TW201628846A - Display module - Google Patents

Abstract

A display module including a display panel, an optical film, a cover plate and an optical clear adhesive (OCA) layer is provided. The display panel has a display surface. The optical film is disposed on the display surface, wherein the optical film has a first surface back to the display panel, and the first surface has a plurality of edges and a plurality of corners formed by each adjacent two of the edges crossed with each other. The cover plate is disposed on the first surface of the optical film and covers the first surface. The OCA layer is disposed between the cover plate and the optical film and connected with the cover plate and the OCA layer, wherein the OCA layer covers the edges of the first surface and exposes the corners and part of regions adjacent to the corners.

Description

Display module

The present invention relates to a display module, and more particularly to a display module using an optical adhesive layer.

In recent years, with the advancement of technology and the development of the electronics industry, the use of electronic devices such as notebooks (notebooks, NBs), smart phones and tablets has become more and more common. Convenient, versatile and aesthetically pleasing design direction to provide users with more choices. As users' demand for electronic products is increasing, display modules that play an important role in electronic products have also become the focus of designers.

The display module can output information in the electronic device in the form of an image. The display module usually includes a display panel, a cover plate, an assembly frame, and the like, and an optical film or a touch unit can be disposed according to requirements. In addition, when the display panel is a non-self-luminous display panel, the display module may also be configured with a backlight module to provide light to the display panel and pass through electronic components (such as active components or pixel arrays) inside the display panel. Thereby the display module displays the image. The above components may be assembled by bonding optical clear adhesive (OCA) layers to each other. For example, cover The plate can be bonded to the optical film and the display panel by optical glue. However, when the display module performs a Drop test after the assembly is completed, the stress concentrated at the corner of the optical film easily peels off the optical film from the optical adhesive layer, causing damage to the display module. In turn, the reliability of the display module is affected.

The invention provides a display module with better reliability.

The display module of the present invention comprises a display panel, an optical film, a cover plate and an optical adhesive layer. The display panel has a display surface. The optical film is disposed on the display surface, wherein the optical film has a first surface facing away from the display panel, and the first surface has a plurality of edges and a plurality of corners formed by the intersection of any two adjacent edges of the edge. The cover plate is disposed on the first surface of the optical film and covers the first surface. The optical adhesive layer is disposed between the cover plate and the optical film, and connects the cover plate and the optical film, wherein the optical adhesive layer covers the edge of the first surface, and exposes a corner portion and a partial region adjacent to the corner.

Based on the above, in the display module of the present invention, the first surface of the optical film facing away from the display panel has a plurality of edges and a plurality of corners formed by the intersection of any two adjacent edges of the edge, and is used for connecting the cover plate. An optical adhesive layer with the optical film covers the edge of the first surface and exposes a portion of the corner and the adjacent corner. In this way, the optical adhesive layer is not bonded to the corner of the optical film, and the optical film and the optical adhesive layer can be prevented from being peeled off due to stress generated at the corner when the display module is mechanically tested. Accordingly, the display module of the present invention has better reliability.

The above described features and advantages of the invention will be apparent from the following description.

100‧‧‧ display module

110‧‧‧ display panel

112‧‧‧ display surface

120‧‧‧Optical diaphragm

122‧‧‧ first surface

Edge of 122a‧‧

122b‧‧‧ corner

130‧‧‧ Cover

132‧‧‧Light transmission area

134‧‧ ‧ shaded area

140‧‧‧Optical adhesive layer

142, 142a, 142b‧‧‧ turning

D‧‧‧distance

1 is a top plan view of a display panel in accordance with an embodiment of the present invention.

Figure 2 is a cross-sectional view of the display panel of Figure 1 taken along line I-I'.

3 and 4 are partial schematic views of a display panel according to another embodiment of the present invention.

1 is a top plan view of a display panel in accordance with an embodiment of the present invention. Figure 2 is a cross-sectional view of the display panel of Figure 1 taken along line I-I'. Referring to FIG. 1 and FIG. 2 , in the embodiment, the display module 100 includes a display panel 110 (shown in FIG. 2 ), an optical film 120 , a cover plate 130 , and an optical adhesive layer 140 . The display panel 110 of the present embodiment, and FIGS. 1 and 2 omits other components (such as an assembly frame) suitable for the display panel, so that the optical film 120, the cover plate 130, and the optical adhesive layer are more clearly shown in the drawings. The relative relationship of 140. In this embodiment, the display panel 110 is, for example, a liquid crystal display panel (LCD), an organic light emitting diode (OLED) display panel, or other suitable display panel, and includes a thin film transistor. (thin film transistor, TFT) array substrate, color filter (CF) substrate or other components suitable for display panels, but the invention does not limit its kind and composition. By this, display Panel 110 has a display surface 112 that is adapted to display an image.

Furthermore, in the present embodiment, the optical film 120 is disposed on the display surface 112. The optical film 120 is, for example, a polarizer, but may be other suitable optical films in other embodiments, and the invention is not limited in its kind. The optical film 120 has a first surface 122 facing away from the display panel 110, and the cover plate 130 is disposed on the first surface 122 of the optical film 120 and covers the first surface 122. The optical adhesive layer 140 is disposed between the cover plate 130 and the optical film 120 and connects the cover plate 130 and the optical film 120. The cover plate 130 is, for example, a glass cover plate, a plastic substrate, a sapphire substrate or other suitable cover plate, which is generally disposed on the outermost layer of the display module 100 for protection. However, the present invention does not limit the type of the cover plate 130 and whether it is disposed outside. Other components. The optical adhesive layer 140 is used to bond the cover plate 130 to the optical film 120, and preferably extends to the outside of the optical film 120 to bond the cover plate 130 and the display panel 110, as shown in FIG. In addition, the display module 100 can also be configured with an unillustrated touch unit between the cover 130 and the display panel 110 according to requirements. The touch unit can be formed between the cover 130 and the optical adhesive layer 140 according to the type thereof. The optical adhesive layer 140 and the display panel 110 may be formed between the cover plate 130 and the display panel 110 with an additional adhesive layer. The present invention does not limit the position and configuration of the touch unit. Whether or not.

In the present embodiment, the optical adhesive layer 140 can be used not only to connect the cover plate 130 and the optical film 120, but also has a special shape design, which can be used to improve the reliability of the display module 100.

Specifically, in this embodiment, for example, the optical of the embodiment The first surface 122 of the diaphragm 120 presents a rectangular shape having four edges 122a and four corners 122b formed by the intersection of any two adjacent edges of the edge 122a, and the corner 122b of the first surface 122 includes a plurality of right angles However, the shape of the optical film 120 can be adjusted according to requirements, and the invention is not limited. During the assembly process of the display module 100, the optical adhesive layer 140 covers the first surface 122 and extends to the side of the optical film 120 to connect the cover plate 130 and the display panel 110, as shown in FIG. As such, the optical adhesive layer 140 also covers the edge 122a of the first surface 122 of the optical film 120. However, the optical adhesive layer 140 of the present embodiment exposes a partial region of the corner 122b and the adjacent corner 122b, that is, the optical adhesive layer 140 does not cover a portion of the corner 122b and the adjacent corner 122b, as shown in FIG.

Further, in the embodiment, the optical adhesive layer 140 has a plurality of turning portions 142, and the turning portion 142 correspondingly exposes the corner 122b. For example, the optical adhesive layer 140 of the present embodiment has a substantially rectangular shape and has four turning portions 142 corresponding to the four corners 122b of the first surface 122, respectively. Wherein, the edge of the vertical projection of the turning portion 142 of the embodiment on the cover plate 130 presents a straight line. In other words, the turning portion 142 of the present embodiment can be regarded as being obtained by cutting a right angle corresponding to the corner 122b from the optical adhesive layer 140 which is substantially rectangular, thereby exposing the corner 122b. Thereby, when the display module 100 after the completion of the assembly is subjected to mechanical testing, such as a drop test or a roller test, and the stress is accumulated at the corner 122b, since the optical adhesive layer 140 is not covered at the corner 122b, the optical film is 120 and the optical adhesive layer 140 are not peeled off by the stress at the corner 122b. Accordingly, the yield of the display module 100 through the mechanical test is improved, so that the display module 100 has better reliability.

However, the present invention does not limit the shape of the turning portion 142. For example, please refer to FIG. 3, which is a partial schematic view of a display panel according to another embodiment of the present invention. In this embodiment, the vertically projecting edge of the turning portion 142a on the cover plate 130 assumes an arc shape such that it exposes a corner 122b of the first surface 122 and a partial region of the adjacent corner 122b. Similarly, please refer to FIG. 4, which is a partial schematic view of a display panel according to another embodiment of the present invention. In this embodiment, the vertically projecting edge of the turning portion 142b on the cover plate 130 presents a right angle that is recessed into the optical adhesive layer 140 such that it exposes a portion of the corner 122b and the adjacent corner 122b. It can be seen that the present invention does not limit the shape of the turning portions 142, 142a and 142b, which can be designed according to requirements to correspondingly expose the corners 122b.

On the other hand, in the embodiment, the optical adhesive layer 140 may have other designs to improve the reliability of the display module 100.

Specifically, in the present embodiment, the cover plate 130 has a light transmitting region 132 and a shielding region 134 located outside the light transmitting region 132. Preferably, the shielding area 134 of the embodiment may surround the outer side of the light transmitting area 132, but the invention is not limited thereto. 1 , 3 and 4 are indicated by oblique lines to represent the area of the shielding area 134 so that it can be clearly separated from the light transmitting area 132 in FIGS. 1 , 3 and 4 , and the method can be in the cover plate. The periphery of the 130 is formed by a colored ink layer (not shown) or other masking material having a high light-shielding property, but the present invention does not limit the formation of the masking region 134. The light-transmissive area 132 corresponds to the display surface 112 , and the image generated by the display panel 110 can be transmitted from the display surface 112 to the outside of the display module 100 through the optical film 120 , the optical adhesive layer 140 , and the transparent region 132 of the cover 130 . In contrast, the shielding area 134 can be used to shield the interior of the display module 100. Peripheral lines or peripheral components not shown. During the assembly process of the display module 100, the optical adhesive layer 140 is disposed in the light transmitting region 132 and extends to the shielding region 134. In other words, the vertical projection of the optical adhesive layer 140 relative to the cover plate 130 corresponds to the light transmissive region 132 and extends to the shadow region 134. Preferably, the distance d from which the optical adhesive layer 140 extends to the shielding region 134 may be 0.6 millimeters (mm) or more, but the invention is not limited thereto.

Therefore, when the display module 100 performs a pressure autoclave process during its assembly process, since the optical adhesive layer 140 extends from the light transmitting region 132 of the cover plate 130 to the shielding region 134, excessive pressure can be avoided. The generated bubbles move into the optical adhesive layer 140 adjacent to the light transmitting region 132. In other words, even if the display module 100 generates air bubbles between the optical adhesive layer 140 and the cover plate 130 due to excessive pressure in the pressurized defoaming process, bubbles may only exist in the periphery of the optical adhesive layer 140 to correspond to the shielding area 134. That is, the area where bubbles may be generated around the optical adhesive layer 140 of the present embodiment has been covered by the shielding area 134. Accordingly, the display module 100 of the present embodiment does not affect the visual effect due to bubbles generated during the assembly process, so that the display module 100 has better reliability.

In summary, in the display module of the present invention, the first surface of the optical film facing away from the display panel has a plurality of edges and a plurality of corners formed by the intersection of any two adjacent edges of the edge, and is used for connection. The optical adhesive layer of the cover sheet and the optical film covers the edge of the first surface and exposes a portion of the corner and the adjacent corner. In this way, the optical adhesive layer is not bonded to the corner of the optical film, and the optical film and the optical adhesive layer can be prevented from being peeled off due to stress generated at the corner when the display module is subjected to the mechanism test. Furthermore, since the optical adhesive layer extends from the light-transmitting region of the cover plate to the shielding region, it is possible to prevent the air bubbles from being generated in the vicinity of the optical adhesive layer adjacent to the light-transmitting region during the assembly process of the display module to affect the visual display module. effect. Accordingly, the display module of the present invention has better reliability.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

100‧‧‧ display module

120‧‧‧Optical diaphragm

122‧‧‧ first surface

Edge of 122a‧‧

122b‧‧‧ corner

130‧‧‧ Cover

132‧‧‧Light transmission area

134‧‧ ‧ shaded area

140‧‧‧Optical adhesive layer

142‧‧‧ Turning Department

D‧‧‧distance

Claims (10)

A display module includes: a display panel having a display surface; an optical film disposed on the display surface, wherein the optical film has a first surface facing away from the display panel, and the first surface a plurality of edges and a plurality of corners formed by the intersection of any two of the edges; a cover plate disposed on the first surface of the optical film and covering the first surface; and an optical a glue layer disposed between the cover plate and the optical film, and connecting the cover plate and the optical film, wherein the optical adhesive layer covers the edges of the first surface, and exposing the corners and abutting the edge Some areas of the corner. The display module of claim 1, wherein the cover plate has a light transmissive area and a shielding area located outside the light transmissive area, the light transmissive area corresponding to the display surface, and the optical adhesive The layer is disposed in the light transmissive region and extends to the shielding region. The display module of claim 2, wherein the optical adhesive layer extends to a distance of 0.6 mm (mm) or more from the shielding area. The display module of claim 1, wherein the corners of the first surface comprise a plurality of right angles. The display module of claim 1, wherein the optical adhesive layer has a plurality of turning portions, and the turning portions correspondingly expose the corners. The display module of claim 5, wherein the edges of the vertical projections of the turning portions on the cover plate are arcuate. The display module of claim 5, wherein the edge of the vertical projection of the turning portion on the cover plate presents a straight line. The display module of claim 5, wherein the vertical projection edges of the turning portions on the cover plate present a right angle concave into the optical adhesive layer. The display module of claim 1, further comprising: a touch unit disposed between the cover and the display panel. The display module of claim 1, wherein the optical film comprises a polarizer.