阅读说明：本技术 聚合物、聚合物的制备方法及背光模组 (Polymer, preparation method of polymer and backlight module ) 是由 张志伟 于 2021-01-15 设计创作，主要内容包括：本发明提供一种聚合物、聚合物的制备方法及背光模组,聚合物由白油与苯酚类衍生物发生交联反应而得到,且聚合物的结构式中包括R1基团,R1基团可与-OH基团相结合并形成氢键。当聚合物形成背光模组的增强膜层时,增强膜层具有较好的光线反射率,且增强膜层在高温下具有较好的稳定性,从而有效地提高了显示装置的性能及可靠性。(The invention provides a polymer, a preparation method of the polymer and a backlight module, wherein the polymer is obtained by the cross-linking reaction of white oil and a phenol derivative, the structural formula of the polymer comprises an R1 group, and an R1 group can be combined with an-OH group to form a hydrogen bond. When the polymer forms the reinforced film layer of the backlight module, the reinforced film layer has better light reflectivity, and the reinforced film layer has better stability at high temperature, so that the performance and the reliability of the display device are effectively improved.)

1. A method of preparing a polymer, comprising the steps of:

providing a white oil and a phenol derivative;

mixing the phenol derivatives and the white oil according to the weight percentage of 0.2-50% to obtain a mixed solution;

and stirring the mixed solution under the conditions of constant temperature and constant humidity until the mixed solution is completely reacted and the polymer is formed.

2. The method for producing a polymer according to claim 1, wherein the stirring time of the mixed solution is 3 to 24 hours while the mixed solution is stirred.

3. The polymer is characterized in that the polymer is obtained by the cross-linking reaction of white oil and phenol derivatives, the structural formula of the polymer comprises an R1 group, and the R1 group can be combined with an-OH group and form a hydrogen bond.

4. The polymer of claim 3, wherein the R1 groups include-OH groups, -COOH groups, -H groups₃PO₄Group, -H₃SO₄At least one or more of the groups.

5. The polymer of claim 3, further comprising a group R2 in the formula, wherein the group R2 is an alkyl group.

6. The polymer of claim 5, wherein the number of carbon atoms in the alkyl group is from 1 to 30.

7. The polymer of claim 5, wherein the alkyl group comprises at least one or more of methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, and tert-butyl.

8. The polymer of claim 3, wherein the phenol derivatives comprise at least one or more of epoxy phenol compounds and derivatives of epoxy phenol compounds, epoxy o-diphenol derivatives and o-diphenol derivatives.

9. The polymer of claim 8, wherein the structural formula of the polymer comprises:

r1, R2, R3 are different groups.

10. A backlight module, comprising:

a substrate;

the LED light sources are arranged on the substrate in an array mode; and

the enhancement layer is arranged on the substrate and covers the LED light source;

wherein the material of the enhancement layer is a polymer according to any one of claims 3 to 9, the enhancement layer combines with-OH groups in the substrate and forms hydrogen bonds, and the enhancement layer is configured to reflect light again.

Technical Field

The invention relates to the field of display panel manufacturing, in particular to a polymer, a preparation method of the polymer and a backlight module.

Background

With the continuous improvement of display panel manufacturing technology, higher requirements are put on the performance and quality of display panels.

Compared with the traditional Light Emitting Diode (LED), the mini-LED has a great improvement on the backlight technology of the display panel. In order to improve the performance of the display panel, in the conventional display panel, besides a plurality of mini-LEDs are arranged inside the panel, a high reflective film layer is arranged inside the display panel to further improve the reflectivity of the display panel. At present, the mainstream high-reflection film layer is high-reflection white oil, and the reflectivity of the gap of the display panel is enhanced by arranging the high-reflection white oil, so that the problems of improving the halation around the LED, the black shadow around the LED and the like are solved. However, the high-reflection white oil used in the prior art is prone to have local cracks at a higher temperature or when the display panel is used for a long time, which causes problems of reduced adhesion between the white oil and the glass substrate, and the like, and in the process of preparing the white oil, the internal stress of the white oil is easily increased, which causes peeling between the white oil and the substrate, thereby reducing the service life and reliability of the display panel,

in summary, in the use process of the high-reflection film layer adopted in the conventional display panel, local cracks are likely to occur at a higher temperature or during long-term use of the display panel, so that the reflectivity of the panel is reduced, and the high-reflection film layer is likely to peel off from the substrate, so that the service life of the display panel is further reduced, and the improvement of the comprehensive performance of the display panel is not facilitated. The above technical problems need to be improved.

Disclosure of Invention

The embodiment of the invention provides a polymer, a preparation method of the polymer and a backlight module, which are used for improving the performance of a display panel, so that when the display panel is used under different working conditions, a display device has better stability, and the backlight module in the display panel has better reflectivity to light.

In order to solve the above technical problem, the technical method provided by the embodiment of the present invention is as follows:

in a first aspect of embodiments of the present invention, a method for preparing a polymer is provided, including the steps of:

providing a white oil and a phenol derivative;

mixing the phenol derivatives and the white oil according to the weight percentage of 0.2-50% to obtain a mixed solution;

and stirring the mixed solution under the conditions of constant temperature and constant humidity until the mixed solution is completely reacted and the polymer is formed.

According to an embodiment of the present invention, in the process of stirring the mixed solution, the stirring time of the mixed solution is 3 to 24 hours.

In a second aspect of the embodiments of the present invention, there is provided a polymer, wherein the polymer is obtained by a crosslinking reaction between white oil and a phenol derivative, and the polymer includes a R1 group, and the R1 group can combine with an-OH group and form a hydrogen bond.

According to an embodiment of the invention, the R1 group comprises an-OH group, a-COOH group, a-H group₃PO₄A group and-H₃SO₄A group.

According to an embodiment of the present invention, the polymer further comprises a group R2, and the group R2 is an alkyl group.

According to one embodiment of the invention, the number of carbon atoms in the alkyl group is 1 to 30.

According to an embodiment of the invention, the alkyl group comprises at least one or more of methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl.

According to an embodiment of the present invention, the phenol derivative includes at least one or more of an epoxy phenol compound and a derivative of the epoxy phenol compound, an epoxy o-diphenol derivative, and an o-diphenol derivative.

According to one embodiment of the invention, the polymer has the formula:

r1, R2, R3 are different groups.

According to a third aspect of the embodiments of the present invention, there is also provided a display device including:

a substrate;

the LED light sources are arranged on the substrate in an array mode; and

the enhancement layer is arranged on the substrate and covers the LED light source;

wherein the material of the enhancement layer is a polymer according to any one of claims 3 to 9, the enhancement layer combines with-OH groups in the substrate and forms hydrogen bonds, and the enhancement layer is configured to reflect light again.

In summary, the embodiments of the present invention have the following beneficial effects:

the embodiment of the invention provides a polymer, a preparation method of the polymer and a display device, wherein the polymer in the embodiment of the invention is obtained by the cross-linking reaction of white oil and a phenol derivative, and the polymer also comprises a group R1, when the polymer is coated on a film layer of a display panel and a reinforcing layer is formed, the group R1 in the polymer can be combined with-OH groups in the rest film layers of the display panel and form a hydrogen bond, so that the adhesion between the polymer and the rest film layers is effectively improved, the reinforcing layer formed by the polymer provided in the embodiment of the invention has a better light reflection effect, and the reinforcing layer still has better performance and can not have the problems of local cracking, falling off and the like under the conditions of long-time work and high-temperature work of the display panel.

Drawings

The technical solution and other advantages of the present invention will become apparent from the following detailed description of specific embodiments of the present invention, which is to be read in connection with the accompanying drawings.

FIG. 1 is a schematic diagram of a conventional display device;

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

FIG. 3 is a schematic process flow diagram of a method for preparing a polymer according to an embodiment of the present invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

With the continuous development of display panel manufacturing technology, people have raised higher requirements on the use performance and quality of display devices. In a conventional display device such as a mini-LED, a high-reflection film layer is generally provided to improve the reflectance of the display device.

As shown in fig. 1, fig. 1 is a schematic structural diagram of a conventional display device. The display device includes a lamp panel 100, a high-reflection film layer 101, and an LED lamp 102. Wherein, high anti-rete 101 sets up on lamp plate 100, and a plurality of LED lamps 102 set up on lamp plate 100, and high anti-rete 101 coating is in the region outside LED lamp 102, simultaneously, still reserves clearance region 104 between LED lamp 102 and high anti-rete 101 because of the technology reason. When the LED lamp 102 emits light, the emitted light 2 is reflected by the display panel 103 to reach the high reflection film layer 101, and is reflected again by the high reflection film layer 101. The emitted light 1 is reflected by the display panel 103 and reaches the gap area 104, and the gap area 104 does not act on the light 1 again, so that the reflectivity of the display panel is reduced, and the performance of the panel is affected.

As shown in fig. 2, fig. 2 is a schematic structural diagram of a display device according to an embodiment of the present invention. In a backlight module of a display device, a substrate 200, an enhancement layer 201, a high-reflection film layer 202, and a plurality of LED lamps 203 are disposed.

Specifically, the reinforcing layer 201 is disposed on the substrate base plate 200, and the high-reflection film layer 202 and the plurality of LED lamps 203 are disposed on the reinforcing layer 202.

In the embodiment of the invention, in the preparation process of the backlight module, the LED lamps 203 are light emitting sources of the backlight module, the LED lamps 203 can be arranged on the substrate 200 in an array manner, the gap region 104 is reserved between the LED lamps 203 and the high-reflection film layer 202, and the high-reflection film layer 202 is not arranged in the gap region 104. The size of the gap region 104 can be set according to the actual product requirement to ensure that the display device has the best light emitting effect.

Further, the reinforcing layer 201 in the embodiment of the present invention is coated on the entire substrate 200, and therefore, the reinforcing layer 201 is also included in the gap region 104, and the reinforcing layer 201 is disposed on the light emitting side of the LED lamp 203.

In order to improve the light-emitting rate of the display device, the enhancement layer 201 provided in this embodiment has a good light reflection effect, and the enhancement layer 201 can be combined with an — OH matrix in the material of the substrate 200 to form a hydrogen bond, the formed hydrogen bond further enhances the adhesion property between the substrate 200 and the enhancement layer 201, and the enhancement layer 201 can still be tightly adhered to the substrate 200 under a complex working condition, thereby ensuring the reliability of the display device.

Meanwhile, the enhancement layer 201 provided by the embodiment of the invention has better stability, when the display device works at higher or lower temperature for a long time, the reflection effect of the enhancement layer 201 and the bonding performance between the enhancement layer and the adjacent film layer are better, and the problems of local cracking or falling off and the like can not occur, so that the display device has higher quality.

When the LED lamp 203 emits light, light rays are emitted from a plurality of angles, and in this embodiment, light rays 2 and 3 are taken as an example for explanation.

On light 2 sent by LED lamp 203 reachd display panel 204, partial light can be reflected once more by display panel 204 and reachs on the high anti-rete 202 of membrane layer, because high anti-rete 202 has better reflection effect, consequently, reach light 2 on the high anti-rete 202 of membrane layer and can be reflected once more to effectual light-emitting rate that has improved LED lamp 203 in the backlight unit.

The light emitted from the LED lamp 203 also includes light 3, the emitted light 3 enters the gap region 104 after being reflected by the display panel, and the high-reflection film layer 202 is not present in the gap region 104, so that the light 3 in the gap region 104 cannot be reflected again by the high-reflection film layer 202.

In the embodiment of the present invention, since the reinforcing layer 201 is provided, and the reinforcing layer 201 is coated on the entire substrate 200, the reinforcing layer 201 is also present in the gap region 104. The enhancement layer 201 may further reflect the light 3, so that the light reflected into the gap region 104 is reflected again, thereby effectively improving the reflection light-emitting rate of the light in the display device and improving the display quality of the display device.

The substrate 200 in the embodiment of the present invention may be a plurality of lamp strips, and when a plurality of different lamp strips are spliced, the different lamp strips may be connected through the enhancement layer 201, so that as many LED lamps as possible are disposed in the backlight module of the display panel, thereby improving the backlight effect of the display device.

Further, the reinforcing layer 201 in the embodiment of the present invention is directly prepared from a polymer, and specifically, the polymer is obtained by performing a cross-linking reaction between white oil and a phenol derivative.

The structure of the polymer can be a three-dimensional net structure, and the structural formula of the polymer comprises R1 groups, and as the reinforcing layer 201 is bonded with other film layers, the R1 groups can be combined with-OH groups in other film layer materials to form hydrogen bonds, so that the bonding force between the film layers is effectively improved.

Preferably, the R1 group may include an-OH group, a-CO groupOH group, -H₃PO₄Group, -H₃SO₄The R1 base group can also be other base groups or functional groups, the main function of the R1 is to combine with-OH base groups in other materials and form hydrogen bonds, and the bonding force between the film layers is further enhanced and the performance of the film layers is improved through the connection effect of the hydrogen bonds.

In the structural formula of the polymer, the polymer can also comprise an R2 group, and preferably, an R2 group is an alkyl group. When R2 is an alkyl matrix, it may include at least one or more of methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, and tert-butyl. The R2 group can also include groups having multiple numbers of C atomsAnd the like.

Further, the number of carbon atoms in the alkyl group is 1 to 30. In the embodiment of the disclosure, in order to ensure that the enhancement layer formed by the polymer not only has high reflection performance, but also has strong adhesion effect, and considering factors such as the preparation cost of the polymer, in the embodiment, the number of C atoms in the alkyl group may be selected to be 4, 10, or 15, and when the number of C atoms in the alkyl group is 4, the isobutyl alkyl group may be selected. The particular alkyl group may also be selected according to the needs of the actual product and will not be described in detail herein.

Further, as shown in fig. 3, fig. 3 is a schematic process flow diagram of a preparation method of a polymer according to an embodiment of the present invention. In preparing the polymer, the method comprises the following steps:

s100: providing a white oil and a phenol derivative;

s101: mixing the phenol derivatives and the white oil according to the weight percentage of 0.2-50% to obtain a mixed solution;

s102: and stirring the mixed solution under the conditions of constant temperature and constant humidity until the mixed solution is completely reacted and the polymer is formed.

The polymer in the embodiment of the invention is prepared from white oil and phenol derivatives. During the preparation, white oil and phenol derivative in certain proportion are first provided. Preferably, the phenol derivative and the white oil are mixed in a ratio of 0.2 to 50% by mass, and the phenol derivative may be added to the white oil during mixing.

After the phenol derivative and the white oil are mixed, in order to ensure that the phenol derivative and the white oil are reacted completely, the mixed solution is stirred under the conditions of constant temperature and constant humidity until the mixture is reacted completely, and finally the polymer is formed. When the mixed solution is stirred, the stirring time is 3-24 h.

Further, when the reaction is carried out at normal temperature while stirring the mixed solution, the stirring time may be 12 to 18 hours, preferably 15 hours. At this point, both are already able to react completely.

If the reaction is carried out at a relatively low temperature, for example, at 10 ℃ as the ambient temperature of the reaction, the crosslinking reaction proceeds relatively slowly due to the relatively low temperature, and the stirring time may be 18 to 24 hours, preferably 20 hours, in order to accelerate the reaction. In this case, the mixed solution can be ensured to be sufficiently crosslinked.

And when the reaction environment temperature is higher, the reaction can be completely realized only by stirring for a short time, preferably, the stirring time is 5-10 h, preferably 8 h. In the reaction process, proper stirring time can be selected according to actual reaction conditions to ensure that the phenol derivatives and the white oil are completely reacted.

Meanwhile, when the phenol derivative and the white oil are mixed, if the adhesive property is high and the molecular weight of the polymer is large, the ratio of the phenol derivative to the white oil is ensured to be between 20 and 50 percent, and preferably, the phenol derivative and the white oil are mixed according to the ratio of 40 or 50 percent by mass fraction. After complete reaction, a certain amount of phenol derivatives still exist in the mixed solution, and at the moment, the-OH group in the phenol derivatives can be combined with the-OH group in other membrane layer materials to form a hydrogen bond, so that the adhesive property of the polymer is enhanced.

Preferably, when the phenol derivative and the white oil are mixed, the ratio of the phenol derivative to the white oil is more than 0.2% but less than 20%, and preferably, the phenol derivative and the white oil are mixed according to the ratio of 2% or 5% by mass fraction. At this time, after the complete reaction, the formed polymer not only has better light reflection performance and high temperature resistance, but also has lower manufacturing cost, thereby effectively reducing the production cost of the display device. The above proportion is only an example, and in the actual production process, the proportion can be adjusted according to the requirements of products, so as to ensure that the reinforced layer has better performance when the obtained polymer is used for forming the reinforced layer.

Further, in the embodiment of the present invention, the phenol derivative may include at least one or more of an epoxy phenol compound and a derivative of the epoxy phenol compound, an epoxy o-diphenol derivative, and an o-diphenol derivative.

When the phenol derivative is an epoxy phenol compound and a derivative of the epoxy phenol compound, the epoxy phenol compound and white oil are mixed according to a proportion of 0.2-50%, stirring is carried out for 3-24 hours by using stirring equipment under the conditions of constant temperature and constant humidity, and the polymer provided by the invention is obtained after full mixing.

Specifically, the structural formula of the polymer is as follows:

wherein the R1 groups may include-OH groups, -COOH groups, -H₃PO₄Group, -H₃SO₄One or more of the groups, the R2 group can be an alkyl group, and the alkyl group is an alkyl group having 1-30 carbon atoms.

When the enhancement layer formed by the polymer is bonded with other film layers, such as a passivation layer in a backlight module, an R1 group in the polymer can be combined with an-OH group in the passivation layer to form a hydrogen bond, so that the enhancement layer has high bonding performance, and the enhancement layer is prevented from falling off in the use process of the display device.

Preferably, when the phenol derivative is an epoxy o-diphenol derivative, the epoxy o-diphenol derivative and the white oil are mixed according to a proportion of 0.2% -50%, stirring is carried out for 3-24 hours under the conditions of constant temperature and constant humidity by using stirring equipment, and the polymer provided by the invention is obtained after full mixing.

At this time, the chemical structure of the polymer is:

wherein R1, R2, R3 may be different groups, or R1 and R3 are the same group, and R2 and R1 and R3 are different groups. Specifically, R1 and R3 can be-OH, -COOH, -H₃P04，-H₃SO₄And the like. R2 is an alkyl group having 1 to 30 carbon atoms, which may include methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, and the like, and which may also includeAnd the like.

Preferably, when the phenol derivative is an o-diphenol derivative, the o-diphenol derivative and the white oil are mixed according to a proportion of 0.2% -50%, stirring is carried out for 3-24 hours under the conditions of constant temperature and constant humidity by using stirring equipment, and the polymer provided by the invention is obtained after full mixing.

At this time, the chemical structure of the obtained polymer is:

wherein R1, R2, R3 may be different groups, or R1 and R3 are the same group, and R2 and R1 and R3 are different groups. Specifically, R1 and R3 can be-OH, -COOH, -H₃P04，-H₃SO₄And the like. R2 is an alkyl group having 1 to 30 carbon atoms, which may include methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, and the like, and which may also includeAnd the like.

Further, the chemical structural formula of the polymer obtained in the embodiment of the present invention may also be:

in the embodiment of the invention, the enhancement layer arranged in the backlight module is formed by the polymer, and when the enhancement layer is arranged in the backlight module, the R1 group in the enhancement layer is combined with the-OH group in the passivation layer and forms a hydrogen bond, so that the enhancement layer has higher adhesive property and light reflection property. Meanwhile, the enhancement layer in the embodiment of the invention also has higher stability, and when the display device works for a long time at higher temperature, the enhancement layer does not have the problems of falling off and the like, so that the display device in the embodiment of the invention has higher performance.

Furthermore, an embodiment of the present invention further provides a display panel and a display device, in which the display panel or the display device is internally provided with the enhancement layer, and the material of the enhancement layer is the polymer provided in the embodiment of the present invention, when the display panel or the display device is used at a high temperature or for a long time, the backlight module in the display device still has a high light reflectivity and a high stability, and meanwhile, the quality and the comprehensive performance of the display panel and the display device are high.

The polymer, the preparation method of the polymer and the backlight module provided by the embodiment of the invention are described in detail above, a specific example is applied in the description to explain the principle and the implementation of the invention, and the description of the above embodiment is only used to help understanding the technical scheme and the core idea of the invention; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.