阅读说明：本技术 一种液晶显示模组的直下式背光灯板的制作方法 (Method for manufacturing direct type backlight lamp panel of liquid crystal display module ) 是由 郭霄 王立新 于 2021-08-26 设计创作，主要内容包括：本发明公开一种液晶显示模组的直下式背光灯板的制作方法,包括以下步骤：在基板上沉积电极层,并对电极层进行图案化制程；在电极层上依次沉积无机平坦层和金属反射层；对无机平坦层和金属反射层进行图案化制程,形成多个贯穿所述无机平坦层和金属反射层上的公共孔；在所述金属反射层和公共孔内沉积钝化层,对所述钝化层进行图案化制程,在多个所述公共孔内分别形成贯穿所述钝化层的过孔；在钝化层上排布多个LED,并使多个LED分别与电极层连接。本发明所述制作方法制得的直下式背光灯板不仅克服直下式背光灯板制作过程中温度的影响,解决了反射率不均匀导致的异色风险,降低了老化风险,而且增加了反射区域面积,提升了光效利用率。(The invention discloses a method for manufacturing a direct type backlight lamp panel of a liquid crystal display module, which comprises the following steps: depositing an electrode layer on the substrate, and performing a patterning process on the electrode layer; depositing an inorganic flat layer and a metal reflecting layer on the electrode layer in sequence; patterning the inorganic flat layer and the metal reflecting layer to form a plurality of common holes penetrating through the inorganic flat layer and the metal reflecting layer; depositing a passivation layer in the metal reflecting layer and the common holes, carrying out a patterning process on the passivation layer, and respectively forming through holes penetrating through the passivation layer in the common holes; and arranging a plurality of LEDs on the passivation layer, and respectively connecting the LEDs with the electrode layer. The direct type backlight lamp panel manufactured by the manufacturing method not only overcomes the influence of temperature in the manufacturing process of the direct type backlight lamp panel, solves the color difference risk caused by uneven reflectivity, reduces the aging risk, but also increases the area of a reflection area and improves the light efficiency utilization rate.)

1. A method for manufacturing a direct type backlight lamp panel of a liquid crystal display module is characterized by comprising the following steps:

step 1, depositing an electrode layer on a substrate, and performing a patterning process on the electrode layer to form a required pattern structure;

step 2, depositing an inorganic flat layer and a metal reflecting layer on the electrode layer in sequence;

step 3, carrying out patterning process on the inorganic flat layer and the metal reflecting layer to form a plurality of public holes penetrating through the inorganic flat layer and the metal reflecting layer;

step 4, depositing a passivation layer in the metal reflecting layer and the public holes, carrying out a patterning process on the passivation layer, and respectively forming through holes penetrating through the passivation layer in the public holes, wherein the aperture of each through hole is smaller than that of each public hole;

and 5, arranging a plurality of LEDs on the passivation layer, and enabling the plurality of LEDs to be respectively arranged at the plurality of through holes and connected with the electrode layer.

2. The method for manufacturing the direct type backlight lamp panel of the liquid crystal display module according to claim 1, wherein the metal reflecting layer is made of one or more alloys of metal aluminum, metal silver, metal chromium and metal tin.

3. The method for manufacturing a direct type backlight lamp panel of a liquid crystal display module according to claim 2, wherein the thickness of the metal reflective layer is more than or equal to 25 nm.

4. The method for manufacturing the direct type backlight lamp panel of the liquid crystal display module according to claim 1, wherein a convex-concave texture structure is arranged on one side of the metal reflecting layer, which is far away from the substrate.

5. The method for manufacturing the direct type backlight lamp panel of the liquid crystal display module according to claim 4, wherein the side of the cross section of the metal reflecting layer, which is away from the substrate, is in a zigzag shape.

6. The method for manufacturing a direct type backlight lamp panel of a liquid crystal display module according to claim 1, wherein in the step 5, an electrode protection layer is deposited in the via hole, solder paste is coated in the via hole, and the plurality of LEDs are disposed at the via hole and connected to the electrode layer through the solder paste.

7. The method for manufacturing the direct type backlight lamp panel of the liquid crystal display module according to claim 1, further comprising the step 6: and depositing and curing a transparent film layer on the passivation layer, so that the transparent film layer covers the LEDs inside.

8. A method for manufacturing a direct type backlight lamp panel of a liquid crystal display module is characterized by comprising the following steps:

step 1, depositing a metal reflecting layer on a substrate;

step 2, depositing a passivation layer on the metal reflecting layer;

step 3, depositing an electrode layer on the passivation layer, and performing a patterning process on the electrode layer to form a required pattern structure;

and 4, arranging a plurality of LEDs on the electrode layer, and connecting the LEDs with the electrode layer.

9. The method for manufacturing a direct type backlight lamp panel of a liquid crystal display module according to claim 8, wherein the metal reflective layer is made of one or more alloys of metal aluminum, metal silver, metal chromium and metal tin.

10. The method for manufacturing a direct type backlight lamp panel of a liquid crystal display module according to claim 9, wherein the thickness of the metal reflective layer is more than or equal to 25 nm.

Technical Field

The invention relates to the technical field of liquid crystal display modules, in particular to a method for manufacturing a direct type backlight lamp panel of a liquid crystal display module.

Background

With the development of display technology, different kinds of displays are gradually brought into the visual field of people, for example, AMOLED displays have a dominant position in the field of mobile phones due to the characteristics of high color gamut, high contrast and the like, are also regarded as a dominant role in the field of televisions, LED direct displays also show the head in outdoor and commercial displays, but liquid crystal displays still are the mainstream of displays in the fields of mobile phones, tablet computers, notebook computers, monitors, televisions, electronic whiteboards, vehicle-mounted displays, commercial advertising machines and the like due to the advantages of mature processes, high yield, high reliability, high price and the like. The display is used as an important tool for information interaction, people always pursue high-cost-performance display equipment, and the display with low price and high quality is always the first choice of vast users.

The structure of the direct type backlight lamp panel of the existing liquid crystal display module is shown in fig. 1, and comprises a substrate 1a, an electrode layer 2a, a white ink layer 3a, an electrode protection layer 4a, soldering tin 5a, an LED 6a and a transparent layer 7a, wherein the manufacturing process of the existing liquid crystal display module generally comprises the following steps: the manufacturing method comprises the following steps of electrode layer 2a sputtering or electroplating, electrode layer 2a patterning, electrode protection layer 4a deposition, white ink layer 3a manufacturing, solder paste 5a printing, LED 6a transferring, reflow soldering, transparent layer 7a coating and curing, wherein the white ink layer 3a is an organic component, and in the process of reflow soldering the LED 6a on the electrode layer 2a, the reflectance of the white ink layer 3a is easily reduced or the reflectance is unevenly distributed and generates different colors due to higher temperature; as shown in fig. 2, the reserved area of the white ink layer 3a in the bonding region of the LED 6a is large, a region not coated with the white ink layer 3a exists around the LED 6a, and the region not coated with the white ink layer 3a cannot reflect light effectively, which results in a decrease in light utilization rate.

Disclosure of Invention

In order to solve the technical problems, the invention provides a method for manufacturing a direct type backlight lamp panel, which adopts the technical scheme that:

a method for manufacturing a direct type backlight lamp panel of a liquid crystal display module comprises the following steps:

step 1, depositing an electrode layer on a substrate, and performing a patterning process on the electrode layer to form a required pattern structure;

step 2, depositing an inorganic flat layer and a metal reflecting layer on the electrode layer in sequence;

step 3, carrying out patterning process on the inorganic flat layer and the metal reflecting layer to form a plurality of public holes penetrating through the inorganic flat layer and the metal reflecting layer;

step 4, depositing a passivation layer in the metal reflecting layer and the public holes, carrying out a patterning process on the passivation layer, and respectively forming through holes penetrating through the passivation layer in the public holes, wherein the aperture of each through hole is smaller than that of each public hole;

and 5, arranging a plurality of LEDs on the passivation layer, and enabling the plurality of LEDs to be respectively arranged at the plurality of through holes and connected with the electrode layer.

Preferably, the material of the metal reflecting layer is one or more of metal aluminum, metal silver, metal chromium and metal tin.

Preferably, the thickness of the metal reflective layer is 25nm or more.

Preferably, one side of the metal reflecting layer, which is far away from the substrate, is provided with a convex-concave texture structure.

Preferably, a side of the cross section of the metal reflecting layer, which faces away from the substrate, is in a zigzag shape.

Preferably, in step 5, an electrode protection layer is deposited in the via hole, then solder paste is coated in the via hole, and then the plurality of LEDs are disposed at the via hole and connected to the electrode layer through the solder paste.

Preferably, the method further comprises the step 6: and depositing and curing a transparent film layer on the passivation layer, so that the transparent film layer covers the LEDs inside.

The application also provides a manufacturing method of the direct type backlight lamp panel of the liquid crystal display module, which comprises the following steps:

step 1, depositing a metal reflecting layer on a substrate;

step 2, depositing a passivation layer on the metal reflecting layer;

step 3, depositing an electrode layer on the passivation layer, and performing a patterning process on the electrode layer to form a required pattern structure;

and 4, arranging a plurality of LEDs on the electrode layer, and connecting the LEDs with the electrode layer.

Preferably, the material of the metal reflecting layer is one or more of metal aluminum, metal silver, metal chromium and metal tin.

Preferably, the thickness of the metal reflective layer is 25nm or more.

The direct type backlight lamp panel manufactured by the manufacturing method is provided with the metal reflecting layer on the substrate, so that the metal reflecting layer can overcome the influence of temperature in the manufacturing process of the direct type backlight lamp panel, the color difference risk caused by uneven reflectivity is solved, the aging risk is reduced, and the service life of the direct type backlight lamp panel is longer;

the metal emission layer is beneficial to uniform light mixing of a plurality of backlight lamps by arranging the rough surface, the number of the membranes required by the liquid crystal display module is reduced, the cost required by the liquid crystal display module is reduced, and the thickness of the liquid crystal display module is reduced.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings. The detailed description of the present invention is given in detail by the following examples and the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

FIG. 1 is a cross-sectional view of a direct type backlight panel of a conventional LCD module;

FIG. 2 is a top view of a direct type backlight panel of a conventional LCD module;

fig. 3 is a cross-sectional view of a direct type backlight panel manufactured by the manufacturing method according to embodiment 1 of the present invention;

fig. 4 is a schematic structural diagram of a metal reflective layer according to embodiment 1 of the present invention;

fig. 5 is a cross-sectional view of a direct type backlight panel manufactured by the manufacturing method according to embodiment 2 of the present invention.

The specific meanings of the reference numerals are:

1. a substrate; 2. a backlight; 3. an electrode layer; 4. an inorganic planarization layer; 5. a metal reflective layer; 6. a common aperture; 61. a via hole; 7. a passivation layer; 8. a transparent film layer; 9. an electrode protection layer; 10. and (7) solder paste.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention. The invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. Advantages and features of the present invention will become apparent from the following description and from the claims. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.

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.

Example 1

Referring to fig. 3 to 4, embodiment 1 of the present application is provided, and embodiment 1 provides a method for manufacturing a direct type backlight lamp panel of a liquid crystal display module, including the following steps:

step 1, depositing an electrode layer on a substrate, and performing a patterning process on the electrode layer to form a required pattern structure;

step 2, depositing an inorganic flat layer and a metal reflecting layer on the electrode layer in sequence;

step 3, carrying out patterning process on the inorganic flat layer and the metal reflecting layer to form a plurality of public holes penetrating through the inorganic flat layer and the metal reflecting layer;

step 4, depositing a passivation layer in the metal reflecting layer and the public holes, carrying out a patterning process on the passivation layer, and respectively forming a plurality of through holes penetrating through the passivation layer in the public holes, wherein the aperture of each through hole is smaller than that of each public hole;

and 5, arranging a plurality of LEDs on the passivation layer, and enabling the plurality of LEDs to be respectively arranged at the plurality of through holes and connected with the electrode layer.

Referring to fig. 3, what adopt this embodiment preparation directly downward type backlight plate includes base plate 1, just one side of base plate 1 is equipped with electrode layer 3, inorganic flat layer 4 and metal reflection stratum 5 in proper order, just metal reflection stratum 5 is located inorganic flat layer 4 deviates from one side of base plate 1, all be equipped with on inorganic flat layer 4 and the metal reflection stratum 5 with a plurality of 2 assorted public holes 6 of backlight, every the pore wall of public hole 6 and metal reflection stratum 5 deviates from one side of base plate 1 all covers passivation layer 7, every be equipped with respectively in the public hole 6 and run through the via hole 61 of passivation layer 7, it is a plurality of backlight 2 sets up respectively and is corresponding via hole 61 department and with electrode layer 3 is connected.

The substrate 1 is made of a glass substrate or an organic polymer composite (PCB/FPC) substrate;

the material of the electrode layer 3 is one or more of metal copper, metal aluminum, metal molybdenum, metal silver, metal platinum, metal chromium and metal nickel; the electrode layer 3 is deposited on the substrate 1 in a magnetron sputtering or electroplating mode, and is prepared into a required pattern structure through a yellow light process, wherein the thickness of the electrode layer 3 is 0.2-10 mu m;

the inorganic flat layer 4 and the passivation layer 7 are inorganic films such as silicon oxide, silicon nitride or silicon oxynitride deposited by a chemical vapor deposition or magnetron sputtering method, and the thicknesses of the inorganic flat layer 4 and the passivation layer 7 are 0.1-5 μm;

the metal reflecting layer 5 is a metal layer deposited on the inorganic flat layer 4 in a magnetron sputtering or electroplating mode, and the thickness of the metal reflecting layer 5 is more than or equal to 25 nm;

the inorganic flat layer 4 and the metal reflection layer 5 form the common hole 6 through a yellow light process, the passivation layer 7 forms the via hole 61 through a yellow light process, and the aperture of the via hole 61 is smaller than that of the common hole 6.

The direct type backlight lamp panel manufactured by the manufacturing method of the embodiment replaces a white ink layer in the existing direct type backlight lamp panel with the metal reflecting layer 5, and the metal reflecting layer 5 is arranged between the inorganic flat layer 4 and the passivation layer 7 and is separated from the electrode layer 3, so that the metal reflecting layer 5 is prevented from influencing the normal operation of the direct type backlight lamp panel; the reflectivity of the metal reflecting layer 5 is higher than that of white ink, the light efficiency utilization rate is improved, the power consumption of the direct type backlight lamp panel is reduced, meanwhile, the reflectivity of the metal reflecting layer 5 is prevented from being influenced in the reflow soldering process of an LED, the uniformity and the product yield of the reflectivity of the metal reflecting layer 5 are guaranteed, the different color risk of the lamp panel caused by the uneven reflectivity is solved, the aging risk is reduced, and the service life of the direct type backlight lamp panel is prolonged; the metal reflecting layer 5 can cover all the areas except the common hole 6, the metal reflecting layer is closer to the LED, the reflecting area is larger, and the light utilization rate can be further effectively improved.

Specifically, in the step 5, an electrode protection layer is deposited in the via hole, then solder paste is coated in the via hole, and then the plurality of LEDs are arranged at the via hole and connected with the electrode layer through the solder paste.

Further comprising the step 6: and depositing and curing a transparent film layer on the passivation layer, so that the transparent film layer covers the LEDs inside.

The transparent film layer 8 is a transparent adhesive layer made of one or more of pure silica gel, silicon resin and epoxy resin.

Specifically, the metal reflecting layer 5 is made of one or more alloys of metal aluminum, metal silver, metal chromium and metal tin, and the reflectivity of the metal aluminum, the metal silver, the metal chromium and the metal tin is high and can reach over 90%, so that the light efficiency utilization rate is improved.

Preferably, the side of the metal reflective layer 5 facing away from the substrate 1 is a rough surface.

One side of the metal reflecting layer 5, which deviates from the substrate 1, is a rough surface to improve the light mixing effect, the rough surface of the metal reflecting layer 5, which deviates from the substrate 1, can be realized by arranging a convex-concave texture structure, specifically, as shown in fig. 4, one side of the metal reflecting layer 5, which deviates from the substrate 1, is a sawtooth shape, or one side of the metal reflecting layer 5, which deviates from the substrate 1, is a wave shape or other convex-concave texture structure, so that one side of the metal reflecting layer 5, which deviates from the substrate 1, is a rough surface, the light mixing effect of the direct type backlight lamp panel is effectively improved, the number of optical films used is reduced, the cost is reduced, and the thickness of the liquid crystal module is reduced.

Example 2

Referring to fig. 5, embodiment 2 of the present application is provided, and a manufacturing method provided in embodiment 2 includes the following steps:

step 1, depositing a metal reflecting layer on a substrate;

step 2, depositing a passivation layer on the metal reflecting layer;

step 3, depositing an electrode layer on the passivation layer, and performing a patterning process on the electrode layer to form a required pattern structure;

and 4, arranging a plurality of LEDs on the electrode layer, and connecting the LEDs with the electrode layer.

Referring to fig. 5, the direct type backlight lamp panel manufactured by the manufacturing method of this embodiment includes a substrate 1, a metal reflective layer 5 and a passivation layer 7 are sequentially disposed on one side of the substrate 1, the passivation layer 7 is located on one side of the metal reflective layer 5 away from the substrate 1, an electrode layer 3 is disposed on one side of the passivation layer 7 away from the metal reflective layer 5, and a plurality of backlight lamps 2 are disposed on one side of the passivation layer 7 away from the metal reflective layer 5 and connected to the electrode layer 3.

Compared with the embodiment 1, in the embodiment 2, the metal reflective layer 5 is directly deposited on the substrate 1, the metal reflective layer 5 is arranged between the substrate 1 and the passivation layer 7 to separate the electrode layer 3 from the metal reflective layer 5, the metal reflective layer 5 and the inorganic passivation layer 7 can cover the whole lamp panel or an effective light mixing area of the lamp panel, the electrode layer 3 and the LED do not need to be connected through a through hole, and the process is simpler.

Specifically, in the step 4, an electrode protection layer 9 is deposited on the electrode layer 3, and then the Mini-LED is soldered to the electrode layer 3 by reflow soldering through a printed solder paste 10.

In this embodiment, the method further includes step 5: and depositing a transparent film layer 8 on the passivation layer 7, wherein the electrode layer 3 and the backlight 2 are both encapsulated by the transparent film layer 8.

The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner; the present invention may be readily implemented by those of ordinary skill in the art as illustrated in the accompanying drawings and described above; however, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the scope of the invention as defined by the appended claims; meanwhile, any changes, modifications, and evolutions of the equivalent changes of the above embodiments according to the actual techniques of the present invention are still within the protection scope of the technical solution of the present invention.