TWI743959B - Display module - Google Patents

Abstract

A display module includes a display panel, a backlight module, and a first light shielding layer. The backlight module is on one side of the display panel and includes a bezel and a frame. The bezel has an opening. The opening has a radius R. The frame has at least one recess. A reflectivity of the bezel is greater than a reflectivity of the frame. A center of the opening and an inner edge of the frame has a shortest distance therebetween. At least a part of the recess is located within the range of the length L extending to two sides through the line passing through the center of the opening and perpendicular to the inner edge of the frame. The length L equals to H+

Description

Display module

The present invention relates to a display module.

With the development of display technology, a high screen-to-body ratio has become a trend in the development of mobile phones. The screen-to-body ratio is the ratio of the displayable area of the mobile phone screen to the overall front area of the mobile phone. In recent years, more and more monitors have made the front lens in the display area, so that the screen can be surrounded by narrow borders. However, the backlight module requires an opening to place the lens, which leads to the problem of light leakage around the opening.

The present invention provides a display module, which can effectively prevent light leakage.

R。 The display module of the present invention includes a display panel, a backlight unit and a first light shielding layer. The backlight unit is located on one side of the display panel and includes a back plate and a plastic frame. The back plate has an opening, and the opening has a radius R. The plastic frame has at least one groove. The reflectivity of the backplane is greater than the reflectivity of the plastic frame. There is the shortest distance H between the center of the hole and the inner edge of the plastic frame. The groove on one side of the inner edge meets that at least a part of the groove is located at the center of the hole and perpendicular to the inner edge of the plastic frame. In the range of the lateral extension length L, and the length L is equal to H+

R.

Based on the above, in the case where the display module of the present invention includes the display panel, the backlight unit and the first light shielding layer as configured above, the first light shielding layer is arranged on the side wall of the display panel, which can prevent the light of the backlight unit from passing through the backplane. The side wall reflects light and then enters the display panel from the side wall of the display panel, resulting in a light spot on the side wall of the back plate facing the opening, which effectively prevents light leakage.

Hereinafter, the present invention will be explained more fully with reference to the drawings of this embodiment. However, the present invention can also be embodied in various different forms and should not be limited to the embodiments described herein. The thickness of the layers and regions in the drawing will be exaggerated for clarity. The same or similar reference numbers indicate the same or similar elements, and the following paragraphs will not repeat them one by one. In addition, the directional terms mentioned in the embodiments, such as: up, down, left, right, front or back, etc., only refer to the directions of the attached drawings. Therefore, the directional terms used are used to illustrate but not to limit the present invention.

FIG. 1 is a three-dimensional exploded view of a display module 10 according to an embodiment of the invention. FIG. 2 is a schematic top view of the back of the display module 10 of FIG. 1. Figure 3 is a schematic cross-sectional view of Figure 2 along the line I-I'. Fig. 4 is an enlarged schematic view of the area R1 in Fig. 2. For the convenience of description, Fig. 4 omits some components. Please refer to FIGS. 1 to 4 together, the display module 10 includes a display panel 100, a backlight unit 200 and a first light shielding layer 300. The backlight unit 200 is located on one side of the display panel 100 and includes a back plate 202 and a plastic frame 204. The back plate 202 has an opening 203. The opening 203 can be used to place the lens 20 (see Figure 5). In this embodiment, the first light shielding layer 300 is disposed on the sidewall 100A of the display panel 100. For example, the first light shielding layer 300 is located between the sidewall 100A of the display panel 100 and the back plate 202.

R，且長度L2等於H2+

R，使得背光單元200的光線經過背板202的側壁202B反光，接著從顯示面板100的側壁100A進入顯示面板100，導致在開孔203的外壁SS上留下光點，產生漏光的問題。舉例而言，光線沿著路徑206a及路徑206b行進。在此情況下，由於在本實施例中，第一遮光層300設置於顯示面板100的側壁100A，可避免此光點的形成，有效防止漏光。於本實施例中，第一遮光層300例如是黑色單面膠或黑色油墨。 The reflectivity of the back plate 202 is greater than the reflectivity of the plastic frame 204. For example, the material of the back plate 202 includes metal, and the material of the plastic frame 204 includes polymer. The plastic frame 204 has at least one groove 205. In this embodiment, the position of the groove 205 is close to the position of the opening 203 of the back plate 202, so that the edge of the display module 10 is more beautiful. The opening 203 has a radius R. There is a shortest distance H1 and a shortest distance H2 between the center C1 of the opening 203 and the inner edge 204e of the rubber frame 204. The groove 205 on one side of the inner edge 204e satisfies at least A part of the line segment 207 passing through the center C1 of the opening 203 and perpendicular to the inner edge 204e of the rubber frame 204 extends to the length L1 on both sides, or the groove 205 at the inner edge 204e satisfies that at least a part of the groove 205 is located The line segment 209 passing through the center C1 of the opening 203 and perpendicular to the inner edge 204e of the plastic frame 204 extends to both sides within the range of the length L2, where the length L1 is equal to H1+

R, and the length L2 is equal to H2+

R makes the light of the backlight unit 200 reflect light through the sidewall 202B of the backplane 202, and then enter the display panel 100 from the sidewall 100A of the display panel 100, resulting in a light spot on the outer wall SS of the opening 203, causing light leakage. For example, light rays travel along path 206a and path 206b. In this case, since the first light shielding layer 300 is disposed on the sidewall 100A of the display panel 100 in this embodiment, the formation of this light spot can be avoided, and light leakage can be effectively prevented. In this embodiment, the first light-shielding layer 300 is, for example, black single-sided glue or black ink.

In this embodiment, the opening 203 is a blind hole. The advantage of this mode is to avoid the risk and cost of opening the display panel 100. However, the present invention is not limited to this.

The display panel 100 may include an active array substrate 102 and a color filter substrate 104, and the color filter substrate 104 is located on the active array substrate 102. In this embodiment, the display module 10 further includes a polarizer 106 and a polarizer 108. The polarizer 106 is disposed between the active array substrate 102 and the backlight unit 200, and the polarizer 106 is disposed on the top surface 104B of the color filter substrate 104. In this embodiment, the first light shielding layer 300 is, for example, disposed on the sidewall 102A of the active array substrate 102 and the sidewall 104A of the color filter substrate 104. In some embodiments, the polarizer 106 and the polarizer 108 may include a wire grid polarizer (WGP) or a polarizing film. The backlight unit 200 may include an optical stack 208 disposed on the back plate 202. The optical stack 208 includes a reflective sheet 210, a light guide plate 212 and an optical film 214a, an optical film 214b, and an optical film 214a, which are sequentially disposed on the back plate 202. The film 214c and the optical film 214d enable the backlight unit 200 to present a uniform surface light source. The optical films 214a, 214b, 214c, and 214d may be any optical films used in the backlight unit 200 well known to those with ordinary knowledge in the art. For example, the optical films 214a, 214b, 214c, and 214d may be diffusive films, reflective films, diffusion films, optical brightness enhancement films, or a combination thereof, but the invention is not limited thereto.

The display panel 100 also includes a black matrix 110. The black matrix 110 is disposed on the active array substrate 102 and is located between any two adjacent color filter patterns (not shown) of the color filter substrate 104. The display module 10 further includes a light-shielding glue 112, which is located between the polarizer 106 and the back plate 202, and is used to prevent light reflection on the outer wall SS of the opening 203 and light leakage in the plane.

The display panel 100 further includes a display medium 114 (not shown in FIG. 3). For example, please refer to FIG. 5. FIG. 5 is a schematic cross-sectional view of the display module 10 according to an embodiment of the present invention. For the convenience of description, In FIG. 5, only the backplane 202 and the light-shielding glue 112 are shown, and the remaining components of the backlight unit 200 and the black matrix 110 of the display panel 100 are omitted, and the display medium 114 is shown in this figure.

The display module 10 includes a lens 20, and the lens 20 is disposed in the opening 203. In this embodiment, the active array substrate 102 includes a first substrate 116 and a plurality of active devices 118 disposed on the first substrate 116. The display medium 114 is disposed on the first substrate 116. The color filter substrate 104 includes a second substrate 120 and an opposite electrode 122 disposed on the second substrate 120. In this embodiment, the first substrate 116 and the second substrate 120 are transparent substrates, such as glass. In other embodiments, the material of the first substrate 116 and the second substrate 120 is, for example, quartz, organic polymer, metal, or other suitable materials. In this embodiment, the display medium 114 is a liquid crystal material.

In this embodiment, the display module 10 further includes a light-shielding glue 302 and a light-shielding glue 304. The light-shielding glue 302 is located on the side wall of the polarizer 106, and the light-shielding glue 304 is located near a part of the outer wall SS of the opening 203 of the light-shielding glue 304 to prevent the outer wall SS of the opening 203 from reflecting light and in-plane light leakage.

The display area AA of the display panel 100 surrounds the opening 203. For example, the display panel 100 further includes a sealant 124, and the orthographic projection of the sealant 124 on the first substrate 116 surrounds the opening 203. In other words, the orthographic projection of the display medium 114 on the first substrate 116 and the orthographic projection of the opening 203 on the first substrate 116 are separated. For example, the orthographic projection of the display medium 114 on the first substrate 116 and the orthographic projection of the outer wall SS of the opening 203 on the first substrate 116 are separated from each other by a distance d1, because the opening 203 of the backplane 202 is surrounded by the display area AA , Can make the display module 10 have a narrow border around the periphery. In this way, the display module 10 can be suitable for applying a narrow frame design under the condition of both beautiful edges and prevention of light leakage, and the design flexibility of the display module 10 is improved.

FIG. 6 is a schematic cross-sectional view of a display module 10a according to another embodiment of the invention. At least one difference between the display module 10a of FIG. 6 and the display module 10 of FIG. 3 is that the display module 10a further includes a second light-shielding layer 400 disposed on the top surface 100B of the display panel 100. For example, the second light shielding layer 400 may be disposed on the top surface 104B of the color filter substrate 104. In this embodiment, the second light-shielding layer 400 is, for example, black single-sided glue or black ink. The second light-shielding layer 400 can prevent light from entering the display panel 100 from the top surface 100B of the display panel 100, resulting in the problem of light leakage caused by leaving light spots on the outer wall SS of the opening 203.

FIG. 7 is a schematic cross-sectional view of a display module 10b according to another embodiment of the invention. At least one difference between the display module 10b in FIG. 7 and the display module 10a in FIG. 6 is that the second light shielding layer 400 is disposed on the bottom surface 100C of the display panel 100. For example, the second light shielding layer 400 can be disposed on the bottom surface 102B of the active array substrate 102. The second light-shielding layer 400 can prevent light from entering the display panel 100 from the bottom surface 100C of the display panel 100, resulting in the problem of light leakage caused by leaving light spots on the outer wall SS of the opening 203.

FIG. 8 is a schematic cross-sectional view of a display module 10c according to another embodiment of the invention. At least one difference between the display module 10c of FIG. 8 and the display module 10a of FIG. 6 is that the second light-shielding layer 400 has a first portion 402 and a second portion 404. The first portion 402 is disposed on the top surface 100B of the display panel 100. And the second part 404 is disposed on the bottom surface 100C of the display panel 100. For example, the first part 402 can be disposed on the top surface 104B of the color filter substrate 104, and the second part 404 can be disposed on the bottom surface 102B of the active array substrate 102 to prevent light from entering the display from the top surface 100B and bottom surface 100C of the display panel 100 The panel 100 causes the problem of light leakage caused by leaving light spots on the outer wall SS of the opening 203.

FIG. 9 is a schematic cross-sectional view of a display module 10d according to another embodiment of the invention. Fig. 10 is a partial perspective view of Fig. 9; Please refer to FIGS. 9 and 10 together. At least one difference between the display module 10 d of FIGS. 9 and 10 and the display module 10 of FIG. 3 is that the display module 10 d further includes a third light-shielding layer 500. For the convenience of description, only the third light shielding layer 500, the back plate 202 and the plastic frame 204 are shown in FIG. 10. The third light shielding layer 500 is located on the side wall 202B of the back plate 202, and the position of the side wall 202B corresponds to the position of the groove 205 of the plastic frame 204. In other words, the side wall 202B of the back plate 202 and the groove 205 of the plastic frame 204 are located on the same side of the opening 203. In this embodiment, the third light-shielding layer 500 is, for example, black single-sided glue or black ink. The third light-shielding layer 500 can prevent light from being reflected by the sidewall 202B of the back plate 202 and entering the display panel 100 to cause light spots on the outer wall SS of the opening 203, thereby solving the problem of light leakage.

FIG. 11 is a schematic cross-sectional view of a display module 10e according to another embodiment of the invention. At least one difference between the display module 10e in FIG. 11 and the display module 10 in FIG. 3 is that the display module 10e further includes a fourth light shielding layer 600 that is disposed on the outer wall SS of the opening 203. When the light of the backlight unit 200 is reflected by the outer wall SS of the opening 203 and enters the display panel 100 from the side wall 100A of the display panel 100, the fourth light shielding layer 600 can prevent the light from leaving a light spot on the outer wall SS of the opening 203. Effectively prevent light leakage. For example, the outer wall SS of the opening 203 may be entirely covered by the fourth light shielding layer 600.

R。由於第一遮光層設置於顯示面板的側壁，可避免背光單元的光線經過背板的側壁反光，接著從顯示面板的側壁進入顯示面板，導致在背板面對開孔的側壁上留下光點，有效防止漏光。 In summary, the opening of the display module of the present invention has a radius R, and the reflectivity of the back plate is greater than that of the plastic frame. There is the shortest distance H between the center of the hole and the inner edge of the plastic frame, and at least a part of the groove is located within the range of the length L extending from the center of the hole and perpendicular to the inner edge of the plastic frame to both sides, and the length L is equal to H+

R. Since the first light-shielding layer is disposed on the side wall of the display panel, it can prevent the light of the backlight unit from reflecting through the side wall of the back plate, and then enter the display panel from the side wall of the display panel, leaving light spots on the side wall of the back plate facing the opening , Effectively prevent light leakage.

10, 10a, 10b, 10c, 10d: display module 10e: display module 20: lens 100: display panel 100A: side wall 100B: Top surface 100C: bottom surface 102: active array substrate 102A: side wall 102B: bottom surface 104: Color filter substrate 104A: side wall 104B: Top surface 106: Polarizer 108: Polarizer 110: black matrix 112: Shading glue 114: display medium 116: first substrate 118: active components 120: second substrate 122: Counter electrode 124: Frame glue 200: Backlight unit 202: Backplane 202B: side wall 203: Hole 204: plastic frame 205: Groove 206a, 206b: path 207: Line Segment 208: Optical stacking 209: Line Segment 210: reflective sheet 212: light guide plate 214a, 214b, 214c, 214d: optical film 300: the first shading layer 302, 304: shading glue 400: second shading layer 402: Part One 404: Part Two 500: third shading layer 600: fourth shading layer C1: Center of circle d1: spacing H1, H2: shortest distance I-I’: Sectional line L1: length L2: length R: radius R1: area SS: Outer wall

Read the following detailed description and match the corresponding diagrams to understand many aspects of this disclosure. It should be noted that many of the features in the drawing are not drawn in actual proportions according to the standard practice in the industry. In fact, the size of the feature can be increased or decreased arbitrarily to facilitate the clarity of the discussion. FIG. 1 is a three-dimensional exploded view of a display module according to an embodiment of the invention. FIG. 2 is a schematic top view of the display module of FIG. 1. FIG. Figure 3 is a schematic cross-sectional view of Figure 2 along the line I-I'. Fig. 4 is an enlarged schematic diagram of area R1 in Fig. 2. FIG. 5 is a schematic cross-sectional view of a display module according to an embodiment of the invention. FIG. 6 is a schematic cross-sectional view of a display module according to another embodiment of the invention. FIG. 7 is a schematic cross-sectional view of a display module according to another embodiment of the invention. FIG. 8 is a schematic cross-sectional view of a display module according to another embodiment of the present invention. FIG. 9 is a schematic cross-sectional view of a display module according to another embodiment of the invention. Fig. 10 is a partial perspective view of Fig. 9; FIG. 11 is a schematic cross-sectional view of a display module according to another embodiment of the invention.

Domestic deposit information (please note in the order of deposit institution, date and number) without Foreign hosting information (please note in the order of hosting country, institution, date, and number) without

10: Display module

100: display panel

100A: side wall

102: active array substrate

102A: side wall

104: Color filter substrate

104A: side wall

106: Polarizer

108: Polarizer

110: black matrix

112: Shading glue

200: Backlight unit

202: Backplane

202B: side wall

203: Hole

204: plastic frame

206a, 206b: path

208: Optical stacking

210: reflective sheet

212: light guide plate

214a, 214b, 214c, 214d: optical film

300: the first shading layer

I-I’: Sectional line

SS: Outer wall

Claims (10)

A display module includes: a display panel; a backlight unit located on one side of the display panel, and includes: a back plate having an opening, wherein the opening has a radius R; and a plastic frame having at least one Groove, wherein the reflectivity of the back plate is greater than the reflectivity of the plastic frame, the shortest distance H between the center of the hole and an inner edge of the plastic frame, and at least a part of the groove is located at the center of the circle passing through the hole And a line segment perpendicular to the inner edge of the plastic frame extends to both sides within the range of a length L, and the length L is equal to H+

R; and a first light-shielding layer disposed on a side wall of the display panel. The display module according to claim 1, further comprising a second light-shielding layer, and the second light-shielding layer is disposed on the top surface or the bottom surface of the display panel. The display module according to claim 1, further comprising a second light-shielding layer, the second light-shielding layer has a first part and a second part, the first part is disposed on the top surface of the display panel, and the second light-shielding layer Part of it is arranged on the bottom surface of the display panel. The display module according to claim 1, further comprising a third light-shielding layer, and the third light-shielding layer is located on the back plate at a position corresponding to the groove of the plastic frame. The display module according to claim 1, wherein the display panel includes a first substrate and a display medium disposed on the first substrate, the orthographic projection of the display medium on the first substrate and the opening in the The orthographic projection of the first substrate is separated. The display module according to claim 1, further comprising a fourth light-shielding layer, and the fourth light-shielding layer is disposed on the outer wall of the opening. The display module according to claim 6, wherein the outer wall of the opening is entirely covered by the fourth light-shielding layer. The display module according to claim 1, wherein the side wall of the display panel is entirely covered by the first light-shielding layer. The display module according to claim 1, wherein the material of the back plate includes metal. The display module according to claim 1, wherein the first light-shielding layer is located between the sidewall of the display panel and the back plate.

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