CN110767683B - Display panel, mask and display terminal - Google Patents
Display panel, mask and display terminal Download PDFInfo
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- CN110767683B CN110767683B CN201811290624.6A CN201811290624A CN110767683B CN 110767683 B CN110767683 B CN 110767683B CN 201811290624 A CN201811290624 A CN 201811290624A CN 110767683 B CN110767683 B CN 110767683B
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/04—Coating on selected surface areas, e.g. using masks
- C23C14/042—Coating on selected surface areas, e.g. using masks using masks
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Abstract
The invention relates to a display panel, a mask and a display terminal. Wherein, the display panel includes: a substrate having a first display region and a second display region; the first display unit is arranged in the first display area; the first display unit comprises a first electrode layer; the second display unit is arranged in the second display area; the second display unit comprises a second electrode layer; and the isolation column is arranged at the joint of the first display area and the second display area and is used for insulating the first electrode layer from the second electrode layer. The display panel has the first display area and the second display area which are used for displaying dynamic or static pictures, and can really realize full-screen display. And an isolation column is arranged between the first display area and the second display area to insulate the first electrode layer of the first display unit from the second electrode layer of the second display unit, so that the first display unit and the second display unit are prevented from interfering with each other.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel, a mask 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.
For conventional electronic devices such as mobile phones, tablet computers, and the like, since devices such as a front camera, an earpiece, an infrared sensor element, and the like need to be integrated, it is necessary to open a slot (notch) or a hole on a display screen to dispose the devices in a slot area or a hole area. However, neither the grooved area nor the perforated area is used for displaying the screen.
Therefore, the conventional electronic devices are not all full-screen in the true sense and cannot display in each area of the whole screen, for example, a picture cannot be displayed in a slotted area or a perforated area.
Disclosure of Invention
Therefore, it is necessary to provide a display panel, a mask and a display terminal that improve the above-mentioned defects, aiming at the problem that the conventional electronic devices cannot be used for a full screen in the true sense and cannot display in each area of the full screen.
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 second display area;
the first display unit is arranged in the first display area; the first display unit comprises two first electrode layers which are oppositely arranged;
the second display unit is arranged in the second display area; the second display unit comprises two second electrode layers which are oppositely arranged;
the isolation column is arranged at the joint of the first display area and the second display area and is used for insulating a first electrode layer far away from the substrate from a second electrode layer far away from the substrate.
The display panel has the first display area and the second display area which are used for displaying dynamic or static pictures, and can really realize full-screen display. And the isolation column is arranged between the first display area and the second display area so as to insulate a first electrode layer of the first display unit, which is far away from the substrate, from a second electrode layer of the second display unit, which is far away from the substrate, thereby avoiding mutual interference of the first display unit and the second display unit.
Optionally, the first display unit is an AMOLED display unit or an AMOLED-like display unit; the second display unit is a PMOLED display unit. In this way, a full-screen composed of the PMOLED display unit and the AMOLED display unit is formed.
Optionally, one of the first electrode layers far from the substrate is a cathode layer of the first display unit, and one of the second electrode layers far from the substrate is a cathode layer of the second display unit. Therefore, the cathode layer of the first display unit and the cathode layer of the second display unit are prevented from being conducted with each other, so that mutual influence is avoided, and normal display is not facilitated.
Optionally, the isolation pillar and the second isolation pillar of the second display unit are prepared by using the same patterning process. Therefore, the isolation column of the display panel and the second isolation column of the second display unit are prepared by the same composition process, the preparation process of the display panel is simplified, and materials are saved.
Optionally, the first display unit further includes a first pixel definition layer, the second display unit further includes a second pixel definition layer, and the first pixel definition layer and the second pixel definition layer are prepared by using the same process step;
the isolation column is arranged on the first pixel definition layer and/or the second pixel definition layer. Therefore, the first pixel definition layer and the second pixel definition layer are prepared by the same process step, the preparation process of the display panel is simplified, and the production efficiency is accelerated.
Optionally, one of the two first electrode layers far from the substrate and one of the two second electrode layers far from the substrate are prepared by using the same process step. Therefore, the corresponding first electrode layer and the corresponding second electrode layer are prepared by the same process step, the preparation process of the display panel is simplified, and the production efficiency is accelerated. In addition, the arrangement of the isolation column between the first display unit and the second display unit enables the corresponding first electrode layer and the second electrode layer to be prepared by the same process step, and the condition that the corresponding first electrode layer is conducted with the corresponding second electrode layer cannot occur.
Optionally, the isolation column is in an inverted trapezoid shape. Therefore, the isolating column with the inverted trapezoid structure can better play a role in isolating the first electrode layer and the second electrode layer.
Optionally, the isolation pillar comprises multiple isolation pillar layers stacked; at least one group of adjacent two isolating column layers form a step;
in the extending direction perpendicular to the isolation column, the width of the bottom surface of the isolation column layer which forms the step and is positioned at the upper layer is larger than the width of the top surface of the isolation column layer which forms the step and is positioned at the lower layer;
the extending direction of the isolation column is parallel to the substrate; the width is the size of the orthographic projection of the isolation column formed on the substrate in the direction perpendicular to the extension direction of the isolation column. Therefore, in the process of forming the first electrode and the second electrode by sputtering from top to bottom, the first electrode and the second electrode are difficult to form on the step formed by the isolation column layer, so that the first electrode and the second electrode are effectively isolated, the first display unit and the second display unit are prevented from interfering with each other, and normal display of a full screen is facilitated.
A mask for use in the preparation of a display panel as described in any one of the above embodiments; the difference between the height of the support column of the first display unit relative to the substrate and the height of the isolation column of the second display unit relative to the substrate is a first height difference; the mask plate comprises:
a frame;
the first mask net unit is fixedly arranged on the frame and used for preparing an organic light-emitting layer of the first display unit;
the second mask net unit is fixedly arranged on the frame and used for preparing an organic light-emitting layer of the second display unit;
and a second height difference is formed between the first mask net unit and the second mask net unit, and the first height difference is equal to the second height difference.
Therefore, by arranging the first mask net unit and the second mask net unit with corresponding height difference, when the mask is used for simultaneously evaporating the organic light emitting layer of the first display unit and the organic light emitting layer of the second display unit, the distance between the first mask net unit and the anode layer of the first display unit (two first electrode layers are close to one first electrode layer of the substrate) can be equal to the distance between the second mask net unit and the anode layer of the second display unit (namely two second electrode layers are close to one second electrode layer of the substrate), so that the shadow effect is reduced, and the evaporation color mixing is avoided.
A display terminal, comprising:
an apparatus body having a device region;
the display panel as described in any one of the above embodiments, which is overlaid on the device body;
the device area is located below the second display area, and a photosensitive device for collecting light through the second display area is arranged in the device area.
According to the display terminal, the isolation column is arranged between the first display area and the second display area so as to insulate the first electrode layer of the first display unit from the second electrode layer of the second display unit, and therefore mutual interference between the first display unit and the second display unit is avoided. And this display terminal has the first display area and the second display area that all show dynamic or static picture, and the sensitization device can see through the second display area and gather light, can really realize full screen display and show.
Drawings
FIG. 1 is a schematic cross-sectional view illustrating a display panel according to an embodiment of the present invention;
FIG. 2 is a front view of the display panel shown in FIG. 1;
FIG. 3 is a schematic cross-sectional view illustrating a display panel according to another embodiment;
FIG. 4 is a schematic cross-sectional view of a mask according to an embodiment of the present invention;
FIG. 5 is a front view of the reticle shown in FIG. 4;
FIG. 6 is a schematic cross-sectional view of a display terminal according to an embodiment of the invention;
fig. 7 is a front view of the display terminal shown in fig. 5.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In describing positional relationships, unless otherwise specified, when an element such as a layer, film or substrate is referred to as being "on" another layer, it can be directly on the other layer or intervening layers may also be present. Further, when a layer is referred to as being "under" another layer, it can be directly under, or one or more intervening layers may also be present. It will also be understood that when a layer is referred to as being "between" two layers, it can be the only layer between the two layers, or one or more intervening layers may also be present.
Where the terms "comprising," "having," and "including" are used herein, another element may be added unless an explicit limitation is used, such as "only," "consisting of … …," etc. Unless mentioned to the contrary, terms in the singular may include the plural and are not to be construed as being one in number.
It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the present invention.
It will also be understood that when interpreting elements, although not explicitly described, the elements are to be interpreted as including a range of errors which are within the acceptable range of deviation of the particular values as determined by those skilled in the art. For example, "about," "approximately," or "substantially" may mean within one or more standard deviations, without limitation.
Furthermore, the drawings are not 1: 1, and the relative dimensions of the various elements in the figures are drawn for illustration only and not necessarily to true scale.
As described in the background art, since the conventional electronic devices such as mobile phones and tablet computers need to integrate the front camera, the headphone, the infrared sensing element, etc., the camera, the headphone, the infrared sensing element, etc. can be disposed in the slotted area by slotting (Notch) on the 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.
In view of the above problems, the technical staff have developed a display panel, which realizes the full-screen display of the electronic device by setting a transparent display panel in a slotted area. The OLED may be classified into a PMOLED (Passive Matrix OLED) and an AMOLED (Active Matrix OLED) according to a driving method. Taking PMOLED as an example, the same property electrode of the same row of display units of the PMOLED display array is shared, and the same property electrode of the same column of display units is also shared. Specifically, the PMOLED display panel is a matrix of cathodes and anodes, pixels in the array are illuminated in a scanning manner, each pixel is operated in a short pulse mode to emit light at an instantaneous high brightness. Research shows that the PMOLED display panel has high light transmittance due to no TFT backplane and no metal wiring, and thus can be applied to the transparent display panel.
Because the display unit arranged in the grooved area is adjacent to the display unit arranged in the non-grooved area, when the cathode layers of the display units in the two areas are formed by sputtering, the moving directions of metal atoms are not fixed, so that the cathode layers of the two areas are easily and mutually conducted, and normal display is not facilitated.
To solve the above problems, the present invention provides a display panel, which can preferably solve the above problems.
Fig. 1 is a schematic cross-sectional view of a display panel according to an embodiment of the present invention. Fig. 2 is a front view of the display panel shown in fig. 1. For the purpose of illustration, the drawings show only the structures associated with embodiments of the invention.
Referring to fig. 1 and 2, a display panel according to an embodiment of the present invention includes a substrate 10, a first display unit 11, a second display unit 12, and an isolation pillar 13. The substrate 10 is provided with a first display area a1 and a second display area a2 which are adjacent to each other, the first display area a1 and the second display area a2 are both used for displaying dynamic or static pictures, and a photosensitive device can be arranged below the second display area a 2. The first display unit 11 is disposed in the first display area a1, and the first display unit 11 includes two first electrode layers 113 disposed opposite to each other. The second display unit 12 is disposed in the second display area a2, and the second display unit 12 includes two second electrode layers 123 disposed oppositely. The spacers 13 are disposed at the connection between the first display region a1 and the second display region a 2. The isolation pillar 13 is used to insulate one of the two first electrode layers 113 away from the substrate from one of the two second electrode layers 123 away from the substrate.
The display panel has the first display area a1 and the second display area a2 which display a moving or still image, and can realize full-screen display. In addition, the isolation pillar 13 is disposed between the first display region a1 and the second display region a2 to insulate one of the two first electrode layers 113 of the first display unit 11, which is far from the substrate 10, from one of the two second electrode layers 123 of the second display unit 12, which is far from the substrate 10, so that mutual interference between the first display unit 11 and the second display unit 12 is avoided, and full-screen display is facilitated.
It should be noted that the first display unit 11 and the second display unit 12 may be formed separately or simultaneously, and are not limited herein.
In an embodiment of the present invention, the substrate 10 may be a rigid substrate 10, such as a transparent substrate, e.g., a glass substrate, a quartz substrate, or a plastic substrate; the substrate 10 may also be a flexible substrate, such as a PI film, to improve the light transmittance of the device.
In some embodiments of the present invention, the second display unit 12 may be a transparent or transflective display unit. For example, in one embodiment, the second display unit 12 is a PMOLED (Passive Matrix OLED, PMOLED, Passive organic electroluminescent diode, also called Passive organic electroluminescent diode) display unit. Because the PMOLED display unit does not have a TFT back plate and metal wiring, the light transmittance is high, and the high light transmittance is met.
Further, the second display unit 12 having high light transmittance can also be realized by using materials of respective layers having good 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 unit is further improved, and even the light transmittance of the whole display unit is over 80%.
Further, conductive traces of the second display unit 12, such as two second electrode layers 123 (i.e., a cathode layer and an anode layer) and an anode layer, may also be provided as ITO, IZO, Ag + ITO, or Ag + IZO, etc. It should be noted that the second electrode layer 123 may have a single-layer structure, and in other embodiments, may also have a multi-layer structure, i.e., a stack of multiple layers of conductive materials. The insulating layer is preferably made of SiO2, SiNx, Al2O3, or the like, and the pixel defining layer is made of a highly transparent material. Thus, the light transmittance of the second display unit 12 can be further improved.
It will be appreciated that the transparency of the second display unit 12 may also be achieved by other technical means, and that the structure of the display unit described above may be applicable. The transparent or semi-transparent and semi-reflective display unit can normally display pictures when in a working state, and when the display unit is in other functional requirement states, external light can penetrate through the display unit to irradiate a photosensitive device and the like arranged below the display unit.
In some embodiments of the present invention, the first display unit 11 is an AMOLED display unit or an AMOLED-like display unit, and the second display unit 12 is a PMOLED display unit, thereby forming a full screen composed of the PMOLED display unit and the AMOLED display unit.
The AMOLED-like display unit is a pixel circuit including only one switching element (i.e., a driving TFT) and having no capacitor structure. The other structures of the AMOLED-like display panel are the same as those of the AMOLED display panel.
It is understood that the AMOLED-like structure is well known to those skilled in the art, and the detailed structure and principle thereof will not be described herein.
Specifically, one of the two first electrode layers 113 away from the substrate 10 is a cathode layer of the first display unit 11, and one of the two second electrode layers 123 away from the substrate 10 is a cathode layer of the second display unit 12. In this way, the cathode layer of the first display unit 11 and the cathode layer of the second display unit 123 are prevented from being conducted to each other, thereby affecting each other and being disadvantageous to normal display.
It can be understood that one of the two second electrode layers 123, which is far from the substrate 10, includes a plurality of second electrodes, the plurality of second electrodes form row electrodes or column electrodes, and the second display unit 12 further includes second isolation pillars for spacing the plurality of second electrodes to prevent the row electrodes or the column electrodes of the second electrodes from being conducted with each other. In one embodiment, the spacers 13 of the display panel and the second spacers of the second display unit 12 are fabricated by the same patterning process. Thus, the isolation column 13 of the display panel and the second isolation column of the second display unit 12 are prepared by the same composition process, so that the preparation process of the display panel is simplified and the material is saved.
In an embodiment, the first display unit 11 further includes a first pixel definition layer, the second display unit 12 further includes a second pixel definition layer, and the first pixel definition layer and the second pixel definition layer are prepared by using the same process step. The isolation pillar 13 is disposed on the first pixel defining layer and/or the second pixel defining layer. Therefore, the first pixel definition layer and the second pixel definition layer are prepared by the same process step, the preparation process of the display panel is simplified, and the production efficiency is accelerated.
It is understood that one first electrode layer 113 of the two first electrode layers 113 is formed on the substrate 10, and the first electrode layer 113 includes a plurality of first electrodes for forming row electrodes or column electrodes. The first pixel defining layer is formed on the substrate 10 and covers at least a portion of the edge of each first electrode of the first electrode layer 113 to form a plurality of pixel defining openings exposing the surface of the first electrode. The first display unit 11 further includes a first organic light emitting layer formed at the pixel defining opening. The other first electrode layer 113 is formed on a side of each first organic light emitting layer away from the substrate 10, and covers the first organic light emitting layers of the first display unit 11 in a full-surface covering manner.
One second electrode layer 123 of the two second electrode layers 123 is formed on the substrate 10, and the second electrode layer 123 includes a plurality of second electrodes for forming column electrodes or row electrodes. The second pixel defining layer is formed on the substrate 10 and covers at least a portion of the edge of each second electrode of the second electrode layer 123 to form a plurality of pixel defining openings exposing the surface of the second electrode. The second display unit further includes a second organic light emitting layer formed at the pixel defining opening. The other second electrode layer 123 is formed on a side of each second organic light emitting layer away from the substrate 10.
In one embodiment, one of the two first electrode layers 113 away from the substrate 10 and one of the two second electrode layers 123 away from the substrate 10 are prepared by the same process step. Thus, the first electrode layer 113 far away from the substrate 10 in the two first electrode layers 113 and the second electrode layer 123 far away from the substrate 10 in the two second electrode layers 123 are prepared by the same process step, so that the preparation process of the display panel is simplified and the production efficiency is improved. In addition, the arrangement of the isolation column 13 between the first display unit 11 and the second display unit 12 enables the first electrode layer 113 and the second electrode layer 123 to be prepared by the same process step, so that the situation that the first electrode layer 113 is communicated with the second electrode layer 123 does not occur, and the full-screen display is facilitated.
In some embodiments, the spacer 13 has an inverted trapezoidal shape. In this way, the isolation pillars 13 having the inverted trapezoid structure can better serve to isolate the first electrode layer 113 from the second electrode layer 123.
Fig. 3 is a schematic cross-sectional view of a display panel according to another embodiment of the present invention.
Referring to fig. 3, in other embodiments, the isolation pillar 13 includes multiple isolation pillar layers stacked together; at least one adjacent pair of the isolation pillar layers is formed with a step 131. For example, in some embodiments, each isolation pillar layer has a bottom surface and a top surface disposed opposite to the bottom surface, and the bottom surface of the isolation pillar 13 layer located on the upper layer protrudes relative to the top surface of the isolation pillar 13 layer located on the lower layer to form the step 131.
It should be noted that, in the manufacturing process of the display panel, the film layers are formed by overlapping one by one, and the film layer formed later is regarded as being located above/on the film layer formed earlier; correspondingly, a previously formed film layer is considered to be "under/under" a subsequently formed film layer. Thus, when a layer is referred to as being "above/over" or "below/under" another layer, it is based on the top and bottom when the layers overlap; correspondingly, the top surface of the isolation pillar 13 layer located at the lower layer refers to the surface of the isolation pillar 13 layer located at the side away from the substrate 10.
Wherein, in the extending direction perpendicular to the isolation pillar 13, the width of the bottom surface of the isolation pillar layer forming the step 131 and located at the upper layer is greater than the width of the top surface of the isolation pillar layer forming the step 131 and located at the lower layer. The extending direction of the isolation pillars 13 is a direction parallel to the substrate 10, that is, the longitudinal direction of the isolation pillars 13, and the width direction thereof is a direction perpendicular to the longitudinal direction, and the width refers to a dimension of a projection formed on the substrate 10 by the isolation pillars 13 in the direction perpendicular to the extending direction.
It is easy to understand that since the isolation pillars 13 have a three-dimensional structure, they may have different widths at different height positions in a cross section perpendicular to the substrate 10 (i.e., a longitudinal cross section). The projection of the top or bottom surface of the isolation stud layer onto the substrate 10 is unique in the dimension perpendicular to the direction of extension. When the width of the bottom surface of the isolation pillar layer, which is stepped and located at the upper layer, is greater than the width of the top surface of the isolation pillar layer, which is stepped and located at the lower layer, the step 131, which is opened downward, may be formed.
In this way, in the process of forming the first electrode 113 and the second electrode 123 by sputtering from top to bottom, the first electrode 113 and the second electrode 123 are difficult to form on the step 131 formed by the isolation pillar layer, so that the first electrode 113 and the second electrode 123 are effectively separated, the first display unit 11 and the second display unit 12 are prevented from interfering with each other, and normal display of a full-screen is facilitated.
As a preferred embodiment, the material of the isolation pillar 13 may be a negative photoresist. In the specific process of manufacturing the isolation pillars 13 having the inverse trapezoid shape, a negative photoresist layer may be first coated on the substrate 10, and then exposed and developed to form the isolation pillars 13 having the inverse trapezoid shape.
In a specific manufacturing process when the isolation pillars 13 include multiple isolation pillar 13 layers stacked, a negative photoresist layer may be first coated on the substrate 10, and then exposure and development are performed while ensuring a small line width of a lower layer, thereby forming the isolation pillar 13 layer in an inverted trapezoid shape on the lower layer. Then coating negative photoresist of the same material on the whole surface of the substrate 10, defining the height of the isolation column 13, and finally increasing the exposure range compared with the first exposure so that the negative photoresist which generates the cross-linking reaction is larger than the isolation column 13 layer positioned at the lower layer.
Therefore, the double-inverted-trapezoid isolation column 13 is formed, the probability of cathode partition is further improved, and compared with the manufacturing process of a regular trapezoid, the manufacturing process is simpler and the cost is lower.
For example, in still other embodiments, two adjacent isolation pillar layers may be in various combinations of shapes such as a regular trapezoid, an inverted trapezoid, or a rectangle, so as to achieve the purpose of forming the step that can block the cathode.
It is also understood that the isolation pillar layer further includes a side surface connected between the top surface and the lower surface, and the contour line of the side surface of the isolation pillar layer may be a straight line or a curved line in a direction perpendicular to the substrate 10 and perpendicular to the extension direction of the isolation pillar 13, which is not limited herein. For example, the contour line of at least one side surface of the isolation pillar layer is non-linear, and the non-linear shape includes at least one of a broken line segment, an arc shape, a semi-circle shape, and a wave shape.
In an embodiment, in order to improve the light transmittance, no polarizer or a thinner polarizer may be disposed in the second display region a2, that is, no polarizer or a thinner polarizer may be disposed in the second display unit 12 of the second display region a 2.
Since the second display unit 12 in the second display area a2 can effectively improve the diffraction phenomenon generated by the external light transmitting through the second display area a2, the transmittance of the light in the second display area a2 can be effectively improved. The light sensor is beneficial to collecting light through the second display area by a following photosensitive device (for example, a camera), so that the distortion of a shot image caused by diffraction is avoided, and meanwhile, the accuracy and the sensitivity of the light sensor for sensing external light can be improved.
Fig. 4 is a schematic cross-sectional structure diagram of a reticle in an embodiment of the present invention. Fig. 5 shows a front view of the reticle shown in fig. 4. For the purpose of illustration, the drawings show only the structures associated with embodiments of the invention.
The display panel comprises a first display unit 11 and a second display unit 12, and because the first display unit 11 and the second display unit 12 have different structures, the difference between the height of a support column on a first pixel definition layer of the first display unit 11 relative to a substrate and the height of a second isolation column on a second pixel definition layer of the second display unit relative to the substrate is a first height difference, so that a large shadow effect is likely to occur when organic light emitting layers of the first display unit 11 and the second display unit 12 are simultaneously evaporated, and evaporation color mixing is caused. For example, the isolation pillars on the pixel definition layer of the PMOLED display unit are generally made of negative photoresist and have an inverted trapezoid shape, and the height of the isolation pillars is generally above 3um when the taper angle specification and the process condition of evaporating the organic light emitting layer are met, while the support pillars of the pixel definition layer of the PMOLED display unit are generally made of positive photoresist and have a positive trapezoid shape, and the height of the support pillars is generally about 1.5um when the taper angle specification and the process condition of evaporating the organic light emitting layer are met. Therefore, it is necessary to provide a mask to solve the above-mentioned problem of color mixing in vapor deposition.
Referring to fig. 4 and 5, based on the display panel, the present invention further provides a mask for manufacturing the display panel. The mask comprises a frame 100, a first mask unit 102 and a second mask unit 104. The first mask unit 102 is fixedly disposed on the frame 100 for preparing an organic light emitting layer of the first display unit 11. The second mask unit 104 is fixedly disposed on the frame 100, and is used for preparing an organic light emitting layer of the second display unit 12. The first mask unit 102 and the second mask unit 104 have a second height difference therebetween, and the first height difference is equal to the second height difference.
In this way, by providing the first mask net unit 102 and the second mask net unit 104 with corresponding height differences, when the organic light emitting layer of the first display unit 11 and the organic light emitting layer of the second display unit 12 are simultaneously evaporated by using a mask, the distance from the first mask net unit 102 to the anode layer of the first display unit 11 (a first electrode layer where the two first electrode layers are close to the substrate) can be equal to the distance from the second mask net unit 104 to the anode layer of the second display unit 12 (i.e. a second electrode layer where the two second electrode layers are close to the substrate), thereby reducing the shadow effect and avoiding the color mixture caused by evaporation.
In one embodiment, the first height difference is no greater than 1.5 microns. By controlling the height difference between the first display unit 11 and the second display unit 12, it is possible to further control and reduce the shadow effect that may occur during the evaporation process using the mask. Preferably, the first height difference is no greater than 0.5 microns. In this way, by controlling the height difference between the first display unit 11 and the second display unit 12 to be not greater than 0.5 micrometers, it is possible to ensure that the shadow effect is small in the process of using a mask for vapor deposition, and avoid vapor deposition color mixing.
Fig. 6 is a schematic structural diagram of a display terminal in an embodiment of the present invention. Fig. 7 shows a schematic structural diagram of the device body 62 in an embodiment of the present invention. For the purpose of illustration, the drawings show only the structures associated with embodiments of the invention.
Referring to fig. 6 and 7, based on the display panel, an embodiment of the invention further provides a display terminal 60.
The display terminal 60 includes an apparatus body 62 and a display panel 64. The display panel 64 is provided on the apparatus body 62, and is connected to the apparatus body 62. The display panel 64 may be the display panel 64 in any of the embodiments described above, and is used for displaying static or dynamic pictures. The device body has a device region. The device region is located below the second display region a2, and the photosensitive device 40 for collecting light passing through the second display region a2 is disposed in the device region.
In this embodiment, the device body 62 may have a slotted zone 622 and a non-slotted zone 624. Photosensitive devices 40 such as cameras and light sensors may be disposed in the grooved region 622. At this time, the second display area a2 of the display panel 64 is attached corresponding to the slotted area so that the above-mentioned photosensitive devices 40 such as cameras and photosensors can perform operations such as collecting external light through the second display area a 2. Because the display unit in the second display area a2 can effectively improve the diffraction phenomenon generated by the external light transmitting the second display area a2, the quality of the image shot by the camera on the display device can be effectively improved, the distortion of the shot image caused by diffraction can be avoided, and the accuracy and the sensitivity of the optical sensor for sensing the external light can be improved.
The display terminal can be a digital device such as a mobile phone, a tablet, a palm computer and an ipod.
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 second display area;
the first display unit is arranged in the first display area; the first display unit comprises two first electrode layers which are oppositely arranged;
the second display unit is arranged in the second display area; the second display unit comprises two second electrode layers which are oppositely arranged;
the isolation column is arranged at the joint of the first display area and the second display area and used for insulating a first electrode layer far away from the substrate and a second electrode layer far away from the substrate.
2. The display panel of claim 1, wherein the first display unit is an AMOLED display unit or an AMOLED-like display unit; the second display unit is a PMOLED display unit.
3. The display panel according to claim 2, wherein one of the two first electrode layers away from the substrate is a cathode layer of the first display unit, and one of the two second electrode layers away from the substrate is a cathode layer of the second display unit.
4. The display panel according to claim 2, wherein the spacers and the second spacers of the second display unit are fabricated by the same patterning process.
5. The display panel according to claim 1, wherein the first display unit further comprises a first pixel defining layer, the second display unit further comprises a second pixel defining layer, and the first pixel defining layer and the second pixel defining layer are prepared by the same process step;
the isolation column is arranged on the first pixel definition layer and/or the second pixel definition layer.
6. The display panel of claim 1, wherein a first electrode layer away from the substrate and a second electrode layer away from the substrate are prepared by the same process step.
7. The display panel according to any one of claims 1 to 6, wherein the barrier ribs have an inverted trapezoidal shape.
8. The display panel according to any one of claims 1 to 6, wherein the barrier pillar comprises a plurality of barrier pillar layers stacked; at least one group of adjacent two isolating column layers form a step;
in the extending direction perpendicular to the isolation column, the width of the bottom surface of the isolation column layer which forms the step and is positioned at the upper layer is larger than the width of the top surface of the isolation column layer which forms the step and is positioned at the lower layer;
the extending direction of the isolation column is parallel to the substrate; the width is the size of the orthographic projection of the isolation column formed on the substrate in the direction perpendicular to the extension direction of the isolation column.
9. A mask for producing the display panel according to any one of claims 1 to 8; the difference between the height of the support column on the first pixel definition layer of the first display unit relative to the substrate and the height of the second isolation column on the second pixel definition layer of the second display unit relative to the substrate is a first height difference; the mask plate comprises:
a frame;
the first mask net unit is fixedly arranged on the frame and used for preparing an organic light-emitting layer of the first display unit;
the second mask net unit is fixedly arranged on the frame and used for preparing an organic light-emitting layer of the second display unit;
and a second height difference is formed between the first mask net unit and the second mask net unit, and the first height difference is equal to the second height difference.
10. A display terminal, comprising:
an apparatus body having a device region;
the display panel according to any one of claims 1 to 8, overlaid on the device body;
the device area is located below the second display area, and a photosensitive device for collecting light through the second display area is arranged in the device area.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811290624.6A CN110767683B (en) | 2018-10-31 | 2018-10-31 | Display panel, mask and display terminal |
| PCT/CN2019/080661 WO2020087858A1 (en) | 2018-10-31 | 2019-03-29 | Display panel, display terminal and mask plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811290624.6A CN110767683B (en) | 2018-10-31 | 2018-10-31 | Display panel, mask and display terminal |
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| CN110767683A CN110767683A (en) | 2020-02-07 |
| CN110767683B true CN110767683B (en) | 2022-04-15 |
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| WO (1) | WO2020087858A1 (en) |
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| CN111312778B (en) * | 2020-02-26 | 2022-10-11 | Oppo广东移动通信有限公司 | Display panel, manufacturing method thereof and electronic equipment |
| CN113793906B (en) * | 2021-08-30 | 2024-03-01 | 南京国兆光电科技有限公司 | Silicon-based active matrix OLED display and manufacturing method thereof |
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| CN110767683A (en) | 2020-02-07 |
| WO2020087858A1 (en) | 2020-05-07 |
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