CN109148528B - Display panel, manufacturing method thereof and mobile terminal - Google Patents
Display panel, manufacturing method thereof and mobile terminal Download PDFInfo
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- CN109148528B CN109148528B CN201810946900.3A CN201810946900A CN109148528B CN 109148528 B CN109148528 B CN 109148528B CN 201810946900 A CN201810946900 A CN 201810946900A CN 109148528 B CN109148528 B CN 109148528B
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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
- H10K59/60—OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes
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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
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/1201—Manufacture or treatment
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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
- H10K59/50—OLEDs integrated with light modulating elements, e.g. with electrochromic elements, photochromic elements or liquid crystal elements
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
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Abstract
The invention discloses a display panel, a manufacturing method thereof and a mobile terminal. The display panel comprises a pixel unit and a light hole, wherein the light hole is arranged in a preset area of the display panel, and the light hole is positioned on at least one side of the pixel unit in the preset area. The invention can enable the image sensor of the mobile terminal to obtain the light of the external environment of the display panel through the display panel.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of display, in particular to a display panel, a manufacturing method of the display panel and a mobile terminal.
[ background of the invention ]
In a conventional mobile terminal, a front camera is generally disposed on a surface of the mobile terminal, and the front camera is located at one side of a display panel, and the front camera directly faces an external environment of the mobile terminal to photograph the external environment.
The front camera arranged on one side of the display panel can influence the screen occupation ratio of the mobile terminal, so that the screen occupation ratio of the mobile terminal cannot be further improved, namely, the corresponding space for arranging the front camera needs to be reserved on the surface of the mobile terminal, and therefore the display panel cannot completely cover the surface of the mobile terminal.
Therefore, a new technical solution is needed to solve the above technical problems.
[ summary of the invention ]
The invention aims to provide a display panel, a manufacturing method thereof and a mobile terminal, which can enable an image sensor of the mobile terminal to acquire light of the external environment of the display panel through the display panel.
In order to solve the problems, the technical scheme of the invention is as follows:
a display panel comprises pixel units and light transmission holes, wherein the light transmission holes are arranged in a preset area of the display panel and are positioned on at least one side of the pixel units in the preset area; the display panel is further provided with a collimating optical tube, the collimating optical tube is located in the planarization layer and the pixel defining layer, the position of the collimating optical tube corresponds to the position of the light hole, and a straight line corresponding to the collimating optical tube is perpendicular to a plane corresponding to the display panel.
In the display panel, a columnar sealed cavity is arranged in the collimating optical tube, and the sealed cavity is filled with nitrogen.
In the above display panel, the pixel defining layer and/or the planarizing layer is made of a light shielding material.
In the above display panel, the display panel further includes a light shielding member provided in a portion other than the light transmitting hole and the pixel unit in the predetermined region.
In the above display panel, the light shielding member is provided on an encapsulation layer of the display panel; or the light shielding component is arranged between any two of a touch device plate, a polarizing plate and a covering plate of the display panel.
In the above display panel, the position of the predetermined region corresponds to the position of a light receiving window of an image sensor combined with the display panel.
A mobile terminal comprises a terminal body, an image sensor and the display panel; the display panel and the terminal main body are combined into a whole in a superposed mode, and the image sensor is arranged between the terminal main body and the display panel; the light receiving window of the image sensor faces the display panel, and the position of the light receiving window corresponds to the position of the predetermined area.
A method of manufacturing a display panel, the method comprising: step A, forming an array substrate, wherein the array substrate comprises a substrate, a buffer layer, a thin film transistor switch, a planarization layer, a pixel definition layer and an anode layer; step B, forming holes in the planarization layer and the parts of the pixel definition layer corresponding to the predetermined area, wherein the holes are positioned on at least one side of the pixel units in the predetermined area; step C, an organic light emitting layer and a cathode layer are sequentially arranged on the anode layer; and D, arranging a packaging layer on the pixel defining layer and the cathode layer to form a collimating optical tube, wherein the collimating optical tube corresponds to the light hole.
In the above method for manufacturing a display panel, after the step D, the method for manufacturing a display panel further includes the steps of: and E, arranging a light shielding member on the packaging layer or between any two of a touch device plate, a polarizing plate and a covering plate of the display panel, wherein the light shielding member is positioned in the predetermined area except for the light transmission holes and the pixel units.
Because the display panel is provided with the light holes which are used for transmitting the light irradiated to the first surface of the display panel and enabling the light to be transmitted out from the second surface of the display panel back to the display panel, therefore, the image sensor attached on the second surface of the display panel can receive the light outside the mobile terminal through the light-transmitting hole, that is, the image sensor disposed on the bottom surface (the second surface) of the display panel can acquire light of the external environment facing the top surface (the first surface) of the display panel through the display panel, thereby generating (photographing) an image, and therefore, there is no need to specially add a photographing window to the image sensor in the display panel, the area corresponding to the shooting window is the display area of the display panel, so that the screen occupation ratio of the mobile terminal is improved.
In order to make the aforementioned and other objects of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
[ description of the drawings ]
Fig. 1 is a schematic diagram of a mobile terminal according to the present invention.
Fig. 2 is a schematic diagram of a first embodiment of a display panel in the mobile terminal shown in fig. 1.
Fig. 3 is a schematic diagram of a second embodiment of a display panel in the mobile terminal shown in fig. 1.
Fig. 4 is a schematic diagram of a third embodiment of a display panel in the mobile terminal shown in fig. 1.
Fig. 5 is a schematic diagram of a method for manufacturing a display panel according to a first embodiment of the invention.
[ detailed description ] embodiments
The word "embodiment" as used herein means an example, instance, or illustration. In addition, the articles "a" and "an" as used in this specification and the appended claims may generally be construed to mean "one or more" unless specified otherwise or clear from context to be directed to a singular form.
Referring to fig. 1, fig. 1 is a schematic diagram of a mobile terminal according to the present invention.
The mobile terminal of the present invention includes a terminal body 101, an image sensor 102 (camera), and a display panel 103.
The display panel 103 and the terminal body 101 are combined into a whole in a superposed manner, and the image sensor 102 is arranged between the terminal body 101 and the display panel 103;
the light receiving window of the image sensor 102 faces the display panel, and the position of the light receiving window corresponds to the position of a predetermined region of the display panel, which is a region where the display panel is combined with the image sensor 102, that is, the predetermined region is a light-transmitting region of the display panel.
The position of the light-transmitting hole 10301 of the display panel 103 corresponds to the position of at least one photosensitive cell in the image sensor 102.
The light-transmitting hole 10301 is used for allowing light emitted toward the display panel 103 to pass through the display panel 103 and enter the photosensitive unit of the image sensor 102.
The display panel 103 of the present invention is suitable for an OLED (Organic Light Emitting Diode display panel).
Referring to fig. 2, fig. 2 is a schematic diagram of a first embodiment of the display panel 103 in the mobile terminal shown in fig. 1.
The display panel 103 of the present embodiment includes an array substrate including a protective film 10302, a substrate 10303, a barrier layer 10304, a buffer layer 10305, a thin film transistor switch 10306, a planarization layer 10309, a pixel definition layer 10313, and an anode layer 10310. The substrate 10303 is disposed on the protective film 10302, the barrier layer 10304 is disposed on the substrate 10303, the buffer layer 10305 is disposed on the barrier layer 10304, the tft switch 10306 is disposed on the buffer layer 10305, the planarization layer 10309 is disposed on the buffer layer 10305 and the tft switch 10306, the pixel definition layer 10313 is disposed on the planarization layer 10309, the anode layer 10310 is disposed on the planarization layer 10309, and the anode layer 10310 is located in a pixel region defined by the pixel definition layer 10313.
The display panel 103 of this embodiment further includes an organic light emitting layer 10311, a cathode layer 10312 and an encapsulation layer, wherein the organic light emitting layer 10311 is disposed on the anode layer 10310, the cathode layer 10312 is disposed on the organic light emitting layer 10311, and the encapsulation layer is disposed on the array substrate and the cathode layer 10312.
The display panel 103 includes a pixel unit and a light hole 10301, the light hole 10301 is disposed in a predetermined area of the display panel, the light hole 10301 is located on at least one side of the pixel unit in the predetermined area, and the light hole 10301 is configured to transmit light emitted toward a first surface of the display panel 103, so that the light is emitted from a second surface of the display panel 103, where the second surface is a surface opposite to the first surface.
The light-transmitting holes 10301 are surrounded by a light-opaque member of the display panel 103, such as a signal line, a gate electrode, a semiconductor member, or the like.
The size and area of the light-transmitting holes 10301 are smaller than or equal to the size and area of the pixel unit.
The diameter of the smallest circumscribed circle of the region corresponding to the light-transmitting hole 10301 is in the range of 0.5 to 20 micrometers. For example, the diameter is 0.5 microns, 1 micron, 1.5 microns, 2 microns, 2.5 microns, 3 microns, 3.5 microns, 4 microns, 4.5 microns, 5 microns, 5.5 microns, 6 microns, 6.5 microns, 7 microns, 7.5 microns, 8 microns, 8.5 microns, 9 microns, 9.5 microns, 10 microns, 10.5 microns, 11 microns, 11.5 microns, 12 microns, 12.5 microns, 13 microns, 13.5 microns, 14 microns, 14.5 microns, 15 microns, 15.5 microns, 16 microns, 16.5 microns, 17 microns, 17.5 microns, 18 microns, 18.5 microns, 19 microns, 19.5 microns, 20 microns.
Preferably, the diameter is 3 microns.
The region corresponding to the light-transmitting hole 10301 covers a region corresponding to at least one photosensitive cell in the image sensor 102 to be combined with the display panel 103.
In this embodiment, the display panel 103 is further provided with a collimating optical tube, the collimating optical tube is located in the planarization layer 10309 and the pixel defining layer 10313, the position of the collimating optical tube corresponds to the position of the light-transmitting hole 10301, a straight line corresponding to the collimating optical tube is perpendicular to a plane corresponding to the display panel 103, and the collimating optical tube is configured to collimate the light rays penetrating through the light-transmitting hole 10301, so as to avoid a ghost phenomenon.
A columnar sealing cavity is arranged in the collimating optical tube, and nitrogen is filled in the sealing cavity.
The sealing chamber in a column shape is located between one of the first insulating layer 10307 and the second insulating layer 10308 of the array substrate and the encapsulation layer of the display panel, that is, two ends of the sealing chamber in a column shape are sealed by one of the first insulating layer 10307 and the second insulating layer 10308 and the encapsulation layer, and the side surface of the sealing chamber in a column shape is wrapped in the planarization layer 10309 and the pixel definition layer 10313.
The collimating optical tube is formed by performing a photo-masking process and an etching process on portions of the pixel defining layer 10313 and the planarization layer 10309 on at least one side of the pixel unit to form holes in the portions of the pixel defining layer 10313 and the planarization layer 10309 on at least one side of the pixel unit, and disposing an encapsulation layer on the pixel defining layer 10313 and the cathode layer 10312 to seal the holes.
The nitrogen is provided in the collimating optical tube by placing the array substrate provided with the holes and the combination of the organic light emitting layer 10311 and the cathode layer 10312 in a sealed space, vacuumizing the sealed space, and inputting nitrogen into the sealed space, so that the combination of the array substrate provided with the holes and the organic light emitting layer 10311 and the cathode layer 10312 is in a nitrogen environment, and then providing an encapsulation layer on the pixel defining layer 10313 and the cathode layer 10312, so that the holes are sealed.
The bottom surface of the collimating optical tube is one of a convex surface (a surface protruding from the outside of the hole into the hole) and a concave surface (a surface protruding from the inside of the hole and the outside of the hole) and is formed by performing laser cutting (engraving and printing) on the inner bottom surface of the hole by using laser before the hole is sealed.
Referring to fig. 3, fig. 3 is a schematic diagram of a second embodiment of the display panel 103 in the mobile terminal shown in fig. 1.
The second embodiment of the display panel 103 of the present invention is similar to the first embodiment described above, except that:
the display panel 103 further includes a light shielding member 10317, and the light shielding member 10317 is disposed in a portion other than the light transmitting holes 10301 and the pixel cells in the predetermined region.
The light shielding member 10317 is used to shield light emitted from the display panel 103 except the light transmitting holes 10301 to the collimating optical tube.
In addition, the light shielding member 10317 is also used to improve the light collecting effect of the collimating optical tube.
The light shielding member 10317 is disposed on the encapsulation layer; or the light shielding member 10317 is disposed between any two of a touch device panel, a polarizer, and a cover panel to be integrated with the display panel 103.
Referring to fig. 4, fig. 4 is a schematic diagram of a third embodiment of the display panel 103 in the mobile terminal shown in fig. 1.
The third embodiment of the display panel 103 of the present invention is similar to the first embodiment or the second embodiment described above, except that:
the pixel defining layer 10313 and/or the planarization layer 10309 covering the sides of the sealed chamber are made of a light shielding material (light opaque material);
the pixel defining layer 10313 and/or the planarizing layer 10309 made of a light blocking material are used to block light emitted from the display panel 103 except for the light transmitting holes 10301 toward the collimating optical tubes.
Referring to fig. 5, fig. 5 is a schematic diagram of a manufacturing method of the display panel 103 according to a first embodiment of the invention.
The manufacturing method of the display panel 103 of the present embodiment includes the steps of:
step a (501), forming an array substrate, wherein the array substrate includes a protective film 10302, a substrate 10303, a barrier layer 10304, a buffer layer 10305, a thin film transistor switch 10306, a planarization layer 10309, a pixel definition layer 10313, and an anode layer 10310;
a step B (502) of forming holes in the pixel definition layer 10313 and the planarization layer 10309 at portions corresponding to the predetermined regions, wherein the holes are located on at least one side of the pixel units in the predetermined regions;
a step C (503) of sequentially providing an organic light emitting layer 10311 and a cathode layer 10312 on the anode layer 10310;
and step D (504), disposing an encapsulation layer on the pixel definition layer 10313 and the cathode layer 10312 to form a collimating optical tube having a cylindrical sealed chamber, the collimating optical tube corresponding to the light-transmitting hole 10301.
The step A comprises the following steps:
step a1 is to provide the substrate 10303 on the protective film 10302.
Step a2 is to provide the barrier layer 10304 on the substrate 10303.
Step a3, disposing the buffer layer 10305 on the barrier layer 10304.
Step a4, disposing the tft switch 10306 on the buffer layer 10305.
Step a5, disposing the planarization layer 10309 on the buffer layer 10305 and the thin film transistor switch 10306.
Step a6, disposing the pixel definition layer 10313 on the planarization layer 10309.
Step a7, disposing the anode layer 10310 on the planarization layer 10309, wherein the anode layer 10310 is located in the pixel region defined by the pixel definition layer 10313.
The step B comprises the following steps:
step b 1, performing a photo-masking process on the pixel definition layer 10313 and the planarization layer 10309 corresponding to the predetermined region.
Step b2, performing an etching process on the portions of the pixel definition layer 10313 and the planarization layer 10309 that have undergone the photo-masking process and correspond to the predetermined regions, so as to form the holes in the portions of the pixel definition layer 10313 and the planarization layer 10309 that correspond to the predetermined regions.
The hole at least penetrates through the pixel definition layer 10313, and the hole penetrates into the planarization layer 10309 (the bottom of the hole is located in the planarization layer 10309). Preferably, the hole penetrates through the pixel definition layer 10313 and the planarization layer 10309.
The encapsulation layer includes a first inorganic material layer 10314, an organic material layer 10315, and a second inorganic material layer 10316, the organic material layer 10315 being sandwiched between the first inorganic material layer 10314 and the second inorganic material layer 10316;
the step D (504) includes:
step d1(5041), disposing the first inorganic material layer 10314 on the pixel defining layer 10313 and the cathode layer 10312 to form a collimating optical tube having a cylindrical sealed chamber. That is, in the step d1, the hole is sealed with the first inorganic material to form the cylindrical collimating optical tube of the sealed chamber.
Step d2(5042), disposing the organic material layer 10315 on the first inorganic material layer 10314.
Step d3(5043), disposing the second inorganic material layer 10316 on the organic material layer 10315.
Before the step D, the method for manufacturing the display panel 103 further includes the steps of:
and E, placing the combination of the array substrate provided with the holes, the organic light-emitting layer 10311 and the cathode layer 10312 in a sealed space.
And F, vacuumizing the sealed space.
And G, inputting nitrogen into the sealed space.
The step D comprises the following steps:
the encapsulation layer is provided on the pixel definition layer 10313 and the cathode layer 10312 in a nitrogen atmosphere to form the collimating optical tube having a columnar sealed chamber filled with nitrogen gas.
After the step B, and before the step C, the method for manufacturing the display panel 103 further includes the steps of:
and step H, carrying out laser cutting (engraving and printing) on the inner bottom surface of the hole by using laser, so that the bottom surface of the collimating optical tube is one of a convex surface (a surface protruding from the outside of the hole to the inside of the hole) and a concave surface (a surface protruding from the inside of the hole to the outside of the hole).
The second embodiment of the manufacturing method of the display panel 103 of the present invention is similar to the first embodiment described above, except that:
after the step D, the method for manufacturing the display panel 103 further includes the steps of:
step I, disposing a light shielding member 10317 on the encapsulation layer or between any two of the touch device board, the polarizer and the cover board of the display panel 103.
Wherein the light shielding member 10317 is located at a portion of the predetermined region other than the light transmitting holes 10301 and the pixel units, the light shielding member 10317 is configured to shield light rays emitted from the portion of the display panel 103 other than the light transmitting holes 10301 to the collimating optical tube, and the light shielding member 10317 is further configured to improve a light collecting effect of the collimating optical tube.
The third embodiment of the manufacturing method of the display panel 103 of the present invention is similar to the first embodiment or the second embodiment described above, except that:
the material of the pixel definition layer 10313 and/or the planarization layer 10309 is a light-shielding material (light-impermeable material).
The step a5 is as follows:
the planarization layer 10309 made of a light-shielding material (light-impermeable material) is provided over the buffer layer 10305 and the thin film transistor switch 10306.
And/or
The step a6 is as follows:
the pixel defining layer 10313 made of a light-shielding material (light-impermeable material) is disposed on the planarization layer 10309.
The pixel defining layer 10313 and/or the planarizing layer 10309 made of a light blocking material are used to block light emitted from the display panel 103 except for the light transmitting holes 10301 toward the collimating optical tubes.
In the mobile terminal of the present invention, since the light-transmitting hole 10301 is disposed in the display panel 103, and the light-transmitting hole 10301 is used for transmitting the light irradiated to the first surface of the display panel 103 and allowing the light to be transmitted out from the second surface opposite to the display panel 103, the image sensor 102 attached to the second surface of the display panel 103 can receive the light outside the mobile terminal through the light-transmitting hole 10301, that is, the image sensor 102 disposed on the bottom surface (the second surface) of the display panel 103 can obtain the light of the external environment facing the top surface (the first surface) of the display panel 103 through the display panel 103 to generate (shoot) an image, and therefore, there is no need to specially add a shooting window for the image sensor 102 in the display panel 103, and the area corresponding to the shooting window will be the display area of the display panel 103, this is advantageous for improving the screen occupation ratio of the mobile terminal.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.
Claims (6)
1. A display panel is characterized by comprising pixel units and light holes, wherein the light holes are arranged in a preset area of the display panel and are positioned on at least one side of the pixel units in the preset area, and the light holes are used for enabling light emitted to the display panel to penetrate through the display panel and enter a photosensitive unit of an image sensor;
the display panel is also provided with a collimating optical tube, the collimating optical tube is positioned in a planarization layer and a pixel defining layer, the pixel defining layer and the planarization layer are made of shading materials and used for shading light rays emitted to the collimating optical tube from the part of the display panel except the light-transmitting hole, the position of the collimating optical tube corresponds to the position of the light-transmitting hole, and a straight line corresponding to the collimating optical tube is perpendicular to a plane corresponding to the display panel;
the display panel further includes a light shielding member disposed in a portion of the predetermined region excluding the light-transmitting hole and the pixel unit, the light shielding member being configured to shield light emitted from the portion of the display panel excluding the light-transmitting hole toward the collimating optical tube.
2. The display panel of claim 1, wherein a cylindrical sealed chamber is disposed within the collimating optical tube, and the sealed chamber is filled with nitrogen gas.
3. The display panel according to claim 1, wherein the light-shielding member is provided on an encapsulation layer of the display panel; or
The light shielding member is disposed between any two of a touch device plate, a polarizing plate, and a cover plate of the display panel.
4. The display panel according to claim 1, wherein the position of the predetermined region corresponds to a position of a light receiving window of an image sensor combined with the display panel.
5. A mobile terminal characterized in that it comprises a terminal body, an image sensor, and a display panel according to any one of claims 1 to 4;
the display panel and the terminal main body are combined into a whole in a superposed mode, and the image sensor is arranged between the terminal main body and the display panel;
the light receiving window of the image sensor faces the display panel, and the position of the light receiving window corresponds to the position of the predetermined area.
6. A method for manufacturing a display panel according to claim 1, comprising the steps of:
step A, forming an array substrate, wherein the array substrate comprises a substrate, a buffer layer, a thin film transistor switch, a planarization layer, a pixel definition layer and an anode layer;
step B, forming a light hole at the part of the planarization layer and the pixel definition layer corresponding to the predetermined area, wherein the light hole is positioned at least one side of the pixel unit in the predetermined area, and the light hole is used for enabling the light emitted to the display panel to penetrate through the display panel and enter a photosensitive unit of the image sensor;
step C, an organic light emitting layer and a cathode layer are sequentially arranged on the anode layer;
step D, arranging a packaging layer on the pixel defining layer and the cathode layer to form a collimating optical tube, wherein the collimating optical tube corresponds to the light-transmitting hole, and the pixel defining layer and the planarization layer are made of light-shielding materials and used for shielding light rays emitted to the collimating optical tube from the part of the display panel except the light-transmitting hole;
and E, arranging a light shielding member on the packaging layer or between any two of a touch device plate, a polarizing plate and a covering plate of the display panel, wherein the light shielding member is positioned at the part except the light transmission hole and the pixel unit in the preset area, and the light shielding member is used for shielding light emitted to the collimating optical tube from the part except the light transmission hole of the display panel.
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