TWM562408U - Display device - Google Patents

Abstract

A display device includes a display module and a backlight module. The display module has a visual region and a periphery region. The backlight module includes an inner frame, a circuit board, a plurality of light sources, a light guide plate and a glue layer. The circuit board is accommodated in the inner frame. The light guide plate has a light incident surface and a light emitting surface. A position of the light sources corresponds to the light incident surface. The light incident surface has a dimming area and a display area. The display area is overlapped with the visual region. The glue layer includes a glue structure. The glue structure is disposed between a light emission region of the first light source and a light emission region of the second light source. The shape of the colloidal structure vertically projected onto the light guide plate is bullet type.

Description

Display device

The present invention relates to a display device, and more particularly to a display device including a colloidal structure.

At present, most display devices on the market include a display module and a backlight module. The display module can be used to control the shape and color of the image, and the backlight module is responsible for providing a light source to the display module.

In the conventional backlight module, the direction of the light emitted by the light source is adjusted by the light guide plate. However, during the manufacturing process of the display device, a gap is often generated between the light guide plate and the light source due to expansion and contraction, which causes the direction of the light to deviate from the ideal direction, causing the brightness of the display device to decrease. Therefore, there is a need for a method that can solve the aforementioned problems.

The novel creation provides a display device which can improve the problem of creating a gap between the light guide plate and the light source.

A display device created by the present invention comprises a display module and a backlight module. The display module has an adjacent viewable area and a peripheral area. The backlight module is stacked on the display module. The backlight module comprises an inner frame, a circuit board, a plurality of light sources, a light guide plate and a glue layer. The board is housed in the inner frame. The light sources are arranged on the circuit board along the first direction and include adjacent first and second light sources. The light guide plate has a light incident surface and a light emitting surface. The position of the light source corresponds to the light incident surface. The light emitting surface has a light mixing area and a display area. The light mixing area is located between the light incident surface and the display area. The display area position corresponds to the visible area. The glue layer is disposed between the circuit board and the light guide plate. The position of the glue layer corresponds to the light mixing zone. The glue layer contains a colloidal structure. The colloidal structure is located between a range of illumination of the first source and a range of illumination of the second source. The shape of the colloidal structure vertically projected on the light guide plate is a bullet type.

A display device created by the present invention comprises a display module and a backlight module. The display module has an adjacent viewable area and a peripheral area. The backlight module is stacked on the display module. The backlight module comprises an inner frame, a circuit board, a plurality of light sources, a light guide plate and a colloidal structure. The board is housed in the inner frame. A plurality of light sources are arranged on the circuit board along the first direction. The light source includes adjacent first and second light sources. The light guide plate has a light incident surface and a light emitting surface. The position of the light source corresponds to the light incident surface. The light emitting surface has a light mixing area and a display area. The light mixing area is located between the light incident surface and the display area. The display area position corresponds to the visible area. The colloidal structure is located between a range of illumination of the first source and a range of illumination of the second source. The colloidal structure includes opposing first and second sidewalls. The first side wall and the second side wall respectively have a first side and a second side connected. The first side is substantially orthogonal to the light incident surface, and the inner angle intersecting the first side and the second side is an obtuse angle.

A display device created by the present invention comprises a display module and a backlight module. The display module has an adjacent viewable area and a peripheral area. The backlight module is stacked on the display module. The backlight module comprises an inner frame, a circuit board, a plurality of light sources, a light guide plate and a colloidal structure. The board is housed in the inner frame. A plurality of light sources are arranged on the circuit board along the first direction. The light source includes adjacent first and second light sources. The first light source and the second light source respectively have a first light emitting range and a second light emitting range. There is a gap range between the first illumination range and the second illumination range. The gap range corresponds to a dark area on the board. The light guide plate has a light incident surface and a light emitting surface. The position of the light source corresponds to the light incident surface. The light emitting surface has a light mixing area and a display area. The light mixing area is located between the light incident surface and the display area. The display area position corresponds to the visible area. The colloidal structure is disposed between the circuit board and the light guide plate. The area of the vertical projection of the colloidal structure on the circuit board occupies more than 80% of the dark area.

The above described features and advantages of the present invention will become more apparent and understood from the following description.

1A is a top plan view of a display device in accordance with an embodiment of the present invention. Fig. 1B is a schematic cross-sectional view taken along line AA' of Fig. 1A. 1C is a partial top plan view of a display device in accordance with an embodiment of the present invention. FIG. 1C only shows the circuit board, the plurality of light sources, the light guide plate, and the glue layer, and other components are omitted.

Referring to FIG. 1A , FIG. 1B and FIG. 1C , a display device 10 of the present invention comprises a display module 100 and a backlight module 200 . 1B is, for example, a position corresponding to the line AA' in FIGS. 1A and 1C.

The display module 100 has a visible area AA and a peripheral area PA adjacent to the visible area AA. The visible area AA is, for example, an area corresponding to the display device 10 that can display an image, and the inside thereof includes, for example, a pixel array, a liquid crystal, a polarizer, and the like. The peripheral area PA includes components such as a drive circuit, a test circuit, and the like, and is covered by, for example, a black matrix.

The backlight module 200 is stacked on the display module 100. In some embodiments, the display module 100 is adhered to the backlight module 200 by, for example, the adhesive 110, but the present invention is not limited thereto. The backlight module 200 includes an inner frame 210, a circuit board 220, a plurality of light sources 230, a light guide plate 240, and a glue layer 250.

The cross-sectional profile of the inner frame 210 includes, for example, a C-shaped groove. The circuit board 220 and the light guide plate 240 can be received in the inner frame 210. In other words, the circuit board 220 and the light guide plate 240 can be sandwiched in the C-shaped groove of the inner frame. Referring to FIG. 1B and FIG. 1C , the light source 230 is arranged on the circuit board 220 along the first direction D1 and includes the adjacent first light source 232 and the second light source 234 . The first light source 232 has a light emitting range R1, and the second light source 234 has a light emitting range R2. The illumination range R1 and the illumination range R2 are, for example, substantially a fan-shaped region having an angle of 100 to 150 degrees, respectively, viewed from a second direction D2 perpendicular to the backlight module 200 (that is, viewed from a top view), for example, An angle of 120 degrees is a preferred range of illumination. There is a gap range between the light-emitting range R1 and the light-emitting range R2, and the gap range corresponds to the dark area DR on the circuit board 220. In the present embodiment, the light-emitting range is defined by the normal direction of the light-emitting surface of the light source, and the brightness in the normal direction is regarded as 100%. The brightness measurement is performed on both sides of the normal line based on the normal line. When the brightness is reduced to 50%, the inner angle range covered by the two sides is the light-emitting range of the light source. As a result, the brightness of the dark area DR will be lower than the light-emitting range. However, the present invention is not limited thereto, and the brightness reduction ratio of the light-emitting range may be adjusted depending on the demand.

In the present embodiment, the light guide plate 240 has a light incident surface I, a light emitting surface E, and a bottom surface B with respect to the light emitting surface E. The position of the light source 230 corresponds to the light incident surface I. The light emitted by the light source 230 enters the light guide plate 240 from the light incident surface I, and is separated from the light emitting surface E of the light guide plate 240. For example, the backlight module 200 of FIG. 1B can be a side-entry backlight module. In FIG. 1B, the light-emitting surface E has a light-mixing area MA and a display area DA such that the light-mixing area MA is located between the light-incident surface I and the display area DA. The viewing area AA of the display module 100 corresponds to the display area DA of the backlight module 200 in terms of the overlapping relationship between the display module 100 and the backlight module 200. Specifically, the display area DA overlaps the viewable area AA in the direction of vertical projection. In some embodiments, a reflective layer RL1 is disposed between the bottom surface B of the light guide plate 240 and the inner frame 210 to improve the utilization of the light source.

In this embodiment, the circuit board 220 is disposed on the light emitting surface E of the light guide plate 240, that is, the circuit board 220 is disposed above the light guide plate 240, but the present invention is not limited thereto. In other embodiments, the circuit board 220 is disposed on the bottom surface B of the light guide plate 240 such that the circuit board is disposed below the light guide plate 240. In this embodiment, the circuit board 220 further includes a reflective layer RL2 such that the reflective layer RL2 is located between the circuit board 220 and the light guide plate 240 to optimize the utilization of the light source, but the present invention is not limited thereto.

In the present embodiment, the optical film OF1, the optical film OF2, and the optical film OF3 are disposed between the light guide plate 240 and the display module 100. The optical film OF1, the optical film OF2, and the optical film OF3 are, for example, Quantum Dot Enhancement Film (QDEF), phosphor film, diffusion film (Diffuser film), light guide film (Light Guide film), A combination of a Prism film, a Dual Brightness Enhancement Film (DBEF), a Diffraction film or other optical film or the above optical film. The type or number of optical films is not limited to this embodiment or the above description.

In this embodiment, the adhesive layer 250 is disposed between the circuit board 220 and the light guide plate 240, and the circuit board 220 and the light guide plate 240 are mutually positioned through the adhesive layer 250. The position of the adhesive layer 250 corresponds to the light mixing area MA. Therefore, the glue layer 250 does not affect the light uniformity and light extraction efficiency of the display area DA. As shown in FIG. 1C , the adhesive layer 250 includes a colloidal structure 252 , that is, the colloidal structure 252 is disposed between the circuit board 220 and the light guide plate 240 . In detail, the colloidal structure 252 is located between the light-emitting range R1 of the first light source 232 and the light-emitting range R2 of the second light source 234. In some embodiments, the material of the colloidal structure 252 comprises an OCA optical glue, an OCR optical glue, or other suitable material.

In this embodiment, the shape of the colloidal structure 252 perpendicularly projected on the light guide plate 240 is a bullet type. For example, the colloidal structure 252 includes a first side wall SW1 and a second side wall SW2, wherein the first side wall SW1 is adjacent to the first light source 232, and the second side wall SW2 is adjacent to the second light source 234. Specifically, the first side wall SW1 has a first side surface F1 and a second side surface F2 connected thereto, and the second side wall SW2 has a first side surface F3 and a second side surface F4 connected thereto. The first side faces F1, F3 and the light incident surface I are substantially orthogonal, and the inner angle α at which the first side face F1 intersects the second side face F2 is an obtuse angle, and the inner angle β at which the first side face F3 intersects with the second side face F4 is an obtuse angle. . For example, when the illuminating range R1 and the illuminating range R2 are, for example, substantially a fan-shaped region having an angle of 120 degrees, respectively, the inner angle α and the inner angle β are about 140 degrees to 150 degrees, wherein the inner angle α and the inner angle β are 144 degrees is better. In the present embodiment, the inner angle α is substantially the same as the inner angle β, but the present creation is not limited thereto. In the embodiment of FIG. 1C, the colloidal structure 252 is formed by a combination of a rectangular shape and a trapezoidal shape, such that the end of the colloidal structure 252 facing the light guide plate 240 is a flat surface. In the modification of FIG. 1D, the colloidal structure 252 is formed by a bullet shape in which a rectangular shape and a triangular shape are combined, so that the end of the colloidal structure 252 facing the light guide plate 240 has an acute angle structure. In the modification of FIG. 1E, the colloidal structure 252 is in the shape of a bullet that is combined by a rectangle, a trapezoid, and an arc (or a semicircle). In other modifications, the rectangular shape of the above-mentioned colloidal structure 252 may be replaced by a quadrilateral, which is not illustrated and described herein.

In the present embodiment, the colloidal structure 252 is spaced apart from the first light source 232 and the second light source 234 by a distance S, respectively. For example, the spacing S is greater than 0 mm and less than or equal to 0.3 mm. By leaving the spacing S, the process margin for making the colloidal structure 252 can be increased.

In the present embodiment, the shortest distance between the center of the first light source 232 and the center of the second light source 234 is the first distance L1, and the shortest distance between the light incident surface I and the display area DA is the second distance L2. The ratio of the second distance L2 to the first distance L1 is greater than 1, for example, the ratio of the second distance L2 to the first distance L1 is 1 to 1.2. In the preferred embodiment, the area of the vertical projection of the colloidal structure 252 on the circuit board 220 occupies more than 80% of the dark area DR area. Under the demand of high brightness, the number of light sources in the backlight module needs to be increased. If the size of the backlight module is not increased, the spacing between adjacent light sources becomes smaller, which results in the formation of a colloidal structure 252. The area of the dark area DR is also reduced. With the bullet-type colloidal structure 252, the colloidal structure 252 can be effectively disposed by using the dark area DR while taking into account the process margin, thereby better fixing the light guide plate and the light source. Relative position.

In summary, the display device of the present invention has a colloidal structure, and the colloidal structure helps to fix the relative positions of the light guide plate and the light source, thereby improving the gap between the light guide plate and the light source due to expansion and contraction, so that the display The brightness of the device can be increased.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the novel creation, and any person skilled in the art can make some changes without departing from the spirit and scope of the novel creation. Retouching, the scope of protection of this new creation is subject to the definition of the scope of the patent application attached.

10‧‧‧ display device
100‧‧‧ display module
110‧‧‧Viscos
200‧‧‧Backlight module
210‧‧‧ inside frame
220‧‧‧Circuit board
230‧‧‧Light source
232‧‧‧First light source
234‧‧‧second light source
240‧‧‧Light guide plate
250‧‧ ‧ glue layer
252‧‧‧Colloidal structure
AA‧‧ visible area
B‧‧‧ bottom
D1‧‧‧ first direction
D2‧‧‧ second direction
DA‧‧‧ display area
DR‧‧‧ Dark Area
E‧‧‧Lighting surface
F1, F3‧‧‧ first side
F2, F4‧‧‧ second side
I‧‧‧Into the glossy
L1‧‧‧ first distance
L2‧‧‧Second distance
MA‧‧‧Huangguang District
OF1, OF2, OF3‧‧‧ optical film
PA‧‧‧ surrounding area
R1, R2‧‧‧Lighting range
RL1, RL2‧‧‧ reflection layer
S‧‧‧ spacing
SW1‧‧‧ first side wall
SW2‧‧‧Second side wall α, β‧‧‧ inside corner

1A is a top plan view of a display device in accordance with an embodiment of the present invention. Fig. 1B is a schematic cross-sectional view taken along line AA' of Fig. 1A. 1C is a partial top plan view of a display device in accordance with an embodiment of the present invention. 1D is a top plan view of a colloidal structure in accordance with an embodiment of the present invention. 1E is a top plan view of a colloidal structure in accordance with an embodiment of the present invention.

Claims (10)

A display device comprising: a display module having an adjacent one of a visible area and a peripheral area; and a backlight module stacked on the display module, the backlight module comprising: an inner frame; a circuit board, The light source is arranged on the circuit board along a first direction, and the light sources comprise a first one of the first light source and a second light source; And a light emitting surface, wherein the light source positions correspond to the light incident surface, and the light emitting mask has a light mixing area and a display area, wherein the light mixing area is located between the light incident surface and the display area, And the display area corresponds to the visible area; and a glue layer is disposed between the circuit board and the light guide plate, and the position corresponds to the light mixing area, wherein the glue layer comprises a colloidal structure, and the glue structure is located The light-emitting range of the first light source is between the light-emitting range of the second light source, and the shape of the colloidal structure perpendicularly projected on the light guide plate is a bullet type. The display device of claim 1, wherein the colloidal structure comprises a first sidewall and a second sidewall, the first sidewall is adjacent to the first light source, and the second sidewall is adjacent to the second light source. And the first side wall and the second side wall respectively have a first side and a second side connected to each other, and the inner side intersecting the second side is an obtuse angle. The display device of claim 1, wherein the colloidal structure is spaced apart from the first light source and the second light source by a distance. A display device comprising: a display module having an adjacent one of a visible area and a peripheral area; and a backlight module stacked on the display module, the backlight module comprising: an inner frame; a circuit board, The light source is arranged on the circuit board along a first direction, and the light sources comprise a first one of the first light source and a second light source; And a light emitting surface, wherein the light source positions correspond to the light incident surface, and the light emitting mask has a light mixing area and a display area, wherein the light mixing area is located between the light incident surface and the display area, and The display area is overlapped with the visible area; and a colloidal structure is located between the illumination range of the first light source and the illumination range of the second light source, and the colloidal structure includes a first sidewall and a second sidewall. The first side wall and the second side wall respectively have a first side and a second side, wherein the first side is substantially orthogonal to the light incident surface, and the first side and the second side intersect The angle is an obtuse angle. The display device of claim 4, wherein the colloidal structure is vertically projected on the light guide plate in a bullet shape. The display device of claim 4, wherein the colloidal structure is spaced apart from the first light source and the second light source, respectively. A display device comprising: a display module having an adjacent one of a visible area and a peripheral area; and a backlight module stacked on the display module, the backlight module comprising: an inner frame; a circuit board, Storing in the inner frame; a plurality of light sources arranged on the circuit board along a first direction, and the light sources comprise a first one of the first light source and a second light source, the first light source and the second light source The light source has a first light-emitting range and a second light-emitting range, and the first light-emitting range and the second light-emitting range have a gap range corresponding to a dark area on the circuit board; Having a light incident surface and a light emitting surface, wherein the light source positions correspond to the light incident surface, and the light emitting mask has a light mixing area and a display area, wherein the light mixing area is located on the light incident surface and the display Between the regions, and the display region corresponds to the visible region; and a colloidal structure disposed between the circuit board and the light guide plate, wherein an area of the vertical projection of the colloidal structure on the circuit board occupies the dark region 80% of the area the above. The display device of claim 7, wherein the colloidal structure is spaced apart from the first light source and the second light source, respectively. The display device of claim 7, wherein the colloidal structure is vertically projected on the light guide plate in a bullet shape. The display device of claim 7, wherein a shortest distance between a center of the first light source and a center of the second light source is a first distance, and a shortest distance between the light incident surface and the display area The distance is a second distance, and the ratio of the second distance to the first distance is greater than one.