Display apparatus

A display apparatus includes a frame, a panel module and an adjusting pad. The frame has a supporting surface, and the panel module includes a substrate and a plurality of chips. The substrate is disposed on the supporting surface and has a bonding region at a side of the substrate. The chips are disposed on the bonding region, wherein the chips and the supporting surface are located at two opposite surfaces of the substrate. The adjusting pad is disposed between the supporting surface and the bonding region, and the thickness of the adjusting pad is gradually reduced from a center portion of the adjusting pad toward two sides of the adjusting pad. Another display apparatus, in which a frame and an adjusting pad are integrated into one piece, is provided.

TECHNICAL FIELD

The invention relates to a display apparatus, in particularly to a flat panel display.

BACKGROUND

As the manufacturing technology of flat panel displays is more mature, traditional CRT displays have been replaced by the flat panel displays. Currently, typical flat panel displays include liquid crystal displays (LCDs), plasma displays (PDPs), electrophoretic displays and organic light emitting displays (OLEDs). Among these displays, the LCDs have the most popularity.

For satisfying needs of consumers, the LCDs with wide viewing angle and low color shifting have become the mainstream of market. The currently often used wide viewing angle technologies include in plane switching (IPS) and advanced hyper viewing angle (AHVA). However, during the manufacturing of the LCD devices, high heat and high pressure are needed to bond driver chips to the glass substrate of the LCD panel, in such a step, the glass substrate can easily be deformed to bend, which causes abnormal light leakage while the LCD device is in a normally black mode.

SUMMARY

An embodiment of the invention provides a display apparatus including a frame, a panel module and an adjusting pad. The frame has a supporting surface. The panel module includes a substrate and a plurality of chips. The substrate is disposed on the supporting surface and the substrate has a bonding region at a side thereof. The chips are disposed on the bonding region. The chips and the bonding region are located on the supporting surface. The chips and the supporting surface are respectively located at two opposite surfaces of the substrate. The adjusting pad is disposed between the supporting surface and the bonding region. The thickness of the adjusting pad is gradually reduced from the center toward the two sides thereof.

Another embodiment of the invention provides a display apparatus including a frame and a panel module. The frame has a supporting surface and a first adjusting pad protruding from the supporting surface. The panel module includes a substrate and a plurality of chips. The substrate is disposed on the supporting surface and the substrate has a bonding region at a side thereof. The first adjusting pad is located below the bonding region. The chips are disposed on the bonding region. The chips and the supporting surface are respectively located at two opposite surfaces of the substrate.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

FIG. 1is a schematic cross sectional view of a display apparatus according to an embodiment of the invention.FIG. 2is a schematic top view of a panel module inFIG. 1. Referring toFIG. 1andFIG. 2, the display apparatus100includes a frame110and a panel module120. The frame110has a supporting surface112, and the panel module120has a substrate122and a plurality of chips124. The substrate122is disposed on the supporting surface112, and the substrate122has a bonding region123at a side thereof. The chips124are disposed on the bonding region123. The chips124and the bonding region123are disposed above the supporting surface112. The chips124and supporting surface112are respectively located at above and below of the substrate122. In this embodiment, the material of the substrate122is, for example, glass, but not limited thereto. The substrate122, for example, includes an active device array (such like a thin film transistor array). The panel module120can further include another substrate126disposed on the substrate122. The panel module120has the function of displaying images and can be a liquid crystal display module, an organic light emitting display module, an eletrophoretic display module and an electrowetting display module, but not limited thereto.

Since the substrate122is easily deformed flexure when the chips124is being bonded to the bonding region123, the display apparatus100of this embodiment further includes an adjusting pad130disposed between the supporting surface112and the bonding region123for solving the problem of the flexure of the substrate122. The adjusting pad130of this embodiment is detailed below.

FIG. 3AandFIG. 3Bare schematic views showing the panel module is disposed on the supporting surface of the frame. In the drawings, only the substrate122and the chips124are used to represent the panel module120, and the supporting surface112is used to represent the frame110. AsFIG. 3Ashows, the adjusting pad130of the embodiment is used for leveling the flexural substrate122. Since after the chips124are bonded to the substrate122, the substrate122is affected by stress and is deformed to a shape that the center portion is downwardly bended. Accordingly, the thickness of the adjusting pad130is gradually reduced from the center toward the two sides thereof. In other words, the thickness variation of the adjusting pad130can be adjusted according to the degree of the flexure of the substrate122.

The manner of how to make the thickness of the adjusting pad gradually reduce from the center toward the two sides of the invention is not limited. In this embodiment, the adjusting pad130has a plurality of base materials (such as a first base material131, a second base material132and a third base material133) stacked with each other for forming the adjusting pad130with the thickness gradually reducing from the center toward the two sides. These base materials are such like adhesive tapes, but not limited thereto. These base materials of the adjusting pad130are, for example, stripe shaped and sequentially stacked, wherein the second base material132is disposed on the first base material131, and the third base material133is disposed on the second base material132. The thickness of each of the base material is determined according to the degree of the flexure of the substrate122. Generally speaking, the thickness of the base material is, for example, 0.0025 mm to 0.05 mm, but not limited thereto. The base material can be compressible material such as foam, or can be incompressible material such as polyethylene terephthalate (PET).

Following the above mentioned, for any two of the adjacent base materials, the length of the under base material is longer than the length of the upper base material. In other words, the length of the first base material131is longer than the length of the second base material132, and the length of the second base material132is longer than the length of the third base material133. Besides, for any two adjacent substrates, two side of the under base material has regions which are not overlapped by the upper substrate. And the regions have the same dimensions. That is, the two regions A1, A2of the first base material131which are not overlapped by the second base material132have the same dimensions. The two regions A3, A4of the second base material132which are not overlapped by the third base material133have the same dimensions.

The first base material131has a first surface S1and a second surface S2opposite to each other. The second base material132has a third surface S3and a fourth surface S4opposite to each other. The third base material133has a fifth surface S5and a sixth surface S6opposite to each other. The first surface S1is adhesive and is attached to the supporting surface112. The second surface S2is adhesive, and the third surface S3is attached to the second surface S2. The fourth surface S4and the sixth surface S6are nonadhesive. The fifth surface S5is adhesive and is attached to the fourth surface S4.

When a force F1 is exerted on the panel module to fix it on the supporting surface112of the frame110, the thicker center part of the adjusting pad130will first contact with the substrate122. During the time that the panel module120is continuously pressed, the thicker part of the adjusting pad130provides a reactive force F2 upwardly pushing the downwardly flexural part of the substrate122, thus leveling the substrate122. Therefore, asFIG. 3Bshows, when the two sides of the substrate122are attached to the exposed second surface S2of the first base material133, the flatness of the substrate122is well improved. The downgrade of the display quality of the display apparatus100(as shown inFIG. 1) caused from the flexure of the substrate122can be prevented.

In this embodiment, at least one of the chips124has a projection which is completely projected onto the top substrate of the adjusting pad130. In other words, the length of the third base material133is larger than or equal to the length of the single chip124, and the width of the third base material133is larger than or equal to the width of the single chip124. Besides, all the chips124are disposed over the second base material132. In addition, the first base material133on the bottom can use light shielding material as a light shielding layer for preventing light leakage from the edge of the substrate122.

It should be mentioned that although the adjusting pad130has three base materials in this embodiment, however, the number of the base materials is not limited thereto. The number of the base materials can be adjusted according to the degree of the flexure of the substrate122. Besides, since the frame110of the invention is a component used for carrying the panel module120, the specific structure of the frame is not limited.

Referring toFIG. 1, in an embodiment that the panel module120is a non-self emitting panel module (such as a liquid crystal panel module), the display apparatus100can further include a backlight module140disposed below the panel module120for providing the light needed by the panel module120. The backlight module140can include light emitting devices, light guiding plates and optical films. In other embodiment that the panel module120is a self emitting panel module (such as an organic light emitting panel module), or a reflective panel module (such as an electrophoretic panel module or an electrowetting panel module), the backlight module140can be omitted. Besides, in addition to dispose the adjusting pad130between the supporting surface112and the bonding region123, in case the flexure is occurred at the other side of the substrate122, the adjusting pad130can be disposed between the flexural side portion of the substrate122and the supporting surface112.

FIG. 4is a schematic view of a display apparatus according to another embodiment of the invention. Referring toFIG. 4, which is similar toFIG. 3B, only the substrate122and the chips124are used to represent the panel module, and the supporting surface112is used to represent the frame. The structure and advantages of display apparatus100aof this embodiment is similar to that of the display apparatus100of the above mentioned embodiment. The difference is that the first surface S1of the first base material133aof the adjusting pad130ais nonadhesive. A double sided tape150is disposed between the first surface S1of the adjusting pad130aand the supporting surface112for attaching the first surface S1to the supporting surface112. Besides, two ends of the first base material133aare, for example, further bended to the bonding region123, and the second surface S2of the first base material133ais, for example, adhered to the bonding region123and the back surface125of the substrate122.

FIG. 5is a schematic view of a display apparatus according to another embodiment of the invention. Referring toFIG. 5, which is similar toFIG. 3B, only the substrate122and the chips124are used to represent the panel module, and the supporting surface112bis used to represent the frame. The structure and advantages of display apparatus100bof this embodiment is similar to that of the display apparatus100of the above mentioned embodiment. The difference is that the frame of the embodiment has a first adjusting pad113protruding from the supporting surface112b. The first adjusting pad113is located between the supporting surface112band the bonding region123. The frame is, for example, a metal frame. The first adjusting pad113can be formed by punching the frame. The function of the first adjusting pad113is similar to the function of the above mentioned adjusting pad130and is not repeated herein. Besides, the display apparatus100bcan further include an adhering portion160attached between the supporting surface112band the substrate122. The adhering portion160is located at two sides of the first adjusting pad113. The adhering portion160is, for example, a double sided tape for fixing the substrate122to the supporting surface112b. Besides, the display apparatus100bcan include the above mentioned backlight module according to the type of the panel module.

In another embodiment, asFIG. 6shows, in addition to directly form the first adjusting pad113on the frame, a second adjusting pad170can further be attached to the supporting surface112b. The second adjusting pad170is located at two sides of the first adjusting pad113and bears against the first adjusting pad113. A top surface171of the second adjusting pad170facing the substrate is lower than a top surface114of the first adjusting pad113facing the substrate. In other words, the thickness or height of the second adjusting pad170is smaller than the thickness or height of the first adjusting pad113. Considering the degree of the flexure of the substrate, a third adjusting pad (not shown) having thickness thinner than the second adjusting pad170can be disposed adjacent to two sides of the second adjusting pad170. Moreover, a fourth adjusting pad (not shown) having thickness thinner than the third adjusting pad can be disposed adjacent to two sides of the third adjusting pad. Alternatively, a plurality of base material s can be stacked as the above mentioned embodiment to form the second adjusting pad with different thickness.

In conclusion, in the display apparatus of the invention, the adjusting pad can be used to bear against the flexural portion of the substrate and level the substrate, such that the downgrade of the display quality of the display apparatus caused from the flexure of the substrate can be prevented.