JP2016206367A - Display panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device capable of preventing image adhesion from occurring in a display panel.SOLUTION: A display device includes a display panel, a circuit board, an optical guide structure and two paste materials. The circuit board is arranged on the display panel. The optical guide structure is arranged on the display panel. The optical guide structure includes a bottom surface and a surrounding surface. The bottom surface is directed toward the display panel and the surrounding surface is adjacent to the bottom surface. Two plated pads are formed on the bottom surface. Two first cavities are formed on the surrounding surface, and the two first cavities correspond to the two plated pads. The two paste materials are formed between the two plated pads and the circuit board.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a display device, and more specifically to a display device that can prevent image sticking (image sticking) from occurring in a display panel.

  Referring to FIG. 1, FIG. 1 is a perspective view illustrating a display device 1 of the prior art. As shown in FIG. 1, the display device 1 includes a display panel 10, a circuit board 12, a light guide structure 14, and two paste materials 16. The circuit board 12 and the light guide structure 14 are disposed on the display panel 10. In general, there is a light source (not shown) disposed within the light guide structure 14 to form a front light module. In order to electrically connect the circuit board 12 and the light source, two paste materials 16 are formed between the circuit board 12 and the light guide structure 14. When the display device 1 is operated in a high temperature and high humidity environment for a long time (eg, 240 hours), the paste material 16 can be deformed due to thermal expansion and contraction, thus causing image sticking within the display panel. obtain.

  In order to solve the above-described problems, the present invention provides a display device that can prevent image sticking from occurring in a display panel.

  According to an embodiment of the present invention, the display device includes a display panel, a circuit board, a light guide structure, and two paste materials. The circuit board is disposed on the display panel. The light guide structure is disposed on the display panel. The light guide structure has a bottom surface and a peripheral surface, the bottom surface is directed toward the display panel, and the peripheral surface is adjacent to the bottom surface. Two plating pads are formed on the bottom surface. Two first recesses are formed on the peripheral surface, and the two first recesses correspond to two plating pads. Two paste materials are formed between the two plating pads and the circuit board.

  As described above, the present invention forms the first recess on the peripheral surface, and the first recess corresponds to the plating pad. When the paste material deforms due to thermal expansion and contraction, the first recess functions as a spring so that the plating pad can be pulled down when the paste material contracts and the plating pad can be lifted when the paste material expands. Therefore, the stress concentration is reduced in the paste material and image sticking is prevented from occurring in the display panel.

  These and other objects of the present invention will become apparent to those skilled in the art after reading the following detailed description of the preferred embodiment illustrated in the various drawings and figures.

It is a perspective view which shows the display apparatus of a prior art.

1 is a perspective view of a display device according to an embodiment of the present invention.

It is a perspective view which shows the light guide structure shown in FIG. 2 from another viewing angle.

FIG. 6 is a perspective view showing a display apparatus according to another embodiment of the present invention.

It is a perspective view which shows the light guide structure according to the other embodiment of this invention.

  2 and 3, FIG. 2 is a perspective view illustrating a display device 3 according to an embodiment of the present invention, and FIG. 3 is a perspective view illustrating the light guide structure shown in FIG. 2 from another viewing angle. It is.

  As shown in FIG. 2, the display device 3 includes a display panel 30, a circuit board 32, a light guide structure 34, and two paste materials 36. In this embodiment, display panel 30 may be a liquid crystal display (LCD) or other display panel, circuit board 32 may be a flexible printed circuit board (FPC) or other circuit board, and paste material 36 is silver. It may be a paste or other pace material. The light guide structure can be made of liquid crystal polymer (LCP), but is not limited thereto.

  The circuit board 32 and the light guide structure 34 are disposed on the display panel 30. In general, there is a light source (eg, a light emitting diode (not shown)) disposed within the light guide structure 34 to form a front light module. The light guide structure 34 has a bottom surface 340 and a peripheral surface 342. When the light guide structure 34 is disposed on the display panel 30, the bottom surface 340 is directed toward the display panel 30, and the peripheral surface 342 is Adjacent to the bottom surface 340. As shown in FIG. 3, two plating pads 344 are formed on the bottom surface 340. In addition, two first recesses 346 are formed in the peripheral surface 342 and the two first recesses 346 correspond to the two plating pads 344. Two paste materials 36 are formed between the two plating pads 344 and the circuit board 32 to electrically connect the circuit board 32 and a light source (not shown) in the light guide structure 34.

  When the paste material 36 is deformed due to thermal expansion and contraction, the first recess 346 is provided so that the plating pad 344 can be pulled down as the paste material 36 contracts and the plating pad 344 can be lifted up as the paste material 36 expands. Acts as a spring. Accordingly, stress concentrations in the pace material 36 are reduced and image sticking in the display panel 30 is prevented from occurring.

  The thickness T of the first recess 346 in the direction perpendicular to the bottom surface 340 is reduced so as to reduce stress concentration in the paste material 36 and more effectively prevent image sticking from occurring in the display panel 30. Preferably, the length L1 and L2 of the first recess 346 in the direction parallel to the bottom surface 340 can exceed the plating pad 344.

  In this embodiment, two first first recesses 346 may be formed so as to penetrate or not penetrate the inner wall of the light guide structure 34 depending on the actual application.

  Referring to FIG. 4 in conjunction with FIG. 2, FIG. 4 is a perspective view illustrating a display device 3 'according to another embodiment of the present invention. The difference between the display device 3 ′ and the aforementioned display device 3 is that, as shown in FIG. 4, the two first recesses 346 of the display device 3 ′ communicate with each other to form a single recess. It is formed as follows. In other words, the present invention can achieve the same function as the display device 3 described above by forming a single recess in the peripheral surface 342.

  Referring to FIG. 5 in conjunction with FIG. 3, FIG. 5 is a perspective view illustrating a light guide structure 34 'according to another embodiment of the present invention. The difference between the light guide structure 34 ′ and the light guide structure 34 described above is that the light guide structure 34 ′ is formed on the bottom surface 340 adjacent to the two plating pads 344 as shown in FIG. Two second recesses 348. When the light guide structure 34 shown in FIG. 2 is replaced with the light guide structure 34 ′ shown in FIG. 5, stress concentration in the paste material 36 is more efficiently reduced and image sticking occurs in the display panel 30. It can be prevented more efficiently.

  The width W of the second recess 348 in a direction parallel to the bottom surface 340 so as to more efficiently reduce stress concentration in the paste material 36 and more effectively prevent image sticking from occurring in the display panel 30. Is preferably 0.1 mm or more.

  In this embodiment, the second recess 348 may be formed to communicate with or not communicate with the first recess 346 depending on the actual application.

  As described above, the present invention forms the first recess on the peripheral surface, and the first recess corresponds to the plating pad. When the paste material deforms due to thermal expansion and contraction, the first recess functions as a spring so that the plating pad can be pulled down when the paste material contracts and the plating pad can be lifted when the paste material expands. Therefore, the stress concentration is reduced in the paste material, and image sticking is prevented from occurring in the display panel. Furthermore, the present invention provides a second surface on the bottom surface adjacent to the plating pad so as to more effectively reduce stress concentrations in the paste material and more effectively prevent image sticking from occurring in the display panel. A recess may be formed.

  Those skilled in the art will readily observe that numerous variations and modifications of the apparatus and method may be made while maintaining the teachings of the present invention. Accordingly, the above disclosure should be construed as limited only by the metes and bounds of the appended claims.

DESCRIPTION OF SYMBOLS 1 Display apparatus 10 Display panel 12 Circuit board 14 Light guide structure 16 Paste material 3 Display apparatus 3 'Display apparatus 30 Display panel 32 Circuit board 34 Light guide structure 34' Light guide structure 340 Bottom surface 342 Peripheral surface 344 Plate pad 346 1st Recess 348 Second recess 36 Paste material

Claims (8)

A display panel;
A circuit board disposed on the display panel;
A light guide structure disposed on the display panel;
Two paste materials,
The light guide structure has a bottom surface and a peripheral surface, the bottom surface is directed toward the display panel, the peripheral surface is adjacent to the bottom surface, and two plating pads are formed on the bottom surface. Two first recesses are formed in the peripheral surface and correspond to the two plating pads;
The two paste materials are formed between the two plating pads and the circuit board.
Display device.   The display device according to claim 1, wherein a thickness of the first recess in a direction perpendicular to the bottom surface is 0.1 mm or more.   The display device according to claim 1, wherein a length of the first recess in a direction parallel to the bottom surface does not exceed the plating pad.   The display device according to claim 1, wherein the two first recesses are formed so as to penetrate or not penetrate the inner wall of the light guide structure.   The display device of claim 1, wherein the two first recesses are formed to communicate with each other to form a single recess.   The display device according to claim 1, wherein two second recesses are formed on the bottom surface adjacent to the two plating pads.   The display device according to claim 6, wherein a width of the second recess in a direction parallel to the bottom surface is 0.1 mm or more.   The display device according to claim 6, wherein the second recess is formed so as to communicate with or not communicate with the first recess.

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