CN109285858B - Double-sided display panel and display device - Google Patents
Double-sided display panel and display device Download PDFInfo
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- CN109285858B CN109285858B CN201710589512.XA CN201710589512A CN109285858B CN 109285858 B CN109285858 B CN 109285858B CN 201710589512 A CN201710589512 A CN 201710589512A CN 109285858 B CN109285858 B CN 109285858B
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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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- 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
- H10K59/126—Shielding, e.g. light-blocking means over the TFTs
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Abstract
The embodiment of the invention discloses a double-sided display panel and a display device, wherein the double-sided display panel comprises a substrate base plate; a plurality of organic light emitting units on the substrate, the plurality of organic light emitting units including a plurality of first type organic light emitting units and a plurality of second type organic light emitting units; the first shading layer is positioned on one side of the first organic light-emitting unit, and the vertical projection of the first shading layer covers the vertical projection of the first organic light-emitting unit, so that the light-emitting direction of the first organic light-emitting unit is the direction from the first organic light-emitting unit to the substrate; the second shading layer is positioned on one side of the second type of organic light-emitting unit, and the vertical projection of the second shading layer covers the vertical projection of the second type of organic light-emitting unit; the light emitting direction of the second organic light emitting unit is the direction from the substrate to the second organic light emitting unit, so that the double-sided display panel is ensured to realize double-sided display, and the display panel is simple to set and easy to realize thin setting.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a double-sided display panel and a display device.
Background
An Organic Light-Emitting Display (OLED) is an active Light-Emitting device, has the advantages of high contrast, wide viewing angle, low power consumption, thinner volume, and the like, is expected to become the next generation of mainstream flat panel Display technology, and is one of the most concerned technologies in the flat panel Display technology at present.
With the progress of information transmission and the development of electronic products, research and development improvements are continuously made in aspects of response speed, resolution and image quality of organic light emitting display devices, and breakthroughs in functions or display modes are pursued. Therefore, double-sided display is also an important direction for the development of future display devices, can extend the picture space, broaden the visual field, quickly switch and process more works, and has great potential application value in the fields of advertisement display, video conferences and the like.
Most of the conventional dual-sided display devices are assembled back to back with two independent display units to achieve the dual-sided display effect. Although the double-sided display device can realize double-sided display, the thickness of the double-sided display device is twice that of a single-sided display device, namely the thickness of the double-sided display device is equal to the thickness of the single-sided display device which is opposite to the thickness of the single-sided display device, the double-sided display device is higher in cost and larger in size, and the double-sided display device does not accord with the development.
Disclosure of Invention
In view of this, embodiments of the present invention provide a dual-sided display panel and a display device to solve the technical problems of high cost and large volume of the existing dual-sided display device.
In a first aspect, an embodiment of the present invention provides a dual-sided display panel, including:
a substrate base plate;
a plurality of organic light emitting units on the substrate, the plurality of organic light emitting units including a plurality of first type organic light emitting units and a plurality of second type organic light emitting units;
the first shading layer is positioned on one side, far away from the substrate, of the first-class organic light-emitting unit, and the vertical projection of the first shading layer on the substrate covers the vertical projection of the first-class organic light-emitting unit on the substrate, so that the light-emitting direction of the first-class organic light-emitting unit is the direction from the first-class organic light-emitting unit to the substrate;
a second light shielding layer positioned on one side of the second type organic light-emitting unit close to the substrate, wherein the vertical projection of the second light shielding layer on the substrate covers the vertical projection of the second type organic light-emitting unit on the substrate; and the light emitting direction of the second type organic light emitting unit is the direction from the substrate base plate to the second type organic light emitting unit.
In a second aspect, an embodiment of the present invention further provides a display device, including the dual-sided display panel according to the first aspect.
The double-sided display panel and the display device provided by the embodiment of the invention have the advantages that the double-sided display panel comprises a plurality of first-type organic light-emitting units, a plurality of second-type organic light-emitting units, a first light-shielding layer and a second light-shielding layer, the vertical projection of the first light-shielding layer on the substrate covers the vertical projection of the first-type organic light-emitting units on the substrate, the light-emitting direction of the first-type organic light-emitting units is ensured to be the direction from the first-type organic light-emitting units to the substrate, the vertical projection of the second light-shielding layer on the substrate covers the vertical projection of the second-type organic light-emitting units on the substrate, the light-emitting direction of the second-type organic light-emitting units is ensured to be the direction from the substrate to the second-type organic light-emitting units, so that the double-sided display panel can realize double-sided display, the double-sided display panel is ensured to be arranged in a light and thin mode, and cost is saved.
Drawings
In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, a brief description is given below of the drawings used in describing the embodiments. It should be clear that the described figures are only views of some of the embodiments of the invention to be described, not all, and that for a person skilled in the art, other figures can be derived from these figures without inventive effort.
Fig. 1 is a schematic structural diagram of a dual-sided display panel according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an arrangement of organic light emitting units according to an embodiment of the present invention;
FIG. 3a is a schematic structural diagram of a first type of pixel driving circuit according to an embodiment of the present invention;
FIG. 3b is a schematic structural diagram of a second type of pixel driving circuit according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of another dual-sided display panel according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of another dual-sided display panel according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of another dual-sided display panel according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of another dual-sided display panel according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be fully described by the detailed description with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are a part of the embodiments of the present invention, not all embodiments, and all other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without inventive efforts fall within the scope of the present invention.
Fig. 1 is a schematic structural diagram of a dual-sided display panel according to an embodiment of the present invention, and referring to fig. 1, the dual-sided display panel according to the embodiment of the present invention may include:
a base substrate 10;
a plurality of organic light emitting units 20 on the substrate, the plurality of organic light emitting units 20 may include a first type organic light emitting unit 210 and a second type organic light emitting unit 220;
the first light shielding layer 310 is positioned on the first organic light emitting unit 210 far away from the substrate 10, and the vertical projection of the first light shielding layer 310 on the substrate 10 covers the vertical projection of the first organic light emitting unit 210 on the substrate 10, so that the light outgoing direction of the first organic light emitting unit 210 is the direction from the first organic light emitting unit 210 to the substrate 10;
and the second light shielding layer 320 is positioned on the second type organic light emitting unit 220 close to the substrate 10, and the vertical projection of the second light shielding layer 320 on the substrate 10 covers the vertical projection of the second type organic light emitting unit 220 on the substrate 10, so that the light outgoing direction of the second type organic light emitting unit 220 is a direction from the substrate 10 to the second type organic light emitting unit 220.
As shown in fig. 1, fig. 2 has been exemplarily illustrated with one first type organic light emitting unit 210 and one second type organic light emitting unit 220 as an example. The first light shielding layer 310 is located on a side of the first organic light emitting unit 210 away from the substrate 10, and a vertical projection of the first light shielding layer 310 on the substrate 10 covers a vertical projection of the first organic light emitting unit 210 on the substrate 10, so that the first light shielding layer 310 can completely shield light emitted by the first organic light emitting unit 210 from propagating towards a direction in which the substrate 10 points to the first organic light emitting unit 210, and ensure that the light emitted by the first organic light emitting unit 210 propagates towards a direction in which the first organic light emitting unit 210 points to the substrate 10, so that a light emitting direction of the first organic light emitting unit 210 is a first preset direction, that is, the first organic light emitting unit 210 points to the substrate 10.
Similarly, the second light shielding layer 320 is located on one side of the second type organic light emitting unit 220 close to the substrate 10, and the vertical projection of the second type organic light emitting unit 220 on the substrate 10 is covered by the second light shielding layer 320, so that the second light shielding layer 320 can completely shield the light emitted by the second type organic light emitting unit 220 from propagating toward the direction in which the second type organic light emitting unit 220 points to the substrate 10, and ensure that the light emitted by the second type organic light emitting unit 220 propagates toward the direction in which the substrate 10 points to the second type organic light emitting unit 220, so that the light emitting direction of the second type organic light emitting unit 220 is the second preset direction, that is, the substrate 10 points to the second type organic light emitting unit 220.
Thus, the light emitting direction of the first organic light emitting unit 210 is the direction in which the first organic light emitting unit 210 points to the substrate base plate 10, the light emitting direction of the second organic light emitting unit 220 is the side in which the substrate base plate 10 points to the second organic light emitting unit 220, and the light emitting direction of the first organic light emitting unit 210 is opposite to the light emitting direction of the second organic light emitting unit 220, so that the light emitting direction of the whole double-sided display panel is opposite, and the double-sided display panel is ensured to realize double-sided display.
Optionally, the plurality of organic light emitting units 20 are arranged in a matrix, wherein the first type organic light emitting units 210 and the second type organic light emitting units 220 are arranged at intervals along a row direction and/or a column direction of the matrix. For example, the light emitting direction of the first organic light emitting units 210 is set to be a direction from the first organic light emitting units 210 to the substrate 10, and the light emitting direction of the second organic light emitting units 220 is set to be a direction from the substrate 10 to the second organic light emitting units 220, so as to implement dual-sided display of the dual-sided display panel. Optionally, a plurality of first-type organic light emitting units 210 may be arranged in rows, a plurality of second-type organic light emitting units 220 may be arranged in rows, and the first-type organic light emitting units 210 and the second-type organic light emitting units 220 are arranged at intervals, for example, the first-type organic light emitting units 210 are located in odd-numbered rows, and the second-type organic light emitting units 220 are located in even-numbered rows, so as to implement dual-sided display of the dual-sided display panel. Alternatively, the first type organic light emitting units 210 and the second type organic light emitting units 220 may be arranged in the same row and/or the same column. Optionally, fig. 2 is a schematic arrangement diagram of an organic light emitting unit according to an embodiment of the present invention, as shown in fig. 2, fig. 2 only illustrates that a plurality of first type organic light emitting units 210 are arranged in a row, a plurality of second type organic light emitting units 220 are arranged in a row, and the first type organic light emitting units 210 and the second type organic light emitting units 220 are arranged at intervals in an example. It should be noted that other arrangements of the first type organic light emitting units 210 and the second type organic light emitting units 220 are also included in the embodiments of the present invention, and are not described herein again.
Optionally, the substrate base plate 10 may be a flexible base plate, and the material thereof may include at least one of polyimide, polyethylene terephthalate, polyethylene naphthalate, polycarbonate, polyarylate, and polyethersulfone; the substrate 10 may also be a rigid substrate, specifically a glass substrate or other rigid substrate. The embodiment of the present invention does not limit the kind and material of the substrate base 10.
Alternatively, as shown in fig. 1, the first type organic light emitting unit 210 may include a first electrode 211, a second electrode 212, and a first light emitting function layer 213 between the first electrode 211 and the second electrode 212. Optionally, the first electrode 211 is located at a side close to the substrate base plate 10, the second electrode 212 is located at a side far from the substrate base plate 10, the first electrode 211 may be an anode electrode of the first type organic light emitting unit 210, and the second electrode 212 may be a cathode electrode of the first type organic light emitting unit 210. The first organic light emitting function layer 213 may include a hole injection layer, a hole transport layer, an emission layer, an electron transport layer, and an electron injection layer, which are sequentially stacked. Alternatively, the first organic light emitting function layer 213 may be formed using a low molecular or high molecular organic material. Alternatively, as shown in fig. 1 with continued reference, the second type organic light emitting unit 220 may include a third electrode 221, a fourth electrode 222, and a second light emitting function layer 223 between the third electrode 221 and the fourth electrode 222. Alternatively, the third electrode 221 is located at a side close to the substrate base plate 10, the fourth electrode 222 is located at a side far from the substrate base plate 10, the third electrode 221 may be an anode electrode of the second type organic light emitting unit 220, and the fourth electrode 222 may be a cathode electrode of the second type organic light emitting unit 220. The second organic light emitting function layer 223 may include a hole injection layer, a hole transport layer, an emission layer, an electron transport layer, and an electron injection layer, which are sequentially stacked. Alternatively, the second organic light emitting function layer 223 may be formed using a low molecular or high molecular organic material.
Alternatively, the materials of the first electrode 211, the second electrode 212, the third electrode 221, and the fourth electrode 222 may be transparent conductive materials, and specifically, the materials of the first electrode 211, the second electrode 212, the third electrode 221, and the fourth electrode 222 may include at least one of indium tin oxide and indium zinc oxide.
Alternatively, as shown in fig. 1, the first organic light emitting unit 210 and the second organic light emitting unit 220 may further include a pixel defining layer 224, the pixel defining layer 224 is sandwiched between the first electrode 211 and the second electrode 212, and between the third electrode 221 and the fourth electrode 222, and the pixel defining layer 224 may prevent or reduce color mixing between pixels. Alternatively, the material of the pixel defining layer 224 may include at least one of organic insulating materials such as polyimide, polyamide, acrylic resin, benzocyclobutene, and phenol resin; the pixel defining layer 224 may also include SiO2、SiNx、Al2O3、CuOx、Tb4O7、Y2O3、Nb2O5And Pr2O3At least one of inorganic insulating materials; also, the pixel defining layer 224 may have a multi-layer structure in which an organic insulating material and an inorganic insulating material are alternately formed.
Optionally, with continuing reference to fig. 1, the dual-sided display panel provided in the embodiment of the present invention may further include a plurality of pixel driving circuits 40, where the plurality of pixel driving circuits 40 may include a plurality of first-type pixel driving circuits 410 and a plurality of second-type pixel driving circuits 420, and fig. 1 only illustrates that one pixel driving circuit 40 includes one first-type pixel driving circuit 410 and one second-type pixel driving circuit 420;
the first pixel driving circuit 410 is used for driving the first organic light emitting unit 210, and the second pixel driving circuit 420 is used for driving the second organic light emitting unit 220.
For example, the first pixel driving circuit 410 may include a plurality of thin film transistors and a plurality of storage capacitors, and the second pixel driving circuit 420 may also include a plurality of thin film transistors and a plurality of storage capacitors, and the embodiment of the invention is described by taking an example that the first pixel driving circuit 410 and the second pixel driving circuit 420 each include two thin film transistors and one storage capacitor. As shown in particular in fig. 3a and 3 b.
Optionally, fig. 3a is a schematic structural diagram of a first type of pixel driving circuit according to an embodiment of the present invention, as shown in fig. 3a, the first type of pixel driving circuit 410 may include a first thin film transistor 411, a second thin film transistor 412, and a first storage capacitor 413, the first thin film transistor 411 may include a first source 4111, a first gate 4112, and a first drain 4113, the second thin film transistor 412 may include a second source 4121, a second gate 4122, and a second drain 4123, and the first storage capacitor 413 may include a first capacitor substrate 4131 and a second capacitor substrate 4132; the first source 4111 and the data line VdateElectrically connected to the first gate 4112 and the scan line VscanThe first drain 4113 is electrically connected to the second gate 4122, the second source 4121 receives the power signal VDD, the second drain 4123 is electrically connected to the first type organic light emitting unit 210, the first drain 4113 is further electrically connected to the first capacitor substrate 4131, and the second capacitor substrate 4132 is grounded. As shown in fig. 3a, the first thin film transistor 411 is used as a control switch, and the second thin film transistor 412 is used as a driving switch, which together drive the first type organic light emitting unit 210 to emit light。
Optionally, fig. 3b is a schematic structural diagram of a second type of pixel driving circuit provided in the embodiment of the present invention, as shown in fig. 3b, the second type of pixel driving circuit 420 may include a third thin film transistor 421, a fourth thin film transistor 422, and a second storage capacitor 423, the third thin film transistor 421 may include a third source electrode 4211, a third gate electrode 4212, and a third drain electrode 4213, the fourth thin film transistor 422 may include a fourth source electrode 4221, a fourth gate electrode 4222, and a fourth drain electrode 4223, and the second storage capacitor 423 may include a third capacitor substrate 4231 and a fourth capacitor substrate 4232; wherein the third source electrode 4211 and the data line VdateElectrically connected to the third gate electrode 4212 and the scan line VscanThe third drain electrode 4213 is electrically connected to the fourth gate electrode 4222, the fourth source electrode 4221 receives the power supply signal VDD, the fourth drain electrode 4223 is electrically connected to the second type organic light emitting cell 420, the third drain electrode 4213 is further electrically connected to the third capacitor substrate 4231, and the fourth capacitor substrate 4232 is grounded. As shown in fig. 3b, the third thin film transistor 421 serves as a control switch, and the fourth thin film transistor 422 serves as a driving switch, which together drive the second type organic light emitting unit 220 to emit light.
It should be noted that fig. 1 is a schematic cross-sectional view, and due to the relationship of the positions of cross-sectional lines, only the second thin film transistor 412 and the first storage capacitor 413 are shown in the first driving circuit 410 shown in fig. 1, and only the fourth thin film transistor 422 and the second storage capacitor 423 are shown in the second driving circuit 420. As shown in fig. 1, the second thin film transistor 412 may further include a second active layer 4124, and the fourth thin film transistor 422 may further include a fourth active layer 4224. As shown in fig. 1, the second source electrode 4121 and the second drain electrode 4123 are electrically connected to the second active layer 4124, and the fourth source electrode 4221 and the fourth drain electrode 4223 are electrically connected to the fourth active layer 4224. Optionally, the first capacitor substrate 4131 or the second capacitor substrate 4132 of the first storage capacitor 413 may be disposed at the same layer as the second gate 4122, and the third capacitor substrate 4231 or the fourth capacitor substrate 4232 of the second storage capacitor 423 may be disposed at the same layer as the fourth gate 4222, as shown in fig. 1, the second capacitor substrate 4132 and the second gate 4122 are disposed at the same layer, and the fourth capacitor substrate 4232 and the fourth gate 4222 are disposed at the same layer as each other.
Optionally, fig. 4 is a schematic structural diagram of another dual-sided display panel according to an embodiment of the present invention, and the dual-sided display panel shown in fig. 4 is different from the dual-sided display panel described in the foregoing embodiment in that the second source 4121 is further electrically connected to the first capacitor substrate 4131 of the first storage capacitor 413, and the fourth source 4221 is further electrically connected to the third capacitor substrate 4231 of the second storage capacitor. As shown in fig. 4, fig. 4 is a schematic cross-sectional view, and due to the relationship of the positions of cross-sectional lines, only the second thin film transistor 412 and the first storage capacitor 413 are shown in the first driving circuit 410 shown in fig. 4, only the fourth thin film transistor 422 and the second storage capacitor 423 are shown in the second driving circuit 420, and the cross-sectional view shown in fig. 4 does not show the electrical connection relationship between the second source 4121 and the second active layer 4124, and does not show the electrical connection relationship between the fourth source 4221 and the fourth active layer 4224, but as a basic knowledge in the art, it is known that the second source 4121 and the second active layer 4124 are in electrical connection relationship, and the fourth source 4221 and the fourth active layer 4224 are in electrical connection relationship. As shown in fig. 4, the second source 4121 is electrically connected to the first capacitor substrate 4131 of the first storage capacitor 413, and the second source 4121 is also electrically connected to the second active layer 4124, so that the first capacitor substrate 4131 of the first storage capacitor is equal to the second active layer 4124 in potential, and thus, the capacitor formed between the first capacitor substrate 4131 and the second capacitor substrate 4132 is connected in parallel to the capacitor formed between the second capacitor substrate 4132 and the second active layer 4124, which ensures that the whole first-type pixel driving circuit 410 has a larger capacitor and the first-type pixel driving circuit has a better driving effect; similarly, the fourth source electrode 4221 is electrically connected to the third capacitor substrate 4231 of the second storage capacitor, and the fourth source electrode 4221 is also electrically connected to the fourth active layer 4224, so that the third capacitor substrate 4231 of the second storage capacitor is equal in potential to the fourth active layer 4224, and thus, a capacitor formed between the third capacitor substrate 4231 and the fourth capacitor substrate 4232 is connected in parallel with a capacitor formed between the fourth capacitor substrate 4232 and the fourth active layer 4224, which ensures that the whole second-type pixel driving circuit 420 has a larger capacitor and ensures that the second-type pixel driving circuit has a better driving effect.
Optionally, with continued reference to fig. 1, the vertical projection of the first light shielding layer 310 on the substrate 10 may cover the vertical projection of the first type of pixel driving circuit 410 on the substrate 10, and the vertical projection of the second light shielding layer 320 on the substrate 10 may cover the vertical projection of the second type of pixel driving circuit 420 on the substrate 10; or the vertical projection of the first light shielding layer 310 on the substrate 10 covers the vertical projection of the first pixel driving circuit 410 and the second pixel driving circuit 420 on the substrate 10 (not shown in the figure).
Illustratively, since the light emitting direction of the first type organic light emitting unit 210 is a direction pointing from the first type organic light emitting unit 210 to the substrate 10, and the first type pixel driving circuit 410 and the second type pixel driving circuit 420 are disposed between the substrate 10 and the organic light emitting unit 20, when the vertical projection of the first light shielding layer 310 on the substrate 10 can cover the vertical projection of the first type pixel driving circuit 410 on the substrate 10, the first source 4111, the first gate 4112 and the first drain 4113 of the first thin film transistor 411 in the first type pixel driving circuit 410, the second source 4121, the second gate 4122 and the second drain 4123 of the second thin film transistor 412 can be disposed, the materials of the first capacitor substrate 4131 and the second capacitor substrate 4132 of the first storage capacitor 413 are transparent conductive materials, such as at least one of indium tin oxide and indium zinc oxide, it is ensured that the first pixel driving circuit 410 does not block the light emitted by the first organic light emitting unit 210, and the aperture ratio of the dual-sided display panel is not affected. When the vertical projection of the first light shielding layer 310 on the substrate 10 covers the vertical projection of the first type pixel driving circuit 410 and the second type pixel driving circuit 420 on the substrate 10, the first source 4111, the first gate 4112 and the first drain 4113 of the first thin film transistor 411 in the first type pixel driving circuit 410, the second source 4121, the second gate 4122 and the second drain 4123 of the second thin film transistor 412, the first capacitor substrate 4131 and the second capacitor substrate 4132 of the first storage capacitor 413, and the third source 4211, the third gate 4212 and the third drain 4213 of the third thin film transistor 421 in the second type pixel driving circuit 420, the fourth source 4221, the fourth gate 4222 and the fourth drain 4223 of the fourth thin film transistor 422, the third capacitor substrate 4231 and the fourth capacitor substrate 4231 of the second storage capacitor 423 are made of a transparent conductive material, such as at least one of indium tin oxide and zinc oxide, the first pixel driving circuit 410 and the second pixel driving circuit 420 are ensured not to block the light emitted by the first organic light emitting unit 210, and the aperture ratio of the dual-sided display panel is not affected. In addition, the first pixel driving circuit 410 and the second pixel driving circuit 420 are 2T1C, so that the number of thin film transistors and storage capacitors can be reduced, the influence of the thin film transistors and the storage capacitors on the light emission of the first organic light emitting unit 210 can be reduced, and the aperture ratio of the dual-sided display panel can be ensured to the maximum extent.
Optionally, as 5 is a schematic structural diagram of another dual-sided display panel provided in the embodiment of the present invention, the difference between the dual-sided display panel shown in fig. 5 and the dual-sided display panel described in the foregoing embodiment is that the vertical projection of the second light shielding layer 320 on the substrate 10 covers the vertical projection of the first type pixel driving circuit 410 and the second type pixel driving circuit 420 on the substrate 10. As shown in fig. 5, since the light emitting direction of the second type organic light emitting unit 220 is from the substrate 10 to the side of the second type organic light emitting unit 220, and the first type pixel driving circuit 410 and the second type pixel driving circuit 420 are located between the second type organic light emitting unit 220 and the substrate 10, the vertical projection of the second light shielding layer 320 on the substrate 10 covers the vertical projection of the first type pixel driving circuit 410 and the second type pixel driving circuit 420 on the substrate 10, even if the electrodes or the capacitor substrates in the first type pixel driving circuit 410 and the second type pixel driving circuit 420 are not transparent, the first type pixel driving circuit 410 and the second type pixel driving circuit 420 do not affect the propagation of the light emitted by the second type organic light emitting unit 220, and do not affect the aperture ratio of the dual-sided display panel.
Optionally, with continued reference to fig. 1, the dual-sided display panel provided in the embodiment of the present invention may further include a planarization layer 50, and the planarization layer 50 may be located between the organic light emitting unit 20 and the pixel driving circuit 40. The planarization layer 50 may be used to planarize the pixel driving circuit 40 thereunder, providing a planarization preparation condition for the organic light emitting unit 20. Alternatively, the planarization layer 50 may be formed using an organic material including benzocyclobutene or acrylic, or an inorganic material including silicon nitride, and the planarization layer 50 may be formed as a single layer, a double layer, or a multi layer. The planarization layer 50 may include a light-transmitting region 501 and a light-shielding region 502, where the light-transmitting region 501 is disposed corresponding to the first type organic light-emitting unit 210, that is, a vertical projection of the light-transmitting region 501 on the substrate 10 covers a vertical projection of the first type organic light-emitting unit 210 on the substrate 10, so as to ensure that light emitted by the first type organic light-emitting unit 210 and directed to one side of the substrate 10 passes through, and ensure that a light-emitting direction of the first type organic light-emitting unit 210 is a direction from the first type organic light-emitting unit 210 to the substrate 10; the light-shielding region 502 is disposed corresponding to the second type organic light-emitting unit 220, that is, the vertical projection of the light-shielding region 502 on the substrate 10 covers the vertical projection of the second type organic light-emitting unit 220 on the substrate 10, so as to ensure that the light emitted by the second type organic light-emitting unit 220 and directed to one side of the substrate 10 is shielded, and the light-emitting direction of the second type organic light-emitting unit 220 is the direction from the substrate 10 to the second type organic light-emitting unit 220. Thus, the portion of the planarization layer 50 located in the light-shielding region 502 is the second light-shielding layer 320. In summary, the planarization layer 50 including the light-transmitting region 501 and the light-shielding region 502 can provide planarization protection for the organic light-emitting unit 20, and the portion of the light-shielding region 502 in the planarization layer 50 can be used as the second light-shielding layer 320, and the arrangement of the light-shielding layer 320 does not increase the film structure of the entire dual-sided display panel, thereby ensuring that the dual-sided display panel is easy to manufacture and a dual-sided display panel with a thinned structure is easy to form.
Optionally, fig. 6 is a schematic structural diagram of another dual-sided display panel according to an embodiment of the present invention, and the difference between the dual-sided display panel shown in fig. 6 and the dual-sided display panel described in the foregoing embodiment is that the second light shielding layer 320 is disposed between the substrate 10 and the pixel driving circuit 40. As shown in fig. 6, the second light shielding layer 320 is disposed between the substrate 10 and the pixel driving circuit 40, and is used for shielding the light emitted by the second type organic light emitting unit 220 and directed to one side of the substrate 10, so as to ensure that the light emitting direction of the second type organic light emitting unit 220 is the direction from the substrate 10 to the second type organic light emitting unit 220. In this way, the second light shielding layer 320 is arranged between the substrate 10 and the pixel driving circuit 40, the second light shielding layer 320 can be a black matrix layer and can be obtained by using a black pigment dispersion type photoresist through a photolithography process, the preparation method of the second light shielding layer 320 is simple, the planarization layer 50 does not need to be provided with a light shielding region and a light shielding region, the arrangement mode of the planarization layer 50 is simple, and the preparation efficiency of the double-sided display panel is improved.
Optionally, fig. 7 is a schematic structural diagram of another dual-sided display panel according to an embodiment of the present invention, and the dual-sided display panel shown in fig. 7 is different from the dual-sided display panel described in the foregoing embodiment in that the second light shielding layer 320 may include a third light shielding layer 321 and a fourth light shielding layer 322, the third light shielding layer 321 is located between the pixel driving circuit 40 and the second-type organic light emitting unit 220, the fourth light shielding layer 322 is located between the substrate 10 and the pixel driving circuit 40, a vertical projection of the third light shielding layer 321 on the substrate 10 covers vertical projections of the first-type pixel driving circuit 410 and the second-type pixel driving circuit 420 on the substrate 10, and a vertical projection of the fourth light shielding layer 322 on the substrate 10 also covers vertical projections of the first-type pixel driving circuit 410 and the second-type pixel driving circuit 420 on the substrate 10. As shown in fig. 7, the light emitting direction of the second type organic light emitting unit 220 is a direction in which the substrate 10 points to the second type organic light emitting unit 220, so that the vertical projections of the third light shielding layer 321 and the fourth light shielding layer 322 on the substrate 10 both cover the vertical projections of the first type pixel driving circuit 410 and the second type pixel driving circuit 420 on the substrate 10, and it can be ensured that the first type pixel driving circuit 410 and the second type pixel driving circuit 420 do not affect the propagation of the light emitted by the second type organic light emitting unit 220, and the aperture ratio of the dual-sided display panel is not affected. Meanwhile, the fourth light shielding layer 322 is disposed between the substrate 10 and the pixel driving circuit 40, so that the first pixel driving circuit 410 and the second pixel driving circuit 420 can be prevented from reflecting outside light, no light is emitted from one side of the second organic light emitting unit 220 pointing to the substrate 10, and the display contrast of the dual-sided display panel is ensured to be good; moreover, the third light shielding layer 321 is disposed between the pixel driving circuit 40 and the second type organic light emitting unit 220, so that the light emitted by the second type organic light emitting unit 220 can be prevented from affecting the thin film transistors in the first type pixel driving circuit 410 and the second type pixel driving circuit 420; the fourth light shielding layer 322 is disposed between the substrate 10 and the pixel driving circuit 40, so as to prevent external light incident from the substrate 10 from affecting the thin film transistors in the first type pixel driving circuit 410 and the second type pixel driving circuit 420; the reason is that the thin film transistor is a photosensitive element, the third light shielding layer 321 is disposed between the pixel driving circuit 40 and the second type organic light emitting unit 220, and the fourth light shielding layer 322 is disposed between the substrate 10 and the pixel driving circuit 40, so that the increase of the leakage current of the thin film transistor caused by the light emitted by the second type organic light emitting unit 220 and the external light can be avoided, the characteristics of the thin film transistor in the first type pixel driving circuit 410 and the second type pixel driving circuit 420 are good, and the good display effect of the dual-sided display panel is ensured. Optionally, the portion of the planarization layer 50 located in the light-shielding region 502 may be a third light-shielding layer 321, which is easy to form a dual-sided display panel with a thinned structure.
Optionally, with continued reference to fig. 1, the dual-sided display panel provided in the embodiment of the present invention may further include a thin film encapsulation layer 60, where the thin film encapsulation layer 60 is located on a side of the organic light emitting unit 20 away from the substrate 10. Alternatively, the thin film encapsulation layer 60 may be used to encapsulate and protect the organic light emitting unit 20, for example, to prevent water and oxygen from corroding the organic light emitting unit 20. Optionally, the thin film encapsulation layer 60 may include an encapsulation structure in which an inorganic layer and an organic layer are stacked, for example, a three-layer encapsulation structure of an inorganic layer-an organic layer-an inorganic layer, a five-layer encapsulation structure of an inorganic layer-an organic layer-an inorganic layer, or other encapsulation structures.
Optionally, the first light shielding layer 310 may be located between the first type organic light emitting unit 210 and the thin film encapsulation layer 60, or the first light shielding layer 310 may be located on one side of the thin film encapsulation layer 60, which is far from the first type organic light emitting unit 210, and fig. 1 illustrates that only the first light shielding layer 310 is located between the thin film encapsulation layer 60 and the first type organic light emitting unit 210.
Optionally, with continued reference to fig. 1, the double-sided display panel according to the embodiment of the present invention may further include a buffer layer 70, where the buffer layer 70 may be located between the substrate 10 and the pixel driving circuit 40, and the buffer layer 70 is used to buffer and protect the pixel driving circuit 40, so as to prevent external impurities from entering the pixel driving circuit 40. Alternatively, the material of the buffer layer 70 may be silicon oxide or silicon nitride.
Optionally, an embodiment of the present invention further provides a display device, where the display device may include the dual-sided display panel according to any embodiment of the present invention. The display device may be a double-sided display television, a double-sided display billboard, or other display devices, which is not particularly limited in this embodiment of the present invention.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (9)
1. A dual-sided display panel, comprising:
a substrate base plate;
a plurality of organic light emitting units on the substrate, the plurality of organic light emitting units including a plurality of first type organic light emitting units and a plurality of second type organic light emitting units;
the first shading layer is positioned on one side, far away from the substrate, of the first-class organic light-emitting unit, and the vertical projection of the first shading layer on the substrate covers the vertical projection of the first-class organic light-emitting unit on the substrate, so that the light-emitting direction of the first-class organic light-emitting unit is the direction from the first-class organic light-emitting unit to the substrate;
a second light shielding layer positioned on one side of the second type organic light-emitting unit close to the substrate, wherein the vertical projection of the second light shielding layer on the substrate covers the vertical projection of the second type organic light-emitting unit on the substrate; the light emitting direction of the second type organic light emitting unit is the direction from the substrate base plate to the second type organic light emitting unit;
the first type organic light-emitting units are arranged in rows, the second type organic light-emitting units are arranged in rows, and the first type organic light-emitting units and the second type organic light-emitting units are arranged at intervals;
the double-sided display panel also comprises a plurality of pixel driving circuits, wherein the plurality of pixel driving circuits comprise a plurality of first pixel driving circuits and a plurality of second pixel driving circuits;
the first pixel driving circuit is used for driving the first organic light-emitting unit to emit light, and the second pixel driving circuit is used for driving the second organic light-emitting unit;
the vertical projection of the second light shielding layer on the substrate covers the vertical projection of the first pixel driving circuit and the second pixel driving circuit on the substrate.
2. The dual-sided display panel of claim 1, wherein the first pixel driving circuit comprises a first thin film transistor, a second thin film transistor and a first storage capacitor, the first thin film transistor comprises a first source electrode, a first gate electrode and a first drain electrode, the second thin film transistor comprises a second source electrode, a second gate electrode and a second drain electrode, and the first storage capacitor comprises a first capacitor substrate and a second capacitor substrate;
the first source electrode is electrically connected with a data line, the first grid electrode is electrically connected with a scanning line, the first drain electrode is electrically connected with the second grid electrode, a power signal is input to the second source electrode, the second drain electrode is electrically connected with the first organic light-emitting unit, the first drain electrode is also electrically connected with the first capacitor substrate, and the second capacitor substrate is grounded;
the second type of pixel driving circuit comprises a third thin film transistor, a fourth thin film transistor and a second storage capacitor, wherein the third thin film transistor comprises a third source electrode, a third grid electrode and a third drain electrode, the fourth thin film transistor comprises a fourth source electrode, a fourth grid electrode and a fourth drain electrode, and the second storage capacitor comprises a third capacitor substrate and a fourth capacitor substrate;
the third source electrode is electrically connected with the data line, the third gate electrode is electrically connected with the scanning line, the third drain electrode is electrically connected with the fourth gate electrode, a power signal is input to the fourth source electrode, the fourth drain electrode is electrically connected with the second type organic light-emitting unit, the fourth drain electrode is further electrically connected with the third capacitor substrate, and the fourth capacitor substrate is grounded.
3. The dual-sided display panel of claim 1, further comprising a planarization layer between the organic light emitting unit and the pixel driving circuit;
the planarization layer comprises a light-transmitting area and a light-shielding area, the vertical projection of the light-transmitting area on the substrate base plate and the vertical projection of the first type organic light-emitting unit on the substrate base plate are covered, the vertical projection of the light-shielding area on the substrate base plate covers the vertical projection of the second type organic light-emitting unit on the substrate base plate, and the portion, located in the light-shielding area, of the planarization layer is the second light-shielding layer.
4. The dual-sided display panel of claim 1, wherein the second light-shielding layer is located between the substrate and the pixel driving circuit.
5. The dual sided display panel of claim 1, further comprising a thin film encapsulation layer on a side of the organic light emitting unit away from the substrate base plate.
6. The dual-sided display panel of claim 5, wherein the first light-shielding layer is located between the first organic light-emitting unit and the thin film encapsulation layer, or the first light-shielding layer is located on a side of the thin film encapsulation layer away from the first organic light-emitting unit.
7. The dual sided display panel of claim 1, further comprising a buffer layer between the substrate base plate and the pixel drive circuit.
8. The dual-sided display panel of claim 1, wherein the first-type organic light emitting unit comprises a first electrode, a second electrode, and a first light emitting function layer between the first electrode and the second electrode; the second type organic light-emitting unit comprises a third electrode, a fourth electrode and a second light-emitting function layer positioned between the third electrode and the fourth electrode;
the first electrode, the second electrode, the third electrode and the fourth electrode are made of transparent conductive materials.
9. A display device comprising the double-sided display panel according to any one of claims 1 to 8.
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| CN110164322A (en) | 2019-05-22 | 2019-08-23 | 深圳市华星光电半导体显示技术有限公司 | A kind of display panel and electronic device |
| CN112542484A (en) * | 2019-09-20 | 2021-03-23 | 北京小米移动软件有限公司 | Display panel, display screen and electronic equipment |
| US11877482B2 (en) | 2019-10-29 | 2024-01-16 | Hefei Boe Joint Technology Co., Ltd. | Display substrate and method for manufacturing the same, driving method and display device |
| CN111489658B (en) * | 2020-04-23 | 2022-04-08 | 上海天马微电子有限公司 | Double-sided display panel, manufacturing method thereof and double-sided display device |
| CN111613652A (en) * | 2020-05-19 | 2020-09-01 | 深圳市华星光电半导体显示技术有限公司 | Display panel |
| KR20220003693A (en) * | 2020-07-01 | 2022-01-11 | 삼성디스플레이 주식회사 | Display apparatus and manufacturing the same |
| CN112233611B (en) * | 2020-10-22 | 2022-07-12 | Oppo广东移动通信有限公司 | Display module, preparation method and control method thereof and electronic equipment |
| CN112310142B (en) * | 2020-10-29 | 2022-08-26 | 厦门天马微电子有限公司 | Display device, display panel and manufacturing method thereof |
| CN113097371B (en) * | 2021-03-31 | 2022-08-12 | 厦门天马微电子有限公司 | Display panel, preparation method thereof and display device |
| CN113707698B (en) * | 2021-08-30 | 2024-10-18 | 京东方科技集团股份有限公司 | Transparent display panel and display device |
| CN113921575B (en) * | 2021-09-30 | 2022-08-05 | 惠科股份有限公司 | Double-sided luminous display screen and display device |
| CN114203749B (en) * | 2021-12-10 | 2023-08-01 | 深圳市华星光电半导体显示技术有限公司 | Double-sided display panel and double-sided display device |
| CN114170919A (en) * | 2021-12-13 | 2022-03-11 | Tcl华星光电技术有限公司 | Double-sided display panel and double-sided display splicing screen |
| CN114613752B (en) * | 2022-03-08 | 2024-07-19 | 厦门天马微电子有限公司 | Double-sided display panel and display device |
| WO2023221097A1 (en) * | 2022-05-20 | 2023-11-23 | 京东方科技集团股份有限公司 | Display substrate and manufacturing method therefor, and display device |
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| TWI478333B (en) * | 2012-01-30 | 2015-03-21 | Ind Tech Res Inst | Double-side light emitting display panel |
| CN104765157B (en) * | 2015-05-06 | 2017-12-08 | 京东方科技集团股份有限公司 | Display panel and its display methods, display device |
| CN105140260B (en) * | 2015-07-23 | 2018-04-17 | 京东方科技集团股份有限公司 | Organic LED array substrate and preparation method thereof, display device |
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