FIELD OF INVENTION

The disclosure relates to the flexible display panel technology field, and more particularly, to a flexible integrated display module, manufacturing method thereof, and display device.

BACKGROUND OF INVENTION

Flexible organic light emitting diode (OLED) refers to as flexible organic light-emitting diode. Flexible OLEDs are manufactured based on flexible substrate and operates on flexible substrate. Compared with traditional glass display devices, flexible OLEDs are more flexible, lighter and thinner.

OLED light-emitting devices are currently mainly used in smart phones, household appliances, televisions, smart watches, VR devices, etc., wherein the application ratio in smart phones is highest and reaches 70.6%. The key advantage of OLED light-emitting devices is in their flexibility, which achieves “flexible” display and increases application scenarios and imagination of traditional display device.

Due to the differences with structure, material properties, and luminescence principles between OLED light-emitting devices and TFT-LCD devices, OLED light-emitting devices are more suitable for manufacturing flexible panels. Currently, flexible panels are also widely referred to as curved panels, because they present a fixed curved surface, but that is not truly “flexible”, the display also needs to be supported by glass, which has its insurmountable bending barrier.

“Flexible” panels currently head toward two goals, bendable and foldable, but the final goal is to achieve rollable panel.

Currently, a flexible integrated display module100as shown asFIG. 1, comprising a panel110, a chip on film (COF)120, a display flexible printed circuit board (display FPC)130, and a direct on-cell touch control flexible printed circuit (DOT-TP-FPC, wherein DOT: direct on-cell touch, TP: touch panel)140, wherein the panel mainly is used to display image. An active area101is the area in which the image is displayed in the panel inFIG. 1and is the core component of the display module. The panel further comprises a non-active area102. The COF120is used to provide a signal to drive the panel110display image, an IC of the COF121is used to generate a circuit driving signal on the panel110, and the COF120between the IC of the COF121and the panel110is densely distributed with wirings for conducting signals. The function of the DOT-TP-FPC140is mainly to provide a driving signal to the touch panel integrated on the panel110. The display FPC130connected to the COF120and the flexible printed circuit board for external driving system of the DOT-TP-FPC140, which is mainly to provide a control driving signal to the IC of the COF121and an IC of the DOT-TP-FPC141.

Flexible foldable display modules currently have some disadvantages: first, currently, COF, display FPC and DOT-TP-FPC in flexible folding display modules are mostly produced by external partners, which is difficult to control their quality and cost. Second, flexible folding display modules have complicated structure and many components, for example, flexible printed circuit boards and panels or flexible printed circuit boards and flexible printed circuit boards need to perform bonding process. A total of 4 to 5 process steps are required. The bonding process is prone to laminate offset between the flexible printed circuit board and the panel, and generates particle, poor laminate contact and other poor phenomena. Long flow process is easy to lead to decline overall yield and increase cost. Third, each component is bonding each other by bonding process. The flexible printed circuit board has some hard components such as an IC, and when the flexible display module is manufactured into a foldable product or a rollable product, the IC and the connecting channel between the flexible printed circuit board and the panel is easily damaged.

SUMMARY OF INVENTION

The object of the present disclosure is to provide a flexible integrated display module and manufacturing method thereof and display device, which provides a new design to resolve the disadvantages of flexible display panel. The panel of flexible display, the COF, the display FPC, and the DOT-TP-FPC are integrated on the flexible display substrate, and the different areas of flexible display substrate are defined as an active area for displaying images, a COF wiring functional area, a DOT-TP-FPC wiring functional area, a display FPC wiring functional area, thereby improving integration of foldable bendable flexible displays and yield, and reducing structural complexity, flow process, and overall cost.

According to one of aspect in the present disclosure, the present disclosure provides a flexible integrated display module comprising a flexible integrated display substrate, the flexible integrated display substrate comprises an integrated area, an active area disposed at one side of the integrated area and a non-active area disposed surrounding the active area, and the integrated area divided into a plurality of areas, each of the areas defined as a corresponding functional area. The functional area comprises a display wiring functional area and a plurality of direct on-cell touch control wiring functional areas, the plurality of direct on-cell touch control wiring functional areas disposed on both sides of the display functional area, the display functional area is used to set a display wiring and a chip on film packaging wiring, and the direct on-cell touch control wiring functional areas are used to set a direct on-cell touch control wiring.

Further, the flexible integrated display module further comprises a touch control display driving integrated circuit chip laminated on the integrated area of the flexible integrated display substrate, the touch control display driving integrated circuit chip is used to generate a driving signal for display and touch control circuit of the active area and the non-active area, and provide a driving signal to a touch control panel of the corresponding active area and the non-active area.

Further, the flexible integrated display module further comprises a touch control display driving integrated circuit chip disposed on a flexible printed circuit board for external driving system of the flexible integrated display substrate or an external fixable printed circuit board, the touch control display driving integrated circuit chip is used to generate a driving signal for display and touch control circuit of the active area and the non-active area, and provide a driving signal to a touch control panel of the corresponding active area and the non-active area.

According to other aspects of the present disclosure, the present disclosure provides a manufacturing method of flexible integrated display module comprising steps as below: providing a flexible integrated display substrate; defining an integrated area on the flexible integrated display substrate, dividing the integrated area into a plurality of areas, defining each of the areas as a corresponding functional area; dividing one side of the integrated area on the flexible integrated display substrate into an active area and a non-active area; forming a functional wiring film layer on the corresponding functional area by physical vapor deposition method; performing coating a photoresist, exposure, and development on the functional wiring film layer to make the photoresist patterned; patterning the functional wiring film layer under the photoresist by etching method, and corresponding to the patterned photoresist; and stripping the patterned photoresist.

Further, after the step of stripping the patterned photoresist, further comprising defining a bonding area in the integrated area; cleaning the bonding area; attaching an anisotropic conductive film layer to the bonding area; disposing a touch control display driving integrated circuit chip on the anisotropic conductive film layer by pre-laminating method; and performing main-press to the touch control display driving integrated circuit chip.

Further, after the step of stripping the patterned photoresist, further comprising defining a bonding area on an external driving system printed circuit board of the flexible integrated display substrate; cleaning the bonding area; attaching an anisotropic conductive film layer to the bonding area; disposing a touch control display driving integrated circuit chip on the anisotropic conductive film layer by pre-laminating method; and performing main-press to the touch control display driving integrated circuit chip.

Further, in the step of defining a bonding area, further comprising manufacturing a connector for connecting the flexible integrated display substrate and external driving system printed circuit board by surface assembly technology.

According to other aspect of the present disclosure, the present disclosure provides a display device comprises a flexible integrated display module above mentioned.

The advantage of the present disclosure is that, a flexible integrated display module provides a new design to resolve the disadvantages of flexible display panel. The panel of flexible display, the COF, the display FPC, and the DOT-TP-FPC are integrated on the flexible display substrate, and the different areas of flexible display substrate are defined as an active area for displaying images, a COF wiring functional area, a DOT-TP-FPC wiring functional area, a display FPC wiring functional area, thereby improving integration of foldable bendable flexible displays and yield, and reducing structural complexity, flow process, and overall cost.

