Display panel, display device and mask plate

Abstract

The invention provides a display panel, a display device and a mask plate. The display panel comprises a first display area, a second display area and a transition area located between the first display area and the second display area. The display panel comprises a substrate and a light-emitting module arranged on one side of the substrate. The light-emitting film group comprises a first electrode layer, the first electrode layer comprises a first electrode part located in the first display area and a second electrode part located in the second display area, a gap is formed between the first electrode part and the second electrode part, and the gap is located in the transition area, so that the yield of the display panel is increased, and the service life of the display panel is prolonged.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display panel, a display device and a mask. Background Art

[0002] At present, terminal products such as foldable mobile phones are gradually adopting an internal and external dual-screen design. The dual-screen design usually includes a main screen and a secondary screen. The main screen is used for the front display of the terminal, and the secondary screen is set on the back of the terminal. Users can use the secondary screen to check the time, weather, receive text messages, make calls, etc. However, in the production process of foldable display panels with dual-screen design, it was found that the panel yield rate was low. Therefore, how to improve the yield rate of dual-screen foldable display panels has become a problem that needs to be solved at present. Summary of the invention

[0003] The object of the present invention is to provide a display panel, a display device and a mask plate to solve the problem of low yield of dual-screen folding display panels.

[0004] To achieve the above object, the present invention provides a display panel, the display panel comprising a first display area, a second display area and a transition area between the first display area and the second display area. The display panel comprises a substrate and a light-emitting module. The light-emitting film group is arranged on one side of the substrate and covers the first display area, the transition area and the second display area.

[0005] The light-emitting film group includes a first electrode layer, the first electrode layer includes a first electrode portion and a second electrode portion. The first electrode portion is located in the first display area. The second electrode portion is located in the second display area. There is a gap between the first electrode portion and the second electrode portion, and the gap is located in the transition area.

[0006] Furthermore, the light-emitting film group further includes a second electrode layer, the second electrode layer being located between the first electrode layer and the substrate. The substrate includes a first wiring layer, the first wiring layer being arranged on a side of the second electrode layer away from the first electrode layer. A first opening is arranged in the second electrode layer, and an orthographic projection of the first wiring layer on the second electrode layer covers the first opening.

[0007] Furthermore, the display panel further comprises a touch wiring layer, and the touch wiring layer is arranged on a side of the light emitting module away from the substrate. Preferably, the material of the touch wiring layer comprises metal.

[0008] Further, the first routing layer includes a first signal line and a second signal line. The orthographic projection of the first signal line on the second electrode layer covers the first opening. The second signal line extends in a first direction and surrounds the first signal line. Preferably, a second opening is provided in the second electrode layer, and the orthographic projection of the second signal line on the second electrode layer covers the second opening.

[0009] Further, the line width of the first signal line is greater than or equal to the width of the first opening. Preferably, the line width of the second signal line is greater than or equal to the width of the second opening.

[0010] Furthermore, the substrate further comprises a driving layer and a second routing layer, wherein the driving layer is located on a side of the first routing layer away from the light-emitting module. The second routing layer is disposed between the driving layer and the first routing layer and is electrically connected to the driving layer, and the first signal line is electrically connected to the second routing layer. Preferably, the second routing layer comprises a third signal line, wherein the third signal line extends in a second direction perpendicular to the first direction, and the first signal line is electrically connected to the third signal line.

[0011] Further, the materials of the first wiring layer, the second wiring layer and the second electrode layer include at least one of metal and conductive oxide. Preferably, the materials of the first wiring layer, the second wiring layer and the second electrode layer include at least one of titanium, aluminum, silver and indium tin oxide.

[0012] Further, the substrate further comprises a first flat layer and a second flat layer. The first flat layer is arranged between the first wiring layer and the light-emitting module. The second flat layer is arranged between the first wiring layer and the second wiring layer. Preferably, the materials of the first flat layer and the second flat layer comprise organic materials.

[0013] The present invention further provides a display device, which includes the display panel as described above.

[0014] The present invention also provides a mask plate for preparing the display panel as described above, the mask plate comprising a plate body, the plate body comprising a first hollow portion, a second hollow portion, a shielding portion and a supporting portion. The first hollow portion corresponds to the first display area of ​​the display panel. The second hollow portion corresponds to the second display area of ​​the display panel. The shielding portion surrounds the first hollow portion and the second hollow portion. Both ends of the supporting portion are connected to the shielding portion and correspond to the transition area of ​​the display panel.

[0015] The advantages of the present invention are as follows: the display panel and display device provided by the present invention, by designing a special-shaped structure for the first electrode layer in the light-emitting module, can adapt to the first display area and the second display area of ​​different sizes, prevent the first electrode layer from entering the cutting path of the panel, and thus prevent water vapor from entering the display area along the first electrode layer in the cutting path, thereby extending the service life of the display panel. At the same time, the present invention also provides a mask template, which can prepare the first electrode layer of the special-shaped structure in the above-mentioned display panel at one time, thereby reducing the production steps, speeding up the production efficiency, and also reducing the number of mask templates used in the production process, thereby reducing the production cost. In addition, the mask template provided in the embodiment of the present invention also increases the yield rate of the display panel by adding a support portion, while not affecting the structure of the first electrode layer, while preventing the mask template from scratching the panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A schematic diagram of partitions of a display panel in an embodiment of the present invention;

[0018] Figure 2 A schematic diagram of a layered structure of a display panel in a transition zone in an embodiment of the present invention;

[0019] Figure 3 is a schematic diagram of the planar structure of the first electrode layer in an embodiment of the present invention;

[0020] Figure 4 is a schematic diagram of a planar structure of a mask plate in an embodiment of the present invention;

[0021] Figure 5 Schematic diagram of the wiring structure of the display panel in the transition zone in an embodiment of the present invention.

[0022] The components in the figure are shown as follows:

[0023] Display panel 100; First display area AA1;

[0024] Second display area AA2; Transition area TA;

[0025] Substrate 110; First wiring layer 111;

[0026] A first signal line 1111; A second signal line 1112;

[0027] Data line 1113; Second wiring layer 112;

[0028] A third signal line 1121; a driving layer 113;

[0029] A first flat layer 114; A second flat layer 115;

[0030] Light emitting module 120; First electrode layer 121;

[0031] A first electrode portion 1211; A second electrode portion 1212;

[0032] Gap 1213; Second electrode layer 122;

[0033] A first opening 1221; A second opening 1222;

[0034] Touch wiring layer 130; Mask plate 200;

[0035] Plate body 210; First hollow portion 211;

[0036] A second hollow portion 212; A shielding portion 213;

[0037] Support portion 214. DETAILED DESCRIPTION

[0038] The preferred embodiments of the present invention are described below with reference to the drawings in the specification to prove that the present invention can be implemented. The embodiments of the invention can fully introduce the present invention to those skilled in the art, making its technical content clearer and easier to understand. The present invention can be embodied through many different forms of embodiments of the invention, and the protection scope of the present invention is not limited to the embodiments mentioned in the text.

[0039] In the drawings, components with the same structure are indicated by the same numerical reference numerals, and components with similar structures or functions are indicated by similar numerical reference numerals. The size and thickness of each component shown in the drawings are arbitrarily shown, and the present invention does not limit the size and thickness of each component. In order to make the illustration clearer, the thickness of the components is appropriately exaggerated in some places in the drawings.

[0040] In addition, the following descriptions of the various embodiments of the invention are made with reference to the attached diagrams to illustrate specific embodiments of the invention that the present invention can be implemented with. The directional terms mentioned in the present invention, such as "upper", "lower", "front", "back", "left", "right", "inner", "outer", "side", etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are for better and clearer description and understanding of the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0041] When some components are described as being "on" another component, the component may be directly placed on the other component; there may also be an intermediate component on which the component is placed, and the intermediate component is placed on the other component. When a component is described as being "mounted on" or "connected to" another component, the two may be understood to be directly "mounted on" or "connected", or one component may be indirectly "mounted on" or "connected to" another component via an intermediate component.

[0042] In related display technologies, since the main screen and the sub-screen are of different sizes, the panel needs to be cut, and there must be no cathode at the cutting path, otherwise water vapor will invade the display area along the cathode in the cutting path, causing the devices inside the display panel to fail, generating black spots and affecting the display effect.

[0043] In an embodiment of the present invention, a display device is provided, which may be an OLED (Organic Light-Emitting Diode) display device, comprising a display panel 100, which is used to provide a display screen for the display device to implement interactive operations. The display device may be any display device with a display function, such as a mobile phone, a laptop computer, a tablet computer, etc.

[0044] like Figure 1 As shown, the display panel 100 includes a first display area AA1, a second display area AA2, and a transition area TA located between the first display area AA1 and the second display area AA2. Among them, the first display area AA1 is used as a main display area to display the main operation interface of the display device, which can present all information content for the display device; the second display area AA2 is used as a secondary display area to display the simple operation interface of the display device, which can present simple information such as time, weather, message, caller information, etc. for the display device; the transition area TA is used to connect the first display area AA1 and the second display area AA2, so as to realize the signal connection between the first display area AA1 and the second display area AA2. At the same time, the display panel 100 uses a flexible material in the transition area TA, and the second display area AA2 can be bent to the back of the first display area AA1, so as to realize the upper double-sided display. Further, the display area of ​​the first display area AA1 is larger than the display area of ​​the second display area AA2, and the display panel 100 also uses a flexible material in the first display area AA1, so that the display panel 100 in the first display area AA1 can realize the bending display.

[0045] Specifically, Figure 2 As shown, the display panel 100 includes a substrate 110 and a light emitting module 120 .

[0046] The substrate 110 is an array substrate 110, which includes a plurality of array-arranged TFT (Thin Film Transistor) devices and a plurality of signal lines. The TFT devices drive the light-emitting module 120 according to the signals transmitted by the signal lines, so that the light-emitting module 120 emits corresponding light according to the display requirements of the display device.

[0047] The light emitting module 120 is disposed on one side of the array substrate 110 and includes a plurality of light emitting devices, which may be OLED light emitting devices. The light emitting devices are electrically connected to the TFT devices in the substrate 110 and emit light under the drive of the TFT devices to form a display screen.

[0048] Specifically, the light-emitting module 120 includes a first electrode layer 121, a light-emitting layer, and a second electrode layer 122. The second electrode layer 122 is arranged on the surface of the substrate 110, and includes a plurality of second electrodes. The second electrodes are arranged in the first display area AA1, the second display area AA2, and the bending area, and the second electrodes located in the first display area AA1 and the second display area AA2 are electrically connected to the TFT device in the substrate 110. The light-emitting layer stack is arranged on the surface of the second electrode layer 122 away from the substrate 110. The first electrode layer 121 is arranged on the side of the light-emitting layer away from the second electrode layer 122, and is located in the first display area AA1 and the second display area AA2. In the first display area AA1 and the second display area AA2, the first electrode layer 121 and the second electrode layer 122 transmit electrons and holes to the light-emitting layer under the drive of the substrate 110, and the electrons and holes are combined in the light-emitting layer to form excitons, thereby converting electrical energy into light energy, prompting the display panel 100 to emit light. The first electrode in the first electrode layer 121 is a cathode, and the second electrode in the second electrode layer 122 is an anode.

[0049] Since the display areas of the first display area AA1 and the second display area AA2 are different, the first electrode layer 121 provided in the embodiment of the present invention is a special-shaped structure to adapt to the different sizes of the first display area AA1 and the second display area AA2. Figure 3 As shown, the first electrode layer 121 of the special-shaped structure includes a first electrode portion 1211 located in the first display area AA1 and a second electrode portion 1212 located in the second display area AA2. The size of the first electrode portion 1211 is larger than the size of the second electrode portion 1212, and the first electrode portion 1211 and the second electrode portion 1212 of different sizes are combined to form the first electrode layer 121 of the special-shaped structure. By designing the first electrode layer 121 as a special-shaped structure, the first electrode layer 121 is prevented from covering the cutting path of the panel, thereby preventing water vapor from entering the display area along the first electrode layer in the cutting path and corroding the display device located in the display area, thereby extending the service life of the display panel 100.

[0050] In order to prepare the first electrode layer 121 with the above-mentioned special-shaped structure, a mask plate 200 is also provided in the embodiment of the present invention. Figure 4 As shown, the mask plate 200 has a plate body 210, and the plate body 210 includes a shielding portion 213, a first hollow portion 211, a second hollow portion 212 and a support portion 214. The first hollow portion 211 corresponds to the first display area AA1, the second hollow portion 212 corresponds to the second display area AA2 of the display panel 100, the shielding portion 213 surrounds the first hollow portion 211 and the second hollow portion 212, and the support portion 214 corresponds to the transition area TA of the display panel 100, that is, the support portion 214 is arranged between the first hollow and the second hollow area and its two ends are connected to the shielding portion 213. The first hollow portion 211 and the second hollow portion 212 penetrate the plate body 210, thereby forming a hollow structure on the plate body 210 that allows the evaporation material to pass through; the shielding portion 213 shields the area outside the first display area AA1 and the second display area AA2 of the display panel 100 to prevent the evaporation material from being formed in the area outside the first display area AA1 and the second display area AA2; the supporting portion 214 is used to connect and support the plate body 210 located between the first hollow portion 211 and the second hollow portion 212 to prevent the plate body 210 located between the first hollow portion 211 and the second hollow portion 212 from sinking and scratching the substrate 110. Preferably, the width of the supporting portion 214 is less than or equal to the width of the transition area TA of the display panel 100.

[0051] When preparing the first electrode layer 121, the mask plate 200 is placed above the vapor deposition surface of the semi-finished display panel 100 (i.e., the surface of the light-emitting layer facing away from the first electrode layer 121), and the plate body 210 of the mask plate 200 is projected on the semi-finished display panel 100 to completely cover the semi-finished display panel 100, so that the shielding portion 213 of the mask plate 200 can shield the area outside the first display area AA1 and the second display area AA2 of the display panel 100, and the vapor deposition material can be deposited in the first display area AA1 and the second display area AA2 of the panel through the first hollow portion 211 and the second hollow portion 212, thereby simultaneously forming the first electrode portion 1211 and the second electrode portion 1212 of different sizes. In the related art, it is usually necessary to use two mask plates 200 and prepare the first electrode portion 1211 and the second electrode portion 1212 respectively through two processes. However, the mask plate 200 provided in the embodiment of the present invention can simultaneously prepare the first electrode portion 1211 and the second electrode portion 1212 through one process, which not only reduces one production step, but also reduces the use of one mask plate 200, thereby achieving the effect of reducing production costs and improving production efficiency.

[0052] Furthermore, the display panel 100 further includes a touch wiring layer 130, such as Figure 2As shown in FIG. 1 , the touch wiring layer 130 is disposed on a side of the light emitting module 120 away from the substrate 110. The touch wiring layer 130 is provided with a plurality of touch signal wirings for transmitting touch signals, thereby realizing touch control.

[0053] The substrate 110 includes a driving layer 113, a first wiring layer 111 and a second wiring layer 112. The second wiring layer 112 is arranged on a side of the driving layer 113 facing the light-emitting module 120, and the first wiring layer 111 is arranged on a side of the second wiring layer 112 away from the driving layer 113. Figure 2 and Figure 5 As shown in , the first wiring layer 111 includes a first signal line 1111, a second signal line 1112 and a data line 1113, and the second wiring layer 112 includes a third signal line 1121. The second signal line 1112 extends along the first direction and surrounds the first signal line 1111. The first signal line 1111 and the second signal line 1112 are respectively used to transmit a low-level signal and a high-level signal; preferably, the first signal line 1111 is used to transmit a low-level signal, and the second signal line 1112 is used to transmit a high-level signal. The data line 1113 also extends along the first direction, and is located between two adjacent second signal lines 1112. The data line 1113 is used to transmit a data signal with display information. The third signal line 1121 extends along a second direction perpendicular to the first direction. The first signal line 1111 is electrically connected to the third signal line 1121, so that signal transmission is achieved between two adjacent first signal lines 1111 in the second direction through the third signal line 1121. Meanwhile, the third signal line 1121 is also electrically connected to the driving layer 113.

[0054] In the embodiment of the present invention, since the support portion 214 is provided in the mask 200, the support portion 214 will block the transition area TA, so that there is a gap 1213 between the first electrode portion 1211 and the second electrode portion 1212 in the first electrode layer 121, and the gap 1213 is located in the transition area TA. At the same time, a plurality of first openings 1221 and a plurality of second openings 1222 are provided in the second electrode layer 122. The inventor of the present application found that the gap 1213 between the first electrode portion 1211 and the second electrode portion 1212 prevents the first electrode layer 121 from completely covering the transition area TA and forming a metal shielding structure, thereby causing the signal transmitted by the touch wiring in the touch wiring layer 130 and the signal transmitted by the signal wiring in the substrate 110 to couple and interfere with each other through the gap 1213 in the first electrode layer 121 and the opening in the second electrode layer 122, affecting the sensitivity of the touch function, and also affecting the display effect of the display panel 100.

[0055] Therefore, in the embodiment of the present invention, the first wiring layer 111 in the substrate 110 and the opening in the second electrode layer 122 are stacked, that is, the orthographic projection of the first wiring layer 111 on the second electrode layer 122 covers the first opening 1221 and the second opening 1222 in the second electrode layer 122 . Specifically, the orthographic projection of the first signal line 1111 on the second electrode layer 122 covers the first opening 1221, and the orthographic projection of the second signal line 1112 on the second electrode layer 122 covers the second opening 1222, so that the first signal line 1111 and the second signal line 1112 in the first wiring layer 111 can fill the opening position of the second electrode layer 122, so that the first wiring layer 111 and the second electrode layer 122 are combined to form a staggered signal shielding structure, and through this staggered signal shielding structure, a barrier is generated between the touch signal in the touch wiring layer 130 and the display signal in the substrate 110, preventing coupling and signal interference between the touch wiring layer 130 and the substrate 110, thereby improving the touch sensitivity and display effect of the display panel 100. Preferably, the line width of the first signal line 1111 is greater than or equal to the width of the first opening 1221, and the line width of the second signal line 1112 is greater than or equal to the width of the second opening 1222.

[0056] The materials of the first wiring layer 111 in the substrate 110, the second wiring layer 112, the second electrode layer 122 in the light-emitting module 120, and the touch wiring layer 130 include one of metal and conductive oxide; for example, the materials of the first wiring layer 111, the second wiring layer 112, the second electrode layer 122, and the touch wiring layer 130 include at least one of titanium, aluminum, silver, and indium tin oxide. Preferably, the first wiring layer 111, the second wiring layer 112, the second electrode layer 122, and the touch wiring layer 130 can all adopt a laminated structure of multiple conductive film layers; for example, the first wiring layer 111, the second wiring layer 112, and the touch wiring layer 130 can be a laminated structure of titanium / aluminum / titanium (Ti / Al / Ti), and the first electrode layer 121 can be a laminated structure of indium tin oxide / silver / indium tin oxide (ITO / Ag / ITO).

[0057] Furthermore, the substrate 110 also includes a first flat layer 114 and a second flat layer 115. The first flat layer 114 is provided between the first wiring layer 111 and the light-emitting module 120, and is used to insulate the signal wiring in the first wiring layer 111 from the first electrode layer 121 of the light-emitting module 120. The second flat layer 115 is provided between the second wiring layer 112 and the driving layer 113, and is used to insulate the signal wiring in the second wiring layer 112 from the conductive structure in the driving layer 113. At the same time, the first flat layer 114 and the second flat layer 115 both have the function of flattening the surface of the substrate 110. The materials of the first flat layer 114 and the second flat layer 115 include organic materials.

[0058] In the display panel provided in the embodiment of the present invention, the first electrode layer in the light-emitting module is designed with a special-shaped structure to adapt to the first display area and the second display area of ​​different sizes, to prevent the first electrode layer from entering the cutting path of the panel, thereby preventing water vapor from entering the display area along the first electrode layer in the cutting path to corrode the display device in the display panel. In addition, the display panel in the embodiment of the present invention also forms a shielding structure by staggering the signal routing in the substrate and the second electrode layer in the invention module, to prevent the touch signal and the display signal in the substrate from coupling and interfering with each other, thereby improving the touch performance and display effect of the display panel.

[0059] At the same time, the mask provided in the embodiment of the present invention can prepare the first electrode part and the second electrode part in the first electrode layer at one time, thereby reducing the production steps, improving the production efficiency, and reducing the number of mask plates used in the production process, thereby reducing the production cost. In addition, the mask provided in the embodiment of the present invention also prevents the mask plate from scratching the panel without affecting the structure of the first electrode layer by adding a support part, thereby improving the yield rate of the display panel.

[0060] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the various dependent claims and features described herein may be combined in a manner different from that described in the original claims. It should also be understood that features described in conjunction with individual embodiments may be used in other described embodiments.

Claims

1. A display panel, characterized in that: comprising a first display area, a second display area, and a transition area between the first display area and the second display area; The display panel comprises: substrate; A light-emitting film group, disposed on one side of the substrate and covering the first display area, the transition area and the second display area; The light-emitting film group includes a first electrode layer, and the first electrode layer includes: A first electrode portion, located in the first display area; A second electrode portion, located in the second display area; A gap is provided between the first electrode portion and the second electrode portion, and the gap is located in the transition region.

2. The display panel according to claim 1, wherein: The luminous film group also includes: A second electrode layer, located between the first electrode layer and the substrate; The substrate comprises: A first wiring layer, provided on a side of the second electrode layer away from the first electrode layer; The second electrode layer is provided with a first opening, and the orthographic projection of the first wiring layer on the second electrode layer covers the first opening.

3. The display panel according to claim 2, wherein: Also includes: A touch wiring layer is arranged on a side of the light emitting module away from the substrate; Preferably, the material of the touch wiring layer includes metal.

4. The display panel according to claim 2, wherein: The first routing layer comprises: a first signal line, wherein an orthographic projection of the first signal line on the second electrode layer covers the first opening; A second signal line extending in a first direction and surrounding the first signal line; Preferably, a second opening is provided in the second electrode layer, and the orthographic projection of the second signal line on the second electrode layer covers the second opening.

5. The display panel according to claim 3, wherein: The line width of the first signal line is greater than or equal to the width of the first opening; Preferably, a line width of the second signal line is greater than or equal to a width of the second opening.

6. The display panel according to claim 3, wherein: The substrate further comprises: A driving layer, located at a side of the first wiring layer away from the light-emitting module; The second wiring layer is arranged between the driving layer and the first wiring layer and is electrically connected to the driving layer. The first signal line is electrically connected to the second wiring layer. Preferably, the second routing layer includes a third signal line, the third signal line extends along a second direction perpendicular to the first direction, and the first signal line is electrically connected to the third signal line.

7. The display panel according to claim 5, wherein: The materials of the first wiring layer, the second wiring layer and the second electrode layer include at least one of metal and conductive oxide; Preferably, the material of the first wiring layer, the second wiring layer and the second electrode layer includes at least one of titanium, aluminum, silver and indium tin oxide.

8. The display panel according to claim 5, wherein: The substrate further comprises: A first flat layer, provided between the first wiring layer and the light-emitting module; A second planar layer, provided between the first wiring layer and the second wiring layer; Preferably, the materials of the first planar layer and the second planar layer include organic materials.

9. A display device, characterized in that: Comprising a display panel as described in any one of claims 1-8.

10. A mask for preparing a display panel according to any one of claims 1 to 8, characterized in that: include: The plate body comprises: A first hollow portion, corresponding to a first display area of ​​the display panel; A second hollow portion corresponding to a second display area of ​​the display panel; A shielding portion, surrounding the first hollow portion and the second hollow portion; The supporting part has two ends connected to the shielding part and corresponds to the transition area of ​​the display panel.

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