WO2014036736A1

WO2014036736A1 - Large-size display screen and manufacturing method therefor

Info

Publication number: WO2014036736A1
Application number: PCT/CN2012/081186
Authority: WO
Inventors: 余晓军; 魏鹏; 刘自鸿
Original assignee: 深圳市柔宇科技有限公司
Priority date: 2012-09-10
Filing date: 2012-09-10
Publication date: 2014-03-13
Also published as: CN103797531A

Abstract

A large-size display screen and a manufacturing method therefor. The display screen comprises a display front panel (1) and a TFT substrate (2) that overlap each other. A support plate (3) is disposed on a side, opposite the display front panel (1), of the TFT substrate (2). The TFT substrate (2) is tiled by multiple TFT substrate units (21) and is borne and fixed by the support plate (3). The display front panel (1) and the support plate (3) are in a monomer structure. The large-size display panel avoids tiling gaps caused by display screen borders or adhesive and sealant limitations during direct tiled display. The yield of tiled large-size TFT substrates is much higher than one-piece TFT substrates that have the same size and are directly manufactured, thereby greatly improving the production efficiency of large-size display screens and reducing costs. In addition, compared with the structure in which tiling gaps are eliminated by using an optical system, the large-size display panel reduces cost and increases the yield.

Description

Large-size display screen and manufacturing method thereof

Technical field

The invention belongs to the technical field of display, and in particular relates to a large-sized display screen and a manufacturing method thereof.

Background technique

At present, in the field of display technology, the demand for large-screen display is increasing day by day, in various display technologies such as thin film transistor liquid crystal display (TFT-LCD), active drive organic electroluminescence (AMOLED), etc., due to limitations The yield of the size TFT array makes the size of the display screen difficult to enlarge, the yield of the display screen decreases exponentially with respect to size, and the material and operating costs increase due to the increase in equipment cost and low yield of the TFT array, resulting in manufacturing The cost increases exponentially with respect to display size. Therefore, low-cost, high-yield large-screen displays are still difficult to achieve, thus affecting the development and application of high-performance, large-screen display technology in conference rooms, home theater, outdoor advertising and other fields.

In order to solve the problem of the size of the display screen, the prior art mostly adopts the multi-screen splicing technology, which mainly includes two types: the first one, directly splicing multiple display screens of the ultra-narrow bezel, which is common in the display wall, but due to the display frame The existence of the "seamless" splicing can not be realized, the smallest splicing gap of the large-size LCD screen is still greater than 5 Mm; the second, directly splicing the unpackaged liquid crystal display unit, and then uniformly encapsulating the front and support plates, but the size of the display is limited by the limitation of the liquid crystal panel sealant, and still cannot be seamlessly spliced. Moreover, the splicing method requires grinding the splicing surface of the liquid crystal panel, which is technically difficult and has high production cost.

In order to overcome the splicing gap in the above method, the prior art uses an optical lens array to enlarge an image to a framing screen frame area for seamless display, and the large use and precise alignment of the optical lens increases the manufacturing cost of the display screen. Moreover, the alignment of the optical lens necessarily has an error, which inevitably reduces the yield rate, makes the preparation process of the large-sized display device more complicated, and has low production efficiency and higher cost.

technical problem

The object of the present invention is to provide a large-sized display screen, which aims to solve the problem that the large-size display screen has large splicing gaps, high manufacturing cost, low production efficiency and low yield.

Technical solution

The present invention is achieved in that a large-sized display screen includes a display front panel and a thin film transistor substrate stacked on each other, and a support plate is disposed on a side of the thin film transistor substrate facing away from the display front panel, The thin film transistor substrate is formed by splicing a plurality of thin film transistor substrate units and carried and fixed by the support plate.

Another object of the present invention is to provide a method of manufacturing a large-sized display screen comprising the following steps:

Including the following steps:

Selecting a substrate, preparing a plurality of thin film transistor arrays on the substrate;

Cutting the substrate, and aligning the dicing lines with the edge of the thin film transistor array to be spliced, obtaining a plurality of thin film transistor substrate units each having one of the thin film transistor arrays;

Selecting a support plate on which a plurality of the thin film transistor substrate units are spliced to each other along a cutting surface thereof to form a thin film transistor substrate;

Making a display front panel;

The display front panel and the support plate with the thin film transistor substrate are assembled into a display screen.

Another object of the present invention is to provide a method of manufacturing a large-sized liquid crystal display comprising the following steps:

Forming a lower alignment film on the thin film transistor substrate;

Selecting a transparent front plate, and sequentially providing a filter, a transparent conductive layer and an upper alignment film on a surface of the transparent front plate;

Providing a spacer on the upper alignment film or the lower alignment film;

Assembling the support plate and the transparent front plate to relatively adhere the upper alignment film and the lower alignment film, and inject liquid crystal between the upper alignment film and the lower alignment film;

Separating a transparent polarizer on the outer side of the transparent front plate and the support plate;

Assemble the drive circuit to obtain a liquid crystal display.

It is still another object of the present invention to provide a method for fabricating large-sized active-driven organic electroluminescence ( The AMOLED) display method includes the following steps:

Selecting a substrate, preparing a plurality of thin film transistor arrays on the substrate, and arranging an organic electroluminescent unit on each of the thin film transistor arrays;

Cutting the substrate, and aligning the dicing line with the edge of the thin film transistor array and the organic electroluminescent unit to be spliced, obtaining a plurality of substrate units each having one of the thin film transistor array and an organic electroluminescent unit;

Selecting a supporting plate on which a plurality of the substrate units are spliced along the cutting surface thereof to form a thin film transistor and an organic electroluminescent substrate;

Selecting a transparent front plate, assembling the support plate and the transparent front plate, and bonding the thin film transistor and the organic electroluminescent substrate to the transparent front plate;

The drive circuit is assembled to obtain an active drive organic electroluminescent display.

It is still another object of the present invention to provide a method of fabricating a large-sized active-driven organic electroluminescent display screen comprising the steps of:

Preparing a monolithic organic electroluminescent layer on the thin film transistor substrate;

Selecting a transparent front plate, assembling the thin film transistor substrate with the organic electroluminescent layer and the transparent front plate, so that the organic electroluminescent layer and the transparent front plate are relatively adhered;

Beneficial effect

The thin-film transistor substrate used in the large-size display screen provided by the invention is formed by splicing a plurality of thin film transistor substrate units, and the display front plate and the support plate of the single structure (non-splicing structure) are not directly assembled and assembled as in the conventional method. The display screen can avoid the splicing gap caused by the display frame border or the adhesive glue and the sealant when directly splicing the display screen; and the high-quality thin film transistor substrate has a high yield rate, so that the directly spliced large-size thin film transistor substrate The yield rate is much higher than that of directly manufacturing a single-chip thin-film transistor substrate, so that the present invention can improve the production efficiency of a large-sized display screen and greatly reduce the cost; and, in addition, the conventional structure that uses various optical systems to eliminate the splicing gap. In comparison, the cost is saved, the influence of the lens alignment accuracy on the display effect is avoided, and the yield rate of the large-size splicing screen is improved.

Similarly, by using the method provided by the invention to manufacture a large-sized display screen, on the one hand, the seamless splicing can be realized, on the other hand, the production efficiency and the yield rate can be improved, and the cost is saved, which is suitable for mass production of large-size display screens. .

DRAWINGS

Figure 1 is a cross-sectional view of a large-sized display screen provided by the present invention;

2 is a flow chart showing the manufacture of a large-sized display screen provided by the present invention;

3 is a schematic structural view of a large-size display manufacturing process in accordance with FIG. 2;

4 is a cross-sectional view of a large-size liquid crystal display panel according to a first embodiment of the present invention;

FIG. 5 is a flow chart of manufacturing a large-size liquid crystal display panel according to a first embodiment of the present invention; FIG.

6 is a cross-sectional view of a large-size AMOLED display screen according to a second embodiment of the present invention;

7 is a flow chart showing the manufacture of a large-size AMOLED display screen according to a second embodiment of the present invention;

8 is a cross-sectional view of a large-size AMOLED display screen according to a third embodiment of the present invention;

9 is a flow chart showing the manufacture of a large-size AMOLED display screen according to a third embodiment of the present invention.

Embodiments of the invention

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to FIG. 1 , the large-size display screen provided by the present invention mainly includes a display front panel 1 and a thin film transistor substrate 2 stacked on each other, and a support panel 3 is disposed on a side of the thin film transistor substrate 2 facing away from the display front panel 1 , wherein The thin film transistor substrate 2 is formed by splicing a plurality of thin film transistor substrate units 21 and carried and fixed by the support plate 3.

Further, the display front panel 1 in the large-sized display screen may have various types such as liquid crystal display, organic electroluminescence (OLED) display, and the like. Regardless of the type of display front panel, the light-emitting control unit 11 and a transparent front panel 12 are required, and the light-emitting control unit 11 may include a filter 111 (the liquid crystal display must be configured with a filter, and the OLED display may be based on Actually, it is necessary to configure or not to configure a filter for color and intensity distribution of the light emitted from the light-emitting control unit 11 to output an image. Generally, the filter 111 is attached to the surface of the transparent front plate 12. The filter 111 can be generally made large in size without splicing, but the filter 111 can also be spliced by a plurality of filter units as in the case of the thin film transistor substrate 2 as necessary.

In the present invention, the thin film transistor substrate 2 is a spliced structure, and other components such as the display front plate 1, the support plate 3, and the like are non-spliced structures, that is, a single structure. In this way, a plurality of small-sized thin film transistor substrate units 21 are directly spliced into a thin film transistor substrate 2 of a desired size, and the display front panel 1 and the support panel 3 of a single structure are disposed, instead of directly splicing a complete display screen as in the conventional method. The splicing gap generated by the display frame or the adhesive and the sealant can be effectively avoided when directly splicing the display screen; and the yield of the small-sized thin film transistor substrate is high, so that the large-sized thin film transistor substrate directly spliced has a good yield It is higher than directly manufacturing a single-chip thin-film transistor substrate, so that the invention can improve the production efficiency of a large-sized display screen and greatly reduce the cost; in addition, compared with the conventional structure using various optical systems to eliminate the splicing gap, the saving The cost avoids the influence of the lens alignment accuracy on the display effect, and improves the yield of the large-size splicing screen.

The large size display can be manufactured by the following method, as shown in Figures 2 and 3:

In step S001, a substrate 211 is selected, and a plurality of thin film transistor arrays 212 are prepared on the substrate 211; as shown in the diagram (A) in FIG.

In this step, the thin film transistor array 212 of the corresponding size is prepared according to the size of the pre-spliced thin film transistor substrate unit 21, and the plurality of thin film transistor arrays 212 are independently attached to the substrate 211.

In step S002, the substrate 211 is cut, and the dicing lines are aligned with the edges of the thin film transistor array 212 to be spliced, and a plurality of thin film transistor substrate units 21 each having a thin film transistor array 212 are obtained; as shown in FIG. B).

In this step, the substrate 211 is cut along the edge of the thin film transistor array 212 to be spliced by the dicing apparatus, and each of the obtained thin film transistor substrate units 21 is provided with a thin film transistor array 212.

Preferably, the cutting device can select a laser cutting machine, and the laser cutting method can achieve the cutting precision of the order of micrometers without polishing, and the high-precision cutting surface will become the subsequent mosaic surface. In step S003, a support plate 3 is selected, and a plurality of thin film transistor substrate units 21 are spliced to each other along the cutting surface thereof on the support plate 3 to form a thin film transistor substrate 2; as shown in the diagram (C) in FIG.

In this step, the plurality of thin film transistor substrate units 21 can be spliced according to the actual required size, and the size of the spliced thin film transistor substrate 2 can meet the needs of a large-sized display screen.

In step S004, the display front panel 1 is made;

In step S005, the display front panel 1 and the support plate 3 with the thin film transistor substrate 2 are assembled into a display screen. Figure 1.

In this step, after the front plate 1 and the support plate 3 with the thin film transistor substrate 2 are assembled, the display screen of a desired size can be cut by a suitable cutting process.

It can be understood that the order of the display front panel 1 and the fabrication of the large-sized thin film transistor substrate 2 may not be strictly limited, and the fabrication of the front panel 1 may be performed simultaneously or at the same time as the fabrication of the thin film transistor substrate 2, as long as step S001~ The method of 003 fabricates the thin film transistor substrate 2, which shows that the acquisition of the front plate 1 and its combination with the thin film transistor substrate 2 are not strictly limited.

The above method obtains the large-sized thin film transistor substrate 2 by splicing the thin film transistor substrate unit 21, thereby avoiding direct splicing of the small-sized display screen, thereby avoiding the splicing gap caused by the display frame border or the adhesive glue and the sealant; The method only needs to splicing the thin film transistor substrate unit 21, which is easier to implement than the process of directly splicing the display screen, and has high production efficiency; in addition, the yield is higher than the conventional method of eliminating the splicing gap by using the lens, and Reduced costs.

It can be understood that the display mode of the large-size display screen is various. When the liquid crystal display is used, the core structure of the light-emitting control unit 11 is a liquid crystal layer. When the OLED display is used, the core structure of the light-emitting control unit 11 is an OLED light-emitting layer. The above two types of display screens are further described in detail below in conjunction with specific embodiments:

Embodiment 1:

Fig. 4 is a cross-sectional view showing a large-sized display screen according to a first embodiment of the present invention, and for convenience of explanation, only parts related to the present embodiment are shown.

The large-sized display panel includes a display front panel 1 and a thin film transistor substrate 2 which are laminated on each other, and the thin film transistor substrate 2 is formed by splicing a plurality of thin film transistor substrate units 21 and carried and fixed by a support plate 3. The display front panel 1 adopts a liquid crystal display front panel, and includes a light-emitting control unit 11 composed of a filter 111, a lower alignment film 112, a liquid crystal layer 113, an upper alignment film 114, and a transparent conductive layer 115, on the light-emitting side of the light-emitting control unit 11. A transparent front plate 12 is provided, and the filter 111 is attached to the light incident side of the transparent front plate 12. Further, an upper polarizer 4 is provided on the light-emitting side of the transparent front plate 12, and a lower polarizer 5 is provided on the back of the support plate 3. Therefore, the large-size display screen sequentially includes, in the direction of the image output, a lower polarizer-support plate-thin film transistor substrate-lower alignment film-liquid crystal layer-upward alignment film-transparent conductive layer-filter-transparent front plate- Upper polarizer. As described above, the filter 111 can also be formed by splicing a plurality of filter units.

The large-size liquid crystal display provided by the embodiment splices a plurality of small-sized thin film transistor substrate units into a thin film transistor substrate of a desired size, and then assembled into a large-sized display with a liquid crystal display front plate and a support plate of a single structure. The screen avoids the splicing gap generated by the adhesive of the liquid crystal panel when directly splicing the liquid crystal display; and directly splicing the small-sized thin film transistor substrate unit has a higher yield rate than directly preparing the single-thickness thin film transistor substrate of the same size, and further The yield and production efficiency of the large-size liquid crystal display are improved, and the cost is reduced. In addition, the problem of low yield rate caused by low alignment accuracy of the optical lens when the optical system is used to eliminate the splicing gap is also solved.

The following provides a method of manufacturing a large-size liquid crystal display, as shown in FIG. 5:

In step S101, a substrate is selected, and a plurality of thin film transistor arrays are prepared on the substrate;

In step S102, the substrate is cut, and the dicing line is aligned with the edge of the thin film transistor array to be spliced, and a plurality of thin film transistor substrate units each having a thin film transistor array are obtained;

In step S103, a support plate is selected, and a plurality of thin film transistor substrate units are spliced to each other along the cutting surface thereof on the support plate to form a thin film transistor substrate;

In this step, the substrate is preferably cut along the edge of the thin film transistor array to be spliced by a laser cutter without polishing, and the high-precision cutting surface is used as a subsequent splicing surface.

In this embodiment, after steps S101-103, a support plate with a thin film transistor substrate of a desired size can be prepared, which is used to carry and fix the spliced thin film transistor substrate on the one hand, and is also used for assembly on the other hand. The support plate of the rear display.

In step S104, preparing a lower alignment film on the thin film transistor substrate;

In step S105, a transparent front plate is selected, and a filter, a transparent conductive layer and an upper alignment film are sequentially disposed on a surface of the transparent front plate;

In step S106, a spacer is disposed on the upper alignment film or the lower alignment film;

In step S107, the support plate and the transparent front plate are assembled, the upper alignment film and the lower alignment film are relatively bonded, and the liquid crystal is poured between the upward alignment film and the lower alignment film;

In step S108, a polarizer is disposed on each of the transparent front plate and the support plate;

In step S109, the driving circuit is assembled to obtain a liquid crystal display.

After the steps S104-108, the preparation of the liquid crystal display front panel is completed, and finally, after step S109, a large-size liquid crystal display panel can be obtained. Wherein, the transparent front plate for fixing the filter can be used for the front plate of the display screen, and the transparent front plate and the support plate have a protective effect on the structure between the two.

In this embodiment, the large-size liquid crystal display shown in FIG. 3 can be obtained by the above method, which realizes seamless splicing, and achieves the advantages of high yield, high yield, and low cost.

Embodiment 2:

Fig. 6 is a cross-sectional view showing a large-sized display screen (AMOLED display panel) according to a second embodiment of the present invention, and for convenience of explanation, only parts related to the present embodiment are shown.

The large-size AMOLED display panel includes a display front panel 1 and a thin film transistor substrate 2 which are superposed on each other. The thin film transistor substrate 2 is formed by splicing a plurality of thin film transistor substrate units 21 and carried and fixed by a support plate 3. The display front panel 1 uses an OLED display front panel, and includes a light-emitting control unit 11 including an OLED light-emitting layer 112 and a transparent front panel 12 disposed on the light-emitting side of the OLED light-emitting layer 112. When the light emitted by the OLED light-emitting layer is white light, At this time, it is also necessary to provide a filter 111 on the light incident side of the transparent front plate 12. As described above, the filter 111 can also be formed by splicing a plurality of filter units.

The OLED light emitting layer 112 is formed by splicing a plurality of OLED light emitting units 1121. The OLED light emitting layer 112 and the thin film transistor substrate 2 are formed in the same cutting and splicing process, and the OLED light emitting unit 1121 and the thin film transistor substrate unit 21 are formed one by one. Registration setting. Further, a protective film 113 may be provided on the light-emitting side of the OLED light-emitting layer 112 and on the light-incident side of the transparent front plate 12. The large-sized OLED display screen includes, in order of the image output direction, a support plate 3 - a thin film transistor substrate 2 - an OLED light emitting layer 112 - a protective film 113 - a filter 111 (optional) - a transparent front plate 12.

The large-size AMOLED display panel provided in this embodiment splices a plurality of thin film transistor substrate units 21 and OLED light emitting units 1121 into a thin film transistor and an OLED substrate of a desired size, and a transparent front plate 12 and a support plate 3 of a single structure. Combined, assembled into a large-sized display screen, avoiding the splicing gap generated by the display frame when directly splicing the display screen; and splicing small-sized thin film transistors and OLED substrates compared with the splicing display or the optical system at the splicing The yield is higher, the splicing precision is easier to control, and the production efficiency and yield are effectively improved, and the cost is reduced.

The following provides a method of manufacturing a large-sized AMOLED display screen, as shown in FIG. 7:

In step S201, a substrate is selected, a plurality of thin film transistor arrays are prepared on the substrate, and an OLED light emitting unit is disposed on each of the thin film transistor arrays;

In step S202, the substrate is cut, and the cutting line is aligned with the edge of the thin film transistor array and the OLED light emitting unit to be spliced, and a plurality of substrate units each having one of the thin film transistor array and one OLED light emitting unit are obtained;

In step S203, a support plate is selected, and a plurality of substrate units are spliced together along the cutting surface thereof on the support plate to form a thin film transistor and an OLED substrate;

The thin film transistor and the OLED substrate include the thin film transistor substrate 2 and the OLED light emitting layer 112 described above.

In this step, the substrate is preferably cut by the laser cutting machine along the edge of the thin film transistor array and the OLED light emitting unit to be spliced, without polishing after cutting, and the high-precision cutting surface is used as the subsequent splicing surface.

In step S204, a transparent front plate is selected, and the support plate and the transparent front plate are assembled to make the thin film transistor and the OLED substrate and the transparent front plate relatively close to each other;

In this step, whether or not to set a filter on the surface of the transparent front plate can be selected according to actual needs.

If a filter is provided on the transparent front plate, the thin film transistor and the OLED substrate are brought into close contact with the filter.

In step S205, the driving circuit is assembled to obtain an AMOLED display screen.

In this embodiment, the large-size AMOLED display screen shown in FIG. 6 can be obtained by the above method, thereby avoiding the splicing gap caused by the frame of the display screen when directly splicing the display unit, and achieving high yield, high yield and low cost. the goal of.

Embodiment 3:

Fig. 8 is a cross-sectional view showing a large-sized display screen (AMOLED display panel) according to a third embodiment of the present invention, and for convenience of explanation, only parts related to the present embodiment are shown.

The display panel includes a display front panel 1 and a thin film transistor substrate 2 which are superposed on each other. The thin film transistor substrate 2 is formed by splicing a plurality of thin film transistor substrate units 21 and carried and fixed by a support plate 3. The display front panel 1 still uses the OLED display front panel, and includes the light-emitting control unit 11 - the OLED light-emitting layer 112, and the transparent front panel 12 disposed on the light-emitting side of the OLED light-emitting layer 112. When the light emitted by the OLED light-emitting layer is white light, It is also necessary to provide a filter 111 on the light incident side of the transparent front plate.

Different from the second embodiment, the OLED light-emitting layer is a single-layer light-emitting layer formed on the thin film transistor substrate 2, and does not need to be cut and formed together with the thin film transistor substrate unit 21. Further, a protective film 113 may be provided on the light-emitting side of the OLED light-emitting layer 112 and on the light-incident side of the transparent front plate 12. The large-sized OLED display screen includes, in order of the image output direction, a support plate 3 - a thin film transistor substrate 2 - an OLED light emitting layer 112 - a protective film 113 - a filter 111 (optional) - a transparent front plate 13.

The large-size AMOLED display panel provided in this embodiment splices a plurality of thin film transistor substrate units 21 into a thin film transistor substrate of a desired size, and is combined with the monolithic OLED light emitting layer 112, the transparent front plate 12, and the support plate 3. The assembly is assembled into a large-sized display screen, which avoids the splicing gap generated by the display frame when directly splicing the display screen; and the yield rate is higher, the splicing precision is more easily controlled, the production efficiency and the yield rate are effectively improved, and the cost is reduced.

The following provides a method of manufacturing a large-sized AMOLED display screen, as shown in FIG. 9:

In step S301, a substrate is selected, and a plurality of thin film transistor arrays are prepared on the substrate;

In step S302, the substrate is cut, and the dicing line is aligned with the edge of the thin film transistor array to be spliced, and a plurality of thin film transistor substrate units each having one of the thin film transistor arrays are obtained;

In step S303, a support plate is selected, and a plurality of thin film transistor substrate units are spliced to each other along the cutting surface thereof on the support plate to form a thin film transistor substrate;

In step S304, preparing a monolithic OLED light-emitting layer on the thin film transistor substrate;

In step S305, a transparent front plate is selected, and the thin film transistor substrate with the OLED light emitting layer and the transparent front plate are assembled to make the OLED light emitting layer and the transparent front plate relatively close to each other;

In step S306, the driving circuit is assembled to obtain an AMOLED display screen.

In this embodiment, the large-size AMOLED display screen shown in FIG. 8 can be obtained by the above method, thereby avoiding the splicing gap caused by the frame of the display screen when directly splicing the display unit, and achieving high yield, high yield and low cost. the goal of.

It can be understood that the above embodiment only discloses a seamless splicing method of the liquid crystal display and the AMOLED display, but the invention is not limited to the liquid crystal display and the AMOLED display, as long as the spliced thin film transistor substrate and other single structural components are assembled. The large size display screens are all within the scope of the present invention.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. Within the scope.

Claims

A large-sized display screen comprising a display front panel and a thin film transistor substrate stacked on each other, and a support plate on a side of the thin film transistor substrate facing away from the display front panel, the thin film transistor substrate The plurality of thin film transistor substrate units are spliced and carried and fixed by the support plate.
The large-size display screen according to claim 1, wherein the display front panel comprises a light-emitting control unit and a transparent front panel which are sequentially disposed from a surface of the thin film transistor substrate.
The large-size display screen according to claim 2, wherein the light-emitting control unit and the transparent front plate are a single-piece light-emitting control unit and a single-chip transparent front plate, respectively.
A large-sized display screen according to claim 2 or 3, wherein said light extraction control unit comprises a liquid crystal display unit.
The large-size display screen according to claim 4, wherein the liquid crystal display unit comprises: a lower alignment film, a liquid crystal layer, an upper alignment film, a transparent conductive layer, and a filter disposed from the surface of the thin film transistor substrate. Light film.
The large-size display screen according to claim 4, wherein an upper polarizer is disposed on a light outgoing side of said transparent front plate, and a lower polarizer is disposed on a back side of said support plate.
The large-size display screen according to claim 2, wherein the light extraction control unit comprises an organic electroluminescent layer;

The organic electroluminescent layer is formed by splicing a plurality of organic electroluminescent units.
A large-sized display screen according to claim 7, wherein said organic electroluminescence unit is disposed in a one-to-one position with said thin film transistor substrate unit.
The large size display screen of claim 2 wherein said light extraction control unit comprises a monolithic organic electroluminescent layer.
The large-sized display panel according to claim 7, 8 or 9, wherein a protective film is provided on the organic electroluminescent layer and on the light incident side of the transparent front plate.
A method of manufacturing a large-sized display screen, comprising the steps of:

Selecting a substrate, preparing a plurality of thin film transistor arrays on the substrate;

Cutting the substrate, and aligning the dicing lines with the edge of the thin film transistor array to be spliced, obtaining a plurality of thin film transistor substrate units each having one of the thin film transistor arrays;

Selecting a support plate on which a plurality of the thin film transistor substrate units are spliced to each other along a cutting surface thereof to form a thin film transistor substrate;

Making a display front panel;

The display front panel and the support plate with the thin film transistor substrate are assembled into a display screen.
A method of manufacturing a large-sized liquid crystal display, comprising the steps of:

Selecting a substrate, preparing a plurality of thin film transistor arrays on the substrate;

Cutting the substrate, and aligning the dicing lines with the edge of the thin film transistor array to be spliced, obtaining a plurality of thin film transistor substrate units each having one of the thin film transistor arrays;

Selecting a support plate on which a plurality of the thin film transistor substrate units are spliced to each other along a cutting surface thereof to form a thin film transistor substrate;

Forming a lower alignment film on the thin film transistor substrate;

Selecting a transparent front plate, and sequentially providing a filter, a transparent conductive layer and an upper alignment film on a surface of the transparent front plate;

Providing a spacer on the upper alignment film or the lower alignment film;

Assembling the support plate and the transparent front plate to relatively adhere the upper alignment film and the lower alignment film, and inject liquid crystal between the upper alignment film and the lower alignment film;

Separating a transparent polarizer on the outer side of the transparent front plate and the support plate;

Assemble the drive circuit to obtain a liquid crystal display.
A method of fabricating a large-sized active-driven organic electroluminescent display screen, comprising the steps of:

Selecting a substrate, preparing a plurality of thin film transistor arrays on the substrate, and arranging an organic electroluminescent unit on each of the thin film transistor arrays;

Cutting the substrate, and aligning the dicing line with the edge of the thin film transistor array and the organic electroluminescent unit to be spliced, obtaining a plurality of substrate units each having one of the thin film transistor array and an organic electroluminescent unit;

Selecting a supporting plate on which a plurality of the substrate units are spliced along the cutting surface thereof to form a thin film transistor and an organic electroluminescent substrate;

Selecting a transparent front plate, assembling the support plate and the transparent front plate, and bonding the thin film transistor and the organic electroluminescent substrate to the transparent front plate;

The drive circuit is assembled to obtain an active drive organic electroluminescent display.
A method of fabricating a large-sized active-driven organic electroluminescent display screen, comprising the steps of:

Selecting a substrate, preparing a plurality of thin film transistor arrays on the substrate;

Cutting the substrate, and aligning the dicing lines with the edge of the thin film transistor array to be spliced, obtaining a plurality of thin film transistor substrate units each having one of the thin film transistor arrays;

Selecting a support plate on which a plurality of the thin film transistor substrate units are spliced to each other along a cutting surface thereof to form a thin film transistor substrate;

Preparing a monolithic organic electroluminescent layer on the thin film transistor substrate;

Selecting a transparent front plate, assembling the thin film transistor substrate with the organic electroluminescent layer and the transparent front plate, so that the organic electroluminescent layer and the transparent front plate are relatively adhered;

The drive circuit is assembled to obtain an active drive organic electroluminescent display.