TWI843693B - Display panel - Google Patents

Abstract

A display panel includes a first substrate, a second substrate, a light-emitting element and a first light-shielding layer. The light-emitting element is disposed on a peripheral area of ​​the second substrate and is located between the first substrate and the second substrate. A first surface and a second surface of the light-emitting element face the first substrate and the second substrate respectively. A sidewall of the light-emitting element connects the first surface and the second surface. The first light-shielding layer is disposed on the peripheral area of ​​the second substrate and has a first opening. The light-emitting element is disposed in the first opening of the first light-shielding layer. The first light-shielding layer covers the first surface and the sidewall of the light-emitting element, and the second surface of the light-emitting element is the light-emitting surface of the light-emitting element. In addition, another display panel is also provided.

Description

Display Panel

The present invention relates to a display panel.

In order to meet the needs of users to display various shared information and comprehensive information on a large area, spliced display devices with multiple display panels have been widely used in various fields. For example, spliced display devices are commonly seen in the field of public information display (such as large advertisements, monitoring and management screens, etc.). However, spliced display devices usually have the problem of discontinuous overall display screen, which affects the viewing quality.

The present invention provides a display panel with good optical performance.

The display panel of an embodiment of the present invention includes a first substrate, a second substrate, a light-emitting element and a first shading layer. The second substrate is arranged opposite to the first substrate and has an active area and a peripheral area outside the active area. The light-emitting element is arranged on the peripheral area of the second substrate and is located between the first substrate and the second substrate. The light-emitting element has a first surface, a second surface and a side wall, the first surface and the second surface face the first substrate and the second substrate respectively, and the side wall connects the first surface and the second surface. The first shading layer is arranged on the peripheral area of the second substrate and has a first opening. The light-emitting element is arranged in the first opening of the first shading layer. The first shading layer covers the first surface and the side wall of the light-emitting element, and the second surface of the light-emitting element is the light-emitting surface of the light-emitting element.

The display panel of another embodiment of the present invention includes a first substrate, a second substrate, a gate drive circuit, a first light shielding layer and a light-emitting element. The first substrate has an active area and a peripheral area outside the active area. The second substrate is arranged opposite to the first substrate and has an active area and a peripheral area outside the active area. The active area and the peripheral area of the first substrate overlap the active area and the peripheral area of the second substrate respectively. The gate drive circuit is arranged on the peripheral area of the first substrate. The first light shielding layer is arranged on the peripheral area of the first substrate, located between the first substrate and the second substrate, and covers the gate drive circuit. The light-emitting element is arranged on the peripheral area of the first substrate, located between the first substrate and the second substrate, and located outside the first light shielding layer.

Reference will now be made in detail to exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Whenever possible, the same reference numerals are used in the drawings and description to represent the same or similar parts.

It should 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 may be directly on or connected to another element, or an intermediate element may also exist. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intermediate elements. As used herein, "connected" may refer to physical and/or electrical connections. Furthermore, "electrically connected" or "coupled" may mean that there are other elements between two elements.

As used herein, "about," "approximately," or "substantially" includes the stated value and the average value within an acceptable deviation range of a particular value determined by a person of ordinary skill in the art, taking into account the measurement in question and the particular amount of error associated with the measurement (i.e., the limitations of the measurement system). For example, "about" can mean within one or more standard deviations of the stated value, or within ±30%, ±20%, ±10%, ±5%. Furthermore, as used herein, "about," "approximately," or "substantially" can select a more acceptable deviation range or standard deviation depending on the optical property, etching property, or other property, and can apply to all properties without using one standard deviation.

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

Fig. 1 is a cross-sectional schematic diagram of a display panel according to an embodiment of the present invention. Fig. 2 is a cross-sectional and enlarged schematic diagram of a peripheral area of a display panel according to an embodiment of the present invention. Fig. 1 omits the wire 220 of Fig. 2 , and Fig. 2 omits the frame glue 400 and the display medium 500 of Fig. 1 .

1 and 2 , the display panel 10 includes a first substrate 110 having an active area 110 a and a peripheral area 110 b outside the active area 110 a . For example, in one embodiment, the first substrate 110 may be a pixel array substrate, wherein the pixel array substrate includes a first substrate (not shown), a plurality of pixel structures (not shown) disposed on the first substrate (not shown), a plurality of data lines, and a plurality of gate lines. The plurality of pixel structures are disposed in the active region 110a, and each pixel structure may include a pixel transistor (not shown) and a pixel electrode (not shown). The plurality of first ends of the plurality of pixel transistors of the plurality of pixel structures are electrically connected to the plurality of data lines, the plurality of control ends of the plurality of pixel transistors of the plurality of pixel structures are electrically connected to the plurality of gate lines, and the plurality of second ends of the plurality of pixel transistors of the plurality of pixel structures are electrically connected to the plurality of pixel electrodes of the plurality of pixel structures.

In one embodiment, the display panel 10 further includes a gate drive circuit 120 disposed in the peripheral area 110b of the first substrate 110. In one embodiment, the gate drive circuit 120 is electrically connected to the plurality of gate lines. In one embodiment, the gate drive circuit 120 may include a component (such as but not limited to: a thin film transistor) whose electrical properties are easily affected by light.

The display panel 10 further includes a second substrate 210 disposed opposite to the first substrate 110. The second substrate 210 has an active area 210a and a peripheral area 210b outside the active area 210a, which overlap the active area 110a and the peripheral area 110b of the first substrate 110, respectively. For example, in one embodiment, the second substrate 210 may be a color filter substrate, wherein the color filter substrate may include a black matrix (BM) (not shown) and a plurality of color filter patterns (not shown) disposed on the active area 210a, the black matrix having a plurality of pixel openings respectively overlapping a plurality of pixel electrodes, and the plurality of color filter patterns are respectively disposed in the plurality of pixel openings of the black matrix.

The display panel 10 further includes a light-emitting element 300 disposed on the peripheral area 210b of the second substrate 210 and located between the first substrate 110 and the second substrate 210. The light-emitting element 300 has a first surface 310, a second surface 320 and a side wall 330, the first surface 310 and the second surface 320 face the first substrate 110 and the second substrate 210 respectively, and the side wall 330 connects the first surface 310 and the second surface 320. In one embodiment, the display panel 10 further includes a wire 220 disposed on the peripheral area 210b of the second substrate 210, and the light-emitting element 300 is disposed on the wire 220 and electrically connected to the wire 220. In one embodiment, the light-emitting element 300 is, for example, a micro light-emitting diode (μLED), and the wire 220 is, for example, a metal wire, but the present invention is not limited thereto.

The display panel 10 further includes a first light shielding layer 230 disposed on the peripheral area 210b of the second substrate 210. The first light shielding layer 230 covers the first surface 310 and the sidewall 330 of the light emitting element 300. In the top view of the display panel 10, the first light shielding layer 230 has a first opening 232, and the light emitting element 300 is disposed in the first opening 232 of the first light shielding layer 230. In one embodiment, the first light shielding layer 230 and the light emitting element 300 overlap the gate driving circuit 120, and the first light shielding layer 230 is located between the light emitting element 300 and the gate driving circuit 120.

The second surface 320 of the light-emitting element 300 is the light-emitting surface of the light-emitting element 300. In other words, the light beam L1 emitted by the light-emitting element 300 is emitted from the second surface 320 of the light-emitting element 300, passes through the second substrate 210 and is transmitted to the external environment. Blocked by the first light-shielding layer 230, the light beam L1 emitted by the light-emitting element 300 is not easy to irradiate the gate driving circuit 120. Thus, when a plurality of display panels 10 are spliced together to form a spliced display device (not shown) having a large display screen, the light beam L1 emitted by the light emitting element 300 on the peripheral area 210b of each display panel 10 can be emitted from the first opening 232 of the first light shielding layer 230 to eliminate the splicing seam of the large display screen, and the light beam L1 emitted by the light emitting element 300 is not likely to affect the electrical properties of the gate drive circuit 120. The spliced display device formed by splicing a plurality of display panels 10 can have both excellent optical and electrical performance.

In one embodiment, the display panel 10 further includes a frame glue 400 and a display medium 500, the frame glue 400 is disposed between the peripheral area 110b of the first substrate 110 and the peripheral area 210b of the second substrate 210 and encloses a receiving space R with the first substrate 110 and the second substrate 210, and the display medium 500 is disposed in the receiving space R. In one embodiment, the display medium 500 is, for example, liquid crystal, but the present invention is not limited thereto. In one embodiment, the frame glue 400 is disposed on the peripheral area 210b of the second substrate 210, the first light shielding layer 230 is located between the light emitting element 300 and the frame glue 400, and the frame glue 400 is located between the first light shielding layer 230 and the first substrate 110.

In one embodiment, the display panel 10 further includes a second light shielding layer 240, which is disposed on the peripheral area 210b of the second substrate 210 and has a second opening 242. The light-emitting element 300 is disposed in the second opening 242. The second light shielding layer 240 has a side wall 240s defining the second opening 242, and the first light shielding layer 230 shields the gap g between the side wall 240s of the second light shielding layer 240 and the light-emitting element 300. Since the first light shielding layer 230 shields the gap g, the external ambient light L2 is not easy to pass through the gap g and irradiate the gate driving circuit 120. Thereby, the electrical properties of the gate driving circuit 120 are not easily affected by the external ambient light L2.

In one embodiment, the second light shielding layer 240 and the black matrix of the second substrate 210 may belong to the same film layer, and the first light shielding layer 230 may belong to another film layer formed on the second light shielding layer 240 and the light emitting element 300, but the present invention is not limited thereto.

It should be noted that the following embodiments use the same component numbers and some contents of the previous embodiments, wherein the same number is used to represent the same or similar components, and the description of the same technical contents is omitted. The description of the omitted parts can be referred to the previous embodiments, and the following embodiments will not be repeated.

Fig. 3 is a cross-sectional schematic diagram of a display panel of another embodiment of the present invention. Fig. 4 is a cross-sectional and enlarged schematic diagram of a peripheral area of a display panel of another embodiment of the present invention. Fig. 3 omits the wire 220 of Fig. 4 , and Fig. 4 omits the frame glue 400 and the display medium 500 of Fig. 3 .

The display panel 10A of FIGS. 3 and 4 is similar to the display panel 10 of FIGS. 1 and 2 , except that in the embodiment of FIGS. 3 and 4 , the first light shielding layer 230A is formed at one time to cover the light emitting element 300 and the second substrate 210 after the light emitting element 300 is bonded to the wire 220 on the second substrate 210 . Compared to the display panel 10 of FIGS. 1 and 2 which uses the first light shielding layer 230 and the second light shielding layer 240 formed in stages to cover the light emitting element 300 and the second substrate 210, the display panel 10A of FIGS. 3 and 4 uses the first light shielding layer 230A formed once to cover the light emitting element 300 and the second substrate 210, which can avoid the topographical bulge generated at the junction of the two light shielding layers (i.e., the first light shielding layer 230 and the second light shielding layer 240), thereby increasing the process margin.

Fig. 5 is a cross-sectional schematic diagram of a display panel according to another embodiment of the present invention. Fig. 6 is a cross-sectional and enlarged schematic diagram of a peripheral area of a display panel according to another embodiment of the present invention. Fig. 5 omits the wire 220B of Fig. 6 , and Fig. 6 omits the frame glue 400 and the display medium 500 of Fig. 5 .

The display panel 10B of FIG. 5 and FIG. 6 is similar to the display panel 10 of FIG. 1 and FIG. 2 . The main difference between the two is that the light emitting element 300 and the first light shielding layer 230 , 230B are disposed at different positions.

Please refer to Figures 5 and 6. Specifically, in this embodiment, the first light shielding layer 230B is disposed on the peripheral area 110b of the first substrate 110, located between the first substrate 110 and the second substrate 210, and covers the gate driving circuit 120; the light-emitting element 300 is disposed on the peripheral area 110b of the first substrate 110, located between the first substrate 110 and the second substrate 210, and located outside the first light shielding layer 230B.

In this embodiment, the gate driving circuit 120 includes a first portion 120-1 and a second portion 120-2, the first light shielding layer 230B includes a first portion 230B-1 and a second portion 230B-2, the first portion 230B-1 and the second portion 230B-2 of the first light shielding layer 230B respectively cover the first portion 120-1 and the second portion 120-2 of the gate driving circuit 120, and the light-emitting element 300 is disposed in a gap G between the first portion 230B-1 of the first light shielding layer 230B and the second portion 230B-2 of the first light shielding layer 230B.

In the present embodiment, the second light shielding layer 240B is disposed in the peripheral region 210b of the second substrate 210 and is located between the first substrate 110 and the second substrate 210. The second light shielding layer 240B has a plurality of openings 244, and at least one of the plurality of openings 244 overlaps the light emitting element 300. In the present embodiment, at least one of the plurality of openings 244 of the second light shielding layer 240B overlaps the first light shielding layer 230B that encapsulates the gate driving circuit 120. In the present embodiment, the second light shielding layer 240B may be in a grid shape, and the plurality of openings 244 of the second light shielding layer 240B may be a plurality of slits, but the present invention is not limited thereto.

In this embodiment, the light-emitting element 300 is disposed on the first substrate 110, and the opening 244 of the second light-shielding layer 240B on the second substrate 210 allows the light beam L1 emitted by the light-emitting element 300 to pass through without excessively affecting the display. The external ambient light L2 can pass through the opening 244 of the second light-shielding layer 240B and be transmitted to the gate driving circuit 120 disposed on the first substrate 110. The first light-shielding layer 230B covering the gate driving circuit 120 can prevent the external ambient light L2 from irradiating the gate driving circuit 120. In short, under this structure, the light beam L1 emitted by the light emitting element 300 can be transmitted smoothly, and at the same time, the gate driving circuit 120 element will not be over-irradiated by the external ambient light L2 and affect its electrical properties.

Fig. 7 is a cross-sectional schematic diagram of a display panel according to another embodiment of the present invention. Fig. 8 is a cross-sectional and enlarged schematic diagram of a peripheral area of a display panel according to another embodiment of the present invention. Fig. 7 omits the wire 220B of Fig. 8 , and Fig. 8 omits the frame glue 400 and the display medium 500 of Fig. 7 .

The display panel 10C of FIGS. 7 and 8 is similar to the display panel 10B of FIGS. 5 and 6 , but the difference between the two is that the display panel 10C of FIGS. 7 and 8 may not include the second light shielding layer 240B of the display panel 10B of FIGS. 5 and 6 .

10, 10A, 10B, 10C: display panel 110: first substrate 110a, 210a: active area 110b, 210b: peripheral area 120: gate drive circuit 120-1, 230B-1: first part 120-2, 230B-2: second part 210: second substrate 220, 220B: wire 230, 230A, 230B: first light shielding layer 232: first opening 240, 240B: second light shielding layer 240s, 330: side wall 242: second opening 244: opening 300: light-emitting element 310: first surface 320: second surface 400: frame glue 500: Display medium G, g: Gap L1: Light beam L2: External ambient light R: Accommodation space

FIG. 1 is a schematic cross-sectional view of a display panel of an embodiment of the present invention. FIG. 2 is a schematic cross-sectional and enlarged schematic view of a peripheral area of a display panel of an embodiment of the present invention. FIG. 3 is a schematic cross-sectional view of a display panel of another embodiment of the present invention. FIG. 4 is a schematic cross-sectional and enlarged schematic view of a peripheral area of a display panel of another embodiment of the present invention. FIG. 5 is a schematic cross-sectional view of a display panel of another embodiment of the present invention. FIG. 6 is a schematic cross-sectional and enlarged schematic view of a peripheral area of a display panel of another embodiment of the present invention. FIG. 7 is a schematic cross-sectional view of a display panel of another embodiment of the present invention. FIG. 8 is a schematic cross-sectional and enlarged schematic view of a peripheral area of a display panel of another embodiment of the present invention.

10: Display panel

110: First substrate

110a, 210a: Active area

110b, 210b: peripheral areas

120: Gate drive circuit

210: Second substrate

230: First light shielding layer

240: Second light shielding layer

300: Light-emitting element

400: Frame glue

500: Display media

R: Storage space

Claims (8)

A display panel includes: a first substrate; a second substrate disposed opposite to the first substrate and having an active area and a peripheral area outside the active area; a light-emitting element disposed on the peripheral area of the second substrate and located between the first substrate and the second substrate, wherein the light-emitting element has a first surface, a second surface and a side wall, the first surface and the second surface face the first substrate and the second substrate respectively, and the side wall connects the first surface and the second surface; and a first light-shielding layer disposed on the peripheral area of the second substrate and having a first opening, wherein the light-emitting element is disposed at the first opening of the first light-shielding layer, the first light-shielding layer covers the first surface and the side wall of the light-emitting element, and the second surface of the light-emitting element is a light-emitting surface of the light-emitting element. The display panel as described in claim 1 further comprises: A gate drive circuit, wherein the first substrate has an active region and a peripheral region outside the active region, the active region and the peripheral region of the first substrate overlap the active region and the peripheral region of the second substrate respectively, the gate drive circuit is arranged in the peripheral region of the first substrate, the first light shielding layer and the light emitting element overlap the gate drive circuit, and the first light shielding layer is located between the light emitting element and the gate drive circuit. The display panel as described in claim 1 further comprises: A frame glue disposed on the peripheral area of the second substrate, wherein the first light shielding layer is located between the light emitting element and the frame glue, and the frame glue is located between the first light shielding layer and the first substrate. The display panel as described in claim 1 further comprises: A second light shielding layer, disposed on the peripheral area of the second substrate and having a second opening, wherein the light emitting element is disposed in the second opening, the second light shielding layer has a side wall defining the second opening, and the first light shielding layer shields a gap between the side wall of the second light shielding layer and the light emitting element. A display panel includes: a first substrate having an active area and a peripheral area outside the active area; a second substrate disposed opposite to the first substrate and having an active area and a peripheral area outside the active area, wherein the active area and the peripheral area of the first substrate overlap the active area and the peripheral area of the second substrate respectively; a gate drive circuit disposed on the peripheral area of the first substrate; a first light shielding layer disposed on the peripheral area of the first substrate, located between the first substrate and the second substrate, and covering the gate drive circuit; and a light-emitting element disposed on the peripheral area of the first substrate, located between the first substrate and the second substrate, and located outside the first light shielding layer. A display panel as described in claim 5, wherein the gate drive circuit includes a first part and a second part, the first light-shielding layer includes a first part and a second part, the first part and the second part of the first light-shielding layer respectively cover the first part and the second part of the gate drive circuit, and the light-emitting element is arranged in a gap between the first part of the first light-shielding layer and the second part of the first light-shielding layer. The display panel as described in claim 5 further comprises: A second light shielding layer disposed in the peripheral area of the second substrate and located between the first substrate and the second substrate, wherein the second light shielding layer has at least one opening overlapping the light emitting element. In the display panel as described in claim 7, the at least one opening of the second light-shielding layer further overlaps the first light-shielding layer.

Images