TWI613580B - Sensing display apparatus - Google Patents

Abstract

A sensing display device includes a display panel, a packaging layer, and a sensing line. Road layer and cover. The display panel has a display area. The encapsulation layer covers the display panel, and the minimum thickness of the encapsulation layer is between 1 micrometer and 10 micrometers. The sensing circuit layer is disposed on the packaging layer, and the ratio of the layout area of the sensing circuit layer to the area of the display area is between 3% and 15%. The cover body covers the packaging layer and the sensing circuit layer, and the thickness of the cover body is between 10 microns and 120 microns.

Description

Sensing display device

Embodiments of the present invention relate to a sensing device, and more particularly, to a sensing display device.

In recent years, the maturity of optoelectronic technology and semiconductor manufacturing technology has led to the development of display panel technology. Common display panels, including liquid crystal display panels and organic electroluminescent display panels, have been successively accepted by users. Today's display devices continue to develop towards thin and light, narrow bezels, high display quality, and versatility. In addition to the development trends mentioned above, display panels with powerful sensing functions have brought excellent use to users. And ease of operation. At this stage, the sensing technology is roughly divided into resistive sensing technology, capacitive sensing technology, optical sensing technology, acoustic wave sensing technology, and electromagnetic sensing technology according to the different sensing methods. Taking capacitive sensing technology as an example, it has the advantages of fast response time, good reliability, and high durability, and can be widely used on display panels.

As the thickness of the sensing display device is continuously required to be reduced, the distance between the sensing circuit layer and the display pixels is also shortened, and the shortening of the distance between the sensing circuit layer and the display pixels will affect the sensing circuit layer. Operating sensitivity.

An embodiment of the present invention provides a sensing display device, which includes a display panel, a packaging layer, a sensing circuit layer, and a cover. The display panel has a display area. The encapsulation layer covers the display panel, and the minimum thickness of the encapsulation layer is between 1 micrometer and 10 micrometers. The sensing circuit layer is disposed on the packaging layer, and the ratio of the layout area of the sensing circuit layer to the area of the display area is between 3% and 15%. The cover body covers the packaging layer and the sensing circuit layer, and the thickness of the cover body is between 10 microns and 120 microns.

Another embodiment of the present invention provides a sensing display device, which includes a display panel, a packaging layer, and a sensing circuit layer. The display panel has a display area, and the display panel includes at least one conductive layer. The encapsulation layer covers the display panel. The sensing circuit layer is disposed on the packaging layer. The ratio of the layout area of the sensing circuit layer to the area of the display area is between 3% and 15%, and the distance between the conductor layer and the sensing circuit layer is between 1 micrometer and Between 10 microns.

Another embodiment of the present invention provides a sensing display device including a display panel, a packaging layer, a sensing circuit layer, and a cover. The display panel has a display area, and the display panel includes a first electrode layer, a second electrode layer, and a display medium. The display medium is located between the first electrode layer and the second electrode layer. The encapsulation layer covers the display panel, and the second electrode layer is located between the display medium and the encapsulation layer. The sensing circuit layer is disposed on the packaging layer, and the ratio of the layout area of the sensing circuit layer to the area of the display area is between 3% and 15%. The sensing circuit layer includes a plurality of first sensing layers that are electrically insulated from each other. A sensing electrode and a plurality of second sensing electrodes, and the distance between the circuit layer and the second electrode is sensed Between 1 and 10 microns. The cover body covers the packaging layer and the sensing circuit layer. The cover body has a sensing surface, and the distance between the sensing circuit layer and the sensing surface of the cover body is between 10 microns and 120 microns.

In order to make the present invention more comprehensible, embodiments are hereinafter described in detail with reference to the accompanying drawings.

100, 200‧‧‧ sensing display device

110‧‧‧display panel

110a‧‧‧display area

112‧‧‧first electrode layer

112a‧‧‧Anode pattern

114‧‧‧Second electrode layer

116‧‧‧Display media

120‧‧‧Encapsulation layer

130‧‧‧sensing circuit layer

132‧‧‧first sensing electrode

132a‧‧‧first lead

132a1, 132a2, 134a2, 134a2 ‧‧‧ patterns

134‧‧‧Second sensing electrode

134a‧‧‧Second Conductor

136‧‧‧ insulation pattern

140‧‧‧ cover

140a‧‧‧Sensing surface

C‧‧‧Conductor layer

D1, D2‧‧‧ distance

DR1‧‧‧ direction

DR2‧‧‧column direction

L, L’ ‧‧‧ line width

P‧‧‧Pixels

S‧‧‧Pitch

SUB‧‧‧ substrate

T1, T2‧‧‧thickness

X‧‧‧ position

FIG. 1 is a schematic cross-sectional view of a sensing display device according to a first embodiment of the present invention.

FIG. 2 is a schematic top view of the sensing circuit layer in FIG. 1.

FIG. 3 is a partial schematic diagram of a first sensing electrode and a corresponding second sensing electrode.

FIG. 4 is a relationship diagram between the line width of the first sensing electrode and the second sensing electrode, the minimum thickness of the packaging layer, and the generated capacitance.

5A is a schematic top view of a first sensing electrode, a second sensing electrode, and pixels according to a second embodiment of the present invention.

FIG. 5B is a partially enlarged schematic view of position X in FIG. 5A.

FIG. 6 is a schematic cross-sectional view of a sensing display device according to a third embodiment of the present invention.

First embodiment

FIG. 1 is a schematic cross-sectional view of a sensing display device according to a first embodiment of the present invention, and FIG. 2 is a schematic top view of a partial area of a sensing circuit layer in FIG. 1. Referring to FIG. 1 and FIG. 2, the sensing display device 100 in this embodiment may include a display panel 110, a packaging layer 120, and a sensing circuit layer 130. The display panel 110 has a display area 110a, and the display panel 110 includes at least one conductive layer C. The encapsulation layer 120 covers the display panel 110. The sensing circuit layer 130 is disposed on the packaging layer 120. The ratio of the layout area of the sensing circuit layer 130 to the area of the display area 110a is between 3% and 15%, and the conductive layer C and the sensing circuit in the display panel 110 The distance D1 between the layers 130 is between 1 micrometer and 10 micrometers. Here, the layout area of the sensing circuit layer 130 generally refers to the area of the sensing circuit layer 130 that actually has a sensing effect. In some embodiments, if the sensing circuit layer 130 includes dummy patterns , The area occupied by the pseudo-pattern is not included in the calculation of the layout area of the sensing circuit layer 130.

In some embodiments, the display panel 110 may include a substrate SUB, a first electrode layer 112, a second electrode layer 114, and a display medium 116. The first electrode layer 112, the second electrode layer 114, and the display medium 116 are all formed on the substrate. SUB, and the display medium 116 is located between the first electrode layer 112 and the second electrode layer 114, and the second electrode layer 114 is located between the display medium 116 and the packaging layer 120. For example, the aforementioned first electrode layer 112 may be an active device array, wherein the active device array includes a plurality of anode patterns 112a arranged in an array, and the aforementioned second electrode layer 114 is a common cathode layer, and the display medium 116 may include Organic electro-excitation light layer. Taking the above-mentioned display panel 110 of organic electro-excitation light type as an example, the conductive layer C refers to a display panel The electrode layer 110 is relatively adjacent to the encapsulation layer 120 or the sensing circuit layer 130, such as the second electrode layer 114 shown in FIG. 1.

In some embodiments, the active device array may be a thin film transistor array, and the thin film transistor array may include a plurality of scan lines, a plurality of data lines, and a plurality of pixels, and each pixel is corresponding to a corresponding scan line and data. The lines are electrically connected, and each pixel includes a driving circuit electrically connected to the corresponding scanning line and the data line, and a pixel electrode electrically connected to the driving circuit. For example, the driving circuit is, for example, a 2T1C circuit structure composed of 2 transistors and a capacitor, a 4T2C circuit structure composed of 4 transistors and 2 capacitors, or another number of transistors and capacitors Circuit architecture. In addition, the material of the pixel electrode may be a transparent conductive oxide (such as indium tin oxide, indium zinc oxide, etc.).

In the organic electroluminescent display panel 110 shown in FIG. 1, the distribution range of the conductive layer C (ie, the second electrode layer 114) generally corresponds to the display area 110 a of the display panel 110, and the conductive layer C That is, the layout area of the second electrode layer 114 is, for example, slightly larger than or substantially equal to the area of the display area 110 a of the display panel 110. The conductor layer C (ie, the second electrode layer 114) in the display panel 110 is adjacent to the sensing circuit layer 130 (for example, the distance D1 between the two is between 1 micrometer and 10 micrometers), and the conductor layer C (that is, The second electrode layer 114) has a large layout area, and the conductor layer C (ie, the second electrode layer 114) may affect the operation sensitivity of the sensing circuit layer 130. In order to reduce the degree to which the operating sensitivity of the sensing circuit layer 130 is affected, in this embodiment, the ratio of the layout area of the sensing circuit layer 130 to the area of the display area 110a is controlled between 3% and 15%, so that the sensing circuit layer 130 130 produces enough Capacitance value (for example, between 1 pF and 20 pF). In other words, when the ratio of the layout area of the sensing circuit layer 130 to the area of the display area 110a is between 3% and 15%, the interference of the conductive layer C (ie, the second electrode layer 114) on the sensing circuit layer 130 may be be ignored. According to the above, when the ratio of the layout area of the sensing circuit layer 130 to the area of the display area 110a is between 3% and 15%, the operating sensitivity of the sensing circuit layer 130 will not be greatly affected by the display panel 110. Significant degradation.

As shown in FIG. 1, the display panel 110 and the sensing circuit layer 130 are respectively located on two opposite sides of the packaging layer 120. That is, the minimum thickness T1 of the packaging layer 120 may determine the distance D1 between the conductor layer C and the sensing circuit layer 130. In some embodiments, the minimum thickness T1 of the packaging layer 120 is, for example, between 1 μm and 10 μm. At this time, the distance D1 between the conductor layer C and the sensing circuit layer 130 is substantially equal to the minimum thickness of the packaging layer 120. Thickness T1. For example, the encapsulation layer 120 may be one or more dielectric layers with good water and oxygen blocking capabilities, and the Water Vapor Transmission Rate (WVTR) of the encapsulation layer 120 may be less than 10 ^-1 g / m ² ‧day, for example between 10 ^-1 g / m ² ‧day and 10 ^-6 g / m ² ‧day.

In some embodiments, the sensing circuit layer 130 includes a plurality of first sensing electrodes 132 and a plurality of second sensing electrodes 134 which are electrically insulated from each other, and the first sensing electrode 132 or the second sensing electrode 134 The distance from the conductor layer C (ie, the second electrode layer 114) is between 1 micrometer and 10 micrometers. Here, the layout area of the sensing circuit layer 130 is the area occupied by the first sensing electrode 132 and the second sensing electrode 134. As shown in FIG. 1, the first sensing electrodes 132 in the sensing circuit layer 130 are electrically insulated from each other, and the second sensing electrodes 134 in the sensing circuit layer 130 are electrically insulated from each other. The first sensing electrode 132 and the second sensing electrode 134 are staggered, and the first sensing electrode 132 and the second sensing electrode 134 can be electrically insulated from each other by the insulation pattern 136 at the intersection.

In some embodiments, the first sensing electrode 132 and the second sensing electrode 134 may include a transparent conductive oxide layer (for example, an indium tin oxide layer, an indium zinc oxide layer, etc.) and a plurality of bridge lines ( For example, a metal bridge line), and the transparent conductive oxide layer and the bridge line are electrically insulated from each other by an insulating pattern 136. In other embodiments, the first sensing electrode 132 and the second sensing electrode 134 may have two transparent conductive oxide layers (for example, an indium tin oxide layer, an indium zinc oxide layer, etc.), and the two layers are transparent. The conductive oxide layers are electrically insulated from each other by an insulating pattern 136. Besides, the above-mentioned transparent conductive oxide layer may be replaced by a metal layer. It is worth noting that the fabrication of the first sensing electrode 132 and the second sensing electrode 134 can be changed according to the actual design requirements, and the embodiments of the present invention are not limited to the above designs.

FIG. 3 is a partial schematic diagram of a first sensing electrode and a corresponding second sensing electrode. Referring to FIG. 3, in some embodiments, the first sensing electrode 132 and the second sensing electrode 134 may be in the form of conductive traces and extend along a predetermined path, and the first sensing electrode 132 and its phase A substantially constant distance S is maintained between the corresponding second sensing electrodes 134. For example, the first sensing electrode 132 and the second sensing electrode may have the same line width L, and the line width L may be between 50 μm and 70 μm. The first sensing electrode 132 and its corresponding first The distance S between the two sensing electrodes 134 may be between 50 micrometers and 80 micrometers. In some embodiments, the package The ratio of the minimum thickness T1 (or the distance D1) of the layer 120 to the distance S can be between 1:50 and 1:80. In other embodiments, the ratio of the line width L to the space S may be between 1: 0.5 and 1: 0.9.

FIG. 4 is a relationship diagram between the line width of the first sensing electrode and the second sensing electrode, the thickness of the packaging layer, and the generated capacitance value. Referring to FIG. 4, when the distance S (for example, 40 μm) between the first sensing electrode 132 and its corresponding second sensing electrode 134 and the minimum thickness T1 of the packaging layer 120 are fixed, the first sensing The larger the line width L of the electrode 132 and the second sensing electrode 134 is, the larger the capacitance value generated between the first sensing electrode 132 and the second sensing electrode 134 is. In addition, when the distance S (for example, 40 microns) and the line width L are fixed, the smaller the minimum thickness T1 of the packaging layer 120 is, the capacitance value generated between the first sensing electrode 132 and the second sensing electrode 134 is. The smaller.

As can be seen from FIG. 4, in the design, when the thickness of the sensing display device 100 is required to be reduced, the minimum thickness T1 of the packaging layer 120 may also be required to be reduced. The capacitance value generated during this period will decrease due to the decrease in the minimum thickness T1 of the packaging layer 120. At this time, the line width L of the first sensing electrode 132 and the second sensing electrode 134 in the sensing circuit layer 130 must be sufficiently large. In order to be able to produce a sufficiently large capacitance value. In the foregoing embodiment, when the ratio of the layout area of the sensing circuit layer 130 to the area of the display area 110a is between 3% and 15%, the interval between the first sensing electrode 132 and the second sensing electrode 134 is reduced. A sufficient capacitance value may be generated to maintain the operation sensitivity of the sensing circuit layer 130.

Second embodiment

FIG. 5A is a schematic top view of a first sensing electrode, a second sensing electrode, and a pixel according to a second embodiment of the present invention, and FIG. 5B is a partially enlarged schematic view of position X in FIG. 5A. Please refer to FIG. 5A and FIG. 5B. In this embodiment, in order to reduce the visual impact of the sensing circuit layer 130 on the display panel 110, the first sensing electrode 132 and the second sensing in the sensing circuit layer 130 may be caused. The layout position of the electrodes 134 does not overlap with the pixels P in the display panel 110. For example, the first sensing electrodes 132 and the second sensing electrodes 134 in a wire shape may correspond to the area distribution between adjacent pixels P, and the principle is not to cover the pixels P, where the pixels P It can be arranged in an array, for example.

As shown in FIG. 5A and FIG. 5B, in order to enable a sufficiently large capacitance value between the first sensing electrode 132 and the corresponding second sensing electrode 134, the first sensing electrode 132 and the second sensing electrode 134 Must have a sufficiently large line width L (as shown in FIG. 4), but if the line width L of the first sensing electrode 132 and the second sensing electrode 134 is greater than the area width between adjacent pixels P, the first The sensing electrodes 132 and the second sensing electrodes 134 inevitably overlap with the pixels P and affect the overall vision of the display panel 110. Therefore, in this embodiment, multiple line widths L 'may be smaller and connected to each other. To form the first sensing electrode 132, and / or a plurality of second leads 134a having a small line width L 'and connected to each other may be used to form the second sensing electrode 134. Here, the line width L 'of the first conductive line 132a and the second conductive line 134a is based on the principle that it is not larger than the area width between the pixels P, and the distribution of the first conductive line 132a and the second conductive line 134a does not overlap the pixels P.

As shown in FIG. 5A, the pixels P of the display panel 100 may be along the row direction DR1. They are arranged in an array with the column direction DR2, and each of the first conductive lines 132a constituting the first sensing electrode 132 is composed of a plurality of patterns 132a1 extending along the row direction DR1 and a plurality of patterns 132a2 extending along the column direction DR2. . Similarly, each of the second conductive lines 134a constituting the second sensing electrode 134 is composed of a plurality of patterns 134a1 extending along the row direction DR1 and a plurality of patterns 134a2 extending along the column direction DR2.

Please refer to FIG. 5A and FIG. 5B. In a proximity area where the first sensing electrode 132 and the second sensing electrode 134 intersect, the first conductive line 132a and the second conductive line 134a may have a stepped pattern, and this step The shape pattern is composed of the aforementioned patterns 132a2, 134a2, 132a1, and 134a1. Following the above, the step pattern can help the first sensing electrode 132 and the second sensing electrode 134 not to overlap the pixel P.

Third embodiment

FIG. 6 is a schematic cross-sectional view of a sensing display device according to a third embodiment of the present invention. Referring to FIG. 6, the sensing display device 200 in this embodiment is similar to the sensing display device 100 in the first embodiment. The sensing display device 200 may further include a cover 140 that covers the encapsulation layer 120 and the sensing line. The thickness T2 of the circuit layer 130 and the cover 140 may be between 10 μm and 120 μm. In other embodiments, the thickness T2 of the cover 140 is, for example, between 12 microns and 60 microns.

The thickness T2 of the cover 140 determines the distance D2 between the first sensing electrode 132 and the sensing surface 140a of the cover 140 or the distance D2 between the second sensing electrode 134 and the sensing surface 140a of the cover 140. In some embodiments, there may be no other film between the cover 140 and the sensing circuit layer 130, so the aforementioned distance D2 may be substantially The thickness T2 is equal to the thickness T2 of the cover 140 (for example, between 10 μm and 120 μm). In other embodiments, there may be other films (such as an adhesive layer, a barrier layer, a protective layer, etc.) between the cover 140 and the sensing circuit layer 130, so the aforementioned distance D2 may be greater than the thickness T2 of the cover 140, The distance D2 is still between 10 microns and 120 microns.

It is worth noting that the design of the first sensing electrode 132 and the second sensing electrode 134 described in the second embodiment (ie, FIGS. 5A and 5B) can be applied to the sensing display devices 100 and 200 of this embodiment. In.

Although the present invention has been disclosed as above with the examples, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field can make some modifications and retouching without departing from the spirit and scope of the present invention. The protection scope of the present invention shall be determined by the scope of the appended patent application scope and its equivalent scope.

100‧‧‧ sensing display device

110‧‧‧display panel

110a‧‧‧display area

112‧‧‧first electrode layer

112a‧‧‧Anode pattern

114‧‧‧Second electrode layer

116‧‧‧Display media

120‧‧‧Encapsulation layer

130‧‧‧sensing circuit layer

132‧‧‧first sensing electrode

134‧‧‧Second sensing electrode

136‧‧‧ insulation pattern

C‧‧‧Conductor layer

D1‧‧‧distance

SUB‧‧‧ substrate

T1‧‧‧thickness

Claims (17)

A sensing display device includes: a display panel having a display area; an encapsulation layer covering the display panel, the minimum thickness of the encapsulation layer being between 1 micrometer and 10 micrometers; and a sensing circuit layer disposed in the On the packaging layer, a ratio of a layout area of the sensing circuit layer to an area ratio of the display area is between 3% and 15%; and a cover body covering the packaging layer and the sensing circuit layer, The thickness of the cover is between 10 microns and 120 microns. The sensing display device according to item 1 of the scope of patent application, wherein the display panel includes a first electrode layer, a second electrode layer, and a display medium, and the display medium is located between the first electrode layer and the second electrode layer. Between the electrode layers, and the second electrode layer is located between the display medium and the encapsulation layer. The sensing display device according to item 2 of the scope of patent application, wherein the display panel includes a display panel of an organic electroluminescent type, the first electrode layer includes an active device array, and the active device array includes An anode pattern arranged in an array, the second electrode layer includes a common cathode layer, and the display medium includes an organic electro-excitation light layer. The sensing display device according to item 1 of the patent application scope, wherein the packaging layer includes at least one dielectric layer. The sensing display device according to item 1 of the scope of patent application, wherein the display panel includes a plurality of pixels distributed in the display area, and the sensing circuit layer does not overlap the pixels. The sensing display device according to item 1 of the patent application scope, wherein the cover has a sensing surface, and a distance between the sensing circuit layer and the sensing surface of the cover is between 10 microns To 120 microns. A sensing display device includes: a display panel having a display area, and the display panel includes at least one conductor layer; a packaging layer covering the display panel; and a sensing circuit layer disposed on the packaging layer, The ratio of the layout area of the sensing circuit layer to the area of the display area is between 3% and 15%, and the distance between the conductor layer and the sensing circuit layer is between 1 micrometer and 10 micrometers. between. The sensing display device according to item 7 of the patent application scope, wherein the sensing circuit layer includes a plurality of first sensing electrodes and a plurality of second sensing electrodes that are electrically insulated from each other, and the first The distance between the sensing electrode or the second sensing electrode and the conductor layer is between 1 micrometer and 10 micrometers. The sensing display device according to item 8 of the scope of patent application, wherein the display panel includes a plurality of pixels distributed in the display area, and the first sensing electrode and the plurality of second sensing electrodes Does not overlap with the pixels. The sensing display device according to item 7 of the scope of patent application, wherein the display panel includes a display panel of an organic electroluminescent type, and the conductor layer includes a common cathode layer. The sensing display device according to item 7 of the patent application scope, wherein the packaging layer includes at least one dielectric layer. The sensing display device according to item 7 of the scope of patent application, further comprising a cover, wherein the cover covers the packaging layer and the sensing circuit layer, and the cover has a sensing surface. The sensing display device according to item 12 of the application, wherein a distance between the sensing circuit layer and the sensing surface is between 10 micrometers and 120 micrometers. A sensing display device includes a display panel having a display area, and the display panel includes a first electrode layer, a second electrode layer, and a display medium. The display medium is located on the first electrode layer and the second electrode layer. Between the electrode layers; an encapsulation layer covering the display panel, and the second electrode layer is located between the display medium and the encapsulation layer; a sensing circuit layer is disposed on the encapsulation layer, the The ratio of the layout area of the sensing circuit layer to the area of the display area is between 3% and 15%. The sensing circuit layer includes a plurality of first sensing electrodes and a plurality of first sensing electrodes that are electrically insulated from each other. Two sensing electrodes, and a distance between the sensing circuit layer and the second electrode layer is between 1 micrometer and 10 micrometers; and a cover body, wherein the cover body covers the encapsulation layer and the A sensing circuit layer, the cover has a sensing surface, and a distance between the sensing circuit layer and the sensing surface of the cover is between 10 micrometers and 120 micrometers. The sensing display device according to item 14 of the scope of patent application, wherein the display panel includes a display panel of an organic electro-excitation light type, the first electrode layer includes an active element array, and the active element array includes a plurality of An anode pattern arranged in an array, the second electrode layer includes a common cathode layer, and the display medium includes an organic electro-excitation light layer. The sensing display device according to item 14 of the application, wherein the display panel includes a plurality of pixels distributed in the display area, and the first sensing electrode and the plurality of second sensing electrodes Does not overlap with the pixels. The sensing display device according to item 14 of the patent application scope, wherein the packaging layer includes at least one dielectric layer.