Display panel

Abstract

The embodiment of the application discloses a display panel, comprising a back plate and a light shutter layer, the back plate is provided with a plurality of light guide elements and a plurality of light emitting devices, the light guide element has an incident light surface and an outgoing light surface, and the light emitting device is arranged on the incident light surface of the corresponding light guide element; the light shutter layer is arranged on the back plate, the light shutter layer is arranged on the outgoing light surface side of the light guide element, the light shutter layer comprises a plurality of first sub-pixel areas, the outgoing light surface of one light guide element is provided with at least two first sub-pixel areas, and the first sub-pixel area has a light transmission state and a light shielding state, so that the technical problem of low transfer precision of the Micro LED of the large-size and high-resolution display panel can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of display, in particular to a display panel. BACKGROUND

[0002] In recent years, the competition in the display industry has become increasingly fierce, and the update cycle is continuously shortened. The competition between liquid crystal display (LCD) and organic light-emitting diode (OLED) is particularly fierce. With the maturity of OLED technology and materials and the improvement of yield, LCD has gradually lost its market advantage in small size, especially in the mobile phone market. OLED has gradually replaced the position of LCD. In recent years, many new display technologies have emerged, such as quantum dot light emitting diode (QLED) display, electronic ink screen (E-ink), flexible LCD, perovskite light-emitting diode (PeLEDs) display, mini light-emitting diode (Mini LED), micro light-emitting diode (Micro LED), etc. These new technologies still have some problems such as cost, life, reliability, etc., and cannot be mass-produced like LCD and OLED.

[0003] Micro LED has been widely promoted by many enterprises due to its wide color gamut, high contrast, fast response speed, high resolution, long life and other advantages, and is considered as the next generation of most potential new display technology. In the process of research and practice of the prior art, the inventors of the present application found that although Micro LED has been put on the market by multiple manufacturers, it is difficult to directly manufacture on the backplane due to the small size of Micro LED, and therefore needs to be separately manufactured and transferred to the backplane by means of massive transfer. However, due to the problems of transfer precision and other issues of massive transfer, Micro LED market application has been hindered. Specifically, a large number of Micro LEDs are required for a large-size, high-resolution Micro LED display panel. Even if the Micro LED is transferred by means of massive transfer, it also needs to be transferred in multiple batches, which is difficult to ensure the consistency of the transfer precision of Micro LEDs in different batches, and is likely to reduce the yield of products. SUMMARY

[0004] The display panel provided by the embodiments of the present application can solve the technical problem of low transfer precision of MicroLED of a large-size and high-resolution display panel.

[0005] The display panel provided by the embodiments of the present application comprises:

[0006] A back plate is provided with a plurality of light guide elements and a plurality of light emitting devices, the light guide element has a light inlet surface and a light outlet surface, and the light emitting device is arranged on the light inlet surface of the corresponding light guide element; and

[0007] A light shutter layer is arranged on the back plate, the light shutter layer is arranged on the light outlet surface side of the light guide element, the light shutter layer comprises a plurality of first sub-pixel areas, the light outlet surface of one light guide element is arranged corresponding to at least two first sub-pixel areas, and the first sub-pixel area has a light transmission state and a light shielding state.

[0008] Optionally, in some embodiments of the present application, the back plate comprises a plurality of first sub-areas, the plurality of first sub-areas are arranged in an array, and the first sub-area is provided with a plurality of light guide elements and a plurality of light emitting devices.

[0009] Optionally, in some embodiments of the present application, in the first sub-area, the light emitting device comprises a red light emitting device, a green light emitting device and a blue light emitting device, and the red light emitting device, the green light emitting device and the blue light emitting device are arranged corresponding to the light inlet surface of one light guide element respectively.

[0010] Optionally, in some embodiments of the present application, in the light guide element, the light inlet surface and the light outlet surface are arranged opposite to each other.

[0011] Optionally, in some embodiments of the present application, the light guide element further has a bottom surface, a first side surface, a second side surface and a third side surface, the bottom surface is arranged opposite to the light outlet surface, the first side surface is arranged opposite to the light inlet surface, and the second side surface and the third side surface are arranged opposite to each other and between the light outlet surface and the bottom surface.

[0012] The light guide element is provided with a reflection layer, and the reflection layer is arranged on at least one of the bottom surface, the first side surface, the second side surface and the third side surface.

[0013] Optionally, in some embodiments of the present application, in the light guide element, the light inlet surface and the light outlet surface are arranged opposite to each other.

[0014] Optionally, in some embodiments of the present application, the light guide element is provided with a reflection layer, and the reflection layer is arranged on the side surface of the light guide element.

[0015] Optionally, in some embodiments of the present application, the light shutter layer comprises a first electrode layer, a second electrode layer and a liquid crystal layer, the first electrode layer and the second electrode layer are oppositely arranged, and the liquid crystal layer is arranged between the first electrode layer and the second electrode layer.

[0016] Optionally, in some embodiments of the present application, the first electrode layer comprises a plurality of first sub-electrodes corresponding to the first sub-pixel regions.

[0017] Optionally, in some embodiments of the present application, the light shutter layer further comprises a white color resistance layer arranged on a side of the second electrode layer away from the liquid crystal layer.

[0018] The display panel provided by the embodiments of the present application is configured to set a light guide element on a back plate, and configure a light emitting device on a light entrance surface of the light guide element, so that the light guide element can receive light from the light emitting device and emit the light from a light exit surface, i.e., converting a point light emitting mode of the light emitting device into a surface light emitting mode. Meanwhile, the light shutter layer comprises a plurality of first sub-pixel regions, the light exit surface of one light guide element corresponds to at least two first sub-pixel regions, and the first sub-pixel region has a light transmission state and a light blocking state. When the first sub-pixel region is in the light transmission state, the light from the light exit surface of the light guide element can pass through the first sub-pixel region, and when the first sub-pixel region is in the light blocking state, the light from the light exit surface of the light guide element cannot pass through the first sub-pixel region, so as to realize the selective transmission of the light by the light shutter layer. In this structure, compared with the conventional display panel, the number of light emitting devices can be reduced under the same resolution, so as to reduce the number of times of mass transfer, reduce the requirement for the transfer precision of the light emitting device, and bypass the transfer technical bottleneck of the mini light emitting diode or micro light emitting diode industry chain. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort.

[0020] Figure 1 is a cross-sectional structure schematic diagram of a first display panel provided by the embodiments of the present application;

[0021] Figure 2 is a plane structure schematic diagram of a first back plate provided by the embodiments of the present application;

[0022] Figure 3 is a plane structure schematic diagram of a light shutter layer provided by the embodiments of the present application;

[0023] Figure 4is a sectional structure schematic diagram of a second display panel provided by an embodiment of the present application.

[0024] Figure 5 is a plane structure schematic diagram of a second back plate provided by an embodiment of the present application.

[0025] Figure 6 is a plane structure schematic diagram of a third back plate provided by an embodiment of the present application. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person skilled in the art without any creative work under the premise that the embodiments in the present application are within the scope of protection of the present application. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, the orientation words such as "upper" and "lower" generally refer to the upper and lower of the device in the actual use or working state, and the specific direction is the direction of the drawing surface in the drawings; and "inner" and "outer" refer to the contour of the device.

[0027] The embodiments of the present application provide a display panel. The following will be described in detail respectively. It should be noted that the description order of the following embodiments is not limited as the preferred order of the embodiments.

[0028] Please refer to Figures 1 to 3 The embodiments of the present application provide a display panel, which comprises a back plate 100, the back plate 100 is provided with a plurality of light guide elements 130 and a plurality of light emitting devices 140, the light guide element 130 has an incident light surface 131 and an outgoing light surface 132, and the light emitting device 140 is arranged on the incident light surface 131 of the corresponding light guide element 130. In this structure, the light emitted by the light emitting device 140 enters the inside of the light guide element 130 through the incident light surface 131 of the light guide element 130, and finally the light exits from the outgoing light surface 132 of the light guide element 130, so as to extend the light emission of the light emitting device 140 into a light strip, that is, to convert the point light emission mode of the light emitting device 140 into a surface light emission mode.

[0029] Specifically, the display panel further comprises a light shutter layer 200, the light shutter layer 200 is arranged on the back plate 100, the light shutter layer 200 is arranged on the light-out surface 132 side of the light guide element 130, the light shutter layer 200 comprises a plurality of first sub-pixel areas 261, the light-out surface 132 of one light guide element 130 corresponds to the arrangement of at least two first sub-pixel areas 261, the first sub-pixel area 261 has a light-transmitting state and a light-blocking state. When the first sub-pixel area 261 is in the light-transmitting state, the light of the light-out surface 132 of the light guide element 130 can pass through the first sub-pixel area 261, and when the first sub-pixel area 261 is in the light-blocking state, the light of the light-out surface 132 of the light guide element 130 cannot pass through the first sub-pixel area 261, thereby realizing the selective transmission function of the light shutter layer 200 to the light.

[0030] Compared with the traditional display panel, the display panel of the embodiment of the present application can reduce the number of light emitting devices 140 under the condition of the same resolution, thereby reducing the number of times of mass transfer, reducing the requirement for transfer accuracy of the light emitting device 140, bypassing the transfer technical bottleneck of the Mini Light-Emitting Diode (Mini LED) or Micro Light-Emitting Diode (Micro LED) industry chain; in addition, since the number of light emitting devices 140 is reduced, it is also beneficial to reduce the cost.

[0031] Specifically, in the display panel of the embodiment of the present application, the light-out surface 132 of one light guide element 130 corresponds to the arrangement of three first sub-pixel areas 261. Under this structure, compared with the traditional display panel, the number of light emitting devices 140 can be reduced by two-thirds under the condition of the same resolution, thereby reducing the number of times of mass transfer and being beneficial to reduce the cost. Of course, according to the selection and specific requirement setting of the actual situation, the number of first sub-pixel areas 261 corresponding to the light-out surface 132 of one light guide element 130 can be adjusted appropriately, which is not uniquely limited here.

[0032] Specifically, in the display panel of the embodiment of the present application, the light emitting device 140 can be a Mini Light-Emitting Diode or a Micro Light-Emitting Diode, of course, according to the selection and specific requirement setting of the actual situation, the light emitting device 140 can also be other light emitting elements, which is not uniquely limited here. The display panel of the embodiment of the present application retains the advantages of color gamut, brightness and high contrast of the traditional MLED direct display panel.

[0033] Specifically, the back plate 100 further comprises a first substrate 110 and a first driving circuit layer 120, the first driving circuit layer 120 is arranged on the first substrate 110, a plurality of light guide elements 130 and a plurality of light emitting devices 140 are arranged on the first substrate 110, the light emitting device 140 is electrically connected to the first driving circuit layer 120, thereby controlling the individual light emission of the plurality of light emitting devices 140.

[0034] Specifically, the backplane 100 includes a plurality of first partitions 150, the plurality of first partitions 150 are arranged in an array, and the first partitions 150 are provided with a plurality of light guide elements 130 and a plurality of light emitting devices 140, so as to realize uniform light emission of the display panel. In this embodiment, in one first partition 150, one light emitting device 140 can control the bright and dark state of the light-out surface 132 of one light guide element 130, that is, when the light emitting device 140 emits light, the light-out surface 132 of the light guide element 130 corresponding to the light emitting device 140 can be turned on, so as to realize partition control of the brightness of the backplane 100, and the light emitted by the light emitting device 140 does not need to pass through color resistance, fluorescent powder or other color conversion materials for color conversion, so that the contrast is higher.

[0035] Specifically, in the first partition 150, the light emitting device 140 includes a red light emitting device R, a green light emitting device G and a blue light emitting device B, and the red light emitting device R, the green light emitting device G and the blue light emitting device B are respectively arranged corresponding to the light-in surface 131 of one light guide element 130. Under this structure, in one first partition 150, the red light emitting device R, the green light emitting device G and the blue light emitting device B can be turned on separately, so that one, two or three of the red light emitting device R, the green light emitting device G and the blue light emitting device B can be turned on, and when the three are turned on at the same time, the corresponding first sub-pixel area 261 is in a transparent state, at this time, white light can be emitted.

[0036] It should be noted that the red light emitting device R refers to a light emitting device 140 emitting red light, and similarly, the green light emitting device G refers to a light emitting device 140 emitting green light, and the blue light emitting device B refers to a light emitting device 140 emitting blue light.

[0037] Specifically, the light shutter layer 200 includes a plurality of second partitions 260, the plurality of second partitions 260 are arranged in an array, and the second partitions 260 include a plurality of sub-pixel areas, so as to realize uniform light emission of the display panel.

[0038] Specifically, as shown in Figure 1 and Figure 2 In the light guide element 130, the light-in surface 131 and the light-out surface 132 are connected. Under this structure, the cooperation mode between the light guide element 130 and the light emitting device 140 is side-in type.

[0039] Specifically, as shown in Figure 1 and Figure 2As shown in the figure, the light guide element 130 can be rectangular, and the light guide element 130 further has a bottom surface 133, a first side surface 134, a second side surface 135, and a third side surface 136. The bottom surface 133 is arranged opposite to the light exit surface 132, the first side surface 134 is arranged opposite to the light entrance surface 131, and the second side surface 135 and the third side surface 136 are arranged opposite to each other and between the light exit surface 132 and the bottom surface 133. In this embodiment, the light guide element 130 is provided with a reflective layer, and the reflective layer is arranged on at least one of the bottom surface 133, the first side surface 134, the second side surface 135, and the third side surface 136. The reflective layer can improve the utilization rate of light and improve the uniformity of light emitted by the light guide element 130.

[0040] Specifically, as shown in the figures, Figure 4 and Figure 5 In the light guide element 130, the light entrance surface 131 is arranged opposite to the light exit surface 132. In this structure, the light guide element 130 and the light emitting device 140 are back-incident.

[0041] Specifically, as shown in the figures, Figure 4 and Figure 5 The light guide element 130 is provided with a side surface 137 between the light exit surface 132 and the light entrance surface 131, and the light guide element 130 is provided with a reflective layer arranged on the side surface 137 of the light guide element 130. In this embodiment, the light guide element 130 can be rectangular, and the light guide element 130 includes four side surfaces 137, at least one of which is provided with a reflective layer. The reflective layer can improve the utilization rate of light and improve the uniformity of light emitted by the light guide element 130.

[0042] Specifically, the light shutter layer 200 includes a first electrode layer 220, a second electrode layer 230, and a liquid crystal layer 240. The materials of the first electrode layer 220 and the second electrode layer 230 are light-transmitting conductive materials, the first electrode layer 220 and the second electrode layer 230 are arranged opposite to each other, and the liquid crystal layer 240 is arranged between the first electrode layer 220 and the second electrode layer 230. In this structure, by controlling the voltage difference between the first electrode layer 220 and the second electrode layer 230, the deflection angle of the liquid crystal in the liquid crystal layer 240 can be adjusted, so that the first sub-pixel area 261 is switched between the light-transmitting state and the light-blocking state.

[0043] It can be understood that, according to the selection and specific requirements of the actual situation, other ways can be used to realize the selective transmission function of the light shutter layer 200 to the light, so that the first sub-pixel area 261 is switched between the light-transmitting state and the light-blocking state, which is not limited herein.

[0044] Specifically, the first electrode layer 220 includes a plurality of first sub-electrodes 221, and the first sub-electrodes 221 are arranged corresponding to the first sub-pixel area 261. In this structure, by controlling the voltage difference between the first sub-electrode 221 and the second electrode layer 230, the deflection angle of the liquid crystal between the first sub-electrode 221 and the second electrode layer 230 can be adjusted, so that the first sub-pixel area 261 is switched between the light transmission state and the light shielding state.

[0045] Specifically, the second electrode layer 230 is a continuous full-surface structure, and of course, according to the actual situation and specific needs, the second electrode layer 230 can also include a plurality of second sub-electrodes 231, and the second sub-electrodes 231 are arranged corresponding to the first sub-pixel area 261, which is not uniquely limited here.

[0046] Specifically, the shutter layer 200 further includes a second driving circuit layer (not shown in the figure), a second substrate 210, and a third substrate 260. The second driving circuit layer is arranged on the second substrate 210, and the first electrode layer 220, the liquid crystal layer 240, the second electrode layer 230, and the third substrate 260 are arranged on the second driving circuit layer in sequence. Among them, the first sub-electrode 221 is electrically connected to the second driving circuit layer, so that the voltage of the first sub-electrode 221 can be adjusted by the second driving circuit layer to adjust the voltage difference between the first sub-electrode 221 and the second sub-electrode 231.

[0047] Specifically, the shutter layer 200 further includes a white color resistance layer 250, and the white color resistance layer 250 is arranged on the side of the second electrode layer 230 away from the liquid crystal layer 240. In this structure, the light emitted by the light guide element 130 can be emitted through the white color resistance layer 250. The red light emitted by the red light emitting device R is emitted from the light emitting surface 132 of the light guide element after being guided by the corresponding light guide element 130, and then is emitted after passing through the first sub-electrode 221, the liquid crystal layer 240, the second sub-electrode 231, and the white color resistance layer 250; Similarly, the red light emitted by the green light emitting device G is emitted from the light emitting surface 132 of the light guide element after being guided by the corresponding light guide element 130, and then is emitted after passing through the first sub-electrode 221, the liquid crystal layer 240, the second sub-electrode 231, and the white color resistance layer 250; The red light emitted by the blue light emitting device B is emitted from the light emitting surface 132 of the light guide element after being guided by the corresponding light guide element 130, and then is emitted after passing through the first sub-electrode 221, the liquid crystal layer 240, the second sub-electrode 231, and the white color resistance layer 250. The red light, green light and blue light do not need to be converted in color by color conversion material, which is conducive to improving the color gamut of the display panel.

[0048] Specifically, as shown in FIG. 6, the display panel 100 includes a plurality of light guide elements 130, a plurality of light emitting devices R, G, and B, and a plurality of first sub-pixel areas 261. Figure 6As shown in the figure, in the light guide element 130, the light-in surface 131 and the light-out surface 132 are connected. In this structure, the cooperation mode between the light guide element 130 and the light emitting device 140 is side-in type. In this embodiment, the light shutter layer 200 further comprises a second sub-pixel area 262, the second sub-pixel area 262 is arranged corresponding to the light emitting device 140, and the second sub-pixel area 262 has a light-transmitting state and a light-blocking state. When the second sub-pixel area 262 is in the light-transmitting state, the light of the light emitting device 140 can directly transmit through the second sub-pixel area 262, and when the second sub-pixel area 262 is in the light-blocking state, the light of the light emitting device 140 cannot transmit through the second sub-pixel area 262, thereby realizing the selective transmission function of the light shutter layer 200 to the light, thereby improving the resolution of the display panel. In this embodiment, the first electrode layer 220 further comprises a first sub-electrode 221 arranged corresponding to the second sub-pixel area 262, and the second electrode layer 230 further comprises a second sub-electrode 231 arranged corresponding to the second sub-pixel area 262.

[0049] The display panel provided by the embodiments of the present application is described in detail above, and the principles and implementation manners of the present application are described by applying specific examples. The above embodiment is only used to help understand the method of the present application and its core idea; meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation manner and application range will be changed, and the above description should not be understood as the limitation of the present application.

Claims

1. A display panel, characterized in that, include: The back panel includes multiple first partitions arranged in an array, and each first partition is provided with multiple light guide elements and multiple light-emitting devices. Each of the light guide elements has a light incident surface and a light emitting surface. The light-emitting device is a mini light-emitting diode or a micro light-emitting diode. The light-emitting device includes a red light-emitting device, a green light-emitting device, and a blue light-emitting device. The red light-emitting device, the green light-emitting device, and the blue light-emitting device are respectively arranged corresponding to the light incident surface of one of the light guide elements. as well as A light shutter layer is disposed on the back plate and on the light-emitting surface side of the light guide element. The light shutter layer includes a plurality of first sub-pixel areas. At least two first sub-pixel areas are disposed on the light-emitting surface of one light guide element, so that each light-emitting device forms at least two pixels of the same color. The first sub-pixel areas have a light-transmitting state and a light-blocking state.

2. The display panel as described in claim 1, characterized in that, In the light guide element, the light-incident surface and the light-outcident surface are connected.

3. The display panel as described in claim 2, characterized in that, The light guide element also has a bottom surface, a first side surface, a second side surface, and a third side surface. The bottom surface is disposed opposite to the light emitting surface, the first side surface is disposed opposite to the light incident surface, and the second side surface and the third side surface are disposed opposite to each other and between the light emitting surface and the bottom surface. The light guide element is provided with a reflective layer, which is provided on at least one of the bottom surface, the first side surface, the second side surface, and the third side surface.

4. The display panel as described in claim 1, characterized in that, In the light guide element, the light incident surface and the light emitting surface are arranged opposite to each other.

5. The display panel as described in claim 4, characterized in that, The light guide element is provided with a reflective layer, which is disposed on the side of the light guide element.

6. The display panel as described in any one of claims 1-5, characterized in that, The light gate layer includes a first electrode layer, a second electrode layer, and a liquid crystal layer. The first electrode layer and the second electrode layer are disposed opposite to each other, and the liquid crystal layer is disposed between the first electrode layer and the second electrode layer.

7. The display panel as described in claim 6, characterized in that, The first electrode layer includes a plurality of first sub-electrodes, and the first sub-electrodes are disposed corresponding to the first sub-pixel area.

8. The display panel as described in claim 6, characterized in that, The light gate layer also includes a white color resist layer, which is disposed on the side of the second electrode layer away from the liquid crystal layer.

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