TWM641087U - Miniature backlight kit - Google Patents

Abstract

The utility mode provides a miniature backlight kit, including: a cover body, a light shielding element, a light guiding element, a casing and a light emitting unit. The light emitting unit is arranged in a first recess of the light shielding element, the light shielding element is arranged in a second recess of the light guiding element, and a side wall of the casing covers the light guiding element. A light emitted by the light emitting unit is transmitted to the side wall through the reflection of the light guide element, and forms a gradient brightness area on the side wall.

Description

Miniaturized Backlight Kit

This creation is related to a light source structure, especially a backlight kit applied to electronic devices.

LED has the characteristics of small size, low power consumption, long life and quick operation response. It has been widely used in signal lights, advertising lights, automobile and motorcycle light sources, outdoor or household lighting devices, monitors or computer peripherals and other electronic devices. backlight source.

However, in today's society, electronic devices have become necessary daily necessities of life. Due to the various styles of electronic devices and the increasing pressure of competition for the same category of products, manufacturers usually install LED light sources inside the electronic devices in order to make the electronic products they produce more recognizable. , so that the appearance of the electronic device produces a special luminous visual effect, in addition to attracting the attention of consumers, the convenience of use can also be improved through the setting of the LED light source, so as to win the favor of consumers and increase their willingness to purchase .

In the existing backlight technology, as shown in FIG. 1 , the backlight kit 90 includes: a casing 91 , a light guide element 92 and an LED light source 93 . The light guide element 92 includes a first light guide portion 921 and a second light guide portion 922 , and the thickness of the light guide element 92 decreases from the first light guide portion 921 to the second light guide portion 922 . The LED light source 93 is disposed below the first light guide portion 921 . When the LED light source 93 projects the light L toward the first light guide part 921, the thickness of the light guide element 92 changes to form a gradient brightness area B' on the surface of the light guide element 92, so that the miniaturized backlight can be configured. The electronics of Kit 90 create a gradient glow visual effect.

However, since the light guide element 92 includes a relatively thick first light guide portion 921 , this design is obviously not conducive to the reduction of the overall volume of the electronic device, and cannot meet the trend of thinner and lighter electronic products. In addition, because the LED is a point light source, there is usually a problem of too concentrated luminous points. Therefore, when the LED light source 93 directly projects the light L toward the first light guide part 921, it is easy to form a light spot in the gradient brightness area B', thereby affecting The overall gradient visual effect of the gradient brightness area B'.

Therefore, how to effectively reduce the overall volume of the electronic device equipped with the backlight kit and avoid the light spots produced by the LED light source from affecting the luminous visual effect formed is the technical problem to be solved in this creation.

The main purpose of this invention is to provide a miniaturized backlight kit that can be applied to electronic devices or peripheral ports thereof, and the miniaturized backlight kit can produce a gradient luminous visual effect.

To achieve the aforementioned purpose, this creation provides a miniaturized backlight kit, including: The cover body has a support portion; The light-shielding element is arranged on the supporting part and has a first surface and a second surface opposite to each other, and the second surface has a first recess; The light guide element is arranged on the supporting part and has a third surface and a fourth surface opposite to each other. The fourth surface has a second concave portion and a convex portion adjacent to each other. The second concave portion is used to accommodate the light shielding element so that the light guiding element Covering the first surface, and the open end of the first concave portion faces the convex portion, and the side of the convex portion away from the second concave portion has a reflective slope; the housing, which can be combined with the cover, has a side wall portion covering the third surface; and The light-emitting unit is arranged in the first recess and can emit light. The shading element blocks the light projected upwards and transmits the light to the reflective slope of the convex part. The reflective slope reflects the light to form multi-angle light projected toward the third surface; Wherein, the brightness of the multi-angle light gradually attenuates with the increase of the transmission distance and the decrease of the transmission medium during the transmission process of the light guide element, and the multi-angle light penetrates from the third surface and transmits to the side wall to form a gradient brightness area.

In the above preferred implementation manner, the light emitting unit is in the form of forward light emission.

In the preferred embodiment above, the light emitting unit is: a light emitting diode unit, an organic light emitting diode unit, a quantum dot light emitting diode unit or an electroluminescence unit.

In the above-mentioned preferred embodiment, wherein the reflective inclined surface has a white paint coating or a reflective sheet.

In the above preferred embodiment, the cover body includes a cover plate, and one side of the cover plate extends outward to form a support portion.

In the above-mentioned preferred embodiment, the opening is formed around the side wall, and the cover plate is installed in the opening.

In the above-mentioned preferred embodiment, the inner wall surface of the side wall portion has a stopper, and the same side of the light shielding element and the light guide element abuts against the stopper portion.

In the above preferred embodiment, the blocking portion has a bent rib extending toward the opening and fixed on the surface of the cover plate.

In the above-mentioned preferred embodiment, the convex portion extends downwards to form a plurality of light guiding ribs, and the light guiding ribs lean against the supporting portion to form a plurality of light channels between the convex portion and the supporting portion.

In the above preferred implementation manner, the light guiding element is made of light guiding material containing light diffusing material.

The beneficial effect of this creation is that the miniaturized backlight kit has a thin design, and can produce a gradient luminous visual effect, which can effectively reduce the overall volume of the electronic device equipped with the miniaturized backlight kit, and then meet the needs of electronic products. The development trend of light and thin. In addition, the light emitted by the light-emitting unit is transmitted to the light-emitting surface through the reflection of the light-guiding element, rather than being directly projected on the light-emitting surface, so that the problem of light spots in the gradient brightness area can be effectively reduced.

The advantages and features of the invention and methods for achieving them will be more easily understood with reference to the more detailed description of the exemplary embodiments and accompanying drawings. This invention may, however, be embodied in different forms and should not be construed as limited to the embodiments set forth herein. On the contrary, for those skilled in the art, these embodiments are provided to make this disclosure more thorough and comprehensive and fully convey the scope of this invention.

First, please refer to FIG. 2 , FIG. 3A and FIG. 3B . Figure 2 is a three-dimensional schematic diagram of the miniaturized backlight kit provided by this creation; Figure 3A is a perspective exploded view of the miniaturized backlight kit provided by this creation; Figure 3B is a miniaturized backlight kit provided by this creation An exploded perspective view from another perspective. The miniaturized backlight kit 1 provided by this creation can be arranged on an electronic device, such as the casing of a desktop computer, a notebook computer or the casing of its peripheral connection port, and can be prompted through the formed luminous visual effect The location of the connection port around the user, or the usage status of the connection port. The miniaturized backlight kit 1 includes: a cover body 10 , a light emitting module 20 , a light shielding element 30 , a light guiding element 40 and a casing 50 .

The cover body 10 includes a cover plate 11 and a support portion 12 extending outward from one side of the cover plate 11 . In this embodiment, the supporting portion 12 is disposed on the surface of one side of the cover plate 11 , and the cover plate 11 can be used for setting openings for peripheral connection ports.

The light emitting module 20 includes a flexible circuit board 21 and a plurality of light emitting units 22 , and the light emitting units 22 are disposed on a surface of the flexible circuit board 21 . In this embodiment, the light-emitting unit 22 is in the form of forward light emission (Top view), which can be: a light-emitting diode (LED) unit, an organic light-emitting diode (OLED) unit, a quantum dot light-emitting diode (QLED) units or electroluminescent (EL) units.

The light shielding element 30 has a first surface 31 and a second surface 32 opposite to each other, and the second surface 32 has a first recess 321 . In this embodiment, in order to cooperate with the shape of the support portion 12 so that the miniaturized backlight assembly 1 can achieve a surrounding lighting visual effect, the shading element 30 is made into a ring-shaped structure.

The light guide element 40 is made of a light guide material containing a light diffusing material, and has a third surface 41 and a fourth surface 42 opposite to each other. Wherein, the fourth surface 42 has a convex portion 421 and a second concave portion 422 adjacently arranged, and the convex portion 421 has a reflective slope 4211 on a side away from the second concave portion 422, and the surface of the convex portion 421 is provided with a plurality of gaps. Light guide ribs 4212 arranged in a grid. In this embodiment, in order to match the shape of the support portion 12 so that the miniaturized backlight assembly 1 can achieve a surrounding lighting effect, the light guide element 40 is made into a ring-shaped structure.

The housing 50 includes a side wall 52 and an opening 51 formed by the surrounding side wall 52, wherein the inner wall of the side wall 52 has a stopper 521, and the stopper 521 has a stop facing the opening. 51 extended bent ribs 5211.

Next, please refer to FIG. 4. FIG. 4 is a three-dimensional sectional view of the miniaturized backlight kit provided by this invention. When assembling the miniaturized backlight kit 1, colloid or double-sided tape can be arranged on the other surface of the flexible circuit board 21 opposite to the light-emitting unit 22, so as to stick the light-emitting module 20 on the surface of the supporting part 12 . Next, insert the light guide element 40 into the supporting portion 12 , and make the side of the light guide element 40 provided with the convex portion 421 lean against the cover plate 11 . In this embodiment, the light guide element 40 has a maximum thickness T and a maximum width W, and the maximum thickness T may be equal to or greater than 3.5 mm; the maximum width W may be equal to or greater than 8 mm.

Next, the light shielding element 30 is inserted into the supporting portion 12 and inserted into the second concave portion 422 of the light guiding element 40 . At this time, the light emitting unit 22 is located in the first recess 321 of the light shielding element 30 , and the open end of the first recess 321 faces the protrusion 421 of the light guide element 40 .

Finally, the cover plate 11 is installed in the opening 51 of the housing 50, and the same side of the light shielding element 30 and the light guide element 40 are made to abut against the stopper 521 on the inner wall surface of the side wall 52, and the side wall The portion 52 covers the third surface 41 of the light guide element 40 . On the other hand, the bent rib 5211 extending toward the opening 51 can be fixed on the surface of the cover 11 to combine the cover 10 and the casing 50 by means of locking, bonding or snapping.

Please refer to Figure 5, Figure 5 is a partially enlarged cross-sectional view of the miniaturized backlight kit provided by this creation. In FIG. 5 , the plurality of light guide ribs 4212 on the convex portion 421 abut against the support portion 12 (in this embodiment, the light guide ribs 4212 abut against the flexible circuit attached to the surface of the support portion 12 plate 21 ), a plurality of light channels P can be formed between the convex portion 421 and the supporting portion 12 . On the other hand, the reflective slope 4211 of the protrusion 421 is coated with a layer of white paint R, and the white paint R can be used to reflect light. In other possible implementations, the white paint coating R can also be replaced by a reflective sheet.

Please continue to refer to FIG. 5 , when the light emitting unit 22 disposed in the first recess 321 emits light L0, the shading element 30 will block the upwardly projected light L0, so that the upwardly projected light L0 cannot be directly transmitted to the light guide element 40 The third surface 41 of. The light L0 emitted by the light emitting unit 22 can be projected onto the convex portion 421 of the light guide element 40 through the open end of the first concave portion 321 directly or by reflection from the inner wall of the first concave portion 321 . Wherein, part of the light L0 can pass through the light channel P and be transmitted to the side edge of the cover plate 11 , so that the side edge of the cover plate 11 produces a visual effect of light.

On the other hand, other part of the light L0 can be transmitted to the reflective slope 4211 through the convex portion 421 and reflected by the white paint coating R disposed on the reflective slope 4211 to form a multi-angle light LR projected toward the third surface 41 . During the transmission process of the multi-angle light LR in the light guide element 40 , its brightness will gradually attenuate with the increase of the transmission distance and the decrease of the transmission medium.

Taking three multi-angle light rays LR1, LR2 and LR3 with different projection angles as an example, when the multi-angle light LR1 is transmitted to the third surface 41 corresponding to the top of the reflective slope 4211, due to the short transmission distance, the multi-angle light LR1 The brightness is high; when the multi-angle light LR2 is transmitted to the center of the third surface 41, the brightness of the multi-angle light LR2 will be lower than that of the multi-angle light LR1 due to the increase of the transmission distance; and when the multi-angle light LR3 is transmitted to the distance reflective slope On the third surface 41 at the farthest end of 4211, the brightness of the multi-angle light LR3 is lower than that of the multi-angle light LR2 due to the elongated transmission distance.

On the other hand, since the thickness of the light guide element 40 gradually decreases from the convex portion 421 toward the second concave portion 422, when the multi-angle light LR3 is transmitted to the area of the light guide element 40 corresponding to the second concave portion 422, the light can be transmitted The gradual reduction of the transmission medium, that is, the thickness of the light guide element 40 will also reduce the brightness of the multi-angle light LR3.

Although this embodiment only shows the multi-angle rays LR1 , LR2 and LR3 in three directions, in fact, the multi-angle rays LR cover all the rays reflected by the white paint coating R between the multi-angle rays LR1 to LR3 .

Finally, the multi-angle light LR will pass through the light-emitting surface, that is, the third surface 41, and then be transmitted to the side wall portion 52 of the housing 50, and a gradient brightness area B will be formed on the surface of the side wall portion 52, so that the side wall portion 52 produces a gradient glowing visual effect.

Compared with the conventional technology, the miniaturized backlight kit provided by this creation has a thinner design, and can produce a gradient luminous visual effect, which can effectively reduce the overall volume of the electronic device equipped with the miniaturized backlight kit. This is in line with the development trend of thinner and lighter electronic products. In addition, the light emitted by the light-emitting unit is transmitted to the light-emitting surface through the reflection of the light-guiding element, rather than being directly projected on the light-emitting surface, which can effectively reduce the problem of light spots in the gradient brightness area; therefore, this creation is actually a A creation with great industrial value.

This creation can be modified in various ways by a person who is familiar with the art, but it is not out of the scope of the attached patent application.

B, B': Gradient brightness area L, L0: light LR, LR1, LR2, LR3: multi-angle light P: optical channel R: white paint coating 1: Miniaturized backlight kit 10: cover body 11: Cover 12: Support part 20: Lighting module 21: Flexible printed circuit board 22: Lighting unit 30: shading element 31: first surface 32: second surface 321: the first recess 40, 92: light guide element 41: Third surface 42: The fourth surface 421: convex part 4211: reflective bevel 4212: Light guide ribs 422: second recess 50, 91: shell 51: Opening 52: side wall 521: stopper 5211: Bending convex rib 921: The first light guide part 922: The second light guide part 93: LED light source

Figure 1: It is a partial three-dimensional schematic diagram of a conventional backlight kit;

Figure 2: It is a three-dimensional schematic diagram of the miniaturized backlight kit provided for this creation;

Figure 3A: It is a three-dimensional exploded view of the miniaturized backlight kit provided by this creation;

Figure 3B: It is a three-dimensional exploded view from another perspective of the miniaturized backlight kit provided by this creation;

Figure 4: A three-dimensional cutaway view of the miniaturized backlight kit provided for this creation; and

Figure 5: It is a partially enlarged cross-sectional view of the miniaturized backlight kit provided by this creation.

B: Gradient brightness area

L0: light

LR, LR1, LR2, LR3: multi-angle light

P: optical channel

R: white paint coating

10: cover body

11: Cover

12: Support part

20: Lighting module

21: Flexible printed circuit board

22: Lighting unit

30: shading element

31: first surface

32: second surface

321: the first recess

40: Light guide element

41: Third surface

42: The fourth surface

421: convex part

4211: reflective bevel

4212: Light guide ribs

422: second recess

50: shell

51: Opening

52: side wall

Claims (10)

A miniaturized backlight kit comprising: a cover with a supporting portion; A light-shielding element, disposed on the support portion, has a first surface and a second surface opposite, and the second surface has a first recess; A light guide element, arranged on the supporting part, has a third surface and a fourth surface opposite to each other, the fourth surface has a second concave part and a convex part adjacently arranged, and the second concave part is used for The light-shielding element is accommodated so that the light-guiding element covers the first surface, and the open end of the first concave portion faces the convex portion, and the side of the convex portion away from the second concave portion has a light-reflecting slope; a housing, which can be combined with the cover, has a side wall portion covering the third surface; and At least one light-emitting unit is arranged in the first concave portion and can emit a light, the shading element blocks the light projected upwards, and transmits the light to the reflective slope of the convex portion, and the reflective slope reflects the light to forming a multi-angle light projected toward the third surface; Wherein, the brightness of the multi-angle light is gradually attenuated with the increase of the transmission distance and the decrease of the transmission medium during the transmission process of the light guide element, and the multi-angle light is transmitted from the third surface and transmitted to the side wall to form a gradual Layer brightness area. The miniaturized backlight kit as described in item 1 of the patent application, wherein the at least one light emitting unit is in the form of forward light emission. The miniaturized backlight kit as described in item 1 of the scope of the patent application, wherein the at least one light-emitting unit is: a light-emitting diode unit, an organic light-emitting diode unit, a quantum dot light-emitting diode unit or an electroluminescence unit. The miniaturized backlight kit as described in item 1 of the scope of the patent application, wherein the reflective slope has a white paint coating or a reflective sheet. In the miniaturized backlight kit described in item 1 of the scope of the patent application, the cover body includes a cover plate, and one side of the cover plate extends outward to form the support portion. In the miniaturized backlight kit described in item 5 of the scope of the patent application, an opening is formed around the side wall, and the cover plate is installed in the opening. In the miniaturized backlight kit as described in item 6 of the scope of the patent application, the inner wall surface of the side wall portion has a stopper, and the same side of the light-shielding element and the light-guiding element lean against the stopper portion. The miniaturized backlight kit as described in item 7 of the scope of the patent application, wherein the stopper has at least one bent rib, and the at least one bent rib extends toward the opening and is fixed on the surface of the cover plate . The miniaturized backlight kit as described in item 1 of the scope of the patent application, wherein the convex part extends downwards to form a plurality of light guide ribs, and these light guide ribs lean against the support part to connect the convex part and the support A plurality of optical channels are formed between the parts. The miniaturized backlight kit as described in item 1 of the scope of application, wherein the light guide element is made of a light guide material containing a light diffusing material.

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