TWI497368B - Organic electroluminescent type touch display panel - Google Patents

Description

Organic electroluminescent touch display panel

The invention relates to an organic electroluminescent touch display panel.

At present, an organic electroluminescent display panel is usually implemented by attaching a touch screen to an organic electroluminescent display panel by bonding or the like. However, the above-mentioned organic electroluminescent display panel and touch screen generally have independent driving circuit structures, and respectively need to be connected to the printed circuit board by a flexible circuit board, and the organic electroluminescent touch display is visible. The structure of the panel is relatively complicated, which does not conform to the trend of increasing integration and thinning of the existing touch display panel.

In view of this, it is necessary to provide an organic electroluminescent touch display panel having a relatively simple structure.

An organic electroluminescent touch display panel includes a light emitting structure, a touch conductive structure and a driving structure. The light emitting structure includes a cathode, an anode, and an organic light emitting layer sandwiched between the cathode and the anode. The touch conductive structure is electrically connected to the anode for detecting a touch action applied to the organic electroluminescent touch display panel. The driving structure is electrically connected to the light emitting structure for providing a display driving signal to the light emitting structure and providing a touch driving signal to the touch conductive structure.

Compared with the prior art, in the organic electroluminescent touch display panel of the present invention, The touch-control conductive structure electrically connects the anode, the driving structure provides a display driving signal to the light-emitting structure, and provides a touch driving signal to the touch conductive structure, so that the display driving structure and the touch of the organic electroluminescent touch display panel The control driving structures are integrated, so that the organic electroluminescent touch display panel is relatively simple.

10‧‧‧Organic electroluminescent touch display panel

11‧‧‧Lighting structure

12‧‧‧Touch conductive structure

13‧‧‧Drive structure

14‧‧‧Soft circuit board

111‧‧‧Anode

112‧‧‧ cathode

113‧‧‧Organic light-emitting layer

131‧‧‧First film transistor

132‧‧‧Second thin film transistor

133‧‧‧ Storage Capacitor

134‧‧ ‧ gate line

135‧‧‧Information line

136‧‧‧Power line

150‧‧‧ pixels

121‧‧‧First conductive line

122‧‧‧Second conductive line

150a‧‧‧The first line of pixels

150b‧‧‧second line of pixels

150c‧‧‧ first end

150d‧‧‧second end

141‧‧‧Signal transmission line

101‧‧‧First substrate

102‧‧‧second substrate

103‧‧‧ dielectric layer

104‧‧‧ Sealant

137‧‧‧ gate insulation

138‧‧‧First isolation group

139‧‧‧Second isolation group

130‧‧‧ Passivation layer

G‧‧‧ gate

S‧‧‧ source

D‧‧‧汲

160‧‧‧ channel layer

105, 170, 172‧‧‧ vias

1 is a schematic structural view of a circuit of an organic electroluminescent touch display panel of the present invention.

2 is a schematic plan view showing the structure of a touch conductive structure of the organic electroluminescent touch display panel of FIG. 1 .

3 is a cross-sectional view of the organic electroluminescent touch display panel of FIG. 1.

Please refer to FIG. 1. FIG. 1 is a schematic structural diagram of an organic electroluminescent display panel 10 according to the present invention. The organic electroluminescent display panel 10 can be an organic light emitting diode (OLED) type touch display panel, and includes a light emitting structure 11 , a touch conductive structure 12 , a driving structure 13 , and a flexible circuit board . 14. The light emitting structure 11 includes a cathode 112, an anode 111, and an organic light emitting layer 113 sandwiched between the cathode 112 and the anode 111. The touch conductive structure 12 is electrically connected to the anode 111 for detecting a touch action applied to the organic electroluminescent touch display panel 10. The driving structure 13 is electrically connected to the light emitting structure 11 for providing a display driving signal to the light emitting structure 11 and providing a touch driving signal to the touch conductive structure 12 . The flexible circuit board 14 is electrically connected to the driving structure 13 for transmitting various driving signals to the driving structure 13. The driving structure 13 can alternately output the display driving signal and the touch driving signal to the light emitting structure 11 and the touch conductive structure 12 .

The driving structure 13 includes a first thin film transistor 131, a second thin film transistor 132, a storage capacitor 133, a gate line 134, a data line 135, and a power line 136. The data line 135 and the power lines 136 are parallel to each other and perpendicularly insulated from the gate lines 134. The data line 135, the power line 136 and the gate line 134 intersect to define a plurality of pixels 150 arranged in a matrix. Each of the pixels 150 includes a light emitting structure 11 , a storage capacitor 133 , a first thin film transistor 131 , and a second thin film transistor 132 . The gate of the first thin film transistor 131 is connected to the gate line 134. The source of the first thin film transistor 131 is connected to the data line 135. The drain of the first thin film transistor 131 passes through the storage capacitor 133. The power line 136 is connected. The gate of the second thin film transistor 132 is connected to the drain of the first thin film transistor 131, and the drain of the second thin film transistor 132 is connected to the anode 111 of the light emitting structure 11 and the touch conductive structure 12, The source of the second thin film transistor 132 is connected to the power line 136.

The gate line 134, the data line 135, and the power line 136 are also connected to the flexible circuit board 14 via the signal transmission line 141, and the touch control structure 12 is connected to the flexible circuit board 14 via the driving structure 13, so that the touch The control conductive structure 12 does not need to be separately connected to the flexible circuit board 14.

The touch conductive structure 12 includes a first conductive line 121 and a second conductive line 122 insulated from the first conductive line 121. The first conductive line 121 and the second conductive line 122 respectively connect the light of two different pixels 150. The anode 111 of the structure 11. Specifically, the first conductive line 121 and the second conductive line 122 are adjacently disposed and extend along a direction of the pixel matrix row, and the first conductive line 121 corresponds to at least one row of pixels 150 and the line pixel 150 One of the anodes 111 of the light-emitting structure 11 is connected, and the second conductive line 122 corresponds to at least one row of pixels 150 and is connected to the anode 111 of the light-emitting structure 11 of one of the rows of pixels 150. In one embodiment, at least one row of pixels 150 corresponding to the first conductive line 121 is defined as a first row of pixel groups 150a, and at least one row of pixels 150 corresponding to the second conductive line 122 is defined as a second row of pixels. Group 150b, The first row pixel group 150a and the second row pixel group 150b include a first end 150c and a second end 150d opposite to the first end 150c, and the first conductive line 121 is connected to the first row of pixel groups The anode 111 of the light-emitting structure 11 of the outermost pixel 150 of the first end 150c of 150a, the second conductive line 122 is connected to the light of the outermost pixel 150 of the second end 150d of the second row of pixel groups 150b The anode 111 of the structure 11.

2 is a schematic plan view of the touch control structure 12 of the organic electroluminescent touch display panel 10 of FIG. The first conductive line 121 and the second conductive line 122 are comb-shaped, and the comb shape of the first conductive line 121 and the comb-like staggered engagement of the second conductive line 122. The first conductive line 121 is capacitively coupled to the second conductive line 122 such that the touch conductive structure 12 forms a capacitive touch circuit structure.

Please refer to FIG. 3. FIG. 3 is a cross-sectional view of the organic electroluminescent display panel 10 of FIG. 1. It can be understood that the cross-sectional view only shows a partial cross-sectional structure of a pixel. . The organic electroluminescent touch display panel 10 further includes a first substrate 101 , a second substrate 102 , a dielectric layer 103 , and a sealant 104 . A via hole 105 is provided in the dielectric layer 103. The driving structure 13 is disposed on the first substrate 101. The light emitting structure 11 is disposed on a side of the driving structure 13 away from the first substrate 101. The dielectric layer 103 is disposed on the driving structure 11 away from the driving structure 13. The touch control structure 12 is disposed on a side of the dielectric layer 103 away from the light emitting structure 11 , and the touch conductive structure 12 passes through the via hole 105 in the dielectric layer 103 and the light emitting structure 11 The second substrate 102 is disposed on a side of the touch-control conductive structure 12 away from the first substrate 101. The second substrate 102 is a package cover plate and is connected to the first substrate 101 through the sealant 104. The substrate 101 and the second substrate 102 seal the touch conductive structure 12, the light emitting structure 11 and the driving structure 13 Installed in between.

The driving structure 13 further includes a gate insulating layer 137, a first isolation layer group 138, a second isolation layer group 139, and a passivation layer 130. The first thin film transistor 131 and the second thin film transistor 132 include a channel layer 160. The first isolation layer group 138 is disposed on the first substrate 101. The channel layer 160 is disposed on the first isolation layer group 138. The gate insulation layer 137 is disposed on the channel layer 160. The gate electrode G is disposed on the gate insulating layer 137, and the second isolation layer group 139 is disposed on the gate G and the gate insulating layer 137. The source S And the drain D is disposed on the second isolation layer group 139 and is respectively connected to the channel layer 160 through the via hole 170 in the second isolation layer group 139. The passivation layer 130 is disposed on the source S and the drain D and the second isolation layer group 139, the anode 111 is disposed on the passivation layer 130 and connected to the drain D through the via hole 172 in the passivation layer 130. The organic light-emitting layer 113 and the cathode 112 are sequentially It is disposed on the anode 111.

In addition, at least one of the first thin film transistor 131 and the second thin film transistor 132 is a low temperature polysilicon (LTPS) thin film transistor. The organic light emitting layer 113 may include a hole transport layer, an organic layer, an electron transport layer, and the like. The organic electroluminescent display panel 10 is a top-emitting organic electroluminescent display panel. The optical fiber emitted by the illumination structure 11 is sequentially provided to the panel viewer via the driving structure 13 and the first substrate 101. .

In the organic electroluminescent display panel 10 of the present invention, the touch control structure 12 is electrically connected to the anode 111. The driving structure 13 provides display driving signals to the light emitting structure 11 and provides touch driving. The display of the organic electroluminescent display panel 10 is integrated with the touch driving structure, so that the organic electroluminescent touch display panel 10 is integrated with the touch control structure. It's simpler.

In addition, the touch control structure 12 is formed on the light emitting structure 11 via the dielectric layer 103, so that the touch conductive structure 12 and the light emitting structure 11 are integrated on the same panel, compared with the previous additional touch screen through the colloid. The organic electroluminescent touch display panel has higher integration and lower thickness, and conforms to the trend of increasingly thinner and thinner touch display panels.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only the preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and those skilled in the art can make equivalent modifications or variations according to the spirit of the present invention. All should be covered by the following patent application.

10‧‧‧Organic electroluminescent touch display panel

11‧‧‧Lighting structure

12‧‧‧Touch conductive structure

13‧‧‧Drive structure

14‧‧‧Soft circuit board

111‧‧‧Anode

112‧‧‧ cathode

113‧‧‧Organic light-emitting layer

131‧‧‧First film transistor

132‧‧‧Second thin film transistor

133‧‧‧ Storage Capacitor

134‧‧ ‧ gate line

135‧‧‧Information line

136‧‧‧Power line

141‧‧‧Signal transmission line

150‧‧‧ pixels

121‧‧‧First conductive line

122‧‧‧Second conductive line

150a‧‧‧The first line of pixels

150b‧‧‧second line of pixels

150c‧‧‧ first end

150d‧‧‧second end

Claims (13)

An organic electroluminescent touch display panel comprising: a light emitting structure comprising a cathode, an anode and an organic light emitting layer sandwiched between the cathode and the anode; and a touch conductive structure electrically connected to the anode for Detecting a touch action applied to the organic electroluminescent touch display panel, the touch conductive structure comprising a first conductive line and a second conductive line insulated from the first conductive line, the organic electroluminescent touch The control display panel further defines a plurality of pixels, each pixel corresponding to a light-emitting structure, the first conductive line and the second conductive line are respectively connected to the anodes of the two different pixel light-emitting structures; and the driving structure is electrically connected The light emitting structure is configured to provide a display driving signal to the light emitting structure and to provide a touch driving signal to the touch conductive structure. The organic electroluminescent touch display panel of claim 1, wherein the driving structure alternately outputs the display driving signal and the touch driving signal to the light emitting structure and the touch conductive structure. The organic electroluminescent touch display panel of claim 1, wherein the organic electroluminescent touch display panel further comprises a flexible circuit board electrically connected to the driving structure, wherein the touch conductive structure The light emitting structure and the driving structure are electrically connected to the flexible circuit board. The organic electroluminescent touch display panel of claim 1, wherein the organic electroluminescent touch display panel further comprises a first substrate and a dielectric layer, wherein the dielectric layer is provided with the dielectric layer a driving hole is disposed on the first substrate, the light emitting structure is disposed on a side of the driving structure away from the first substrate, and the dielectric layer is disposed on a side of the light emitting structure away from the driving structure The touch conductive structure is disposed on a side of the dielectric layer away from the light emitting structure, and the touch conductive structure is connected to the anode in the light emitting structure through a via hole in the dielectric layer Pick up. The organic electroluminescent touch display panel of claim 4, wherein the organic electroluminescent touch display panel further comprises a second substrate and a seal body, wherein the second substrate is disposed on the touch conductive layer The structure is away from the side of the first substrate, the second substrate is a package cover plate and the first substrate is connected through the sealant, so that the first substrate and the second substrate are the touch conductive structure, the light emitting structure and the driving The structure is packaged in between. The organic electroluminescent touch display panel of claim 1 or 3, wherein the driving structure comprises a gate line, a data line, a power line, a storage capacitor, a first thin film transistor, and a second thin film a crystal, the gate line is insulated from the data line and the power line, a gate of the first thin film transistor is connected to the gate line, and a source of the first thin film transistor is connected to the data line, the first film The drain of the transistor is connected to the power line via the storage capacitor, the gate of the second thin film transistor is connected to the drain of the first thin film transistor, and the drain of the second thin film transistor is connected to the anode of the light emitting structure and The touch conductive structure, the source of the second thin film transistor is connected to the power line. The organic electroluminescent touch display panel of claim 6, wherein at least one of the first thin film transistor and the second thin film transistor is a low temperature polycrystalline thin film transistor. The organic electroluminescent touch display panel of claim 6, wherein the driving structure further comprises a gate insulating layer, a first isolation layer group, a second isolation layer group and a passivation layer, the first film The transistor and the second thin film transistor comprise a channel layer, the first isolation layer group is disposed on the first substrate, the channel layer is disposed on the first isolation layer group, and the gate insulating layer is disposed on the On the channel layer, the gate is disposed on the gate insulating layer, the second isolation layer is disposed on the gate and the gate insulating layer, and the source and the drain are disposed on the second isolation layer And connecting to the channel layer through the via holes in the second isolation layer group, the passivation layer is disposed on the source, the drain, and the second isolation layer group, and the anode is disposed on the passivation layer Connected to the drain through a via hole in the passivation layer, the organic light emitting layer and the cathode are sequentially disposed on the anode . The organic electroluminescent touch display panel of claim 6, wherein the gate line, the data line, and the power line are respectively connected to the flexible circuit board via a signal transmission line. The organic electroluminescent touch display panel of claim 1, wherein the plurality of pixels are arranged in a matrix on a plane, and the first conductive line and the second conductive line are adjacently disposed and both edges are adjacent to each other. Extending the direction of the pixel matrix row, the first conductive line corresponding to at least one row of pixels and connected to an anode of the light emitting structure of one of the row pixels, the second conductive line corresponding to at least one row of pixels and drawn with the line An anode connection of one of the light-emitting structures. The organic electroluminescent touch display panel of claim 10, wherein at least one row of pixels corresponding to the first conductive line is defined as a first row of pixel groups, and the second conductive line is defined At least one row of pixels is a second row of pixels, the first row of pixels and the second row of pixels includes a first end and a second end opposite the first end, the first conductive line is connected An anode of an outermost pixel illumination structure of the first end of the first row of pixel groups, the second conductive line connecting an anode of the outermost pixel of the second row of pixels of the second row of pixels . The organic electroluminescent touch display panel of claim 1, wherein the first conductive line and the second conductive line are comb-shaped, and the comb of the first conductive line and the second The comb-like staggered engagement of the conductive lines. The organic electroluminescent touch display panel of claim 1, wherein the organic electroluminescent touch display panel is a top-emitting organic electroluminescent touch display panel, and the organic light emitting layer is emitted The optical fibers are sequentially provided to the panel viewer via the drive structure.