurality of electrochromic units, the electrochromic units are in one-to-one correspondence with the color resistance units, and the electrochromic units are in projection on the substrate and cover the color resistance units.
2. The organic light-emitting display device according to claim 1, wherein the light-emitting layer includes a plurality of sub-light-emitting regions spaced apart by a defining layer, and the anode layer includes a plurality of first sub-electrodes arranged in one-to-one correspondence with the sub-light-emitting regions.
3. The organic light-emitting display device according to claim 2, further comprising:
the thin film transistor layer is arranged between the substrate and the anode layer and comprises a plurality of thin film transistors, and the thin film transistors are respectively connected with the first sub-electrodes and the electrochromic units; and
and the scanning data lines are connected with the thin film transistors.
4. The organic light-emitting display device according to claim 1, further comprising:
and the electrochromic control electrodes are connected with the electrochromic units.
5. The organic light-emitting display device according to claim 1, wherein the color resistance unit is a red color resistance unit, a green color resistance unit, a blue color resistance unit, or a white color resistance unit.
6. The organic light emitting display device of claim 1, wherein a material forming the electrochromic layer comprises at least one of an insulating electrochromic material and a conductive electrochromic material.
7. A display apparatus comprising the organic light emitting display device according to any one of claims 1 to 6.
8. A method for controlling an organic light emitting display device, the organic light emitting display device comprising a substrate, and an anode layer, a light emitting layer and a cathode layer sequentially disposed on the substrate, wherein an electrochromic layer is disposed between the substrate and the anode layer or on a side of the cathode layer away from the light emitting layer, the method comprising:
applying a voltage to the electrochromic layer so that a light transmittance of the electrochromic layer is increased,
the luminescent layer includes a plurality of sub-luminescent regions, the anode layer is provided with the first sub-electrode with sub-luminescent region one-to-one, electrochromic layer includes a plurality of electrochromic units, the projection of electrochromic unit on the base plate covers sub-luminescent region is in the projection on the base plate, organic light emitting display device further includes a plurality of thin film transistors, thin film transistor respectively with correspond the setting first sub-electrode and electrochromic unit links to each other, apply voltage to electrochromic layer further includes:
and opening the thin film transistor, and applying voltage to the first sub-electrode and the electrochromic unit so as to enable the sub-luminous zone corresponding to the first sub-electrode to emit light and enable the light transmittance of the electrochromic unit to be increased.
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| CN108987451B (en) * | 2018-08-01 | 2021-09-24 | 京东方科技集团股份有限公司 | Display panel, control method thereof and display device |
| CN109148544B (en) * | 2018-08-30 | 2022-01-25 | 合肥鑫晟光电科技有限公司 | Transparent display panel, preparation method thereof and display device |
| CN109887981B (en) * | 2019-03-20 | 2021-02-23 | 业成科技（成都）有限公司 | Organic light emitting diode display panel and manufacturing method thereof |
| CN111029382A (en) * | 2019-12-13 | 2020-04-17 | 合肥维信诺科技有限公司 | Display panel, multi-area display panel and display device |
| CN111025778B (en) * | 2020-01-02 | 2021-09-28 | 京东方科技集团股份有限公司 | Liquid crystal box and electronic equipment |
| CN113013210B (en) * | 2021-02-19 | 2023-12-26 | 京东方科技集团股份有限公司 | Display substrate, preparation method thereof and display device |
| CN112951894A (en) * | 2021-03-09 | 2021-06-11 | 昆山龙腾光电股份有限公司 | OLED display panel and manufacturing method thereof |
| CN112928149A (en) * | 2021-04-02 | 2021-06-08 | 维沃移动通信有限公司 | Display panel and electronic device |
| CN115167052A (en) * | 2022-07-18 | 2022-10-11 | 重庆长安汽车股份有限公司 | Display substrate based on light ray control, manufacturing method, display screen and vehicle |
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