TWM508108U - Light guide structure of keyboard backlight module - Google Patents

Description

Light guide structure of keyboard backlight module

The present invention provides a light guiding structure of a keyboard backlight module, in particular, a light guiding structure capable of improving the high light refraction efficiency of a backlight device, and is provided with a plurality of high refractive index scattering points on the surface of the light guiding layer of the backlight device. A predetermined proportion of high refractive index particles are added to the ink to improve the brightness refraction and increase the brightness of the keyboard backlight device.

According to the advancement of the electronic technology era, many jobs, general paperwork or images, pictures, etc. will be processed through computers, and in addition to various operations, the computer can also provide a connection to the Internet for searching. , shopping, video or download electronic materials, audio and video materials, etc., can also provide a variety of computer applications such as games, and peripheral equipment necessary for computer operation, such as keyboard, mouse, etc., for the computer to execute various programs, carry out The peripheral tools necessary for various operations, so the basic equipment of the computer, in addition to the computer host and display screen, the keyboard and mouse also become an indispensable tool, and most of the keyboards currently used by computers are available. Through the multiple buttons on the keyboard, various electronic signals such as control signals, words or numbers are input into the host computer. The type of the keyboard is also a common keyboard frame with many buttons for pressing, which is a basic computer keyboard mode.

Therefore, in order to improve the current type of the keyboard, the manufacturer also installs a backlight module inside the keyboard to project the light source to the periphery of each key of the keyboard through the backlight module, so that the light is made by the backlight. The gap between the adjacent keyboards leaks out, which increases the application of the keyboard. It also provides the keyboard with bright display and easy identification. For the backlight module used in the keyboard with current illumination function, please refer to the sixth figure. The figure is a side view of a conventional keyboard backlight mode. In the current keyboard, a plurality of reflection points A11 are respectively arranged at the bottom of the light-conducting surface A1 of the backlight module A, and a backlight module A11 is provided. After the illuminant A3 inside the group A projects the ray S into the light guiding surface A1, the ray S will be refracted by the light guiding surface A1 to the reflection point A11, and the refracted ray S1 reflected by the ray S via the reflection point A11 is directed toward the light guiding surface A1. In the reflection, the light S is transmitted through the light guiding surface A1 and then projected outside by the light shielding surface A4. However, when the light S is reflected from the reflection point A11 toward the light guiding surface A1, the partially refracted rays S2, S3, and S4 are guided. The top surface of the surface A1 is re-reflected, so that the brightness of the reflected light S1 projected toward the light-shielding surface A4 is weakened, and the partially refracted light rays S2, S3, and S4 are inside the light-guiding surface A1, so that the bright light is absorbed by the light-guiding surface A1, and brightness is also generated. Attenuation, loss of light energy The problem is that the brightness when the reflected light ray S1 is projected toward the light-shielding surface A4 is insufficient; and when the light source is reflected upward by the reflection point A11 at the bottom of the light-guiding surface A1, the reflection path is long, the light is easily scattered toward the periphery, or is guided by the light-guiding surface A1. Absorbing and attenuating, the reflected light S1 is not easy to concentrate, and the brightness of the light S is insufficient due to the loss, which causes the backlight display effect of the backlight module A to be deteriorated, which affects the poor display function of the keyboard, and needs to be improved.

Therefore, how to solve the light reflected from the reflection point of the keyboard backlight module It is easy to produce light attenuation, lack of brightness and problems, and the path of light projected into the light guiding surface and reflected by the reflecting point is longer, which also causes the trouble that the brightness of the light is absorbed and attenuated by the light guiding surface, that is, to engage in this The direction that the industry is eager to improve.

Therefore, the creators have collected relevant information in view of the above problems and shortcomings. Through multi-party evaluation and consideration, and through years of experience in the industry, through continuous trial and modification, the ink refraction layer with high refractive index particles is designed over the light guiding layer of the backlight device. A new patented patenter that directs the illumination of the illumination device toward the light-shielding layer to maintain the light-guiding structure of the keyboard backlight module in which the brightness of the backlight device is not easily attenuated.

The main purpose of this creation is that the light guiding structure is laminated on the backlight device. Above the reflective layer, the light guiding layer and the light shielding layer, a plurality of buttons are arranged, and a circuit board of the light emitting device is disposed at the reflective layer of the backlight device, and the circuit board is provided with a plurality of light emitting elements, and the light can be projected to the backlight device. And a plurality of high refractive index scattering points are disposed above the light guiding layer of the backlight device, so that the high refractive index scattering points are respectively located below the respective button positions, and each high refractive index scattering point is added to the ink through a predetermined ratio. The high refractive index particles form a high refractive index effect on the bright light between the light guiding layers, thereby achieving the purpose of improving the bright refractive index of the backlight device.

The secondary purpose of this creation is in the complex high refractive index scattering point, A color-transparent material ink (such as yellow, red, blue or green or other colors) is added for the backlight device to transmit different color changes through the function of refraction or scattering of each high-refractive-index scattering point. Bright high refractive index effect, and can provide different colors of reflective brightness when the ink reflects light.

Another object of the present invention is that the plurality of high refractive index scattering points include a predetermined proportion of high refractive index particles added to the ink and the ink, and the plurality of high refractive index scattering points can be processed by printing, evaporation, adhesion or embedding. The method is formed on the light guiding layer of the backlight device and located below the respective buttons; and the high refractive index particles in the proportion of 0.1-50% can be added to the ink, and the high refractive index particles can be oxides [ Such as cerium oxide (SiO ₂ ), alumina (Al ₂ O ₃ ) or titanium dioxide (TiO ₂ ), etc., nitrides (such as aluminum nitride (AlN), etc.) or diamonds, etc. The particle diameter of the high refractive index particle may be 0.1 to 20 μm, and the high refractive index particle may be added through the ink to increase the surface roughening pattern of each high refractive index scattering point and have higher light. Scattering effect.

1‧‧‧Backlight

11‧‧‧reflective layer

12‧‧‧Light guide layer

13‧‧‧Lighting layer

14‧‧‧ button

2‧‧‧Lighting device

21‧‧‧ boards

22‧‧‧Lighting elements

3‧‧‧High refractive index scattering point

31‧‧‧Ink

32‧‧‧High refractive index particles

A‧‧‧Backlight module

A1‧‧‧Light guide

A11‧‧‧reflection point

A2‧‧‧reflective surface

A3‧‧‧Lights

A4‧‧‧ shading surface

S‧‧‧Light

S1‧‧‧reflecting light

S2‧‧‧ Refracted light

S3‧‧‧ Refracted light

S4‧‧‧ Refracted light

The first picture is a three-dimensional exploded view of the creation.

The second figure is a side cross-sectional view of the creation.

The third drawing is a side view of the preferred embodiment of the creation.

The fourth figure is a side view of another embodiment of the creation.

The fifth drawing is a side view of still another embodiment of the creation.

The sixth diagram is a side view of a conventional keyboard backlight mode.

In order to achieve the above objectives and effects, the technical means used in the creation, its construction, the method of implementation, etc., are described in detail in the preferred embodiment of the present invention, and the features and functions are as follows.

Please refer to the first, second and third figures, which are respectively an exploded perspective view of the creation, a side cross-sectional view, and a side view of a preferred embodiment. As can be clearly seen from the figure, the keyboard backlight module of the creation is clearly shown. The light guiding structure of the group includes a backlight device 1, a light emitting device 2, and a plurality of high refractive index scattering dots 3, wherein the backlight device 1 includes a reflective layer 11 and a light guiding layer 12 in a laminated manner. The light shielding layer 13 is provided with a plurality of buttons 14 above the light shielding layer 13.

The light-emitting device 2 includes a circuit board 21 having a predetermined circuit layout, and the circuit board 21 is provided with a plurality of light-emitting elements 22 (which may be light-emitting diodes (LEDs)).

The plurality of high refractive index scattering dots 3 include an ink 31 and high refractive index particles 32 added to a predetermined ratio in the ink 31.

When the above-mentioned components are assembled, the circuit board 21 of the light-emitting device 2 is assembled by using the reflective layer 11 of the backlight device 1, and the plurality of light-emitting elements 22 on the circuit board 21 are directed toward the light-guiding layer 12 and the light-shielding layer 13, and then A plurality of high refractive index scattering dots 3 are disposed on the surface of the light guiding layer 12 of the adjacent light shielding layer 13, so that the light of the light emitting element 22 reflected by the reflective layer 11 can be refracted through the plurality of high refractive index scattering dots 3 toward the light shielding layer 13. In order to improve the brightness and heat dissipation effect of the light refraction, the light guide structure of the keyboard backlight module of the present invention is formed by the backlight device 1, the light-emitting device 2, and the plurality of high-refractive-index scattering points 3.

The plurality of high-refractive-index scattering dots 3 include ink 31 and ink 31 added with a predetermined proportion of high-refractive-index particles 32, which may be transparent inks having a light-transmitting effect, which can be printed, evaporated, adhered or In a processing manner such as embedding, the plurality of high refractive index scattering dots 3 are combined and positioned on the surface of the light guiding layer 12 of the backlight device 1, and the high refractive index particles 32 added in the ink 31 may be oxides (which may be cerium oxide) a high refractive index object such as (SiO ₂ ), alumina (Al ₂ O ₃ ) or titania (TiO ₂ ), nitride (which may be aluminum nitride (AlN) or the like) or diamonds, and may be in the ink 31 0.1 to 50% of a predetermined proportion of the high refractive index particles 32 are added thereto, and the particle diameter of the high refractive index particles 32 may be a size type particle shape of 0.1 to 20 μm, and the visible plurality of high refractive index scattering points 3 are located at the light guide. The position of the surface of the layer 12 is different, and the high refractive index particles 3 2 of different particle sizes are added, thereby achieving the effect of different light refraction, and having a good light source scattering function.

And the plurality of high refractive index scattering dots 3 are processed by printing or vapor deposition. The positioning is combined with the light guiding layer 12 of the backlight device 1 when the light-emitting elements 22 on the circuit board 21 of the light-emitting device 2 are facing different positions of the backlight device 1 (such as the center, the left, the right, or the bottom). The light source is projected such that the light source is projected through the light guiding layer 12 to the plurality of high refractive index scattering points 3. The ink 31 using the plurality of high refractive index scattering points 3 has a good light refraction or reflection function, and the light source can be outwardly refracted or reflected. Therefore, it is not reflected in the opposite direction, and most of the light source light can be refracted or reflected to the light shielding layer 13 via the plurality of high refractive index scattering points 3 to reduce the light source from being reflected back to the light guiding layer 12 or the reflective layer in the opposite direction. In the case of 11, the light source brightness is absorbed by the light guiding layer 12 and the reflective layer 11 when the light source is reflected back to the light guiding layer 12 and the reflective layer 11, and the optical loss is generated, and the reflection and refraction of the light source can be shortened. Path travel, avoiding the lack of light-transmission loss caused by the reflection of the light source in the opposite direction, reducing the degree of light loss caused by the projection process of the light source, and adding a high refractive index to the complex high-refractive-index scattering point 3 Sub-32, which has the effect of scattering light source with high refractive index, increases the refraction and reflection performance of the brightness of the light source of the complex high-refractive-index scattering point 3, and can refract and reflect the light source received by the plurality of high-refractive-index scattering points 3 toward the outside. , scattering, can increase the brightness of the scattered light source, forming high-brightness refraction, scattering effect.

Please refer to the first, second, third, fourth and fifth figures, which are respectively 3D exploded view, side cross-sectional view, side view of a preferred embodiment, side view of another embodiment, and side view of still another embodiment, as can be clearly seen from the figure, the keyboard backlight module of the present invention is The light guiding structure can add a light-transmitting material ink with a light-transmitting effect and a color in the ink 31 of the plurality of high-refractive-index scattering points 3, and the light-transmitting material ink with color can be yellow, red, blue a toner of color or green or other color, whereby the ink 31 can refract, reflect or scatter a bright light effect having various colors, and then mix the high refractive index particles 32 added in the ink 31 to make a plurality of high refractive index scattering points. 3 refracting, reflecting or scattering the reflected colored light outward to achieve the function of improving the refraction, reflection or scattering of the light source; and matching the position of the plurality of buttons 14 assembled above the light shielding layer 13 on the backlight device 1, or The plurality of buttons 14 in a certain area have special application functions (such as when applied to a computer game, a plurality of buttons 14 in a partial area have functions of controlling a moving direction, jumping or transmitting, etc.), and are guided under a plurality of buttons 14 in a specific function area. The light layer 12 can be provided with a plurality of high-refractive-index points 3 of different colors on the surface, so that the plurality of buttons 14 in a specific region can produce different colors of light display effects, and can achieve the indication function of different colors of light, which is easy to recognize and The function of the area and position of the plurality of keys 14 having special functions.

Furthermore, the present invention is provided with a plurality of highs on the top of the light guiding layer 12 of the backlight device 1. The refractive index scatters the point 3, and a plurality of high refractive index scattering points 3 are further disposed at the bottom of the light guiding layer 12, and the plurality of high refractive index scattering points 3 are respectively combined and positioned on the top and bottom surfaces of the light guiding layer 12 of the backlight device 1, When the light-emitting elements 22 of the light-emitting device 2 project the light source onto the light-guiding layer 12, the light source is projected upward to the high-refractive-index scattering points 3 to transmit the high-refractive-index scattering points. 3 projecting outward, the light-emitting element 22 partially projects the light source to the high-refractive-index point 3 at the bottom of the light-guiding layer 12, and reflects the light source upward through the high-refractive-index points 3 at the bottom, and then The high refractive index scattering point 3 is outwardly scattered to increase the efficiency of refraction, reflection or scattering of the light source of each high refractive index scattering point 3, and is projected to a light source located at each of the high refractive index scattering points 3 at the bottom of the light guiding layer 12, If it is not reflected upward, the light source may be projected onto the reflective layer 11 and then reflected upward by the reflective layer 11 to the light guiding layer 12 And the light shielding layer 13, the light source is collectively projected under the plurality of buttons 14 to have a good bright light display effect on the bottom periphery of each button 14.

Therefore, the above description is only a preferred embodiment of the present creation, and is not a Limiting the patent scope of the present invention, the light-guiding structure of the backlight module of the present invention is assembled on the reflective layer 11 of the backlight device 1 to assemble the light-emitting device 2, and the surface adjacent to the light-shielding layer 13 above the light-guiding layer 12 is processed through the processing method. The plurality of high refractive index scattering points 3 are combined and positioned, and the plurality of high refractive index scattering points 3 are added to the ink 31 to add a predetermined proportion of the high refractive index particles 32, and the yoke can reach the light emitting device 2 through the plurality of high refractive index scattering points 3. The light-emitting element 22 projects bright light to the light guiding layer 12, and is outwardly refracted, reflected or scattered through the plurality of high refractive index scattering dots 3, and the high refractive index particles 32 added by the plurality of high refractive index scattering dots 3 have good The light scattering effect and the phenomenon of reducing the back reflection of the light source can reduce the absorption of the light source by the light guiding layer 12 due to the reverse reflection, and reduce the optical loss, and can add the colored ink by using the plurality of high refractive index scattering points 3. , the effect of scattering different color brightness can be carried out, so the structure and device that can achieve the aforementioned effects should be covered by the creation, and such simple modification and equivalent structural change should be treated with the same package. Within the scope of the present writing, the engagement to Chen.

Therefore, this creation is mainly for the light guide structure of the backlight module. A plurality of high refractive index scattering points are disposed adjacent to the surface of the light guiding layer adjacent to the light layer by the backlight device, and a predetermined proportion of the high refractive index particles are added into the ink of the plurality of high refractive index scattering points to project the light emitting element of the light emitting device into the light emitting device After the light source inside the light guiding layer is reflected to the plurality of high refractive index scattering points, the high refractive index particles of the plurality of high refractive index scattering points can be used to refract, reflect or scatter the light source toward the light shielding layer as the main protection focus. The complex high-refractive-index scattering point enhances the brightness effect of the refraction and scattering of the light source, and refracts or reflects most of the light source to the outside, thereby shortening the light source and then The reverse projection path only makes the backlight device have the advantage of reducing optical loss, and can add colored ink to the plurality of high refractive index scattering points, and can be used for a specific position area of the backlight device, capable of projecting different colors of light, and being easy to The purpose of the special function button is to be determined, but the above is only the preferred embodiment of the present invention, and thus does not limit the scope of the patent of the creation, so the simple modification and the like of using the creation specification and the graphic content are The structural changes shall be included in the scope of the patent of this creation and shall be combined with Chen Ming.

In summary, the light guiding structure of the above backlight module is actually implemented. In the implementation, in order to achieve its efficacy and purpose, the creation is a practical and excellent research and development, in order to meet the application requirements of the new patent, and apply in accordance with the law, and hope that the trial committee will grant the case as soon as possible to protect the creator. Hard work in research and development, creation, if there is any doubt in the audit committee of the bureau, please do not hesitate to give instructions, the creators will try their best to cooperate, and feel really good.

1‧‧‧Backlight

11‧‧‧reflective layer

12‧‧‧Light guide layer

13‧‧‧Lighting layer

2‧‧‧Lighting device

21‧‧‧ boards

22‧‧‧Lighting elements

3‧‧‧High refractive index scattering point

31‧‧‧Ink

Claims (8)

The light guiding structure of the keyboard backlight module comprises a backlight device, a light emitting device and a plurality of high refractive index scattering points, wherein the backlight device comprises a laminated reflective layer, a light guiding layer and a light shielding layer, and is above the light shielding layer a plurality of buttons are provided; the light emitting device is a reflective layer of the backlight device, and a circuit board having a predetermined circuit positioned at the reflective layer is disposed, and the circuit board is provided with a plurality of light emitting elements; and the plurality of high refractive index scattering The dots are formed on the light guiding layer of the backlight device and are located at positions below the respective buttons, and include inks formed on the surface of the light guiding layer, and high refractive index particles added to the ink at a predetermined ratio to have a light refraction effect. The light guiding structure of the keyboard backlight module of claim 1, wherein the plurality of high refractive index scattering dots are formed by printing, vapor deposition, adhesion or embedding. The light guiding structure of the keyboard backlight module of claim 1, wherein the high refractive index particles added in the ink are oxides or nitrides or diamonds, thereby increasing the refraction of the high refractive index scattering point to the brightness of the light source. , reflection or scattering. The light guiding structure of the keyboard backlight module according to claim 3, wherein the oxide is cerium oxide (SiO ₂ ), aluminum oxide (Al ₂ O ₃ ) or titanium dioxide (TiO ₂ ); It is aluminum nitride (AlN). The light guiding structure of the keyboard backlight module according to claim 3, wherein the high refractive index particles have a particle diameter of 0.1 to 20 μm. The light guiding structure of the keyboard backlight module according to claim 3, wherein the ink system It is a transparent ink with light transmissive properties, and a light-transmitting material of a predetermined color is added to the ink, and the light-transmitting material has a color of yellow, red, blue or green. The light guiding structure of the keyboard backlight module of claim 1, wherein the plurality of high refractive index scattering dots are added with a high refractive index particle in a proportion of 0.1 to 50%. The light guiding structure of the keyboard backlight module according to the first aspect of the invention, wherein the light guiding layer of the backlight device is provided with a plurality of high refractive indexes arranged at an asymmetrical interval with a high refractive index at the top and the bottom. Scattering point.