TWM482759U - Light leakage proof microstructure for through hole of backlight module of keyboard - Google Patents

Description

Anti-light leakage microstructure applied to the hole in the keyboard backlight module

The creation system provides a light leakage prevention microstructure applied to the broken hole of the keyboard backlight module, especially for guiding the optical plate on the upper and lower sides of the broken hole or at the inner wall surface of the broken hole, and having a microstructure, and the microstructure is The light transmitted from the light guide plate to the broken hole is guided back to the inside of the light guide plate to effectively prevent the light guide plate from leaking light at the broken hole.

According to the rapid development of today's electronic technology and information industry, various electronic products are moving toward light, thin, short, small and powerful trends, such as computers, notebook computers, mobile Internet devices (MIDs), smart phones, Tablet PCs, etc., have become indispensable electronic products for modern people in daily life or work, and most of the users and electronic products use mouse, keyboard and other input devices to communicate, and the keyboard is most convenient. Input operations for text, numbers, or commands, and enhance useful functions.

Furthermore, in order to enable the human eye to clearly see the symbols on each button in a low-light environment, a manufacturer introduces a light guide plate and a light source technology into the keyboard, and develops a backlit keyboard with a backlight module to make the backlight The light generated by the module can be projected onto the back of each keycap to form a backlight effect, so that the user can clearly see the symbol on the keycap for convenient operation, and the backlight keyboard currently on the market includes a button module. And a backlight module, wherein the backlight module has a light guide plate, and a light source is disposed at one side of the light guide plate, and the light emitting diode on the light source can be directed toward The light guide plate projects light to make the light guide plate uniformly emit light, and the reflector below the light guide plate is provided with a reflective sheet that can reflect the light emitted from the lower surface of the light guide plate back to the light guide plate, and is provided with a corresponding button module on the surface of the light guide plate. At the light shielding sheet, the light emitted by the light guide plate can be incident on the button module through the light transmitting portion of the light shielding sheet to form a backlight.

However, the light guide plate generally has a plurality of holes for the assembly or fixed use of the pointing stick, the positioning post or other components inside the backlit keyboard, but in actual use, the light source is projected. The light leaks easily from the holes in the light guide plate, causing light leakage, causing the light emitted by the light guide plate to be uneven, and affecting the overall luminous efficiency, and in order to solve the light leakage of the light guide plate due to the broken hole As a result of the problem of uneven light emission, some companies have developed a backlight module that can absorb light transmitted to the hole by the light absorbing layer to prevent light leakage. Please refer to the eighth figure, which is a partial section of the conventional backlight module. The light guide plate A1 of the backlight module A is provided with a hole A11 penetrating to the upper and lower surfaces of the light guide plate A1, and the upper and lower surfaces of the hole A11 are made of ink or other light absorbing material. The light-absorbing layer A12 is formed on the surface of the light guide plate A1, and the light-shielding sheet A3 is disposed on the other side surface of the light-guide plate A1.

However, the design of the backlit keyboard is becoming more and more compact, and the internal space of the backlit keyboard is also narrow. Therefore, manufacturers are not thinking hard to break through the development path, and expect the thickness of the backlit keyboard design to be reduced and thinner. The light guide plate A1 is formed on the side or the two side surfaces of the broken hole A11 to form the light absorbing layer A12 which is printed with black ink or embossed to form a reflective structure, which causes the upper and lower surfaces of the light guide plate A1 to be separated from the reflective sheet A2 and shielded from light. A thickness T is formed between the sheets A3, so that the thickness of the backlight module A cannot be further reduced, so how to be effective The phenomenon that light leakage of the light guide plate A1 at the hole A11 is prevented, and the problem of the overall thickness increase caused by the light absorbing layer A12 of the light guide plate A1 can be solved, which is the key point for those who are engaged in the redesign of the industry.

Therefore, the new creators have designed and produced the relevant materials through the evaluation and consideration of the multi-party evaluation and consideration, and the use of many years of research and development experience in this industry. A new type of anti-light leakage microstructure for the hole in the keyboard backlight module was born.

The main purpose of the present invention is that at least one side of the light guide plate of the backlight module is provided with a light source for projecting light toward the light guide plate, and at least one hole penetrating through the upper and lower surfaces on the light guide plate. And the light guide plate is located at the upper and lower sides of the hole around the hole or the inner wall of the hole is concavely arranged with a microstructure, and the microstructure of the light guide plate can guide the light transmitted from the light guide plate to the hole to be guided back to the light guide plate. In order to effectively prevent the light emitted from the light guide plate from leaking light at the broken hole, and adjust the uniformity and directivity of the light emitted from the light guide plate, and the microstructure does not protrude from the lower surface of the light guide plate, the guide can be guided. The light plate is more conformable to the reflective sheet and the light shielding sheet, and the thickness is not increased, thereby making the overall thickness of the backlight module thinner.

The secondary purpose of the present invention is that the upper and lower surfaces of the perforation of the light guide plate are preferably concavely provided with a microstructure, but in actual application, the inner wall surface of the perforation of the light guide plate may be further recessed. The microstructure of the annular arrangement is only a circular structure arranged in the inner wall surface of the broken hole, and there are many ways of forming the microstructure due to the micro-structure forming, and micro-compression molding, micro-injection molding, and micro-cast molding can also be utilized. Surface micro-feature injection compression molding or carbon dioxide laser processing, or carbon dioxide laser processing to produce the above micro-compression molding , micro-injection molding, micro-casting molding, surface micro-feature injection compression molding or other micro-mold technology required for micro-molding, and then micro-molding by hot pressing, micro-injection molding, micro-cast molding or surface micro-feature injection compression The microstructure is formed at the upper and lower surfaces of the perforation of the light guide plate or at the inner wall surface of the broken hole.

1‧‧‧Backlight module

11‧‧‧Light guide

111‧‧‧Breaking

112‧‧‧Microstructure

113‧‧‧The first short department

12‧‧‧Light source

121‧‧‧Soft circuit board

122‧‧‧Lighting elements

13‧‧‧Reflecting film

131‧‧‧Second Air Force

14‧‧ ‧ shading film

141‧‧‧Transmission Department

15‧‧ ‧Baffle

2‧‧‧Key Module

21‧‧‧floor

22‧‧‧Key unit

221‧‧‧Keycap

222‧‧‧ Linked institutions

23‧‧‧Film board

24‧‧‧Flexible components

A‧‧‧Backlight module

A1‧‧‧Light guide plate

A11‧‧‧ hole

A12‧‧‧Light absorbing layer

A2‧‧‧Reflecting film

A3‧‧ ‧ shading film

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

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

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

The fourth figure is a partial enlarged view of the third figure of the creation.

Figure 5 is a side cross-sectional view of the preferred embodiment of the present invention.

Figure 6 is a perspective view of another preferred embodiment of the present invention.

Figure 7 is a perspective view of a further preferred embodiment of the present invention.

The eighth figure is a partial cross-sectional view of a conventional backlight module.

In order to achieve the above objectives and effects, the technical means and its construction adopted in the present invention are described in detail in the preferred embodiment of the present invention, and the structure and function are as follows.

Please refer to the first, second, third, fourth and fifth figures, which are respectively a perspective view, an exploded view, a side cross-sectional view, a partial enlarged view of the third figure and a side view of the preferred embodiment. The cross-sectional view, as is clear from the figure, includes a backlight module 1 having a light guide plate 11 and at least one through-guide on the light guide plate 11. The hole 111 at the upper and lower surfaces of the light plate 11 and the upper and lower surfaces of the hole 111 are directly concave by micro-compression molding, micro-injection molding, micro-cast molding, surface micro-feature injection compression molding or other micro-molding techniques. a V-shaped U-shaped cross-section microstructure 112 having a concentric circle, a circular or a rectangular array, and a light source 12 having a flexible circuit board 121 and at least one light-emitting element 122 disposed on at least one side of the light guide plate 11 and Preferably, the light-emitting element 122 is coupled to the flexible circuit board 121 to form an electrical connection. However, in practical applications, the light-emitting element 122 can also be a small light bulb or a light tube (such as a cold cathode fluorescent tube). Connected to the flexible circuit board 121 to form an electrical connection.

Further, the light guide plate 11 of the backlight module 1 is provided with a light reflecting sheet 13 at one surface thereof, and a light shielding sheet 14 is disposed on the other side surface of the light reflecting sheet 13 on the surface of the light guide plate 11 and the light reflecting sheet 13. The first hollow portion 113 and the second hollow portion 131 are respectively provided with perforations or slots which can be various shapes, and the retroreflective sheeting 13 is preferably disposed between the light guide plate 11 and the flexible circuit board 121 of the light source 12, but In a practical application, the retroreflective sheeting 13 can also be located at the other side surface of the flexible circuit board 121 relative to the light guide plate 11, so that the flexible circuit board 121 can be abutted against the reflective sheet 13 at the other side surface of the light guide plate 11, And the first hollow portion 113 corresponding to the light guide plate 11 and the light reflecting sheet 13 is positioned in the second hollow portion 131; and the light shielding sheet 14 is opposite to the light guide plate 11 A plurality of transparent portions 141 corresponding to the holes 111 of the light guide plate 11 and the first hollow portion 113 are disposed on the surface of the flexible circuit board 121 at the other side surface, and each of the transparent portions 141 is disposed on the surface of the light shielding sheet 14 The portion 141 can be a perforated or light-transmissive area; and the bottom of the reflective sheet 13 of the backlight module 1 The further abutment affixed positioned coated on the light guide plate 11, reflective plate 13 and the ring at the periphery 14 light shielding baffle plates 15, but in practice, also the guide A light-shielding tape (not shown) is attached around the light plate 11 to prevent the light projected by the light source 12 from being emitted from the side of the light guide plate 11 to emit light more uniformly.

However, the backlight module 1 is further provided with a button module 2, and the button module 2 includes a bottom plate 21, a plurality of button units 22, a film circuit board 23 and at least one elastic member 24, and the button unit 22 is disposed on The bottom plate 21 includes a key cap 221 and a connecting mechanism 222 between the key cap 221 and the bottom plate 21 for the up and down movement of the key cap 221, and the connecting mechanism 222 is preferably a scissor structure for the film. The circuit board 23 is disposed below or above the bottom plate 21, and the elastic member 24 is disposed between the thin film circuit board 23 and the plurality of button units 22, and when the user's finger is pressed against the surface of the keycap 221 of the button unit 22, The keycap 221 pushes down the elastic member 24 and touches the thin film circuit board 23 so that the contacts of the line are in contact with each other to form electrical conduction, so as to generate a trigger signal output corresponding to the symbol of the pressed button unit 22 to The controller of the backlit keyboard is only partially because the structure of the button module 2 and the backlight module 1 is designed, and the composition of the detail is not the creation point of the present invention, and will not be described again.

When the light-emitting element 122 of the light source 12 emits light, light can be projected toward the light guide plate 11 to transmit light uniformly in the light guide plate 11. Since the light-reflecting sheet 13 does not transmit light, the light-guiding plate can be used by the reflective sheet 13. The light emitted from the lower surface of the 11 is reflected back to the light guide plate 11, and the light can pass through only the plurality of transparent portions 141 on the light shielding sheet 14, and then enters the button unit 22 having the light transmissive property on the button module 2. After the out, the effect of the backlight of the backlit keyboard can be achieved, so that the microstructures 112 are recessed around the upper and lower sides of the hole 111 of the light guide plate 11, and the light guided by the light guide plate 11 to the hole 111 can be transmitted. After being refracted and reflected, it is guided back to the inside of the light guide plate 11 to effectively prevent the light guide plate 11 from being fired. The light emitted from the light is broken at the hole 111, and the uniformity and directivity of the light emitted from the light guide plate 11 can be adjusted, and the microstructure 112 does not protrude from the upper and lower surfaces of the light guide plate 11, so that the light guide 112 The light plate 11 and the light-reflecting sheet 13 and the light-shielding sheet 14 are more conformable and the thickness is not increased, and the thickness of the entire backlight module 1 is further reduced.

Please also refer to the third, fourth, sixth and seventh figures, which are respectively a side view of the creation, a partial enlargement of the third figure, a perspective view of another preferred embodiment and a further preferred embodiment. The three-dimensional appearance of the embodiment is clearly seen in the figure, wherein the upper and lower surfaces of the perforation 111 of the light guide plate 11 are preferably implemented by micro-compression molding, micro-injection molding, micro-cast molding, and surface micro-features. The injection molding or other micro-molding technique is provided with a radially arranged microstructure 112. However, in practical applications, the annular structure may be further recessed at the inner wall surface of the hole 111 of the light guide plate 11. Or, the microstructure 112 of the light guide plate 11 located at the upper and lower sides of the hole 111 is omitted, and the annular structure 112 is recessed only at the inner wall surface of the hole 111, and is processed by the microstructure 112. There are many ways, and it is also possible to use a carbon dioxide laser (CO2 laser) to form a microstructure 112 at the upper and lower sides of the hole 111 of the light guide plate 11 or at the inner wall of the hole 111, or to use a carbon dioxide laser. Processing Firstly, the micro-moulds required for the above micro-compression molding, micro-injection molding, micro-cast molding, surface micro-feature injection compression molding or other micro-molding technology are manufactured, and then the micro-molding is subjected to hot press forming, micro-injection molding, micro-casting. Molding or surface micro-feature injection compression molding is provided at the upper and lower sides of the hole 111 of the light guide plate 11 or at the inner wall surface of the hole 111. The microstructure 112 is only required to provide the microstructure 112 to transmit the light guide plate 11 to The light at the hole 111 is guided back to the inside of the light guide plate 11 to effectively prevent light leakage at the hole 111.

The above detailed description is intended to illustrate a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and other equivalents and modifications may be made without departing from the spirit of the invention. Changes are to be included in the scope of patents covered by this creation.

In summary, the creation of the anti-light leakage micro-structure applied to the broken hole of the keyboard backlight module can really achieve its efficacy and purpose. Therefore, the creation is a practical and excellent creation, which is in line with the new patent. Apply for the requirements, apply in accordance with the law, and hope that the trial committee will grant the case as soon as possible to protect the hard work of the new creators. If there is any doubt in the bureau, please do not hesitate to give instructions, the new creators will try their best to cooperate, and feel really good.

1‧‧‧Backlight module

11‧‧‧Light guide

111‧‧‧Breaking

112‧‧‧Microstructure

13‧‧‧Reflecting film

131‧‧‧Second Air Force

14‧‧ ‧ shading film

141‧‧‧Transmission Department

Claims (15)

An anti-light leakage micro-structure applied to a hole in a keyboard backlight module includes a backlight module, wherein the backlight module has a light guide plate, and at least one side of the light guide plate is disposed to project light toward the light guide plate to make the light guide plate a light source for emitting light, and the light guide plate is provided with at least one hole penetrating through the upper and lower sides, and is disposed at a position on the upper and lower sides of the hole to guide the light transmitted to the hole back. The microstructure inside the light guide plate. The anti-light leakage microstructure applied to the hole of the keyboard backlight module according to the first aspect of the patent application, wherein the microstructure of the light guide plate of the backlight module is micro-compression molding, micro-injection molding, micro-cast molding, Surface microfeatures are injection molded or carbon dioxide laser processed. The anti-light leakage microstructure applied to the hole in the backlight module of the keyboard module, as described in claim 1, wherein the microstructure of the backlight module is formed into a concentric circle, a circular array, a rectangular array or a radial arrangement. And the microstructure cross section is V shape. The light leakage preventing microstructure applied to the hole in the keyboard backlight module according to the first aspect of the patent application, wherein the light source of the backlight module has a flexible circuit board, and at least one light emitting component is disposed on the flexible circuit board. And a reflective sheet is disposed on one side surface of the light guide plate, and a light shielding sheet is disposed on the other side surface of the light reflecting sheet. The light leakage preventing microstructure applied to the hole of the keyboard backlight module according to the fourth aspect of the invention, wherein the light guide plate and the surface of the light reflecting sheet are respectively provided with a first hollow portion and a second hollow portion, and Each of the light-emitting elements of the light source protrudes into the first hollow portion and the second hollow portion to be positioned, and the surface of the light shielding sheet is provided with a plurality of transparent portions corresponding to the broken holes of the light guide plate and the first hollow portion. The anti-light leakage microstructure applied to the hole in the keyboard backlight module according to the fourth aspect of the patent application, wherein the light-emitting element is a light-emitting diode, a small light bulb or a light tube. The anti-light leakage microstructure applied to the hole of the keyboard backlight module according to the first aspect of the patent application, wherein the inner wall surface of the broken hole on the light guide plate of the backlight module is further recessed with a circular arrangement of microstructures . The anti-light leakage micro-structure applied to the hole of the keyboard backlight module according to the first aspect of the patent application, wherein the backlight module further comprises a button module, and the button module comprises a bottom plate and a plurality of buttons a unit, a thin film circuit board and at least one elastic component, and the button unit is disposed on the bottom plate, and includes a key cap and a connecting mechanism between the key cap and the bottom plate for the up and down movement of the key cap, and the thin film circuit board is disposed on the Below or above the bottom plate, the elastic member is disposed between the thin film circuit board and the plurality of button units. An anti-light leakage micro-structure applied to a hole in a keyboard backlight module includes a backlight module, wherein the backlight module has a light guide plate, and at least one side of the light guide plate is disposed to project light toward the light guide plate to make the light guide plate a light source for emitting light, and the light guide plate is provided with at least one hole penetrating through the upper and lower sides, and the inner wall surface of the hole is concavely disposed to guide the light transmitted to the hole to the inside of the light guide plate. microstructure. The anti-light leakage microstructure applied to the hole in the backlight module of the keyboard module, as described in claim 9, wherein the microstructure of the backlight module is micro-hot pressing, micro-injection molding, micro-cast molding, Surface microfeatures are injection molded or carbon dioxide laser processed. The anti-light leakage micro-structure applied to the hole in the backlight module of the keyboard module according to claim 9 , wherein the microstructure of the backlight module is formed in a ring shape. The light leakage preventing microstructure applied to the hole of the keyboard backlight module according to claim 9 , wherein the light source of the backlight module has a flexible circuit board, and at least one light emitting component is disposed on the flexible circuit board. And a reflective sheet is disposed on one side surface of the light guide plate, and a light shielding sheet is disposed on the other side surface of the light reflecting sheet. The anti-light leakage micro-structure applied to the hole of the keyboard backlight module according to claim 12, wherein the light guide plate and the surface of the reflector are respectively provided with a first hollow portion and a second hollow portion, and Each of the light-emitting elements of the light source protrudes into the first hollow portion and the second hollow portion to be positioned, and the surface of the light shielding sheet is provided with a plurality of transparent portions corresponding to the broken holes of the light guide plate and the first hollow portion. The anti-light leakage microstructure applied to the hole in the keyboard backlight module according to claim 12, wherein the light-emitting element is a light-emitting diode, a small light bulb or a light tube. The anti-light leakage micro-structure applied to the hole of the keyboard backlight module according to the ninth application of the patent application, wherein the backlight module further comprises a button module, and the button module comprises a bottom plate and a plurality of buttons a unit, a thin film circuit board and at least one elastic component, and the button unit is disposed on the bottom plate, and includes a key cap and a connecting mechanism between the key cap and the bottom plate for the up and down movement of the key cap, and the thin film circuit board is disposed on the Below or above the bottom plate, the elastic member is disposed between the thin film circuit board and the plurality of button units.