TWI509189B - Display and backlight module and lighting module thereof - Google Patents

Description

Display and backlight module thereof and light source module thereof

The invention relates to a light source module, in particular to a light source module capable of reducing the generation of bright spots.

Referring to FIG. 1 , a conventional backlight module 1 including a flexible circuit board 10, a light source 20, and a light guide plate 30 is shown. Traditionally, the backlight module 1 has only a relatively uniform light range within the range of the A1 area indicated in the figure, so that the effective display area of the conventional display generally falls within the A1 area. However, in recent years, due to the thin and light requirements of portable electronic products, large-size screens are required at the same time. Therefore, only the A1 area is used as an effective display area, which cannot meet the market demand, and a larger A2 area needs to be used as an effective display area. However, since the edge of the A2 region is too close to the light source 20, there is a bright spot near the edge portion of the light source 20, which affects the visual appearance.

The present invention provides a light source module for solving the problems of the prior art, comprising a flexible circuit board and a plurality of light emitting elements. The flexible circuit board includes a cover film, a light shielding layer, and a metal layer. A cover film covers the metal layer. The light shielding layer covers the cover film, wherein a plurality of notches are formed on the light shielding layer, and a plurality of light absorption portions are respectively formed in the gaps. The light-emitting elements are disposed on the flexible circuit board, wherein the light-absorbing portions respectively correspond to the light-emitting elements, and the light portions provided by the light-emitting elements are partially passed by the light-absorbing portion Absorbed.

The invention further provides a light source module comprising a flexible circuit board and a plurality of light emitting elements. The flexible circuit board includes a cover film, a light shielding layer, and a metal layer. A cover film covers the metal layer. A light shielding layer covers the cover film, wherein the light shielding layer exhibits a dark color. The light emitting elements are disposed on the flexible circuit board, wherein the light portions provided by the light emitting elements are partially absorbed by the light shielding layer.

According to the embodiment of the present invention, since the light absorbing portion or the light shielding layer absorbs light and stray light, the occurrence of bright spots can be avoided. The uniformity of light in the effective display area is increased, and the visual appearance is enhanced.

Referring to FIG. 2A, a light source module 101 of a backlight module according to a first embodiment of the present invention includes a flexible circuit board 110 and a plurality of light emitting elements 150. The flexible circuit board 110 includes a metal layer 120, a first cover film 131, a second cover film 132, and a light shielding layer 140. The first cover film 131 covers the upper portion of the metal layer 120, and the second cover film 132 covers the lower portion of the metal layer 120. The first cover film 131 is covered by the light shielding layer 140 , and a plurality of notches 141 are formed on the light shielding layer 140 . Referring to FIG. 2B, a plurality of light absorbing portions 160 are formed in the notches 141, respectively. The light-emitting elements 150 are disposed on the flexible circuit board 110, wherein the light-absorbing portions 160 respectively correspond to the light-emitting elements 150, and the light portions provided by the light-emitting elements 150 are absorbed by the light-absorbing portion 160.

In this embodiment, the first cover film 131 is transparent or translucent. The metal layer 120 may include rolled copper, so that the upper portion of the metal layer 120 is Dark (black). Since the first cover film 131 is transparent or translucent, the color (dark color) above the metal layer 120 is exposed in the notches 141 to become the light absorbing portions 160.

Referring to FIGS. 2B and 2C , the light source module 101 of the first embodiment of the present invention is suitable for use in a backlight module 200 . The backlight module 200 further includes a light guide plate 30 and a light reflecting plate 40 . The light guide plate 30 covers the notches 141. The light guide plate 30 includes a light incident surface 31, a reflective surface 32, and a light exit surface 33. The reflector 40 is disposed on a portion of the reflective surface 32. The light 151 provided by the light-emitting elements 150 enters the light guide plate 30 on the light-incident surface 31, and a portion of the light 151 passes through the light-reflecting surface and is absorbed by the light-absorbing portion 160, and the other portion of the light 151 passes through the light-receiving portion 160. After the reflection plate 40 is reflected, it is emitted through the light exit surface 33.

The shape of the notches 141 may be square, trapezoidal or other suitable shape. The distance between the light absorbing portion 160 and the light source 150 may be 0.8 mm.

With the first embodiment of the present invention, since the light absorbing portion 160 absorbs light and stray light, generation of bright spots can be avoided. The uniformity of light in the effective display area (A2 area) is increased, and the visual appearance is enhanced.

Referring to Figures 3A and 3B, a light source module 102 according to a second embodiment of the present invention is shown, comprising a flexible circuit board 110' and a plurality of light-emitting elements 150. The flexible circuit board 110' includes a metal layer 120, a first cover film 131', a second cover film 132, and a light shielding layer 140. The light source module 102 of the second embodiment of the present invention is characterized in that the first cover film 131' is dark, and the first cover film 131' is exposed in the notches 141 to become the light absorbing portion 160'. The first cover film 131' can be directly formed by ink printing Above the metal layer 120, the surface thereof is dark; or the material of the first cover film 131' itself may be dark. In this embodiment, the effect of light absorption is provided by the dark first cover film 131', and therefore the color of the metal layer 120 is not important in this embodiment, and the material thereof can be appropriately changed.

The light source module 102 of the second embodiment of the present invention can be used in combination with the backlight module 200 of the first embodiment. The arrangement of the light guide plate and the reflector is the same as that of the first embodiment, and therefore will not be described again.

Referring to FIGS. 4A and 4B, a light source module 103 according to a third embodiment of the present invention includes a flexible circuit board 110" and a plurality of light emitting elements 150. The flexible circuit board 110" includes a metal layer 120 and a first cover film. 131. Second cover film 132 and light shielding layer 140'. The first cover film 131 covers the upper portion of the metal layer 120, and the second cover film 132 covers the lower portion of the metal layer 120. The light shielding layer covers the first cover film 131, wherein the light shielding layer 140' exhibits a dark color. The light-emitting elements 150 are disposed on the flexible circuit board 110", wherein the light portions provided by the light-emitting elements 150 are partially absorbed by the light-shielding layer 140'.

Referring to FIGS. 4B and 4C, the light source module 103 of the third embodiment of the present invention is suitable for use in a backlight module 200'. The backlight module 200' further includes a light guide plate 30 and a light reflecting plate 40. The light guide plate 30 covers the light shielding layer 140'. The light guide plate 30 includes a light incident surface 31, a reflective surface 32, and a light exit surface 33. The reflector 40 is disposed on a portion of the reflective surface 32. The light provided by the light-emitting elements 150 enters the light guide plate 30 on the light-incident surface 31, and a portion of the light 151 passes through the light-reflecting surface 32 and is absorbed by the light-shielding layer 140', and the other portion of the light 151 is 151. After being reflected by the reflector 40, wear The light exit surface 33 is emitted and emitted.

The light shielding layer 140' may be dark on the surface thereof by ink printing; or the material of the light shielding layer 140' may itself be dark. In this embodiment, the effect of light absorption is provided by the dark light-shielding layer 140', so in this embodiment, the colors of the metal layer 120 and the cover film 131 are not important, and the material thereof can be appropriately changed.

The light source module and the backlight module of the embodiment of the present invention can be applied to a display, the display includes a display module, and the display module corresponds to the backlight module, wherein the light provided by the light-emitting elements is The backlight module is emitted toward the display module and modulated by the display module to form an image. In addition, optical elements such as cymbals and polarizers may be disposed in the display as needed.

Although the present invention has been described above in terms of the preferred embodiments thereof, it is not intended to limit the invention, and those skilled in the art can make some modifications and refinements without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

1‧‧‧Backlight module

10‧‧‧Soft circuit board

20‧‧‧Light source

30‧‧‧Light guide

31‧‧‧Into the glossy surface

32‧‧‧reflective surface

33‧‧‧Glossy

40‧‧‧reflector

101, 102, 103‧‧‧ light source module

110, 110’, 110”‧‧‧ Flexible circuit boards

120‧‧‧metal layer

131, 131', 132‧‧‧ cover film

140, 140’‧‧‧ shading layer

141‧‧ ‧ gap

150‧‧‧Lighting elements

151‧‧‧Light

160, 160' ‧ ‧ absorbing department

200, 200'‧‧‧ backlight module

1 is a conventional backlight module; FIG. 2A is an exploded view of a light source module of a backlight module according to a first embodiment of the present invention; and FIG. 2B is a view showing a backlight module of the first embodiment of the present invention; 2C is a cross-sectional view showing a backlight module according to a first embodiment of the present invention; FIG. 3A is an exploded view showing a light source module according to a second embodiment of the present invention; and FIG. 3B is a second embodiment of the present invention. FIG. 4A is a top view showing a backlight module of a third embodiment of the present invention; and FIG. 4B is a top view showing a backlight module according to a third embodiment of the present invention; and FIG. 4C is a top view of the light source module of the third embodiment of the present invention; A cross-sectional view of a backlight module of a third embodiment of the present invention is shown.

101‧‧‧Light source module

110‧‧‧Soft circuit board

120‧‧‧metal layer

131, 132‧‧‧ Cover film

140‧‧‧Lighting layer

141‧‧ ‧ gap

150‧‧‧Lighting elements

Claims (12)

A light source module comprising: a flexible circuit board comprising: a metal layer; a first cover film covering the metal layer; and a light shielding layer covering the first cover film, wherein the light shielding layer is formed thereon a plurality of notches, each of the plurality of light absorbing portions being formed in the gaps; and a plurality of light emitting elements disposed on the flexible circuit board, wherein the light absorbing portions respectively correspond to the light emitting elements, the first cover film It is dark, and the first cover film is exposed in the gaps to become the light absorbing portions. The light source module of claim 1, wherein the first cover film is directly formed on the metal layer by ink printing to make the surface appear dark. The light source module of claim 1, wherein the material of the first cover film itself is dark. The light source module of claim 1, wherein the notches are square or trapezoidal in shape. The light source module of claim 1, further comprising a second cover film covering the metal layer. A light source module includes: a flexible circuit board comprising: a metal layer; a first cover film covering the metal layer; a second cover film covering the metal layer; a light shielding layer covering the first cover film, wherein the light shielding layer is dark; and a plurality of light emitting elements disposed on the flexible circuit board, wherein The portion of the light provided by the illuminating element is absorbed by the opaque layer. A backlight module includes: a light source module, comprising: a flexible circuit board comprising: a metal layer; a first cover film covering the metal layer; and a light shielding layer covering the first cover film, wherein a plurality of notches are formed on the light shielding layer, and a plurality of light absorption portions are respectively formed in the gaps; and a plurality of light emitting elements are disposed on the flexible circuit board, wherein the light absorption portions respectively correspond to the light emitting elements And the light guide plate is covered by the light absorbing portion; The light provided by the light-emitting elements enters the light guide plate on the light-incident surface, a portion of the light passes through the light-reflecting surface and is absorbed by the light-absorbing portion, and the other portion of the light is reflected by the reflective surface. The first cover film is dark in color, and the first cover film is exposed in the notches to become the light absorbing portions. The backlight module of claim 7, wherein the The first cover film is formed directly on the metal layer by ink printing to make the surface appear dark. The backlight module of claim 7, wherein the material of the first cover film itself is dark. The backlight module of claim 7, wherein the notches are square or trapezoidal in shape. A display module comprising: the backlight module of claim 7; and a display module corresponding to the backlight module, wherein the light provided by the light emitting elements is directed from the backlight module toward the display The module is ejected and modulated by the display module to form an image. A display module includes: a backlight module, comprising: a light source module, comprising: a flexible circuit board comprising: a metal layer; a first cover film covering the metal layer; and a light shielding layer covering the first a cover film, wherein the light shielding layer is dark; a plurality of light emitting elements are disposed on the flexible circuit board, wherein a portion of the light provided by the light emitting elements is absorbed by the light shielding layer; and a light guide plate, wherein The light guide plate covers the light shielding layer, and the light guide plate includes a light incident surface, a reflective surface, and a light emitting surface, wherein the light emitting layer The light provided by the component enters the light guide plate on the light incident surface, a portion of the light passes through the light reflecting surface and is absorbed by the light shielding layer, and another portion of the light is reflected by the reflective surface and passes through the light emitting surface. And a display module corresponding to the backlight module, wherein the light provided by the light-emitting elements is emitted from the backlight module toward the display module, and is modulated by the display module to form an image.