TWI510986B - Touch display panel - Google Patents

Description

Touch display panel

The invention relates to a touch display panel.

A touch electrode structure that implements a touch function on a conventional touch display panel is generally stacked with a light shielding pattern layer. A plurality of grid-shaped touch pads are disposed on the touch electrode structure. The grid lines in the grid-shaped touch pad generally have the same arrangement direction and similar arrangement density as the grid lines in the light-shielding pattern layer, so that the visual effect of the moiré is easily generated by mutual interference, which is commonly known in the industry. Moire Pattern. The Moire phenomenon seriously affects the visual effect of the touch display panel.

In view of this, it is necessary to provide a touch display panel that can eliminate the Moire phenomenon.

A touch display panel includes a first substrate, a second substrate, a display medium layer disposed between the first substrate and the second substrate, and a light shielding pattern layer disposed on the first substrate or the second substrate, and a second Touch electrode structure on the substrate. The light shielding pattern layer includes a plurality of crisscross pattern lines to separate the plurality of pixels. The touch electrode structure includes a plurality of touch pads. The touch pad includes a frame and a plurality of criss-crossing sensing lines disposed in the frame. The bezel is disposed parallel to the pattern line. The sensing line forms an angle with the frame that is greater than zero degrees.

Compared with the prior art, the touch pad pattern provided by the present invention sets the sensing line whose spatial frequency is close to the pattern line of the light shielding pattern layer to intersect the pattern line, thereby clearly The Moire phenomenon caused by mutual interference between the sensing lines and the pattern lines of the light-shielding pattern layer is reduced, and the visual effect of the touch display panel is improved.

1, 2‧‧‧ touch display panel

10‧‧‧First substrate

12‧‧‧second substrate

14‧‧‧Lighting pattern layer

16‧‧‧Touch electrode structure

18‧‧‧ Display media layer

140‧‧‧ pattern line

142‧‧ ‧ pixels

160‧‧‧ touch pad

162, 2620‧‧‧ border

164‧‧‧Sensing line

100‧‧‧ active layer

101‧‧‧data line

102‧‧‧ scan line

103‧‧‧ pixel area

104‧‧‧Active components

105‧‧‧pixel electrodes

161, 261‧‧‧ first touch string

163, 263‧‧‧ second touch string

165‧‧‧Insulation

262‧‧‧Virtual mat

2622‧‧‧virtual pattern

FIG. 1 is a cross-sectional view of a touch display panel according to a first embodiment of the present invention.

2 is a schematic structural view of the active layer of FIG. 1.

3 is a schematic view showing the positional relationship between the touch electrode structure and the light shielding pattern layer in FIG. 1 .

4 is a schematic diagram showing a positional relationship between a touch electrode structure and a light shielding pattern layer in a touch display panel according to a second embodiment of the present invention.

FIG. 5 is a schematic diagram showing a positional relationship between a touch electrode structure and a light shielding pattern layer in a touch display panel according to a second embodiment of the present invention.

FIG. 6 is a schematic diagram showing a positional relationship between a touch electrode structure and a light shielding pattern layer in a touch display panel according to a third embodiment of the present invention.

As shown in FIG. 1 and FIG. 3 , the touch display panel 1 of the first embodiment of the present invention includes a display unit and a touch unit, and the display unit includes a first substrate 10 , a second substrate 12 , and a light shielding pattern layer 14 . And display the dielectric layer 18. The touch unit has a touch electrode structure 16 , and the touch electrode structures 16 are stacked on top of the light shielding pattern layer 14 . The light-shielding pattern layer 14 includes a plurality of criss-cross pattern lines 140 to define a plurality of pixels 142. The touch electrode structure 16 includes a plurality of touch pads 160. The touch pad 160 includes a bezel 162 and a plurality of criss-crossing sensing lines 164 disposed in the bezel 162. The bezel 162 is disposed parallel to the pattern line 140. The sensing line 164 forms a predetermined angle θ with the frame 162.

The second substrate 12 is disposed opposite to the first substrate 10 . The display medium layer 18 is disposed between the first substrate 10 and the second substrate 12. The first substrate 10 and the second substrate 12 may be a glass substrate, a plastic substrate, a ceramic substrate or other suitable substrate. In the embodiment, the display medium layer 18 is a liquid crystal material, and the touch display panel 1 is a touch liquid crystal display panel. It can be understood that, in other alternative embodiments, the display medium layer 18 may also be other display materials, such as an Organic Light Emitting Material, an Electrophoretic Display Material, or a Plasma Display Material. (Plasma Display Material).

As shown in FIGS. 1 and 2, the active layer 100 is disposed on the first substrate 10. The active layer 100 is provided with a data line 101 and a scan line 102 arranged in a crisscross pattern. The data line 101 and the scan line 102 define a pixel array 103 arranged in a plurality of arrays. An active element 104 and a pixel electrode 105 electrically connected to the active element 104 are disposed in each of the pixel regions 103. The active components 104 in each of the pixel regions 103 are respectively connected to the corresponding scan lines 102 and data lines 101 to transmit the display signals in the data lines 101 under the control of the selected signals transmitted by the scan lines 102. Corresponding pixel electrode 105.

The light shielding pattern layer 14 is disposed on the second substrate 12. The pixels 142 on the light shielding pattern layer 14 correspond to the pixel regions 103 on the active layer 100. The light shielding pattern layer 14 is made of a black material that is opaque, such as a black resin. Therefore, the light shielding pattern layer 14 can also be referred to as a black matrix. In the present embodiment, a red filter pattern layer, a blue filter pattern layer, or a green filter pattern layer is disposed in the pixel 142. It can be understood that, in other alternative embodiments, the filter pattern layer may also be disposed on other film layers, such as the active device disposed on the first substrate 10. On the layer 100, in other words, the pixels 142 separated by the light-shielding pattern layer 14 may also be actually openings.

The touch electrode structure 16 is disposed on the other surface of the second substrate 12 opposite to the light shielding pattern layer 14. The touch electrode structure 16 includes a plurality of first touch strings 161 serially connected by the touch pads 160 and a plurality of second touch strings serially connected by the touch pads 160. 163. The first touch string 161 extends in a first direction. The second touch string 163 extends in a second direction that intersects the first direction. The first touch string 161 and the second touch string 163 may be located on the same film layer, and the touch pads 160 on the first touch string 161 and the touch on the second touch string 163 The pads 160 are insulated from each other. The first touch string 161 and the second touch string 163 may also be located on different film layers and are electrically isolated by an intermediate insulating layer 165 (see FIG. 5). The material of the frame 162 and the sensing line 164 is a conductive metal such as aluminum, copper, molybdenum, silver, gold, platinum, and alloys thereof. The spatial frequency of the sense line 164 is substantially the same as the spatial frequency of the pattern line 140. The spatial frequency of the bezel 162 is much smaller than the spatial frequency of the pattern line 140. The width of the bezel 162 is greater than the width of the pattern line 140. The line width of the sensing line 164 is between 0.1 μm and 10 μm. Therefore, the touch pad 160 is actually composed of a very thin metal wire, and the touch pad 160 is estimated to have a relatively high light transmittance.

As shown in FIG. 4, the angle θ formed by the sensing line 164 and the frame 162 is greater than zero degrees. The included angle θ is preferably between 25° and 65°, most preferably 45°. Because the frame 162 and the pattern line 140 are disposed in parallel with each other, the angle θ is also formed between the sensing line 164 and the pattern line 140 with similar spatial frequencies, thereby reducing the grid patterns with the same spatial frequency being parallel to each other. The serious Moire phenomenon that occurs, and mutual The parallel frame 162 and the pattern line 140 are far apart due to the respective spatial frequencies, so that the Mohr phenomenon does not appear in the range of the display screen, or the intensity of the moire fringe is weak to the extent that the human eye cannot perceive it. That is to say, any pattern in the touch electrode structure 16 is not affected by the arrangement of the pattern lines 140 as long as the spatial frequency thereof is far from the spatial frequency of the pattern lines 140. When only the pattern of the touch electrode structure 16 whose spatial frequency is close to the pattern line 140 needs to form a non-zero angle with the pattern line 140. Therefore, the pattern setting of the touch pad 160 provided by the present invention can significantly reduce the Moire phenomenon caused by the interference between the sensing line 164 and the pattern line 140 of the light shielding pattern layer 14 , thereby improving the vision of the touch display panel 1 . effect.

As shown in FIG. 5, the structure of the touch display panel 2 according to the second embodiment of the present invention is basically the same as that of the touch display panel 1 according to the first embodiment of the present invention. The difference is that the first The touch string 261 and the second touch string 263 are respectively disposed on different film layers and separated by an insulating layer 165. A dummy pad 262 is disposed at a gap between the first touch string 261 and the touch pad 260 on the second touch string 263. The virtual pad 262 is electrically insulated from the first touch string 261 and the second touch string 263. The virtual pad 262 has a structure similar to that of a general touch pad 260, and has a frame 2620 and a plurality of dummy patterns 2622 disposed in the frame 2620. The dummy pattern 2622 extends along its length. An extending angle θ of greater than zero degrees is formed between the extending direction of the dummy pattern 2622 and the pattern line 240. The dummy pattern 2622 may be a sensing electrode having a specific function or a pattern for adjusting an appearance effect. In the embodiment, the dummy patterns 2622 are three pairs of rectangular spacers. Each pair of rectangular spacers is arranged in parallel along the length direction. Different pairs of rectangular spacers are arranged in a direction perpendicular to their length.

As shown in FIG. 6, the structure of the touch display panel 3 according to the third embodiment of the present invention is shown. The structure of the touch panel 2 is basically the same as that of the second embodiment of the present invention. The difference is that the first touch string 361 and the second touch string 363 are strip sensing electrodes, respectively. The same film layer 36 is disposed in two directions perpendicular to each other. The first touch string 361 and the second touch string 363 are insulated from each other at the intersection. The dummy pattern 362 is disposed in a rectangular gap defined by the vertically intersecting first touch string 361 and the second touch string 363. An angle θ greater than zero degrees is formed between the length direction of the dummy pattern 362 and the pattern line 340.

It is to be understood by those skilled in the art that the above embodiments are only intended to illustrate the invention, and are not intended to limit the invention, as long as it is within the spirit of the invention Changes and modifications are intended to fall within the scope of the invention.

14‧‧‧Lighting pattern layer

16‧‧‧Touch electrode structure

140‧‧‧ pattern line

142‧‧ ‧ pixels

160‧‧‧ touch pad

162‧‧‧Border

164‧‧‧Sensing line

161‧‧‧The first touch string

163‧‧‧Second touch string

Claims (15)

A touch display panel includes a display unit and a touch unit, the display unit has a light shielding pattern layer, and the light shielding pattern layer includes a plurality of crisscross pattern lines to separate a plurality of pixels, and the touch unit has a touch The control electrode structure includes a plurality of touch pads, the touch pad includes a frame and a sensing line disposed in the frame and staggered, the frame is disposed parallel to the pattern line, and the sensing line is opposite to the The frame is obliquely disposed, and the spatial frequency of the frame is smaller than the spatial frequency of the pattern line. The touch display panel of claim 1, wherein a width of the frame is greater than a width of the pattern line. The touch display panel of claim 1, wherein an angle between the sensing line and the frame is greater than or equal to 25° and less than or equal to 65°. The touch display panel of claim 1, wherein an angle between the sensing line and the bezel is 45°. The touch display panel of claim 1, wherein a line width of the sensing line is between 0.1 μm and 10 μm. The touch display panel of claim 1, wherein the material of the touch pad is selected from the group consisting of aluminum, copper, molybdenum, silver, gold, platinum, and combinations thereof. The touch display panel of claim 1 , wherein the touch electrode structure comprises a plurality of first touch strings serially connected by the touch pads and a plurality of touch pads And connecting the second touch string, the first touch string extends in a first direction, and the second touch string extends in a second direction intersecting the first direction. The touch display panel of claim 7, wherein the first touch string and the second touch string are on the same film layer, and the touch pad on the first touch string Two on the touch string The touch pads are insulated from each other. The touch display panel of claim 7, wherein the first touch string and the second touch string are located on different film layers, and are electrically isolated by an intermediate insulating layer. The touch display panel of claim 9, wherein a gap between the first touch string and the touch pad of the second touch string is provided with a virtual pad, the virtual pad and The first touch string and the second touch string are electrically insulated from each other, and the virtual pad includes a frame and a plurality of dummy patterns disposed in the frame, the dummy pattern extending along a length thereof, the virtual An extending angle of the pattern forms an angle greater than zero degrees between the pattern lines. The touch display panel of claim 10, wherein the virtual pattern is a plurality of pairs of rectangular spacers, each pair of rectangular spacers are arranged in parallel along the length direction, and the pair of rectangular spacers are perpendicular to the length of the pair The direction of the arrangement. A touch display panel includes a display unit and a touch unit, the display unit has a light shielding pattern layer, and the light shielding pattern layer includes a plurality of crisscross pattern lines to separate a plurality of pixels, and the touch unit has a touch The control electrode structure includes a plurality of strip-shaped first touch electrodes and a plurality of strip-shaped second touch electrodes, wherein the first touch electrodes and the second touch electrodes are perpendicular to each other And extending in the direction of the intersection, and the virtual gaps are formed in the rectangular gaps defined by the first touch electrodes and the second touch electrodes that are perpendicularly intersected, and the length direction of the dummy patterns and the pattern lines are Form an angle greater than zero degrees. The touch display panel of claim 12, wherein the virtual pattern is a plurality of pairs of rectangular spacers, each pair of rectangular spacers are arranged in parallel along a length direction, and the pair of rectangular spacers are perpendicular to the length of the pair The direction of the arrangement. The touch display panel of claim 12, wherein the included angle ranges from 25° or more to less than or equal to 65°. The touch display panel of claim 12, wherein the included angle is 45°.