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CN110441967B - Display module, manufacturing method thereof, driving method thereof and display device - Google Patents

Display module, manufacturing method thereof, driving method thereof and display device Download PDF

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Publication number
CN110441967B
CN110441967B CN201910683500.2A CN201910683500A CN110441967B CN 110441967 B CN110441967 B CN 110441967B CN 201910683500 A CN201910683500 A CN 201910683500A CN 110441967 B CN110441967 B CN 110441967B
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display
display area
display panel
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CN110441967A (en
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沈岭
宁春丽
赵剑
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Shanghai Tianma Microelectronics Co Ltd
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Shanghai Tianma Microelectronics Co Ltd
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/136286—Wiring, e.g. gate line, drain line

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

The invention discloses a display module, a manufacturing method thereof, a driving method thereof and a display device, which relate to the technical field of display and comprise the following steps: a first display panel and a second display panel; in the direction perpendicular to the light emitting surface of the first display panel, the first sub-display area is overlapped with the first display area, and the second sub-display area is not overlapped with the first display area; the second sub-pixels in the first sub-display area and the first sub-pixels in the first display area are arranged in a one-to-one correspondence mode; the length of the first display region along the first direction is L1, the width of the first display region along the second direction is D1, the length of the second display region along the first direction is L2, and the width of the second display region along the second direction is D2; l2 > L1 > 0, D2 > D1 > 0; in the display stage, the second sub-pixels in the second sub-display area keep normally black or not displaying. The invention solves the problems of low image display quality and low process yield of the double-box liquid crystal display module in the prior art.

Description

Display module, manufacturing method thereof, driving method thereof and display device
Technical Field
The invention relates to the technical field of display, in particular to a display module, a manufacturing method thereof, a driving method thereof and a display device.
Background
In the TFT-LCD, the contrast ratio is generally between 1000-1200: 1 in TN and SFT display modes, the contrast ratio can be improved by improving the schemes of adopting pixel optimization design, negative liquid crystal, optical alignment and the like, the contrast ratio is between 1500-1800: 1 after the improvement, the contrast ratio level of 5000-10000: 1 in the VA display mode is difficult to achieve, and the higher contrast ratio is difficult to achieve. However, the conventional VA-type liquid crystal display still has a large limitation on the display effect and the display content based on the display principle, and in order to improve the display effect and the display content of the VA-type liquid crystal display, the methods of increasing the number of driving paths and increasing the pixel density are generally adopted, but the effect is still not very ideal. The dual-cell liquid crystal display is very significant in improving contrast and image quality, and thus, the dual-cell liquid crystal display is becoming a focus of attention.
The existing double-box liquid crystal display has the problems of low image display quality and low process yield.
Disclosure of Invention
In view of the above, the present invention provides a display module, a manufacturing method thereof, a driving method thereof and a display device, so as to solve the problems of low image display quality and low process yield of a dual-cell liquid crystal display module in the prior art.
In a first aspect, the present invention provides a display module, including: the display panel comprises a first display panel and a second display panel which are arranged correspondingly to each other, wherein the first display panel is positioned on a light emergent surface of the second display panel; the first display panel comprises a first display area and a first non-display area surrounding the first display area, the first display area comprises a plurality of first sub-pixels arranged in an array mode, a plurality of first gate lines extending along a first direction and a plurality of first data lines extending along a second direction, two adjacent first data lines and two adjacent first gate lines form a first sub-pixel in a surrounding mode, and the first direction and the second direction are intersected; the second display panel comprises a second display area and a second non-display area surrounding the second display area, the second display area comprises a plurality of second sub-pixels arranged in an array mode, a plurality of second gate lines extending along the first direction and a plurality of second data lines extending along the second direction, and two adjacent second data lines and two adjacent second gate lines form a second sub-pixel in a surrounding mode; the second display area comprises a first sub-display area and a second sub-display area, the first sub-display area and the first display area are overlapped in the direction perpendicular to the light-emitting surface of the first display panel, and the second sub-display area and the first display area are not overlapped; the second sub-pixels in the first sub-display area and the first sub-pixels in the first display area are arranged in a one-to-one correspondence mode; the length of the first display region along the first direction is L1, the width of the first display region along the second direction is D1, the length of the second display region along the first direction is L2, and the width of the second display region along the second direction is D2; wherein, L2 is more than L1 is more than 0, D2 is more than D1 is more than 0; in the display stage, the second sub-pixels in the second sub-display area in the second display panel keep normally black display or non-display.
In a second aspect, the present invention provides a method for manufacturing a display module, including: providing a first display panel, wherein the first display panel comprises a first display area and a first non-display area surrounding the first display area, the first display area comprises a plurality of first sub-pixels arranged in an array, a plurality of first gate lines extending along a first direction and a plurality of first data lines extending along a second direction, two adjacent first data lines and two adjacent first gate lines enclose a first sub-pixel, and the first direction and the second direction are intersected; providing a second display panel, wherein the second display panel comprises a second display area and a second non-display area surrounding the second display area, the second display area comprises a plurality of second sub-pixels arranged in an array, a plurality of second gate lines extending along a first direction and a plurality of second data lines extending along a second direction, and two adjacent second data lines and two adjacent second gate lines enclose a second sub-pixel; the length of the first display area along the first direction is L1, the width of the first display area along the second direction is D1, the length of the second display area along the first direction is L2, and the width of the second display area along the second direction is D2, wherein L2 > L1 > 0, and D2 > D1 > 0; aligning and attaching the first display panel and the second display panel, wherein the second display area comprises a first sub-display area overlapped with the first display area in the direction vertical to the light-emitting surface of the first display panel and a second sub-display area not overlapped with the first display area; the first sub-pixels in the first sub-display area and the second sub-pixels in the first display area are arranged in a one-to-one correspondence mode; in the display stage, the second sub-pixels in the second sub-display area in the second display panel keep normally black display or non-display.
In a third aspect, the present invention provides a driving method of a display module, including: measuring the number and the position of second sub-pixels in the second sub-display area; in the display stage, controlling the driving signals of the second sub-pixels in the first sub-display area in the second display panel to be synchronous with the driving signals of the first sub-pixels in the first display panel; the second sub-pixels in the second sub-display area in the second display panel keep normally black or not displaying.
In a fourth aspect, the present invention provides a display device, including the display module provided in the present invention.
Compared with the prior art, the display module, the manufacturing method thereof, the driving method thereof and the display device provided by the invention at least realize the following beneficial effects:
in the display module provided by the invention, the length of the first display area along the first direction is L1, the width of the first display area along the second direction is D1, the length of the second display area along the first direction is L2, and the width of the second display area along the second direction is D2; l2 is greater than L1 is greater than 0, D2 is greater than D1 is greater than 0, the area of the second display area in the second display panel is greater than the area of the first display area in the first display panel, even if the first display panel and the second display panel are in alignment fitting, the vertical projection of the first display area on the light-emitting surface of the first display panel in the display module can be positioned in the vertical projection of the second display area on the light-emitting surface of the first display panel even if alignment deviation exists, and the problems of low image display quality and low yield of the process caused by the alignment deviation existing in the alignment fitting of the first display panel and the second display panel in the display module are effectively solved. In the direction perpendicular to the light emitting surface of the first display panel, the area, which is not overlapped with the first display area, in the second display area is a second sub-display area, and in the display stage, second sub-pixels in the second sub-display area in the second display panel keep normally black display or non-display, so that the display effect of the second sub-display area and the observation effect of the second non-display area tend to be consistent, and the display effect of the display module is further improved.
Of course, it is not necessary for any product in which the present invention is practiced to specifically achieve all of the above-described technical effects simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic plan view of a display module according to the present invention;
FIG. 2 is a schematic plan view of a second display panel of the display module shown in FIG. 1;
FIG. 3 is a schematic cross-sectional view of the display module shown in FIG. 1 along A-A';
FIG. 4 is a schematic cross-sectional view of the display module shown in FIG. 1 along A-A';
FIG. 5 is a schematic cross-sectional view of the display module shown in FIG. 1 along A-A';
FIG. 6 is a schematic flow chart illustrating a method for fabricating a display module according to the present invention;
FIG. 7 is a partial flowchart illustrating a step 403 in the method for manufacturing the display module shown in FIG. 6;
fig. 8 is a schematic structural diagram of a display device according to the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Fig. 1 is a schematic plan view of a display module according to the present invention, fig. 2 is a schematic plan view of a second display panel in the display module shown in fig. 1, fig. 3 is a schematic sectional view of the display module shown in fig. 1 along a-a', and referring to fig. 1-3, the present embodiment provides a display module including: the display panel comprises a first display panel 100 and a second display panel 200 which are arranged corresponding to each other, wherein the first display panel 100 is positioned on a light emergent surface of the second display panel 200;
the first display panel 100 includes a first display area AA1 and a first non-display area NA1 surrounding the first display area AA1, the first display area AA1 includes a plurality of first sub-pixels 110 arranged in an array, a plurality of first gate lines G1 extending along a first direction X, and a plurality of first data lines S1 extending along a second direction Y, two adjacent first data lines S1 and two adjacent first gate lines G1 enclose one first sub-pixel 110, wherein the first direction X intersects the second direction Y;
the second display panel 200 includes a second display area AA2 and a second non-display area NA2 surrounding the second display area AA2, the second display area AA2 includes a plurality of second sub-pixels 210 arranged in an array, a plurality of second gate lines G2 extending along the first direction X, and a plurality of second data lines S2 extending along the second direction Y, and two adjacent second data lines S2 and two adjacent second gate lines G2 enclose one second sub-pixel 210;
the second display area AA2 includes a first sub-display area AA21 and a second sub-display area AA22, the first sub-display area AA21 and the first display area AA1 overlap each other in a direction perpendicular to the light emitting surface of the first display panel 100, and the second sub-display area AA22 and the first display area AA1 do not overlap each other;
the second sub-pixels 210 in the first sub-display area AA21 and the first sub-pixels 110 in the first display area AA1 are arranged in a one-to-one correspondence;
the length of the first display area AA1 along the first direction X is L1, the width of the first display area AA1 along the second direction Y is D1, the length of the second display area AA2 along the first direction X is L2, and the width of the second display area AA2 along the second direction Y is D2; wherein,
L2＞L1＞0，D2＞D1＞0；
in the display phase, the second sub-pixels 210 in the second sub-display area AA22 in the second display panel 200 remain normally black or not displayed.
Specifically, the display module provided in this embodiment includes a first display panel 100 and a second display panel 200 that are disposed correspondingly to each other. The first display panel 100 includes a first display area AA1 and a first non-display area NA1 surrounding the first display area AA1, the first display area AA1 has a display function, and the first non-display area NA1 may be provided with circuit elements, traces, and the like, and does not have the display function. The second display panel 200 includes a second display area AA2 and a second non-display area NA2 surrounding the second display area AA2, the second display area AA2 has a display function, and the second non-display area NA2 may be provided with circuit elements, traces, and the like, and does not have a display function.
In the prior art, the area of the second display area in the second display panel and the area of the first display area in the first display panel are kept consistent, so that the problem that bright and dark edges exist when images are displayed by the double-box liquid crystal display module due to the fact that alignment deviation exists when the first display panel and the second display panel are aligned and attached is solved, and the display effect is poor. In the display module provided in this embodiment, a length of the first display area AA1 along the first direction X is L1, a width of the first display area AA1 along the second direction Y is D1, a length of the second display area AA2 along the first direction X is L2, and a width of the second display area AA2 along the second direction Y is D2; the L2 > L1 > 0, D2 > D1 > 0, the area of the second display area AA2 in the second display panel 200 is larger than the area of the first display area AA1 in the first display panel 100, and even if there is an alignment deviation when the first display panel 100 and the second display panel 200 are aligned and attached, the vertical projection of the first display area AA1 in the display module on the light-emitting surface of the first display panel 100 can be located in the vertical projection of the second display area AA2 on the light-emitting surface of the first display panel 100, so that the problems of low image display quality and low yield caused by the alignment deviation when the first display panel 100 and the second display panel 200 are aligned and attached in the display module are effectively solved.
In the first display panel 100, the first display area AA1 includes a plurality of first sub-pixels 110 arranged in an array. In the second display panel 200, the second display area AA2 includes a plurality of second sub-pixels 210 arranged in an array, and the second display area AA2 includes a first sub-display area AA21 and a second sub-display area AA 22. In a direction perpendicular to the light emitting surface of the first display panel 100, an area of the second display area AA2 overlapping the first display area AA1 is a first sub-display area AA21, the second sub-pixels 210 in the first sub-display area AA21 and the first sub-pixels 110 in the first display area AA1 are arranged in a one-to-one correspondence manner, that is, the number of the second sub-pixels 210 in the first sub-display area AA21 and the number of the first sub-pixels 110 in the first display area AA1 are the same, and in a direction perpendicular to the light emitting surface of the first display panel 100, the second sub-pixels 210 in the first sub-display area AA21 and the corresponding first sub-pixels 110 are overlapped, and in a display phase, a driving signal of the second sub-pixels 210 in the first sub-display area AA21 in the second display panel 200 is controlled to be synchronized with a driving signal of the first sub-pixels 110 in the first display panel 100, so that a display of the dual-cell liquid crystal display module is realized.
In the direction perpendicular to the light emitting surface of the first display panel 100, an area of the second display area AA2 not overlapped with the first display area AA1 is a second sub-display area AA22, and in the display stage, the second sub-pixels 210 in the second sub-display area AA22 in the second display panel 200 are kept displaying normally black or not displaying normally black, so that the display effect of the second sub-display area AA22 and the observation effect of the second non-display area NA2 tend to be consistent, and the display effect of the display module is further improved.
With continuing reference to fig. 1-3, optionally, wherein,
Figure BDA0002145471050000061
Figure BDA0002145471050000062
where M is the deviation precision, h is the length of the second sub-pixel 210 in the first direction X, d is the width of the second sub-pixel 210 in the second direction Y, and Int is the rounding.
In particular, the method comprises the following steps of,
Figure BDA0002145471050000071
according to the deviation accuracy and the length of the second sub-pixel 210 in the first direction X, the length difference between the first display area AA1 and the second display area AA2 in the first direction X is calculated.
Figure BDA0002145471050000072
According to the deviation accuracy and the length of the second sub-pixel 210 in the second direction Y, the length difference between the first display area AA1 and the second display area AA2 in the second direction Y is calculated. Therefore, even under the maximum deviation precision, when the first display panel 100 and the second display panel 200 are aligned and attached, the vertical projection of the first display area AA1 on the light-emitting surface of the first display panel 100 in the display module is located in the vertical projection of the second display area AA2 on the light-emitting surface of the first display panel 100, and the problems of low image display quality and low process yield caused by the alignment deviation existing when the first display panel 100 and the second display panel 200 are aligned and attached in the display module are effectively solved. And the too large design area of the second display area AA2 in the second display panel 200 is avoided, so that the too large design area of the second display panel 200 is avoided, which is not favorable for the narrow frame design of the display device.
With continued reference to fig. 1-3, optionally, the second sub-pixel 210 in the second display area AA2 and the corresponding first sub-pixel 110 are overlapped in a vertical projection on the light exiting surface of the first display panel 100.
Specifically, the second sub-pixels 210 in the first sub-display area AA21 and the first sub-pixels 110 in the first display area AA1 are arranged in a one-to-one correspondence manner, and the vertical projections of the second sub-pixels 210 in the second display area AA2 and the corresponding first sub-pixels 110 on the light-emitting surface of the first display panel 100 are overlapped, that is, the vertical projections of the opening areas and the non-opening areas of the second sub-pixels 210 in the second display area AA2 and the opening areas and the non-opening areas of the corresponding first sub-pixels 110 on the light-emitting surface of the first display panel 100 are overlapped, so that the phenomenon of halo during display caused by the inconsistency between the second sub-pixels 210 in the second display area AA2 and the corresponding first sub-pixels 110 is effectively avoided, and the display effect of the display module is further improved.
Fig. 4 is a schematic cross-sectional structure view of the display module shown in fig. 1 along a-a', referring to fig. 1, fig. 2 and fig. 4, optionally, wherein the first display panel 100 includes a first color film substrate 120, a first array substrate 130 and a first liquid crystal layer 140 disposed between the first color film substrate 120 and the first array substrate 130, the first color film substrate 120 includes a color resist layer 121;
the second display panel 200 includes a second color film substrate 220, a second array substrate 230, and a second liquid crystal layer 240 disposed between the second color film substrate 220 and the second array substrate 230, and the second display panel 200 implements black and white display.
Specifically, the first color filter substrate 120 in the first display panel 100 includes a color resist layer 121, and a color resist is disposed in the color resist layer 121, and exemplarily, the first sub-pixel 110 includes a red sub-pixel, a green sub-pixel, and a blue sub-pixel, so that the first display panel 100 realizes color display. The second display panel 200 realizes black-and-white display, and the second color film substrate 220 in the second display panel 200 is not provided with a color resist layer, which is beneficial to improving the transmittance of light in the second display panel 200 and further improving the display effect of the display module.
With continued reference to fig. 1-3, optionally, the first display panel 100 is an SFT mode liquid crystal display panel, and the second display panel 200 is a TN mode liquid crystal display panel.
It should be noted that, in this embodiment, the first display panel 100 is exemplarily shown to be an SFT mode liquid crystal display panel, and the second display panel 200 is a TN mode liquid crystal display panel, in other embodiments of the present invention, the first display panel 100 and the second display panel 200 may also be other mode liquid crystal display panels, which is not described herein again.
With continued reference to fig. 1-3, optionally, the vertical projection of the first display panel 100 on the light exit surface of the first display panel 100 is located within the vertical projection of the second display panel 200 on the light exit surface of the first display panel 100.
Specifically, when the first display panel 100 and the second display panel 200 are aligned and attached, even if there is an alignment deviation, the vertical projection of the first display panel 100 on the light emitting surface of the first display panel 100 in the display module is located in the vertical projection of the second display panel 200 on the light emitting surface of the first display panel 100, so that the first display panel 100 is prevented from locally extending out of the second display panel 200 when the first display panel 100 and the second display panel 200 are aligned and attached to have a deviation, thereby preventing the edge of the first display panel 100 extending out of the second display panel 200 from being damaged easily due to a large stress when the edge receives an external pressure, and effectively prolonging the service life of the display module.
Fig. 5 is a schematic cross-sectional view of the display module shown in fig. 1 along a-a', and referring to fig. 1, fig. 2 and fig. 5, optionally, the display module further includes a backlight module 300, the second display panel 200 is located at a light-emitting surface of the backlight module 300, the second display panel 200 is located between the first display panel 100 and the backlight module 300, and vertical projections of the second display panel 200 and the backlight module 300 at the light-emitting surface of the first display panel 100 are overlapped.
Specifically, the display module further includes a backlight module 300, the backlight module 300 provides a light source for the display module, the vertical projection of the first display panel 100 on the second display panel 200 is located in the second display panel, and the size of the first display panel 100 is smaller than that of the second display panel, so that when the first display panel 100 and the second display panel 200 are aligned and attached, even if there is an alignment deviation, when the backlight module 300 is subsequently assembled, only the corresponding combination of the backlight module 300 and the second display panel 200 in size needs to be considered, that is, the vertical projections of the second display panel 200 and the backlight module 300 on the light-emitting surface of the first display panel 100 are overlapped, thereby reducing the difficulty in the installation of the backlight module 300.
Fig. 6 is a schematic flow chart of a manufacturing method of a display module according to the present invention, and referring to fig. 6, the present embodiment provides a manufacturing method of a display module, including:
step 401, providing a first display panel, where the first display panel includes a first display area and a first non-display area surrounding the first display area, the first display area includes a plurality of first sub-pixels arranged in an array, a plurality of first gate lines extending along a first direction, and a plurality of first data lines extending along a second direction, two adjacent first data lines and two adjacent first gate lines enclose a first sub-pixel, and the first direction and the second direction intersect;
step 402, providing a second display panel, where the second display panel includes a second display area and a second non-display area surrounding the second display area, the second display area includes a plurality of second sub-pixels arranged in an array, a plurality of second gate lines extending along a first direction, and a plurality of second data lines extending along a second direction, and two adjacent second data lines and two adjacent second gate lines enclose a second sub-pixel;
the length of the first display area along the first direction is L1, the width of the first display area along the second direction is D1, the length of the second display area along the first direction is L2, and the width of the second display area along the second direction is D2, wherein L2 > L1 > 0, and D2 > D1 > 0;
step 403, attaching the first display panel and the second display panel in an aligned manner, where the second display area includes a first sub-display area overlapping with the first display area in a direction perpendicular to the light exit surface of the first display panel, and a second sub-display area not overlapping with the first display area;
the first sub-pixels in the first sub-display area and the second sub-pixels in the first display area are arranged in a one-to-one correspondence mode;
in the display stage, the second sub-pixels in the second sub-display area in the second display panel keep normally black display or non-display.
Specifically, with continued reference to fig. 1-3 and 6, in the manufacturing method of the display module according to this embodiment, the length of the first display area AA1 in the first display panel 100 along the first direction X is L1, the width of the first display area AA1 along the second direction Y is D1, the length of the second display area AA2 in the second display panel 200 along the first direction X is L2, and the width of the second display area AA2 along the second direction Y is D2; the L2 > L1 > 0, D2 > D1 > 0, the area of the second display area AA2 in the second display panel 200 is larger than the area of the first display area AA1 in the first display panel 100, and even if there is an alignment deviation when the first display panel 100 and the second display panel 200 are aligned and attached, the vertical projection of the first display area AA1 in the display module on the light-emitting surface of the first display panel 100 can be located in the vertical projection of the second display area AA2 on the light-emitting surface of the first display panel 100, so that the problems of low image display quality and low yield caused by the alignment deviation when the first display panel 100 and the second display panel 200 are aligned and attached in the display module are effectively solved.
In the display module manufactured by the manufacturing method of the display module provided by this embodiment, in the first display panel 100, in the direction perpendicular to the light emitting surface of the first display panel 100, the overlapping area of the second display area AA2 and the first display area AA1 is the first sub-display area AA21, the second sub-pixels 210 in the first sub-display area AA21 and the first sub-pixels 110 in the first display area AA1 are arranged in a one-to-one correspondence manner, that is, the number of the second sub-pixels 210 in the first sub-display area AA21 is the same as the number of the first sub-pixels 110 in the first display area AA1, and in the direction perpendicular to the light emitting surface of the first display panel 100, the second sub-pixels 210 in the first sub-display area AA21 and the corresponding first sub-pixels 110 are overlapped, and in the display stage, the driving signal of the second sub-pixels 210 in the first sub-display area AA21 in the second display panel 200 is controlled to be kept in synchronization with the driving signal of the first sub-pixels 110 in the first display panel 100, therefore, the display of the double-box liquid crystal display module is realized.
In the direction perpendicular to the light emitting surface of the first display panel 100, an area of the second display area AA2 not overlapped with the first display area AA1 is a second sub-display area AA22, and in the display stage, the second sub-pixels 210 in the second sub-display area AA22 in the second display panel 200 are kept displaying normally black or not displaying normally black, so that the display effect of the second sub-display area AA22 and the observation effect of the second non-display area NA2 tend to be consistent, and the display effect of the display module is further improved.
With continuing reference to fig. 1-3, 6, alternatively, wherein,
Figure BDA0002145471050000101
Figure BDA0002145471050000102
where M is the deviation accuracy, h is the length of the second sub-pixel 210 in the first direction X, and d is the width of the second sub-pixel 210 in the second direction Y.
In particular, the method comprises the following steps of,
Figure BDA0002145471050000111
according to the deviation accuracy and the length of the second sub-pixel 210 in the first direction X, the length difference between the first display area AA1 and the second display area AA2 in the first direction X is calculated.
Figure BDA0002145471050000112
According to the deviation accuracy and the length of the second sub-pixel 210 in the second direction Y, the length difference between the first display area AA1 and the second display area AA2 in the second direction Y is calculated. Therefore, even under the maximum deviation precision, when the first display panel 100 and the second display panel 200 are aligned and attached, the vertical projection of the first display area AA1 on the light-emitting surface of the first display panel 100 in the display module is located in the vertical projection of the second display area AA2 on the light-emitting surface of the first display panel 100, and the problems of low image display quality and low process yield caused by the alignment deviation existing when the first display panel 100 and the second display panel 200 are aligned and attached in the display module are effectively solved. And the too large design area of the second display area AA2 in the second display panel 200 is avoided, so that the too large design area of the second display panel 200 is avoided, which is not favorable for the narrow frame design of the display device.
Fig. 7 is a partial schematic flow chart of step 403 in the manufacturing method of the display module shown in fig. 6, and referring to fig. 7, optionally, the aligning and attaching the first display panel and the second display panel in step 403 includes:
step 501, in a first direction, taking the length of a second sub-pixel in the first direction as a step length, and in a second direction, taking the width of the second sub-pixel in the second direction as a step length, and aligning a first display panel and a second display panel;
step 502, attaching the first display panel and the second display panel.
Specifically, in the first direction, the length of the second sub-pixel in the first direction is used as a step length, in the second direction, the width of the second sub-pixel in the second direction is used as a step length, the first display panel and the second display panel are aligned, so that in the first display panel and the second display panel after being attached, in the direction perpendicular to the light-emitting surface of the first display panel, the second sub-pixel in the first sub-display area is overlapped with the first sub-pixel corresponding to the second sub-pixel, and in the display stage, the driving signal of the second sub-pixel in the first sub-display area is kept synchronous with the driving signal of the first sub-pixel in the first display panel, so that the display of the double-box liquid crystal display module is realized.
With continuing reference to fig. 1-3, the present embodiment provides a driving method of a display module, for driving the display module, including:
measuring the number and position of the second sub-pixels 210 in the second sub-display area AA 22;
in the display phase, the driving signals of the second sub-pixels 210 in the first sub-display area AA21 in the second display panel 200 are controlled to be synchronized with the driving signals of the first sub-pixels 110 in the first display panel 100;
the second sub-pixels 210 in the second sub-display area AA21 in the second display panel 200 remain normally black or not displayed.
Specifically, in the display phase, the driving signal of the second sub-pixel 210 in the first sub-display area AA21 in the second display panel 200 and the driving signal of the first sub-pixel 110 in the first display panel 100 are controlled to be synchronized, and the images displayed in the first sub-display area AA21 in the first display panel 100 and the second display panel 200 are matched, so that the display of the dual-cell lcd module is realized. In the display phase, when the second display panel 200 is a normally black mode liquid crystal display panel, the second sub-pixels 210 in the second sub-display area AA21 in the second display panel 200 are not energized to display; when the second display panel 200 is a normally white mode lcd panel, the second sub-pixel 210 in the second sub-display area AA21 in the second display panel 200 is powered on to keep the display in black, so that the display effect of the second sub-display area AA22 and the observation effect of the second non-display area NA2 tend to be consistent, and the display effect of the display module is further improved.
With continued reference to fig. 1-3, optionally, wherein measuring the number and location of second sub-pixels 210 in second sub-display area AA22 includes:
the first display area AA1 includes a first edge a1, the first edge a1 includes a first sub-edge a11 and a second sub-edge a12 extending along the first direction X, a third sub-edge a13 and a fourth sub-edge a14 extending along the second direction Y, and the first sub-edge a11 and the second sub-edge a12 are oppositely disposed on two sides of the third sub-edge a13 and the fourth sub-edge a14 along the second direction Y;
the second display area AA2 includes a second edge a2, the second edge a2 includes a first edge a21 and a second edge a22 extending along the first direction X, a third edge a23 and a third edge a24 extending along the second direction Y, the first edge a21 and the second edge a22 are oppositely disposed on both sides of the third edge a23 and the third edge a24 along the second direction Y;
the first edge a21 is located on the side of the first display area AA1 near the first sub-edge a11, the number of rows of the second sub-pixels 210 between the first edge a21 and the first sub-edge a11 is N1,
Figure BDA0002145471050000121
where E1 is the distance between the first edge a21 and the first sub-edge a11 in the second direction Y, and d is the width of the second sub-pixel 210 in the second direction Y;
the second edge a22 is located on the side of the first display area AA1 close to the second sub-edge a12, the number of rows of the second sub-pixels 210 between the second edge a22 and the second sub-edge a12 is N2,
Figure BDA0002145471050000131
wherein E2 is the distance between the second sub-edge a12 and the second sub-edge a22 in the second direction Y;
the third sub-edge a23 is located on a side of the first display area AA1 close to the third sub-edge a13, the number of columns of the second sub-pixels 210 located between the third sub-edge a23 and the third sub-edge a13 is N3,
Figure BDA0002145471050000132
wherein E3 is the distance between the third sub-edge a23 and the third sub-edge a13 in the first direction X, and h is the length of the second sub-pixel 210 in the first direction X;
the T-edge A24 is located atOn the side of the first display area AA1 close to the fourth sub-edge a14, the number of columns of the second sub-pixels 210 between the edge a24 and the fourth sub-edge a14 is N4,
Figure BDA0002145471050000133
wherein E4 is the distance between the t-edge a24 and the fourth sub-edge a14 in the first direction X.
It should be noted that this embodiment exemplarily shows that the number and the position of the second sub-pixels 210 in the second sub-display area AA22 are measured through the edge of the first display area AA1 and the edge of the second display area AA2, in other embodiments of the present invention, the number and the position of the second sub-pixels 210 in the second sub-display area AA22 may also be measured through a sensor, for example, a distance sensor is disposed on any display panel, the distance sensor detects a deviation after two liquid crystal panels are attached, and the number and the position of the second sub-pixels 210 are calculated through the deviation, which is not described herein again.
The embodiment of the invention provides a display device, which comprises the display module.
Referring to fig. 8, fig. 8 is a schematic structural diagram of a display device according to the present invention. Fig. 8 provides a display device 1000 including the display module according to any of the above embodiments of the invention. The embodiment of fig. 8 only takes a mobile phone as an example to describe the display device 1000, and it should be understood that the display device provided in the embodiment of the present invention may be other display devices with a display function, such as a computer, a television, a vehicle-mounted display device, and the present invention is not limited thereto. The display device provided in the embodiment of the present invention has the beneficial effects of the display panel provided in the embodiment of the present invention, and specific reference may be made to the specific description of the display panel in each of the above embodiments, which is not repeated herein.
As can be seen from the above embodiments, the display module, the manufacturing method thereof, the driving method thereof, and the display device provided by the invention at least achieve the following beneficial effects:
in the display module provided by the invention, the length of the first display area along the first direction is L1, the width of the first display area along the second direction is D1, the length of the second display area along the first direction is L2, and the width of the second display area along the second direction is D2; l2 is greater than L1 is greater than 0, D2 is greater than D1 is greater than 0, the area of the second display area in the second display panel is greater than the area of the first display area in the first display panel, even if the first display panel and the second display panel are in alignment fitting, the vertical projection of the first display area on the light-emitting surface of the first display panel in the display module can be positioned in the vertical projection of the second display area on the light-emitting surface of the first display panel even if alignment deviation exists, and the problems of low image display quality and low yield of the process caused by the alignment deviation existing in the alignment fitting of the first display panel and the second display panel in the display module are effectively solved. In the direction perpendicular to the light emitting surface of the first display panel, the area, which is not overlapped with the first display area, in the second display area is a second sub-display area, and in the display stage, second sub-pixels in the second sub-display area in the second display panel keep normally black display or non-display, so that the display effect of the second sub-display area and the observation effect of the second non-display area tend to be consistent, and the display effect of the display module is further improved.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims (11)

1. A display module, comprising: the display panel comprises a first display panel and a second display panel which are arranged correspondingly to each other, wherein the first display panel is positioned on a light emergent surface of the second display panel;
the first display panel comprises a first display area and a first non-display area surrounding the first display area, the first display area comprises a plurality of first sub-pixels arranged in an array, a plurality of first gate lines extending along a first direction and a plurality of first data lines extending along a second direction, two adjacent first data lines and two adjacent first gate lines enclose one first sub-pixel, and the first direction and the second direction are intersected;
the second display panel comprises a second display area and a second non-display area surrounding the second display area, the second display area comprises a plurality of second sub-pixels arranged in an array, a plurality of second gate lines extending along the first direction and a plurality of second data lines extending along the second direction, and two adjacent second data lines and two adjacent second gate lines enclose one second sub-pixel;
the second display area comprises a first sub display area and a second sub display area, the first sub display area and the first display area are overlapped in the direction perpendicular to the light emitting surface of the first display panel, and the second sub display area and the first display area are not overlapped;
the second sub-pixels in the first sub-display area and the first sub-pixels in the first display area are arranged in a one-to-one correspondence manner;
a length of the first display region along the first direction is L1, a width of the first display region along the second direction is D1, a length of the second display region along the first direction is L2, and a width of the second display region along the second direction is D2; wherein,
L2＞L1＞0，D2＞D1＞0；
Figure FDA0003263729760000011
Figure FDA0003263729760000012
wherein M is a deviation precision, h is a length of the second sub-pixel in the first direction, d is a width of the second sub-pixel in the second direction, and Int is a rounding;
in the display stage, the second sub-pixels in the second sub-display area in the second display panel keep normally black or not displaying.
2. The display module of claim 1,
and the second sub-pixels in the second display area are overlapped with the first sub-pixels corresponding to the second sub-pixels in the vertical projection of the light-emitting surface of the first display panel.
3. The display module of claim 1,
the first display panel comprises a first color film substrate, a first array substrate and a first liquid crystal layer, wherein the first color film substrate, the first array substrate and the first liquid crystal layer are oppositely arranged, and the first color film substrate comprises a color resistance layer;
the second display panel comprises a second color film substrate, a second array substrate and a second liquid crystal layer, wherein the second color film substrate and the second array substrate are arranged oppositely, the second liquid crystal layer is arranged between the second color film substrate and the second array substrate, and black and white display is realized by the second display panel.
4. The display module of claim 3,
the vertical projection of the first display panel on the light-emitting surface of the first display panel is positioned in the vertical projection of the second display panel on the light-emitting surface of the first display panel.
5. The display module of claim 1,
the first display panel is an SFT mode liquid crystal display panel, and the second display panel is a TN mode liquid crystal display panel.
6. The display module according to claim 4, further comprising a backlight module, wherein the second display panel is disposed on a light emitting surface of the backlight module, the second display panel is disposed between the first display panel and the backlight module, and vertical projections of the second display panel and the backlight module on the light emitting surface of the first display panel are overlapped.
7. A manufacturing method of a display module is characterized by comprising the following steps:
providing a first display panel, wherein the first display panel comprises a first display area and a first non-display area surrounding the first display area, the first display area comprises a plurality of first sub-pixels arranged in an array, a plurality of first gate lines extending along a first direction and a plurality of first data lines extending along a second direction, two adjacent first data lines and two adjacent first gate lines enclose one first sub-pixel, and the first direction and the second direction are intersected;
providing a second display panel, wherein the second display panel comprises a second display area and a second non-display area surrounding the second display area, the second display area comprises a plurality of second sub-pixels arranged in an array, a plurality of second gate lines extending along the first direction and a plurality of second data lines extending along the second direction, and two adjacent second data lines and two adjacent second gate lines enclose one second sub-pixel;
the length of the first display region along the first direction is L1, the width of the first display region along the second direction is D1, the length of the second display region along the first direction is L2, and the width of the second display region along the second direction is D2, wherein L2 > L1 > 0, and D2 > D1 > 0;
Figure FDA0003263729760000031
wherein M is a deviation precision, h is a length of the second sub-pixel in the first direction, and d is a width of the second sub-pixel in the second direction;
aligning and attaching the first display panel and the second display panel, wherein the second display area comprises a first sub-display area overlapped with the first display area in a direction perpendicular to a light-emitting surface of the first display panel, and a second sub-display area not overlapped with the first display area;
the first sub-pixels in the first sub-display area and the second sub-pixels in the first display area are arranged in a one-to-one correspondence manner;
in the display stage, the second sub-pixels in the second sub-display area in the second display panel keep normally black or not displaying.
8. The method for manufacturing a display module according to claim 7,
the counterpoint laminating first display panel with the second display panel includes:
in the first direction, taking the length of the second sub-pixel in the first direction as a step length, and in the second direction, taking the width of the second sub-pixel in the second direction as a step length, and aligning the first display panel and the second display panel;
and attaching the first display panel and the second display panel.
9. A driving method of a display module for driving the display module according to any one of claims 1 to 6, comprising:
measuring the number and the position of the second sub-pixels in the second sub-display area;
in the display stage, controlling the driving signals of the second sub-pixels in the first sub-display area in the second display panel to be synchronous with the driving signals of the first sub-pixels in the first display panel;
and the second sub-pixels in the second sub-display area in the second display panel keep normally black display or not display.
10. The method according to claim 9, wherein the driving method further comprises,
the measuring the number and the position of the second sub-pixels in the second sub-display area comprises:
the first display area comprises a first edge, the first edge comprises a first sub-edge and a second sub-edge extending along a first direction, a third sub-edge and a fourth sub-edge extending along a second direction, and the first sub-edge and the second sub-edge are oppositely arranged on two sides of the third sub-edge and the fourth sub-edge along the second direction;
the second display area comprises a second edge, the second edge comprises a first edge and a second edge extending along the first direction, and a third edge and a fourth edge extending along the second direction, and the first edge and the second edge are oppositely arranged on two sides of the third edge and the fourth edge along the second direction;
the first edge is located on one side of the first display area close to the first sub-edge, the number of rows of the second sub-pixels located between the first edge and the first sub-edge is N1,
Figure FDA0003263729760000041
wherein E1 is the distance between the first edge and the first sub-edge in the second direction, and d is the width of the second sub-pixel in the second direction;
the second edge is located on one side of the first display area close to the second sub-edge, the number of rows of the second sub-pixels located between the second edge and the second sub-edge is N2,
Figure FDA0003263729760000042
wherein E2 is the distance between the second edge and the second sub-edge in the second direction;
the third sub-edge is located on one side of the first display area close to the third sub-edge, the number of columns of the second sub-pixels located between the third sub-edge and the third sub-edge is N3,
Figure FDA0003263729760000043
wherein E3 is the distance between the third sub-edge and the third sub-edge in the first direction, and h is the length of the second sub-pixel in the first direction;
the T edge is positioned on one side of the first display area close to the fourth sub-edge and positioned between the T edge and the fourth sub-edgeThe number of columns of said second sub-pixels between the fourth sub-edges is N4,
Figure FDA0003263729760000044
wherein E4 is the distance between the T-edge and the fourth sub-edge in the first direction.
11. A display device, comprising the display module according to any one of claims 1 to 6.
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