Patent ID: 12236056

DETAILED DESCRIPTION OF EMBODIMENTS

In order to make a purpose, technical schemes and effects of the present application more clear and definite, the present application will be further described in detail with reference to attached drawings and examples. It should be understood that specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

As shown inFIG.1, an embodiment of the present invention provides a touch display module, which includes a touch layer10and a flexible substrate20disposed in different layers; wherein the touch layer10includes a capacitive touch electrode, and the capacitive touch electrode is configured to determine a plane coordinate of a finger or a capacitive pen; and the flexible substrate20includes an electromagnetic touch coil, and the electromagnetic touch coil is configured to determine a plane coordinate of an electromagnetic pen.

Specifically, a film layer structure of the touch display module provided by the embodiment of the present invention includes the touch layer10and the flexible substrate20disposed in different layers, the capacitive touch electrode used for sensing an action of the finger or the capacitive pen to determine the plane coordinate of the finger or the capacitive pen is disposed in the touch layer10, and the electromagnetic touch coil used for sensing an action of the electromagnetic pen to determine the plane coordinate of the electromagnetic pen is disposed in the flexible substrate20. Therefore, by integrating the electromagnetic touch electrode into the touch display module, and placing the electromagnetic touch electrode in the different layer from the capacitive touch electrode, the touch display module is compatible with capacitive touch and electromagnetic touch, and at a same time, the electromagnetic touch and capacitive touch may not interfere with each other. And compared with back mounted electromagnetic induction module in the prior art, a thickness of the touch display module is reduced, and power consumption and manufacturing cost will not be increased.

It should be noted that in order to increase an aperture ratio of the touch display module, materials of the capacitive touch electrode and the electromagnetic touch coil are both transparent indium tin oxide.

As shown inFIG.3, in some embodiments, the capacitive touch electrode includes a first capacitive touch electrode110extending along a first direction and a second capacitive touch electrode120extending along a second direction, and the first direction and the second direction are perpendicular to each other. Wherein one of the first capacitive touch electrode110and the second capacitive touch electrode120is a transmitting electrode, and another one is a receiving electrode.

Specifically, when the first direction is an X direction and the second direction is a Y direction, the touch layer10includes a plurality of patterned first capacitive touch electrodes110disposed along the Y direction and a plurality of second capacitive touch electrodes120disposed along the X direction. The first capacitive touch electrode110and the second capacitive touch electrode120are connected to each other through a plurality of capacitive connection electrodes1001spaced apart. When the touch layer10adopts a mutual-capacitive touch, a mutual capacitance is formed at an intersection of the first capacitive touch electrode110and the second capacitive touch electrode120. When a finger or a capacitive pen touches the touch display module, coupling between the first capacitive touch electrode110and the second capacitive touch electrode120near the mutual capacitance is affected, thereby changing a capacitance value of the mutual capacitance. When the capacitance value of the mutual capacitance is detected, the first capacitive touch electrode110can be used as the transmitting electrode to output an excitation signal, and the second capacitive touch electrode120can be used as the receiving electrode to receive the signal. In this way, the capacitance value of the mutual capacitance can be obtained, so as to determine the plane coordinate of the finger or a touch point of the capacitive pen.

It should be noted that the touch layer10of the embodiment of the present invention can also adopt a self-capacitive touch, that is, the capacitive touch electrode is grounded to detect an amount of change in capacitance of the first capacitive touch electrode110and the second capacitive touch electrode120, respectively, so as to determine an X coordinate and a Y coordinate of the touch point, respectively, and finally determine the plane coordinate of the touch point.

As shown inFIG.4, in some embodiments, the electromagnetic touch coil includes a first electromagnetic touch coil200extending along the first direction and forming a loop and a second electromagnetic touch coil210extending along the second direction and forming a loop, and the first direction and the second direction are perpendicular to each other; wherein one of the first electromagnetic touch coil200and the second electromagnetic touch coil210is a transmitting coil, and another one is a receiving coil.

Specifically, when the first direction is the X direction and the second direction is the Y direction, the flexible substrate20includes a plurality of patterned first electromagnetic touch coils200extending along the X direction and forming a loop and a plurality of second electromagnetic touch coils210extending along the Y direction and forming a loop, that is, each of the first electromagnetic touch coils200includes two first electromagnetic touch electrodes2001disposed in the X direction and a first electromagnetic connection electrode2002disposed in the Y direction used for connecting the two first electromagnetic touch electrodes2001, and each of the second electromagnetic touch coil210includes two second electromagnetic touch electrodes2101disposed along the Y direction and a second electromagnetic connection electrode2102disposed along the X direction used for connecting the two second electromagnetic touch electrodes2101. Wherein the first electromagnetic touch coil200and the second electromagnetic touch coil210are insulated from each other, and the first electromagnetic touch coil200can be used as the transmitting electrode to output an excitation signal, and the second electromagnetic touch coil210can be used as the receiving coil to receive the signal. In this way, the plane coordinate of the electromagnetic pen can be determined through electromagnetic induction signals among the first electromagnetic touch coil200, the second electromagnetic touch coil210, and the electromagnetic pen.

Further, as shown inFIG.2, in some embodiments, the touch display module further includes a packaging layer30and a light emitting layer40disposed between the touch layer10and the flexible substrate20, wherein the packaging layer30is disposed on a side of the touch layer10close to the flexible substrate20, and the light emitting layer40is disposed on a side of the flexible substrate20close to the touch layer10.

In addition, the touch display module further includes an upper polarizer60, a liquid optical adhesive70, and a cover80sequentially disposed above the touch layer10, and an ultra-clean foam composite film50disposed below the flexible substrate20. Wherein the cover80and the upper polarizer60are attached with each other through the liquid optical adhesive70, and the ultra-clean foam composite film50can play a buffer effect on stresses acting on the touch display module and dissipate heat generated during an operation of the touch display module, which has a certain protective effect on the touch display module.

Further, as shown inFIG.5toFIG.9, in some embodiments, the flexible substrate20includes a first flexible substrate layer201and a second flexible substrate layer202disposed in different layers; the first electromagnetic touch coil200and the second electromagnetic touch coil210are disposed in the first flexible substrate layer201and the second flexible substrate layer202, respectively; or, the first electromagnetic touch coil200and the second electromagnetic touch coil210are both disposed in the first flexible substrate layer201or the second flexible substrate layer202.

Specifically, the first electromagnetic touch coil200and the second electromagnetic touch coil210can be disposed in different layers or in a same layer, that is, when the flexible substrate20includes the first flexible substrate layer201and the second flexible substrate layer202disposed in different layers, as shown inFIG.5orFIG.6, the first electromagnetic touch coil200and the second electromagnetic touch coil210can be disposed in one layer of the first flexible substrate layer201and the second flexible substrate layer202, respectively, or, as shown inFIG.7orFIG.8, the first electromagnetic touch coil200and the second electromagnetic touch coil210can be both disposed in the first flexible substrate layer201or the second flexible substrate layer202.

It should be noted that the first flexible substrate layer201and the second flexible substrate layer202are insulated from each other, so that when the first electromagnetic touch coil200and the second electromagnetic touch coil210are disposed in one of the first flexible substrate layer201and the second flexible substrate layer202, respectively, the first electromagnetic touch coil200and the second electromagnetic touch coil210can be insulated from each other.

It should also be noted that when the first electromagnetic touch coil200and the second electromagnetic touch coil210are disposed in the same layer, in order to ensure a mutual insulation between the first electromagnetic touch coil200and the second electromagnetic touch coil210, a metal bridge230needs to be disposed at an intersection of the first electromagnetic touch coil200and the second electromagnetic touch coil210, and the metal bridge230is disposed in a different layer from the first electromagnetic touch coil200and the second electromagnetic touch coil210, and is configured to bridge the first electromagnetic touch coil200and the second electromagnetic touch coil210.

Based on this, as shown inFIG.7, the first electromagnetic touch coil200and the second electromagnetic touch coil210are both disposed in the first flexible substrate layer201, and the metal bridge230is disposed in the second flexible substrate layer202, or as shown inFIG.8, the first electromagnetic touch coil200and the second electromagnetic touch coil210are both disposed in the second flexible substrate layer202, and the metal bridge230is disposed in the first flexible substrate layer201.

In some embodiments, the flexible substrate20also includes a bottom shielding metal layer203disposed in a different layer from the first flexible substrate layer201and the second flexible substrate layer202, and the metal bridge230can also be disposed in the bottom shielding metal layer203; the first electromagnetic touch coil200and the second electromagnetic touch coil210are both disposed in the first flexible substrate layer201or the second flexible substrate layer202, and the metal bridge230is disposed in the bottom shielding metal layer203.

It should be noted that due to a limited space of the bottom shielding metal layer203, it is only suitable for disposing metal bridges and not suitable for disposing electromagnetic touch coils with complex patterns. As shown inFIG.9, when the metal bridge230is disposed in the bottom shielding metal layer203and the second flexible substrate layer202is disposed between the bottom shielding metal layer203and the first flexible substrate layer201, if the first electromagnetic touch coil200and the second electromagnetic touch coil210are jointly disposed in the first flexible substrate layer201, then the metal bridge230needs to cross the second flexible substrate layer202to connect with the first electromagnetic touch coil200and the second electromagnetic touch coil210disposed in the first flexible substrate layer201, resulting in a large spacing between the metal bridge230and the electromagnetic touch coils, so that an insulation between the first electromagnetic touch coil200and the second electromagnetic touch coil210easily fails. Therefore, when the metal bridge230is disposed in the bottom shielding metal layer203, and the second flexible substrate layer202is disposed between the bottom shielding metal layer203and the first flexible substrate layer201, it is better for the first electromagnetic touch coil200and the second electromagnetic touch coil210to be jointly disposed in the second flexible substrate layer202. At this time, a spacing between the metal bridge230and the first electromagnetic touch coil200and a spacing between the metal bridge230and the second electromagnetic touch coil210are both small, so as to ensure a good insulation between the first electromagnetic touch coil200and the second electromagnetic touch coil210. That is, when the metal bridge230is disposed in the bottom shielding metal layer203, the first electromagnetic touch coil200and the second electromagnetic touch coil210are preferably disposed in a flexible substrate layer close to the bottom shielding metal layer203.

Further, as shown inFIG.5toFIG.9, in the embodiment of the present invention, a first spacer layer204is further disposed between the first flexible substrate layer201and the second flexible substrate layer202, a photoresist layer205is further disposed between the first flexible substrate layer201and the bottom shielding metal layer203, and a second spacer layer206is further disposed above the bottom shielding metal layer203.

Based on the above embodiment, the electromagnetic touch coils and the metal bridge are made of corresponding masks. When the first electromagnetic touch coil200and the second electromagnetic touch coil210are disposed in the first flexible substrate layer201and the second flexible substrate layer202, respectively, the first electromagnetic touch coil200and the second electromagnetic touch coil210are prepared by two different masks; when the first electromagnetic touch coil200and the second electromagnetic touch coil210are both disposed in the first flexible substrate layer201or the second flexible substrate layer202, the first electromagnetic touch coil200and the second electromagnetic touch coil210are prepared by a same mask, and the metal bridge230is prepared by another mask.

Based on the above embodiments, an embodiment of the present invention also provides a touch display device, which includes the touch display module described above. Wherein the touch display device has a same structure and same beneficial effects as the touch display module; since the above embodiments have described the touch display module in detail, they will not be repeated here.

It can be understood that for those skilled in the art, equivalent replacement or changes can be made according to the technical scheme of the application and its inventive concept, and all these changes or replacements should belong to the protection scope of the claims attached to the application.