CN110767826B - Display panel and display terminal - Google Patents
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- CN110767826B CN110767826B CN201811290651.3A CN201811290651A CN110767826B CN 110767826 B CN110767826 B CN 110767826B CN 201811290651 A CN201811290651 A CN 201811290651A CN 110767826 B CN110767826 B CN 110767826B
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/60—OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes
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Abstract
The invention relates to a display panel and a display terminal, wherein the display panel comprises a substrate, a first light-emitting structure positioned in a first display area, and a second light-emitting structure positioned in a second display area, the first light-emitting structure comprises a first supporting column, the second light-emitting structure comprises a second supporting column, wherein the plane where the outer surface of the substrate is positioned is taken as a height measurement zero point, and the absolute value of the difference value between the height of the first supporting column and the height of the second supporting column is not more than 1.5 micrometers. The height of the first supporting column is equivalent to that of the second supporting column, the mask plate is placed on the first supporting column and the second supporting column, the mask plate is not prone to tilting, and damage to the mask plate is reduced. Furthermore, the mask plate is arranged on the first support column and the second support column which are close in height, so that the probability of abnormal color mixing during evaporation is reduced.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel and a display terminal.
Background
With the rapid development of electronic devices, the requirements of users on screen occupation ratio are higher and higher, so that the comprehensive screen display of the electronic devices is concerned more and more in the industry. Traditional electronic equipment such as cell-phone, panel computer etc. owing to need integrate such as leading camera, earphone and infrared sensing element etc. so the accessible is slotted (Notch) on the display screen, sets up camera, earphone and infrared sensing element etc. in the fluting region, but the fluting region is not used for the display screen, like the bang screen among the prior art, or adopts the mode of trompil on the screen, to the electronic equipment who realizes the function of making a video recording, external light accessible screen on trompil department get into the photosensitive element who is located the screen below. However, these electronic devices are not all full-screen in the true sense, and cannot display in each area of the whole screen, for example, the camera area cannot display the picture.
Disclosure of Invention
Based on this, in order to solve the technical problem that the mask that is used for the coating by vaporization pixel that exists among the conventional art is easily damaged, the application provides a display panel and display terminal.
A display panel, comprising: the display device comprises a substrate, a first display area and a second display area, wherein the first display area and the second display area are adjacent to each other and are used for displaying dynamic or static pictures, and a photosensitive device can be arranged below the first display area; the first light-emitting structure is arranged in the first display area and comprises a first pixel limiting layer and a first support column positioned on the first pixel limiting layer; the second light-emitting structure is arranged in the second display area and comprises a second pixel limiting layer and a second supporting column positioned on the second pixel limiting layer; and taking the plane where the outer surface of the substrate is located as a height measurement zero point, wherein the absolute value of the difference between the height of the first support column and the height of the second support column is not more than 1.5 microns.
In one embodiment, the first display area is provided with a first display panel, the second display area is provided with a second display panel, the first display panel is a PMOLED display panel, or the first display panel is an AMOLED display panel or an AMOLED-like display panel, and a pixel circuit of the AMOLED-like display panel only includes one switching element; the second display panel is a PMOLED display panel or an AMOLED display panel.
In one embodiment, the absolute value of the difference between the first support column height and the second support column height is no greater than 0.5 microns.
In one embodiment, the first support column height is equal to the first support column height.
In one embodiment, the substrate further comprises a pixel circuit disposed in the second display region;
the first support column height is not greater than the first support column height.
In one embodiment, the cross-sectional shapes of the first pixel defining layer and the first supporting column are both inverted trapezoids, and the cross-sectional shapes of the second pixel defining layer and the second supporting column are both regular trapezoids along the direction perpendicular to the substrate; preferably, the first pixel defining layer and the first supporting pillar are made of a light-transmitting material.
In one embodiment, the first display area is a transparent display area; the display panel further comprises an isolation column arranged at the junction of the first display area and the second display area, and the isolation column is used for insulating a second electrode layer corresponding to the first display area from a second electrode layer corresponding to the second display area.
In one embodiment, the first support pillar and the isolation pillar are formed in the same process step; the light emitting layer of the first light emitting structure and the light emitting layer of the second light emitting structure are formed in the same evaporation step.
A display terminal, comprising: an apparatus body having a device region; the display panel according to any one of the above embodiments, which covers the device body; the device area is located below the first display area, and a photosensitive device for collecting light through the first display area is arranged in the device area. Preferably, the device region is a trench region; and the photosensitive device comprises a camera and/or a light sensor.
Above-mentioned display panel and display terminal, this display panel include the base plate, be located the first light-emitting structure of first display area, be located the second light-emitting structure of second display area, and first light-emitting structure includes first support column, and the second light-emitting structure includes the second support column. And taking the plane where the outer surface of the substrate is located as a height measurement zero point, wherein the absolute value of the difference between the height of the first supporting column and the height of the second supporting column is not more than 1.5 microns. The mask plate is placed on the first supporting column and the second supporting column, the mask plate is not prone to tilting, and damage to the mask plate is reduced. Furthermore, the mask plate is arranged on the first support column and the second support column which are close in height, so that the probability of abnormal color mixing during evaporation is reduced.
Drawings
FIG. 1 is a schematic longitudinal cross-sectional view of a display panel;
FIG. 2a to FIG. 2c are partial cross-sectional views of a display panel according to an embodiment;
FIG. 2d is a partial cross-sectional view of an AMOLED-like display panel in an embodiment;
FIG. 2e is a schematic circuit diagram of a pixel circuit of an AMOLED-like display panel in an embodiment;
FIG. 2f is a partial cross-sectional view of the AMOLED display panel in one embodiment;
FIG. 3 is a partial cross-sectional view of a display panel in one embodiment;
FIG. 4 is a partial cross-sectional view of a display panel in one embodiment;
FIG. 5 is a diagram illustrating an exemplary display terminal;
fig. 6 is a schematic structural diagram of an apparatus body in an embodiment.
Detailed Description
As in the background art, since conventional electronic devices such as mobile phones and tablet computers need to integrate a front camera, an earpiece and an infrared sensing element, the front camera, the earpiece and the infrared sensing element can be disposed in a slotted area by slotting (Notch) on a display screen. However, the slotted region is not used for displaying pictures, such as a bang screen in the prior art, or a hole is formed in the screen, and for an electronic device implementing a camera function, external light can enter the photosensitive element located below the screen through the hole in the screen. However, these electronic devices are not all full-screen in the true sense, and cannot display in each area of the whole screen, for example, the camera area cannot display the picture.
To solve the above problems, technical personnel have developed a display screen, which realizes the full-screen display of electronic equipment by setting a transparent display panel in a slotted area. The display panel is provided with a first display area and a second display area which are adjacent; the first display area and the second display area are both used for displaying dynamic or static pictures. And a photosensitive device can be arranged below the first display area, so that a full screen is realized in the real sense.
The display panel for realizing full-screen display by using the transparent display panel comprises a transparent display area and a non-transparent display area, and cathodes of the transparent display area need to be mutually insulated. Through research, the inventor finds that in order to cut off the connection between the cathodes, a process of adding an isolation column at the cathode position corresponding to the transparent display area is adopted, the isolation column is in an inverted trapezoid shape, and the cathode is cut off by utilizing the inward extending side edge of the inverted trapezoid. Thus, the resolution of the transparent display region can be improved by using a Common mask, and the manufacturing accuracy of the mask used for preparing the cathode can be reduced. However, the thickness of the isolation pillars of the transparent display region ranges from 1.5 micrometers to 3.5 micrometers, and the support pillars corresponding to the non-transparent region are not on the same horizontal plane with the isolation pillars and have an excessive height difference therebetween. Therefore, when a precise mask (Fine mask) is used for pixel evaporation, the precise mask is placed on the support columns and the isolation columns with large height difference, so that the precise mask is inclined for a long time, and damage to the mask is increased.
Therefore, in the process of producing a full-face screen comprising a transparent display screen, in order to reduce the damage probability of a mask plate for evaporating pixels, the embodiment of the application provides a display panel and a display terminal, wherein the display panel comprises a substrate and is provided with a first display area and a second display area which are adjacent; the first light-emitting structure is arranged in the first display area and comprises a first pixel limiting layer and a first support column positioned on the first pixel limiting layer; the second light-emitting structure is arranged in the second display area and comprises a second pixel limiting layer and a second supporting column positioned on the second pixel limiting layer; and taking the plane where the outer surface of the substrate is located as a height measurement zero point, wherein the absolute value of the difference between the height of the first support column and the height of the second support column is not more than 1.5 microns. The height of the first supporting column is equivalent to that of the second supporting column, the mask plate is placed on the first supporting column and the second supporting column, the mask plate is not prone to tilting, and damage to the mask plate is reduced. Furthermore, the mask plate is arranged on the first support column and the second support column which are close in height, so that the probability of abnormal color mixing during evaporation is reduced.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
First, a basic structure of a display panel including a substrate 110, a driving layer 120, a planarization layer 130, a first electrode 140, an organic light emitting layer 150, a second electrode 160, and a pixel defining layer 170 will be briefly described with reference to fig. 1. The driving layer 120 includes a TFT (thin film transistor). The organic light emitting layer 150 includes a first sub-pixel 181, a second sub-pixel 182, and a third sub-pixel 183. The first electrode 140 is electrically connected to the lead conductive layer through a via hole provided on the planarization layer 130. An opening is provided on the pixel defining layer 170 at a position corresponding to the organic light emitting layer 150. When the first electrode 140 is driven by the driving layer 120 to obtain a positive voltage, the organic light emitting layer 150 is located between the first electrode 140 and the second electrode 160, and the organic light emitting layer 150 generates visible light due to excitation. The light has different brightness according to the magnitude of the voltage. Depending on the material, for example, the first sub-pixel 181 may be a red sub-pixel, the second sub-pixel 182 may be a blue sub-pixel, and the material of the third sub-pixel 133 may be a green sub-pixel, and the emission layer emits red, green, or blue light.
In an embodiment, referring to fig. 2a, the display panel includes a substrate 210 having a first display area 220 and a second display area 230 adjacent to each other, wherein the first display area 220 and the second display area 230 are both used for displaying a dynamic or static image, and a photosensitive device may be disposed below the first display area 220. The first display region arrangement 220 is provided with a first light emitting structure 240, and the first light emitting structure 240 includes a first pixel defining layer 241 and a first support pillar 242 on the first pixel defining layer 241. The second display region 230 is provided with a second light emitting structure 250, and the second light emitting structure 250 includes a second pixel defining layer 251 and a second supporting column 252 on the second pixel defining layer 251. Wherein, the absolute value of the difference between the height of the first supporting column 242 and the height of the second supporting column 252 is not greater than 1.5 micrometers, taking the plane on which the outer surface of the substrate is located as the height measurement zero point.
Specifically, the substrate has two opposite surfaces, a surface of the substrate facing the ground is defined as an outer surface of the substrate, and surfaces for forming the first and second light emitting structures are defined as inner surfaces of the substrate. In this embodiment, the plane on which the outer surface of the substrate is located is taken as a height measurement zero point, the height of the first support column 242 refers to a distance between the top end of the first support column 242 and the outer surface of the substrate, and the height of the second support column 252 refers to a distance between the top end of the second support column 252 and the outer surface of the substrate.
Illustratively, referring to fig. 2b, the height of the first supporting posts 242 is greater than the height of the second supporting posts 252, and the difference between the heights is not greater than 1.5 μm.
For example, referring to fig. 2c, the height of the first supporting posts 242 is less than that of the second supporting posts 252, and the difference between the heights is not greater than 1.5 μm.
Wherein a photosensitive device may be disposed under the first display region 220. The first display area 220 and the second display area 230 are used to display a still or moving picture. Since the first display area 220 is a transparent display area, when light passes through the display area, the photosensitive device under the first display area 220 can be ensured to work normally. It can be understood that the first display area 220 can normally perform dynamic or static picture display when the photosensitive device does not work, and can be in a non-display state when the photosensitive device works, so as to ensure that the photosensitive device can normally perform light collection through the light emitting structure of the first display area 220. In other embodiments, the light transmittances of the first display area 220 and the second display area 230 may be the same, so that the entire display panel has a better light transmittance uniformity, and the display panel has a better display effect.
Further, the first light emitting junctionThe light transmittance of each structural film layer material of the structure 240 is greater than 90%, and the light transmittance of the first light emitting structure 240 is greater than 70%. The first light emitting structure 240 may be a transparent or transflective light emitting structure. The transparency of the first light emitting structure 240 can be achieved by using materials of each layer having good light transmittance. For example, each structural film layer is made of a material having a light transmittance of greater than 90%, so that the light transmittance of the entire display panel can be greater than 70%. Furthermore, each structural film layer is made of a material with the light transmittance of more than 95%, so that the light transmittance of the display panel is further improved, and even the light transmittance of the whole display panel is over 80%. Specifically, the signal traces may be ITO, IZO, Ag + ITO, Ag + IZO, or the like, and the insulating layer material is preferably SiO2，SiNxAnd Al2O3And the pixel definition layer adopts a high-transparency material. It is to be understood that the transparency of the first light emitting structure 240 may also be achieved by other technical means. When the first light emitting structure 240 is in a working state, the transparent or semi-transparent and semi-reflective type first light emitting structure 240 can normally display a picture, and when the first light emitting structure 240 is in a state with other function requirements, external light can be irradiated to a photosensitive device and the like arranged in the first display area through the first light emitting structure 240.
In this embodiment, in order to avoid the long-term slope of the mask plate that uses when the coating by vaporization pixel, the difference in height between first support column and the second support column is not more than 1.5 microns, has not only reduced the damage of mask plate and has prolonged the life of mask plate, has reduced the technology degree of difficulty in the production process moreover. In addition, when the inclination of the mask plate is large, a color mixing phenomenon is likely to occur when pixels are evaporated. In this embodiment, because the mask plate is placed on highly similar first support column and second support column, the probability that the colour mixture when having reduced the coating by vaporization unusual takes place.
In one embodiment, the first display area is provided with a first display panel, the second display area is provided with a second display panel, the first display panel is a PMOLED display panel, or the first display panel is an AMOLED display panel or an AMOLED-like display panel, and a pixel circuit of the AMOLED-like display panel only includes one switching element; the second display panel is a PMOLED display panel or an AMOLED display panel.
When the first display panel is the PMOLED display panel and the second display panel is the AMOLED display panel, a full screen formed by the PMOLED display panel and the AMOLED display panel is formed. When the first display panel is an AMOLED-like display panel and the second light emitting structure 250 is an AMOLED display panel, a full screen formed by the AMOLED-like display panel and the AMOLED display panel is formed.
For example, referring to fig. 2d, when the first display panel is an AMOLED-like display panel, the AMOLED-like display panel includes a pixel circuit 202 (i.e., a TFT array) disposed on a substrate. A first electrode layer is provided over the pixel circuit 202. The first electrode layer includes a plurality of first electrodes 203. The first electrodes 203 correspond to the pixel circuits 202 one to one. The first electrode 203 here is an anode. The AMOLED-like display panel further includes a pixel defining layer 204 disposed on the first electrode 203. The pixel defining layer 204 has a plurality of openings, and the openings are disposed with organic light emitting layers 205 therein to form a plurality of sub-pixels, wherein the sub-pixels correspond to the first electrodes 203 one by one. A second electrode 206 is disposed above the organic light emitting layer 205, and the second electrode 206 is a cathode, which is a planar electrode, that is, a planar electrode formed of a planar electrode material. The pixel circuit 202 is provided with scan lines, data lines, and TFT switching elements. The scanning lines and the data lines are connected to the TFT switching elements. The scan lines control the switching elements of the TFTs to be turned on and off, and the data lines provide driving currents to the first electrodes 203 to control the sub-pixels to emit light when the pixels are turned on.
Referring to fig. 2e, unlike the pixel circuit of the conventional AMOLED display panel, the pixel circuit 202 only includes the switching device and does not include the storage capacitor, so as to form a capacitor-free structure. In the present embodiment, the pixel circuit 202 includes one switching device. The switching devices are disposed in one-to-one correspondence with the first electrodes 203, i.e., one sub-pixel corresponds to one switching device. The switching device comprises a first terminal 2a, a second terminal 2b and a control terminal 2c, as will be described in detail later. The scan line is connected to the control terminal 2c of the switching device, the data line is connected to the first terminal 2a of the switching device, and the first electrode 203 is connected to the second terminal 2b of the switching device. In the pixel circuit 202, the data line is connected to the first end 2a of the switching element, and the scan line is connected to the control end 2c of the switching element, so that the number of the switching elements in the pixel circuit 202 can be reduced to one, and the load current of the scan line and the load current of the data line can be greatly reduced.
The scan lines in the AMOLED-like display panel control the pixel circuits 202 to be turned on and off, only the switching voltages required by the switching elements in the pixel circuits 202 need to be provided, the current of the Light Emitting Structures (OLEDs) does not need to be input, the load current of the scan lines is greatly reduced, and the scan lines can be made of transparent materials such as ITO. Moreover, when the pixel circuit 202 is turned on, the data line supplies a driving current to the anode to control the sub-pixels to emit light, and the data line only needs to supply the driving current of one sub-pixel at each moment, so that the load of the data line is small. Therefore, the data lines can also be made of transparent materials such as ITO and the like, so that the light transmittance of the display screen is improved. The multiple sub-pixels share the surface electrode (cathode), the current of the sub-pixels in one row at each moment is provided by the whole surface cathode, the requirement on the conductivity of the cathode is greatly reduced, the high-transparency electrode can be adopted, the transparency is improved, the integral consistency of the screen is improved, and the negative photoresist is not needed to separate the cathode.
For example, referring to fig. 2f, the AMOLED display panel includes a first electrode 140 formed on the substrate 210, a second pixel defining layer 251 formed on the first electrode 140, a second supporting pillar 252 formed on the second pixel defining layer 251, and a second electrode 160 formed on the second pixel defining layer 251, the second supporting pillar 252 and the organic light emitting layer 150. The second pixel defining layer 251 serves to isolate the respective light emitting cells. The substrate 210 includes a thin film transistor generally including a buffer layer 211, a semiconductor layer 212 formed on the buffer layer 211, the semiconductor layer including a source region 212a, a drain region 212b, and a channel region 212c between the source region 212a and the drain region 212 b. The thin film transistor further includes a gate insulating layer 213 on the semiconductor layer 212 and a gate electrode 214 on the gate insulating layer 213. The gate electrode 214 includes an interlayer insulating layer 215 thereon, and the source and drain electrodes 216 and 217 are positioned on the interlayer insulating layer 215 and electrically connected to the source and drain regions 212a and 212b through contact holes. The source 216 and drain 217 are covered with a planarization layer 130. It is understood that a passivation layer is further disposed between the interlayer insulating layer 215 and the planarization layer 130, and the disposition of the passivation layer is well known in the art and will not be described herein.
In one embodiment, the absolute value of the difference between the first support post height and the second support post height is no greater than 0.5 microns. Illustratively, the first support post height is greater than the second support post height, and the difference in height between the two is no greater than 0.5 microns. Illustratively, the first support column height is less than the second support column height, and the difference in height between the two is no greater than 0.5 microns. Further, one support column height is equal to the second support column height.
In this embodiment, in order to avoid long-term inclination of the mask plate used during pixel evaporation, the absolute value of the difference between the heights of the first support columns and the second support columns is not greater than 0.5 micrometer, so that damage to the mask plate is reduced, and the service life of the mask plate is prolonged.
In one embodiment, referring to fig. 3, the first light emitting structure 240 further includes a first electrode layer 310, an organic light emitting layer 320, and a second electrode layer 330 stacked on the substrate 210 in the first display region 220. The organic light emitting layer 320 of the first light emitting structure 240 includes a plurality of first light emitting units 321, and a first pixel defining layer 241 disposed between the adjacent first light emitting units 321. With reference to fig. 3, the second light emitting structure 250 includes a first electrode layer 340, an organic light emitting layer 350, and a second electrode layer 360 stacked on the substrate 210 in the second display region 230. The organic light emitting layer 350 of the second light emitting structure 250 includes a plurality of second light emitting units 351, and a second pixel defining layer 251 disposed between the adjacent second light emitting units 351.
The first light emitting unit 321 or the second light emitting unit 351 further includes a first layer group for injecting a first carrier, a light emitting layer formed on the first layer group, and a second layer group formed on the light emitting layer for injecting a second carrier. The first layer group may include a first carrier injection layer, a first carrier transport layer, and a second carrier blocking layer. It is understood that when the first carriers are holes, the second carriers are electrons; when the first carriers are electrons, the second carriers are holes. The light emitting layer refers to an electron and a hole which are recombined to form an exciton when the display panel is driven, thereby generating light emission. The second group of layers may include a second carrier injection layer, may further include a second carrier transport layer, and may also include a first carrier blocking layer. This is well known to those skilled in the art and will not be described in detail here.
With reference to fig. 3, in the first display area 220, the first electrode layer 140 is formed on the substrate 210 of the first display area 220. The second electrode layer 330 covers the first support pillar layer 242 and the first light emitting unit 321. The first display region of the display panel may be a transparent or transflective display panel. The transparency of the display panel can be realized by adopting materials of each layer with better light transmittance. For example, each layer is made of a material having a light transmittance of greater than 90%, so that the light transmittance of the entire display panel can be 70% or more. Furthermore, each structural film layer is made of a material with the light transmittance of more than 95%, so that the light transmittance of the display panel is further improved, and even the light transmittance of the whole display panel is over 80%. Specifically, conductive traces such as a cathode and an anode, etc. may be provided as ITO, IZO, Ag + ITO, or Ag + IZO, etc., and the insulating layer material is preferably SiO2, SiNx, etc. It is understood that the transparency of the first display region of the display panel can also be realized by other technical means, and the structure of the display panel can be applicable. When the first display area of the display panel is in other function demand states, external light can irradiate a photosensitive device and the like arranged below the display panel through the display panel.
With reference to fig. 3, in the second display region 230, the first electrode layer 340 is formed on the substrate 210 of the second display region 230. The first electrode layer 340 may be used as a transparent electrode or a reflective electrode according to a light emitting type of the display panel, such as a top emission type or a bottom emission type. When the first electrode layer 340 is used as a transparent electrode, the first electrode layer 340 may be formed using a transparent conductive material that may have a relatively large work function, such as Indium Tin Oxide (ITO), Zinc Tin Oxide (ZTO), Indium Zinc Oxide (IZO), zinc oxide (ZnOx), tin oxide (SnOx), Gallium Indium Zinc Oxide (GIZO), aluminum-doped zinc oxide (AZO), and the like. These may be used alone or in combination thereof. When the first electrode layer 340 serves as a reflective electrode, the first electrode layer 340 may be formed using a metal, for example, silver (Ag), aluminum (Al), platinum (Pt), gold (Au), chromium (Cr), tungsten (W), molybdenum (Mo), titanium (Ti), palladium (Pd), or the like, or an alloy of these metals.
With reference to fig. 3, the second electrode layer 360 covers the second support pillar layer 252, the second pixel defining layer 251 and the second light emitting unit 351. The second electrode layer 360 may be used as a transparent electrode or a reflective electrode according to the type of the display panel. When the display panel is a top emission type, the second electrode layer 360 is a transparent electrode. When the display panel is a bottom emission type, the second electrode layer 360 is a reflective electrode. The material of the second electrode layer 360 is similar to that of the first electrode layer 340, and is not described herein again.
In one embodiment, when the AMOLED is used in the second display region, the substrate further includes a pixel circuit disposed in the second display region. In order to avoid the color mixing risk during evaporation, the height of the first support column is not larger than that of the first support column.
In one embodiment, the cross-sectional shapes of the first pixel defining layer and the first supporting column are both inverted trapezoids, and the cross-sectional shapes of the second pixel defining layer and the second supporting column are both regular trapezoids along a direction perpendicular to the substrate.
The side edges of the inverted trapezoid may extend inward, and when the second electrode layer 330 of the first display region 220 is formed, the first pixel defining layer 241 of the inverted trapezoid and the first support pillar 242 may partition the second electrode layer 330 to form a second electrode corresponding to each of the first light emitting cells 321. In the second display region 230, the second electrodes corresponding to the second light emitting units 351 in the second display region 230 are arranged in series, that is, are planar electrodes. By the side edges of the regular trapezoid extending gently outwards, when the second electrode layer 360 of the second display area 230 is formed, the second electrode layer 360 may cover the side edges of the second pixel defining layer 251 and the second supporting posts 252, so that the second electrode corresponding to each of the second light emitting units 351 in the second display area 230 is not broken.
In this embodiment, in order to save cost, the second electrode layer of the first display region and the second electrode layer of the second display region are formed in the same process step. The second electrode corresponding to each first light-emitting unit in the first display area is disconnected with the first support column through the inverted trapezoidal first pixel limiting layer, and the second electrode corresponding to each second light-emitting unit in the second display area is continuous with the second support column through the regular trapezoidal second pixel limiting layer.
In one embodiment, in the first display region, the first support pillar and the first pixel defining layer are patterned by exposure, and in order to improve the process accuracy, the first support pillar and the first pixel defining layer are made of a negative photosensitive organic material, and the first pixel defining layer and the first support pillar are made of a transparent material.
In one embodiment, referring to fig. 4, the first display area is a transparent display area. The isolation pillar 410 at the boundary between the first display region and the second display region is used to disconnect the second electrode layer 330 in the first display region 220 from the second electrode layer 360 in the second display region 230.
For example, the isolation pillar 410 may have an inverted trapezoid shape, and the side of the inverted trapezoid shape extends inward, and the isolation pillar 410 may isolate the second electrode layer 330 in the first display area 220 from the second electrode layer 360 in the second display area 230, so as to prevent the second electrode layers corresponding to the first display area and the second display area from being shorted, and enable the display panel to work normally.
In one embodiment, since the first display region uses the inverted trapezoidal first pixel defining layer 241 and the first support pillar 242 to block the second electrode layer 330 to form the second electrode corresponding to each of the first light emitting cells 321, the isolation pillar 410 and the first support pillar 242 are formed in the same process step to reduce the production cost. Also, in order to save costs, the plurality of first light emitting units and the plurality of second light emitting units are formed in the same process step.
In this embodiment, a pattern of the pixel defining layer is formed through a patterning process, first, a first pixel defining layer and an isolation pillar are formed in the first display region, then, a second pixel defining layer of the second display region is formed, and then, a first light emitting unit of the first display region and a second light emitting unit of the second display region are simultaneously formed through a one-time evaporation process. Wherein, the first pixel defining layer of the first display region may adopt a highly transparent material. The second pixel defining layer of the second display region may be silicon oxide (SiOx), silicon nitride (SiNx), hafnium oxide, silicon oxynitride (SiOxNy), aluminum oxide (AlOx), or the like, or a multi-layer film composed of two or three thereof. The material of the light emitting unit may be undoped fluorescent light emitting organic material, or fluorescent material doped organic material composed of fluorescent dopant and host material, or phosphorescent material doped organic material composed of phosphorescent dopant and host material. In order to save the process, the first pixel defining layer of the first display region and the second pixel defining layer of the second display region may be formed in the same process.
In one embodiment, the application further provides a display terminal. The display terminal comprises an equipment body and a display panel in any one of the previous embodiments, wherein the equipment body is provided with a device area, and the display panel covers the equipment body. The device area is located below the first display area, and a photosensitive device for collecting light through the first display area is arranged in the device area.
Fig. 5 is a schematic structural diagram of a display terminal in an embodiment, where the display terminal includes an apparatus body 510 and a display panel 520. The display panel 520 is disposed on the apparatus body 510 and is interconnected with the apparatus body 510. The display panel 520 may be the display panel of any of the embodiments described above, and is used to display a static or dynamic picture.
In one embodiment, the device region is a grooved region and the light sensing device includes a camera and/or a light sensor.
Fig. 6 is a schematic structural diagram of an apparatus body 510 in an embodiment. In this embodiment, the device body 510 may be provided with a slotted zone 511 and a non-slotted zone 512. A light sensing device 530 such as a camera and a light sensor may be disposed in the grooved region 511. At this time, the display panels of the first display area are attached together corresponding to the slotted area 511, so that the above-mentioned light sensing devices 530 such as cameras and optical sensors can perform operations such as collecting external light through the first display area. Since the display panel in the first display region is transparent, the light sensing device 530 on the display terminal can capture an image.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A display panel, comprising:
the display device comprises a substrate, a first display area and a second display area, wherein the first display area and the second display area are adjacent to each other and are used for displaying dynamic or static pictures, and a photosensitive device can be arranged below the first display area;
the first light-emitting structure is arranged in the first display area and comprises a first pixel limiting layer and a first support column positioned on the first pixel limiting layer;
the second light-emitting structure is arranged in the second display area and comprises a second pixel limiting layer and a second supporting column positioned on the second pixel limiting layer;
and taking the plane where the outer surface of the substrate is located as a height measurement zero point, wherein the absolute value of the difference between the height of the first support column and the height of the second support column is not more than 1.5 microns.
2. The display panel according to claim 1, wherein the first display area is provided with a first display panel, the second display area is provided with a second display panel, the first display panel is a PMOLED display panel, or the first display panel is an AMOLED display panel or an AMOLED-like display panel, and a pixel circuit of the AMOLED-like display panel only includes one switching element;
the second display panel is a PMOLED display panel or an AMOLED display panel.
3. The display panel of claim 1, wherein an absolute value of a difference between the first support post height and the second support post height is no greater than 0.5 microns.
4. The display panel of claim 3, wherein the first support column height is equal to the first support column height.
5. The display panel according to claim 3, wherein the substrate further comprises a pixel circuit disposed in the second display region;
the first support column height is not greater than the first support column height.
6. The display panel according to claim 3, wherein the first pixel defining layer and the first support pillar have an inverted trapezoidal cross-sectional shape and the second pixel defining layer and the second support pillar have an upright trapezoidal cross-sectional shape in a direction perpendicular to the substrate.
7. The display panel of claim 6, wherein the first pixel defining layer and the first supporting pillar are made of a light-transmissive material.
8. The display panel according to claim 1, wherein the first display region is a transparent display region;
the display panel further comprises an isolation column arranged at the junction of the first display area and the second display area, and the isolation column is used for insulating a second electrode layer corresponding to the first display area from a second electrode layer corresponding to the second display area.
9. The display panel according to claim 8, wherein the first support pillar is formed in the same process step as the barrier pillar;
the light emitting layer of the first light emitting structure and the light emitting layer of the second light emitting structure are formed in the same evaporation step.
10. A display terminal, comprising:
an apparatus body having a device region;
the display panel according to any one of claims 1 to 9, overlaid on the device body;
the device area is positioned below the first display area, and a photosensitive device for collecting light rays through the first display area is arranged in the device area;
the device region is a slotted region; and the photosensitive device comprises a camera and/or a light sensor.
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| CN110783391B (en) * | 2019-11-05 | 2023-04-25 | 京东方科技集团股份有限公司 | Electronic device, display substrate and manufacturing method thereof |
| CN111525046A (en) * | 2020-05-06 | 2020-08-11 | 云谷（固安）科技有限公司 | Display panel manufacturing method and display panel |
| CN111755622B (en) * | 2020-06-17 | 2021-12-28 | 武汉华星光电半导体显示技术有限公司 | Display panel |
| CN113113456B (en) * | 2021-03-31 | 2022-11-08 | 武汉华星光电半导体显示技术有限公司 | OLED display panel, preparation method thereof and display device |
| CN113345942A (en) * | 2021-05-26 | 2021-09-03 | 武汉华星光电半导体显示技术有限公司 | Display panel and preparation method thereof |
| CN117460312B (en) * | 2023-10-19 | 2024-10-22 | 惠科股份有限公司 | Display panel and display device |
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