阅读说明：本技术 显示装置 (Display device ) 是由 杨佳瑶 张启沛 于 2020-06-17 设计创作，主要内容包括：本发明提供一种显示装置,通过在光栅结构上形成平坦结构,使位于平坦结构最上方的平坦信号走线不会因光栅结构具有凹凸的上表面,因而不会形成具有光栅排列的平坦信号走线,使光线在入射到所述平坦信号走线时,光线被所述平坦信号走线挡住无法进到光栅结构,并且由于所述平坦信号走线没有形成光栅排列的图案,使入射光线无法产生光栅反射。(The invention provides a display device, which is characterized in that a flat structure is formed on a grating structure, so that a flat signal wire positioned at the top of the flat structure cannot have a concave-convex upper surface due to the grating structure, and therefore, a flat signal wire with grating arrangement cannot be formed, when light enters the flat signal wire, the light is blocked by the flat signal wire and cannot enter the grating structure, and because the flat signal wire does not form a pattern with grating arrangement, the incident light cannot generate grating reflection.)

1. A display device, comprising:

the optical fiber connector comprises a plurality of signal wires which are arranged at equal intervals, wherein each signal wire has a preset height and is used for transmitting an electric signal, and the plurality of signal wires form a grating structure with a concave-convex upper surface; and

the flat structure is arranged on the grating structure and comprises a first flat layer and a first flat signal routing line, the first flat signal routing line is arranged on the first flat layer and used for flattening the first flat signal routing line, the first flat signal routing line is used for transmitting a first signal, and the flat structure is provided with a flat upper surface and used for preventing incident light from being reflected by the grating structure.

2. The display device according to claim 1, wherein: the flat structure further comprises a second flat signal trace arranged between the grating structure and the first flat layer and used for transmitting a second signal and assisting the first flat signal trace in transmitting one of the first signals.

3. The display device according to claim 1, wherein: the first flat layer comprises a first sub flat layer and a second sub flat layer, the second sub flat layer is arranged between the first sub flat layer and the first signal routing, and the flatness of the first flat signal routing is increased by introducing the second sub flat layer.

4. The display device according to claim 2, wherein: the first flat layer comprises a first sub flat layer and a second sub flat layer, the second sub flat layer is arranged between the first sub flat layer and the first signal routing, and the flatness of the first flat signal routing is increased by introducing the second sub flat layer.

5. The display device according to any one of claims 1 to 4, wherein: the flat structure further includes a second flat layer and a third flat signal trace, the second flat layer and the third flat signal trace are sequentially disposed on the first flat signal trace, the second flat layer is used to increase the flatness of the third flat signal trace, and the third flat signal trace is used to transmit a third signal and assist the first flat signal trace in transmitting one of the first signal and the second signal.

6. The display device according to any one of claims 1 to 4, wherein: the display device includes an organic light emitting diode display panel having an anode electrode and a cathode electrode which make a light emitting layer emit light when a bias voltage is applied, the first flat signal trace having the same material as one of the anode electrode and the cathode electrode.

7. The display device according to claim 5, wherein: the display device includes an organic light emitting diode display panel having an anode electrode and a cathode electrode which make a light emitting layer emit light when a bias voltage is applied, and the third flat signal wire has the same material as one of the anode electrode and the cathode electrode.

8. The display device according to any one of claims 1 to 4, wherein: the display device further comprises a protection window which is arranged above the flat structure at a distance and used for protecting the grating structure and the flat structure, the area of the grating structure and the flat structure covered by the protection window is a shading area, when the second flat signal routing is used for assisting the first flat signal routing to transmit the first signal, the first flat signal routing is connected with the second flat signal routing through a first through hole, and the first through hole is correspondingly arranged in the first flat layer on the second flat signal routing in the shading area.

9. The display device according to claim 8, wherein: the first via hole comprises a large opening and a plurality of small openings, the opening with the small aperture of the large opening is large in aperture, and the first flat signal routing is connected with the second flat signal routing through the large opening and the small openings.

10. The display device of claim 1, wherein the grating structure comprises:

the signal routing wires are arranged on the first insulating layer; and

the second insulating layer covers the signal wires, and along with the signal wires with preset height, the second insulating layer enables the second insulating layer to have a concave-convex upper surface.

Technical Field

The invention relates to the technical field of display, in particular to a display device which prevents incident light from generating grating reflection.

Background

With the demand of users for display devices with high screen ratios, large panel manufacturers use a way to minimize the line width and the line distance of signal traces in the display device bezel. However, these signal traces are also easily formed into a pattern with a grating arrangement, and when light is incident, grating reflection is generated due to the grating arrangement pattern, so as to generate bright and dark stripes, which affects the viewing experience of users.

Fig. 1 and fig. 2 are schematic diagrams of different constructive interferences when light is incident on the grating structure 10, respectively. Having the same wavelength λ and incident angle a₁First incident light L₁And the second incident light L₂When incident on the grating structure 10, a diffraction angle a is formed₂First reflected light R of₁And the second reflectionLight R₂. Second incident light L₂Is larger than the first incident light L₁Has an optical path difference dsin (a)₁) First reflected light R₁Is more than the second reflected light R₂Has an optical path difference dsin (a)₂) Thus the first light (including the first incident light L)₁And the first reflected light R₁) And the second light (including the second incident light L)₂And the second reflected light R₂) Has a wave path difference dsin (a)₁)–dsin(a₂) (as shown in FIG. 1), if the angle of diffraction a₂Angle of incidence a₁On the same side, the difference of the two light beams is dsin (a)₁)+dsin(a₂) (as shown in fig. 2), where d is the distance between the grating slits. When the path difference of the two light beams is an integral multiple of the wavelength λ of the light (i.e. dsin (a)₁)±dsin(a₂) M λ, m is an integer), the two rays will interact with each other to form constructive interference, and then bright and dark fringes will be generated.

Therefore, it is necessary to provide a display device to solve the problems of the prior art.

Disclosure of Invention

The invention aims to provide a display device to solve the problems in the prior art.

To achieve the above object, an aspect of the present invention provides a display device including:

the optical fiber connector comprises a plurality of signal wires which are arranged at equal intervals, wherein each signal wire has a preset height and is used for transmitting an electric signal, and the plurality of signal wires form a grating structure with a concave-convex upper surface; and

the flat structure is arranged on the grating structure and comprises a first flat layer and a first flat signal routing line, the first flat signal routing line is arranged on the first flat layer and used for flattening the first flat signal routing line, the first flat signal routing line is used for transmitting a first signal, and the flat structure is provided with a flat upper surface and used for preventing incident light from being reflected by the grating structure.

Further, the flat structure further includes a second flat signal trace disposed between the grating structure and the first flat layer for transmitting a second signal and assisting the first flat signal trace to transmit one of the first signals.

Optionally, the first planarization layer includes a first sub-planarization layer and a second sub-planarization layer, the second sub-planarization layer is disposed between the first sub-planarization layer and the first signal trace, and the planarization of the first planarization signal trace is increased by introducing the second sub-planarization layer.

Optionally, the planar structure further includes a second planar layer and a third planar signal trace, the second planar layer and the third planar signal trace are sequentially disposed on the first planar signal trace, the second planar layer is configured to increase the flatness of the third planar signal trace, and the third planar signal trace is configured to transmit a third signal and assist the first planar signal trace in transmitting one of the first signal and the second signal.

Optionally, the display device comprises an organic light emitting diode display panel having an anode electrode and a cathode electrode which cause a light emitting layer to emit light when a bias voltage is applied, the first flat signal trace being of the same material as one of the anode electrode and the cathode electrode.

Further, the display device includes an organic light emitting diode display panel having an anode electrode and a cathode electrode which make a light emitting layer emit light when a bias voltage is applied, and the third flat signal trace has the same material as one of the anode electrode and the cathode electrode.

The display device further comprises a protection window arranged above the flat structure for a distance to protect the grating structure and the flat structure, an area of the grating structure and the flat structure covered by the protection window is a shading area, when the second flat signal routing is used for assisting the first flat signal routing to transmit the first signal, the first flat signal routing is connected with the second flat signal routing through a first via hole, and the first via hole is correspondingly arranged in the first flat layer on the second flat signal routing in the shading area.

Further, the first via hole includes a large opening and a plurality of small openings, the aperture of the large opening is larger than that of the small opening, and the first flat signal trace is connected to the second flat signal trace through the large opening and the small openings.

Further, the grating structure includes:

the signal routing wires are arranged on the first insulating layer; and

the second insulating layer covers the signal wires, and along with the signal wires with preset height, the second insulating layer enables the second insulating layer to have a concave-convex upper surface.

The flat structure is formed on the grating structure, so that the flat signal wiring at the top of the flat structure cannot form the flat signal wiring with grating arrangement because the grating structure has the concave-convex upper surface, the light is blocked by the flat signal wiring and cannot enter the grating structure when the light enters the flat signal wiring, and the incident light cannot generate grating reflection because the flat signal wiring does not form a grating arrangement pattern.

Drawings

Fig. 1 is a schematic diagram of a first constructive interference principle when light is incident on a grating structure.

Fig. 2 is a schematic diagram of a second constructive interference principle when light is incident on the grating structure.

Fig. 3 is a schematic top view of a display device having a display region, a light leakage region, and a light shielding region according to an embodiment of the invention.

Fig. 4 to 11 are partial side views of the display device along the AA' direction in the light leakage area of fig. 3 according to the first to eighth embodiments of the present invention, respectively.

Fig. 12 is a side view of the display device in the direction BB' in fig. 3 according to the first embodiment of the present invention.

Fig. 13 is a side view of the display device with the first via having a large open hole in the direction BB' in fig. 3 according to the second embodiment of the present invention.

Fig. 14 is a side view of a display device having a first via with a small aperture along the BB' direction in fig. 3 according to a second embodiment of the present invention.

Fig. 15 is a top view of a display device having a first via with a large opening and a small opening according to a second embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The following description of the various embodiments refers to the accompanying drawings, which are included to illustrate embodiments in which the invention may be practiced. The directional terminology used herein is for the purpose of describing particular aspects only and is not intended to be limiting. Accordingly, the directional terms used are used for explanation and understanding of the present invention, and are not used for limiting the present invention.

Referring to fig. 3, fig. 3 is a schematic top view of a display device having a display region, a light leakage region, and a light shielding region according to an embodiment of the invention.

Referring to fig. 3 and 4, fig. 4 is a partial side view of the display device along the AA' direction in the light leakage area of fig. 3 according to the first embodiment of the present invention. The display device comprises a grating structure 11 and a planar structure 12. In the present embodiment, the grating structure 11 includes a first insulating layer 111, a plurality of signal traces 112, and a second insulating layer 113, wherein the plurality of signal traces 112 are disposed on the first insulating layer 111 at equal intervals to form a grating arrangement, and each signal trace 112 has a predetermined height for transmitting an electrical signal; the second insulating layer 113 covers the plurality of signal traces 112, and the second insulating layer 113 forms a concave-convex upper surface on the second insulating layer 112 along with the plurality of signal traces 112 having a predetermined height, that is, the plurality of signal traces 112 form a concave-convex upper surface on the grating structure 11.

Referring to fig. 3 and 4, the flat structure 12 is disposed on the grating structure 11 and includes a first flat layer 121 and a first flat signal trace 122, the first flat signal trace 122 is disposed on the first flat layer 121, that is, the first flat layer 121 and the first flat signal trace 122 are sequentially disposed on the second insulating layer 113, the first flat layer 121 is used to planarize the first flat signal trace 122, the first flat signal trace 122 is used to transmit the first signal, and since the first flat layer 121 has a flat upper surface, the first flat signal trace 122 disposed thereon also has a flat upper surface, that is, the flat structure 12 has a flat upper surface, so that the first flat signal trace 122 does not form an upper surface having a grating reflection effect due to the concave and convex upper surface of the grating structure 11, when light is incident on the first flat signal trace 122 having a flat upper surface, the light can be blocked by the first flat signal trace 122 and cannot enter the grating structure 11 (to prevent the incident light from being reflected by the grating structure 11), and the incident light cannot generate grating reflection because the first flat signal trace 122 does not form a concave-convex pattern.

Referring to fig. 3 and 5, fig. 5 is a partial side view of a display device along the AA' direction in the light leakage area of fig. 3 according to a second embodiment of the present invention. Compared to the first embodiment, the planar structure 22 in the second embodiment of the present invention further includes a second planar signal trace 223 disposed between the grating structure 21 and the first planar signal trace 221, that is, the second planar signal trace 223, the first planar layer 221, and the first planar signal trace 222 are sequentially disposed on the second insulating layer 213. The second flat signal trace 223 may be used to transmit the second signal, or the first flat signal trace 222 and the second flat signal trace 223 are connected through the first via hole (described later), so that the second flat signal trace 223 may assist the transmission of the first signal, and increase the conductivity of the first flat signal trace 222 in the process of transmitting the first signal.

Referring to fig. 3 and 6, fig. 6 is a partial side view of the display device in fig. 3 with the light leakage area along the AA' direction according to the third embodiment of the present invention. Compared to the first embodiment, the first planarization layer 321 in the third embodiment of the present invention includes the first sub-planarization layer 3211 and the second sub-planarization layer 3212, the second sub-planarization layer 3212 is disposed between the first sub-planarization layer 3211 and the first planarization signal trace 322, that is, the first sub-planarization layer 3211, the second sub-planarization layer 3212, and the first planarization signal trace 322 are sequentially disposed on the second insulating layer 313.

Referring to fig. 3 and 7, fig. 7 is a partial side view of the display device in fig. 3 with the light leakage area along the AA' direction according to the fourth embodiment of the present invention. Compared to the second embodiment, the first planarization layer 421 in the fourth embodiment of the present invention includes the first sub-planarization layer 4211 and the second sub-planarization layer 4212, and the second sub-planarization layer 4212 is disposed between the first sub-planarization layer 4211 and the first planarization signal trace 422, that is, the second planarization signal trace 423, the first sub-planarization layer 4211, the second sub-planarization layer 4212, and the first planarization signal trace 422 are sequentially disposed on the second insulating layer 413.

By introducing the second sub-planarization layer 3212/4212, the flatness of the first flat signal trace 322/422 of the flat structure 32/42 is increased, and the first flat signal trace 322/422 is less likely to form a grating pattern to generate grating reflection.

Referring to fig. 3 and 8 to 11, fig. 8 is a partial side view of a display device in which a light leakage region is along the direction AA 'in fig. 3 according to a fifth embodiment of the present invention, fig. 9 is a partial side view of a display device in which a light leakage region is along the direction AA' in fig. 3 according to a sixth embodiment of the present invention, fig. 10 is a partial side view of a display device in which a light leakage region is along the direction AA 'in fig. 3 according to a seventh embodiment of the present invention, and fig. 11 is a partial side view of a display device in which a light leakage region is along the direction AA' in fig. 3 according to an eighth embodiment of the present invention. Based on the first to fourth embodiments, the planar structure 52/62/72/82 in the fifth to eighth embodiments of the present invention further includes a second planar layer 524/624/724/824 and a third planar signal trace 525/625/725/825 sequentially disposed on the first planar signal trace 522/622/722/822, i.e. compared to the first embodiment, the first planar layer 521, the first planar signal trace 522, the second planar layer 524, and the third planar signal trace 525 are sequentially disposed on the second insulating layer 513 in the fifth embodiment of the present invention; in the sixth embodiment, compared to the second embodiment described above, the second flat signal trace 623, the first flat layer 621, the first flat signal trace 622, the second flat layer 624, and the third flat signal trace 625 are sequentially disposed on the second insulating layer 613 according to the sixth embodiment of the present invention; in the seventh embodiment, compared to the third embodiment, the seventh embodiment of the invention sequentially arranges the first sub-planarization layer 7211, the second sub-planarization layer 7212, the first planar signal trace 722, the second planar layer 724, and the third planar signal trace 725 on the second insulating layer 713; in the eighth embodiment, compared to the fourth embodiment, the eighth embodiment of the present invention sequentially arranges the second flat signal trace 823, the first sub-flat layer 8211, the second sub-flat layer 8212, the first flat signal trace 822, the second flat layer 824, and the third flat signal trace 825 on the second insulating layer 813. The third flat signal trace 525/625/725/825 can be used to transmit a third signal, or the first flat signal trace 522/622/722/822 and the third flat signal trace 525/625/725/825 are connected by a second via (described later), so that the third flat signal trace 525/625/725/825 can assist the transmission of the first signal, and increase the conductivity of the first flat signal trace 522/622/722/822 in the process of transmitting the first signal.

By introducing the second planar layer 524/624/724/824, the flatness of the third planar signal trace 525/625/725/825 of the planar structure 52/62/72/82 is increased, and the third planar signal trace 525/625/725/825 is less likely to form a grating pattern to generate grating reflection.

Referring to fig. 3 and fig. 12 to 14, fig. 12 is a side view of the display device along the direction BB ' in fig. 3 according to the first embodiment of the present invention, fig. 13 is a side view of the display device along the direction BB ' in fig. 3 of the first via 226 having a large opening according to the second embodiment of the present invention, and fig. 14 is a side view of the display device along the direction BB ' in fig. 3 of the first via 227 having a small opening according to the second embodiment of the present invention. The display device further includes a protection window 13/23 and a display area or an active area 14/24 of the display panel, wherein the protection window 13/23 is disposed above the flat structure 12/22 for protecting the grating structure 11/22 and the flat structure 12/22, a region of the grating structure 11/22 and the flat structure 12/22 covered by the protection window 13/23 is a light-shielding region, and a region not covered by the protection window 13/23 is a light-leaking region (generally caused by process deviation); the display region 14/24 of the display panel is disposed adjacent to the grating structure 11/22 and the flat structure 12/22, and the display region 14/24 of the display panel is used for displaying light, and receives at least one of an electrical signal, a first signal, a second signal, and a third signal required for displaying light.

With reference to fig. 13 and fig. 14, in the second embodiment, when the second flat signal trace 223 is used to assist the transmission of the first signal, and the conductivity of the first flat signal trace 222 in the process of transmitting the first signal is increased, the first flat signal trace 222 may be connected to the second flat signal trace 223 through the first via 226/227, wherein the first via 226/227 may be a first via 226 having a large opening (as shown in fig. 13) or a plurality of first vias 227 having small openings (as shown in fig. 14), wherein the first via 226 having a smaller opening of the large opening has a larger aperture, and the first via 226/227 is correspondingly disposed in the first flat layer 221 on the second flat signal trace 223 in the light shielding region. In another embodiment, as shown in fig. 15, the display device actually includes a plurality of first flat signal traces 222, each of the first flat signal traces 222 can be connected to the second flat signal trace 223 through one of the first via 226 with a large opening and the first via 227 with a small opening, specifically, the first via 226 with a large opening and the first via 227 with a small opening can be used in the display device at the same time.

It is understood that for the sake of simplicity, the side view of all the embodiments in this specification is not shown here, and the side view not shown can be obtained from the top view of fig. 6 to 11, which does not affect the understanding of the inventive focus described in this specification for the present invention.

Specifically, in the fourth, sixth, and eighth embodiments, when the second flat signal trace 423/623/823 is used to assist in transferring the first signal, the first flat signal trace 422/622/822 may be connected to the second flat signal trace 423/623/823 through a first via (not shown) having a large opening or through a first via (not shown) having a small opening, and the first via is correspondingly disposed in the first flat layer 421/621/821 on the second flat signal trace 423/623/823 in the light shielding region; in the fifth to eighth embodiments, when the third flat signal trace 525/625/725/825 is used to assist in transferring the first signal, the first flat signal trace 522/622/722/822 may also be connected to the third flat signal trace 525/625/725/825 through a second via (not shown) having a large opening or a second via (not shown) having a small opening, and the second via is correspondingly disposed in the second flat layer 524/624/724/824 on the first flat signal trace 522/622/722/822 in the light shielding region, wherein the first via having a smaller aperture of the large opening has a larger aperture, and the second via having a smaller aperture of the large opening has a larger aperture.

In the present invention, when the display panels of the first to eighth embodiments are oled display panels, the oled display panels have an anode electrode and a cathode electrode which make the light emitting layer emit light when a bias voltage is applied, and in order to save the manufacturing cost of the present invention, the first flat signal trace 122/222/322/422, the second flat signal trace 223/423/623/823, or the third flat signal trace 525/625/725/825 may be simultaneously prepared when the anode electrode or the cathode electrode is formed. That is, the first flat signal trace 122/222/322/422 can have the same material as one of the anode electrode and the cathode electrode, the second flat signal trace 223/423/623/823 can have the same material as one of the anode electrode and the cathode electrode, and the third flat signal trace 525/625/725/825 can have the same material as one of the anode electrode and the cathode electrode.

Specifically, for example, in the first and third embodiments, the first flat signal trace 122/322 is prepared at the same time when the anode electrode (or cathode electrode) is formed; for example, in the second and fourth embodiments, the second flat signal trace 223/423 is prepared at the same time when the cathode electrode is formed, and the first flat signal trace 222/422 is prepared at the same time when the anode electrode is formed; for example, in the fifth to eighth embodiments, the first flat signal trace 522/622/722/822 is prepared at the same time when the cathode electrode is formed, and the third flat signal trace 525/625/725/825 is prepared at the same time when the anode electrode is formed.

It is noted that the present invention is also applicable to other types of grating structures, and is not limited to the grating structures described in this specification. To avoid redundant description, the drawings are marked with icons that are not mentioned in the present specification, and it can be known from the relative positions of the drawings, for example, 211 is marked in fig. 5, which is not mentioned in the present specification, but it can be known from fig. 4 that 211 is the first insulating layer, and so on.

In an embodiment, the present invention is applicable to a fan-out (fanout) area of a display device, so that the plurality of signal traces 112/212/312/412/512/612/712/812 can be fan-out signal traces, and when the second flat signal trace 223/423/623/823 and (or) the third flat signal trace 525/625/725/825 are used to assist the transmission of the first signal, the first flat signal trace 122/222/322/422/522/622/722/822, the second flat signal trace 223/423/623/823 and (or) the third flat signal trace 525/625/725/825 are power signal traces. Further, since the fan-out signal traces are usually disposed at equal intervals, and in addition, the market demands for narrow frames, the line width and line distance of the fan-out signal traces can be compressed to the minimum for achieving the purpose, but the fan-out signal traces are easy to form a grating arrangement. According to the invention, the flat layer is formed between the power signal routing and the fan-out signal routing, so that the power signal routing has a flat upper surface, and when light is incident to the power signal routing, grating reflection cannot be generated. Therefore, in the fan-out area of the display device, the technical problem of grating reflection can be solved through the embodiment provided by the invention, and the industrial applicability is obvious.

The invention forms the flat structure 12/22/32/42/52/62/72/82 on the grating structure 11/21/31/41/51/61/71/81, so that the first flat signal trace 122/222/322/422 or the third flat signal trace 525/625/725/825 located at the top of the flat structure 12/22/32/42/52/62/72/82 will not have a concave-convex upper surface due to the grating structure 11/21/31/41/51/61/71/81, and thus the first flat signal trace 122/222/322/422 or the third flat signal trace 525/625/725/825 with a grating arrangement will not be formed, when light is incident to the first flat signal trace 122/222/322/422 or the third flat signal trace 525/625/725/825, the light is blocked by the first flat signal trace 122/222/322/422 or the second flat signal trace 525/625/725/825 and cannot enter the grating structure 11/21/31/41/51/61/71/81, and because the first flat signal trace 122/222/322/422 or the third flat signal trace 525/625/725/825 does not form a grating arrangement pattern, the incident light cannot generate grating reflection.

Although the present invention has been described with reference to the preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, and that various changes and modifications may be effected therein by one skilled in the art without departing from the scope of the invention as defined by the appended claims.