A multifunctional keyboard backlight module

Abstract

The present invention discloses a multifunctional keyboard backlight module, which belongs to the field of multifunctional keyboard backlight equipment, including a keyboard housing, a power board, a flexible circuit board, a plurality of light-transmitting keycaps, a plurality of linkage modules and a plurality of light-emitting modules, wherein the power board is arranged in the keyboard housing, the flexible circuit board is arranged in the keyboard housing, one end of a group of linkage modules is movably connected with a light-transmitting keycap, the light-emitting module is electrically connected with the power board, and the light-emitting module includes a plurality of backlight areas arranged along the width direction of the keyboard, and a backlight area matches the position of a linkage module. The present invention has the beneficial effect of splitting the lamp beads on the power board into a plurality of light-emitting modules, avoiding welding all the lamp beads on a power board, greatly reducing the production time of the keyboard, optimizing the production process of the keyboard, and reducing the production cost of the keyboard.

Description

Technical Field

[0001] The invention relates to the technical field of multifunctional keyboard backlight equipment, in particular to a multifunctional keyboard backlight module. Background Art

[0002] The keyboard is a common input device, mainly used as a communication medium between the user and the electronic device. In order to use the keyboard in a low-light environment, manufacturers add a light-emitting structure to the keyboard, which illuminates the keys through the light beads so that the human eye can see clearly.

[0003] At present, the main lighting method of membrane keyboards is to install a lighting structure on the edge of the keyboard to make the keyboard keys glow by refraction. Although this lighting method can be used, due to the different distances of the light propagation path, the light will be attenuated when it shines on different keys, which can easily cause uneven brightness of the keys and affect the viewing experience.

[0004] In order to solve the above technical problems, a Chinese patent application with application number CN200620123343.8, filed on August 7, 2006, discloses a luminous membrane switch and a luminous keyboard thereof. In the patent, independent lamp beads are arranged on a power board to illuminate each key. Although this structural design can solve the problem of uneven lamp beads, each lamp bead needs to be welded on a power board, so the welding time is long, which greatly reduces the production time of the keyboard and increases the production cost of the keyboard. Summary of the invention

[0005] The purpose of the present invention is to provide a multifunctional keyboard backlight module to solve the current technical problem that each lamp bead needs to be welded on a power board, which reduces the keyboard production time.

[0006] Based on the above-mentioned purpose, the present invention provides a multifunctional keyboard backlight module, including a keyboard housing; a power board, arranged in the keyboard housing; a flexible circuit board, arranged in the keyboard housing; a plurality of light-transmitting keycaps; a plurality of groups of linkage modules, one end of a group of linkage modules is movably connected to a light-transmitting keycap, and the other end thereof is movably connected to the power board; a plurality of groups of light-emitting modules arranged along the length direction of the keyboard, the light-emitting modules are electrically connected to the power board, and the light-emitting modules include a plurality of backlight areas arranged along the width direction of the keyboard, and the position of one of the backlight areas matches that of a linkage module.

[0007] Preferably, a keyboard light source is arranged on the backlight area, and the light-emitting module includes a light guide layer and a wiring layer arranged in sequence, the light guide layer is used to conduct light from the keyboard light source, an electrical flow channel is arranged in the wiring layer, one end of the electrical flow channel is electrically connected to the keyboard light source, and the other end of the electrical flow channel is provided with an electrical plug electrically connected to a power board, and an extension portion is provided on the side of the light guide layer facing the keyboard light source.

[0008] Preferably, the linkage module includes a linkage base fixed to the upper end of the power board and a linkage mechanism movably connected to the linkage base, a light-through hole is provided in the middle of the linkage base, and a first light-transmitting groove and a second light-transmitting groove are provided on the linkage base.

[0009] Preferably, the light guiding layer includes an annular light guiding portion, and the linkage base is arranged in the annular light guiding portion.

[0010] Preferably, a first refractive protrusion which can be inserted into the first light-transmitting groove is disposed at the upper end of the light-guiding layer, and a first supporting block is disposed on the wiring layer toward the center of the backlight area, and the first refractive protrusion is in contact with the first supporting block.

[0011] Preferably, a second refractive protrusion which can be plugged into the second light-transmitting groove is disposed on the upper end of the light-guiding layer, and a second supporting block is disposed on the wiring layer toward the center of the backlight area, and the second refractive protrusion is in contact with the second supporting block.

[0012] Preferably, the electrical flow channel includes a main conductor and a plurality of branch conductors, one of the branch conductors is electrically connected to a keyboard light source in a backlight area, and a plurality of the branch conductors are connected in parallel and are all electrically connected to the main conductor.

[0013] Preferably, the light-emitting module also includes a plurality of shading elements fixed on the power board, one of the shading elements is arranged at the upper end of a keyboard light source, a refraction end is provided on the shading element, the shading element and the keyboard light source form an opening structure, and the extension part is inserted and extended into the opening structure.

[0014] Preferably, the linkage module also includes a plug-in base fixed to the lower end of the power board, and at least one plug-in protrusion is provided at one end of the plug-in base facing the linkage base. At least one plug-in slot is provided on the linkage base, and the plug-in protrusion can pass through the power board and be plugged and fixed with the plug-in slot. A clamping flange is provided on the outer wall of the linkage base, and the lower end of the clamping flange is in contact with the annular light guide portion and presses the annular light guide portion to the upper end of the power board.

[0015] Preferably, the light emitting module further comprises a reflective layer arranged between the light guide layer and the wiring layer.

[0016] The beneficial effect of the present invention is that the lamp beads on the power board are split into multiple light-emitting modules, avoiding the welding of all the lamp beads on a power board, greatly reducing the production time of the keyboard, optimizing the production process of the keyboard, and reducing the production cost of the keyboard. In addition, by arranging a light guide layer on the upper end of the wiring layer, the direct light of the keyboard light source is converted into scattered light, avoiding the direct light of the keyboard light source. At the same time, the keyboard light source is close to the transparent keycap, the brightness attenuation and dispersion are less, and the light can be evenly dispersed through the guidance of the light guide layer, ensuring the brightness of the light when passing through the transparent keycap. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the explosion structure of the present invention;

[0019] Figure 3 is a schematic diagram of the three-dimensional structure of the light-emitting module in the present invention;

[0020] Figure 4 It is a schematic diagram of the explosion structure of the linkage module in the present invention;

[0021] Figure 5 It is a schematic diagram of the exploded structure of the light-emitting module in the present invention;

[0022] Figure 6 It is a schematic diagram of the installation structure of the shading element in the present invention;

[0023] Figure 7 It is a schematic diagram of the exploded structure of the shading element in the present invention;

[0024] Figure 8 is a schematic diagram of the three-dimensional structure of the shading element in the present invention;

[0025] Fig. 9 It is a schematic diagram of the explosion structure of the reflective layer in the present invention.

[0026] In the figure: 1. keyboard housing; 2. power board; 3. flexible circuit board; 4. light-transmitting keycap; 5. linkage module; 51. linkage base; 511. light-through hole; 512. first light-transmitting groove; 513. second light-transmitting groove; 514. plug-in groove; 515. clamping flange; 52. linkage mechanism; 521. elastic cap; 522. elastic connector; 53. plug-in base; 531. plug-in protrusion; 6. light-emitting module; 61. backlight area; 62. keyboard light source; 63. light-guiding layer; 631. extension part; 632. annular light-guiding part; 633. first refractive protrusion; 634. second refractive protrusion; 64. wiring layer; 641. first support block; 642. second support block; 65. electrical flow channel; 651. main conductor; 652. branch conductor; 66. reflective layer; 7. shading element; 71. refractive end. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0028] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. "Include" or "comprise" and other similar words used in the present disclosure mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and other similar words are not limited to physical or mechanical connections, but may also include electrical connections, whether direct or indirect. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0029] In one embodiment, see Figure 1 to Figure 2 As shown, a multifunctional keyboard backlight module provided by the present invention includes: a keyboard housing 1, a power board 2, a flexible circuit board 3, a plurality of light-transmitting keycaps 4, a plurality of linkage modules 5 and a plurality of group light-emitting modules 6.

[0030] The keyboard housing 1 has an installation cavity which can be opened and closed.

[0031] The power board 2 is disposed in the keyboard housing 1 and can be fixed by bolts.

[0032] The flexible circuit board 3 is arranged in the keyboard housing 1. The flexible circuit board 3 includes a plastic film 1 and a plastic film 2 on which circuits are drawn, and an insulating film with through holes is arranged between the plastic film 1 and the plastic film 2.

[0033] A plurality of light-transmitting keycaps 4 are provided, and a receiving groove is provided at the upper end of the keyboard housing 1, and the light-transmitting keycaps 4 can be placed in the receiving groove.

[0034] A plurality of linkage modules 5 are provided, one end of each linkage module 5 being movably connected to a light-transmitting keycap 4, and the other end thereof being movably connected to the power board 2. The linkage modules 5 are mainly used to support the light-transmitting keycap 4, and to reset the light-transmitting keycap 4 after being pressed, thereby providing a reset force for the light-transmitting keycap 4.

[0035] A plurality of groups of light emitting modules 6 are arranged along the length direction of the keyboard, and the light emitting modules 6 are electrically connected to the power board 2. The light emitting modules 6 include a plurality of backlight areas 61 arranged along the width direction of the keyboard, and one backlight area 61 matches the position of one linkage module 5. The light emitting module 6 adopts a modular design, and each backlight area 61 can provide light for one light-transmitting keycap 4.

[0036] Specifically, the present invention splits the lamp beads on the power board 2 into multiple light-emitting modules 6, which greatly reduces the production time of the keyboard, optimizes the production process of the keyboard, and reduces the production cost of the keyboard. Keyboards of different specifications can use the same light-emitting module 6, thereby reducing the development of molds and further reducing the production cost of the keyboard.

[0037] As an example, the existing keyboard lamp beads are usually arranged in two ways. One is to arrange the lamp beads on the edge of the keyboard and use the light guide plate to guide the light. The other is to set an independent lamp bead under each key. When the keyboard adopts the former lamp bead arrangement method, since the distance between each key and the lamp bead is inconsistent, the lamp bead of each key has a certain brightness attenuation, resulting in a certain brightness difference. When the keyboard adopts the latter lamp bead arrangement method, in addition to the longer lamp bead welding process, the light generated by the lamp bead will directly shine in the direction of the human eye, resulting in a dazzling effect.

[0038] See also Figures 1 to 3As shown, in order to solve the problem of glare and uneven brightness of the lamp beads, a keyboard light source 62 is arranged on the backlight area 61, and the light-emitting module 6 includes a light-guiding layer 63 and a wiring layer 64 arranged in sequence. The light-guiding layer 63 is used to conduct the light of the keyboard light source 62, and an electrical flow channel 65 is arranged in the wiring layer 64. One end of the electrical flow channel 65 is electrically connected to the keyboard light source 62, and the other end of the electrical flow channel 65 is provided with an electrical plug electrically connected to the power board 2. The light-guiding layer 63 is provided with an extension 631 on the side facing the keyboard light source 62. Among them, the light-guiding layer 63 can be made of transparent materials, such as plastics; the light-guiding layer 63 and the wiring layer 64 can be connected into a whole by hot pressing or ultrasonic welding; the keyboard light source 62 can use light-emitting devices such as LED lamp beads.

[0039] Specifically, this example sets a light-guiding layer 63 for guiding light on the upper end of the wiring layer 64, thereby converting the direct light of the keyboard light source 62 into scattered light to avoid a glaring effect. At the same time, the keyboard light source 62 is closer to the transparent keycap 4, and the brightness attenuation and dispersion are less. The light can be evenly dispersed through the guidance of the light-guiding layer 63, ensuring the brightness of the light when passing through the transparent keycap 4.

[0040] As an example, see Figures 1 to 4 As shown, in order to increase the light transmittance of the light-transmitting keycap 4, the linkage module 5 includes a linkage base 51 fixed to the upper end of the power board 2 and a linkage mechanism 52 movably connected to the linkage base 51. A light-through hole 511 is provided in the middle of the linkage base 51, and a first light-transmitting groove 512 and a second light-transmitting groove 513 are provided on the linkage base 51. The linkage mechanism 52 includes an elastic cap 521 and an elastic connector 522. The elastic cap 521 passes through the light-through hole 511 and is used to press the flexible circuit board 3 to generate a key signal. The elastic connector 522 is used to support the light-transmitting keycap 4 and reset the light-transmitting keycap 4 after being pressed. The linkage base 51 and the linkage mechanism 52 can be made of light-transmitting materials, such as plastic.

[0041] Specifically, in this example, the light passing area is increased by adding the light-through hole 511 , the first light-transmitting groove 512 and the second light-transmitting groove 513 , thereby improving the light transmittance of the light-transmitting keycap 4 .

[0042] As an example, see Figures 1 to 5 As shown, in order to further improve the uniformity of light passing through the transparent keycap 4, the light guide layer 63 includes an annular light guide portion 632, and the linkage base 51 is disposed in the annular light guide portion 632. The annular light guide portion 632 is designed around the linkage module 5 and can overlap with most of the area of ​​the transparent keycap 4.

[0043] Specifically, this example guides the light of the keyboard light source 62 by adding an annular light guide portion 632 so that the light can surround the transparent keycap 4, thereby increasing the brightness of the transparent keycap 4 and improving the uniformity of the light passing through the transparent keycap 4.

[0044] As an example, see Figures 1 to 5 As shown, in order to further improve the uniformity of light passing through the light-transmitting keycap 4, the upper end of the light-guiding layer 63 is provided with a first refractive protrusion 633 that can be inserted into the first light-transmitting groove 512, and the wiring layer 64 is provided with a first supporting block 641 toward the center of the backlight area 61, and the first refractive protrusion 633 is in contact with the first supporting block 641. Among them, the first light-transmitting groove 512 is opened on the outer wall of the linkage base 51.

[0045] Specifically, this example changes the scattering angle of the light by setting the first refractive protrusion 633, so that the light can be scattered evenly when passing through the first light-transmitting groove 512, further improving the brightness and uniformity of the light when passing through the light-transmitting keycap 4.

[0046] As an example, see Figures 1 to 5 As shown, in order to further improve the uniformity of light passing through the light-transmitting keycap 4, the upper end of the light-guiding layer 63 is provided with a second refractive protrusion 634 that can be plugged into the second light-transmitting groove 513, and the wiring layer 64 is provided with a second supporting block 642 toward the center of the backlight area 61, and the second refractive protrusion 634 is fitted with the second supporting block 642. Among them, the second light-transmitting groove 513 is opened in the light-through hole 511.

[0047] Specifically, this example changes the scattering angle of the light by setting the second refractive protrusion 634, so that the light can be scattered evenly when passing through the second light-transmitting groove 513, further improving the brightness and uniformity of the light when passing through the light-transmitting keycap 4.

[0048] As an example, see Figures 1 to 5 As shown, in order to improve the stability of the keyboard when in use, the electrical flow channel 65 includes a main conductor 651 and a plurality of branch conductors 652, one branch conductor 652 is electrically connected to a keyboard light source 62 of a backlight area 61, and a plurality of branch conductors 652 are connected in parallel to each other and are all electrically connected to the main conductor 651.

[0049] Specifically, this example provides power to the keyboard light source 62 through the branch wire 652, so that the power supply of each keyboard light source 62 is relatively independent, ensuring the stability of the keyboard when in use and facilitating the maintenance of the keyboard.

[0050] As an example, see Figures 1 to 8As shown, in order to further improve the brightness of the light, the light emitting module 6 also includes a plurality of shading elements 7 fixed on the power board 2, one shading element 7 is arranged at the upper end of a keyboard light source 62, a refraction end 71 is arranged on the shading element 7, the shading element 7 and the keyboard light source 62 form an opening structure, and the extension part 631 is inserted and extended into the opening structure. Among them, the shading element 7 is made of reflective material, such as stainless steel, plastic and other materials; the keyboard light source 62 is arranged in the direction of the user; the shading element 7 has two plug-in ends, and a protruding connection groove is arranged on the power base plate, and the plug-in end is inserted into the connection groove, thereby fixing the shading element 7.

[0051] Specifically, this example reflects the light of the keyboard light source 62 through the shading element 7, so that the light is refracted from the extension portion 631 along the light guide layer 63, thereby reducing the dispersion of the light and ensuring the brightness of the light passing through the transparent keycap 4.

[0052] As an example, see Figures 1 to 8 As shown, in order to facilitate the rapid installation of the keyboard, the linkage module 5 also includes a plug-in base 53 fixed to the lower end of the power board 2, and at least one plug-in protrusion 531 is provided at one end of the plug-in base 53 facing the linkage base 51. At least one plug-in groove 514 is provided on the linkage base 51. The plug-in protrusion 531 can pass through the power board 2 and be plugged and fixed with the plug-in groove 514. A clamping flange 515 is provided on the outer wall of the linkage base 51. The lower end of the clamping flange 515 is in conflict with the annular light guide portion 632, and the annular light guide portion 632 is pressed against the upper end of the power board 2.

[0053] Specifically, in this example, the linkage module 5 and the light-emitting module 6 can be quickly fixed by the cooperation between the plug-in base 53 and the linkage base 51, thereby reducing the assembly time of the keyboard, improving the assembly efficiency of the keyboard, and reducing the production cost of the keyboard.

[0054] As an example, see Fig. 9 As shown, the brightness of light passing through the transparent keycap 4 is further improved, and the light emitting module 6 further includes a reflective layer 66 disposed between the light guide layer 63 and the wiring layer 64. The reflective layer 66 is made of a material that can reflect light, such as a silver plastic film, a metal film, and the like.

[0055] Specifically, this example can change the scattering angle of light by setting a reflective layer 66 between the light guide layer 63 and the wiring layer 64, so that the light propagates toward the direction close to the transparent keycap 4, further improving the brightness and uniformity of the light when passing through the transparent keycap 4.

[0056] In general, the present invention splits the keyboard light source 62 on the power board 2 into multiple light-emitting modules 6, avoiding welding all the keyboard light sources 62 on one power board 2, greatly reducing the production time of the keyboard, optimizing the keyboard production process, and reducing the production cost of the keyboard. In addition, by setting a light guide layer 63 at the upper end of the wiring layer 64, the direct light of the keyboard light source 62 is converted into scattered light, avoiding the direct light of the keyboard light source 62. At the same time, the keyboard light source 62 is close to the transparent keycap 4, the brightness attenuation and dispersion are less, and the light can be evenly dispersed through the guidance of the light guide layer 63, ensuring the brightness of the light when passing through the transparent keycap 4.

[0057] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A multifunctional keyboard backlight module, characterized in that: include: Keyboard housing (1); A power board (2) is arranged in the keyboard housing (1); A flexible circuit board (3) is arranged in the keyboard housing (1); A plurality of light-transmitting keycaps (4); A plurality of groups of linkage modules (5), one end of a group of linkage modules (5) being movably connected to a light-transmitting keycap (4), and the other end of a group of linkage modules (5) being movably connected to a power supply board (2); A plurality of groups of light emitting modules (6) arranged along the length direction of the keyboard, the light emitting modules (6) being electrically connected to the power board (2), the light emitting modules (6) comprising a plurality of backlight areas (61) arranged along the width direction of the keyboard, the position of one backlight area (61) matching that of one linkage module (5); A keyboard light source (62) is arranged on the backlight area (61); the light emitting module (6) comprises a light guide layer (63) and a wiring layer (64) arranged in sequence; the light guide layer (63) is used to conduct light from the keyboard light source (62); an electrical flow channel (65) is arranged in the wiring layer (64); one end of the electrical flow channel (65) is electrically connected to the keyboard light source (62); the other end of the electrical flow channel (65) is provided with an electrical plug electrically connected to the power board (2); and an extension portion (631) is provided on a side of the light guide layer (63) facing the keyboard light source (62); The linkage module (5) comprises a linkage base (51) fixed to the upper end of the power board (2) and a linkage mechanism (52) movably connected to the linkage base (51); a light-through hole (511) is provided in the middle of the linkage base (51); and a first light-transmitting groove (512) and a second light-transmitting groove (513) are provided on the linkage base (51); The light guide layer (63) comprises an annular light guide portion (632), and the linkage base (51) is arranged in the annular light guide portion (632); The linkage module (5) further comprises a plug-in base (53) fixed to the lower end of the power board (2); at least one plug-in protrusion (531) is provided at one end of the plug-in base (53) facing the linkage base (51); at least one plug-in slot (514) is provided on the linkage base (51); the plug-in protrusion (531) can pass through the power board (2) and be plugged and fixed with the plug-in slot (514); a clamping flange (515) is provided on the outer wall of the linkage base (51); the lower end of the clamping flange (515) contacts the annular light guide portion (632) and presses the annular light guide portion (632) against the upper end of the power board (2).

2. The multifunctional keyboard backlight module according to claim 1, characterized in that: The upper end of the light guide layer (63) is provided with a first refractive protrusion (633) that can be inserted into the first light-transmitting groove (512), and the wiring layer (64) is provided with a first supporting block (641) toward the center of the backlight area (61), and the first refractive protrusion (633) is in contact with the first supporting block (641).

3. The multifunctional keyboard backlight module according to claim 2, characterized in that: The upper end of the light guide layer (63) is provided with a second refractive protrusion (634) that can be plugged into the second light-transmitting groove (513), and the wiring layer (64) is provided with a second supporting block (642) toward the center of the backlight area (61), and the second refractive protrusion (634) is in contact with the second supporting block (642).

4. The multifunctional keyboard backlight module according to claim 3, characterized in that: The electrical flow channel (65) comprises a main conductor (651) and a plurality of branch conductors (652); one branch conductor (652) is electrically connected to a keyboard light source (62) of a backlight area (61); and a plurality of branch conductors (652) are connected in parallel to each other and are all electrically connected to the main conductor (651).

5. The multifunctional keyboard backlight module according to claim 4, characterized in that: The light emitting module (6) further comprises a plurality of shading elements (7) fixed on the power board (2); one of the shading elements (7) is arranged at the upper end of a keyboard light source (62); a refractive end (71) is arranged on the shading element (7); the shading element (7) and the keyboard light source (62) form an opening structure; the extension portion (631) is plugged and extended into the opening structure.

6. The multifunctional keyboard backlight module according to claim 1, characterized in that: The light-emitting module (6) further comprises a light-reflecting layer (66) arranged between the light-guiding layer (63) and the wiring layer (64).

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