Luminous keyboard and backlight module thereof
By arranging the three light emitting units into triangles in the light emitting keyboard and setting a microstructure area on the light guide plate, the problems of high power consumption and manufacturing cost caused by excessive number of light emitting diodes in the prior art are solved, and the power consumption of the light emitting keyboard is reduced and the light emitting uniformity is improved.
Patent Information
- Application Number
- CN202411380916.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2023-11-19
- Filing Date
- 2024-09-30
- Publication Date
- 2025-05-20
AI Technical Summary
The excessive number of LEDs in existing light-emitting keyboards leads to increased power consumption and high manufacturing costs.
The three light emitting units are adopted as one unit and arranged in a triangle shape. The formed light emitting region overlaps the projected region of at least two key caps to reduce the number of light emitting units. At the same time, the light guide plate is equipped with relatively sparse and dense microstructure areas on the connection lines of the light emitting unit to ensure uniform luminescence.
It effectively reduces the number of light emitting units, reduces power consumption and manufacturing costs, and achieves highly uniform light emission of a single key and an overall light emitting keyboard.
Smart Images
Figure CN120020989A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a backlit keyboard and its backlight module, and particularly to a backlit keyboard and its backlight module that can reduce the number of light-emitting units to reduce power consumption. Background Art
[0002] With the development of technology, the design of keyboards has become increasingly diverse. When users choose a keyboard, in addition to having basic input functions, the visual effect of the keyboard is also valued by users. Currently, backlit keyboards have been introduced on the market. In addition to being visually attractive to users, they can also be used at night or in places with insufficient lighting. In the prior art, at least one light-emitting diode is correspondingly arranged below each key of the backlit keyboard. Too many light-emitting diodes will increase power consumption and manufacturing costs. Summary of the Invention
[0003] In view of the problems in the prior art, the present invention provides a solution to solve the above problems.
[0004] Therefore, the technical problem to be solved by the present invention is to provide a backlit keyboard, which includes: A plurality of keys, each of the plurality of keys having a keycap; and A backlight module located below the plurality of keys, the backlight module including a plurality of light-emitting units, three of the plurality of light-emitting units being arranged in a triangle to form a light-emitting area, and the light-emitting area overlapping with the projection areas of at least two keycaps.
[0005] The present invention also provides a backlit keyboard, which includes: A plurality of keys; and A backlight module located below the plurality of keys, the backlight module including a plurality of light-emitting units and a light guide plate, three of the plurality of light-emitting units being arranged in a triangle, and the light guide plate being provided with two relatively sparse microstructure areas and at least one relatively dense microstructure area on the connection line of at least two of the three light-emitting units, the two relatively sparse microstructure areas being adjacent to the at least two light-emitting units respectively, and the at least one relatively dense microstructure area being located between the two relatively sparse microstructure areas.
[0006] As an optional technical solution, the connection line of at least two of the three light-emitting units overlaps with the projection areas of at least two keycaps.
[0007] As an alternative technical solution, the backlight module further includes a light guide plate. The light guide plate is provided with two relatively sparse microstructure regions and at least one relatively dense microstructure region on the connection line of at least two of the three light-emitting units. The two relatively sparse microstructure regions are respectively adjacent to the at least two light-emitting units, and the at least one relatively dense microstructure region is located between the two relatively sparse microstructure regions.
[0008] As an alternative technical solution, the plurality of keys respectively have keycaps, and the connection line of at least two of the three light-emitting units overlaps with the projection areas of at least two keycaps.
[0009] As an alternative technical solution, at least one of the three light-emitting units overlaps with the gap between two adjacent keys.
[0010] As an alternative technical solution, the illuminated keyboard further includes a bottom plate. The bottom plate is located between the plurality of keys and the backlight module. The bottom plate has a plurality of plate holes, and the plurality of plate holes overlap with the two relatively sparse microstructure regions and the at least one relatively dense microstructure region.
[0011] As an alternative technical solution, each light-emitting unit includes a plurality of die. The plurality of die are arranged in succession with their short sides facing each other.
[0012] As an alternative technical solution, each light-emitting unit includes a plurality of die. The long sides of the plurality of die are arranged in succession along the length direction of the light-emitting unit.
[0013] As an alternative technical solution, one of the three light-emitting units is arranged obliquely with respect to the other two of the three light-emitting units.
[0014] As an alternative technical solution, the different-color die of any two of the three light-emitting units are arranged close to each other.
[0015] As an alternative technical solution, two adjacent keys in the longitudinal direction of the illuminated keyboard are offset in the transverse direction of the illuminated keyboard.
[0016] The present invention also provides a backlight module, which includes: A plurality of light-emitting units, three of the plurality of light-emitting units are arranged in a triangle; and A light guide plate. The light guide plate is provided with two relatively sparse microstructure regions and at least one relatively dense microstructure region on the connection line of at least two of the three light-emitting units. The two relatively sparse microstructure regions are respectively adjacent to the at least two light-emitting units, and the at least one relatively dense microstructure region is located between the two relatively sparse microstructure regions.
[0017] Compared with the prior art, in the present invention, three light-emitting units are arranged in a triangle with three light-emitting units as a unit, and the light-emitting area formed by the three light-emitting units can overlap with the projection areas of at least two keycaps. Thereby, the number of light-emitting units can be effectively reduced, and thus the power consumption and manufacturing cost can be reduced. In addition, on the connection line of at least two of the three light-emitting units of the light guide plate, two relatively sparse microstructure areas and at least one relatively dense microstructure area are provided, and at least one relatively dense microstructure area is located between the two relatively sparse microstructure areas. By providing the relatively dense microstructure area and the relatively sparse microstructure area, highly uniform light emission can be achieved for both a single key and the overall illuminated keyboard.
[0018] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, but it is not intended to limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 FIG. is a schematic diagram of an illuminated keyboard according to an embodiment of the present invention.
[0020] Figure 2 is Figure 1 a partial schematic diagram of the illuminated keyboard in
[0021] Figure 3 FIG. is a schematic diagram of a light-emitting unit according to an embodiment of the present invention.
[0022] Figure 4 FIG. is a schematic diagram of a light-emitting unit according to another embodiment of the present invention.
[0023] Figure 5 FIG. is a partial schematic diagram of an illuminated keyboard according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0024] To further understand the purpose, structure, features and functions of the present invention, the following is a detailed description in conjunction with the embodiments.
[0025] Please refer to Figure 1 and Figure 2 , Figure 1 FIG. is a schematic diagram of an illuminated keyboard 1 according to an embodiment of the present invention, Figure 2 is Figure 1 a partial schematic diagram of the illuminated keyboard 1 in
[0026] As shown in Figure 1 and Figure 2As shown, the illuminated keyboard 1 includes a plurality of keys 10, a backlight module 12, and a base plate 14. The backlight module 12 is located below the plurality of keys 10, and the base plate 14 is located between the plurality of keys 10 and the backlight module 12. Further, the plurality of keys 10 are disposed on the base plate 14, and the base plate 14 is disposed on the backlight module 12. In this embodiment, two adjacent keys 10 in the longitudinal Y direction of the illuminated keyboard 1 may be offset in the transverse X direction of the illuminated keyboard 1. The plurality of keys 10 respectively have keycaps 100. In practical applications, the plurality of keys 10 may also respectively have a support device and a reset member (not shown in the figure). The support device is disposed between the keycap 100 and the base plate 14. When the keycap 100 is pressed, the keycap 100 will move vertically in the direction of the base plate 14 along with the support device. The reset member is disposed between the keycap 100 and the base plate 14, and the reset member may be a rubber dome, but is not limited thereto. In addition, a circuit board (not shown in the figure) may be disposed on the base plate 14. The circuit board has switches corresponding to the keys 10, such as membrane switches or other trigger switches.
[0027] In this embodiment, the keycap 100 may have a light-transmitting area 1000, and the base plate 14 may have a plurality of plate holes 140, where the positions of the plate holes 140 of the base plate 14 correspond to the positions of the light-transmitting areas 1000 of the keycaps 100. The periphery of the light-transmitting area 1000 is an opaque area. It should be noted that the number and positions of the light-transmitting areas 1000 and the plate holes 140 may be determined according to actual applications and are not limited to the embodiments shown in the figure. The light emitted by the backlight module 12 can be projected out from the light-transmitting area 1000 of the keycap 100 through the plate holes 140 of the base plate 14, thereby forming a light-emitting pattern corresponding to the light-transmitting area 1000.
[0028] In this embodiment, the backlight module 12 may include a plurality of light-emitting units 120 and a light guide plate 122. The light guide plate 122 may have a plurality of accommodation holes 1220 for respectively accommodating the plurality of light-emitting units 120. The light-emitting units 120 may be light-emitting diodes that emit light from five sides or one side, depending on actual applications. Three of the plurality of light-emitting units 120 are arranged in a triangle to form a light-emitting area, where the light-emitting area overlaps with the projection areas of at least two keycaps 100. As Figure 2As shown, three light-emitting units 120a, 120b, and 120c are arranged in a triangle to form a light-emitting area LA1, and the light-emitting area LA1 overlaps with the projection areas of the four keycaps 100; three light-emitting units 120a, 120b, and 120d are arranged in a triangle to form a light-emitting area LA2, and the light-emitting area LA2 overlaps with the projection areas of the four keycaps 100. Further, in the present invention, three light-emitting units 120 are taken as a unit and arranged in a triangle so that the light-emitting area formed by every three light-emitting units 120 can provide light for at least two keycaps 100. Thereby, the number of light-emitting units 120 can be effectively reduced, and thus the power consumption and manufacturing cost can be reduced.
[0029] The following uses Figure 2 the three light-emitting units 120a, 120b, and 120c in
[0030] As Figure 2 shown, the connection line of at least two of the three light-emitting units 120a, 120b, and 120c can overlap with the projection areas of at least two keycaps 100. In this embodiment, the connection line of two light-emitting units 120a and 120b can overlap with the projection areas of two keycaps 100, the connection line of two light-emitting units 120a and 120c can overlap with the projection areas of two keycaps 100, and the connection line of two light-emitting units 120b and 120c can overlap with the projection areas of two keycaps 100, but not limited thereto. The connection line of two light-emitting units can also overlap with the projection areas of more than two keycaps 100, depending on the actual application. In addition, the position of at least one of the three light-emitting units 120a, 120b, and 120c can overlap with the gap g between two adjacent keys 10. In this embodiment, any one of the three light-emitting units 120a, 120b, and 120c overlaps with the gap g between two adjacent keys 10, but not limited thereto. At least one of the three light-emitting units 120a, 120b, and 120c can also overlap with the projection area of the keycap 100 of the key 10, depending on the actual application.
[0031] In this embodiment, the light guide plate 122 is provided with two relatively sparse microstructure areas 1222 and at least one relatively dense microstructure area 1224 on the connection line of at least two of the three light-emitting units 120a, 120b, and 120c, wherein the two relatively sparse microstructure areas 1222 are respectively adjacent to at least two light-emitting units, and at least one relatively dense microstructure area 1224 is located between the two relatively sparse microstructure areas 1222. As Figure 2As shown, on the connection line between two light-emitting units 120b and 120c, the light guide plate 122 may be provided with two relatively sparse microstructure regions 1222 and two relatively dense microstructure regions 1224. Among them, the two relatively sparse microstructure regions 1222 are respectively adjacent to the two light-emitting units 120b and 120c, and the two relatively dense microstructure regions 1224 are located between the two relatively sparse microstructure regions 1222. In other words, the relatively sparse microstructure regions 1222 are closer to the light-emitting units 120b and 120c, and the relatively dense microstructure regions 1224 are farther from the light-emitting units 120b and 120c. The relatively sparse microstructure regions 1222 may be configured with scattering structures having a lower distribution density, and the relatively dense microstructure regions 1224 may be configured with scattering structures having a higher distribution density, where the scattering structures may be dot-patterns and / or line-patterns, depending on the actual application. Therefore, compared with the relatively sparse microstructure regions 1222 closer to the light-emitting units 120b and 120c, the relatively dense microstructure regions 1224 farther from the light-emitting units 120b and 120c can guide more light to emit upward. By setting the relatively dense microstructure regions 1224 and the relatively sparse microstructure regions 1222, both the single key 10 and the overall illuminated keyboard 1 can achieve highly uniform illumination. It should be noted that the shapes and densities of the relatively sparse microstructure regions 1222 and the relatively dense microstructure regions 1224 can be adjusted according to the actual application, and are not limited to the embodiments shown in the figures.
[0032] In this embodiment, a plurality of plate holes 140 in the bottom plate 14 may overlap with the relatively sparse microstructure regions 1222 and the relatively dense microstructure regions 1224. Thereby, the relatively sparse microstructure regions 1222 and the relatively dense microstructure regions 1224 can guide the light transmitted in the light guide plate 122 to emit upward through the plate holes 140 of the bottom plate 14. It should be noted that the areas of the relatively sparse microstructure regions 1222 and the relatively dense microstructure regions 1224 may be larger than, equal to, or smaller than the area of the plate holes 140, depending on the actual application.
[0033] Please refer to Figure 3 and Figure 4 , Figure 3 is a schematic diagram of the light-emitting unit 120 according to an embodiment of the present invention, Figure 4 is a schematic diagram of the light-emitting unit 120 according to another embodiment of the present invention.
[0034] In this embodiment, each light-emitting unit 120 may include a plurality of crystal grains, where the plurality of crystal grains are arranged in succession with their short sides facing each other, and the long sides of the plurality of crystal grains are arranged in succession along the length direction of the light-emitting unit. As Figure 3As shown, each light-emitting unit 120 may include two dies R and W, and the two dies R and W may provide two-color light (for example, red light and white light). In practical applications, the color lights of the two dies are determined according to actual requirements, and are not limited to the above embodiments. The two dies R and W are arranged in succession with their short sides facing each other, and the long sides of the two dies R and W are arranged in succession along the length direction of the light-emitting unit 120 to achieve a good light mixing effect. As Figure 4 shown, each light-emitting unit 120 may include three dies R, G, and B, and the three dies R, G, and B may provide three-color light (for example, red light, green light, and blue light). The three dies R, G, and B are arranged in succession with their short sides facing each other, and the long sides of the three dies R, G, and B are arranged in succession along the length direction of the light-emitting unit 120 to achieve a good light mixing effect.
[0035] In addition, the different-color dies of any two of the three light-emitting units 120 are arranged close to each other to make the light mixing effect of adjacent keys more uniform. As Figure 3 shown, the different-color dies R and W of any two of the three light-emitting units 120 are arranged close to each other. As Figure 4 shown, the different-color dies R and B of any two of the three light-emitting units 120 are arranged close to each other.
[0036] Please refer to Figure 5 , Figure 5 which is a partial schematic view of the light-emitting keyboard 1' according to another embodiment of the present invention.
[0037] As Figure 5 shown, in the light-emitting keyboard 1', three light-emitting units 120a, 120b, and 120c are arranged in a triangle to form a light-emitting area LA1, and three light-emitting units 120c, 120d, and 120e are arranged in a triangle to form a light-emitting area LA2. In this embodiment, each of the light-emitting units 120a, 120c, 120d, and 120e may overlap with the gap g between two adjacent keys 10, and the light-emitting unit 120b may also overlap with the keycap 100 of the key 10 (that is, the light-emitting unit 120b may be located below the keycap 100 of the key 10). In this embodiment, the long sides of the light-emitting units 120a, 120c, and 120e may be arranged parallel to the longitudinal Y direction of the light-emitting keyboard 1', and the long side of the light-emitting unit 120b may be arranged parallel to the transverse direction X of the light-emitting keyboard 1'. In addition, one of the three light-emitting units 120c, 120d, and 120e may be arranged obliquely relative to the other two of the three light-emitting units 120c, 120d, and 120e. In this embodiment, the light-emitting unit 120d may be arranged obliquely relative to the light-emitting units 120c and 120e. The present invention can adjust the position and orientation of the light-emitting unit according to actual light-emitting requirements.
[0038] In summary, in the present invention, three light-emitting units are arranged in a triangle with three light-emitting units as a unit, and the light-emitting area formed by the three light-emitting units can overlap with the projection areas of at least two keycaps. Thereby, the number of light-emitting units can be effectively reduced, and thus the power consumption and manufacturing cost can be lowered. In addition, on the connection line of at least two of the three light-emitting units of the light guide plate, two relatively sparse microstructure areas and at least one relatively dense microstructure area are provided, and at least one relatively dense microstructure area is located between the two relatively sparse microstructure areas. By providing the relatively dense microstructure area and the relatively sparse microstructure area, highly uniform light emission can be achieved for both a single key and the overall backlit keyboard.
[0039] Certainly, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and deformations according to the present invention. However, these corresponding changes and deformations should all fall within the protection scope of the appended claims of the present invention.
Claims
1. A luminous keyboard, characterized in that: The illuminated keyboard includes: A plurality of keys, each of the plurality of keys having a key cap; and A backlight module is located below the multiple keys and includes multiple light-emitting units. Three of the multiple light-emitting units are arranged in a triangle to form a light-emitting area, and the light-emitting area overlaps with the projection areas of at least two key caps.
2. A luminous keyboard, characterized in that: The illuminated keyboard includes: Multiple buttons; as well as A backlight module is located below the multiple keys, and the backlight module includes multiple light-emitting units and a light guide plate. Three of the multiple light-emitting units are arranged in a triangle. The light guide plate is provided with two relatively sparse microstructure areas and at least one relatively dense microstructure area on a connecting line of at least two of the three light-emitting units. The two relatively sparse microstructure areas are respectively adjacent to the at least two light-emitting units, and the at least one relatively dense microstructure area is located between the two relatively sparse microstructure areas.
3. The luminous keyboard according to claim 1, characterized in that: A connecting line of at least two of the three light-emitting units overlaps with projection areas of at least two key caps.
4. The luminous keyboard according to claim 1, characterized in that: The backlight module also includes a light guide plate, which is provided with two relatively sparse microstructure areas and at least one relatively dense microstructure area on the connecting line of at least two of the three light-emitting units. The two relatively sparse microstructure areas are respectively adjacent to the at least two light-emitting units, and the at least one relatively dense microstructure area is located between the two relatively sparse microstructure areas.
5. The luminous keyboard according to claim 2, characterized in that: The plurality of keys respectively have key caps, and a connection line of at least two of the three light emitting units overlaps with a projection area of at least two key caps.
6. The luminous keyboard according to claim 1 or 2, characterized in that: At least one of the three light emitting units overlaps with a gap between two adjacent keys.
7. The luminous keyboard according to claim 6, characterized in that: The luminous keyboard also includes a bottom plate, which is located between the multiple keys and the backlight module. The bottom plate has a plurality of plate holes, and the plurality of plate holes overlap with the two relatively sparse microstructure areas and the at least one relatively dense microstructure area.
8. The luminous keyboard according to claim 1 or 2, characterized in that: Each light-emitting unit includes a plurality of crystal grains, and the plurality of crystal grains are arranged in series with their short sides facing each other.
9. The luminous keyboard according to claim 1 or 2, characterized in that: Each light-emitting unit includes a plurality of crystal grains, and the long sides of the plurality of crystal grains are arranged successively along the length direction of the light-emitting unit.
10. The luminous keyboard according to claim 1 or 2, characterized in that: One of the three light emitting units is arranged obliquely relative to the other two of the three light emitting units.
11. The luminous keyboard according to claim 1 or 2, characterized in that: The different color crystal grains of any two light emitting units among the three light emitting units are arranged close to each other.
12. The luminous keyboard according to claim 1 or 2, characterized in that: Two adjacent keys in the longitudinal direction of the luminous keyboard are offset in the transverse direction of the luminous keyboard.
13. A backlight module, characterized in that: The backlight module includes: A plurality of light-emitting units, three of the plurality of light-emitting units being arranged in a triangle; as well as A light guide plate, wherein two relatively sparse microstructure areas and at least one relatively dense microstructure area are arranged on a line connecting at least two of the three light-emitting units, wherein the two relatively sparse microstructure areas are respectively adjacent to the at least two light-emitting units, and the at least one relatively dense microstructure area is located between the two relatively sparse microstructure areas.