Illuminated button structure

Abstract

The present invention discloses a light-emitting key structure, which includes a keycap that can be moved vertically and a plurality of light-emitting crystals arranged under the keycap. The keycap has a heterochromatic sensitive area in the vertical coverage area. The respective distances of the plurality of light-emitting crystals to the heterochromatic sensitive area are close to each other. In one embodiment, the heterochromatic sensitive area is the end of a light-transmitting indication area of ​​the keycap, the light-transmitting indication area has a length direction, and the plurality of light-emitting crystals are arranged perpendicular to the length direction and the vertical direction below the light-transmitting indication area and are located on the same side of the projection of the heterochromatic sensitive area in the vertical direction. In another embodiment, the heterochromatic sensitive area is a gap projection between two brackets for supporting the keycap, and the plurality of light-emitting crystals as a whole do not overlap with the gap projection.

Description

Technical Field

[0001] The invention relates to a key structure, and in particular to a luminous key structure. Background Art

[0002] One-to-one illuminated keys usually have a light source under each keycap, which is used to emit light to form a backlight. When the keycap has a light-transmitting area corresponding to a character such as text or a symbol, the corresponding light source is usually set directly against the character and emits light toward the character. In actual products, there are often other components between the light source and the light-transmitting area of ​​the keycap, such as a bracket, a base plate, a circuit board, etc., which interfere with the light transmission path and cause uneven color of the keycap characters. In the case where the light source has multiple colors, serious color deviation problems may also occur. Summary of the invention

[0003] In view of the problems in the prior art, the present invention aims to provide a light-emitting key structure, which suppresses the influence of different color sensitive areas on the light mixing emitted by the light-emitting crystal particles by making the distances between the multiple light-emitting crystal particles and the different color sensitive areas close to each other.

[0004] In order to achieve the above-mentioned purpose, the present invention proposes a light-emitting key structure, which includes a keycap and a plurality of light-emitting crystals. The keycap is movably arranged along the vertical direction, and the keycap has a heterochromatic sensitive area in the coverage range of the vertical direction; a plurality of light-emitting crystals are arranged under the keycap, and the plurality of light-emitting crystals emit light of different colors upward to illuminate the keycap, and the respective distances of the plurality of light-emitting crystals to the heterochromatic sensitive area are close to each other; wherein the heterochromatic sensitive area is the end of the light-transmitting indication area of ​​the keycap, the light-transmitting indication area has a length direction, and the plurality of light-emitting crystals are arranged perpendicular to the length direction and the vertical direction and below the light-transmitting indication area, and the plurality of light-emitting crystals are located on the same side of the projection of the heterochromatic sensitive area in the vertical direction.

[0005] As an optional technical solution, the light-transmissive indicating area defines a long axis and a short axis, the long axis is parallel to the length direction, and the entirety of the plurality of light-emitting crystal particles passes through the center point of the short axis.

[0006] As an optional technical solution, the light-transmissive indicating area defines a long axis and a short axis, the long axis is parallel to the length direction, and the center of the plurality of light-emitting crystal particles as a whole is located at the center point of the long axis.

[0007] As an optional technical solution, the light-transmissive indication area includes a plurality of light-transmissive characters, the plurality of light-transmissive characters are arranged along the length direction, and the heterochromatic sensitive area is the endmost one of the plurality of light-transmissive characters.

[0008] In the luminous key structure of the present invention, the keycap has a heterochromatic sensitive area in the vertical direction, and the heterochromatic sensitive area is, for example, the end of the light-transmitting indication area of ​​the keycap, and the plurality of light-emitting crystals are located on the same side of the projection of the heterochromatic sensitive area in the vertical direction. Thus, since the distances between the plurality of light-emitting crystals and the end of the light-transmitting indication area are close, the different colored lights emitted by the plurality of light-emitting crystals travel to the end of the light-transmitting indication area at a close distance, thereby suppressing the degree of uneven light mixing and color deviation.

[0009] In order to achieve the above-mentioned purpose, the present invention also proposes another luminous key structure, which includes a first bracket, a second bracket, a keycap and a plurality of luminous grains. The second bracket is arranged relative to the first bracket; the keycap is supported on the first bracket and the second bracket and can be moved in a vertical direction via the first bracket and the second bracket, and the keycap has a heterochromatic sensitive area in the coverage range in the vertical direction; a plurality of luminous grains are arranged under the keycap, and the plurality of luminous grains emit light of different colors upward to illuminate the keycap, and the respective distances of the plurality of luminous grains to the heterochromatic sensitive area are close to each other; wherein the heterochromatic sensitive area is a projection of the gap between the first bracket and the second bracket, and the entirety of the plurality of luminous grains does not overlap with the projection of the gap.

[0010] As an optional technical solution, the multiple light-emitting crystals are arranged below the first bracket, and the light emitted upward by the multiple light-emitting crystals correspondingly passes through the first bracket to illuminate the keycap; or, the multiple light-emitting crystals are arranged below the second bracket, and the light emitted upward by the multiple light-emitting crystals correspondingly passes through the second bracket to illuminate the keycap.

[0011] As an optional technical solution, when the multiple light-emitting crystal grains are arranged below the first bracket, the multiple light-emitting crystal grains are arranged along the arrangement direction, the first bracket has a frame portion, the projection of the frame portion in the vertical direction has a length direction, and the length direction is parallel to the arrangement direction; when the multiple light-emitting crystal grains are arranged below the second bracket, the multiple light-emitting crystal grains are arranged along the arrangement direction, the second bracket has a frame portion, the projection of the frame portion in the vertical direction has a length direction, and the length direction is parallel to the arrangement direction.

[0012] As an optional technical solution, when the multiple light-emitting crystal grains are arranged below the first bracket, the light enters the first bracket from the lower surface of the first bracket and is emitted from the upper surface of the first bracket, and the lower surface is parallel to the upper surface; when the multiple light-emitting crystal grains are arranged below the second bracket, the light enters the second bracket from the lower surface of the second bracket and is emitted from the upper surface of the second bracket, and the lower surface is parallel to the upper surface.

[0013] As an optional technical solution, the keycap has a light-transmitting indication area, and the first bracket and the second bracket are pivotally connected to each other along a pivot axis, and the pivot axis is parallel to the length direction of the light-transmitting indication area.

[0014] As an optional technical solution, the luminous key structure further includes a base plate, wherein the keycap is arranged above the base plate, the base plate has a through hole, the multiple light-emitting grains are located within the projection of the through hole in the vertical direction, and the multiple light-emitting grains are arranged along an arrangement direction, and the arrangement direction is parallel to the hole edge of the through hole.

[0015] In the luminous key structure of the present invention, the key cap has a heterochromatic sensitive area in the vertical direction, and the heterochromatic sensitive area is, for example, the gap projection between the first bracket and the second bracket of the key cap, and the whole of the plurality of luminous crystals does not overlap with the gap projection. Thus, the different colored lights emitted by the plurality of luminous crystals travel along similar paths, so as to suppress the influence of the gap projection on the light mixing.

[0016] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments, but is not intended to limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. 4 is a schematic diagram of a light-emitting key structure according to an embodiment.

[0018] Figure 2 for Figure 1 Exploded view of the illuminated button structure.

[0019] Figure 3 for Figure 1 A cross-sectional view of the luminous key structure along line XX.

[0020] Figure 4A for Figure 2 A schematic diagram of the top view configuration of the switch circuit board and the light-emitting chip in the part of the light-emitting key structure.

[0021] Figure 4B for Figure 4A A top view schematically showing another embodiment of the present invention.

[0022] Figure 4C for Figure 4A A top view schematically showing another embodiment of the present invention.

[0023] Figure 5 for Figure 4A A schematic top view of the configuration of the switch contacts and the light-emitting chip according to another embodiment.

[0024] Figure 6 for Figure 4A A schematic top view of the configuration of the switch contacts and the light-emitting chip according to another embodiment.

[0025] Figure 7 for Figure 1 A top view of the illuminated key structure.

[0026] Figure 8 The diagram is a top view of a portion of a switch circuit board and a light-emitting chip according to an embodiment.

[0027] Fig. 9 For the corresponding Figure 8 A cross-sectional view of the embodiment along line YY.

[0028] Fig.10 FIG. 4 is an exploded view of a light-emitting key structure according to another embodiment.

[0029] Fig.11A for Fig.10 A top view of the middle illuminated key structure with the keycaps removed.

[0030] Fig. 11B for Fig.11A A top view of another embodiment is shown.

[0031] Fig.12 for Fig.10 The cross-sectional view of the luminous key structure in FIG. Fig.10 The position is shown by the midline ZZ.

[0032] Fig.13A for Fig.10 A top view of the illuminated key structure.

[0033] Fig. 13B for Fig.13A A top view of another embodiment is shown. DETAILED DESCRIPTION

[0034] In order to provide a further understanding of the purpose, structure, features, and functions of the present invention, the following detailed description is given in conjunction with the embodiments.

[0035] See also Figures 1 to 3 . Figure 1 FIG. 4 is a schematic diagram of a light-emitting key structure according to an embodiment. Figure 2 for Figure 1 Exploded view of the illuminated button structure. Figure 3 for Figure 1A cross-sectional view of the illuminated key structure along line XX. According to an embodiment of the illuminated key structure 1, the key cap 12 includes a base plate 14, a first bracket 16, a second bracket 18, a transparent switch circuit board 20, and one or more light-emitting crystals (for example, but not limited to, three light-emitting crystals 22a, 22b, 22c, the light-emitting crystals are used to emit light of different colors, such as red light, green light, and blue light; and the light-emitting crystals 22a, 22b, 22c can be made of, but not limited to, light-emitting diodes). The key cap 12 is disposed above the base plate 14, and the first bracket 16 and the second bracket 18 are both connected between the key cap 12 and the base plate 14 to support the key cap 12 and enable the key cap 12 to move along a vertical direction D1 (indicated by a double-headed arrow in Figure 1 , Figure 3 The switch circuit board 20 is placed on the bottom plate 14 (i.e., below the keycap 12). The light-emitting crystals 22a, 22b, and 22c are disposed below the switch circuit board 20, for example, fixed on a light source circuit board 24 (the light source circuit board 24 is, for example, but not limited to, a flexible printed circuit board) located below the bottom plate 14. The bottom plate 14 forms corresponding through holes 142 to expose the light-emitting crystals 22a, 22b, and 22c. In actual operation, the light-emitting crystals 22a, 22b, and 22c can partially or completely enter the through holes 142. The circuit of the switch circuit board 20 (part of which is shown in dotted lines) Figure 2 ) The light emitting crystal particles 22 a , 22 b , 22 c are not shielded, so that the light emitted upward by the light emitting crystal particles 22 a , 22 b , 22 c can pass through the switch circuit board 20 to illuminate the key cap 12 .

[0036] In this embodiment, the switch circuit board 20 can be made of a thin film circuit board, which is usually made of three layers of transparent sheets stacked together, wherein the upper and lower transparent sheets form the required circuits, and the middle transparent sheet provides the required insulation effect of the circuit. The circuit of the switch circuit board 20 includes a switch contact 202 and a plurality of wire segments (whose outline is hidden in FIG. Figure 2 The light-emitting key structure 1 uses a light-transmissive elastic protrusion 26 as a restoring element. The elastic protrusion 26 is aligned with the switch contact 202 and is disposed on the switch circuit board 20 and covers the switch contact 202 and the light-emitting crystal grains 22a, 22b, 22c in the vertical direction D1. The keycap 12 can be pressed (for example, by a user's finger) to squeeze the elastic protrusion 26 downward, thereby triggering the switch contact 202. After the external force applied to the keycap 12 is removed (for example, the user removes his finger from the keycap 12), the squeezed elastic protrusion 26 can return to its original state to push the keycap 12 upward to return to its original position.

[0037] See also Figure 4A , Figure 4A for Figure 2FIG. 2 is a top view of the switch circuit board and the light-emitting chips of the light-emitting key structure. The circuit of the switch circuit board 20 and the hidden outlines of the light-emitting chips 22a, 22b, and 22c are all drawn with solid lines. The switch contact 202 has a non-circular outline, such as but not limited to a flattened circular outline, and the flattened circular outline has a flat edge 202a. The light-emitting chips 22a, 22b, and 22c are arranged along an arrangement direction D2 (indicated by a double-headed arrow in FIG. 2 ). Figure 4A The arrangement direction D2 is parallel to the flat edge 202a. The light-emitting chips 22a, 22b, 22c and the switch contact 202 have a light-emitting spacing d1 in a horizontal direction D3 (indicated by a double-headed arrow in the figure) (i.e., the distance from the projection of the edge of the light-emitting range of the light-emitting chips 22a, 22b, 22c on the switch circuit board 20 to the flat edge 202a). In principle, the farther the light-emitting chips 22a, 22b, 22c are from the switch contact 202, the less likely the switch contact 202 will shield the light emitted by the light-emitting chips 22a, 22b, 22c; in actual operation, this light-emitting spacing d1 can be designed to be between 0.3mm and 0.5mm. Furthermore, in this embodiment, the flattened circular profile has a center 202b and a radius 202c, and the ratio of the distance 202d from the center 202b to the flat edge 202a to the radius 202c is greater than 0.5. In principle, the switch contact 202 can maintain acceptable contact conduction properties.

[0038] refer to Figure 4B and Figure 4C , Figure 4B and Figure 4C Both Figure 4A As shown in the top view of another embodiment, the through hole 142' of the bottom plate 14 (whose outline projection is shown in the figure with dotted lines) has a portion of the arc edge parallel to the arc edge of the switch contact 202, and the other side consists of three edges perpendicular to each other, forming a bullet-shaped through hole 142' as a whole. Figure 4B In the embodiment, all the light-emitting crystal particles 22a, 22b, and 22c are arranged along an arrangement direction D2. The light-emitting crystal particles 22a, 22b, and 22c are not only adjacent to the flat edge 202a of the switch contact 202, but also adjacent to the straight hole edge 142a' of the through hole 142' of the bottom plate 14. At this time, the appropriate configuration is that the arrangement direction D2 of the light-emitting crystal particles 22a, 22b, and 22c is parallel (or approximately parallel) to the hole edge 142a' of the through hole 142' of the bottom plate 14, and is also parallel (or approximately parallel) to the flat edge 202a of the switch contact 202. Figure 4CIn the embodiment, the light-emitting crystal grains 22a, 22b, and 22c are arranged in a triangle, the light-emitting crystal grain 22a faces the straight hole edge 142a' of the through hole 142' of the bottom plate 14, and the light-emitting crystal grains 22b and 22c are arranged in a straight line along an arrangement direction D2. At this time, the arrangement directions of at least two light-emitting crystal grains 22b and 22c are parallel (or substantially parallel) to the straight hole edge 142a' of the through hole 142' of the bottom plate 14, and are also parallel (or substantially parallel) to the flat edge 202a of the switch contact 202. However, the implementation is not limited to this. For example, at least two light-emitting crystal grains 22b and 22c may also be arranged along the horizontal direction D3, so that the arrangement directions of at least two light-emitting crystal grains 22b and 22c are perpendicular (or substantially perpendicular) to the straight hole edge 142a' of the through hole 142' of the bottom plate 14, and are also perpendicular (or substantially perpendicular) to the flat edge 202a of the switch contact 202, but parallel to the horizontal direction D3. In another embodiment, Figure 4B and 4C The three vertical edges of the bullet-shaped through hole 142' of the bottom plate 14 can be reduced as needed to become a key-shaped through hole 142' with a circular arc at one end and a narrow and long end; at this time, all or at least two of the light-emitting crystal particles 22a, 22b, 22 can be arranged in a straight line perpendicular to the flat side 202a of the switch contact 202 and the hole edge 142a' at the end.

[0039] The hole edge 142a' of the through hole 142' of the aforementioned bottom plate 14 and the flat edge 202a of the switch contact 202 are both heterochromatic sensitive areas, which may cause heterochromatic problems such as uneven light mixing and color deviation. Therefore, the aforementioned technical solutions all arrange the plurality of light-emitting crystal grains 22a, 22b, and 22c on the same side of the heterochromatic sensitive areas, that is, the light-emitting crystal grains 22a, 22b, and 22c are arranged on the same side of the hole edge 142a' of the through hole 142' of the bottom plate 14, and / or the light-emitting crystal grains 22a, 22b, and 22c are arranged on the same side of the flat edge 202a of the switch contact 202, and the respective distances of the plurality of light-emitting crystal grains 22a, 22b, and 22c to the same heterochromatic sensitive area are close to each other. Since the manufacturing technology of the light-emitting crystal grains 22a, 22b, and 22c has reached the millimeter or even micrometer level, even if the light-emitting crystal grains 22a, 22b, and 22c are not arranged in a straight line, the distances to the same heterochromatic sensitive area are very close to each other. For the sake of clarity, the multiple light-emitting crystal grains in the various figures of the present invention are drawn in a larger size, and the multiple light-emitting crystal grains are spaced relatively large from each other. The actual ratio of the multiple light-emitting crystal grains is much smaller than the various figures in the present invention.

[0040] In addition, in actual operation, the switch contacts of the switch circuit board 20 may have different shapes. Figure 5As shown, the switch contact 203a according to one embodiment includes a peripheral portion 2032a, a central portion 2034a located inside the peripheral portion 2032a, and two connecting portions 2036a. The two connecting portions 2036a are located on opposite sides of the central portion 2034a and connect the peripheral portion 2032a and the central portion 2034a. The peripheral portion 2032a extends incompletely along a circular path (indicated by a dotted line in the figure) and is C-shaped. The central portion 2034a has a circular profile. The light-emitting crystal grains 22a, 22b, and 22c are located between the two ends of the peripheral portion 2032a (i.e., located at the C-shaped opening), and the circular path passes through the light-emitting crystal grains 22a, 22b, and 22c (i.e., the light-emitting crystal grains 22a, 22b, and 22c are arranged on the circular path). The light-emitting crystal grains 22a, 22b, and 22c are closer to the central portion 2034a and have a light-emitting spacing d1a therebetween; similarly, in actual operation, the light-emitting spacing d1a can be designed to be between 0.3 mm and 0.5 mm. If the light-emitting crystal grains 22a, 22b, and 22c are closer to the two ends of the peripheral portion 2032a and have a light-emitting spacing d1a' therebetween; similarly, in actual operation, the light-emitting spacing d1a' can also be designed to be between 0.3 mm and 0.5 mm.

[0041] For example, Figure 6 As shown, according to one embodiment, the switch contact 203b includes a peripheral portion 2032b, a central portion 2034b located inside the peripheral portion 2032b, and a connecting portion 2036b. The connecting portion 2036b connects the peripheral portion 2032b and the central portion 2034b. The peripheral portion 2032b extends incompletely along a convex polygonal path (for example, but not limited to a pentagonal path, represented by a dotted line in the figure) and is slightly C-shaped. The central portion 2034b has a convex polygonal profile (for example, but not limited to a quadrilateral). The convex polygonal path passes through the light-emitting crystal grains 22a, 22b, and 22c. The light-emitting crystal grains 22a, 22b, and 22c are closer to the central portion 2034b and have a light-emitting spacing d1b with the central portion 2034b; similarly, in actual operation, this light-emitting spacing d1b can be designed to be between 0.3 mm and 0.5 mm. If the light emitting crystal grains 22a, 22b, and 22c are closer to the outer portion 2032b and have a light emitting distance d1b' between them and the outer portion 2032b, similarly, in actual operation, the light emitting distance d1b' can also be designed to be between 0.3 mm and 0.5 mm. Figure 5 and Figure 6 In the actual operation, the convex polygonal path may also be a triangular path, a hexagonal path, etc.; the outline of the central portion 2034a, 2034b may also be other convex polygonal outlines, such as a triangular outline, a hexagonal outline, etc.

[0042] See also Figures 1 to 3In this embodiment, the keycap 12 has a light-transmitting indication area 12a (shown in the figure as a dotted frame), and the light emitted by the light-emitting crystal particles 22a, 22b, and 22c can pass through the light-transmitting indication area 12a to form a visual indication effect. In actual operation, the light-transmitting indication area 12a can be numbers, symbols, letters, text, graphics, or a combination thereof; in other words, the light-transmitting indication area 12a can include a plurality of light-transmitting characters, and the light-transmitting characters can be numbers, symbols, letters, text, or graphics.

[0043] See also Figure 7 (The hidden outlines of the light-emitting crystal particles 22a, 22b, and 22c are shown with thin solid lines). Figure 7 for Figure 1 In this embodiment, the light-transmissive indication area 12a has a length direction 12b (e.g., the direction of letter arrangement in the figure, indicated by a double-headed arrow). Figure 7 ). The light-emitting crystals 22a, 22b, and 22c are arranged perpendicular to the length direction 12b below the light-transmitting indication area 12a (i.e., the arrangement direction D2 is perpendicular to the length direction 12b), thereby reducing or eliminating the effect of uneven light mixing caused by the staggered arrangement of the light-emitting crystals 22a, 22b, and 22c on the light-transmitting indication area 12a. In other words, the two ends of the light-transmitting indication area 12a (and the light-transmitting indication area 12a' of the subsequent embodiments) are heterochromatic sensitive areas, which are prone to uneven light mixing and cause color difference problems when the keycap 12 emits light. The light-transmitting indication area 12a may include a plurality of light-transmitting characters, and the plurality of light-transmitting characters are arranged along a long axis, and the so-called heterochromatic sensitive areas are the end characters on both sides of the plurality of light-transmitting characters.

[0044] In addition, in this embodiment, the light-transmissive indication area 12a is rectangular, and a major axis 12c and a minor axis 12d (both indicated by dotted lines) can be defined thereon. Figure 7 ), the major axis 12c is parallel to the length direction 12b, and the minor axis 12d is perpendicular to the length direction 12b. The light-transmissive indication area 12a is structurally symmetrical with respect to the major axis 12c and the minor axis 12d, respectively. In terms of vertical projection, the light-emitting crystal particles 22a, 22b, and 22c as a whole (i.e., multiple light-emitting crystal particles as a whole, the same below) pass through the major axis 12c, and the center of the light-emitting crystal particles 22a, 22b, and 22c as a whole (in this embodiment, the light-emitting crystal particle 22b) is located on the major axis 12c. In actual operation, the light-emitting crystal particles 22a, 22b, and 22c can also be designed to pass through the center of the major axis 12c as a whole, such as Figure 7As shown in the dashed box; at this time, the light-emitting crystal particles 22a, 22b, and 22c as a whole also pass through the center of the short axis 12d, and the center of the light-emitting crystal particles 22a, 22b, and 22c as a whole (in this embodiment, the light-emitting crystal particle 22b) is also located at the center of the long axis 12c and the short axis 12d; but it is not limited to this. For example, the light-emitting crystal particles 22a, 22b, and 22c are offset parallel to the short axis 12d, so that the center of the light-emitting crystal particles 22a, 22b, and 22c as a whole deviates from the center of the long axis 12c and the short axis 12d (for example, the light-emitting crystal particles 22a or 22c are located at the center of the long axis 12c and the short axis 12d; for another example, the light-emitting crystal particles 22a, 22b, and 22c are not located at the center of the long axis 12c and the short axis 12d, such as Figure 7 In addition, in the luminous key structure 1, although the luminous crystal grains 22a, 22b, and 22c are arranged in a straight line, they can also be arranged in a non-linear manner in actual operation, such as a triangular configuration; at this time, when the luminous crystal grains 22a, 22b, and 22c can be close enough (this can be obtained through actual product testing), the influence of the uneven light mixing caused by the excessive arrangement spacing of the luminous crystal grains 22a, 22b, and 22c on the light-transmissive indication area 12a can also be reduced or eliminated. Each technical solution of this embodiment is to set multiple luminous crystal grains 22a, 22b, and 22c on the same side of the different color sensitive area, that is, the luminous crystal grains 22a, 22b, and 22c are simultaneously set on the same side of the last character of multiple light-transmissive characters. For the last character "L", the light-emitting crystal grains 22a, 22b, and 22c are simultaneously arranged on the same side of the last character "L"; and for the last character "d" on the other side, the plurality of light-emitting crystal grains 22a, 22b, and 22c are also located on the same side of the last character "d". For the last character "L", which is a heterochromatic sensitive area, the arrangement direction of the light-emitting crystal grains 22a, 22b, and 22c is at least partially perpendicular to the light-transmissive indication area 12a, so that the respective distances to the same heterochromatic sensitive area (the last character "L") are close to each other, which can reduce the heterochromatic problem. Similarly, for the last character "d", which is a heterochromatic sensitive area, the arrangement direction of the light-emitting crystal grains 22a, 22b, and 22c is at least partially perpendicular to the light-transmissive indication area 12a, so that the respective distances to the same heterochromatic sensitive area (the last character "d") are close to each other, which can also reduce the heterochromatic problem.

[0045] In the present invention, the keycap 12 has a heterochromatic sensitive area in the range covered in the vertical direction D1, and the heterochromatic sensitive area is, for example, the end of the light-transmitting indication area 12a of the keycap 12, and the plurality of light-emitting crystals 22a, 22b, and 22c are located on the same side of the projection of the heterochromatic sensitive area 12a in the vertical direction D1. Since the distances from the plurality of light-emitting crystals 22a, 22b, and 22c to the end of the light-transmitting indication area 12a are close, the different colored lights emitted by the plurality of light-emitting crystals 22a, 22b, and 22c can travel to the end of the light-transmitting indication area 12a at a similar distance, thereby suppressing the influence caused by uneven light mixing and color deviation.

[0046] In the luminous key structure 1, the switch contact 202 is roughly located in the central area, but it is not limited to this in actual operation. For example, the switch contact 202 is set away from the central area and is triggered by the keycap 12 (such as a downwardly protruding structure) or the bracket (the first bracket 16 or the second bracket 18). At this time, the light-emitting crystal grains 22a, 22b, and 22c can be separated from the elastic protrusion 26, so that the light emitted by the light-emitting crystal grains 22a, 22b, and 22c does not need to pass through the elastic protrusion 26, which can reduce the attenuation of light intensity. In addition, the circuit of the switch circuit board 20 generally refers to a collection of multiple wires (traces) and multiple circuit elements (circuit elements) (such as the aforementioned switch contact 202), all of which are objects that the light-emitting crystal grains 22a, 22b, and 22c need to avoid. Specifically, in the luminous key structure 1 , the luminous chips 22 a , 22 b , 22 c are closer to the switch contact 202 than other parts of the circuit; however, in actual operation, the luminous chips 22 a , 22 b , 22 c may also be closer to other parts of the circuit than the switch contact 202 .

[0047] For example, in another embodiment, Figure 8 As shown in the figure (where the hidden outline of the circuit of the switch circuit board 20 is drawn with thin solid lines), the light-emitting chips 22a, 22b, and 22c are arranged near the wire segment 204. The wire segment 204 extends in a straight line, and the arrangement direction D2' of the light-emitting chips 22a, 22b, and 22c is parallel to the wire segment 204. There is a light-emitting distance d2 between the light-emitting chips 22a, 22b, and 22c and the wire segment 204 in the horizontal direction D3' (that is, the distance from the projection of the edge of the light-emitting range of the light-emitting chips 22a, 22b, and 22c on the switch circuit board 20 to the wire segment 204). In actual operation, this light-emitting distance d2 can also be designed to be between 0.3mm and 0.5mm.

[0048] In actual operation, the switch circuit board 20 may also be arranged under the base plate 14 as needed. In this case, the switch circuit board 20 is closer to the light-emitting chips 22a, 22b, and 22c of the lowest layer and blocks a larger light-emitting range. It is necessary to avoid the circuit away from the switch circuit board 20 to a greater extent. For the circuit elements (such as the switch contacts 202) or the wires (such as the wire segments 204) constituting the circuit, the appropriate light-emitting spacings d1 and d2 may exceed the above-mentioned higher critical value of 0.5mm. In some actual production examples, the appropriate light-emitting spacings d1 and d2 are 0.59mm, 0.66mm, and 0.78mm. When the circuit of the switch circuit board 20 is far away from the light-emitting crystal grains 22a, 22b, and 22c, for example, when a thicker base plate 14 is used, or when the light-emitting key structure 1 has other structural parts (such as a moving plate, magnet, boss, etc. used for magnetic resetting or sinking keyboards), the appropriate light-emitting spacings d1 and d2 may be lower than the lower critical value; for example, in some actual manufacturing examples, the appropriate light-emitting spacings d1 and d2 are 0.27mm, 0.23mm, and 0.17mm. Therefore, based on the experimental data of different models, the light-emitting spacings d1 and d2 are preferably within the range of 0.17mm to 0.78mm.

[0049] Furthermore, the switch contacts 202 may be printed on the upper and lower transparent films of the switch circuit board 20 respectively, and the upper and lower switch contacts 202 may have different patterns and outer diameters. The light-emitting crystal particles 22a, 22b, and 22c usually need to avoid the outermost edges of the upper and lower switch contacts 202 of the switch circuit board 20, that is, the aforementioned light-emitting spacing d1 must be based on the overall outer contour of the upper and lower switch contacts 202.

[0050] Also, see Fig. 9 , Fig. 9 For the corresponding Figure 8 A cross-sectional view of the embodiment along line YY. In this example, the switch circuit board 20 has a through hole 206, and the light-emitting crystal particles 22a, 22b, and 22c are arranged opposite to the through hole 142" of the bottom plate 14 and opposite to the through hole 206, so that the light emitted upward by the light-emitting crystal particles 22a, 22b, and 22c can pass through the through hole 142" and the through hole 206 to illuminate the keycap 12, which can eliminate the intensity attenuation caused by the light passing through the physical structure of the switch circuit board 20. Figure 4A In the configuration shown, if the structural design allows, the switch circuit board 20 may also form a through hole facing the light-emitting chips 22 a , 22 b , 22 c near the switch contact 202 to reduce light intensity attenuation.

[0051] In addition, in this embodiment, all the light-emitting crystals 22a, 22b, and 22c used to provide backlight for the keycap 12 are arranged in a straight line parallel to the flat edge 202a, but this is not limited to the actual operation. For example, the light-emitting crystals 22a, 22b, and 22c are arranged in other arrangements (such as arcs, triangles, polygons, arrays, etc.), and the distance between the light-emitting crystal 22a, 22b, or 22c closest to the switch contact 202 and the switch contact 202 in the horizontal direction D3 is defined as the light-emitting spacing. Similarly, the contour of the switch contact 202 close to the light-emitting crystals 22a, 22b, and 22c is not limited to a straight line, and the wire segment 204 close to the light-emitting crystals 22a, 22b, and 22c is not limited to a straight line. The closer the light-emitting chips 22a, 22b, 22c are disposed to the circuit, the larger the range in which the light-emitting chips 22a, 22b, 22c can be disposed, that is, the greater the design flexibility of the light-transmissive indication area 12a.

[0052] See also Fig.10 and Fig.11A , shows an illuminated key structure 3 according to another embodiment, which is similar to the illuminated key structure 1. The illuminated key structure 3 uses the same element symbols as the illuminated key structure 1 in principle. For other descriptions of the illuminated key structure 3, please refer to the related descriptions of the same named components and their variations in the illuminated key structure 1 above. In the illuminated key structure 3, the first bracket 16 and the second bracket 18 are arranged opposite to each other and are light-transmissive, and are connected to the bottom side of the keycap 12 and the top side of the bottom plate 14.

[0053] When the keycap 12 is not pressed, the light-transmissive first bracket 16 and the second bracket 18 are X-shaped scissor-leg support brackets in an extended state (such as Fig.10 Shown or See Figure 3 ). In other words, the light emitted by the light-emitting crystal particles 22a, 22b, and 22c located below the bottom plate 14 has different transmission paths and incident / reflection / refraction angles from different surfaces of the inclined upper half and the inclined lower half, as well as the upper end and the lower end of the first bracket 16 and the second bracket 18. The junction of the first bracket 16 and the second bracket 18 belongs to the heterochromatic sensitive area, or in other words, the vertical range covering the gap projection G is the heterochromatic sensitive area, which is prone to uneven light mixing and causes color difference problems when the light is emitted to the keycap 12. If a monochromatic light source is placed in the gap projection G range between the first bracket 16 and the second bracket 18 (indicated by dotted hatching in Fig.11AIn the projection of the gap between the first bracket 16 and the second bracket 18 in the vertical direction D1), the light will be transmitted directly or indirectly to the keycap 12 through different parts of the first bracket 16 and the second bracket 18, which will eventually cause serious uneven illumination. If a multi-color light source such as the light-emitting crystal particles 22a, 22b, and 22c are placed within the projection range of the gap G (or overlapped with the projection range of the gap G), the uneven light mixing will cause different color deviations at different positions on the keycap 12.

[0054] Therefore, in this embodiment, all the light-emitting crystal particles 22a, 22b, 22c (in Fig.11A , its hidden outline is drawn with a thick solid line) are all arranged below the first bracket 16 (that is, the light-emitting crystals 22a, 22b, 22c are all located within the projection range of the first bracket 16 in the vertical direction D1) and are located in the through hole 144 (or facing the through hole 144 of the bottom plate 14 and located below the bottom plate; that is, the light-emitting crystals 22a, 22b, 22c are located within the projection range of the through hole 144 in the vertical direction D1). The light emitted by the light-emitting crystals 22a, 22b, 22c travels upward from the through hole 144 and passes through the first bracket 16 (or passes through the through hole 144 and the first bracket 16) to illuminate the keycap 12. Since the light emitted by the light-emitting crystals 22a, 22b, 22c passes through the same bracket, in principle, the light is subject to very similar influences (such as intensity attenuation, path divergence or deviation, etc.), thereby suppressing the degree of color deviation that may occur after the light passes through the structural member. Furthermore, in this embodiment, the light emitted by the light-emitting crystal grains 22a, 22b, and 22c enters the first bracket 16 from the lower surface 162 of the first bracket 16, and is emitted from the first bracket 16 from the upper surface 164 of the first bracket 16. The lower surface 162 is parallel to the upper surface 164. This structural configuration also helps to suppress the degree of color deviation that may occur after the light passes through the structural member. Similarly, in actual operation, the light-emitting crystal grains 22a, 22b, and 22c can also be changed to be arranged below the second bracket 18, such as Fig.11AIn this way, as long as the gap projection G between the first bracket 16 and the second bracket 18 (ie, the projection area of ​​the gap between the first bracket 16 and the second bracket 18 in the vertical direction) does not overlap with the light-emitting chips 22a, 22b, 22c, the aforementioned color shift problem can be avoided. The aforementioned situation that the gap projection G of the first bracket 16 and the second bracket 18 does not overlap with the light-emitting crystal grains 22a, 22b, 22c not only means that the gap projection G does not directly overlap any light-emitting crystal grain 22a, 22b, 22c itself, but also includes the situation that the gap projection G does not pass through the gap between any two adjacent light-emitting crystal grains 22a / 22b, 22b / 22c (that is, the gap projection G does not overlap or pass through the entirety of the light-emitting crystal grains 22a, 22b, 22c, and the entirety of the light-emitting crystal grains 22a, 22b, 22c can be logically represented by a single convex polygonal area that can cover all the light-emitting crystal grains 22a, 22b, 22c, for example, the light-emitting crystal grains 22a, 22b, 22c are not arranged in a straight line (such as Fig.11A The dotted box in the middle shows that the whole can be composed of a convex hexagonal area (such as Fig.11A The arrangement of the light-emitting crystal particles 22a', 22b', 22c' and the gap projection G may also have a specific relative relationship with each other, provided that the gap projection G does not overlap or pass through the entirety of the light-emitting crystal particles 22a', 22b', 22c'. For example, Fig.11A At least two of the dotted light-emitting crystal particles 22a', 22b', 22c' in the triangle arrangement are arranged along the horizontal direction D3" (parallel to the horizontal direction D3") and perpendicular to the gap projection G (extending substantially parallel to the arrangement direction D2".

[0055] Furthermore, if Fig. 11B As shown in the figure, when the dotted light-emitting crystals 22a', 22b', and 22c' are arranged in a triangle at the second bracket 18 (in terms of the center line), in order to avoid that at least two of the dotted light-emitting crystals 22a', 22b', and 22c' are simultaneously adjacent to the gap projection G at the junction of the first bracket 16 and the second bracket 18, but the distances to the gap projection G are unequal, thereby causing a slight local heterochromatic problem, at least two of the dotted light-emitting crystals 22a', 22b', and 22c' are adjacent to the gap projection G. The arrangement direction D2" of the two dotted light-emitting crystal particles 22a', 22b', 22c' can be parallel to the gap projection G and perpendicular to the horizontal direction D3"; as for the third dotted light-emitting crystal particle 22a', 22b' or 22c' in the triangular arrangement, it is roughly located on the center line of the line connecting the aforementioned two dotted light-emitting crystal particles 22a', 22b' or 22c'. The third dotted light-emitting crystal particle 22a', 22b' or 22c' can be far away from the gap projection G, or it can be closer to the gap projection G than the other two.

[0056] In addition, in this embodiment, the first bracket 16 is a rectangular frame as a whole, and the light-emitting chips 22a, 22b, and 22c are located below a frame portion 166a of the rectangular frame. The projection of the frame portion 166a in the vertical direction D1 has a length direction (such as Fig.11A As shown in the perspective, the length direction is equivalent to the arrangement direction D2" of the light-emitting crystal grains 22a, 22b, and 22c, and the length direction is parallel to the arrangement direction D2" of the light-emitting crystal grains 22a, 22b, and 22c. In actual operation, the light-emitting crystal grains 22a, 22b, and 22c can also be located below one of the frame portions 166b of the rectangular frame, and the light-emitting crystal grains 22a, 22b, and 22c are arranged parallel to the length direction (or extension direction) of the frame portion 166b. In addition, the first bracket 16 can also be actually made of a frame configured in other geometric shapes, such as a U-shaped (or n-shaped) frame.

[0057] In summary, the above-mentioned technical solutions of this embodiment are to set the light-emitting crystal grains 22a, 22b, 22c and 22a', 22b' or 22c' on the same side of the heterochromatic sensitive area, that is, the gap projection G. At the same time, for the light-emitting crystal grains 22a, 22b, 22c, the respective distances to the same heterochromatic sensitive area (gap projection G) are close to each other; for the light-emitting crystal grains 22a', 22b' or 22c', the respective distances to the same heterochromatic sensitive area (gap projection G) are also close to each other. For example, the size of the keycap is in the order of cm, and the distances between the multiple light-emitting crystal grains are less than 1mm. In this way, the respective distances to the same heterochromatic sensitive area are close to each other, which means that the distance difference between the light-emitting crystal grains to the same heterochromatic sensitive area (gap projection G) is almost negligible (for example, the distance difference between the light-emitting crystal grains to the same heterochromatic sensitive area is less than 1mm), and the heterochromatic situation caused by such a slight distance difference is not recognizable by the human eye.

[0058] In the present invention, the keycap 12 has a heterochromatic sensitive area in the range covered in the vertical direction D1, and the heterochromatic sensitive area is, for example, the gap projection G between the first bracket 16 and the second bracket 18 of the keycap 12, and the entirety of the plurality of light-emitting crystal grains 22a, 22b, and 22c does not overlap with the gap projection G. Since the different colored lights emitted by the plurality of light-emitting crystal grains 22a, 22b, and 22c can travel at a similar distance, the influence of the gap projection G on uneven light mixing and color deviation can be suppressed.

[0059] Also, see Fig.12. In the present embodiment, the bottom plate 14 has an outer plate edge 146 closest to the light-emitting crystal grains 22a, 22b, 22c in the horizontal direction D3", and the light-emitting crystal grains 22a, 22b, 22c and the outer plate edge 146 have a light-emitting spacing d3 in the horizontal direction D3". In principle, the farther the light-emitting crystal grains 22a, 22b, 22c are from the outer plate edge 146, the more the bottom plate 14 can suppress the light emitted by the light-emitting crystal grains 22a, 22b, 22c from escaping from the outer plate edge 146; in actual operation, the suitable light-emitting spacings of multiple models are 4.8mm, 5.3mm, 6.2mm, 7.1mm, 7.7mm, and this light-emitting spacing d3 is preferably between 4.8 and 7.7mm. In addition, in the present embodiment, the arrangement direction D2" of the light-emitting crystal grains 22a, 22b, 22c is parallel to the outer plate edge 146, but this is not limited to this in actual operation.

[0060] Also, see Fig.13A , Fig.13A for Fig.10 A top view of the luminous key structure, in which the hidden outlines of the light-emitting crystals 22a, 22b, and 22c are drawn with thin solid lines. Generally speaking, the arrangement direction of the monochromatic light source does not need to consider the length direction 12b' of the light-transmitting indication area 12a' of the keycap 12. However, in the case of a multi-color light source, such as when the light-emitting crystals 22a, 22b, and 22c are mixed to form various colors that need to be presented, if the arrangement direction D2" of the light-emitting crystals 22a, 22b, and 22c is parallel to the length direction 12b' of the light-transmitting indication area 12a' of the keycap 12, the two outer light-emitting crystals 22a and 22c provide the most sufficient light in the adjacent character segments, but the character segments far away from the light-emitting crystals 22a and 22c have a problem of insufficient light, resulting in color deviation problems in the two end segments of the light-transmitting indication area 12a' in the length direction 12b'. Furthermore, Fig. 13B for Fig.13A Extended top view of another embodiment. The arrangement direction D2" of at least two light-emitting crystal grains 22b", 22c" is perpendicular to the length direction 12b' / long axis direction 12c' of the light-transmitting indication area 12a', and is also perpendicular to the horizontal direction D3", and is parallel to the short axis direction 12d'. Since the light-emitting crystal grains 22b", 22c" are located on the same side of the same heterochromatic sensitive area, i.e., the last character "L" or "d", and the distances to the same heterochromatic sensitive area, i.e., the last character "L" or "d", are close to each other, the heterochromatic problem can be eliminated. As for the third light-emitting crystal grain 22a', it is preferably adjacent to the midline of the short axis 12d' of the light-transmitting indication area 12a'. In general, the light-emitting crystal grains 22a", 22b", and 22c" are preferably adjacent to the geometric center of the light-transmitting indication area 12a'.

[0061] In this embodiment, the length direction 12b' of the light-transmitting indication area 12a' of the key cap 12 located above the light-emitting crystal grains 22a, 22b, and 22c is perpendicular to the arrangement direction D2", so the influence of uneven light mixing caused by the light-emitting crystal grains 22a, 22b, and 22c arranged at intervals on the light-transmitting indication area 12a' can be reduced or eliminated. In addition, other descriptions on the relative position relationship between the light-emitting crystal grains 22a, 22b, and 22c and the light-transmitting indication area 12a' are as follows: , please refer to the above description of the relative position relationship between the light-emitting crystal grains 22a, 22b, 22c and the light-transmitting indication area 12a and its variation examples, which will not be described in detail. In addition, in this embodiment, the through hole 144 is roughly rectangular, and its hole edges 144a, 144b are parallel to the edges of the light-transmitting indication area 12a', and the arrangement direction D2" of the light-emitting crystal grains 22a, 22b, 22c is also parallel to the hole edges 144a, 144b of the through hole 144 (also equivalent to the inner plate edge), such as Fig.10 and Fig.12 This configuration helps to reduce the influence of the through hole 144 on the light field provided by the light-emitting crystal grains 22a, 22b, 22c to the light-transmissive indication area 12a'. Figure 8 and Fig. 9 The light-emitting crystal grains 22a, 22b, 22c are arranged relative to the through hole 142" (wherein the light-emitting crystal grains 22a, 22b, 22c are also arranged parallel to the hole edge 142a"). Moreover, the aforementioned arrangement configuration parallel to the hole edge can also be applied to the arrangement of the light-emitting crystal grains 22a, 22b, 22c relative to the through hole 142 (for example, modified to a rectangular hole) in the light-emitting key structure 1, which will not be elaborated further.

[0062] In addition, in the luminous key structure, in actual operation, it can also be modified to set the light-emitting crystal grains 22a, 22b, 22c above the bottom plate 14, so as to avoid the interference of the bottom plate 14 on the light emitted by the light-emitting crystal grains 22a, 22b, 22c. In this case, the bottom plate 14 does not need to form through holes corresponding to the light-emitting crystal grains 22a, 22b, 22c, which is beneficial to the strength of the bottom plate 14. In addition, the light-emitting crystal grains 22a, 22b, 22c can be integrated into the circuit of the switch circuit board 20, for example, the light-emitting crystal grains 22a, 22b, 22c are directly set on the lower transparent sheet of the switch circuit board 20, and the circuit thereon provides power, and the middle and upper transparent sheets are correspondingly formed with openings to expose the light-emitting crystal grains 22a, 22b, 22c. This structural configuration can eliminate the interference of the switch circuit board 20 on the light emitted by the light-emitting crystal grains 22a, 22b, 22c.

[0063] In addition, in the luminous key structures 1 and 3, the first bracket 16 and the second bracket 18 are pivotally connected to each other at the pivot axis A1 (indicated by a chain line in the figure) at their middle parts to form an X-shaped scissor-leg support frame, but this is not limited to this in actual operation. For example, the first bracket 16 and the second bracket 18 can be pivotally connected to each other at their ends, or the ends can be directly connected to the bottom plate 14 to form a V-shaped butterfly-leg bracket or an inverted V-shaped bat bracket. For another example, the first bracket 16 and the second bracket 18 can be arranged oppositely and separately (for example, each can be rotatably connected to the bottom plate 14), and a linkage bracket is used to link the first bracket 16 and the second bracket 18. In addition, the luminous key structures 1 and 3 use the elastic protrusion 26 as a restoring force mechanism, but this is not limited to this in actual operation, for example, a spring or a magnetic attraction mechanism can be used to realize the restoring force mechanism.

[0064] In actual operation, Fig.10 As shown in the present embodiment, the key cap 12 has a light-transmitting indication area 12a', the light-transmitting indication area 12a' has a length direction, and the pivot axis A1 is parallel to the length direction of the light-transmitting indication area 12a'. Fig.11A When arranged as shown, the different colored lights emitted by the light-emitting crystal particles 22a, 22b, and 22c can travel to the end of the light-transmissive indication area 12a' at a similar distance, thereby suppressing the problems of uneven light mixing and color deviation.

[0065] In addition, the above text uses the luminous key structures 1 and 3 to respectively illustrate the relative positional relationship between the light-emitting crystal grains 22a, 22b, 22c and the circuit of the switch circuit board 20 and the first bracket 16 and the second bracket 18. In other embodiments, the luminous key structure may also have both situations. For example, the switch contact 202 is adjacent to or located below the first bracket 16 or the second bracket 18, and the light-emitting crystal grains 22a, 22b, 22c are located below the first bracket 16 or the second bracket 18. For another example, the light-emitting crystal grains 22a, 22b, 22c located below the first bracket 16 or the second bracket 18 are also adjacent to the circuit of the switch circuit board 20. In addition, in actual applications, some structural features of each embodiment may also be applied to other embodiments. For example, when the light-emitting crystal grains 22a, 22b, 22c located below the bottom plate 14 are close to the circuit of the switch circuit board 20, the light-emitting crystal grains 22a, 22b, 22c may also be close to the edge of the bottom plate 14, and the aforementioned luminous key structure 3 is applicable.

[0066] Although the present invention discloses the aforementioned preferred practical operating range of the light output spacings d1, d2, and d3 through actual operating data, in actual operation, the preferred practical operating range of the light output spacings d1, d2, and d3 of the present invention is slightly sacrificed in light output effect and can still achieve a certain level of overall optical design benefit. Therefore, 15% to 20% of the end value of the preferred practical operating range of the light output spacings d1, d2, and d3 of the present invention plus or minus should still fall within the coverage of the light output spacings d1, d2, and d3 of the present invention.

[0067] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field may make various corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A luminous key structure, characterized in that Include: A key cap is movably arranged along a vertical direction, and the key cap has a heterochromatic sensitive area within a range covered in the vertical direction; and A plurality of light-emitting crystal grains are arranged below the keycap, and the plurality of light-emitting crystal grains emit light of different colors upward to illuminate the keycap, and the respective distances of the plurality of light-emitting crystal grains to the different-color sensitive areas are close to each other; The heterochromatic sensitive region is the end of the light-transmitting indication region of the keycap, the light-transmitting indication region has a length direction, and the plurality of light-emitting crystals are arranged perpendicularly to the length direction and the vertical direction below the light-transmitting indication region, and the plurality of light-emitting crystals are located on the same side of a projection of the heterochromatic sensitive region in the vertical direction; The light-transmissive indication region defines a long axis and a short axis, the long axis is parallel to the length direction, and the center of the plurality of light-emitting crystal particles as a whole is located at the center point of the long axis.

2. The luminous key structure according to claim 1, characterized in that: The light-transmissive indicating area defines a long axis and a short axis, the long axis is parallel to the length direction, and the entirety of the plurality of light-emitting crystal particles passes through a center point of the short axis.

3. The luminous key structure according to claim 1, characterized in that: The light-permeable indication area includes a plurality of light-permeable characters, the plurality of light-permeable characters are arranged along the length direction, and the heterochromatic sensitive area is the endmost one of the plurality of light-permeable characters.

4. A light-emitting key structure, characterized in that Include: First bracket; A second bracket is arranged relative to the first bracket; A keycap is supported on the first bracket and the second bracket and is movable along a vertical direction via the first bracket and the second bracket, and the keycap has a heterochromatic sensitive area within a coverage range in the vertical direction; and A plurality of light-emitting crystal grains are arranged below the keycap, and the plurality of light-emitting crystal grains emit light of different colors upward to illuminate the keycap, and the respective distances of the plurality of light-emitting crystal grains to the different-color sensitive areas are close to each other; The heterochromatic sensitive area is a projection of a gap between the first support and the second support, and the entirety of the plurality of light-emitting crystal particles does not overlap with the projection of the gap; Wherein, the plurality of light-emitting crystal grains are arranged below the first bracket, or the plurality of light-emitting crystal grains are arranged below the second bracket; The first bracket and the second bracket are light-transmissive.

5. The luminous key structure according to claim 4, characterized in that: When the plurality of light-emitting crystals are disposed below the first bracket, the light emitted upward by the plurality of light-emitting crystals correspondingly passes through the first bracket to illuminate the keycap; or, when the plurality of light-emitting crystals are disposed below the second bracket, the light emitted upward by the plurality of light-emitting crystals correspondingly passes through the second bracket to illuminate the keycap.

6. The luminous key structure according to claim 5, characterized in that: When the plurality of light-emitting crystal grains are disposed below the first bracket, the plurality of light-emitting crystal grains are arranged along an arrangement direction, the first bracket has a frame portion, a projection of the frame portion in the vertical direction has a length direction, and the length direction is parallel to the arrangement direction; When the plurality of light-emitting crystal grains are disposed below the second support, the plurality of light-emitting crystal grains are arranged along an arrangement direction. The second support has a frame portion. The projection of the frame portion in the vertical direction has a length direction, and the length direction is parallel to the arrangement direction.

7. The luminous key structure according to claim 5, characterized in that: When the plurality of light-emitting crystal particles are disposed below the first support, the light enters the first support from the lower surface of the first support and is emitted from the upper surface of the first support, and the lower surface is parallel to the upper surface; When the plurality of light-emitting crystal grains are disposed below the second support, the light enters the second support from the lower surface of the second support and exits the second support from the upper surface of the second support, and the lower surface is parallel to the upper surface.

8. The luminous key structure according to claim 5, characterized in that: The key cap has a light-transmitting indication area. The first bracket and the second bracket are pivotally connected to each other along a pivot axis, and the pivot axis is parallel to the length direction of the light-transmitting indication area.

9. The luminous key structure according to claim 4, characterized in that: The luminous key structure further includes a base plate, wherein the key cap is arranged above the base plate, the base plate has a through hole, the multiple luminous grains are located in the projection of the through hole in the vertical direction, and the multiple luminous grains are arranged along an arrangement direction, which is parallel to the hole edge of the through hole.

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