CN114551560A - Display device - Google Patents

Abstract

A display device comprises a first substrate, a sub-pixel structure, a second substrate, a shading pattern layer, a first insulating layer, a reflecting layer and a second insulating layer. The sub-pixel structure is arranged on the first substrate. The shading pattern layer is arranged on the second substrate and is provided with an opening. The openings of the shading pattern layer are overlapped with the sub-pixel structures. The first insulating layer is disposed on the light-shielding pattern layer and has an opening. The opening of the first insulating layer is arranged outside the opening of the shading pattern layer. The first insulating layer has sidewalls defining an opening of the first insulating layer. The reflecting layer is at least arranged on the side wall of the first insulating layer. The second insulating layer is at least arranged in the opening of the first insulating layer and covers the reflecting layer.

Description

Display device

Technical Field

The present disclosure relates to optoelectronic devices, and particularly to a display device.

Background

Display devices are classified into non-self-luminous display devices and self-luminous display devices according to the characteristics of display media. The display panel of the non-self-luminous display device needs to be matched with the backlight module to display. The self-luminous display device does not need to be matched with a backlight module. Therefore, compared to non-self-light emitting display devices, self-light emitting display devices have the advantage of being light and thin, and are more suitable for some products, such as: smart watches, smart phones, and the like.

In general, an opposite substrate of a self-luminous display device has a light-shielding pattern layer (or called black matrix) to prevent a plurality of sub-pixel structures for displaying different colors from mixing. However, the arrangement of the light-shielding pattern layer can limit the viewing angle of the self-light-emitting display device while avoiding light mixing, and the brightness in the large viewing angle direction is lowered.

In addition, for the self-luminous display device emitting light upward, the common electrode of the pixel array substrate is made of a transparent conductive material. The conductivity of the light-transmitting conductive material is low. When the size of the self-emitting display device is large, the distance difference between each sub-pixel structure and the signal input end of the common electrode is increased, which causes a serious voltage drop (IR-drop) problem and affects the display quality.

Disclosure of Invention

One of the objectives of the present invention is to provide a display device with good display quality.

Another object of the present invention is to provide another display device with good display quality.

The display device of an embodiment of the invention includes a first substrate, at least one sub-pixel structure, a second substrate, a light-shielding pattern layer, a first insulating layer, a reflective layer, and a second insulating layer. At least one sub-pixel structure is arranged on the first substrate. The second substrate is arranged opposite to the first substrate. The shading pattern layer is arranged on the second substrate and is provided with at least one opening. At least one opening of the shading pattern layer is overlapped with at least one sub-pixel structure. The first insulating layer is disposed on the light-shielding pattern layer and has at least one opening. The at least one opening of the first insulating layer is disposed outside the at least one opening of the light-shielding pattern layer. The first insulating layer has at least one sidewall defining at least one opening of the first insulating layer. The reflecting layer is at least arranged on at least one side wall of the first insulating layer. The second insulating layer is at least arranged in the at least one opening of the first insulating layer and covers the reflecting layer.

In an embodiment of the invention, the reflective layer has at least one first portion and at least one second portion connected to each other, the at least one first portion of the reflective layer is disposed on at least one sidewall of the first insulating layer, and the at least one second portion of the reflective layer is disposed between the light-shielding pattern layer and the second insulating layer.

In an embodiment of the invention, at least a second portion of the reflective layer directly contacts the light-shielding pattern layer.

In an embodiment of the invention, the reflective layer has at least one first portion and at least one second portion connected to each other, the at least one first portion of the reflective layer is disposed on at least one sidewall of the first insulating layer, the at least one second portion of the reflective layer is disposed on a side of the at least one first portion close to the light-shielding pattern layer, and an edge of the at least one second portion of the reflective layer is spaced from an edge of the light-shielding pattern layer by a distance.

In an embodiment of the invention, the second insulating layer has a first portion disposed in the at least one opening of the first insulating layer, the first portion of the second insulating layer has a first surface facing the second substrate and a second surface facing the at least one sidewall of the first insulating layer, and an angle α is formed between the first surface and the second surface in the material of the second insulating layer, where α is greater than 90 °.

In an embodiment of the invention, the at least one sub-pixel structure includes a common electrode, the second insulating layer has at least one first portion disposed in the at least one opening of the first insulating layer, and the display device further includes at least one protrusion structure and the first conductive layer. The at least one protrusion structure is disposed on the at least one first portion of the second insulating layer. The first conductive layer is disposed on the at least one protrusion structure and electrically connected to the reflective layer and the common electrode.

In an embodiment of the invention, a portion of the first conductive layer disposed on the at least one protrusion structure directly contacts the common electrode.

In an embodiment of the invention, the at least one sub-pixel structure further includes at least one first electrode, at least one light-emitting pattern, and a pixel defining layer, the pixel defining layer is disposed on the at least one first electrode and has at least one opening overlapping the at least one first electrode, the at least one light-emitting pattern is disposed in the at least one opening of the pixel defining layer and electrically connected to the first electrode, the pixel defining layer has at least one recess, the common electrode is disposed in the at least one recess of the pixel defining layer and electrically connected to the at least one light-emitting pattern, and the at least one protrusion structure and at least a portion of the first conductive layer are disposed in the at least one recess of the pixel defining layer.

In an embodiment of the invention, the display device further includes an encapsulation layer disposed on the common electrode, wherein a gap exists between the first insulating layer and the encapsulation layer.

In an embodiment of the invention, the display device further includes an encapsulation layer and an adhesive layer. The packaging layer is arranged on the common electrode. The adhesive layer is arranged between the first insulating layer and the packaging layer. At least one protruding structure protrudes out of the adhesive layer.

In an embodiment of the invention, the common electrode has a signal input end, and a disposition density of the at least one protrusion structure at one position far from the signal input end is greater than a disposition density at another position close to the signal input end.

In an embodiment of the invention, the display device further includes a second conductive layer disposed on the light-shielding pattern layer and between the light-shielding pattern layer and the first insulating layer, and having at least one opening overlapping the at least one sub-pixel structure. The second conductive layer, the reflective layer, the first conductive layer and the common electrode are electrically connected to each other.

In an embodiment of the invention, a shape of a vertical projection of the second conductive layer on the second substrate is substantially the same as a shape of a vertical projection of the light-shielding pattern layer on the second substrate.

In an embodiment of the invention, the at least one sub-pixel structure includes a plurality of first light-emitting patterns electrically connected to the common electrode, the at least one opening of the light-shielding pattern layer is a plurality of openings of the light-shielding pattern layer, and the plurality of first light-emitting patterns are electrically connected to each other and respectively overlapped with the plurality of openings of the light-shielding pattern layer. The display device also comprises an encapsulation layer and an adhesive layer. The packaging layer is arranged on the at least one sub-pixel structure. The adhesive layer is arranged between the first insulating layer and the packaging layer. A gap exists between the first insulating layer and the packaging layer and is overlapped with one of the first light-emitting patterns, and the adhesive layer is overlapped with the other of the first light-emitting patterns.

In an embodiment of the invention, the common electrode has a signal input end, and the arrangement density of the voids at one position far from the signal input end is greater than that at another position near the signal input end.

In an embodiment of the invention, the at least one sub-pixel structure includes a first sub-pixel structure and a second sub-pixel structure, the first sub-pixel structure and the second sub-pixel structure respectively include a first light emitting pattern and a second light emitting pattern, the at least one opening of the first insulating layer includes a first opening and a second opening respectively corresponding to the first light emitting pattern and the second light emitting pattern, the at least one sidewall of the first insulating layer includes a first sidewall and a second sidewall respectively defining the first opening and the second opening of the first insulating layer, the reflective layer includes a plurality of first refractive index sub-layers and a plurality of second refractive index sub-layers which are alternately stacked, and the plurality of first refractive index sub-layers and the plurality of second refractive index sub-layers are disposed on the first sidewall and the second sidewall.

In an embodiment of the invention, the at least one sub-pixel structure includes a first sub-pixel structure and a second sub-pixel structure, the first sub-pixel structure and the second sub-pixel structure respectively include a first light emitting pattern and a second light emitting pattern, the at least one opening of the first insulating layer includes a first opening and a second opening respectively corresponding to the first sub-pixel structure and the second sub-pixel structure, and the at least one sidewall of the first insulating layer includes a first sidewall and a second sidewall respectively defining the first opening and the second opening of the first insulating layer. The reflective layer comprises a plurality of first refractive index sub-layers and a plurality of second refractive index sub-layers which are alternately stacked and arranged on the first side wall. The reflective layer further comprises a plurality of third refractive index sub-layers and a plurality of fourth refractive index sub-layers which are alternately stacked and arranged on the second side wall.

In an embodiment of the invention, the first light-emitting pattern and the second light-emitting pattern are respectively configured to emit a first color light and a second color light, and the reflectivity of the plurality of first refractive index sub-layers and the plurality of second refractive index sub-layers to the first color light is higher than the reflectivity to the second color light.

The display device of an embodiment of the invention includes a first substrate, a sub-pixel structure, a second substrate, a light-shielding pattern layer, a protrusion, a reflective layer and a first insulating layer. The sub-pixel structure is disposed on the first substrate. The second substrate is arranged opposite to the first substrate. The shading pattern layer is arranged on the second substrate and is provided with an opening overlapped with the sub-pixel structure. The protrusion is disposed on the light-shielding pattern layer and protrudes from the second substrate to the first substrate, wherein the protrusion has a sidewall adjacent to the opening of the light-shielding pattern layer. The reflecting layer is at least arranged on the side wall of the protruding structure. The first insulating layer covers the reflecting layer and is overlapped with the opening of the shading pattern layer.

In an embodiment of the invention, the protrusion has a first surface facing the second substrate, a sidewall of the protrusion faces the first insulating layer, and an angle β is formed between the first surface and the sidewall in a material of the protrusion, and β is smaller than or equal to 90 °.

Drawings

Fig. 1 is a schematic cross-sectional view of a display device according to an embodiment of the invention.

Fig. 2 is a schematic top view of a display device according to an embodiment of the invention.

Fig. 3 is a schematic cross-sectional view of a display device according to an embodiment of the invention.

Fig. 4 is a schematic cross-sectional view of a display device according to an embodiment of the invention.

Fig. 5 is a schematic top view of a display device according to an embodiment of the invention.

Fig. 6 is a schematic top view of a display device according to an embodiment of the invention.

Fig. 7 is a schematic cross-sectional view of a display device according to an embodiment of the invention.

Fig. 8 is a schematic cross-sectional view of a display device according to an embodiment of the invention.

Fig. 9 is a schematic top view of a display device according to an embodiment of the invention.

Fig. 10 is a schematic cross-sectional view of a display device according to an embodiment of the invention.

Fig. 11 is a schematic cross-sectional view of a display device according to an embodiment of the invention.

Fig. 12 is a schematic cross-sectional view of a display device according to an embodiment of the invention.

The reference numbers are as follows:

10. 10A, 10B, 10C, 10D, 10E, 10F display device

100 pixel array substrate

110 first substrate

120 sub-pixel circuit

130 first electrode

140 pixel definition layer

140a, 220a, 240a, 280a opening

141 first sub-pixel definition layer

142 second sub-pixel definition layer

142a is a recess

150 light emitting pattern

150R first color filter pattern

150G second color filter pattern

150B third color filter pattern

160 common electrode

170 encapsulation layer

200 opposite substrate

210 second substrate

220 light shielding pattern layer

220e edge

220a-1 first opening

220a-2 second opening

220 a-3. third opening

230 color filter pattern

230R first color filter pattern

230G second color filter pattern

230B third color filter pattern

240. 240E first insulating layer

242. 294a side wall

242-1 first side wall

242-2 second side wall

242-3 third side wall

250. 250C, 250E reflective layer

250a first refractive index sublayer

250b second refractive index sub-layer

250c third refractive index sublayer

250d fourth refractive index sublayer

250e fifth refractive index sublayer

250f sixth refractive index sublayer

251. 261 first part

252. 262 the second part

252e edge

260 second insulating layer

261a first surface

261b second surface

270 adhesive layer

272 sticking pattern

280 second conductive layer

290 raised structure

292 first conductive layer

294, a bulge

294b first surface

AG-void

C, composite common electrode

D is the distance

DBR1 first distributed Bragg reflector

DBR2 second distributed Bragg reflector

DBR3 third distributed Bragg reflector

L is a light beam

L1 first color light

L2 color II

L3 color III

OVSS signal input terminal

PX pixel structure

P is the pitch

SPX sub-pixel structure

SPX1 first sub-pixel Structure

SPX2 second sub-pixel Structure

SPX3 third sub-pixel Structure

W is width

Angle of alpha, beta, theta

Angle of divergence

I-I ', II-II', III-III ', IV-IV', V-V

Detailed Description

Reference will now be made in detail to exemplary embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings and the description to refer to the same or like parts.

It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements present. As used herein, "connected" may refer to physical and/or electrical connections. Further, "electrically connected" or "coupled" may mean that there are additional elements between the elements.

As used herein, "about", "approximately", or "substantially" includes the stated value and the average value within an acceptable range of deviation of the specified value as determined by one of ordinary skill in the art, taking into account the measurement in question and the specified amount of error associated with the measurement (i.e., the limitations of the measurement system). For example, "about" may mean within one or more standard deviations of the stated value, or within ± 30%, ± 20%, ± 10%, ± 5%. Further, as used herein, "about", "approximately" or "substantially" may be selected based on optical properties, etch properties, or other properties, with a more acceptable range of deviation or standard deviation, and not all properties may be applied with one standard deviation.

Unless defined otherwise, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present invention and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Fig. 1 is a schematic cross-sectional view of a display device 10 according to an embodiment of the invention.

Fig. 2 is a schematic top view of a display device 10 according to an embodiment of the invention.

FIG. 1 corresponds to section line I-I' of FIG. 2. Fig. 2 shows the light-shielding pattern layer 220, the plurality of light-emitting patterns 150 and the adhesive layer 270 of the display device 10, and other components of the display device 10 are omitted.

Referring to fig. 1, a display device 10 includes a pixel array substrate 100 and an opposite substrate 200 disposed opposite to each other. The pixel array substrate 100 includes a first base 110. For example, in the present embodiment, the material of the first substrate 110 can be glass, quartz, organic polymer, or an opaque/reflective material (e.g., a wafer, a ceramic, or other suitable materials), or other suitable materials.

The pixel array substrate 100 further includes a plurality of sub-pixel structures SPX disposed on the first substrate 110. Each sub-pixel structure SPX includes at least one first electrode 130, a common electrode 160, and at least one light-emitting pattern 150, wherein the at least one first electrode 130 and the common electrode 160 are electrically connected to the at least one light-emitting pattern 150, respectively, and the at least one light-emitting pattern 150 is configured to emit a light beam L.

In the present embodiment, each sub-pixel structure SPX further includes a sub-pixel circuit 120 electrically connected to at least one first electrode 130. For example, in the present embodiment, the sub-pixel circuit 120 may include a data line (not shown), a scan line (not shown), a power line (not shown), a first transistor (not shown), a second transistor (not shown), and a capacitor (not shown), wherein a first end of the first transistor is electrically connected to the data line, a control end of the first transistor is electrically connected to the scan line, a second end of the first transistor is electrically connected to the control end of the second transistor, a first end of the second transistor is electrically connected to the power line, the capacitor is electrically connected to the second end of the first transistor and the first end of the second transistor, and a second end of the second transistor is electrically connected to the at least one first electrode 130. However, the invention is not limited thereto, and in other embodiments, the sub-pixel circuit 120 may be other circuits.

In addition, in the present embodiment, each sub-pixel structure SPX further optionally includes a pixel definition layer 140. The pixel defining layer 140 has at least one opening 140a overlapping the at least one first electrode 130. The at least one light emitting pattern 150 may be disposed in the at least one opening 140a of the pixel defining layer 140. For example, in the present embodiment, the material of the light emitting pattern 150 is, for example, an organic light emitting material, and the display device 10 may be an organic electroluminescent display. However, the invention is not limited thereto, and in other embodiments, the material of the light emitting pattern 150 may also be an inorganic light emitting material, and the display device 10 may also be an inorganic electroluminescent display, such as but not limited to: micro light emitting diode (μ LED) displays.

In the present embodiment, the common electrode 160 is a light-transmitting electrode, which includes metal oxides, such as: indium tin oxide, indium zinc oxide, aluminum tin oxide, aluminum zinc oxide, indium germanium zinc oxide, or other suitable oxide, or a stack of at least two of the foregoing, but the invention is not limited thereto.

Referring to fig. 1 and fig. 2, in the present embodiment, the plurality of sub-pixel structures SPX may include a first sub-pixel structure SPX1, a second sub-pixel structure SPX2, and a third sub-pixel structure SPX3 for emitting a first color light L1, a second color light L2, and a third color light L3, respectively. The first sub-pixel structure SPX1, the second sub-pixel structure SPX2, and the third sub-pixel structure SPX3 that are adjacent to each other may constitute a pixel structure PX. For example, in the present embodiment, the first color light L1, the second color light L2, and the third color light L3 are, for example, a red light beam, a green light beam, and a blue light beam, respectively, but the invention is not limited thereto.

Referring to fig. 1, in the present embodiment, the pixel array substrate 100 further includes a package layer 170 disposed on the common electrode 160 of the sub-pixel structure SPX. For example, in the present embodiment, the Encapsulation layer 170 may be a high molecular polymer with Encapsulation Film (TFE), but the invention is not limited thereto.

The opposite substrate 200 includes a second base 210 disposed opposite to the first base 110. For example, in the present embodiment, the material of the second substrate 210 may be glass, quartz, organic polymer, or other suitable materials.

The opposite substrate 200 further includes a light-shielding pattern layer 220. The light shielding pattern layer 220 may also be referred to as a Black Matrix (BM). The light-shielding pattern layer 220 is disposed on the second substrate 210 and has an opening 220 a. The opening 220a of the light shielding pattern layer 220 overlaps the sub-pixel structure SPX. In detail, the opening 220a of the light-shielding pattern layer 220 overlaps the light-emitting pattern 150 of the sub-pixel structure SPX.

In the present embodiment, the opposite substrate 200 may further selectively include a plurality of colors

The color filter pattern 230 is disposed on the second substrate 210 and overlaps the opening 220a of the light-shielding pattern layer 220. In the present embodiment, the plurality of color filter patterns 230 may include a first color filter pattern 230R, a second color filter pattern 230G and a third color filter pattern 230B respectively disposed above the first light emitting pattern 150R of the first sub-pixel structure SPX1, the second light emitting pattern 150G of the second sub-pixel structure SPX2 and the third light emitting pattern 150B of the third sub-pixel structure SPX 3. For example, in the present embodiment, the first color filter pattern 230R, the second color filter pattern 230G and the third color filter pattern 230B may be a red filter pattern, a green filter pattern and a blue filter pattern, respectively, but the invention is not limited thereto.

The opposite substrate 200 further includes a first insulating layer 240 disposed on the light-shielding pattern layer 220 and having an opening 240 a. The opening 240a of the first insulating layer 240 is disposed outside the opening 220a of the light-shielding pattern layer 220. The opening 240a of the first insulating layer 240 overlaps the entity of the light-shielding pattern layer 220. The first insulating layer 240 has sidewalls 242 defining an opening 240 a.

The opposite substrate 200 further includes a reflective layer 250 at least disposed on the sidewall 242 defining the opening 240a of the first insulating layer 240. In detail, in the present embodiment, the reflective layer 250 has a first portion 251 and a second portion 252 connected to each other. The first portion 251 of the reflective layer 250 is disposed on the sidewall 242 of the first insulating layer 240. The second portion 252 of the reflective layer 250 is disposed between the light-shielding pattern layer 220 and (the first portion 261 of) the second insulating layer 260. In short, the reflective layer 250 is conformally disposed in the opening 240a of the first insulating layer 240. In addition, in the embodiment, the second portion 252 of the reflective layer 250 may directly contact the light-shielding pattern layer 220, but the invention is not limited thereto.

In the present embodiment, an edge 252e of the second portion 252 of the reflective layer 250 is separated from an edge 220e of the light-shielding pattern layer 220 by a distance D. The vertical projection of the reflective layer 250 on the second substrate 210 does not exceed the vertical projection of the light-shielding pattern layer 220 on the second substrate 210. In other words, the reflective layer 250 is disposed under the light-shielding pattern layer 220 and is not exposed out of the light-shielding pattern layer 220. In the present embodiment, the material of the reflective layer 250 is, for example, metal, but the invention is not limited thereto.

In the present embodiment, the opposite substrate 200 further includes a second insulating layer 260 at least disposed in the opening 240a of the first insulating layer 240 and covering the reflective layer 250. In the embodiment, the second insulating layer 260 has a first portion 261 disposed in the opening 240a of the first insulating layer 240, the first portion 261 of the second insulating layer 260 has a first surface 261a facing the second substrate 210 and a second surface 261b facing the sidewall 242 of the first insulating layer 240, and the first surface 261a and the second surface 261b form an angle α within the material of the second insulating layer 260, where α is greater than 90 °. In the present embodiment, the second insulating layer 260 further optionally has a second portion 262, and the second portion 262 is disposed on the first insulating layer 240 and overlaps the opening 220a of the light-shielding pattern layer 220.

In the present embodiment, the opposite substrate 200 further includes an adhesive layer (filler)270 disposed between the first insulating layer 240 and the package layer 170. The opposite substrate 200 and the pixel array substrate 100 are connected to each other through an adhesive layer 270. The reflective layer 250 is located between the first insulating layer 240 and the second insulating layer 260. The second insulating layer 260 is located between the reflective layer 250 and the adhesive layer 270. The adhesive layer 270 is located between the second insulating layer 260 and the encapsulation layer 170.

It is worth mentioning that it has a large divergence angle

The light beam L transmitted to the light shielding pattern layer 220 cannot exit from the inside of the display device 10, but the light beam L is guided to the opening 220a of the light shielding pattern layer 220 by the reflection layer 250 through the reflection function of the reflection layer 250 and exits at a large angle θ. Thereby, the luminance of the display device 10 in the large viewing angle direction can be increased.

It should be noted that the following embodiments follow the reference numerals and parts of the contents of the foregoing embodiments, wherein the same reference numerals are used to indicate the same or similar elements, and the description of the same technical contents is omitted. For the description of the omitted portions, reference may be made to the foregoing embodiments, which will not be repeated below.

Fig. 3 is a schematic cross-sectional view of a display device 10A according to an embodiment of the invention.

Fig. 4 is a schematic cross-sectional view of a display device 10A according to an embodiment of the invention.

Fig. 5 is a schematic top view of a display device 10A according to an embodiment of the invention.

Fig. 3 corresponds to the section line II-II' of fig. 5. Fig. 4 corresponds to the section line III-III' of fig. 5. Fig. 5 shows the light-shielding pattern layer 220, the second conductive layer 280, the protrusion structure 290, the plurality of light-emitting patterns 150 and the adhesive layer 270 of the display device 10A, and other components of the display device 10A are omitted.

The display device 10A of fig. 3, 4 and 5 is similar to the display device 10 of fig. 1 and 2, with the main difference: the display device 10A of fig. 3, 4, and 5 further includes: a second conductive layer 280, a bump structure 290 and a first conductive layer 292.

Referring to fig. 3, fig. 4 and fig. 5, the opposite substrate 200 further includes a bump structure 290 and a first conductive layer 292. The protrusion structure 290 is disposed on the first portion 261 of the second insulating layer 260 and protrudes toward the pixel array substrate 100. The first conductive layer 292 is disposed on the protrusion structure 290 and electrically connected to the reflective layer 250 and the common electrode 160. In other words, a portion of the first conductive layer 292 on the protrusion 290 is used as a bridging element between the reflective layer 250 of the opposite substrate 200 and the common electrode 160 of the pixel array substrate 100. In the embodiment, a portion of the first conductive layer 292 disposed on the protrusion structure 290 may directly contact the common electrode 160, but the invention is not limited thereto.

Referring to fig. 3 and 4, in the present embodiment, the pixel defining layer 140 may have a recess 142a, the common electrode 160 is disposed in the recess 142a of the pixel defining layer 140 and electrically connected to the light emitting pattern 150, and the protruding structure 290 of the opposite substrate 200 and a portion of the first conductive layer 292 disposed on the protruding structure 290 are disposed in the recess 142 a. The recess 142a of the pixel defining layer 140 facilitates the protrusion structure 290 of the opposite substrate 200 and a portion of the first conductive layer 292 disposed on the protrusion structure 290 to be stably disposed on the pixel array substrate 100, so as to well electrically connect the reflective layer 250 of the opposite substrate 200 and the common electrode 160 of the pixel array substrate 100.

For example, in the present embodiment, the pixel defining layer 140 may include a first sub-pixel defining layer 141 and a second sub-pixel defining layer 142 disposed on the first sub-pixel defining layer 141, the first sub-pixel defining layer 141 and the second sub-pixel defining layer 142 jointly define an opening 140a overlapping the first electrode 130, and the second sub-pixel defining layer 142 has a recess 142a overlapping the protrusion structure 290, but the invention is not limited thereto.

It should be noted that, in the present embodiment, the common electrode 160 is transparent, and the transparent common electrode 160 can be made of a material with a relatively high resistivity, but the common electrode 160 with a relatively high resistivity can be electrically connected to the reflective layer 250 with a low resistivity through a portion of the first conductive layer 292 disposed on the protrusion structure 290. Therefore, the resistance of the composite common electrode C including the common electrode 160 and the reflective layer 250 can be reduced, which is helpful to improve the voltage drop (IR-drop) problem caused by the over-high resistance of the common electrode 160, thereby improving the display quality.

Referring to fig. 3 and 5, in the present embodiment, the opposite substrate 200 further includes a second conductive layer 280 disposed on the light-shielding pattern layer 220 and between the light-shielding pattern layer 220 and the first insulating layer 240, and having an opening 280a overlapping the sub-pixel structure SPX. In the present embodiment, a shape of a vertical projection of the second conductive layer 280 on the second substrate 210 and a shape of a vertical projection of the light-shielding pattern layer 220 on the second substrate 210 may be selectively substantially the same. For example, in the embodiment, the vertical projection of the second conductive layer 280 on the second substrate 210 and the vertical projection of the light-shielding pattern layer 220 on the second substrate 210 may both be mesh patterns, but the invention is not limited thereto.

Referring to fig. 3, in the present embodiment, the reflective layer 250 can be electrically connected to the second conductive layer 280 through the opening 240a of the first insulating layer 240. In the present embodiment, the second conductive layer 280, the reflective layer 250, the first conductive layer 292 and the common electrode 160 are electrically connected to each other, so as to form a composite common electrode C. In the present embodiment, the resistivity of the second conductive layer 280 is also smaller than that of the common electrode 160 in addition to the reflective layer 250. By the second conductive layer 280 electrically connected to the common electrode 160, the resistance of the composite common electrode C can be further reduced, and the voltage drop (IR-drop) problem can be further improved.

Referring to fig. 3, fig. 4 and fig. 5, in the present embodiment, in order to make a portion of the first conductive layer 292 on the protrusion structure 290 of the opposite substrate 200 better electrically connect with the common electrode 160 of the pixel array substrate 100, the adhesive layer 270 may not be disposed in a portion of the display device 10. That is, in a partial region, a gap (air gap) AG may exist between the first insulating layer 240 of the opposite substrate 200 and the encapsulation layer 170 of the pixel array substrate 100. In addition, in another partial region, an adhesive layer 270 may still be disposed between the first insulating layer 240 of the opposite substrate 200 and the encapsulation layer 170 of the pixel array substrate 100 to maintain the connection between the pixel array substrate 100 and the opposite substrate 200.

For example, in the present embodiment, the same sub-pixel structure SPX may include a plurality of light-emitting patterns 150, the plurality of light-emitting patterns 150 of the same sub-pixel structure SPX are respectively overlapped with the plurality of openings 220a of the light-shielding pattern layer 220, the plurality of light-emitting patterns 150 of the same sub-pixel structure SPX are electrically connected to each other, the plurality of light-emitting patterns 150 of the same sub-pixel structure SPX are electrically connected to the same sub-pixel circuit 120, one of the light-emitting patterns 150 is overlapped with the adhesive layer 270, and the other light-emitting pattern 150 is overlapped with the gap AG.

The adhesive layer 270 is disposed to reduce the reflection of the light beam L (please refer to fig. 1) emitted from the light-emitting pattern 150 at the interface inside the display device 10A, so as to increase the light-emitting efficiency of the sub-pixel structure SPX. The gap AG may enable a portion of the first conductive layer 292 on the protruding structure 290 of the opposite substrate 200 to be electrically connected with the common electrode 160 of the pixel array substrate 100 well without being obstructed by the adhesive layer 270. The adhesive layer 270 and the gap AG are respectively disposed on the light-emitting patterns 150 of the same sub-pixel structure SPX, so that the sub-pixel structures SPX have the same or similar light-emitting effect, and the reflective layer 250 (and/or the second conductive layer 280) is electrically connected to the common electrode 160. However, the invention is not limited thereto, and in other embodiments, the gap AG and the adhesive layer 270 may be configured in other manners. In addition, the ratio of the area of the same sub-pixel structure SPX overlapping the gap AG to the area of the same adhesive layer 270 is not limited in the present invention, and the ratio of the area of the same sub-pixel structure SPX overlapping the gap AG to the area of the same adhesive layer 270 can be adjusted according to actual requirements.

Referring to fig. 3, 4 and 5, for example, the common electrode 160 has a signal input terminal OVSS. In the present embodiment, the arrangement density of the bump structures 290 at one position far from the signal input terminal OVSS may be selectively greater than that at another position near the signal input terminal OVSS. In the present embodiment, the arrangement density of the gap AG at one position far from the signal input terminal OVSS may be selectively larger than that at another position near the signal input terminal OVSS. That is, the farther away from the signal input terminal OVSS (i.e., where the voltage drop is more serious), the higher the density of the electrical connection between the first conductive layer 292 of the opposite substrate 200 and the common electrode 160 of the pixel array substrate 100 may be, so as to further optimize the effect of improving the voltage drop (IR-drop).

Referring to fig. 3, in the present embodiment, a portion of the first conductive layer 292 disposed on the protrusion structure 290 beside the adhesion layer 270 may still be electrically connected to the common electrode 160. In the present embodiment, the protruding structure 290 may protrude from the adhesive layer 270, such that a portion of the first conductive layer 292 on the protruding structure 290 is electrically connected to the common electrode 160. However, the invention is not limited thereto, and in other embodiments, the adhesive layer 270 may cover the protrusion structure 290.

Fig. 6 is a schematic top view of a display device 10B according to an embodiment of the invention.

Fig. 6 shows the light-shielding pattern layer 220, the second conductive layer 280, the protrusion structure 290, the plurality of light-emitting patterns 150, and the adhesive layer 270 of the display device 10B, and other components of the display device 10B are omitted.

The display device 10B of fig. 6 is similar to the display device 10A of fig. 5, with the difference that: the formation position of the adhesive layer 270 is slightly different. Referring to fig. 5 and 6, the adhesive layer 270 may include a plurality of adhesive patterns 272. In the embodiment of fig. 5, the pitch P of the spray adhesion pattern 272 is approximately equal to the width W of one pixel structure PX. In the embodiment of fig. 6, the pitch P of the spray adhesion pattern 272 is approximately equal to the width W of the n pixel structures PX, where n is a positive integer greater than or equal to 2. Fig. 6 illustrates that n is 2 (i.e., the pitch P of the adhesion pattern 272 is approximately equal to the width W of the 2 pixel structures PX), but the present invention is not limited thereto.

Fig. 7 is a schematic cross-sectional view of a display device 10C according to an embodiment of the invention.

Fig. 8 is a schematic cross-sectional view of a display device 10C according to an embodiment of the invention.

Fig. 9 is a schematic top view of a display device 10C according to an embodiment of the invention.

Fig. 7 corresponds to the section line IV-IV' of fig. 9. Fig. 8 corresponds to the section line V-V' of fig. 9. Fig. 9 shows the light-shielding pattern layer 220, the second conductive layer 280, the protrusion structure 290, the plurality of light-emitting patterns 150 and the adhesive layer 270 of the display device 10C of fig. 7 and 8, while other components of the display device 10C of fig. 7 and 8 are omitted.

The display device 10C of fig. 7, 8 and 9 is similar to the display device 10A of fig. 3, 4 and 5, with the difference that: the reflective layer 250C of the display device 10C is different from the reflective layer 250 of the display device 10A.

Referring to fig. 7, 8 and 9, in the present embodiment, the plurality of sub-pixel structures SPX include a first sub-pixel structure SPX1, a second sub-pixel structure SPX2 and a third sub-pixel structure SPX3, the first sub-pixel structure SPX1, the second sub-pixel structure SPX2 and the third sub-pixel structure SPX3 respectively include a first light-emitting pattern 150R, a second light-emitting pattern 150G and a third light-emitting pattern 150B, the opening 220a of the first insulating layer 240 includes a first opening 220a-1, a second opening 220a-2 and a third opening 220a-3 respectively corresponding to the first sub-pixel structure SPX1, the second sub-pixel structure SPX2 and the third sub-pixel structure SPX3, the sidewalls 242 of the first insulating layer 240 include a first sidewall 242-1, a second sidewall 242-2 and a third sidewall 242-3 that define the first opening 220a-1, the second opening 220a-2 and the third opening 220a-3, respectively.

In the present embodiment, the reflective layer 250C includes a plurality of first refractive index sublayers 250a and a plurality of second refractive index sublayers 250b, which are alternately stacked and disposed on the first sidewall 242-1. The refractive index of the plurality of first refractive index sublayers 250a is different from the refractive index of the plurality of second refractive index sublayers 250 b. The alternately stacked plurality of first and second refractive index sub-layers 250a and 250b may form a first distributed bragg reflector DBR 1. The first distributed bragg reflector DBR1 is used for reflecting the first color light L1 emitted by the first sub-pixel structure SPX 1.

In the present embodiment, the reflective layer 250C further includes a plurality of third refractive index sub-layers 250C and a plurality of fourth refractive index sub-layers 250d, which are alternately stacked and disposed on the second sidewall 242-2. The refractive index of the plurality of third refractive index sublayers 250c is different from the refractive index of the plurality of fourth refractive index sublayers 250 d. The alternately stacked plurality of third refractive index sub-layers 250c and plurality of fourth refractive index sub-layers 250d may form the second distributed bragg reflector DBR 2. The second dispersive bragg reflector DBR2 is configured to reflect the second color light L2 emitted from the second sub-pixel structure SPX 2.

In the present embodiment, the reflective layer 250C further includes a plurality of fifth refractive index sub-layers 250e and a plurality of sixth refractive index sub-layers 250f, which are alternately stacked and disposed on the third sidewalls 242-3. The refractive index of the fifth refractive index sublayers 250e is different from the refractive index of the sixth refractive index sublayers 250 f. The alternately stacked plurality of fifth refractive index sub-layers 250e and plurality of sixth refractive index sub-layers 250f may form the third distributed bragg reflector DBR 3. The third distributed bragg reflector DBR3 is used for reflecting the third color light L3 emitted by the third sub-pixel structure SPX 3.

In the present embodiment, the first refractive index sublayer 250a and the plurality of second refractive index sublayers 250b (i.e., the first distributed bragg reflector DBR1) have a reflectivity for the first color light L1 higher than a reflectivity for the second color light L2. In the present embodiment, the reflectivity of the third refractive index sub-layers 250c and the fourth refractive index sub-layers 250d (i.e., the second distributed bragg reflector DBR2) for the second color light L2 is higher than the reflectivity for the first color light L1. In the present embodiment, the reflectivity of the fifth and sixth refractive index sublayers 250e and 250f (i.e., the third distributed bragg reflector DBR3) for the third color light L3 is higher than that for the second color light L2.

In the present embodiment, the refractive indexes and/or thicknesses of the first refractive index sublayer 250a, the second refractive index sublayer 250b, the third refractive index sublayer 250C, the fourth refractive index sublayer 250d, the fifth refractive index sublayer 250e and/or the sixth refractive index sublayer 250f are adjusted, so that the reflective layer 250C can improve the reflectivity of the first color light L1, the second color light L2 and the third color light L3 with different wavelengths.

In the present embodiment, the materials of the first, second, third, fourth, fifth and sixth refractive index sub-layers 250a, 250b, 250c, 250d, 250e and 250f are electrically conductive. For example, the materials of the first, second, third, fourth, fifth and sixth refractive index sub-layers 250a, 250b, 250c, 250d, 250e and 250f may include metal oxide, but the invention is not limited thereto.

Fig. 10 is a schematic cross-sectional view of a display device 10D according to an embodiment of the invention. The display device 10D of fig. 10 is similar to the display device 10C of fig. 7, and the difference therebetween is that: in the embodiment of fig. 10, a plurality of first refractive index sub-layers 250a and a plurality of second refractive index sub-layers 250b are disposed on the first, second and third sidewalls 242-1, 242-2 and 242-3 corresponding to the first, second and third sub-pixel structures SPX1, SPX2 and SPX3, respectively. In other words, in the present embodiment, the first sub-pixel structure SPX1, the second sub-pixel structure SPX2, and the third sub-pixel structure SPX3 share the same first distributed bragg reflector DBR1, and the process of the opposite substrate 200 of the display device 10D is simpler than that of the opposite substrate 200 of the display device 10C.

Fig. 11 is a schematic cross-sectional view of a display device 10E according to an embodiment of the invention. The display device 10E of fig. 11 is similar to the display device 10 of fig. 1, with the difference that: the counter substrate 200E of the display device 10E of fig. 11 is different from the counter substrate 200 of the display device 10 of fig. 1.

Referring to fig. 11, in the embodiment, the opposite substrate 200E includes a second base 210, a light-shielding pattern layer 220, a protrusion 294, a reflective layer 250E and a first insulating layer 240E. The light-shielding pattern layer 220 is disposed on the second substrate 210 and has an opening 220a overlapping the sub-pixel structure SPX. The protrusion 294 is disposed on the light-shielding pattern layer 220 and protrudes from the second substrate 210 to the first substrate 110. The protrusion 294 has a sidewall 294a adjacent to the opening 220a of the light-shielding pattern layer 220. The reflective layer 250E is disposed at least on the side walls 294a of the protrusions 294. The first insulating layer 240E covers the reflective layer 250E and overlaps the opening 220a of the light-shielding pattern layer 220. In the embodiment, the protrusion 294 has a first surface 294b facing the second substrate 210, a sidewall 294a of the protrusion 294 faces the first insulating layer 240E, and the first surface 294b and the sidewall 294a form an angle β in the material of the protrusion 294, where β is less than 90 °.

Fig. 12 is a schematic cross-sectional view of a display device 10F according to an embodiment of the invention. The display device 10F of fig. 12 is similar to the display device 10E of fig. 11, and the difference therebetween is that: in the embodiment of fig. 12, the first surface 294b and the sidewall 294a form an angle β with the material of the protrusion 294, and β is substantially equal to 90 °.

Similarly, the display device 10E of FIG. 11 and the display device 10F of FIG. 12 can have a large divergence angle by the reflective layer 250E on the protrusions 294

The light beam L transmitted to the light shielding pattern layer 220 is guided to the opening 220a of the light shielding pattern layer 220 and emitted at a large angle θ. Thereby, the luminance of the display devices 10E, 10F in the large viewing angle direction can be increased.

Claims (20)

1. A display device, comprising:

a first substrate;

at least one sub-pixel structure disposed on the first substrate;

a second substrate disposed opposite to the first substrate;

a light-shielding pattern layer disposed on the second substrate and having at least one opening, wherein the at least one opening of the light-shielding pattern layer overlaps the at least one sub-pixel structure;

a first insulating layer disposed on the light-shielding pattern layer and having at least one opening, wherein the at least one opening of the first insulating layer is disposed outside the at least one opening of the light-shielding pattern layer, and the first insulating layer has at least one sidewall defining the at least one opening of the first insulating layer;

a reflective layer at least disposed on the at least one sidewall of the first insulating layer; and

the second insulating layer is at least arranged in the at least one opening of the first insulating layer and covers the reflecting layer.

2. The display device according to claim 1, wherein the reflective layer has at least one first portion and at least one second portion connected to each other, the at least one first portion of the reflective layer is disposed on the at least one sidewall of the first insulating layer, and the at least one second portion of the reflective layer is disposed between the light-shielding pattern layer and the second insulating layer.

3. The display device according to claim 1, wherein the at least one second portion of the reflective layer is in direct contact with the light-shielding pattern layer.

4. The display device according to claim 1, wherein the reflective layer has at least one first portion and at least one second portion connected to each other, the at least one first portion of the reflective layer is disposed on the at least one sidewall of the first insulating layer, the at least one second portion of the reflective layer is disposed on a side of the at least one first portion close to the light-shielding pattern layer, and an edge of the at least one second portion of the reflective layer is spaced apart from an edge of the light-shielding pattern layer.

5. The display device according to claim 1, wherein the second insulating layer has a first portion disposed in the at least one opening of the first insulating layer, the first portion of the second insulating layer has a first surface facing the second substrate and a second surface facing the at least one sidewall of the first insulating layer, and the first surface and the second surface form an angle α within the material of the second insulating layer, and α >90 °.

6. The display device of claim 1, wherein the at least one sub-pixel structure comprises a common electrode, the second insulating layer has at least a first portion disposed in the at least one opening of the first insulating layer, the display device further comprising:

at least one protruding structure disposed on the at least one first portion of the second insulating layer; and

a first conductive layer disposed on the at least one protrusion structure and electrically connected to the reflective layer and the common electrode.

7. The display device according to claim 6, wherein a portion of the first conductive layer disposed on the at least one protrusion structure directly contacts the common electrode.

8. The display device according to claim 6, wherein the at least one sub-pixel structure further comprises at least one first electrode, at least one light-emitting pattern and a pixel defining layer disposed on the at least one first electrode and having at least one opening overlapping the at least one first electrode, the at least one light-emitting pattern is disposed in the at least one opening of the pixel defining layer and electrically connected to the first electrode, the pixel defining layer has at least one recess, the common electrode is disposed in the at least one recess of the pixel defining layer and electrically connected to the at least one light-emitting pattern, and the at least one protrusion structure and at least a portion of the first conductive layer are disposed in the at least one recess of the pixel defining layer.

9. The display device of claim 6, further comprising:

and a packaging layer arranged on the common electrode, wherein a gap is formed between the first insulating layer and the packaging layer.

10. The display device of claim 6, further comprising:

a packaging layer disposed on the common electrode; and

an adhesive layer disposed between the first insulating layer and the packaging layer;

wherein the at least one protrusion structure protrudes from the adhesive layer.

11. The display device according to claim 6, wherein the common electrode has a signal input terminal, and the at least one protrusion structure is disposed at a position farther from the signal input terminal with a density greater than that of another position closer to the signal input terminal.

12. The display device of claim 6, further comprising:

a second conductive layer disposed on the light-shielding pattern layer, located between the light-shielding pattern layer and the first insulating layer, and having at least one opening overlapping the at least one sub-pixel structure;

wherein the second conductive layer, the reflective layer, the first conductive layer and the common electrode are electrically connected to each other.

13. The display device according to claim 12, wherein a shape of a perpendicular projection of the second conductive layer on the second substrate is the same as a shape of a perpendicular projection of the light blocking pattern layer on the second substrate.

14. The display device according to claim 6, wherein the at least one sub-pixel structure comprises a plurality of first light-emitting patterns electrically connected to the common electrode, the at least one opening of the light-shielding pattern layer is a plurality of openings of the light-shielding pattern layer, a plurality of the first light-emitting patterns are electrically connected to each other and respectively overlap the plurality of openings of the light-shielding pattern layer, the display device further comprising:

a packaging layer disposed on the at least one sub-pixel structure; and

an adhesive layer disposed between the first insulating layer and the packaging layer;

wherein a gap exists between the first insulating layer and the packaging layer and overlaps one of the first light-emitting patterns, and the adhesive layer overlaps another of the first light-emitting patterns.

15. The display device of claim 14, wherein the common electrode has a signal input end, and the arrangement density of the voids is greater at one position away from the signal input end than at another position close to the signal input end.

16. The display device of claim 1, wherein the at least one sub-pixel structure comprises a first sub-pixel structure and a second sub-pixel structure, the first sub-pixel structure and the second sub-pixel structure respectively comprise a first light emitting pattern and a second light emitting pattern, the at least one opening of the first insulating layer comprises a first opening and a second opening corresponding to the first light emitting pattern and the second light emitting pattern, respectively, the at least one sidewall of the first insulating layer comprises a first sidewall and a second sidewall defining the first opening and the second opening of the first insulating layer, respectively, the reflective layer comprises a plurality of first refractive index sub-layers and a plurality of second refractive index sub-layers, which are alternately stacked, and the plurality of first refractive index sub-layers and the plurality of second refractive index sub-layers are disposed on the first sidewall and the second sidewall.

17. The display device according to claim 1, wherein the at least one sub-pixel structure comprises a first sub-pixel structure and a second sub-pixel structure, the first sub-pixel structure and the second sub-pixel structure respectively comprise a first light emitting pattern and a second light emitting pattern, the at least one opening of the first insulating layer comprises a first opening and a second opening corresponding to the first sub-pixel structure and the second sub-pixel structure, respectively, the at least one sidewall of the first insulating layer comprises a first sidewall and a second sidewall defining the first opening and the second opening of the first insulating layer, respectively, the reflective layer comprises:

a plurality of first refractive index sub-layers and a plurality of second refractive index sub-layers which are alternately stacked and arranged on the first side wall; and

and a plurality of third refractive index sub-layers and a plurality of fourth refractive index sub-layers which are alternately stacked and arranged on the second side wall.

18. The display device of claim 17, wherein the first and second light-emitting patterns are respectively configured to emit a first color light and a second color light, and the first and second refractive index sub-layers have a higher reflectivity for the first color light than for the second color light.

19. A display device, comprising:

a first substrate;

a sub-pixel structure disposed on the first substrate;

a second substrate disposed opposite to the first substrate;

a shading pattern layer arranged on the second substrate and having an opening overlapped with the sub-pixel structure;

a protrusion disposed on the light-shielding pattern layer and protruding from the second substrate to the first substrate, wherein the protrusion has a sidewall adjacent to the opening of the light-shielding pattern layer;

a reflective layer at least disposed on the sidewall of the protrusion structure; and

a first insulating layer covering the reflective layer and overlapping the opening of the light-shielding pattern layer.

20. The display device of claim 19, wherein the protrusion has a first surface facing the second substrate, the sidewall of the protrusion faces the first insulating layer, and an angle β is formed between the first surface and the sidewall in the material of the protrusion, and β is less than or equal to 90 °.

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