A display module and bonding method thereof

Abstract

The invention relates to the technical field of liquid crystal display. The display module proposed by the present invention is sequentially provided with a backlight unit and a liquid crystal unit that are integrated by an edge-wrapping tape from one side to the other side. Lines coincide. Preferably, there is no gap between the liquid crystal unit and the backlight unit. In this display module, the outer contour size of the backlight unit is the same as that of the liquid crystal unit, and there is no protruding size of the plastic frame relative to the display unit in the prior art, thereby reducing the outer contour size of the display module and realizing The narrow frame design of the display module is improved, and at the same time, the distance between the outer contour edge of the backlight unit and the edge of the display area is increased, and light leakage around the backlight unit is avoided. When there is no gap between the liquid crystal unit and the backlight unit, the thickness of the display module is further reduced, and the narrow frame and thin design of the display module are realized.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to a display module and a bonding method thereof. Background technique [0002] Unlike self-illuminating CRTs and PDPs, liquid crystal displays require an external light source for display because the liquid crystal itself does not emit light. The light source located on the back of the display is called a backlight. According to the positional relationship between the light source (fluorescent lamp, LED, EL, etc.) and the light guide plate, the backlight can be divided into bottom type and side type. The advantage of the bottom-mounted backlight is that the light utilization rate is high, and it is easy to realize a large area. The disadvantage is that the brightness is uneven, the thickness is large, and because the outer wheel space of the side-mounted backlight unit is larger than the outline size of the liquid crystal unit, the display module However, as people'...

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Problems solved by technology

The advantage of the bottom-mounted backlight is that the light utilization rate is high, and it is easy to realize a large area. The disadvantage is that the brightness is uneven, the thickness is large, and because the outer wheel space of the side-mounted backlight unit is larger than the outline size of the liquid crystal unit, the display module However, as people's demand for portable devices such as notebook computers continues to increase, there is an urgent need for thinner, smaller bezel size, and higher brightness display modules

[0003] figure 1 It is a structural schematic diagram of the opposite side of the backlight light source of the display module in the prior art. The backlight unit includes a plastic frame 22, a reflection sheet 28, a light guide plate 26, and an optical film layer 25. The liquid crystal unit 1 and the backlight unit are bonded together through a bonding glue 21. Together, due to the existence of the plastic frame 22, the outer contour of the backlight unit is much larger than the outer contour of the liquid crystal unit 1, as shown in d1 in the figure, d1 is about 0.2-0.3 mm, which makes the frame of the display module smaller. In addition, since the liquid crystal unit 1 and the backlight unit are bonded together by bonding glue 21, in order to prevent ripples from appearing during display, it is necessary to leave a gap between the lower surface of the liquid crystal unit and the upper surface of the optical film layer 25. A certain gap, as shown in d2 in the figure, d2 is about 0.08mm, which undoubtedly increases the thickness of the display module; again, due to the existence of the plastic frame 22, in order to further realize the narrow frame design, the light guide plate can only be compressed inward edge, the distance d3 between the edge of the light guide plate 26 and the edge of the effective display area of ​​the liquid crystal unit 1 is too small, resulting in the risk of light leakage around the light guide plate, in order to avoid light leakage around the light guide plate, the value of d3 needs to reach 0.5mm , while the value of d3 in the prior art is far less than 0.5mm

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