CN214845850U

CN214845850U - Display panel

Info

Publication number: CN214845850U
Application number: CN202121136963.6U
Authority: CN
Inventors: 王磊磊
Original assignee: Chongqing Kangjia Photoelectric Technology Research Institute Co Ltd
Current assignee: Chongqing Kangjia Photoelectric Technology Research Institute Co Ltd
Priority date: 2021-05-25
Filing date: 2021-05-25
Publication date: 2021-11-23
Anticipated expiration: 2031-05-25

Abstract

The utility model discloses a display panel, wherein, the display panel includes backplate, drive array, a plurality of luminescence unit and antireflection film layer, the drive array sets up in one side of the backplate, the drive array includes a plurality of metal wiring; the light emitting unit is arranged on one side of the driving array, which is far away from the back plate, and the light emitting unit is electrically connected with the driving array; the anti-reflection film layer is arranged on one side, far away from the backboard, of at least part of the metal wiring and used for reducing the reflectivity of light rays emitted by the light emitting unit on the surface of the metal wiring. When the display panel is manufactured, the anti-reflection film layer is arranged on the metal wiring to reduce the reflectivity of the back plate and replace a polaroid, so that the thickness of the display panel is reduced, and the development of a display product towards a thinner trend is facilitated.

Description

Display panel

Technical Field

The utility model relates to a display device technical field especially relates to a display panel.

Background

At present, with the generation of display devices, the application of display panels is becoming more and more extensive. A common display panel includes a housing, a lamp panel installed in the housing, and a polarizer, an optical filter, a glass cover plate and other components located on a light emitting side of the lamp panel; the reflectivity of the display panel is always a very interesting technical index of the display technology, the existing display panels rely on the polarizer to control the reflectivity, and the reflectivity of most display panels is controlled below 1%, even below 0.5%.

However, with the development of flat-panel televisions, flat-panel computers and other industries, the light and thin display panel is obviously more popular, and the thickness of the polarizer used in the display panel is generally over 100 micrometers at present, which seriously affects the thickness index of the product and hinders the development of the display product towards the light and thin trend.

Accordingly, the prior art is yet to be improved and developed.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned prior art not enough, an object of the present invention is to provide a display panel, which aims to solve the problem that the polarizer is arranged in the display panel to block the development of the display product towards the trend of being lighter and thinner.

The technical scheme of the utility model as follows:

a display panel comprises a back plate, a driving array, a plurality of light emitting units and an anti-reflection film layer, wherein the driving array is arranged on one side of the back plate and comprises a plurality of metal wires; the light emitting unit is arranged on one side of the driving array, which is far away from the back plate, and the light emitting unit is electrically connected with the driving array; the anti-reflection film layer is arranged on one side, far away from the backboard, of at least part of the metal wiring and used for reducing the reflectivity of light rays emitted by the light emitting unit on the surface of the metal wiring.

The display panel, wherein the anti-reflection film layer comprises a first dielectric layer.

The display panel, wherein the first dielectric layer is one of an aluminum oxide layer, a zirconium oxide layer or a silicon nitride layer.

The display panel, wherein the anti-reflection film layer comprises a second dielectric layer and a first metal layer, the first metal layer is arranged on the metal wiring, and the second dielectric layer is arranged on the first metal layer.

In the display panel, the second dielectric layer is one of a gallium nitride layer, a zirconium oxide layer, a silicon nitride layer and a titanium oxide layer; and/or the first metal layer is one of a tungsten metal layer, a chromium metal layer, a cobalt metal layer and a titanium metal layer.

The display panel, wherein the anti-reflection film layer comprises a third dielectric layer, a fourth dielectric layer and a second metal layer, and the third dielectric layer, the second metal layer and the fourth metal layer are sequentially stacked on the metal wiring.

In the display panel, the third dielectric layer is at least one of a gallium nitride layer, a zirconium oxide layer, a silicon nitride layer and a titanium oxide layer; the fourth dielectric layer is also at least one of a gallium nitride layer, a zirconium oxide layer, a silicon nitride layer and a titanium oxide layer; and/or the second metal layer is at least one of a tungsten metal layer, a chromium metal layer, a cobalt metal layer, a titanium metal layer and a nickel metal layer.

The display panel, wherein the metal wire comprises a plurality of printed circuits, and the printed circuits are arranged on one side of the back plate in a staggered manner; the anti-reflection film layer is arranged on one side, away from the back plate, of the metal routing wire.

The display panel is characterized in that each light-emitting unit is arranged on one side of the driving array away from the back plate at intervals, and a spacing area is arranged between every two adjacent light-emitting units; the metal routing comprises a first metal routing area and a second metal routing area; the vertical projection of the first metal wiring area on the back plate is at least partially overlapped with the vertical projection of the light-emitting unit on the back plate; the vertical projection of the second metal routing area on the back plate is at least partially overlapped with the vertical projection of the spacing area on the back plate; the anti-reflection film layer is arranged on one side, far away from the back plate, of the second metal wiring area.

The display panel, wherein the thickness of the anti-reflection film layer is one quarter of the wavelength of the emergent light of the light-emitting unit.

The utility model discloses a display panel when making, it walks the line to set up many metals on the backplate earlier, constitute the drive array, the drive array is used for switching on the luminescence unit on the backplate, make display panel can luminous display, light can be difficult for avoiding when luminescence unit is luminous can be towards backplate surface irradiation, so in order to prevent metal wiring surface reflection light, set up one deck antireflection thin layer on metal wiring, the antireflection thin layer adopts low refractive index and high refractive index material to form the membrane heap in turn, through rete design and thick control of membrane, utilize interference effect to reduce the reflection of metal wiring surface, thereby reduce the reflectivity, then can save the polaroid when realizing display panel working parameter, reduce the thickness of display panel, make display panel can be arranged in more frivolous display product.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a display panel according to another embodiment of the present invention;

fig. 3 is a schematic structural diagram of a display panel according to another embodiment of the present invention;

fig. 4 is a table diagram showing the relationship between the reflectivity and the illumination wavelength of the metal trace with the first dielectric layer and the metal trace without the first dielectric layer according to an embodiment of the present invention;

fig. 5 is a table diagram showing the relationship between the reflectivity and the illumination wavelength of the metal wires provided with the second dielectric layer and the first metal layer and the metal wires not provided with the second dielectric layer and the first metal layer according to an embodiment of the present invention;

fig. 6 is a table diagram showing the relationship between the reflectivity and the illumination wavelength of the metal wire provided with the third dielectric layer, the fourth dielectric layer and the second metal layer and the metal wire not provided with the third dielectric layer, the fourth dielectric layer and the second metal layer according to an embodiment of the present invention.

10, metal routing; 20. an antireflective film layer; 21. a first dielectric layer; 22. a second dielectric layer; 23. a third dielectric layer; 24. a fourth dielectric layer; 25. a first metal layer; 26. a second metal layer.

Detailed Description

In order to make the technical solution of the present invention better understood, the following figures in the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Displays are already very common in the prior art. In recent years, the application field of Light Emitting Diodes (LEDs) has been greatly expanded, wherein the market with the fastest growth and the most potential is the backlight application of displays, white LEDs have become increasingly popular with the backlight application of small display panels in several years, the display panels in almost all electronic devices are backlit by the LEDs, and recently, white LEDs are more gradually introduced into the backlight application of Mini LED display panels and Micro LED display panels which need higher performance and longer working time.

Besides using the LED lamp panel to emit backlight in the display, the display is also provided with the polaroid, the polaroid and the light emitting surface of the LED lamp panel are arranged in opposite directions, the reflectivity of the display panel can be reduced through the polaroid, the reflectivity of the display panel is controlled below 1 percent, even below 0.5 percent, glare is reduced, accordingly, the whitening of pictures on the display panel is reduced, a better display effect is obtained, and the market competitiveness of products is improved.

However, with the development of society, a thin and light display has become a mainstream trend, and how to obtain a flat panel display with a smaller thickness is a primary issue of researchers; polarizers manufactured in the market at present are generally over 100 micrometers, and inevitably affect the thickness of the display.

Referring to fig. 1, in an embodiment of the present invention, a display panel is disclosed, wherein the display panel includes a back plate (not shown in the drawings), a driving array (not shown in the drawings), a plurality of light emitting units (not shown in the drawings), and an anti-reflective film layer 20, the driving array is disposed on one side of the back plate, and the driving array includes a plurality of metal wires 10; the light emitting unit is arranged on one side of the driving array, which is far away from the back plate, and the light emitting unit is electrically connected with the driving array; the anti-reflection film layer 20 is disposed on at least a portion of the metal trace 10 away from the backplane, and is configured to reduce a reflectivity of light emitted by the light emitting unit on a surface of the metal trace 10.

The utility model discloses a display panel when making, it walks line 10 to set up many metals on the backplate earlier, constitute the drive array, the drive array is used for switching on the luminescence unit on the backplate, make the backplate can give out light, light can be difficult for avoiding when the backplate is luminous can be towards backplate surface irradiation, so in order to prevent metal wiring 10 surface reflection light, set up one deck antireflection thin layer 20 on metal wiring 10, antireflection thin layer 20 adopts low refractive index and high refractive index material to form the membrane heap in turn, through rete design and thick control of membrane, utilize interference effect to reduce the reflection of metal wiring 10 surfaces, thereby reduce the reflectivity, then can save the polaroid when realizing display panel working parameter, reduce the thickness of display panel, make display panel can be used for in more frivolous display product.

Specifically, as another implementation manner of this embodiment, the thickness of the anti-reflection film layer 20 is one quarter of the wavelength of the emergent light of the light emitting unit. The wavelength specifically refers to the wavelength of visible light, that is, the wavelength range is between 400-780nm, for example, human eyes are most sensitive to light with wavelength of 550nm, when the display panel emits light with wavelength of 550nm, the thickness of the anti-reflection film layer 20 is set to be 50-70nm, so that the reflectivity of the display panel can be reduced, if the thickness of the reflection film layer is too large, the overall thickness of the display can be affected, the light and thin product research is hindered, and the use of raw materials is increased, so that the cost is wasted; if the thickness of the reflective layer is too small, the light ray may not have a good reflectance reducing effect due to a short refraction path in the anti-reflective film layer 20, which may affect the industrial parameter level that can be achieved after the display panel is manufactured.

Specifically, as another implementation manner of this embodiment, it is disclosed that the metal trace 10 is a titanium metal layer or an aluminum metal layer. Titanium metal and aluminium metal are all that electric conductivity is good, light, the stable metal of chemical property, can keep stable efficient signal transmission on the backplate when being used as metal to walk the line, can use for a long time moreover.

Specifically, as another implementation manner of this embodiment, it is disclosed that the anti-reflection thin film layer 20 is a chemical vapor deposition layer, a physical vapor deposition layer, or a magnetron sputtering layer. When the anti-reflection film layer 20 is prepared, a film layer with good uniformity and high density can be prepared by using methods such as chemical vapor deposition, physical vapor deposition or magnetron sputtering, so that the anti-reflection film layer 20 can be completely and stably attached to the metal wiring 10 and is not easy to separate.

As shown in fig. 1, as one implementation of the present embodiment, it is disclosed that the antireflection film layer 20 includes a first Media (Media) layer 21. For example, the first dielectric layer 21 is aluminum oxide (Al)₂O₃) Layer, zirconium oxide (ZrO)₂) Layer or silicon nitride (SiN)_x) One of the layers. Al (Al)₂O₃、ZrO₂、SiN_xThe refractive index of substances to light is small, the first dielectric layer 21 is arranged on the metal wiring 10, single-layer dielectric is convenient to deposit, repeated operation is not needed, the structure is simple, the processing steps are few, the minimum operation requirement is low, and the manufacturing time is saved.

According to the design principle of an anti-reflection film, a layer of AR anti-reflection film is prepared on the metal Ti by referring to illumination with the wavelength of 550nmSputtering the film, selecting CVD, PVD or magnetron sputtering process, and selecting Al as the material of the first dielectric layer 21₂O₃、ZrO₂、SiN_xThe thickness is designed according to the common practice in the current industry, and single-layer SiN is adopted_xFor example, the film thickness should be 60-70nm, as shown in FIG. 4, see R-Ti + SiN_xThe corresponding part, which was obtained by simulation, had a reflectivity of approximately: 28.0% of R (550nm) and 26.3% of R (380-780 nm). It is understood that the expression "28.0% of R (550 nm)" means that the reflectance with respect to light having a wavelength of 550nm is 28.0%, the expression "R" means reflection, "550 nm" means light having a wavelength of 550nm, "28.0%" means reflectance with respect to light having a wavelength in parentheses, and the subsequent meanings of similar expressions are presumed with reference to the aforementioned expressions and will not be described again. The reflectivity of the Ti/Al/Ti-based thin film without the anti-reflection thin film layer 20 is R (550nm) 50.1%, R (380-780nm) 50.7% (R-Ti represents the reflectivity of the non-anti-reflection thin film layer 20, R-Ti + SiN_xAs is the reflectivity of the anti-reflective film layer 20).

It is understood that the abscissa of fig. 4 to 6 represents the wavelength of light in nanometers (nm) and the ordinate represents the reflectance, which will not be described in detail later.

As shown in fig. 2, as another implementation manner of this embodiment, it is disclosed that the anti-reflection film layer 20 includes a second dielectric layer 22 and a first metal layer 25, the first metal layer 25 is disposed on the metal trace 10, and the second dielectric layer 22 is disposed on the first metal layer 25. Specifically, the second dielectric layer 22 is one of a gallium nitride layer, a zirconium oxide layer, a silicon nitride layer, and a titanium oxide layer; and/or the first metal layer 25 is one of a tungsten metal layer, a chromium metal layer, a cobalt metal layer and a titanium metal layer.

According to the design principle of the anti-reflection film, an anti-reflection film layer 20 is prepared on the metal Ti substrate, the preparation process can adopt CVD, PVD, magnetron sputtering, atomic layer deposition and other processes, and the optional material of the second medium layer 22 can be GaN or ZrO₂，SiO₂，SiN_x，TiO₂Etc., the first metal layer 25 may be W, Cr, Co, Ti, etc. With ZrO₂ZrO-W-A collocation System as an example₂The thickness is 50-60nm, the thickness W is 5-10nm, and as shown in figure 5, the reflectivity is obtained through simulation: r (550nm) 1.0%, R (380-780nm) 8.1%, and the reflectivity of the Ti-based thin film without the anti-reflective thin film layer 20 is R (550nm) 50.1%, and R (380-780nm) 50.7% (R-Ti is the reflectivity of the non-anti-reflective thin film layer 20, R-Ti + W + ZrO₂Reflectivity after making the anti-reflective film layer 20).

As shown in fig. 3, as another implementation manner of this embodiment, it is disclosed that the anti-reflection film layer 20 includes a third dielectric layer 23, a fourth dielectric layer 24, and a second metal layer 26, and the third dielectric layer 23, the second metal layer 26, and the fourth metal layer are sequentially stacked and disposed on the metal trace 10. Specifically, the third dielectric layer 23 is at least one of a gallium nitride layer, a zirconium oxide layer, a silicon nitride layer, and a titanium oxide layer; the fourth dielectric layer 24 is also at least one of a gallium nitride layer, a zirconium oxide layer, a silicon nitride layer and a titanium oxide layer; and/or the second metal layer 26 is at least one of a tungsten metal layer, a chromium metal layer, a cobalt metal layer, a titanium metal layer and a nickel metal layer.

According to the design principle of the AR anti-reflection film, preparing a layer of AR anti-reflection film on the metal Ti base, wherein the preparation process can select CVD, PVD, magnetron sputtering and atomic layer deposition processes, and the optional materials of the third dielectric layer 23 and the fourth dielectric layer 24 can be GaN and ZrO₂，SiO₂，SiN_x，TiO₂Etc., the metal traces 10 may be W, Cr, Co, Ti, Ni, etc. With SiN_x-5Co-SiO₂Taking the matching system as an example, the SiNx thickness is 50-60nm, the Cr thickness is 5-10nm, the SiO2 thickness is 90-100nm, and as shown in FIG. 6, the reflectivity is obtained through simulation: 0.9% of R (550nm), 3.3% of R (380-780nm), 50.1% of the reflectivity of the Ti-based thin film without the AR film, 50.7% of R (380-780nm) (R-Ti represents the reflectivity of the metal wire serving as the anti-reflection film, and R-Ti + SiN_x+Co+SiO₂The reflectivity of the metal line as a reflective film).

Specifically, as another implementation manner of this embodiment, it is disclosed that the metal trace 10 includes a plurality of printed circuits, and the printed circuits are disposed on one side of the backplane in a staggered manner; the anti-reflection film layer is arranged on one side of the metal wire 10 departing from the back plate. Present display panel tends to the high resolution, and the last luminescence unit quantity of display panel is huge, so supporting needs set up many metal and walk line 10, and crisscross the metal of setting up in order to reduce the length of metal and walk line 10, reduce the total area that metal walked line 10 and occupy on the backplate, convenient manufacturing reduces materials simultaneously.

Specifically, as another implementation manner of this embodiment, it is disclosed that each of the light emitting units is disposed at an interval on one side of the driving array away from the backplane, and a spacer is disposed between two adjacent light emitting units; the metal routing 10 includes a first metal routing area and a second metal routing area; the vertical projection of the first metal wiring area on the back plate is at least partially overlapped with the vertical projection of the light-emitting unit on the back plate; the vertical projection of the second metal routing area on the back plate is at least partially overlapped with the vertical projection of the spacing area on the back plate; the anti-reflection film layer 20 is disposed on a side of the second metal routing area away from the backplane. Because the direct light only irradiates the second metal wiring area when the light-emitting element emits light, and the first metal wiring area is arranged under the light-emitting unit, no light is irradiated, and no reflection problem exists, so that the anti-reflection film layer 20 is only arranged on the second metal wiring area, which is beneficial to reducing raw material waste, and simultaneously, the anti-reflection film layer 20 is prevented from influencing the electric connection between the light-emitting unit and the first metal wiring area. In addition, another embodiment of the present application discloses that the first metal routing area and the second metal routing area may both be provided with the anti-reflection thin film layer 20, and such an arrangement may directly set the anti-reflection thin film layer 20 to completely cover the metal routing 10 when the metal routing 10 is formed on the backplane, without alignment, simplifying the manufacturing steps, improving the manufacturing efficiency, and the specific arrangement mode is not limited herein.

To sum up, the display panel disclosed by the present invention comprises a back plate, a driving array, a plurality of light emitting units and an anti-reflection film layer 20, wherein the driving array is disposed on one side of the back plate and comprises a plurality of metal wires 10; the light emitting unit is arranged on one side of the driving array, which is far away from the back plate, and the light emitting unit is electrically connected with the driving array; the anti-reflection film layer 20 is disposed on at least a portion of the metal trace 10 away from the backplane, and is configured to reduce a reflectivity of light emitted by the light emitting unit on a surface of the metal trace 10. The anti-reflection film layer 20 is prepared on the metal titanium, and the reflected light is effectively reduced by utilizing the interference anti-reflection principle, so that the contrast of the display panel is improved. The reflectivity of the original back plate surface is reduced from about 50% to about 1%, even 0.5%, glare on the display panel can be reduced, and the contrast of a displayed image is improved; moreover, the preparation process of the anti-reflection film layer 20 disclosed by the application is compatible with the manufacturing process of the display panel, the processing can be completed in one processing flow, the processing process is very convenient to improve, meanwhile, the change of a processing production line is less, and the improvement cost is reduced; meanwhile, a polaroid is not used, so that the thickness of the product is reduced, the flexible and foldable potential is improved, the product cost is reduced, and the market competitiveness of the product is improved.

It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A display panel, comprising:

a back plate;

the driving array is arranged on one side of the back plate and comprises a plurality of metal routing wires;

the plurality of light-emitting units are arranged on one side of the driving array, which is far away from the backboard, and the light-emitting units are electrically connected with the driving array; and

and the anti-reflection film layer is arranged on one side of at least part of the metal wiring far away from the back plate and is used for reducing the reflectivity of the light emitted by the light-emitting unit on the surface of the metal wiring.

2. The display panel of claim 1, wherein the anti-reflective film layer comprises a first dielectric layer.

3. The display panel of claim 2, wherein the first dielectric layer is one of an aluminum oxide layer, a zirconium oxide layer, or a silicon nitride layer.

4. The display panel of claim 1, wherein the anti-reflective film layer comprises a second dielectric layer and a first metal layer, the first metal layer is disposed on the metal traces, and the second dielectric layer is disposed on the first metal layer.

5. The display panel according to claim 4, wherein the second dielectric layer is one of a gallium nitride layer, a zirconium oxide layer, a silicon nitride layer, and a titanium oxide layer; and/or the presence of a gas in the gas,

the first metal layer is one of a tungsten metal layer, a chromium metal layer, a cobalt metal layer and a titanium metal layer.

6. The display panel according to claim 1, wherein the antireflection film layer comprises a third dielectric layer, a fourth dielectric layer and a second metal layer, and the third dielectric layer, the second metal layer and the fourth dielectric layer are sequentially stacked on the metal routing line.

7. The display panel according to claim 6, wherein the third dielectric layer is at least one of a gallium nitride layer, a zirconium oxide layer, a silicon nitride layer, and a titanium oxide layer; the fourth dielectric layer is at least one of a gallium nitride layer, a zirconium oxide layer, a silicon nitride layer and a titanium oxide layer; and/or the presence of a gas in the gas,

the second metal layer is at least one of a tungsten metal layer, a chromium metal layer, a cobalt metal layer, a titanium metal layer and a nickel metal layer.

8. The display panel of claim 1, wherein the metal trace comprises a plurality of printed circuits, and the printed circuits are disposed on one side of the back plate in a staggered manner; the anti-reflection film layer is arranged on one side, away from the back plate, of the metal routing wire.

9. The display panel according to any one of claims 1 to 8, wherein each of the light emitting units is disposed at an interval on a side of the driving array away from the backplane, and a spacer is disposed between two adjacent light emitting units;

the metal routing comprises a first metal routing area and a second metal routing area;

wherein a vertical projection of the first metal wiring area on the back plate is at least partially overlapped with a vertical projection of the light-emitting unit on the back plate;

the vertical projection of the second metal routing area on the back plate is at least partially overlapped with the vertical projection of the spacing area on the back plate;

the anti-reflection film layer is arranged on one side, far away from the back plate, of the second metal wiring area.

10. The display panel according to any one of claims 1 to 8, wherein the thickness of the antireflection film layer is one quarter of the wavelength of the outgoing light of the light emitting unit.