TWI688094B - Light emitting device - Google Patents

Abstract

A light emitting device includes a first electrode, a second electrode, an organic layer, and an isolation layer. The organic layer is between the first electrode and the second electrode. The isolation layer is in the organic layer, between the second electrode and the organic layer, or between the first electrode and the organic layer. The light emitting device is divided into a displaying region and a non-displaying region. The isolation layer is at the non-displaying region.

Description

Light emitting device

The present invention relates to a light-emitting device, and particularly to a light-emitting device for the edge of a display area of a display panel.

There is a display panel with a display area and a non-display area. The display area includes a plurality of light-emitting devices, each light-emitting device includes a light-emitting layer and a corresponding active element, each light-emitting layer can form a pixel, and these light-emitting layers It will be arranged to form a pixel array, and this pixel array can be used to display images. In some applications, the display panel or its display area may be rounded or have rounded edges. Such a display panel is applied to a smart watch, for example, the display area of the display panel on the smart watch can be rounded according to the shape of the watch body, and the non-display area is circular around the display area.

According to the display panel of the prior art, since the light-emitting layer of the existing light-emitting device is rectangular, the light-emitting devices arranged at the edge of the display area will cause the image edge presented by the display area to appear jagged. The user will see the jagged edges of the image and cause a poor user experience.

At least one embodiment of the present invention provides a light-emitting device to prevent the edges of the image displayed in the display area of the display panel from being jagged.

At least one embodiment of the present invention provides a light-emitting device including a first electrode, a second electrode, an organic layer, and a barrier layer. The organic layer is located between the first electrode and the second electrode, The barrier layer is located in the organic layer, between the second electrode and the organic layer or between the first electrode and the organic layer. The light emitting device is divided into a display area and a non-display area, and the barrier layer is located in the non-display area.

At least one embodiment of the present invention provides a light-emitting device that includes a first electrode, a second electrode, and an organic layer, and the organic layer is located between the first electrode and the second electrode. The light-emitting device is divided into a display area and a non-display area, and the thickness of the organic layer in the non-display area is smaller than the thickness of the organic layer in the display area.

In summary, according to various embodiments of the present invention, the light-emitting device can be disposed at the edge of the display area of the display panel, and the thickness of the non-display area by the barrier layer at the non-display area or by the organic layer is less than that of the organic layer at The thickness of the display area is designed so that the light-emitting devices arranged at the edge of the display area can partially emit light and not partially emit light, and the boundary between the light-emitting device and the non-light-emitting device can correspond to the shape of the edge of the display area, thereby avoiding the display area The edges of the image appear jagged and improve the user experience.

The following describes in detail the detailed features and advantages of the present invention in the embodiments. The content is sufficient for anyone familiar with the relevant technology to understand and implement the technical content of the present invention, and according to the content disclosed in this specification, the scope of patent application and the drawings Anyone who is familiar with related technologies can easily understand the purpose and advantages of the present invention.

10: Display panel

11: Display area

12: Non-display area

100, 100a: light-emitting device

110: substrate

120: Active components

121: first conductor layer

122: the first insulating layer

123: channel layer

124: second conductor layer

125: second insulating layer

131: First electrode

132: Second electrode

140: Organic layer

141: Luminous layer

142: Auxiliary layer

1421: The first transport layer

1422, 1422a: Second transport layer

150: pixel definition layer

160, 160a: barrier layer

D: Jiji

D1, D2: thickness

EIL: electron injection layer

ETL: electron transport layer

G: gate

HIL: hole injection layer

HTL: hole transport layer

MA: mask

ND: normal direction

S: source

1 is a schematic top view of a display panel according to an embodiment of the present invention; FIG. 2 is a partially enlarged schematic view of the circled portion of FIG. 1; FIG. 3 is a schematic cross-sectional view taken along line 3-3 of FIG. 1 , Which shows the light emitting device of the first embodiment of the present invention; 4 is a schematic cross-sectional view of a light emitting device according to a second embodiment of the present invention; FIG. 5 is a schematic cross-sectional view of a light emitting device according to a third embodiment of the present invention; FIG. 6 is a light emitting device according to a fourth embodiment of the present invention 7 is a schematic cross-sectional view of a light emitting device according to a fifth embodiment of the invention; FIG. 8 is a schematic cross-sectional view of a light emitting device according to a sixth embodiment of the invention; FIG. 9 is a seventh embodiment of the invention 10 is a schematic top view of a vapor deposition process of a display panel according to an embodiment of the present invention; FIG. 11 is a schematic partial cross-sectional view 1 of the display panel of FIG. 10; FIG. 12 is a 10 is a partial cross-sectional schematic view of the display panel of FIG. 10; FIG. 13 is a top schematic view of the display panel evaporation process of another embodiment of the present invention; FIG. 14 is a partial cross-sectional schematic view of the display panel of FIG. 13; and 15 is a second schematic partial cross-sectional view of the display panel of FIG. 13.

Please refer to FIGS. 1 and 2. FIG. 1 is a schematic top view of a display panel 10 according to an embodiment of the present invention. FIG. 2 is a partially enlarged schematic view of a circled portion of FIG. 1. As shown in FIGS. 1 and 2, in this embodiment, the display panel 10 is divided into a display area 11 and a non-display area 12, and the display panel 10 includes a plurality of light emitting devices 100, 100a, and the light emitting devices 100, 100a are arranged in an array . The display area 11 is circular, and the non-display area 12 surrounds the display area 11, but is not limited thereto. The light-emitting device 100 a is located in the display area 11, and the light-emitting device 100 is located at the edge of the display area 11, that is, the boundary between the display area 11 and the non-display area 12, and the edge of the display area 11 will be rounded.

Please refer to FIG. 3, which is a schematic cross-sectional view taken along line 3-3 of FIG. 1, which shows the light emitting devices 100 and 100a of the first embodiment of the present invention. As shown in FIG. 3, in this embodiment, The light-emitting devices 100 and 100a are disposed on the substrate 110, and each light-emitting device 100 and 100a is respectively connected to the corresponding active element 120. Each light emitting device 100, 100a includes a first electrode 131, a second electrode 132, and an organic layer 140, the organic layer 140 is located between the first electrode 131 and the second electrode 132, and a pixel is provided between each light emitting device 100, 100a The definition layer 150 and the pixel definition layer 150 separate the first electrode 131 and the second electrode 132 of the light-emitting devices 100 and 100 a from the organic layer 140 to form a plurality of pixels.

As shown in FIG. 3, in this embodiment, the first electrode 131 of each light-emitting device 100, 100a is connected to the corresponding active element 120, and the active element 120 can apply a specific voltage to the corresponding light-emitting device 100, 100a, so that the light-emitting device The organic layers 140 of 100 and 100a emit light. The difference between the light-emitting device 100 and the light-emitting device 100a is that the light-emitting device 100 is located at the junction of the display area 11 and the non-display area 12, so the light-emitting device 100 itself is correspondingly divided into the display area 11 and the non-display area 12, in addition, the light-emitting device 100 further includes a barrier layer 160 that is located in the non-display area 12.

In this embodiment, the location in the display area 11 may be defined as overlapping with the display area 11 and not in the non-display area 12 in the normal direction ND of the substrate 110; the location in the non-display area 12 may be defined as, It overlaps the non-display area 12 and does not overlap the display area 11 in the normal direction ND of the substrate 110. In other words, as shown in FIG. 3, the barrier layer 160 of the light emitting device 100 overlaps the non-display area 12 and does not overlap the display area 11 in the normal direction ND of the substrate 110.

As shown in FIG. 3, in this embodiment, the barrier layer 160 of the light-emitting device 100 is located between the second electrode 132 and the organic layer 140. In some embodiments, the barrier layer 160 of the light emitting device 100 may be located in the organic layer 140. In some embodiments, the barrier layer 160 of the light emitting device 100 may be located between the first electrode 131 and the organic layer 140.

As shown in FIGS. 2 and 3, when the active device 120 applies a specific voltage to the first electrode 131, the organic layer 140, and the second electrode 132 of the light emitting device 100a, current flows through the first electrode 131, the organic layer 140 of the light emitting device 100a With the second electrode 132, the organic layer 140 is excited to emit light. However, since the light emitting device 100 located at the non-display area 12 is blocked by the blocking layer 160, when the active device 120 applies the same specific voltage to the first electrode 131, the organic layer 140, and the second electrode 132 of the light emitting device 100, the current is only The first electrode 131, the organic layer 140, and the second electrode 132 of the light emitting device 100 are located in the display area 11, and the first electrode 131, the organic layer 140, and the second electrode 132 of the light emitting device 100 are not located in the non-display Part of District 12. In this way, from a top-view perspective as shown in FIGS. 1 and 2, only the portion of the organic layer 140 of the light-emitting device 100 located in the display area 11 emits light, while the portion located in the non-display area 12 does not emit light. As shown in FIG. 2, the light-emitting device 100 located at the boundary between the display area 11 and the non-display area 12 will correspond to the shape of the edge of the display area 11 and part (the portion located in the non-display area 12) will not emit light, so when the display area 11 When displaying an image, the edges of the image will not appear jagged.

In this embodiment, the barrier layer 160 is made of insulating material. For example, the barrier layer 160 may include silicon oxide (SiOx), and the thickness of the barrier layer 160 may be between one nanometer and one thousand nanometers, but is not limited thereto. Due to the relationship of the barrier layer 160, the second electrode 132 covering the barrier layer 160 may swell due to the presence of the barrier layer 160. However, in practical applications, since the thicknesses of the first electrode 131, the organic layer 140, the second electrode 132, and the barrier layer 160 are relatively thin, if viewed from the naked eye, the display panel 10 as a whole still presents a flat surface.

As shown in FIG. 3, in this embodiment, the organic layer 140 includes an emissive layer (EML) 141 and an auxiliary layer 142. The emissive layer 141 can be excited to emit light, and the auxiliary layer 142 is used to assist in conducting the first The electrode 131 and the second electrode 132 enable the active element 120 to be applied oppositely A lower voltage is applied to the first electrode 131, the organic layer 140, and the second electrode 132 of the light-emitting devices 100, 100a, so that the light-emitting layer 141 emits light. In other words, the auxiliary layer 142 can be used to reduce the energy level difference between the first electrode 131/second electrode 132 and the light emitting layer 141, so that holes/electrons can be more easily injected into the light emitting layer from the first electrode 131/second electrode 132 141, causing the light emitting layer 141 to emit light.

In this embodiment, the blocking layer 160 of the light emitting device 100 is located between the second electrode 132 and the auxiliary layer 142 to prevent holes/electrons from being injected into the light emitting layer 141 from the first electrode 131/second electrode 132. In some embodiments, the barrier layer 160 of the light emitting device 100 may be located in the auxiliary layer 142. In some embodiments, the barrier layer 160 of the light emitting device 100 may be located between the first electrode 131 and the auxiliary layer 142. In some embodiments, the barrier layer 160 of the light emitting device 100 may be located between the light emitting layer 141 and the auxiliary layer 142.

As shown in FIG. 3, in this embodiment, the auxiliary layer 142 includes a first transmission layer 1421 and a second transmission layer 1422, and the light emitting layer 141 is located between the first transmission layer 1421 and the second transmission layer 1422. For example, the first transport layer 1421 may be a hole transport layer (HTL), and the second transport layer 1422 may be an electron transport layer (ETL), and the first electrode 131 is an anode. The second electrode 132 is a cathode, but it is not limited thereto. The first transmission layer 1421 can reduce the energy level difference between the first electrode 131 and the light-emitting layer 141, so that holes are more easily injected into the light-emitting layer 141 from the first electrode 131; and the second transmission layer 1422 can reduce the second electrode 132 to The energy level difference between the light-emitting layers 141 makes it easier for electrons to be injected into the light-emitting layer 141 from the second electrode 132.

As shown in FIG. 3, in this embodiment, the active device 120 includes a first conductor layer 121, a first insulating layer 122, a channel layer 123, a second conductor layer 124 and a second insulating layer 125. The first conductor layer 121 is formed on the substrate 110 and patterned to form the gate G, and the first insulating layer 122 is formed on the substrate 110 and the first conductor layer 121. The channel layer 123 is formed on the first insulating layer 122, and the channel layer 123 is made of a semiconductor material, for example. The second conductor layer 124 is formed on the channel layer 123 and patterned to form the source electrode S and the drain electrode D, and the second insulating layer 125 is formed on the first insulating layer 122 and the second conductor layer 124. The first electrode 131 passes through the second insulating layer 125 and is connected to the corresponding drain D.

In this embodiment, the light-emitting layers 141 of the light-emitting devices 100 and 100a may be a red light-emitting layer (REML), a green light-emitting layer (GEML), and a blue light-emitting layer (BEML), respectively. The light emitting devices 100, 100a having a red light emitting layer can emit red light, the light emitting devices 100, 100a having a green light emitting layer can emit green light, and the light emitting devices 100, 100a having a blue light emitting layer can emit blue light.

Please refer to FIGS. 4 and 5. FIG. 4 is a schematic cross-sectional view of the light emitting devices 100 and 100 a according to the second embodiment of the present invention. FIG. 5 is a schematic cross-sectional view of the light emitting devices 100 and 100 a according to the third embodiment of the present invention. The difference between the light emitting devices 100 and 100a of FIG. 4 and FIG. 3 is that the barrier layer 160 of the light emitting device 100 of FIG. 4 is located between the second transmission layer 1422 and the light emitting layer 141. The difference between the light-emitting devices 100 and 100 a of FIG. 5 and FIG. 3 is that the barrier layer 160 of the light-emitting device 100 of FIG. 5 is located between the first transmission layer 1421 and the first electrode 131. The light-emitting device 100 of FIGS. 4 and 5 can also use the barrier layer 160 so that the portion of the organic layer 140 located in the non-display area 12 does not emit light.

Please refer to FIG. 6, which is a schematic cross-sectional view of a light emitting device 100, 100a according to a fourth embodiment of the present invention. The difference between the light-emitting devices 100 and 100a of FIG. 6 and FIG. 3 is that the first transmission layer 1421 of each light-emitting device 100 and 100a of FIG. 6 includes a hole injection layer (HIL) HIL and a hole transmission layer HTL. The second transport layer 1422 includes an electron injection layer (EIL) EIL and an electron transport layer ETL. As shown in Figure 6, in In this embodiment, the light emitting layer 141 is located between the hole transport layer HTL and the electron transport layer ETL, the hole injection layer HIL is located between the first electrode 131 and the hole transport layer HTL, and the electron injection layer EIL is located on the second electrode 132 and the electron transport layer ETL. The hole injection layer HIL and the hole transport layer HTL can reduce the energy level difference between the first electrode 131 and the light emitting layer 141, making it easier for holes to be injected into the light emitting layer 141 from the first electrode 131; and the electron injection layer EIL and electrons The transmission layer ETL can reduce the energy level difference between the second electrode 132 and the light-emitting layer 141, so that electrons are more easily injected into the light-emitting layer 141 from the second electrode 132.

Please refer to FIG. 7, which is a schematic cross-sectional view of a light emitting device 100, 100a according to a fifth embodiment of the present invention. The light emitting device 100a of FIG. 7 and FIG. 3 are the same, and the difference between the light emitting device 100 of FIG. 7 and FIG. 3 is that the light emitting device 100 of FIG. 7 does not have the barrier layer 160. On the contrary, the light emitting device 100 of FIG. By extracting the portion of the organic layer 140 located in the non-display area 12 or reducing the thickness of the portion of the organic layer 140 located in the non-display area 12, the energy level difference of the portion of the organic layer 140 of the light emitting device 100 located in the non-display area 12 is increased by This makes the portion of the organic layer 140 of the light-emitting device 100 located in the display area 11 and the portion of the non-display area 12 have different energy levels. In this case, when the active element 120 applies a specific voltage to the organic layer 140 of the light emitting device 100, the portion of the organic layer 140 of the light emitting device 100 located in the display area 11 emits light, but the portion located in the non-display area 12 does not emit light. Its structure and principle are detailed as follows.

As shown in FIG. 7, in this embodiment, each light-emitting device 100, 100 a includes a first electrode 131, a second electrode 132 and an organic layer 140, and the organic layer 140 is located between the first electrode 131 and the second electrode 132. The light-emitting device 100 is located at the junction of the display area 11 and the non-display area 12, so the light-emitting device 100 can also be correspondingly divided into the display area 11 and the non-display area 12. Moreover, the thickness D1 of the organic layer 140 of the light-emitting device 100 in the non-display area 12 is smaller than that of the organic layer 140 in the display area 11 Thickness D2. Due to the different thicknesses, the difference in energy level between the portion of the organic layer 140 in the display area 11 and the portion of the non-display area 12 is different, and accordingly, the portion of the organic layer 140 in the display area 11 and the portion of the non-display area 12 are excited and The voltage threshold required for light emission is also different. For example, if a specific voltage is greater than the voltage threshold required for the organic layer 140 of the light-emitting device 100 located in the display area 11 to be excited and emit light, but less than the organic layer 140 of the light-emitting device 100 located in the non-display area 12 is excited to emit light The required voltage threshold. In this case, when the active device 120 applies the specific voltage to the organic layer 140 of the light-emitting device 100, only the portion of the organic layer 140 of the light-emitting device 100 located in the display area 11 emits light, but it does not cause The portion of the organic layer 140 located in the non-display area 12 emits light. Therefore, when the light-emitting device 100 of FIG. 7 is arranged at the edge of the display area 11, that is, at the boundary between the display area 11 and the non-display area 12, the light-emitting device 100 can also correspond to the shape of the edge of the display area 11 without partially emitting light. When the display area 11 displays an image, the edges of the image will not appear jagged.

As shown in FIG. 7, in this embodiment, the organic layer 140 of each light-emitting device 100, 100 a includes a light-emitting layer 141 and an auxiliary layer 142, and the thickness of the auxiliary layer 142 of the light-emitting device 100 in the non-display area 12 is smaller than the auxiliary layer 142 Due to the thickness of the display area 11, correspondingly, the thickness D1 of the organic layer 140 of the light-emitting device 100 in the non-display area 12 is also smaller than the thickness D2 of the organic layer 140 in the display area 11. As described above, since the auxiliary layer 142 can be used to reduce the energy level difference between the first electrode 131/second electrode 132 and the light-emitting layer 141, holes/electrons can be easily removed from the first electrode at a relatively low voltage. The electrode 131/second electrode 132 is injected into the light-emitting layer 141 to cause the light-emitting layer 141 to emit light. Therefore, the smaller the thickness of the auxiliary layer 142, the greater the energy level difference between the first electrode 131/second electrode 132 and the light emitting layer 141, and accordingly, the holes/electrons need to be at a relatively high voltage Only then can the first electrode 131 / the second electrode 132 be injected into the light emitting layer 141. Due to the difference in thickness of the auxiliary layer 142, when the active device 120 applies a specific voltage to the organic layer 140 of the light emitting device 100, only the light emitting device The portion of the light-emitting layer 141 in the display area 11 emits light, but the portion of the light-emitting layer 141 in the non-display area 12 does not emit light.

As shown in FIG. 7, in this embodiment, the auxiliary layer 142 includes a first transmission layer 1421 and a second transmission layer 1422, and the light emitting layer 141 is located between the first transmission layer 1421 and the second transmission layer 1422. For example, the first transport layer 1421 may be a hole transport layer HTL, and the second transport layer 1422 may be an electron transport layer ETL, and the first electrode 131 is an anode, and the second electrode 132 is a cathode, but is not limited thereto . The first transmission layer 1421 can reduce the energy level difference between the first electrode 131 and the light-emitting layer 141, so that holes are more easily injected into the light-emitting layer 141 from the first electrode 131; and the second transmission layer 1422 can reduce the second electrode 132 to The energy level difference between the light-emitting layers 141 makes it easier for electrons to be injected into the light-emitting layer 141 from the second electrode 132. In some embodiments, at least one of the first transmission layer 1421 and the second transmission layer 1422 of the light-emitting device 100 does not extend beyond the non-display area 12 to improve the portion of the organic layer 140 of the light-emitting device 100 located in the non-display area 12 Energy level difference.

As shown in FIG. 7, in this embodiment, the first transmission layer 1421 of the light-emitting device 100 is located in the display area 11 and the non-display area 12, but the second transmission layer 1422 of the light-emitting device 100 is only located in the display area 11 without extending Non-display area 12. In this situation, compared with the display area 11, electrons require a larger voltage to be injected into the light emitting layer 141 of the light emitting device 100 in the non-display area 12 from the second electrode 132. Since the second transmission layer 1422 of the light emitting device 100 is only located in the display area 11 and does not extend to the non-display area 12, when the active device 120 applies a specific voltage to the organic layer 140 of the light emitting device 100, only the light emitting layer of the light emitting device 100 The portion of 141 located in the display area 11 emits light, but the portion of the light-emitting layer 141 located in the non-display area 12 does not emit light.

Please refer to FIG. 8. FIG. 8 is a schematic cross-sectional view of a light emitting device 100, 100a according to a sixth embodiment of the present invention. The difference between the light-emitting devices 100 and 100a of FIG. 8 and FIG. 7 is that the light emission of FIG. 8 The second transmission layer 1422 of the device 100 is located in the display area 11 and the non-display area 12, but the first transmission layer 1421 of the light emitting device 100 is only located in the display area 11 and does not extend beyond the non-display area 12. The light-emitting device 100 of FIG. 8 can also use the first transmission layer 1421 of the light-emitting device 100 to be located only in the display area 11 without extending to the non-display area 12 so that the portion of the light-emitting layer 141 located in the non-display area 12 does not emit light. In some embodiments, the first transmission layer 1421 and the second transmission layer 1422 of the light-emitting device 100 may both be located only in the display area 11 and neither extend beyond the non-display area 12.

Please refer to FIG. 9, which is a schematic cross-sectional view of a light emitting device 100, 100a according to a seventh embodiment of the present invention. The difference between the light-emitting devices 100, 100a of FIG. 9 and FIG. 7 is that the first transmission layer 1421 of each light-emitting device 100, 100a of FIG. 9 includes a hole injection layer HIL and a hole transmission layer HTL, and the second transmission layer 1422 includes The electron injection layer EIL and the electron transport layer ETL. As shown in FIG. 9, in this embodiment, the light emitting layer 141 is located between the hole transport layer HTL and the electron transport layer ETL, the hole injection layer HIL is located between the first electrode 131 and the hole transport layer HTL, and the electrons The injection layer EIL is located between the second electrode 132 and the electron transport layer ETL. The hole injection layer HIL and the hole transport layer HTL can reduce the energy level difference between the first electrode 131 and the light emitting layer 141, making it easier for holes to be injected into the light emitting layer 141 from the first electrode 131; and the electron injection layer EIL and electrons The transmission layer ETL can reduce the energy level difference between the second electrode 132 and the light-emitting layer 141, so that electrons are more easily injected into the light-emitting layer 141 from the second electrode 132.

As shown in FIG. 9, in this embodiment, the first transmission layer 1421 of the light-emitting device 100 has the same thickness in the display area 11 and the non-display area 12, but the second transmission layer 1422 of the light-emitting device 100 is in the non-display area 12 The thickness D1 is smaller than the thickness D2 of the second transmission layer 1422 in the display area 11. In this way, when the active device 120 applies a specific voltage to the organic layer 140 of the light-emitting device 100, only the light-emitting layer 141 of the light-emitting device 100 located in the display area 11 emits light, but does not cause the light-emitting layer 141 to emit light The non-display area 12 emits light. In some embodiments, the thickness of the second transmission layer 1422 of the light-emitting device 100 in the display area 11 and the non-display area 12 is the same, but the thickness of the first transmission layer 1421 of the light-emitting device 100 in the non-display area 12 is smaller than that of the first transmission layer 1421 is the thickness of the display area 11. In some embodiments, the thickness of the first transmission layer 1421 and the second transmission layer 1422 in the non-display area 12 of the light emitting device 100 are both smaller than the thickness of the first transmission layer 1421 and the second transmission layer 1422 in the display area 11. In some embodiments, at least one of the hole injection layer HIL, the hole transport layer HTL, the electron injection layer EIL, and the electron transport layer ETL of the light emitting device 100 is not located in the non-display area 12.

As shown in FIG. 9, in this embodiment, the hole injection layer HIL, the hole transport layer HTL and the electron transport layer ETL of the light emitting device 100 are located in the display area 11 and the non-display area 12, and the electron injection layer of the light emitting device 100 The EIL is only located in the display area 11 but not in the non-display area 12. Accordingly, the thickness D1 of the second transmission layer 1422 of the light-emitting device 100 in the non-display area 12 is smaller than the thickness D2 of the second transmission layer 1422 in the display area 11. In some embodiments, the electron transport layer ETL of the light emitting device 100 may be located only in the display area 11 and not in the non-display area 12. In some embodiments, the hole transport layer HTL of the light emitting device 100 may be located only in the display area 11 and not in the non-display area 12. In some embodiments, the hole injection layer HIL of the light emitting device 100 may be located only in the display area 11 and not in the non-display area 12. In some embodiments, only one of the four layers of the hole injection layer HIL, the hole transport layer HTL, the electron injection layer EIL, and the electron transport layer ETL of the light emitting device 100 is located in the display area 11 and the non-display area 12 at the same time The other three layers are only located in the display area 11 and not in the non-display area 12. In some embodiments, the four layers of the hole injection layer HIL, the hole transport layer HTL, the electron injection layer EIL, and the electron transport layer ETL of the light emitting device 100 are only located in the display area 11 and not in the non-display area 12.

Please refer to FIGS. 10 to 12. FIG. 10 is a display panel 10 according to an embodiment of the invention. A schematic top view of the evaporation process. FIG. 11 is a schematic partial cross-sectional diagram 1 of the display panel 10 of FIG. 10, and FIG. 12 is a schematic partial cross-sectional diagram 2 of the display panel 10 of FIG. 10. 10 to 12 are used to explain the formation of the barrier layer 160 of FIG. 3. After the display panel 10 completes the preparation of the second transmission layer 1422 and before the preparation of the second electrode 132, a vapor deposition process of the barrier layer 160 is performed. As shown in FIGS. 10 and 11, in this process, the display area 11 is covered with the mask MA, and the non-display area 12 is exposed outside the mask MA. Next, as shown in FIG. 12, an insulating material is vapor-deposited to the display panel 10 by a vapor deposition method (refer to arrows in the figure), so that the barrier layers 160 and 160 a are formed on the mask MA and the second transmission between the non-display area 12 On layer 1422. After removing the mask MA and the barrier layer 160a thereon, only the barrier layer 160 on the second transmission layer 1422 of the non-display area 12 will be left. Then, the second electrode 132 is prepared, and the display panel 10 shown in FIG. 3 can be formed.

In some embodiments, if the barrier layer 160 is located between the light-emitting layer 141 and the second transmission layer 1422 (as shown in FIG. 4 ), the second transmission layer may be performed after the display panel 10 completes the preparation of the light-emitting layer 141 Before the preparation of 1422, the evaporation process of the above-mentioned barrier layer 160 is performed. In some embodiments, if the barrier layer 160 is located between the first electrode 131 and the first transmission layer 1421 (as shown in FIG. 5 ), the first electrode 131 can be prepared after the display panel 10 is completed Before the preparation of the transmission layer 1421, the above-mentioned vapor deposition process of the barrier layer 160 is performed.

Please refer to FIGS. 13 to 15. FIG. 13 is a schematic top view of a vapor deposition process of a display panel 10 according to another embodiment of the present invention. FIG. 14 is a partial cross-sectional schematic diagram 1 of the display panel 10 of FIG. 13. A second schematic partial cross-sectional view of the display panel 10. 13 to 15 are used to explain the formation of the second transmission layer 1422 of FIG. 7. As shown in FIGS. 13 and 14, after the display panel 10 completes the preparation of the light-emitting layer 141, the non-display area 12 is covered with the mask MA, and the display area 11 It is exposed outside the mask MA. Next, as shown in FIG. 15, the second transfer layer 1422 is vapor-deposited to the display panel 10 by vapor deposition (see arrows in the figure), so that the second transfer layers 1422 and 1422 a are formed on the mask MA and the display area 11 On the light emitting layer 141. After removing the mask MA and the second transmission layer 1422a thereon, only the second transmission layer 1422 on the light-emitting layer 141 of the display area 11 will remain. In addition, through existing processes such as exposure, etching, and deposition, a pixel definition layer 150 can be formed between the first transmission layer 1421, the light-emitting layer 141, and the second transmission layer 1422 to define each pixel, which will not be repeated here. Then, the second electrode 132 is prepared to form the display panel 10 shown in FIG. 7.

In some embodiments, if the first transmission layer 1421 is located only in the display area 11 and not in the non-display area 12 (as shown in FIG. 8 ), the display panel 10 may be masked after the preparation of the first electrode 131 is completed The cover MA covers the non-display area 12 and performs the above-mentioned evaporation process to form the first transmission layer 1421.

In summary, according to various embodiments of the present invention, the light-emitting device can be disposed at the edge of the display area of the display panel, and the thickness of the non-display area by the barrier layer at the non-display area or by the organic layer is less than that of the organic layer at The thickness of the display area is designed so that the light-emitting devices arranged at the edge of the display area can partially emit light and not partially emit light, and the boundary between the light-emitting device and the non-light-emitting device can correspond to the shape of the edge of the display area, thereby avoiding the display area The edges of the image appear jagged and improve the user experience.

Although the technical content of the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Anyone who is familiar with this technology and makes some changes and retouching without departing from the spirit of the present invention should cover the present invention. The scope of protection of the present invention shall be subject to the scope of the attached patent application.

10: Display panel

11: Display area

12: Non-display area

100, 100a: light-emitting device

110: substrate

120: Active components

121: first conductor layer

122: the first insulating layer

123: channel layer

124: second conductor layer

125: second insulating layer

131: First electrode

132: Second electrode

140: Organic layer

141: Luminous layer

142: Auxiliary layer

1421: The first transport layer

1422: Second transport layer

150: pixel definition layer

160: barrier layer

D: Jiji

G: gate

ND: normal direction

S: source

Claims (5)

A light-emitting device includes: a first electrode and a second electrode; and an organic layer between the first electrode and the second electrode, wherein the light-emitting device is divided into a display area and a non-display area, and The thickness of the organic layer in the non-display area is smaller than the thickness of the organic layer in the display area. The light-emitting device according to claim 1, wherein the organic layer includes a light-emitting layer and an auxiliary layer, and the thickness of the auxiliary layer in the non-display area is smaller than the thickness of the auxiliary layer in the display area. The light-emitting device according to claim 1, wherein the auxiliary layer includes a first transmission layer and a second transmission layer, the light-emitting layer is located between the first transmission layer and the second transmission layer, and the first transmission The thickness of the layer in the non-display area is less than the thickness of the first transmission layer in the display area or the thickness of the second transmission layer in the non-display area is less than the thickness of the second transmission layer in the display area. The light emitting device according to claim 3, wherein the first transport layer includes a hole injection layer and a hole transport layer, the second transport layer includes an electron injection layer and an electron transport layer, and the light emitting layer is located at the Between the hole transport layer and the electron transport layer, the hole injection layer is located between the first electrode and the hole transport layer, and the electron injection layer is located between the second electrode and the electron transport layer, wherein At least one of the hole injection layer, the hole transport layer, the electron injection layer and the electron transport layer is not located in the non-display area. The light-emitting device according to claim 2, wherein the auxiliary layer includes a first transmission layer and a second transmission layer, and the light-emitting layer is located between the first transmission layer and the second transmission layer, wherein the first At least one of the transmission layer and the second transmission layer does not extend to the non-display area.

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