Backlight kit

Abstract

The invention provides a backlight kit. The backlight suite comprises a base, a light diffusion cover plate, a light guide module, a light-emitting module and a semi-transparent black gradient layer light-transmitting piece. The light-emitting module, the light guide module and the semi-transparent black gradient layer light-transmitting piece are arranged in a containing space formed by the base and the light diffusion cover plate, the semi-transparent black gradient layer light-transmitting piece is arranged between the light guide module and the light diffusion cover plate, and a smooth and gradient light-emitting visual effect can be formed on the light diffusion cover plate through the semi-transparent black gradient layer light-transmitting piece.

Description

Technical Field

[0001] This invention relates to a light source structure, and more particularly to a backlight kit for use in electronic devices. Background Technology

[0002] LEDs are characterized by their small size, low power consumption, long lifespan, and rapid response. They are currently widely used as backlight sources for electronic devices such as traffic lights, advertising lights, automotive and motorcycle lighting, outdoor or household lighting devices, monitors, and computer peripherals.

[0003] In today's society, electronic devices have become essential daily necessities. With a wide variety of electronic devices available and increasing competition among similar products, manufacturers often incorporate LED light sources inside these devices to ensure their products remain distinctive. This creates a unique visual effect, attracting consumers' attention and enhancing usability, thereby increasing consumer appeal and purchase intentions.

[0004] Among the known backlighting technologies that can create gradient light effects, such as Figure 1 As shown, the backlight assembly 90 includes a base 91, a light guide element 92, a light-emitting module 93, and a cover 94. The base 91 has a recess 911; the light guide element 92 has a light diffusion structure area 921 and a recess 922 on one surface; the light-emitting module 93 includes a circuit board 931 and at least one light-emitting unit 932; the cover 94 has a light diffusion wall 941 that diffuses light, and the light diffusion wall 941 has at least one light guide block 9411 protruding inward on the side near the base 91. The light-emitting module 93 can be attached to one surface of the light guide element 92 via the circuit board 931, with the light-emitting unit 932 correspondingly positioned within the recess 922.

[0005] The light-emitting unit 932 emits light towards the light-guiding element 92 and transmits the light within the light-guiding element 92. The light is then diffused from the light-diffusing structure region 921 and the light-guiding block 9411 adjacent to the end of the light-guiding element 92 to the light-diffusing wall 941, creating a unique optical visual effect on the surface of the light-diffusing wall 941. In this prior art, the area of ​​the light-diffusing wall 941 corresponding to the light-emitting module 93 is defined as the first light-emitting region B1; and the second light-emitting region B2 corresponds to the light-diffusing structure region 921.

[0006] Please continue reading. Figures 2A to 2B , Figure 2A and Figure 2B This is a schematic diagram illustrating the gradient light effect of a known backlight kit. Figure 2A In the middle, when the light-emitting module 93 (such as Figure 1When not activated, the first light-emitting area B1 and the second light-emitting area B2 on the light diffusion wall 941 will form a clear black-and-white discontinuity. When the light-emitting module 93 is activated, in addition to the clear black-and-white discontinuity, the first light-emitting area B1 and the second light-emitting area B2 will also have a clear visually perceptible dot pattern in the light diffusion structure area 921, which gradually becomes denser, and the edge bright lines formed by the light diffused by the light guide block 9411. This makes it impossible for the backlight kit 90 to form a smooth gradient visual effect on the light diffusion wall 941.

[0007] Therefore, how to make the backlight kit produce a smooth and gradual light emission visual effect is the technical problem that this invention aims to solve. Summary of the Invention

[0008] The main objective of this invention is to provide a backlight kit that produces a smooth and gradient luminous visual effect.

[0009] To achieve the aforementioned objectives, the present invention provides a backlight kit, comprising: a base having a recess; a light diffusion cover plate, which is combined with the base and covers the recess; a light guide module disposed in the recess, wherein the light guide module has a light diffusion structure region on the side facing the light diffusion cover plate, the light diffusion structure region having light diffusion microstructures arranged in a gradually increasing density pattern; a light-emitting module disposed on the other side of the light guide module away from the light diffusion structure region, for projecting light onto the light guide element and allowing it to pass through the light diffusion structure region; and a semi-transparent black gradient light-transmitting element disposed between the light guide module and the light diffusion cover plate;

[0010] The semi-transparent black gradient light-transmitting component includes a first opaque black ink layer, a rapidly gradient light-transmitting black ink layer, and a gently gradient light-transmitting black ink layer. The rapidly gradient light-transmitting black ink layer is located between the first opaque black ink layer and the gently gradient light-transmitting black ink layer, and the width of the rapidly gradient light-transmitting black ink layer is smaller than the width of the gently gradient light-transmitting black ink layer. The first opaque black ink layer corresponds to the light-emitting module, and the rapidly gradient light-transmitting black ink layer and the gently gradient light-transmitting black ink layer correspond to the light diffusion structure area. The light transmitted from the light diffusion structure area penetrates the rapidly gradient light-transmitting black ink layer and the gently gradient light-transmitting black ink layer to form a smooth and gradient light-emitting visual effect on the light diffusion cover plate.

[0011] In the preferred embodiment described above, the transmittance of the rapidly gradient transparent black ink layer gradually changes from 0% to 50% as it moves from the opaque black ink layer to the gently gradient transparent black ink layer.

[0012] In the preferred embodiment described above, the width of the rapidly gradient translucent black ink layer is between 3 mm and 5 mm.

[0013] In the preferred embodiment described above, the transmittance of the gently gradient translucent black ink layer gradually changes from 50% to 100% from the side of the abruptly gradient translucent black ink layer toward the side away from the abruptly gradient translucent black ink layer.

[0014] In the preferred embodiment described above, the width of the gently gradation translucent black ink layer is at least greater than 10 mm.

[0015] In the preferred embodiment described above, the semi-transparent black gradient light-transmitting element further includes a second opaque black ink layer, the second opaque black ink layer being adjacent to the side of the gently gradient light-transmitting black ink layer away from the abruptly gradient light-transmitting black ink layer.

[0016] In the preferred embodiment described above, the width of the second opaque black ink layer is at least greater than 1 mm.

[0017] In the preferred embodiment described above, the thickness of the semi-transparent black gradient light-transmitting element is less than 0.2 mm.

[0018] In the preferred embodiment described above, the semi-transparent black gradient light-transmitting component is manufactured by digital inkjet printing or offset printing.

[0019] In the preferred embodiment described above, the semi-transparent black gradient light-transmitting element is made of plastic or glass.

[0020] In the preferred embodiment described above, the light-emitting module includes a circuit board, a light-shielding sheet, and at least one light-emitting unit. The light-emitting unit is disposed on the circuit board and used to project light onto a light guide element. The light-shielding sheet is disposed on the other surface of the circuit board opposite to the light-emitting unit.

[0021] In the preferred embodiment described above, the light-emitting unit may be a light-emitting diode unit, an organic light-emitting diode unit, a quantum dot light-emitting diode unit, or an electroluminescent unit.

[0022] In the preferred embodiment described above, the light guide module has a light guide plate, and the light diffusion structure area is disposed on the light guide plate.

[0023] In the preferred embodiment described above, a reflective film is provided on the other surface of the light guide plate opposite to the light diffusion structure region.

[0024] The beneficial effect of this invention is that the backlight kit can produce different blocking effects through semi-transparent black gradient light-transmitting elements with different transmittance, so that adjacent light-emitting areas will not form obvious black-and-white discontinuities whether the light-emitting module is off or on. In addition, when the light-emitting module is on, the light-emitting area corresponding to the light diffusion structure area of ​​the light guide module can be blocked by the semi-transparent black gradient light-transmitting elements, so that the user cannot visually perceive the dot structure of the light diffusion structure area or its uneven formation, thus enabling the backlight kit to form a smooth and gradient visual effect on the surface. Attached Figure Description

[0025] Figure 1 This is a cross-sectional schematic diagram of a known backlight assembly;

[0026] Figures 2A to 2B This is a schematic diagram of the gradient light effect of a known backlight kit;

[0027] Figure 3A This is an exploded perspective view of the backlight kit of the present invention;

[0028] Figure 3B This is a cross-sectional view of the backlight kit of the present invention;

[0029] Figure 4 A top view of the semi-transparent black gradient light-transmitting component provided by the present invention; and Figures 5A to 5B This is a schematic diagram of the gradient light effect of the backlight kit of the present invention.

[0030] The attached figures are labeled as follows:

[0031] A1, B1 First Light-Emitting Zone

[0032] A2, B2 Second Light-Emitting Zone

[0033] 10, 90 Backlight Kit

[0034] 11, 91 Base

[0035] 111, 911 concave part

[0036] 12 Light Guide Modules

[0037] 121 Light Guide Plate

[0038] 1211, 921 light diffusion structure regions

[0039] 122 Reflective Film

[0040] 123, 922 concave holes

[0041] 13, 93 Light-emitting modules

[0042] 131, 931 circuit boards

[0043] 132, 932 light-emitting units

[0044] 133 Light-blocking sheet

[0045] 14 Light diffusion cover plate

[0046] 15 Semi-transparent black gradient light-transmitting parts

[0047] 151 First opaque black ink layer

[0048] 152 Abruptly Gradual Translucent Black Ink Layer

[0049] 153 Gentle gradient translucent black ink layer

[0050] 154 Second opaque black ink layer

[0051] 92 Light guide element

[0052] 94. Cover

[0053] 941 Light Diffuser Wall

[0054] 9411 light guide block Detailed Implementation

[0055] The advantages and features of the present invention, as well as the methods of achieving them, will be more readily understood through a more detailed description with reference to exemplary embodiments and accompanying drawings. However, the invention may be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments provided will enable those skilled in the art to more thoroughly and completely convey the scope of the invention.

[0056] First, please refer to Figure 3A and Figure 3B . Figure 3A This is an exploded perspective view of the backlight kit of the present invention; Figure 3B This is a cross-sectional view of the backlight kit of the present invention. The backlight kit 10 provided by the present invention can be disposed on the housing of the peripheral connection port of an electronic device, and can prompt the user through the formed gradient light emission visual effect, so that the user can know the location or usage status of the peripheral connection port. The backlight kit 10 includes: a base 11, a light guide module 12, a light emission module 13, a light diffusion cover plate 14, and a semi-transparent black gradient light-transmitting element 15.

[0057] The base 11 has a recess 111; the light guide module 12 includes a light guide plate 121, a reflective film 122 and a recess 123, wherein the light guide plate 121 has a light diffusion structure region 1211 on a surface away from the recess 123. In this embodiment, the light diffusion structure region 1211 also has a light diffusion microstructure (not shown in the figure) arranged from sparse to dense.

[0058] The light-emitting module 13 includes: a circuit board 131, one or more light-emitting units 132, and a light-shielding sheet 133, wherein the light-emitting units 132 are disposed on the circuit board 131; and the light-shielding sheet 133 is disposed on the other surface of the circuit board 131 opposite to the light-emitting units 132. The light-emitting unit 132 may be: a light-emitting diode (LED) unit, an organic light-emitting diode (OLED) unit, a quantum dot light-emitting diode (QLED) unit, or an electroluminescent (EL) unit.

[0059] Please continue reading. Figure 3B The light guide module 12 is disposed in the recess 111 of the base 11, and the light-emitting module 13 is disposed on the other side of the light guide module 12 away from the light diffusion structure region 1211. In this embodiment, the light-emitting module 13 can be attached to the light guide plate 121 via a circuit board 131, and the light-emitting unit 132 can be correspondingly disposed in the recess 123 of the light guide module 12. In other possible implementations, the size of the light guide plate 121 of the light guide module 12 can be designed to be smaller than the recess 111 of the base 11, and a clearance space for accommodating the light-emitting unit 132 can be formed on one side of the recess 111, without the need to provide a recess 123 in the light guide module 12.

[0060] The semi-transparent black gradient light-transmitting element 15 is disposed on the light-emitting module 13 and located between the light-guiding module 12 and the light-diffusing cover plate 14. The light-diffusing cover plate 14 can be combined with the base 11 and cover the recess 111. In this embodiment, the light-diffusing structure area 1211 of the light-guiding module 12 faces the semi-transparent black gradient light-transmitting element 15, that is, it also faces the light-diffusing cover plate 14. Based on the light-diffusing structure area 1211 of the light-emitting module 13 and the light-guiding module 12, a first light-emitting area A1 and a second light-emitting area A2 can be defined on the surface of the light-diffusing cover plate 14.

[0061] Please see Figure 4 , Figure 4This is a top view of the semi-transparent black gradient light-transmitting component 15 provided by the present invention. The semi-transparent black gradient light-transmitting component 15 includes, from top to bottom: a first opaque black ink layer 151, a rapidly gradient light-transmitting black ink layer 152, a gently gradient light-transmitting black ink layer 153, and a second opaque black ink layer 154. The rapidly gradient light-transmitting black ink layer 152 is located between the first opaque black ink layer 151 and the gently gradient light-transmitting black ink layer 153, and the width of the rapidly gradient light-transmitting black ink layer 152 is smaller than the width of the gently gradient light-transmitting black ink layer 153; the second opaque black ink layer 154 is adjacent to the side of the gently gradient light-transmitting black ink layer 153 away from the rapidly gradient light-transmitting black ink layer 152. The semi-transparent black gradient light-transmitting element 15 is made by digital spraying or offset printing. Its material can be plastic, such as PET, PMMA or PC, or glass, and its overall thickness is less than 0.2mm.

[0062] The first opaque black ink layer 151 covers and corresponds to the light-emitting module 13, namely the first light-emitting area A1 (e.g., Figure 3B (as shown); the rapidly gradient translucent black ink layer 152 and the gently gradient translucent black ink layer 153 correspond to the light diffusion structure region 1211, i.e. the second light-emitting region A2, and the rapidly gradient translucent black ink layer 152 is located at the junction of the first light-emitting region A1 and the second light-emitting region A2.

[0063] The transmittance of both the first opaque black ink layer 151 and the second opaque black ink layer 154 is 0%; the width of the first opaque black ink layer 151 is adjusted according to the size of the light-emitting module 13 and has no fixed width range; the width of the second opaque black ink layer is at least greater than 1 mm. Furthermore, in some possible embodiments, if the second light-emitting area A2 has no light guide block at the end furthest from the first light-emitting area A1 (e.g....), Figure 1 In the design of known technologies or light diffusion gaps, the semi-transparent black gradient light-transmitting element 15 may also not have a second opaque black ink layer 154, and is not limited to the embodiments proposed in this invention.

[0064] The transmittance of the rapidly gradient translucent black ink layer 152 gradually changes from 0% to 50% from the opaque black ink layer 151 toward the gently gradient translucent black ink layer 153. In this embodiment, the width of the rapidly gradient translucent black ink layer 152 is between 3mm and 5mm.

[0065] The transmittance of the gently gradation translucent black ink layer 153 gradually changes from 50% to 100% from the abruptly gradation translucent black ink layer 152 toward the side away from the abruptly gradation translucent black ink layer 152. In this embodiment, the width of the gently gradation translucent black ink layer 153 is at least greater than 10 mm.

[0066] Please refer to the following: Figure 3B , Figure 4 , Figures 5A to 5B . Figures 5A to 5B This is a schematic diagram illustrating the gradient light effect of the backlight kit of the present invention. Please refer to [link / reference]. Figure 5A When the light-emitting module 13 is not activated, compared to Figure 2A (i.e., known technology) the backlight kit 10 provided by this invention can initially mitigate the light-emitting areas A1 and A2 (e.g., through a rapidly gradient transparent black ink layer 152) by using a layer of black ink 152. Figure 3B and Figure 5A The obvious black and white contrast is formed between the two (as shown), and then a smooth gradient visual effect is formed on the light diffusion cover plate 14 by the subsequent gentle gradient light-transmitting black ink layer 153.

[0067] Please refer to the following: Figure 3B and Figure 5B When the light-emitting module 13 is activated, the light-emitting unit 132 emits light towards the light-guiding element 12 and transmits the light within the light-guiding element 12. The reflective film 122 further enhances the light transmission efficiency. Subsequently, the light can pass through the light diffusion structure region 1211 and through the semi-transparent black gradient light-transmitting element 15 to the light diffusion cover plate 14. In this embodiment, if some of the light transmitted by the light-guiding element 12 passes through the first light-emitting area A1 earlier, the light-shielding plate 133 of the light-emitting module 13 and the first opaque black ink layer 151 of the semi-transparent black gradient light-transmitting element 15 can be used to block the leaked light, so that the first light-emitting area A1 remains completely dark. In some possible implementations, the leaked light can also be completely blocked by the first opaque black ink layer 151 without the need to additionally provide a light-shielding plate 133 on the light-emitting module 13.

[0068] Next, the light emitted from the light diffusion structure area 1211 can pass through the abruptly gradient translucent black ink layer 152 and the gently gradient translucent black ink layer 153 of the semi-transparent black gradient light-transmitting element 15, thus forming a smooth and gradient luminous visual effect on the light diffusion cover plate 14. It should be further explained that, in addition to making the gradient luminous visual effect smoother, the abruptly gradient translucent black ink layer 152 and the gently gradient translucent black ink layer 153 can also further block the light diffusion structure area 1211, so that the second luminous area A2 corresponding to the light diffusion structure area 1211 is blocked by the semi-transparent black gradient light-transmitting element 15, so that the user cannot visually perceive the dot structure of the light diffusion structure area 1211 or the noise it forms, thereby further improving the visual comfort of the gradient luminous visual effect.

[0069] Depend on Figure 5A , Figure 5B It can also be clearly seen that the second opaque black ink layer 154 (as shown) Figure 4(As shown) can also completely cover the edge bright lines at the bottom of the gradient effect on the surface. Although the present invention only proposes an embodiment in which the semi-transparent black gradient light-transmitting element 15 is disposed between the light guide module 12 and the light diffusion cover plate 14, in actual applications, the semi-transparent black gradient light-transmitting element 15 can also be directly bonded to the inner surface of the light diffusion cover plate 14, or the ink layers of each segment of the semi-transparent black gradient light-transmitting element 15 can be directly printed and formed on the inner surface of the light diffusion cover plate 14, and is not limited to the embodiment proposed in the present invention.

[0070] Compared to known technologies, the backlight kit provided by this invention can produce different blocking effects through semi-transparent black gradient light-transmitting elements with different transmittance, so that adjacent light-emitting areas will not form obvious black-and-white discontinuities whether the light-emitting module is off or on. In addition, when the light-emitting module is on, the light-emitting area corresponding to the light diffusion structure area of ​​the light guide module can be blocked by the semi-transparent black gradient light-transmitting elements, so that the user cannot visually perceive the dot structure of the light diffusion structure area or its uneven formation, thus allowing the backlight kit to form a smooth and gradient visual effect on the surface; therefore, this invention is a creation with great industrial value.

[0071] This invention may be modified in various ways by those skilled in the art, but all such modifications shall not depart from the protection sought by the appended claims.

Claims

1. A backlight kit, comprising: A base having a recess; A light-diffusing cover plate is integrated with the base and covers the recess; A light guide module is disposed in the recess. The light guide module has a light diffusion structure area on the side facing the light diffusion cover plate. The light diffusion structure area has light diffusion microstructures arranged from sparse to dense. A light-emitting module is disposed on the side of the light guide module away from the light diffusion structure area, for projecting light onto the light guide element and allowing it to pass through the light diffusion structure area; and A semi-transparent black gradient light-transmitting component is disposed between the light guide module and the light diffusion cover plate; in, The semi-transparent black gradient light-transmitting component includes a first opaque black ink layer, a rapidly gradient light-transmitting black ink layer, and a gently gradient light-transmitting black ink layer. The rapidly gradient light-transmitting black ink layer is located between the first opaque black ink layer and the gently gradient light-transmitting black ink layer, and the width of the rapidly gradient light-transmitting black ink layer is smaller than the width of the gently gradient light-transmitting black ink layer. The first opaque black ink layer corresponds to the light-emitting module, and the rapidly gradient light-transmitting black ink layer and the gently gradient light-transmitting black ink layer correspond to the light-diffusing structure area. The light transmitted from the light-diffusing structure area penetrates the rapidly gradient light-transmitting black ink layer and the gently gradient light-transmitting black ink layer to form a smooth and gradient light-emitting visual effect on the light-diffusing cover plate.

2. The backlight assembly as claimed in claim 1, wherein the transmittance of the abruptly gradient translucent black ink layer gradually changes from 0% to 50% from the opaque black ink layer toward the gently gradient translucent black ink layer.

3. The backlight kit as claimed in claim 2, wherein the width of the rapidly gradient translucent black ink layer is between 3 mm and 5 mm.

4. The backlight assembly as claimed in claim 1, wherein the transmittance of the gently gradation translucent black ink layer gradually changes from 50% to 100% from the side of the abruptly gradation translucent black ink layer toward the side away from the abruptly gradation translucent black ink layer.

5. The backlight kit of claim 4, wherein the width of the gently gradation translucent black ink layer is at least greater than 10 mm.

6. The backlight assembly of claim 1, wherein the semi-transparent black gradient light-transmitting element further includes a second opaque black ink layer, the second opaque black ink layer being adjacent to the side of the gently gradient light-transmitting black ink layer away from the abruptly gradient light-transmitting black ink layer.

7. The backlight kit of claim 6, wherein the width of the second opaque black ink layer is at least greater than 1 mm.

8. The backlight kit as claimed in claim 1, wherein the thickness of the semi-transparent black gradient light-transmitting element is less than 0.2 mm.

9. The backlight kit as claimed in claim 1, wherein the semi-transparent black gradient light-transmitting element is manufactured by digital spraying or offset printing.

10. The backlight kit as claimed in claim 9, wherein the semi-transparent black gradient light-transmitting element is made of plastic or glass.

11. The backlight assembly of claim 1, wherein the light-emitting module includes a circuit board, a light-shielding sheet and at least one light-emitting unit, the at least one light-emitting unit being disposed on the circuit board and used to project light onto the light guide element, and the light-shielding sheet being disposed on another surface of the circuit board opposite to the at least one light-emitting unit.

12. The backlight assembly of claim 11, wherein the at least one light-emitting unit may be: a light-emitting diode unit, an organic light-emitting diode unit, a quantum dot light-emitting diode unit, or an electroluminescent unit.

13. The backlight assembly as claimed in claim 1, wherein the light guide module has a light guide plate, and the light diffusion structure region is disposed on the light guide plate.

14. The backlight assembly of claim 13, wherein the light guide plate has a reflective film disposed on another surface opposite to the light diffusion structure region.

Images