DISPLAY PANEL AND MANUFACTURING METHOD FOR DISPLAY PANEL

Abstract

A manufacturing method for a display panel that includes the following steps: a first substrate manufacturing step, a second substrate manufacturing step, an assembling step, and a first alignment film layer manufacturing step. The display panel includes a first substrate, a second substrate, a liquid crystal layer, and a sealant layer. The manufacturing method for the display panel disposes a first liquid crystal alignment monomer layer on a surface of a common electrode layer, and uses a heat gun to perform heat and light treatment to a color filter substrate to make a link reaction occur between the first liquid crystal alignment monomer layer and the common electrode layer and form a first alignment film layer, and thereby undesirable alignment is improved and greyscale difference of a display panel caused by undesirable alignment is avoided to ensure yields and quality of products.

Claims

1. A manufacturing method for a display panel comprising the following steps: a first substrate manufacturing step, dispensing a sealant layer on a lower surface of a first substrate; a second substrate manufacturing step, coating a liquid crystal layer on an upper surface of a second substrate; an assembling step, correspondingly assembling and laminating the first substrate and the second substrate; and a first alignment film layer manufacturing step, performing heat and light treatment to the first substrate to form a first alignment film layer; wherein the first substrate manufacturing step comprises the following steps: a first underlying layer disposing step, disposing a first underlying layer; a common electrode layer manufacturing step, manufacturing a common electrode layer on an upper surface of the first underlying layer; and a first liquid crystal alignment monomer layer coating step, coating a liquid crystal alignment monomer material on an upper surface of the common electrode layer to form a first liquid crystal alignment monomer layer; wherein performing heat and light treatment to the first substrate will make a link reaction occur between the common electrode layer and the first liquid crystal alignment monomer layer and form the first alignment film layer.

2. The manufacturing method of a display panel as claimed in claim 1, wherein in the first liquid crystal alignment monomer layer coating step, methods of coating include any one of spin coating, inkjet printing, slot die coating, and nanoimprint lithography.

3. The manufacturing method of a display panel as claimed in claim 1, wherein in the first alignment film layer manufacturing step, a heat gun is used to heat the first substrate and UV rays are used to perform light treatment to the first substrate.

4. The manufacturing method of a display panel as claimed in claim 1, wherein the second substrate manufacturing step comprises the following steps: a second underlying layer disposing step, disposing a second underlying layer; a pixel electrode layer manufacturing step, manufacturing a pixel electrode layer on an upper surface of the second underlying layer; a second alignment film layer manufacturing step, manufacturing a second alignment film layer on an upper surface of the pixel electrode layer; and a second liquid crystal alignment monomer layer coating step, coating a second liquid crystal alignment monomer layer on an upper surface of the second alignment film layer.

5. The manufacturing method of a display panel as claimed in claim 4, wherein in the second alignment film layer manufacturing step, a layer of polyimide is coated on the upper surface of the second underlying layer to form the second alignment film layer.

6. The manufacturing method of a display panel as claimed in claim 4, wherein in the second liquid crystal alignment monomer layer coating step, a liquid crystal alignment monomer material is coated on the upper surface of the second alignment film layer to form the second liquid crystal alignment monomer layer.

7. A display panel comprising: a first substrate; a second substrate disposed facing the first substrate; a liquid crystal layer disposed between the first substrate and the second substrate; and a sealant layer disposed between the first substrate and the second substrate, and surrounding the liquid crystal layer; wherein the first substrate comprises: a first underlying layer; a common electrode layer disposed on one side surface of the first underlying layer; and a first liquid crystal alignment monomer layer disposed on one side surface of the common electrode layer distant from the first underlying layer; wherein the first liquid crystal alignment monomer layer occurs a link reaction with the common electrode layer to form a first alignment film layer.

8. The display panel as claimed in claim 7, wherein the second substrate comprises: a second underlying layer; a pixel electrode layer disposed on one side surface of the second underlying layer; a second alignment film layer disposed on one side surface of the pixel electrode layer distant from the second underlying layer; and a second liquid crystal alignment monomer layer disposed on one side surface of the second alignment film layer distant from the pixel electrode layer.

9. The display panel as claimed in claim 8, wherein the second alignment film layer is made of polyimide.

10. The display panel as claimed in claim 7, wherein the first substrate is a color filter substrate, and the second substrate is an array substrate.

Description

DESCRIPTION OF DRAWINGS

[0019] The accompanying figures to be used in the description of embodiments of the present invention or prior art will be described in brief to more clearly illustrate the technical solutions of the embodiments or the prior art. The accompanying figures described below are only part of the embodiments of the present invention, from which figures those skilled in the art can derive further figures without making any inventive efforts.

[0020] FIG. 1 is a flowchart of a manufacturing method for a display panel according to the present invention.

[0021] FIG. 2 is a flowchart of a first substrate manufacturing step according to the present invention.

[0022] FIG. 3 is a flowchart of a second substrate manufacturing step according to the present invention.

[0023] FIG. 4 is a structural schematic diagram of a display panel according to the present invention.

[0024]

TABLE-US-00001 Description of reference numerals: 1: first substrate 2: second substrate 3: liquid crystal layer 4: sealant layer 11: first underlying layer 12: common electrode layer 13: first alignment film layer 14: first liquid crystal alignment monomer layer 21: second underlying layer 22: pixel electrode layer 23: second alignment film layer 24: second liquid crystal alignment monomer layer 100: heat gun

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

[0025] The embodiments of the present invention are described in detail hereinafter. Examples of the described embodiments are given in the accompanying drawings. It should be noted that, the following embodiments are intended to illustrate and interpret the present invention, which shall not be construed as causing limitations to the present invention. Similarly, the following embodiments are part of the embodiments of the present invention and are not the whole embodiments, and all other embodiments those skilled in the art obtain without making any inventive efforts are within the scope protected by the present invention.

[0026] Terms such as “first”, “second”, etc. (if they exist) in the specification, claim and above-mentioned drawings of the present invention are used herein for purposes of description and are not intended to indicate or imply relative order or significance. It should be understood that elements described by such terms can be switched under proper conditions. Besides, terms such as “include”, “comprise” and any their variations are intended for a non-exclusive meaning.

[0027] As shown in FIG. 1, the present embodiment provides a manufacturing method for a display panel including the following steps S1-S4.

[0028] S51, a first substrate manufacturing step, dispensing a sealant layer on an upper surface of a first substrate, wherein the first substrate is a color filter substrate. As shown in FIG. 2, the first substrate manufacturing step S1 includes the following steps S11-S13. S11, an underlying layer disposing step, disposing a first underlying layer. Making a black matrix and a color resist on the first underlying layer to form a color filter substrate. S12, a common electrode layer manufacturing step, manufacturing a common electrode layer on an upper surface of the first underlying layer. S13, a first liquid crystal alignment monomer layer coating step, coating a liquid crystal alignment monomer material on an upper surface of the common electrode layer to form a first liquid crystal alignment monomer layer. The methods of coating include any one of spin coating, inkjet printing, slot die coating, and nanoimprint lithography.

[0029] S2, a second substrate manufacturing step, coating a liquid crystal layer on an upper surface of a second substrate, wherein the second substrate is an array substrate. As shown in FIG. 3, the second substrate manufacturing step S2 includes the following steps S21-S24. S21, a second underlying layer disposing step, disposing a second underlying layer. Making scan lines, thin film field-effect transistors, and data lines on the second underlying layer to form an array substrate. S22, a pixel electrode layer manufacturing step, manufacturing a pixel electrode layer on an upper surface of the second underlying layer. S23, a second alignment film layer manufacturing step, manufacturing a second alignment film layer on an upper surface of the pixel electrode layer. In particular, coating a layer of polyimide on the upper surface of the second underlying layer to form the second alignment film layer. S24, a second liquid crystal alignment monomer layer coating step, coating a second liquid crystal alignment monomer layer on an upper surface of the second alignment film layer. In particular, coating a liquid crystal alignment monomer material on the upper surface of the second alignment film layer to form the second liquid crystal alignment monomer layer. The methods of coating include any one of spin coating, inkjet printing, slot die coating, and nanoimprint lithography.

[0030] S3, an assembling step, correspondingly assembling and laminating the first substrate and the second substrate.

[0031] S4, a first alignment film layer manufacturing step, performing heat and light treatment to the first substrate to form a first alignment film layer.

[0032] In the present embodiment, the order of the first substrate manufacturing step and the second substrate manufacturing step can be switched or performed simultaneously.

[0033] Under the condition of applying voltage, using a heat gun and UV rays to perform heat and light treatment to the first substrate to make a link reaction occur between the common electrode layer and the first liquid crystal alignment monomer layer and form a first alignment film layer, and using the first alignment film layer to orient liquid crystal molecules of the liquid crystal layer regularly, affecting the display effect of a display panel.

[0034] In particular, reactive monomer (RM) of the first liquid crystal alignment monomer layer gathers toward the common electrode layer when heated, making a link reaction occur between the liquid crystal alignment monomer layer and the common electrode layer under the effect of UV rays to form the alignment film layer.

[0035] In the present embodiment, a vertical electric field that drives the liquid crystal molecules to rotate is generated between the pixel electrode layer and the common electrode layer, and the heat gun is used to heat the first substrate. On the one hand, a polyimide layer disposed in a color filter substrate of the conventional technology can be removed to eliminate a polyimide coating process, and a rubbing process to avoid defects such as electrostatic charge, dust and abrasion introduced by an alignment film formed through rubbing. On the other hand, during the course of alignment, by using the heat gun to heat the second substrate, the liquid crystal molecules of the liquid crystal layer can be aligned uniformly to overcome the technical problem of undesirable alignment of the conventional technology, increasing yields and competitiveness of products.

[0036] Besides, during the course of alignment, because a second liquid crystal alignment monomer layer is disposed between the liquid crystal layer and the second substrate, under the condition of applying voltage, the liquid crystal monomer molecules of the second liquid crystal alignment monomer layer will gather toward the second alignment film layer and orient the liquid crystal molecules of the liquid crystal layer regularly, which therefore affects the display effect of the display panel.

[0037] As shown in FIG. 4, the present embodiment further provides a display panel including a first substrate 1, a second substrate 2, a liquid crystal layer 3, and a sealant layer 4. Wherein, the first substrate 1 is a color filter (CF) substrate, the second substrate 2 is a thin film transistor (TFT) array substrate, and the first substrate 1 and the second substrate 2 are disposed facing one another. The liquid crystal layer 3 is disposed between the first substrate 1 and the second substrate 2, and the sealant layer 4 is disposed between the first substrate 1 and the second substrate 2 and surrounds the liquid crystal layer 3.

[0038] In particular, the first substrate 1 includes a first underlying layer 11, a common electrode layer 12, a first liquid crystal alignment monomer layer 13, and a first alignment film layer 14.

[0039] The common electrode layer 12 is disposed on an upper surface of the first underlying layer 11, and the first liquid crystal alignment monomer layer 13 is disposed on an upper surface of the common electrode layer 12. Under the condition of applying voltage and ultraviolet rays (UV), using a heat gun 100 to heat the second substrate 2 will make a link reaction occur between the first liquid crystal alignment monomer layer 13 and the common electrode layer 12 and form the first alignment film layer 14.

[0040] The second substrate 2 includes a second underlying layer 21, a pixel electrode layer 22, a second alignment film layer 23, and a second liquid crystal alignment monomer layer 24.

[0041] The pixel electrode layer 22, the second alignment film layer 23, and the second liquid crystal alignment monomer layer 24 are disposed in order on an upper surface of the second underlying layer 21. The second alignment film layer 23 is made of polyimide, which is one of organic polymer materials.

[0042] In the present embodiment, under the condition of applying voltage, by using the heat gun and UV rays to perform heat and light treatment to the first substrate to make a link reaction occur between the common electrode layer and the first liquid crystal alignment monomer layer and form a first alignment film layer, and using the first alignment film layer to orient the liquid crystal molecules of the liquid crystal layer regularly, affecting the display effect of a display panel.

[0043] In particular, the reactive monomer of the first liquid crystal alignment monomer layer gathers toward the common electrode layer when heated, making a link reaction occur between the liquid crystal alignment monomer layer occurs a link reaction and the common electrode layer under the effect of UV rays to form the alignment film layer.

[0044] In the present embodiment, a vertical electric field that drives the liquid crystal molecules to rotate is generated between the pixel electrode layer and the common electrode layer, and the heat gun is used to heat the first substrate. On the one hand, a polyimide layer disposed in a color filter substrate of the conventional technology can be removed to eliminate a polyimide coating process, and a rubbing process, which prevent defects introduced therefrom. On the other hand, during the course of alignment, by using the heat gun to heat the second substrate, the liquid crystal molecules of the liquid crystal layer can be aligned uniformly to overcome the technical problem of undesirable alignment of the conventional technology, increasing yields and competitiveness of products.

[0045] Besides, during the course of alignment, because a second liquid crystal alignment monomer layer is disposed between the liquid crystal layer and the second substrate, under the condition of applying voltage, the liquid crystal monomer molecules of the second liquid crystal alignment monomer layer will gather toward the second alignment film layer and orient the liquid crystal molecules of the liquid crystal layer regularly, which therefore affects the display effect of a display panel.

[0046] Although the present invention has been explained in relation to its preferred embodiment, it does not intend to limit the present invention. It will be apparent to those skilled in the art having regard to this present invention that other modifications of the exemplary embodiments beyond those embodiments specifically described here may be made without departing from the spirit of the invention. Accordingly, such modifications are considered within the scope of the invention as limited solely by the appended claims.