This application claims the priority benefit of Taiwan application serial no. 101113479, filed on Apr. 16, 2012. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of this specification.
1. Field of the Invention
The invention relates to a display device, and more particularly, to a touch sensing three-dimensional (3D) display device.
2. Description of Related Art
With advancement of display technology and users' demand for multi-functionality of display devices, the conventional display devices that are simply equipped with the display function no longer satisfy users' needs. To provide users with an interactive, user-friendly, easy-to-use, and attractive input interface, facilitate direct use of display devices, and replace additional input devices including keyboards or mice, touch sensing panels are often configured on display panels of the display devices.
Moreover, the existing flat display devices in a normal flat display mode are unable to comply with the requirement for perception of visual realism. Accordingly, 3D display devices have been developed, so that users are allowed to observe stereo images with spatial depth as if they are there. Both the configuration of the touch sensing panel and the application of 3D display technology need be implemented together with the use of a display panel.
At present, integration of the display panel, the touch sensing panel, and the 3D display technology is accomplished by performing an adhesion process twice. For instance, when an auto-stereoscopic display technology is applied to a touch sensing panel, a parallax barrier sheet is adhered to the display panel, and an out-cell touch sensing panel is then attached thereto. Nonetheless, since the adhesion process is performed twice to adhere the parallax barrier sheet, the display panel, and the out-cell touch sensing panel, the overall thickness of the touch sensing 3D display device and the manufacturing costs are apt to increase, and the transmittance of the touch sensing 3D display device is reduced.
The invention is directed to a touch sensing 3D display device having relatively low manufacturing costs.
In an embodiment of the invention, a touch sensing 3D display device that includes a display panel and a touch sensing parallax integrated panel is provided. The touch sensing parallax integrated panel is disposed on the display panel. The touch sensing parallax integrated panel includes a first substrate, a second substrate, a touch sensing structure, a display medium layer, a first parallax electrode layer, and a second parallax electrode layer. The second substrate is disposed opposite to the first substrate. The first substrate is located between the display panel and the second substrate. The touch sensing structure is located on the second substrate. The display medium layer is disposed between the first substrate and the second substrate. The first parallax electrode layer is disposed on the first substrate and located between the display medium layer and the first substrate. The second parallax electrode layer is disposed on the second substrate and located between the display medium layer and the second substrate.
According to an embodiment of the invention, the first parallax electrode layer includes a plurality of bar-shaped electrodes that are separated from and parallel to one another, and the second parallax electrode layer includes a complete electrode layer covering the bar-shaped electrodes.
According to an embodiment of the invention, the touch sensing structure is disposed between the second substrate and the second parallax electrode layer.
According to an embodiment of the invention, the touch sensing parallax integrated panel further includes a first insulation layer. The first insulation layer is disposed between the first parallax electrode layer and the first substrate.
According to an embodiment of the invention, the touch sensing parallax integrated panel further includes a metal circuit layer. The metal circuit layer is electrically connected to the first parallax electrode layer and located between the first insulation layer and the first substrate.
According to an embodiment of the invention, the first insulation layer has a first through hole. The first through hole exposes the metal circuit layer. Besides, the first through hole is filled with the first parallax electrode layer, and the first parallax electrode layer is electrically connected to the metal circuit layer.
According to an embodiment of the invention, the touch sensing parallax integrated panel further includes a second insulation layer. The second insulation layer is disposed between the second parallax electrode layer and the touch sensing structure.
According to an embodiment of the invention, the touch sensing parallax integrated panel further includes a first flexible printed circuit board (PCB). The first flexible PCB is disposed on the second substrate and electrically connected to the touch sensing structure, the first parallax electrode layer, and the second parallax electrode layer.
According to an embodiment of the invention, the touch sensing parallax integrated panel further includes a conductive adhesive. The conductive adhesive is located between the first parallax electrode layer and the second parallax electrode layer. One end of the conductive adhesive is electrically connected to the first parallax electrode layer, and the other end of the conductive adhesive is electrically connected to the second parallax electrode layer and the first flexible PCB.
According to an embodiment of the invention, the touch sensing parallax integrated panel further includes a first integrated driving chip. The first integrated driving chip drives the touch sensing structure, the first parallax electrode layer, and the second parallax electrode layer through the first flexible PCB.
According to an embodiment of the invention, the touch sensing parallax integrated panel further includes a first polarizer. The second substrate is located between the first polarizer and the touch sensing structure.
According to an embodiment of the invention, the second substrate is located between the touch sensing structure and the second parallax electrode layer.
According to an embodiment of the invention, the touch sensing 3D display device further includes a protection board. The touch sensing structure is located between the protection board and the second substrate.
According to an embodiment of the invention, the touch sensing parallax integrated panel further includes a second polarizer. The second polarizer is located between the protection board and the touch sensing structure.
According to an embodiment of the invention, the touch sensing 3D display device further includes a second flexible PCB and a third flexible PCB. The second flexible PCB is electrically connected to the touch sensing structure, and the third flexible PCB is electrically connected to the first parallax electrode layer and the second parallax electrode layer. The second flexible PCB has a first contact. The third flexible PCB has a second contact corresponding to the first contact. The first contact and the second contact are electrically connected to each other.
According to an embodiment of the invention, the touch sensing 3D display device further includes a second integrated driving chip. The second integrated driving chip is connected to the second flexible PCB. Besides, the second integrated driving chip drives the touch sensing structure through the second flexible PCB. In addition, the second integrated driving chip drives the first parallax electrode layer and the second parallax electrode layer through the first contact, the second contact, and the third flexible PCB.
According to an embodiment of the invention, the touch sensing structure includes a plurality of first sensing series electrically insulated from one another and a plurality of second sensing series electrically insulated from one another. The second sensing series and the first sensing series are alternately arranged, and the second sensing series are electrically insulated from the first sensing series.
According to an embodiment of the invention, the touch sensing structure further includes a plurality of insulation patterns. The insulation patterns are at least located at intersections of the first sensing series and the second sensing series.
According to an embodiment of the invention, the display medium layer includes a liquid crystal material layer or an organic electroluminescent layer.
Based on the above, in the touch sensing 3D display device described in an embodiment of the invention, the touch sensing functions and the 3D display functions may be integrated into one touch sensing parallax integrated panel, and an adhesion process is performed to adhere the touch sensing parallax integrated panel and the display panel, so as to implement the touch sensing 3D display device. Hence, in comparison with the conventional touch sensing 3D display device, the touch sensing 3D display device described in an embodiment of the invention is less likely to encounter errors caused by lack of adhesion precision and the number of adhesion processes. Thereby, the costs spent on the adhesion processes may also be reduced.
Other features and advantages of the invention will be further understood from the further technological features disclosed by the embodiments of the invention wherein there are shown and described embodiments of this invention, simply by way of illustration of modes best suited to carry out the invention.
The accompanying drawings are included to provide further understanding, and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments and, together with the description, serve to explain the principles of the invention.
The touch sensing parallax integrated panel 120a includes a first substrate 122, a second substrate 124, a display medium layer 125, a first parallax electrode layer 126, a second parallax electrode layer 127, and a touch sensing structure 128. The second substrate 124 is disposed opposite to the first substrate 122. The first substrate 122 is located between the display panel 110 and the second substrate 124. In the present embodiment, the first substrate 122 and the second substrate 124 may be transparent substrates and may be made of glass, quartz, organic polymer, or any other suitable material.
The touch sensing structure 128 may be located on the second substrate 124. Here, the touch sensing structure 128 may provide a touch sensing function. The display medium layer 125 is disposed between the first substrate 122 and the second substrate 124. According to the present embodiment, the display medium layer 125 is, for instance, a liquid crystal material layer, an organic electroluminescent layer, or any other appropriate medium layer. The first parallax electrode layer 126 and the second parallax electrode layer 127 may be disposed on the first substrate 122 and the second substrate 124, respectively. Specifically, the first parallax electrode layer 126 may be disposed between the display medium layer 125 and the first substrate 122, and the second parallax electrode layer 127 may be disposed between the display medium layer 125 and the second substrate 128. Besides, the first parallax electrode layer 126 and the second parallax electrode layer 127 are preferably made of a transparent conductive material. Here, the transparent conductive material is, for instance, indium tin oxide (ITO), indium zinc oxide (IZO), aluminum tin oxide (ATO), aluminum zinc oxide (AZO), indium germanium zinc oxide (IGZO), any other appropriate oxide, or a stacked layer consisting of at least two of the above-mentioned materials.
The touch sensing parallax integrated panel 120a described herein may further include a first polarizer 129. The polarization light emitted from the display panel 110 described herein may pass or may be shielded by the first polarizer 129 of the touch sensing parallax integrated panel 120a, and thereby the 3D display function can be achieved. According to the present embodiment, the second substrate 124 is located between the first polarizer 129 and the touch sensing structure 128, which should however not be construed as a limitation to the invention. In another embodiment, the first polarizer 129 may be disposed between the second substrate 124 and the touch sensing structure 128 or at any other appropriate location.
To elaborate the relationship among film layers in the touch sensing parallax integrated panel 120a, the structure of the touch sensing parallax integrated panel 120a is described below with reference to
With reference to
According to the present embodiment, the first parallax electrode layer 126 includes a plurality of bar-shaped electrodes 126a which are separated from and parallel to one another, and the second parallax electrode layer 127 may be a complete electrode layer covering the bar-shaped electrodes 126a. In the present embodiment, a method of displaying a stereo image is described below. Different voltages are respectively applied to the first parallax electrode layer 126 and the second parallax electrode layer 127, so as to control the rotation direction of the display media of the display medium layer 125. Thereby, one region of the display medium layer 125 covered by the bar-shaped electrodes 126a can have retardation. By contrast, the other region of the display medium layer 125 not covered by the bar-shaped electrodes 126a does not have retardation. When the polarization light emitted from the display panel 110 passes through the region of the display medium layer 125 covered by the bar-shaped electrodes 126a, the polarization state of the polarization light is changed, and the polarization light is then shielded by the first polarizer 129 (shown in
With reference to
In the present embodiment, the touch sensing parallax integrated panel 120a may include a second insulation layer 204. The second insulation layer 204 may be disposed between the second parallax electrode layer 127 and the touch sensing structure 128, such that the touch sensing structure 128 is electrically insulated from the second parallax electrode layer 127.
Besides, the touch sensing parallax integrated panel 120a described herein may further include a first flexible PCB, a conductive adhesive 220, and a first integrated driving chip 230. It should be mentioned that the function of driving the parallax electrode layers (including the first and second parallax electrode layers 126 and 127) and the function of driving the touch sensing structure 128 may be integrated into the same first integrated driving chip 230 in the touch sensing display device described in the present embodiment, so as to reduce the material costs of the driving chip.
In the present embodiment, the touch sensing structure 128 may be electrically connected to the first integrated driving chip 230 through contact pads 212 and circuits of the first flexible PCB 210. Thereby, the touch sensing structure 128 may be driven by the first integrated driving chip 230. The second parallax electrode layer 127 may be electrically connected to the first flexible PCB 210 through external traces L. After that, the second parallax electrode layer 127 may be electrically connected to the first integrated driving chip 230 through the first flexible PCB 210. The first parallax electrode layer 126 may be electrically connected to the external traces L on the second substrate 124 through a conductive adhesive 220. The external traces L are electrically connected to the first integrated driving chip 230. Hence, the first parallax electrode layer 126 may be electrically connected to the first integrated driving chip 230 through the conductive adhesive 220, the external traces L, and the first flexible PCB 210. As such, the parallax electrode layers (including the first parallax electrode layer 126 and the second parallax electrode layer 127) may be driven by the first integrated driving chip 230.
According to the related art, the integration of the display panel, the touch sensing panel, and the 3D display technology is accomplished by performing an adhesion process twice. By contrast, in the manufacturing process of the touch sensing 3D display device described in the present embodiment, the adhesion process is performed once to adhere the touch sensing parallax integrated panel and the display panel, so as to form the touch sensing 3D display device. Specifically, as indicated in
In the present embodiment, the touch sensing cell 128 is configured in the touch sensing parallax integrated panel (the touch sensing parallax integrated panel has an in-cell touch sensing structure). Since the touch sensing parallax integrated panel described herein is not formed by adhering individual touch sensing panel and 3D display panel, the number of photo masks, substrates, flexible PCBs, or integrated driving chips may be further reduced in the present embodiment, and the space occupied by the touch sensing parallax integrated panel can be reduced as well. Moreover, the decrease in the thickness of the touch sensing parallax integrated panel leads to the reduction of the overall thickness of the touch sensing 3D display device described herein, and thereby transmittance of the touch sensing 3D display device can then be improved.
Besides, it is likely not to form the first insulation layer 202 and the metal circuit layer 206 on the first substrate 122 of the touch sensing parallax integrated panel 120a depicted in
As described herein, the touch sensing parallax integrated panel not only can have an in-cell touch sensing structure but also can have the touch sensing structure configured on an outer surface of the second substrate. Explanations are exemplarily given below with reference to
With reference to
With reference to
With reference to
Besides, the touch sensing 3D display device 200 further includes a second integrated driving chip 530 connected to the third flexible PCB 520. The second integrated driving chip 530 may drive the touch sensing structure 128 through the third flexible PCB 520. In addition, the second integrated driving chip 530 may drive the first parallax electrode layer 126 and the second parallax electrode layer 127 through the first contact D1, the second contact D2, and the second flexible PCB 510. That is, in the touch sensing 3D display device 200, the number of the required driving chips and the material costs can also be reduced by electrically connecting the touch sensing structure 128 to each parallax electrode layer (including the first parallax electrode layer 126 and the second parallax electrode layer 127).
Similar to the manufacturing process of the touch sensing 3D display device 100, in the manufacturing process of the touch sensing 3D display device 200, the touch sensing parallax integrated panel 120c and the display panel 110 may be adhered in an adhesion process to reduce the errors caused by lack of adhesion precision and the number of adhesion processes. Particularly, the touch sensing parallax integrated panel 120c and the display panel 110 are adhered to each other by assembling an alignment pattern X between the second substrate 124 and the second parallax electrode layer 127 to another alignment pattern corresponding to the alignment pattern X.
From another perspective, in the touch sensing 3D display device 200, the first and second parallax electrode layers 126 and 127 and the touch sensing structure 128 are respectively located at two different sides of the second substrate 124. Accordingly, in the manufacturing process of the touch sensing 3D display device 200, the touch signals sensed by the touch sensing structure 128 are prone to be interfered by the signals that drive the first and second parallax electrode layers 126 and 127. Since the touch sensing 3D display devices 200 and 100 have similar effects and advantages, no further descriptions are provided hereinafter.
To sum up, in the touch sensing 3D display device described in an embodiment of the invention, the touch sensing functions and the 3D display functions may be integrated into one touch sensing parallax integrated panel, and an adhesion process is performed once to adhere the touch sensing parallax integrated panel and the display panel, so as to implement the touch sensing 3D display device. Hence, in comparison with the conventional touch sensing 3D display device, the touch sensing 3D display device described in an embodiment of the invention is less likely to encounter errors caused by lack of adhesion precision and the number of adhesion processes. Moreover, the costs spent on adhesion processes may also be reduced.
It will be apparent to those skilled in the art that various modifications and variations can be made to the structure of the invention without departing from the scope or spirit of the invention. In view of the foregoing, it is intended that the invention cover modifications and variations of this invention provided they fall within the scope of the following claims and their equivalents.
Number | Date | Country | Kind |
---|---|---|---|
101113479 | Apr 2012 | TW | national |