Display panel and electronic equipment

Abstract

The invention provides a display panel and electronic equipment. The display panel includes a light emitting unit, a light conversion layer, and a liquid crystal unit. The light-emitting unit comprises a first light-emitting surface and a second light-emitting surface which are opposite to each other, and the first light-emitting surface and the second light-emitting surface can emit first light. The light conversion layer is arranged on one side of the second light-emitting surface, and the light conversion layer can absorb the first light emitted by the second light-emitting surface and emit second light. The liquid crystal unit is arranged on the side, away from the second light-emitting face, of the light conversion layer and used for blocking the second light or emitting the second light out. The light conversion layer is used for absorbing the first light of the light emitting unit and emitting the second light to serve as backlight of the liquid crystal unit, so that the display panel achieves double-face display, the front display face and the back display face are used at the same time, the one-screen double-purpose effect is achieved, the structure is simple, the cost is low, the use scene can be further enriched, and the application prospect is wide. And the requirements of numerous special occasions are met.

Description

Technical Field

[0001] The present application belongs to the technical field of display panels, and specifically relates to display panels and electronic devices. Background Art

[0002] With the rapid development of society, display screens have gradually become mainstream equipment in many outdoor display places such as billboards and road signs, for example, airports, exhibition halls, multimedia conference rooms, multimedia teaching, movie cafes, KTV displays, smart homes, holographic images, fusion, interactive projection, splicing displays and other special occasions. However, most of the current display screens are single-sided displays with very single functions, which cannot meet the needs of many special occasions. Summary of the invention

[0003] In view of this, a first aspect of the present application provides a display panel, the display panel comprising:

[0004] A light-emitting unit, comprising a first light-emitting surface and a second light-emitting surface opposite to each other, wherein the first light-emitting surface and the second light-emitting surface are both capable of emitting a first light;

[0005] a light conversion layer, disposed on one side of the second light emitting surface, the light conversion layer being capable of absorbing the first light emitted from the second light emitting surface and emitting a second light;

[0006] The liquid crystal unit is arranged on a side of the light conversion layer away from the second light emitting surface, and the liquid crystal unit is used to block the second light or allow the second light to be emitted.

[0007] The display panel provided in the first aspect of the present application includes a light-emitting unit, a light conversion layer, and a liquid crystal unit. The first light-emitting surface of the light-emitting unit can emit a first light, so that the display panel has a first display surface. The first light emitted by the second light-emitting surface of the light-emitting unit is absorbed by the light conversion layer, and after absorbing the first light, the light conversion layer can convert it into a second light and emit it, which is used as the backlight of the liquid crystal unit. The liquid crystal unit can emit the second light, so that the display panel has a second display surface, so that the display panel can achieve double-sided display.

[0008] Therefore, the present application utilizes the light conversion layer to absorb the first light of the light-emitting unit and emits the second light as the backlight of the liquid crystal unit, thereby enabling the display panel to achieve double-sided display, and the front and back display surfaces are used at the same time to achieve the effect of one screen with dual uses. It not only has a simple structure and low cost, but also can further enrich its usage scenarios and meet the needs of many special occasions.

[0009] The display panel further comprises thin film transistors for controlling the liquid crystal unit, part of the thin film transistors are arranged between the light conversion layer and the liquid crystal unit, and another part of the thin film transistors are arranged between two light conversion layers and / or between two light emitting units.

[0010] The thin film transistor includes a gate layer and a common electrode layer, wherein the gate layer is arranged between the two light-emitting units, and the common electrode layer is arranged between the light conversion layer and the liquid crystal unit. The common electrode layer also extends to the side of the gate layer facing the liquid crystal unit and is electrically connected to the gate layer.

[0011] Among them, the thin film transistor also includes a switching layer and a pixel electrode layer, the switching layer is arranged between the two light-emitting units, the pixel electrode layer is arranged between the light conversion layer and the liquid crystal unit, and the pixel electrode layer also extends to the side of the switching layer facing the liquid crystal unit and is electrically connected to the switching layer.

[0012] Wherein, the thin film transistor satisfies at least one of the following conditions:

[0013] The gate layer is farther away from the liquid crystal unit than the switch layer;

[0014] Along the arrangement direction perpendicular to the light-emitting unit to the liquid crystal unit, the gate layer is arranged on the same layer as the hole transport layer of the light-emitting layer of the light-emitting unit;

[0015] Along the arrangement direction perpendicular to the light-emitting unit to the liquid crystal unit, the switch layer is arranged on the same layer as the light-transmitting cathode of the light-emitting unit;

[0016] The common electrode layer and the pixel electrode layer are arranged in the same layer along an arrangement direction perpendicular to the light emitting unit to the liquid crystal unit.

[0017] Among them, the light-emitting unit includes a light-transmitting anode, a light-emitting layer, and a light-transmitting cathode which are stacked in sequence along the arrangement direction from the light conversion layer to the liquid crystal unit, the light-transmitting anode and the light-transmitting cathode are staggered, the intersection of the light-transmitting anode and the light-transmitting cathode is a staggered area, and the light-emitting layer and the light-conversion layer both correspond to the staggered area; the thin film transistor also includes a common electrode layer and a pixel electrode layer arranged between the light conversion layer and the liquid crystal unit, and the common electrode layer and the pixel electrode layer both correspond to the staggered area; the liquid crystal layer of the liquid crystal unit corresponds to the staggered area.

[0018] The thin film transistor further comprises a gate layer and a switch layer arranged between the two light emitting units. In the arrangement direction perpendicular to the light emitting units to the light conversion layer, the gate layer is arranged between the two light-transmitting anodes, and the switch layer is arranged between the two light-transmitting cathodes.

[0019] Among them, the common electrode layer includes a first part and a plurality of second parts arranged on the side of the first part facing the pixel electrode layer, the pixel electrode layer includes a third part and a plurality of fourth parts arranged on the side of the third part facing the common electrode layer, at least one of the second parts is inserted between two adjacent fourth parts, and at least one of the fourth parts is inserted between two adjacent second parts.

[0020] The display panel further includes a first color filter layer and a second color filter layer. The first color filter layer is arranged on a side of the light emitting unit away from the liquid crystal unit, and the second color filter layer is arranged between the light conversion layer and the liquid crystal unit.

[0021] A second aspect of the present application provides an electronic device, which includes a housing and a display panel as provided in the first aspect of the present application, wherein the display panel is mounted on the housing.

[0022] The electronic device provided in the second aspect of the present application adopts the display panel provided in the first aspect of the present application. By utilizing the light conversion layer to absorb the first light of the light-emitting unit and emit the second light as the backlight of the liquid crystal unit, the display panel can achieve double-sided display. Moreover, the front and back display surfaces are used at the same time to achieve the effect of one screen with dual uses. It not only has a simple structure and low cost, but also can further enrich its usage scenarios to meet the needs of many special occasions. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the implementation modes of the present application, the drawings required for use in the implementation modes of the present application will be described below.

[0024] Figure 1 A schematic diagram of the structure of a display panel provided in one embodiment of the present application Figure 1 .

[0025] Figure 2 A schematic diagram of the structure of a display panel provided in one embodiment of the present application Figure 2 .

[0026] Figure 3 A schematic diagram of the structure of a display panel provided in one embodiment of the present application Figure 3 .

[0027] Figure 4 A schematic diagram of the structure of a display panel provided in one embodiment of the present application Figure 4 .

[0028] Figure 5 A schematic diagram of the structure of a display panel provided in one embodiment of the present application Figure 5 .

[0029] Description of reference numerals: display panel 1, light-emitting unit 11, first light-emitting surface 11a, second light-emitting surface 11b, light-transmitting anode 111, light-emitting layer 112, hole injection layer 1121, hole transport layer 1122, intermediate light-emitting layer 1123, electron transport layer 1124, electron injection layer 1125, light-transmitting cathode 113, light conversion layer 12, liquid crystal unit 13, first polarizer 131, first alignment layer 132, liquid crystal layer 133, second alignment layer 134, flat layer 135, light shielding layer 136, static Electrically conductive layer-137, second polarizer-138, supporting column-139, first light-transmitting substrate-14, second light-transmitting substrate-15, thin film transistor-16, common electrode layer-161, first part-1611, second part-1612, gate layer-162, pixel electrode layer-163, third part-1631, fourth part-1632, switching layer-164, active layer-1641, source layer-1642, drain layer-1643, insulating layer-17, interlaced region-18, first color filter layer-191, second color filter layer-192. DETAILED DESCRIPTION

[0030] The following are preferred implementations of the present application. It should be noted that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application, and these improvements and modifications are also considered to be within the scope of protection of the present application.

[0031] In the related art, dual screens are often installed, that is, two display panels are installed to realize front and back double-sided display, or a transparent screen with double-sided display is used, which cannot achieve the effect of dual use of one screen.

[0032] Please refer to Figure 1-Figure 4 , Figure 1 A schematic diagram of the structure of a display panel provided in one embodiment of the present application Figure 1 . Figure 2 A schematic diagram of the structure of a display panel provided in one embodiment of the present application Figure 2 . Figure 3 A schematic diagram of the structure of a display panel provided in one embodiment of the present application Figure 3 . Figure 4 A schematic diagram of the structure of a display panel provided in one embodiment of the present application Figure 4 .

[0033] This embodiment provides a display panel 1, which includes a light emitting unit 11, a light conversion layer 12, and a liquid crystal unit 13. The light emitting unit 11 includes a first light emitting surface 11a and a second light emitting surface 11b opposite to each other, and the first light emitting surface 11a and the second light emitting surface 11b can both emit a first light (such as Figure 1 The light conversion layer 12 is disposed on one side of the second light emitting surface 11b, and the light conversion layer 12 can absorb the first light emitted from the second light emitting surface 11b and emit a second light (as shown in FIG. Figure 1 The liquid crystal unit 13 is disposed on a side of the light conversion layer 12 away from the second light emitting surface 11b, and the liquid crystal unit 13 is used to block the second light or allow the second light to be emitted.

[0034] In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application and the above drawings are used to distinguish different objects rather than to describe a specific order.

[0035] The display panel 1 provided in this embodiment includes a light emitting unit 11 for emitting a first light. The number of the light emitting unit 11 is at least one. Figure 4 As shown, each light emitting unit 11 includes a light emitting layer 12 arranged along the direction from the light conversion layer 12 to the liquid crystal unit 13 (eg Figure 4 A transparent anode 111, a light-emitting layer 112, and a light-transmitting cathode 113 are sequentially stacked on the light conversion layer 12 (as shown in the middle direction D1). Each light-emitting layer 112 includes a hole injection layer 1121, a hole transport layer 1122, an intermediate light-emitting layer 1123, an electron transport layer 1124, and an electron injection layer 1125, which are sequentially stacked along the arrangement direction from the light conversion layer 12 to the liquid crystal unit 13. The transparent cathode 113 and the transparent anode 111 can transmit light. The first light-emitting surface 11a of the light-emitting unit 11 is the surface of the transparent anode 111 away from the light-emitting layer 112. The second light-emitting surface 11b of the light-emitting unit 11 is the surface of the transparent cathode 113 away from the light-emitting layer 112. Optionally, the display panel 1 also includes a first transparent substrate 14 disposed on the side of the light-emitting unit 11 away from the light conversion layer 12, and a second transparent substrate 15 disposed on the side of the liquid crystal unit 13 away from the light conversion layer 12. The first light-transmitting substrate 14 and the second light-transmitting substrate 15 can be used as substrates for coating, or components for protecting the display panel 1. The first light-transmitting substrate 14 and the second light-transmitting substrate 15 can be made of glass.

[0036] The display panel 1 provided in this embodiment also includes a light conversion layer 12, which is used to absorb the first light from the light-emitting unit 11 and emit the second light. The number of light conversion layers 12 is at least one. The material of the light conversion layer 12 includes a long afterglow luminescent material. The light conversion layer 12 can emit visible light under the excitation of an external light source, and store part of the obtained light energy, and slowly release the energy in the form of light after the excitation of the external light source stops. The light conversion layer 12 is arranged on the side of the light-transmitting cathode 113 away from the light-emitting layer 112. The light conversion layer 12 is insulated from the light-emitting unit 11. Optionally, the light conversion layer 12 corresponds to the light-emitting layer 112 and the liquid crystal layer 133.

[0037] The display panel 1 provided in this embodiment further includes a liquid crystal unit 13, which is used to emit the second light or block the second light. Figure 4 As shown, the liquid crystal unit 13 includes a first polarizer 131, a first alignment layer 132, a liquid crystal layer 133 having a plurality of liquid crystals, a second alignment layer 134, a flat layer 135, a light shielding layer 136, an electrostatic guiding layer 137, and a second polarizer 138, which are sequentially stacked along the arrangement direction from the light emitting unit 11 to the light conversion layer 12. The light shielding layer 136 is located between the two liquid crystal layers 133. The liquid crystal unit 13 also includes a support column 139 located between the two liquid crystal units 13, and the support column 139 is located between the second alignment layer 134 and the flat layer 135.

[0038] The display panel 1 provided in this embodiment further includes a thin film transistor 16 for controlling the deflection of a plurality of liquid crystals of the liquid crystal unit 13. Optionally, the thin film transistor 16 is located between the light conversion layer 12 and the liquid crystal unit 13. Optionally, part of the thin film transistor 16 is disposed between the light conversion layer 12 and the liquid crystal unit 13, and another part of the thin film transistor 16 is disposed between two light conversion layers 12. Optionally, part of the thin film transistor 16 is disposed between the light conversion layer 12 and the liquid crystal unit 13, and another part of the thin film transistor 16 is disposed between two light conversion layers 12 and between two light emitting units 11.

[0039] like Figure 4As shown, the thin film transistor 16 includes a common electrode layer 161, a gate layer 162 electrically connected to the common electrode, a pixel electrode layer 163, and a switch layer 164 electrically connected to the pixel electrode layer 163. Optionally, the common electrode layer 161, the gate layer 162, the pixel electrode layer 163, and the switch layer 164 can allow light to pass through. Optionally, the common electrode layer 161, the gate layer 162, the pixel electrode layer 163, and the switch layer 164 are arranged in the same layer along a direction perpendicular to the arrangement direction of the light conversion layer 12 and the light emitting unit 11. Optionally, the common electrode layer 161, the gate layer 162, the pixel electrode layer 163, and the switch layer 164 are stacked along the direction of the arrangement direction of the light conversion layer 12 and the light emitting unit 11. Optionally, along the direction of the arrangement direction of the light conversion layer 12 and the light emitting unit 11, at least two of the common electrode layer 161, the gate layer 162, the pixel electrode layer 163, and the switch layer 164 are stacked. Optionally, along the arrangement direction perpendicular to the light conversion layer 12 and the light emitting unit 11, at least two of the common electrode layer 161, the gate layer 162, the pixel electrode layer 163, and the switch layer 164 are arranged in the same layer. Optionally, at least two of the common electrode layer 161, the gate layer 162, the pixel electrode layer 163, and the switch layer 164 are arranged alternately. Optionally, at least two of the common electrode layer 161, the gate layer 162, the pixel electrode layer 163, and the switch layer 164 are arranged in direct correspondence.

[0040] The common electrode layer 161 and the pixel electrode layer 163 are both used to generate an electric field to control the deflection of multiple liquid crystals in the liquid crystal unit 13. Optionally, the common electrode layer 161 and the pixel electrode layer 163 are arranged adjacent to each other. For example, the common electrode layer 161 and the pixel electrode layer 163 are arranged in the same layer along a direction perpendicular to the arrangement direction of the light conversion layer 12 and the light emitting unit 11. For another example, the common electrode layer 161 and the pixel electrode layer 163 are arranged in sequence along the arrangement direction of the light conversion layer 12 and the light emitting unit 11. For another example, the pixel electrode layer 163 and the common electrode layer 161 are arranged in sequence along the arrangement direction of the light conversion layer 12 and the light emitting unit 11. For another example, the common electrode layer 161 and the pixel electrode layer 163 are arranged in an alternating manner. For another example, the common electrode layer 161 corresponds to the pixel electrode layer 163.

[0041] The gate layer 162 is used to control the common electrode layer 161. The switch layer 164 is used to control the pixel electrode layer 163. The switch layer 164 includes an active layer 1641, a source layer 1642 electrically connected to the active layer 1641, and a drain layer 1643 electrically connected to the active layer 1641, and the source layer 1642 and the drain layer 1643 are arranged alternately. The pixel electrode layer 163 is electrically connected to the source layer 1642 or the drain layer 1643. Optionally, the source layer 1642 and the drain layer 1643 are both arranged on the side of the active layer 1641 facing the liquid crystal unit 13. For example, the gate layer 162 and the switch layer 164 are arranged in the same layer along a direction perpendicular to the arrangement direction of the light conversion layer 12 and the light emitting unit 11. For another example, the gate layer 162 and the switch layer 164 are arranged in sequence along the arrangement direction of the light conversion layer 12 and the light emitting unit 11. For another example, the switch layer 164 and the gate layer 162 are sequentially stacked along the arrangement direction of the light conversion layer 12 and the light emitting unit 11. For another example, the gate layer 162 and the switch layer 164 are alternately arranged. For another example, the gate layer 162 corresponds to the switch layer 164.

[0042] Specifically, the first light emitting surface 11a of the light emitting unit 11 can emit a first light, so that the display panel 1 has a first display surface. The first light emitted by the second light emitting surface 11b of the light emitting unit 11 is absorbed by the light conversion layer 12, and after absorbing the first light, the light conversion layer 12 can convert it into a second light and emit it, which is used as the backlight of the liquid crystal unit 13. The liquid crystal unit 13 can emit the second light, so that the display panel 1 has a second display surface, so that the display panel 1 can achieve double-sided display.

[0043] Therefore, this embodiment uses the light conversion layer 12 to absorb the first light of the light emitting unit 11 and emit the second light as the backlight of the liquid crystal unit 13, so that the display panel 1 can achieve double-sided display, and the front and back display surfaces are used at the same time, and the two screens are displayed independently, achieving the effect of one screen with two uses. It is not only simple in structure, easy to implement, clear in display, and low in cost, but also can further enrich its use scenarios and meet the needs of many special occasions. In addition, the display panel 1 provided in this embodiment can also achieve double-screen double-sided display, with the same image quality on the front and back, and can be used at the same time, achieving the effect of one screen with two uses.

[0044] For example, when the upper display panel 1 is required to display, the thin film transistor 16 controls the electrical signal to deflect the liquid crystal, the light source is provided by the light conversion layer 12, the light is displayed through the upper color filter layer, the light is left in the X direction through the first polarizer 131, the light is deflected to the Y direction through the liquid crystal, and the light is left in the Y direction through the second polarizer 138 to be emitted, thereby achieving the panel display effect.

[0045] For another example, when the lower display panel 1 is required to display, the light emitting unit 11 emits light upward and downward relative to the OLED light emitting structure. The light emitted downward passes through the lower color filter layer to display the picture, forming an OLED display structure; the light emitted upward is absorbed by the light conversion layer 12 and serves as the backlight for the upper LCD liquid crystal unit 13.

[0046] The display panel 1 provided in this embodiment can display on both sides, and has a stronger ability to adapt to the environment. Whether in places with large public flow such as airports, exhibition halls, or event sites, this double-sided display panel 1 can provide users with more intuitive information. The operation is simple and the information switching is fast. The double-sided display panel 1 can be applied to multimedia conference rooms, multimedia teaching, movie cafes, KTV displays, smart homes, holographic images, fusion, interactive projection, splicing displays and other multimedia systems in terms of space and time utilization, fully meeting customer needs.

[0047] Furthermore, the double-sided flat display panel 1 has a light and thin body, which can save more space for users and provide users with a double-sided media playback experience.

[0048] Please refer to Figure 3-Figure 4 In one embodiment, the display panel 1 also includes a thin film transistor 16 for controlling the liquid crystal unit 13, part of the thin film transistor 16 is arranged between the light conversion layer 12 and the liquid crystal unit 13, and another part of the thin film transistor 16 is arranged between two of the light conversion layers 12 and / or between two of the light emitting units 11.

[0049] For example, at least any one of the common electrode layer 161 , the gate layer 162 , the pixel electrode layer 163 , and the switch layer 164 is disposed between the light conversion layer 12 and the liquid crystal unit 13 , and the rest are disposed between two light conversion layers 12 and / or between two light emitting units 11 .

[0050] This embodiment limits the position of the thin film transistor 16 component so that part of the thin film transistor 16 structure is arranged between two light conversion layers 12 and / or between two light-emitting units 11. On the basis of realizing double-sided display, the thickness of the display panel 1 is reduced, the space utilization is improved, and more space is saved for users.

[0051] Please refer to Figure 3-Figure 4 In one embodiment, the thin film transistor 16 includes a gate layer 162 and a common electrode layer 161, the gate layer 162 is arranged between the two light-emitting units 11, the common electrode layer 161 is arranged between the light conversion layer 12 and the liquid crystal unit 13, and the common electrode layer 161 also extends to the side of the gate layer 162 facing the liquid crystal unit 13 and is electrically connected to the gate layer 162.

[0052] In this embodiment, the gate layer 162 is disposed between the two light-emitting units 11, and part of the common electrode layer 161 is also located between the two light conversion layers 12 and between the two light-emitting units 11. On the basis of realizing double-sided display, the thickness of the display panel 1 is reduced, the space utilization is improved, and more space is saved for users.

[0053] Among them, the common electrode is closer to the liquid crystal unit 13 than the gate layer 162. On the one hand, the common electrode layer 161 is used to generate an electric field to control the liquid crystal unit 13. Setting the common electrode layer 161 closer to the liquid crystal unit 13 can make it easier for the thin film transistor 16 to control the liquid crystal unit 13, thereby improving the reliability of the display panel 1. On the other hand, arranging the gate layer 162 between the two light-emitting units 11 can prevent the gate layer 162 from blocking the second light, reduce the loss of the second light, and improve the display effect of the display panel 1. In addition, since the common electrode layer 161 needs to be connected to the gate layer 162, arranging the gate layer 162 between the two light-emitting units 11 so that a portion of the common electrode layer 161 is also extended between the two light conversion layers 12 and between the two light-emitting units 11 can further reduce the loss of the second light by the common electrode layer 161, thereby improving the display effect of the display panel 1.

[0054] Optionally, an insulating layer 17 is disposed between the two light emitting units 11 and between the two light conversion layers 12, and the insulating layer 17 covers the gate layer 162. The insulating layer 17 is provided with a first through hole and exposes the gate layer 162, and the common electrode is also located in the first through hole and electrically connected to the gate layer 162.

[0055] Please refer to Figure 3-Figure 4 In one embodiment, the thin film transistor 16 further includes a switch layer 164 and a pixel electrode layer 163, the switch layer 164 is disposed between the two light-emitting units 11, the pixel electrode layer 163 is disposed between the light conversion layer 12 and the liquid crystal unit 13, and the pixel electrode layer 163 also extends to a side of the switch layer 164 facing the liquid crystal unit 13 and is electrically connected to the switch layer 164.

[0056] In this embodiment, the switch layer 164 is disposed between two light-emitting units 11, and part of the pixel electrode layer 163 is also located between two light conversion layers 12. On the basis of realizing double-sided display, the thickness of the display panel 1 is reduced, the space utilization is improved, and more space is saved for users.

[0057] Among them, the pixel electrode is closer to the liquid crystal unit 13 than the switch layer 164. On the one hand, the pixel electrode layer 163 is used to generate an electric field to control the liquid crystal unit 13. Setting the pixel electrode layer 163 closer to the liquid crystal unit 13 can make it easier for the thin film transistor 16 to control the liquid crystal unit 13, thereby improving the reliability of the display panel 1. On the other hand, arranging the switch layer 164 between the two light-emitting units 11 can prevent the switch layer 164 from blocking the second light, reduce the loss of the second light, and improve the display effect of the display panel 1. In addition, since the pixel electrode layer 163 needs to be connected to the switch layer 164, arranging the switch layer 164 between the two light-emitting units 11 so that a portion of the pixel electrode layer 163 is also extended and located between the two light conversion layers 12 can further reduce the loss of the second light by the pixel electrode layer 163 and improve the display effect of the display panel 1.

[0058] Optionally, an insulating layer 17 is disposed between the two light emitting units 11 and between the two light conversion layers 12, and the insulating layer 17 covers the switch layer 164. The insulating layer 17 is provided with a second through hole and exposes the switch layer 164, and the pixel electrode is also located in the second through hole and electrically connected to the switch layer 164.

[0059] Please refer to Figure 3-Figure 4 In one embodiment, the thin film transistor 16 satisfies at least one of the following conditions: the gate layer 162 is farther away from the liquid crystal unit 13 than the switch layer 164. And / or, along the arrangement direction perpendicular to the light emitting unit 11 to the liquid crystal unit 13 (such as Figure 4 In the direction D2, the gate layer 162 is arranged in the same layer as the hole transport layer 1122 of the light-emitting layer 112 of the light-emitting unit 11. And / or, along the arrangement direction perpendicular to the light-emitting unit 11 to the liquid crystal unit 13, the switch layer 164 is arranged in the same layer as the light-transmitting cathode 113 layer of the light-emitting unit 11. And / or, along the arrangement direction perpendicular to the light-emitting unit 11 to the liquid crystal unit 13, the common electrode layer 161 is arranged in the same layer as the pixel electrode layer 163.

[0060] The gate layer 162 is farther from the liquid crystal unit 13 than the switch layer 164. Specifically, during the preparation process, a film is deposited on the first light-transmitting substrate 14 along the arrangement direction from the light-emitting unit 11 to the liquid crystal unit 13. The switch layer 164 needs to be prepared with an active layer 1641, a source layer 1642, and a drain layer 1643, and subsequently a hole needs to be punched in the insulating layer 17 to expose the source layer 1642 or the drain layer 1643 of the switch layer 164, while the gate layer 162 has only one layer during preparation. Therefore, making the switch layer 164 with a relatively large number of layers closer to the liquid crystal unit 13 can shorten the depth of the through hole exposing the switch layer 164, which is conducive to determining the accuracy of the punching of the switch layer 164 and reducing the difficulty of preparation.

[0061] Along the arrangement direction perpendicular to the light-emitting unit 11 to the liquid crystal unit 13, the gate layer 162 is arranged in the same layer as the hole transport layer 1122 of the light-emitting layer 112 of the light-emitting unit 11. Specifically, during the preparation process, the light-transmitting anode 111 of the light-emitting unit 11 is connected to the hole injection layer 1121 of the plurality of light-emitting layers 112. An insulating layer 17 is arranged between the two light-emitting layers 112, and the insulating layer 17 also covers the light-transmitting anode 111 between the two light-emitting layers 112. By arranging the gate layer 162 and the hole transport layer 1122 of the light-emitting layer 112 in the same layer, the hole injection layer 1121 of the light-emitting layer 112 can be arranged in the same layer as the insulating layer 17. It can also be understood that it can be ensured that the insulating layer 17 is arranged between the gate layer 162 and the light-transmitting anode 111 to play a positioning role, thereby avoiding mutual interference between the gate layer 162 and the light-transmitting anode 111, and avoiding mutual interference between the thin film transistor 16 and the light-transmitting anode 111, so as to improve the reliability of the display panel 1.

[0062] In the arrangement direction perpendicular to the light emitting unit 11 to the liquid crystal unit 13, the switch layer 164 is arranged in the same layer as the light-transmitting cathode 113 of the light emitting unit 11. Optionally, in the arrangement direction perpendicular to the light emitting unit 11 to the liquid crystal unit 13, the active layer 1641 is arranged in the same layer as the light-transmitting cathode 113 of the light emitting unit 11. An insulating layer 17 is provided between the switch layer 164 and the light-transmitting cathode 113. Specifically, in the preparation process, arranging the switch layer 164 and the light-transmitting cathode 113 in the same layer is conducive to determining the position of the switch layer 164 in the preparation process, thereby avoiding mutual interference between the switch layer 164 and the light-transmitting cathode 113, and avoiding mutual interference between the thin film transistor 16 and the light-transmitting anode 111, so as to improve the reliability of the display panel 1.

[0063] The common electrode layer 161 and the pixel electrode layer 163 are arranged in the same layer along the arrangement direction perpendicular to the light emitting unit 11 to the liquid crystal unit 13. The common electrode layer 161 and the pixel electrode layer 163 are both used to generate an electric field. The electric field generated by the common electrode layer 161 can interact with the electric field generated by the pixel electrode layer 163. The common electrode layer 161 and the pixel electrode layer 163 are arranged in the same layer, which can shorten the distance between the common electrode layer 161 and the pixel electrode layer 163, enhance the electric field of the interaction between the common electrode layer 161 and the pixel electrode layer 163, and thus improve the working performance of the thin film transistor 16 controlling the liquid crystal unit 13.

[0064] Please refer to Figure 4-Figure 5 , Figure 5 A schematic diagram of the structure of a display panel provided in one embodiment of the present application Figure 5 In one embodiment, the light emitting unit 11 includes a light emitting unit 11 along the arrangement direction of the light conversion layer 12 to the liquid crystal unit 13 (eg Figure 4A light-transmitting anode 111, a light-emitting layer 112, and a light-transmitting cathode 113 are sequentially stacked on the top surface (as shown in the middle direction D2), the light-transmitting anode 111 and the light-transmitting cathode 113 are staggered, the staggered portion of the light-transmitting anode 111 and the light-transmitting cathode 113 is a staggered region 18, the light-emitting layer 112 and the light-conversion layer 12 both correspond to the staggered region 18; the thin film transistor 16 also includes a common electrode layer 161 and a pixel electrode layer 163 arranged between the light-conversion layer 12 and the liquid crystal unit 13, the common electrode layer 161 and the pixel electrode layer 163 both correspond to the staggered region 18; the liquid crystal layer 133 of the liquid crystal unit 13 corresponds to the staggered region 18.

[0065] In the arrangement direction perpendicular to the light conversion layer 12 to the liquid crystal unit 13, the light-transmitting anode 111 and the light-transmitting cathode 113 are arranged alternately. Optionally, the extending direction of the light-transmitting anode 111 is a first direction, and the extending direction of the light-transmitting cathode 113 is a second direction perpendicular to the first direction. The intersection of the light-transmitting anode 111 and the light-transmitting cathode 113 can also be understood as the light-transmitting anode 111 in the orthogonal projection area of ​​the light-transmitting cathode 113, or the light-transmitting cathode 113 in the orthogonal projection area of ​​the light-transmitting anode 111.

[0066] The light-emitting layer 112 directly corresponds to the interlaced region 18. In other words, the light-emitting layer 112 and the light-transmitting anode 111 overlap in their orthographic projection on the light-transmitting cathode 113, or the light-emitting layer 112 and the light-transmitting cathode 113 overlap in their orthographic projection on the light-transmitting anode 111. The light-conversion layer 12 directly corresponds to the interlaced region 18. In other words, the light-conversion layer 12 and the light-transmitting anode 111 overlap in their orthographic projection on the light-transmitting cathode 113, or the light-conversion layer 12 and the light-transmitting cathode 113 overlap in their orthographic projection on the light-transmitting anode 111.

[0067] The common electrode layer 161 directly corresponds to the interlaced area 18. In other words, the common electrode layer 161 coincides with the orthographic projection of the light-transmitting anode 111 on the light-transmitting cathode 113, or the common electrode layer 161 coincides with the orthographic projection of the light-transmitting cathode 113 on the light-transmitting anode 111. The pixel electrode layer 163 directly corresponds to the interlaced area 18. In other words, the pixel electrode layer 163 coincides with the orthographic projection of the light-transmitting anode 111 on the light-transmitting cathode 113, or the pixel electrode layer 163 coincides with the orthographic projection of the light-transmitting cathode 113 on the light-transmitting anode 111. The liquid crystal layer 133 of the liquid crystal unit 13 directly corresponds to the interlaced area 18. In other words, the liquid crystal layer 133 coincides with the orthographic projection of the light-transmitting anode 111 on the light-transmitting cathode 113, or the liquid crystal layer 133 coincides with the orthographic projection of the light-transmitting cathode 113 on the light-transmitting anode 111.

[0068] In this embodiment, by limiting the positions of the light-transmitting anode 111, the light-emitting layer 112, the light-transmitting cathode 113, the light-converting layer 12, the common electrode layer 161, the pixel electrode layer 163, and the liquid crystal layer 133, the light-emitting layer 112, the light-converting layer 12, the common electrode layer 161, the pixel electrode layer 163, and the liquid crystal layer 133 are arranged in correspondence. On the one hand, the distance from the first light from the light-emitting unit 11 to the light-converting layer 12 is shortened, and the consumption of the first light is reduced, thereby improving the display effect of the display panel 1. On the other hand, the distance from the second light from the light-converting layer 12 to the liquid crystal layer 133 is shortened, and the consumption of the first light is reduced, further improving the display effect of the display panel 1. In addition, the distance between the common electrode layer 161 and the liquid crystal layer 133 is shortened, and the distance between the pixel electrode layer 163 and the liquid crystal layer 133 is shortened, thereby improving the working performance of the thin film transistor 16 controlling the liquid crystal unit 13.

[0069] Please refer to Figure 4-Figure 5 In one embodiment, the thin film transistor 16 also includes a gate layer 162 and a switch layer 164 disposed between the two light-emitting units 11. Along the arrangement direction perpendicular to the light-emitting unit 11 to the light conversion layer 12, the gate layer 162 is disposed between the two light-transmitting anodes 111, and the switch layer 164 is disposed between the two light-transmitting cathodes 113.

[0070] The gate layer 162 and the switch layer 164 are arranged in an interlaced manner in a direction perpendicular to the arrangement direction of the light conversion layer 12 to the liquid crystal unit 13. Optionally, the extension direction of the gate layer 162 is a first direction, and the extension direction of the switch layer 164 is a second direction perpendicular to the first direction. In this embodiment, by limiting the positions of the gate layer 162 and the switch layer 164, it is possible to avoid the switch layer 164 and the switch layer 164 blocking the first light and the second light, reduce the loss of the first light and the second light, and improve the display effect of the display panel 1.

[0071] In addition, since the structure of each layer needs to be formed by multiple coatings during preparation, it is relatively complicated. This arrangement is beneficial to reduce the mutual interference between the light-transmitting anode 111, the light-transmitting cathode 113, the gate layer 162, and the switch layer 164 during preparation, thereby reducing the difficulty of preparation.

[0072] Please refer to Figure 5In one embodiment, the common electrode layer 161 includes a first part 1611 and a plurality of second parts 1612 arranged on the side of the first part 1611 facing the pixel electrode layer 163, the pixel electrode layer 163 includes a third part 1631 and a plurality of fourth parts 1632 arranged on the side of the third part 1631 facing the common electrode layer 161, at least one of the second parts 1612 is inserted between two adjacent fourth parts 1632, and at least one of the fourth parts 1632 is inserted between two adjacent second parts 1612.

[0073] Optionally, the common electrode layer 161 and the pixel electrode layer 163 are arranged in the same layer along a direction perpendicular to the arrangement direction of the light-emitting unit 11 to the light conversion layer 12. Optionally, the extension directions of the first portion 1611 and the third portion 1631 are parallel to each other. The extension direction of the second portion 1612 is perpendicular to the extension direction of the first portion 1611. The extension direction of the fourth portion 1632 is perpendicular to the extension direction of the third portion 1631. It can also be understood that the shapes of the common electrode layer 161 and the pixel electrode layer 163 are similar to a fork, the second portion 1612 of the common electrode layer 161 is inserted between the pixel electrode layers 163, and the fourth portion 1632 of the pixel electrode layer 163 is inserted between the common electrode layers 161.

[0074] In this embodiment, by inserting part of the common electrode layer 161 into the pixel electrode layer 163 and part of the pixel electrode layer 163 into the common electrode layer 161, the distance between the common electrode layer 161 and the pixel electrode layer 163 can be further shortened, and the electric field of the interaction between the common electrode layer 161 and the pixel electrode layer 163 can be further enhanced, thereby further improving the working performance of the thin film transistor 16 in controlling the liquid crystal unit 13.

[0075] Please refer to Figure 4 In one embodiment, the display panel 1 further includes a first color filter layer 191 and a second color filter layer 192, wherein the first color filter layer 191 is disposed on a side of the light-emitting unit 11 away from the liquid crystal unit 13, and the second color filter layer 192 is disposed between the light conversion layer 12 and the liquid crystal unit 13.

[0076] The first color filter layer 191 is located between the first light-transmitting substrate 14 and the light-transmitting cathode 113. The second color filter layer 192 is located between the thin film transistor 16 and the light conversion layer 12. Optionally, part of the thin film transistor 16 passes through the second color filter layer 192. The colors of the first color filter layer 191 and the second color filter layer 192 are the same or different. When the colors of the first color filter layer 191 and the second color filter layer 192 are the same, the front and back display surfaces of the display panel 1 can display the same color. When the colors of the first color filter layer 191 and the second color filter layer 192 are different, the front and back display surfaces of the display panel 1 can display different colors. Such a setting is not only simple in structure and low in cost, but also can further enrich its use scenarios and meet the needs of many special occasions.

[0077] This embodiment utilizes the OLED display principle, adds a light conversion layer 12, and improves the coating structure process to achieve different display effects on the front and back sides based on the original single-sided display. It can achieve dual-screen double-sided display, with the same picture quality on both sides, and can be used simultaneously to achieve the effect of one screen with dual uses. It not only has a simple structure but also low cost, which can further enrich its usage scenarios.

[0078] The present application also provides an electronic device, which includes a housing and a display panel as provided above in the present application, wherein the display panel is mounted on the housing.

[0079] The electronic device provided in this embodiment adopts the display panel provided in the above application. By utilizing the light conversion layer to absorb the first light of the light-emitting unit and emit the second light as the backlight of the liquid crystal unit, the display panel can achieve double-sided display. In addition, the front and back display surfaces are used at the same time to achieve the effect of one screen with dual uses. It not only has a simple structure and low cost, but also can further enrich its usage scenarios to meet the needs of many special occasions.

[0080] The above is a detailed introduction to the contents provided in the implementation mode of the present application. This article explains and illustrates the principles and implementation modes of the present application. The above explanation is only used to help understand the method and core idea of ​​the present application. At the same time, for those skilled in the art, according to the idea of ​​the present application, there will be changes in the specific implementation mode and application scope. In summary, the contents of this specification should not be understood as limiting the present application.

Claims

1. A display panel, characterized in that: The display panel comprises: A light-emitting unit, comprising a first light-emitting surface and a second light-emitting surface opposite to each other, wherein the first light-emitting surface and the second light-emitting surface are both capable of emitting a first light; a light conversion layer, disposed on one side of the second light emitting surface, the light conversion layer being capable of absorbing the first light emitted from the second light emitting surface and emitting a second light; The liquid crystal unit is arranged on a side of the light conversion layer away from the second light emitting surface, and the liquid crystal unit is used to block the second light or allow the second light to be emitted.

2. The display panel according to claim 1, wherein: The display panel further includes a thin film transistor for controlling the liquid crystal unit, part of the thin film transistor is arranged between the light conversion layer and the liquid crystal unit, and another part of the thin film transistor is arranged between two light conversion layers and / or between two light emitting units.

3. The display panel according to claim 2, wherein: The thin film transistor includes a gate layer and a common electrode layer, wherein the gate layer is arranged between the two light-emitting units, the common electrode layer is arranged between the light conversion layer and the liquid crystal unit, and the common electrode layer further extends to a side of the gate layer facing the liquid crystal unit and is electrically connected to the gate layer.

4. The display panel according to claim 3, wherein: The thin film transistor also includes a switch layer and a pixel electrode layer. The switch layer is arranged between the two light-emitting units, and the pixel electrode layer is arranged between the light conversion layer and the liquid crystal unit. The pixel electrode layer also extends to the side of the switch layer facing the liquid crystal unit and is electrically connected to the switch layer.

5. The display panel according to claim 4, wherein: The thin film transistor satisfies at least one of the following conditions: The gate layer is farther away from the liquid crystal unit than the switch layer; Along the arrangement direction perpendicular to the light-emitting unit to the liquid crystal unit, the gate layer is arranged on the same layer as the hole transport layer of the light-emitting layer of the light-emitting unit; Along the arrangement direction perpendicular to the light-emitting unit to the liquid crystal unit, the switch layer is arranged on the same layer as the light-transmitting cathode of the light-emitting unit; The common electrode layer and the pixel electrode layer are arranged in the same layer along an arrangement direction perpendicular to the light emitting unit to the liquid crystal unit.

6. The display panel according to claim 2, wherein: The light-emitting unit includes a light-transmitting anode, a light-emitting layer, and a light-transmitting cathode which are sequentially stacked along the arrangement direction from the light-conversion layer to the liquid crystal unit. The light-transmitting anode and the light-transmitting cathode are staggered, and the staggered portion between the light-transmitting anode and the light-transmitting cathode is a staggered area. The light-emitting layer and the light-conversion layer both correspond to the staggered area. The thin-film transistor also includes a common electrode layer and a pixel electrode layer arranged between the light-conversion layer and the liquid crystal unit. The common electrode layer and the pixel electrode layer both correspond to the staggered area. The liquid crystal layer of the liquid crystal unit corresponds to the staggered area.

7. The display panel according to claim 6, wherein: The thin film transistor also includes a gate layer and a switch layer arranged between the two light-emitting units. Along the arrangement direction perpendicular to the light-emitting units to the light conversion layer, the gate layer is arranged between the two light-transmitting anodes, and the switch layer is arranged between the two light-transmitting cathodes.

8. The display panel according to claim 6, wherein: The common electrode layer includes a first part and a plurality of second parts arranged on the side of the first part facing the pixel electrode layer, the pixel electrode layer includes a third part and a plurality of fourth parts arranged on the side of the third part facing the common electrode layer, at least one of the second parts is inserted between two adjacent fourth parts, and at least one of the fourth parts is inserted between two adjacent second parts.

9. The display panel according to any one of claims 1 to 8, characterized in that: The display panel further includes a first color filter layer and a second color filter layer. The first color filter layer is arranged on a side of the light emitting unit away from the liquid crystal unit, and the second color filter layer is arranged between the light conversion layer and the liquid crystal unit.

10. An electronic device, characterized in that: The electronic device comprises a housing and a display panel as described in any one of claims 1 to 9, wherein the display panel is mounted on the housing.

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