CN114563891B

CN114563891B - Liquid crystal display panel, manufacturing method thereof and display device

Info

Publication number: CN114563891B
Application number: CN202210201628.2A
Authority: CN
Inventors: 童芬
Original assignee: InfoVision Optoelectronics Kunshan Co Ltd
Current assignee: InfoVision Optoelectronics Kunshan Co Ltd
Priority date: 2022-03-03
Filing date: 2022-03-03
Publication date: 2023-08-15
Anticipated expiration: 2042-03-03
Also published as: CN114563891A

Abstract

The invention discloses a liquid crystal display panel, a manufacturing method thereof and a display device. The liquid crystal display panel includes: the liquid crystal display comprises a first substrate, a liquid crystal layer, a second substrate, a pixel electrode layer and a metal reflecting layer; the pixel region comprises a transmission region and a reflection region, and the thickness of the liquid crystal layer of the transmission region is equal to that of the liquid crystal layer of the reflection region; a first public electrode layer is arranged between the second substrate corresponding transmission region and the liquid crystal layer, a second public electrode layer is arranged between the second substrate corresponding reflection region and the liquid crystal layer, and the second public electrode layer is arranged in an insulating way with the first public electrode layer; wherein a voltage difference between the first common electrode layer and the pixel electrode layer is different from a voltage difference between the second common electrode layer and the pixel electrode layer when power is applied. Accordingly, the transflective liquid crystal display panel and the display device with the single-box thick liquid crystal layer are realized, the manufacturing process and the manufacturing cost of the transflective liquid crystal display panel and the display device are reduced, and meanwhile, excellent display quality is realized.

Description

Liquid crystal display panel, manufacturing method thereof and display device

Technical Field

The invention relates to the technical field of display, in particular to a liquid crystal display panel, a manufacturing method thereof and a display device.

Background

Liquid crystal display devices are favored because of their low power consumption, low radiation, thin thickness, and large screen fabrication. According to the type of light source used, the liquid crystal display device can be divided into three types of transmission type, reflection type and semi-reflection and semi-transmission type, wherein the semi-reflection and semi-transmission type liquid crystal display device has the advantages of the transmission type and the reflection type liquid crystal display device and is widely applied to display equipment of electronic products.

The existing half-reflection half-transmission type liquid crystal display device generally adopts a double-box thick structure, namely, the thickness of a liquid crystal layer of a transmission area is different from that of a reflection area, although the phase retardation of light emergent from the transmission area is consistent with that of the reflection area, so that the image display effect of the transmission area is consistent with that of the reflection area. However, the liquid crystal display device with the double-box thick structure needs to prepare liquid crystal layers with different thicknesses on the same display device, and a delay layer or a polaroid composite optical delay film is additionally arranged in the liquid crystal box, so that the manufacturing process is complex, the cost is high, and meanwhile, the uniformity of the box thickness is not easy to control and the display quality is easy to influence.

Disclosure of Invention

The invention provides a liquid crystal display panel, a manufacturing method thereof and a display device, which are used for realizing a semi-reflective and semi-transparent liquid crystal display panel and a display device with a single-box thick liquid crystal layer, reducing the manufacturing process and cost of the semi-reflective and semi-transparent liquid crystal display panel and the display device, and realizing excellent display quality.

In a first aspect, an embodiment of the present invention provides a liquid crystal display panel, including:

a first substrate and a second substrate arranged opposite to the first substrate;

a liquid crystal layer is arranged between the first substrate and the second substrate;

a plurality of pixel areas are arranged on the first substrate and the second substrate, each pixel area comprises a transmission area and a reflection area, and the thickness of a liquid crystal layer of the transmission area is equal to that of a liquid crystal layer of the reflection area;

a pixel electrode layer is arranged between the first substrate and the liquid crystal layer, a metal reflecting layer is arranged between the first substrate corresponding to the reflecting area and the liquid crystal layer, and the metal reflecting layer is positioned at one side of the pixel electrode layer far away from the first substrate and is insulated from the pixel electrode layer;

a first public electrode layer is arranged between the second substrate corresponding to the transmission region and the liquid crystal layer, a second public electrode layer is arranged between the second substrate corresponding to the reflection region and the liquid crystal layer, and the second public electrode layer is arranged in an insulating manner with the first public electrode layer;

wherein a voltage difference between the first common electrode layer and the pixel electrode layer is different from a voltage difference between the second common electrode layer and the pixel electrode layer when power is applied.

Optionally, the pixel area includes a plurality of sub-pixels, one of the sub-pixels corresponds to one of the transmission areas or one of the reflection areas, the sub-pixel corresponding to one of the transmission areas is a transmission sub-pixel, and the sub-pixel corresponding to one of the reflection areas is a reflection sub-pixel;

the pixel electrode layer comprises a first pixel electrode corresponding to the transmission area and a second pixel electrode corresponding to the reflection area, and the first pixel electrode and the second pixel electrode are arranged in an insulating way;

at power-up, a voltage difference between the first common electrode layer and the first pixel electrode is different from a voltage difference between the second common electrode layer and the second pixel electrode.

Optionally, in the transmissive sub-pixel, a first insulating layer and a first planarization layer are sequentially disposed on a side, close to the liquid crystal layer, of the first common electrode layer, and a second planarization layer is disposed between the first pixel electrode and the liquid crystal layer;

in the reflective sub-pixel, a second insulating layer is arranged between the second common electrode layer and the second substrate, a third flattening layer is arranged on one side, close to the liquid crystal layer, of the second common electrode layer, a third insulating layer is arranged between the second pixel electrode and the metal reflecting layer, and a fourth flattening layer is arranged between the metal reflecting layer and the liquid crystal layer;

The first insulating layer and the second insulating layer are integrally formed, the first planarization layer and the third planarization layer are integrally formed, and the second planarization layer and the fourth planarization layer are integrally formed.

Optionally, the transmissive sub-pixel includes a first TFT switch for powering the first pixel electrode, the first TFT switch being connected to the first pixel electrode;

the reflective sub-pixel includes a second TFT switch for powering the second pixel electrode, the second TFT switch being connected to the second pixel electrode.

Optionally, the plurality of pixel regions are arranged in an array;

in the row direction, the transmissive sub-pixels and the reflective sub-pixels are alternately arranged accordingly;

in the column direction, the transmissive sub-pixels are arranged in sequence or the reflective sub-pixels are arranged in sequence, respectively;

the first TFT switch and the second TFT switch which are positioned in the same row are connected with the same grid scanning signal line;

the first TFT switches located in the same column are connected to the same data signal line or the second TFT switches located in the same column are connected to the same data signal line.

Optionally, the first pixel electrode includes a plurality of strip electrodes arranged at intervals, each strip electrode is connected, and the second pixel electrode is a planar electrode;

Or the first pixel electrode comprises a plurality of strip-shaped electrodes which are arranged at intervals, each strip-shaped electrode is connected, and the second pixel electrode has the same structure as the first pixel electrode.

Optionally, the pixel area includes a plurality of sub-pixels, one of the sub-pixels corresponds to one of the transmission areas and one of the reflection areas, and the sub-pixel corresponding to one of the transmission areas and one of the reflection areas is a transflective sub-pixel;

the pixel electrode layer comprises a first pixel electrode corresponding to the transmission region and a second pixel electrode corresponding to the reflection region;

an integrally formed fourth insulating layer is arranged on one side of the first common electrode layer close to the liquid crystal layer and one side of the second common electrode layer far away from the liquid crystal layer; a fifth planarization layer is arranged between the second common electrode layer and the liquid crystal layer, and covers the surface of the fourth insulating layer far away from the first common electrode layer;

a third insulating layer is arranged between the second pixel electrode and the metal reflecting layer, a sixth flattening layer is arranged between the metal reflecting layer and the liquid crystal layer, and the sixth flattening layer covers the surface, far away from the first substrate, of the first pixel electrode;

Optionally, the first pixel electrode and the second pixel electrode are integrally formed;

the transflective sub-pixel includes a third TFT switch for powering the first pixel electrode, the third TFT switch being connected to the first pixel electrode.

Optionally, the plurality of pixel regions are arranged in an array;

in the row direction, the transflective sub-pixels are arranged in sequence accordingly;

in the column direction, the reflection regions and the transmission regions are alternately arranged in sequence, respectively;

the third TFT switches positioned in the same row are connected with the same grid scanning signal line;

the third TFT switches located in the same column are connected to the same data signal line.

In a second aspect, an embodiment of the present invention further provides a display apparatus, including: comprising a liquid crystal display panel as described in the first aspect; the liquid crystal display device further comprises a backlight module, and the backlight module is positioned at one side of the first substrate far away from the liquid crystal layer.

In a third aspect, an embodiment of the present invention further provides a method for manufacturing a liquid crystal display panel, including:

Providing a first substrate and a second substrate, wherein a plurality of pixel areas are arranged on the first substrate and the second substrate, and each pixel area comprises a transmission area and a reflection area;

forming a pixel electrode layer on the first substrate;

forming a metal reflecting layer corresponding to the reflecting area on one side of the pixel electrode layer far away from the first substrate, wherein the metal reflecting layer is arranged in an insulating way with the pixel electrode layer;

corresponding to the transmission area and the reflection area, forming a liquid crystal layer on one side of the metal reflection layer far away from the pixel electrode layer, wherein the thickness of the liquid crystal layer of the transmission area is equal to that of the liquid crystal layer of the reflection area;

forming a first common electrode layer corresponding to the transmissive region on the second substrate;

forming a second common electrode layer corresponding to the reflection region on the second substrate, wherein the second common electrode layer is arranged in an insulating manner with the first common electrode layer;

disposing a side of the second substrate, on which the first common electrode layer and the second common electrode layer are disposed, on a side of the liquid crystal layer away from the first substrate;

Optionally, forming a pixel electrode layer on the first substrate includes: forming a first pixel electrode corresponding to the transmission region on the first substrate, and forming a second pixel electrode corresponding to the reflection region on the first substrate, wherein the first pixel electrode and the second pixel electrode are arranged in an insulating manner;

forming a metal reflecting layer corresponding to the reflecting area on one side of the pixel electrode layer far away from the first substrate, wherein the metal reflecting layer is arranged in an insulating manner with the pixel electrode layer, and the metal reflecting layer comprises: sequentially forming a third insulating layer and a metal reflecting layer corresponding to the reflecting area on one side of the second pixel electrode far away from the first substrate;

forming a metal reflecting layer corresponding to the reflecting area on one side of the pixel electrode layer far away from the first substrate, wherein the metal reflecting layer is arranged in an insulating way with the pixel electrode layer, and then the metal reflecting layer further comprises: forming a second planarization layer on one side of the first pixel electrode far away from the first substrate, and forming a fourth planarization layer on one side of the second pixel electrode far away from the first substrate, wherein the second planarization layer and the fourth planarization layer are integrally formed;

forming a first common electrode layer corresponding to the transmissive region on the second substrate, and then further comprising: forming a first insulating layer corresponding to the transmission region and a second insulating layer corresponding to the reflection region on one side of the first common electrode layer away from the second substrate, wherein the first insulating layer and the second insulating layer are integrally formed;

Forming a second common electrode layer corresponding to the reflection region on the second substrate, wherein the second common electrode layer is arranged in an insulating manner with the first common electrode layer, and the method comprises the following steps: forming a second common electrode layer corresponding to the reflection area on one side of the second insulating layer far away from the second substrate, and forming a third planarization layer corresponding to the reflection area and a first planarization layer corresponding to the transmission area on one side of the second common electrode layer far away from the second substrate, wherein the third planarization layer and the first planarization layer are integrally formed;

Optionally, forming a pixel electrode layer on the first substrate includes: forming a first pixel electrode corresponding to the transmission region on the first substrate, and forming a second pixel electrode corresponding to the reflection region on the first substrate, wherein the first pixel electrode and the second pixel electrode are integrally formed;

forming a second common electrode layer corresponding to the reflection area on the second substrate, wherein the second common electrode layer is arranged in an insulating way with the first common electrode layer, and the method further comprises the following steps: forming a fourth insulating layer on one side of the first common electrode layer far away from the second substrate and one side of the second common electrode layer close to the second substrate in an integrated manner;

Forming a second common electrode layer corresponding to the reflection area on the second substrate, wherein the second common electrode layer is arranged in an insulating way with the first common electrode layer, and then the method further comprises the following steps: forming a fifth planarization layer corresponding to the transmission area and the reflection area on one side of the second common electrode layer away from the second substrate in an integrated manner;

forming a metal reflecting layer corresponding to the reflecting area on one side of the pixel electrode layer far away from the first substrate, wherein the metal reflecting layer is arranged in an insulating way with the pixel electrode layer, and then the metal reflecting layer further comprises: forming a sixth planarization layer corresponding to the transmission area and the reflection area on one side of the metal reflection layer far away from the first substrate in an integrated mode;

According to the technical scheme, the pixel electrode layer is arranged between the first substrate and the liquid crystal layer, the metal reflecting layer is arranged between the first substrate corresponding reflecting area and the liquid crystal layer, the metal reflecting layer is arranged on one side, far away from the first substrate, of the pixel electrode layer and is arranged in an insulating mode with the pixel electrode layer, the first common electrode layer is arranged between the second substrate corresponding transmitting area and the liquid crystal layer, the second common electrode layer is arranged between the second substrate corresponding reflecting area and the liquid crystal layer, the second common electrode layer is insulated from the first common electrode layer, and when power is applied, the voltage difference between the second common electrode layer and the pixel electrode layer is different from the voltage difference between the first common electrode layer and the pixel electrode layer, and the voltage difference between the second common electrode layer and the pixel electrode layer and/or the voltage difference between the first common electrode layer and the pixel electrode layer are/is adjusted, so that when the liquid crystal layer with the thickness of a single box is adopted, light rays respectively have the same phase retardation amount in the transmitting area and the reflecting area, the image display effect of the transmitting area and the reflecting area is consistent without a double-box thick structure, wherein the single-box thickness refers to the same liquid crystal layer.

Therefore, when the liquid crystal display panel provided by the embodiment of the invention is adopted, liquid crystal layers with different thicknesses are not required to be manufactured when the liquid crystal layers are formed, only one liquid crystal layer with the same thickness is required to be manufactured, and a delay layer or a polaroid composite optical delay film is not required to be additionally arranged in the liquid crystal box, so that the manufacturing process of the transflective liquid crystal display panel and the display device is reduced, and the cost is further reduced; meanwhile, compared with a liquid crystal layer with double-box thickness, the liquid crystal display device has better box thickness uniformity and realizes excellent display quality.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

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

fig. 2 is a schematic view of a partial enlarged structure of a first substrate according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a transmissive sub-pixel according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a reflective sub-pixel according to an embodiment of the present invention;

FIG. 5 is a schematic view of a partial enlarged structure of another first substrate according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a transflective sub-pixel according to an embodiment of the present invention;

fig. 7 is a schematic flow chart of a method for manufacturing a liquid crystal display panel according to an embodiment of the invention;

FIG. 8 is a flowchart of another method for fabricating a liquid crystal display panel according to an embodiment of the present invention;

fig. 9 is a flowchart of another method for manufacturing a liquid crystal display panel according to an embodiment of the invention.

Detailed Description

In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.

Fig. 1 is a schematic structural diagram of a liquid crystal display panel according to an embodiment of the present invention. Referring to fig. 1, the liquid crystal display panel includes:

A first substrate 100 and a second substrate 200 disposed opposite to the first substrate 100; a liquid crystal layer 300 is disposed between the first substrate 100 and the second substrate 200; the first substrate 100 and the second substrate 200 are provided with a plurality of pixel regions including a transmissive region and a reflective region, and the thickness of the liquid crystal layer 300 of the transmissive region is equal to the thickness of the liquid crystal layer 300 of the reflective region; a pixel electrode layer 110 is arranged between the first substrate 100 and the liquid crystal layer 300, a metal reflecting layer 120 is arranged between the corresponding reflecting area of the first substrate 100 and the liquid crystal layer 300, and the metal reflecting layer 120 is positioned at one side of the pixel electrode layer 110 away from the first substrate 100 and is insulated from the pixel electrode layer 110; a first common electrode layer 210 is arranged between the corresponding transmission region of the second substrate 200 and the liquid crystal layer 300, a second common electrode layer 220 is arranged between the corresponding reflection region of the second substrate 200 and the liquid crystal layer 300, and the second common electrode layer 220 is arranged in an insulating manner with the first common electrode layer 210; wherein, at power-up, a voltage difference between the first common electrode layer 210 and the pixel electrode layer 110 is different from a voltage difference between the second common electrode layer 220 and the pixel electrode layer 110.

Specifically, the first substrate 100 may include a TFT (Thin Film Transistor ) glass substrate, and the second substrate 200 may include a color film glass substrate and a color filter film disposed on a side of the color film glass substrate facing the liquid crystal layer 300. The thickness of the liquid crystal layer 300 corresponding to the transmissive region is equal to the thickness of the liquid crystal layer 300 corresponding to the reflective region, i.e., the liquid crystal display panel of the embodiment of the invention has a single-cell thick structure, and the thickness of the entire liquid crystal layer 300 is unchanged. The pixel electrode layer 110 may be a transparent electrode layer, the metal reflective layer 120 may be a light-tight metal film layer, and the insulating arrangement between the pixel electrode layer 110 and the metal reflective layer 120 may be achieved by disposing an insulating film layer between the pixel electrode layer 110 and the metal reflective layer 120, and disposing the metal reflective layer 120 corresponding to the reflective region so that light incident into the reflective region is reflected to the liquid crystal layer 300 via the metal reflective layer 120.

The first and second common electrode layers 210 and 220 may be transparent electrode layers, and the insulating arrangement of both may be achieved by disposing an insulating film layer between the first and second common electrode layers 210 and 220. In the liquid crystal display panel of the embodiment of the invention, the common electrode between the second substrate 200 and the liquid crystal layer 300 is arranged in two parts, one part is the first common electrode layer 210 corresponding to the transmission region, and the other part is the second common electrode layer 220 corresponding to the reflection region, so that the voltage difference between the first common electrode layer 210 and the pixel electrode layer 110 and the voltage difference between the second common electrode layer 220 and the pixel electrode layer 110 can be respectively independently adjusted, and the voltage applied to the liquid crystal layer 300 corresponding to the transmission region and the voltage applied to the liquid crystal layer 300 corresponding to the reflection region can be independently adjusted and controlled. For example, when the potential of the pixel electrode layer 110 is the reference potential, independent adjustment of the voltage difference between the first common electrode layer 210 and the pixel electrode layer 110 and the voltage difference between the second common electrode layer 220 and the pixel electrode layer 110 can be achieved by adjusting the potential of the first common electrode layer 210 and the potential of the second common electrode layer 220, respectively.

The liquid crystal molecules in the liquid crystal layer 300 are either positive liquid crystal molecules or negative liquid crystal molecules. The voltages applied to the liquid crystal layer 300 are different, and the arrangement of the liquid crystal molecules in the liquid crystal layer 300 is different. When the voltage difference between the first common electrode layer 210 and the pixel electrode layer 110 and the voltage difference between the second common electrode layer 220 and the pixel electrode layer 110 are different, the voltage applied to the liquid crystal layer 300 corresponding to the transmissive region and the voltage applied to the liquid crystal layer 300 corresponding to the reflective region are different, so that the arrangement of the liquid crystal molecules in the liquid crystal layer 300 corresponding to the transmissive region is different from the arrangement of the liquid crystal molecules in the liquid crystal layer 300 corresponding to the reflective region, and the light passes through the liquid crystal layer 300 corresponding to the transmissive region and the liquid crystal layer 300 corresponding to the reflective region, respectively, to generate different phase delays.

For example, when the voltage difference between the first common electrode layer 210 and the pixel electrode layer 110 is Δv1 and the voltage difference between the first common electrode layer 210 and the pixel electrode layer 110 is Δv2, correspondingly, the phase delay generated by the light passing through the liquid crystal layer 300 corresponding to the transmissive region once is Δn1 and the phase delay generated by the light passing through the liquid crystal layer 300 corresponding to the reflective region once is Δn2.

In order to realize transflective display, the image display effects of the transmissive region and the reflective region are consistent, the phase retardation of the light passing through the liquid crystal layer 300 corresponding to the transmissive region once is Δn1×dn=λ/2, the phase retardation of the light passing through the liquid crystal layer 300 corresponding to the reflective region once is Δn2×dm=λ/4, and in the overall effect Δn1×dn=2 Δn2×dm, dn is the optical path of the light passing through the liquid crystal layer 300 once in the transmissive region, dm is the optical path of the light passing through the liquid crystal layer 300 once in the reflective region, and the wavelength λ of green light which is sensitive to human eyes is set, so that the display effects of the green light wavelength band and the nearby band are consistent, and the display is more comfortable for a viewer to watch. Since the thickness of the liquid crystal layer 300 corresponding to the transmissive region is the same as that of the liquid crystal layer 300 corresponding to the reflective region, dn=dm, Δn1/Δn2=2, and in the reflective region, light passes through the liquid crystal layer 300 corresponding to the reflective region twice, so that the amounts of retardation of the light in passing through the liquid crystal layer 300 corresponding to the transmissive region and the liquid crystal layer 300 corresponding to the reflective region are the same, whereby it is possible to achieve uniform image display effects of the transmissive region and the reflective region. In practice, the amount of phase retardation of the light passing through the liquid crystal layer 300 corresponding to the transmissive region once may be approximately 2 times the amount of phase retardation of the light passing through the liquid crystal layer 300 corresponding to the reflective region once.

As can be seen from the above, in the lcd panel according to the embodiment of the invention, the common electrode between the second substrate 200 and the liquid crystal layer 300 is arranged in two parts, so that the voltage difference between the first common electrode layer 210 and the pixel electrode layer 110 and the voltage difference between the second common electrode layer 220 and the pixel electrode layer 110 can be adjusted independently. When the voltage difference between the first common electrode layer 210 and the pixel electrode layer 110 and the voltage between the second common electrode layer 220 and the pixel electrode layer 110 correspond to specific values, respectively, the phase retardation of the light passing through the liquid crystal layer 300 corresponding to the transmissive area at one time is 2 times (or approximately 2 times) the phase retardation of the light passing through the liquid crystal layer 300 corresponding to the reflective area at one time, and further the phase retardation amounts of the light passing through the liquid crystal layer 300 corresponding to the transmissive area and the liquid crystal layer 300 corresponding to the reflective area are the same, thereby realizing the uniformity of the image display effects of the transmissive area and the reflective area. The technical scheme of the embodiment of the invention can lead the transmission area and the reflection area to have the same phase retardation without arranging a double-box thick structure, has consistent image display effect of the transmission area and the reflection area, and does not need to additionally arrange a retardation layer or a polarizer composite optical retardation film in the liquid crystal box, thereby reducing the manufacturing process of the semi-reflection and semi-transmission type liquid crystal display panel and the display device and further reducing the cost; meanwhile, compared with a liquid crystal layer with double-box thickness, the liquid crystal display device has better box thickness uniformity and realizes excellent display quality.

In the above-described embodiment, in the case where it is satisfied that the phase retardation of the liquid crystal layer 300 in which light passes through the corresponding transmissive region once is 2 times the phase retardation of the liquid crystal layer 300 in which light passes through the corresponding reflective region once, the specific value of the voltage difference between the first common electrode layer 210 and the pixel electrode layer 110 and the specific value of the voltage difference between the second common electrode layer 220 and the pixel electrode layer 110 are related to the properties of the liquid crystal, such as refractive index properties, dielectric anisotropy properties, etc., may be determined according to practical situations.

Alternatively, the materials of the pixel electrode layer 110, the first common electrode layer 210 and the second common electrode layer 220 may be Indium Tin Oxide (ITO).

The liquid crystal alignment layers may be further disposed on both sides of the liquid crystal layer 300 on the basis of the above embodiments, and the pixel electrode layer 110, the first common electrode layer 210 and the second common electrode layer 220 may be disposed in various manners, and the following is only an exemplary illustration, but not a limitation of the present invention.

Fig. 2 is a schematic diagram of a partial enlarged structure of a first substrate according to an embodiment of the present invention. Referring to fig. 2, in an embodiment of the present invention, optionally, the pixel region includes a plurality of sub-pixels, one sub-pixel corresponds to one transmissive region or one reflective region, the sub-pixel corresponding to one transmissive region is a transmissive sub-pixel, and the sub-pixel corresponding to one reflective region is a reflective sub-pixel; the pixel electrode layer 110 includes a first pixel electrode 111 corresponding to the transmissive region and a second pixel electrode 112 corresponding to the reflective region, and the first pixel electrode 111 is disposed in an insulating manner with the second pixel electrode 112; at power-up, a voltage difference between the first common electrode layer 210 and the first pixel electrode 111 is different from a voltage difference between the second common electrode layer 220 and the second pixel electrode 112.

Specifically, three sub-pixels of red, green and blue are arranged in the pixel region, wherein the sub-pixel corresponding to one transmission region is a transmission sub-pixel and the sub-pixel corresponding to one reflection region is a reflection sub-pixel, the transmission sub-pixel is used for displaying when the liquid crystal display panel realizes transmission type display, and the reflection sub-pixel is used for displaying when the liquid crystal display panel realizes reflection type display. Illustratively, three transmissive sub-pixels and three reflective sub-pixels are disposed within the pixel region, the three transmissive sub-pixels including three sub-pixels of red, green and blue, and the three reflective sub-pixels including three sub-pixels of red, green and blue.

The transmissive sub-pixel may include a first pixel electrode 111 and the reflective sub-pixel may include a second pixel electrode 112, the first pixel electrode 111 and the second pixel electrode 112 being independently disposed. Accordingly, the voltage applied to the liquid crystal layer 300 corresponding to the transmissive region may be adjusted by adjusting the potential of the first pixel electrode 111 and/or the first common electrode layer 210, and the voltage applied to the liquid crystal layer 300 corresponding to the reflective region may be adjusted by adjusting the potential of the second pixel electrode 112 and/or the second common electrode layer 220; when the voltage applied to the liquid crystal layer 300 corresponding to the transmissive area and the voltage applied to the liquid crystal layer 300 corresponding to the reflective area are adjusted to be specific values, respectively, the phase retardation of the light passing through the liquid crystal layer 300 corresponding to the transmissive area at one time is 2 times that of the light passing through the liquid crystal layer 300 corresponding to the reflective area at one time, so that the transmissive area and the reflective area have the same phase retardation under the condition of single-cell thickness, and the image display effects of the transmissive area and the reflective area are consistent.

Fig. 3 is a schematic structural diagram of a transmissive sub-pixel according to an embodiment of the present invention, and fig. 4 is a schematic structural diagram of a reflective sub-pixel according to an embodiment of the present invention. Referring to fig. 3 and 4, in an embodiment of the present invention, optionally, in the transmissive sub-pixel, a first insulating layer 211 and a first planarization layer 212 are sequentially disposed on a side of the first common electrode layer 210 adjacent to the liquid crystal layer 300, and a second planarization layer 213 is disposed between the first pixel electrode 111 and the liquid crystal layer 300; in the reflective sub-pixel, a second insulating layer 221 is disposed between the second common electrode layer 220 and the second substrate 200, a third planarization layer 222 is disposed on a side of the second common electrode layer 220 close to the liquid crystal layer 300, a third insulating layer 223 is disposed between the second pixel electrode 112 and the metal reflective layer 120, and a fourth planarization layer 224 is disposed between the metal reflective layer 120 and the liquid crystal layer 300;

namely, the transmissive sub-pixel includes a first common electrode layer 210, a first insulating layer 211, a first planarization layer 212, a liquid crystal layer 300 corresponding to the transmissive region, a first pixel electrode 111, and a second planarization layer 213. The reflective sub-pixel includes a second insulating layer 221, a second common electrode layer 220, a third planarization layer 222, a liquid crystal layer 300 corresponding to the reflective region, a second pixel electrode 112, a third insulating layer 223, a metal reflective layer 120, and a fourth planarization layer 224. The third insulating layer 223 may be an opaque insulating layer, which is beneficial to blocking the liquid crystal layer 300 corresponding to the backlight incident reflection area in the backlight module.

Alternatively, the first insulating layer 211 and the second insulating layer 221 are integrally formed, the first planarizing layer 212 and the third planarizing layer 222 are integrally formed, and the second planarizing layer 213 and the fourth planarizing layer 224 are integrally formed. That is, the first insulating layer 211 in the transmissive subpixel and the second insulating layer 221 in the reflective subpixel are formed in the same process, the first planarizing layer 212 in the transmissive subpixel and the third planarizing layer 222 in the reflective subpixel are formed in the same process, and the second planarizing layer 213 in the transmissive subpixel and the fourth planarizing layer 224 in the reflective subpixel are formed in the same process, so as to ensure a lower manufacturing cost of the liquid crystal display panel.

Optionally, with continued reference to fig. 3, the first pixel electrode 111 includes a plurality of stripe electrodes 1110 spaced apart and arranged in parallel, each stripe electrode 1110 is connected, and the second pixel electrode 112 has the same structure as the first pixel electrode 111. The size of the interval may be specifically set based on the characteristics of the liquid crystal molecules in the liquid crystal layer 300 and actual requirements.

Alternatively, referring to fig. 3 and 4, the first pixel electrode 111 includes a plurality of spaced stripe electrodes 1110 arranged in parallel, each stripe electrode 1110 is connected, and the second pixel electrode 112 is a planar electrode. In the case where both the metal reflective layer 120 and the third insulating layer 223 are of a planar structure, providing the second pixel electrode 112 as a planar electrode is advantageous in simplifying the manufacturing process of the liquid crystal display panel.

With continued reference to fig. 2, in one embodiment of the invention, optionally, the transmissive subpixel includes a first TFT switch M1 for powering the first pixel electrode 111, the first TFT switch M1 being connected to the first pixel electrode 111; the reflective sub-pixel comprises a second TFT switch M2 for powering the second pixel electrode 112, the second TFT switch M2 being connected to the second pixel electrode 112, i.e. when the pixel area comprises a transmissive sub-pixel and a reflective sub-pixel arranged independently, the potentials of the first pixel electrode 111 and the second pixel electrode 112 can be controlled with two TFT switches, respectively.

With continued reference to fig. 2, in an embodiment of the present invention, optionally, a plurality of pixel areas are arranged in an array, that is, a plurality of transmissive sub-pixels and a plurality of reflective sub-pixels form sub-pixels arranged in an array in the liquid crystal display panel; in the row direction, transmissive sub-pixels and reflective sub-pixels are alternately arranged accordingly; in the column direction, the transmissive sub-pixels are arranged in sequence or the reflective sub-pixels are arranged in sequence accordingly; the first TFT switch M1 and the second TFT switch M2 positioned in the same row are connected with the same Gate scanning signal line Gate; the first TFT switches M1 located in the same column are connected to the same Data signal line Data or the second TFT switches M2 located in the same column are connected to the same Data signal line Data.

Fig. 5 is a schematic view of a partial enlarged structure of another first substrate according to an embodiment of the present invention, and fig. 6 is a schematic view of a structure of a transflective sub-pixel according to an embodiment of the present invention. In an embodiment of the present invention, as shown in fig. 5 and 6, optionally, the pixel area includes a plurality of sub-pixels, where one sub-pixel corresponds to one transmissive region and one reflective region, and the sub-pixel corresponding to one transmissive region and one reflective region is a transflective sub-pixel; the pixel electrode layer 110 includes a first pixel electrode 111 corresponding to the transmissive region and a second pixel electrode 112 corresponding to the reflective region; the first common electrode layer 210 is provided with an integrally formed fourth insulating layer 130 on a side close to the liquid crystal layer 300 and on a side of the second common electrode layer 220 away from the liquid crystal layer 300; a fifth planarization layer 140 is disposed between the second common electrode layer 220 and the liquid crystal layer 300, the fifth planarization layer 140 covering a surface of the fourth insulating layer 130 remote from the first common electrode layer 210; a third insulating layer 223 is disposed between the second pixel electrode 112 and the metal reflective layer 120, a sixth planarization layer 150 is disposed between the metal reflective layer 120 and the liquid crystal layer 300, and the sixth planarization layer 150 covers the surface of the first pixel electrode 111 away from the first substrate 100; at power-up, a voltage difference between the first common electrode layer 210 and the first pixel electrode 111 is different from a voltage difference between the second common electrode layer 220 and the second pixel electrode 112.

Specifically, three sub-pixels of red, green and blue are arranged in the pixel area, wherein one sub-pixel corresponds to one transmission area and one reflection area, and each sub-pixel corresponds to one transmission area and one reflection area, namely each sub-pixel is a transmission sub-pixel, and the transmission sub-pixel is used as a transmission sub-pixel and a reflection sub-pixel of the liquid crystal display panel, so that the liquid crystal display panel can display when the liquid crystal display panel realizes transmission display and can display when the liquid crystal display panel realizes reflection display. The transflective sub-pixel includes a first common electrode layer 210, a second common electrode layer 220, a fourth insulating layer 130, a fifth planarization layer 140, a liquid crystal layer 300 corresponding to a transmissive region, a liquid crystal layer 300 corresponding to a reflective region, a first pixel electrode 111, a second pixel electrode 112, a third insulating layer 223, a metal reflective layer 120, and a sixth planarization layer 150. Illustratively, three transflective sub-pixels are disposed within the pixel region, the three transflective sub-pixels including three sub-pixels of red, green and blue.

The voltage applied to the liquid crystal layer 300 corresponding to the transmissive area may be adjusted by adjusting the potential of the first pixel electrode 111 and/or the first common electrode layer 210, and the voltage applied to the liquid crystal layer 300 corresponding to the reflective area may be adjusted by adjusting the potential of the second pixel electrode 112 and/or the second common electrode layer 220; when the voltage applied to the liquid crystal layer 300 corresponding to the transmissive area and the voltage applied to the liquid crystal layer 300 corresponding to the reflective area are adjusted to be specific values, respectively, the phase retardation of the light passing through the liquid crystal layer 300 corresponding to the transmissive area at one time is 2 times that of the light passing through the liquid crystal layer 300 corresponding to the reflective area at one time, so that the transmissive area and the reflective area have the same phase retardation under the condition of single-cell thickness, and the image display effects of the transmissive area and the reflective area are consistent.

Alternatively, with continued reference to fig. 6, the first pixel electrode 111 includes a plurality of stripe electrodes 1110 spaced apart and arranged in parallel, each stripe electrode 1110 is connected, and the second pixel electrode 112 has the same structure as the first pixel electrode 111.

Alternatively, with continued reference to fig. 6, the first pixel electrode 111 includes a plurality of stripe electrodes 1110 spaced apart and arranged in parallel, each stripe electrode 1110 is connected, and the second pixel electrode 112 is a planar electrode.

Alternatively, with continued reference to fig. 5, in one embodiment of the present invention, the first pixel electrode 111 and the second pixel electrode 112 are integrally formed such that the first pixel electrode 111 and the second pixel electrode 112 are connected, and the transflective sub-pixel includes a third TFT switch M3 for supplying power to the first pixel electrode, the third TFT switch M3 being connected to the first pixel electrode. That is, when the independently disposed transflective sub-pixel is included in the even pixel region, one TFT switch may be used to simultaneously control the potentials of the first pixel electrode 111 and the second pixel electrode 112.

With continued reference to fig. 5, in an embodiment of the present invention, optionally, the plurality of pixel areas are arranged in an array, that is, the sub-pixels in the liquid crystal display panel are arranged in an array formed by a plurality of transflective sub-pixels; in the row direction, the corresponding transflective sub-pixels are sequentially arranged; in the column direction, the reflective regions and transmissive regions are alternately arranged accordingly; the third TFT switch M3 positioned in the same row is connected with the same Gate scanning signal line Gate; the third TFT switches M3 located in the same column are connected to the same Data signal line Data.

The embodiment of the invention also provides a display device which can be any product or component with a display function, such as a mobile phone, a tablet personal computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like. The display device comprises the liquid crystal display panel provided by any embodiment, and the display device further comprises a backlight module; the backlight module is disposed on a side of the first substrate 100 away from the liquid crystal layer 300, and is used for providing a backlight source required for display for a transmission area in the display device when the display device realizes transmission display. The display device and the liquid crystal display panel provided by the embodiment of the invention belong to the same inventive concept, can realize the same technical effect, and are not repeated here.

The embodiment of the invention also provides a manufacturing method of the liquid crystal display panel, which can be used for manufacturing the liquid crystal display panel of any technical scheme.

Fig. 7 is a flow chart of a method for manufacturing a liquid crystal display panel according to an embodiment of the invention, and referring to fig. 7 in combination with fig. 1, the method for manufacturing a liquid crystal display panel includes:

s10, providing a first substrate and a second substrate, wherein a plurality of pixel areas are arranged on the first substrate and the second substrate, and each pixel area comprises a transmission area and a reflection area.

S11, forming a pixel electrode layer on the first substrate.

And S12, forming a metal reflecting layer corresponding to the reflecting area on one side of the pixel electrode layer away from the first substrate, wherein the metal reflecting layer is arranged in an insulating manner with the pixel electrode layer.

S13, corresponding to the transmission area and the reflection area, forming a liquid crystal layer on one side of the metal reflection layer far away from the pixel electrode layer, wherein the thickness of the liquid crystal layer of the transmission area is equal to that of the liquid crystal layer of the reflection area.

S14, forming a first common electrode layer corresponding to the transmission area on the second substrate.

S15, forming a second public electrode layer corresponding to the reflection area on the second substrate, wherein the second public electrode layer is arranged in an insulating mode with the first public electrode layer.

S16, arranging one surface of the second substrate, on which the first common electrode layer and the second common electrode layer are arranged, on one side of the liquid crystal layer, which is far away from the first substrate; wherein a voltage difference between the first common electrode layer and the pixel electrode layer is different from a voltage difference between the second common electrode layer and the pixel electrode layer when power is applied.

Based on the above technical solution, in one embodiment of the present invention, fig. 8 is a schematic flow chart of another method for manufacturing a liquid crystal display panel according to an embodiment of the present invention, and referring to fig. 8 in combination with fig. 2 to fig. 4, the method for manufacturing a liquid crystal display panel includes:

S20, providing a first substrate and a second substrate, wherein a plurality of pixel areas are arranged on the first substrate and the second substrate, and each pixel area comprises a transmission area and a reflection area.

S21, forming a first pixel electrode corresponding to the transmission area on the first substrate, and forming a second pixel electrode corresponding to the reflection area on the first substrate, wherein the first pixel electrode and the second pixel electrode are arranged in an insulating mode.

S22, a third insulating layer and a metal reflecting layer corresponding to the reflecting area are sequentially formed on one side, far away from the first substrate, of the second pixel electrode.

S23, forming a second planarization layer on one side of the first pixel electrode far away from the first substrate, and forming a fourth planarization layer on one side of the second pixel electrode far away from the first substrate, wherein the second planarization layer and the fourth planarization layer are integrally formed.

S24, corresponding to the transmission area and the reflection area, forming a liquid crystal layer on one side of the metal reflection layer far away from the pixel electrode layer, wherein the thickness of the liquid crystal layer of the transmission area is equal to that of the liquid crystal layer of the reflection area.

S25, forming a first common electrode layer corresponding to the transmission area on the second substrate.

S26, forming a first insulating layer corresponding to the transmission area and a second insulating layer corresponding to the reflection area on one side of the first public electrode layer far away from the second substrate, wherein the first insulating layer and the second insulating layer are integrally formed.

S27, forming a second public electrode layer corresponding to the reflection area on one side of the second insulating layer far away from the second substrate, and forming a third planarization layer corresponding to the reflection area and a first planarization layer corresponding to the transmission area on one side of the second public electrode layer far away from the second substrate, wherein the third planarization layer and the first planarization layer are integrally formed.

S28, arranging one surface of the second substrate, on which the first common electrode layer and the second common electrode layer are arranged, on one side of the liquid crystal layer, which is far away from the first substrate; at power-up, a voltage difference between the first common electrode layer and the first pixel electrode is different from a voltage difference between the second common electrode layer and the second pixel electrode.

On the basis of the above technical solution, in another embodiment of the present invention, fig. 9 is a schematic flow chart of another method for manufacturing a liquid crystal display panel according to an embodiment of the present invention, and referring to fig. 9 in combination with fig. 6, the method for manufacturing a liquid crystal display panel includes:

s30, providing a first substrate and a second substrate, wherein a plurality of pixel areas are arranged on the first substrate and the second substrate, and each pixel area comprises a transmission area and a reflection area.

S31, forming a first pixel electrode corresponding to the transmission region on the first substrate, and forming a second pixel electrode corresponding to the reflection region on the first substrate, wherein the first pixel electrode and the second pixel electrode are integrally formed.

S32, a third insulating layer and a metal reflecting layer corresponding to the reflecting area are sequentially formed on one side, far away from the first substrate, of the second pixel electrode.

S33, forming a sixth planarization layer corresponding to the transmission area and the reflection area on one side of the metal reflection layer away from the first substrate in an integrated mode.

S34, corresponding to the transmission area and the reflection area, forming a liquid crystal layer on one side of the metal reflection layer far away from the pixel electrode layer, wherein the thickness of the liquid crystal layer of the transmission area is equal to that of the liquid crystal layer of the reflection area.

And S35, forming a first common electrode layer corresponding to the transmission region on the second substrate.

S36, forming a fourth insulating layer on one side of the first common electrode layer far away from the second substrate and one side of the second common electrode layer close to the second substrate in an integrated mode.

And S37, forming a second common electrode layer corresponding to the reflection area on the second substrate.

S38, forming a fifth planarization layer corresponding to the transmission area and the reflection area on one side of the second public electrode layer away from the second substrate in an integrated mode.

S39, arranging one surface of the second substrate, on which the first common electrode layer and the second common electrode layer are arranged, on one side of the liquid crystal layer, which is far away from the first substrate; at power-up, a voltage difference between the first common electrode layer and the first pixel electrode is different from a voltage difference between the second common electrode layer and the second pixel electrode.

The manufacturing method of the liquid crystal display panel provided by the embodiment of the invention and the liquid crystal display panel belong to the same invention conception, can realize the same technical effect, and are not repeated here.

The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.

Claims

1. A liquid crystal display panel, comprising:

the pixel area comprises a plurality of sub-pixels, one sub-pixel corresponds to one transmission area or one reflection area, the sub-pixel corresponding to one transmission area is a transmission type sub-pixel, and the sub-pixel corresponding to one reflection area is a reflection type sub-pixel;

a voltage difference between the first common electrode layer and the first pixel electrode and a voltage difference between the second common electrode layer and the second pixel electrode are different at power-up; so that the light rays respectively exit the transmission area and the reflection area with the same phase retardation;

in the transmission type sub-pixel, a first insulating layer and a first flattening layer are sequentially arranged on one side, close to the liquid crystal layer, of the first common electrode layer, and a second flattening layer is arranged between the first pixel electrode and the liquid crystal layer;

2. A liquid crystal display panel, comprising:

the pixel region comprises a plurality of sub-pixels, one sub-pixel corresponds to one transmission region and one reflection region, and the sub-pixel corresponding to one transmission region and one reflection region is a transmission sub-pixel;

A voltage difference between the first common electrode layer and the first pixel electrode and a voltage difference between the second common electrode layer and the second pixel electrode are different at power-up; so that the light rays respectively exit the transmission area and the reflection area with the same phase retardation.

3. The liquid crystal display panel of claim 1, wherein the transmissive subpixel includes a first TFT switch for powering the first pixel electrode, the first TFT switch being connected to the first pixel electrode;

the reflective sub-pixel comprises a second TFT switch for supplying power to the second pixel electrode, and the second TFT switch is connected with the second pixel electrode;

the pixel areas are arranged in an array;

the first TFT switches located in the same column are connected to the same data signal line, or the second TFT switches located in the same column are connected to the same data signal line.

4. The liquid crystal display panel according to claim 2, wherein the first pixel electrode and the second pixel electrode are integrally formed; the transflective sub-pixel comprises a third TFT switch for supplying power to the first pixel electrode, and the third TFT switch is connected with the first pixel electrode;

the pixel areas are arranged in an array;

in the row direction, the transflective sub-pixels are arranged in sequence accordingly; in the column direction, the reflection regions and the transmission regions are alternately arranged, respectively;

the third TFT switches positioned in the same row are connected with the same grid scanning signal line; the third TFT switches located in the same column are connected to the same data signal line.

5. A display device comprising the liquid crystal display panel according to any one of claims 1 to 4; the display device further comprises a backlight module, and the backlight module is positioned at one side of the first substrate far away from the liquid crystal layer.

6. The manufacturing method of the liquid crystal display panel is characterized by comprising the following steps:

Forming a pixel electrode layer on the first substrate;

forming a pixel electrode layer on the first substrate, including: forming a first pixel electrode corresponding to the transmission region on the first substrate, and forming a second pixel electrode corresponding to the reflection region on the first substrate, wherein the first pixel electrode and the second pixel electrode are arranged in an insulating manner;

7. The manufacturing method of the liquid crystal display panel is characterized by comprising the following steps:

forming a pixel electrode layer on the first substrate;

forming a pixel electrode layer on the first substrate, including: forming a first pixel electrode corresponding to the transmission region on the first substrate, and forming a second pixel electrode corresponding to the reflection region on the first substrate, wherein the first pixel electrode and the second pixel electrode are integrally formed;