Keyboard backlight module

Abstract

A keyboard backlight module is suitable for a first language keyboard layout and a second language keyboard layout. The keyboard backlight module comprises a circuit substrate and a plurality of light-emitting units. The light-emitting units are arranged on the circuit substrate in a scattered mode. The light emitting unit emits light upwards. The first language keyboard layout includes a first keycap profile and a second keycap profile adjacent to the first keycap profile. The second language keyboard layout includes a third keycap profile. The first keycap contour and the second keycap contour are overlapped with the third keycap contour. The plurality of light-emitting units comprise a first light-emitting unit and a second light-emitting unit. The first light-emitting unit is located in the first keycap contour and the third keycap contour. The second light-emitting unit is located in the second keycap contour and the third keycap contour. According to the utility model, through the position layout of the plurality of light-emitting units, the backlight module can meet the layout of a multi-language keyboard.

Description

Technical Field

[0001] The utility model relates to a backlight module, in particular to a backlight module used for a luminous keyboard. Background Art

[0002] In the prior art, the illuminated keyboard uses a backlight module to produce a backlight effect, for example, illuminating the keycap from the bottom upward to display the characters or patterns on the keycap. Some backlight modules use a light-emitting unit to directly provide the corresponding keycap backlight upward. However, computer keyboards have corresponding key layouts for different languages. Although not all language keyboard layouts are completely different, there are still different parts and the same parts between the various language keyboard layouts. For example, the common American keyboard layout, British keyboard layout and Japanese keyboard layout are mostly the same, but a few parts are different. This situation makes the keyboards of various language keyboard layouts in principle configured with corresponding light source arrangements. In principle, the backlight modules of keyboards of various language keyboard layouts cannot be shared, which increases the production cost of keyboard manufacturers. Utility Model Content

[0003] In view of the problems in the prior art, the utility model provides a keyboard backlight module to solve the above problems.

[0004] Therefore, the technical problem to be solved by the present utility model is to provide a keyboard backlight module, which is applicable to a first language keyboard layout and a second language keyboard layout, and the keyboard backlight module comprises:

[0005] a circuit board; and

[0006] A plurality of light-emitting units, the plurality of light-emitting units are dispersedly disposed on the circuit substrate, and the plurality of light-emitting units are used to emit light;

[0007] Wherein, the first language keyboard layout includes a first keycap outline and a second keycap outline adjacent to the first keycap outline, the second language keyboard layout includes a third keycap outline, the first keycap outline and the second keycap outline both at least partially overlap with the third keycap outline, the multiple light-emitting units include a first light-emitting unit and a second light-emitting unit, the first light-emitting unit is located within the first keycap outline and the third keycap outline, and the second light-emitting unit is located within the second keycap outline and the third keycap outline.

[0008] As an optional technical solution, the plurality of light emitting units include a third light emitting unit, the third light emitting unit is located between the first key cap outline and the second key cap outline, and the third light emitting unit is located within the third key cap outline.

[0009] As an optional technical solution, the second language keyboard layout includes a fourth key cap outline adjacent to the third key cap outline, the fourth key cap outline at least partially overlaps with the second key cap outline, the multiple light emitting units further include a fourth light emitting unit, the fourth light emitting unit is located within the second key cap outline, and the fourth light emitting unit is located within the fourth key cap outline.

[0010] As an optional technical solution, a union of the first key cap contour and the second key cap contour overlaps with a union of the third key cap contour and the fourth key cap contour.

[0011] As an optional technical solution, one of the first key cap contour and the second key cap contour corresponds to the enter key in the first language keyboard layout, and one of the third key cap contour and the fourth key cap contour corresponds to the enter key in the second language keyboard layout.

[0012] As an optional technical solution, the union of the first key cap contour and the second key cap contour overlaps with the third key cap contour.

[0013] As an optional technical solution, one of the first key cap contour and the second key cap contour corresponds to the shift key in the first language keyboard layout, and the third key cap contour corresponds to the shift key in the second language keyboard layout; or, one of the first key cap contour and the second key cap contour corresponds to the backspace key in the first language keyboard layout, and the third key cap contour corresponds to the backspace key in the second language keyboard layout.

[0014] As an optional technical solution, the first language keyboard layout includes a fifth key cap outline, the fifth key cap outline is adjacent to the first key cap outline, the fifth key cap outline and the second key cap outline are located on opposite sides of the first key cap outline, the fifth key cap outline at least partially overlaps with the third key cap outline, the multiple light-emitting units further include a fifth light-emitting unit, the fifth light-emitting unit is located within the fifth key cap outline, and the fifth light-emitting unit is located within the third key cap outline.

[0015] As an optional technical solution, a union of the first key cap contour, the second key cap contour and the fifth key cap contour overlaps with the third key cap contour.

[0016] As an optional technical solution, the first key cap contour corresponds to the space key in the first language keyboard layout, and the third key cap contour corresponds to the space key in the second language keyboard layout.

[0017] As an optional technical solution, the plurality of light emitting units include a sixth light emitting unit, the sixth light emitting unit is located within the first key cap outline, and the sixth light emitting unit is located within the third key cap outline.

[0018] As an optional technical solution, the first key cap contour corresponds to the shift key in the first language keyboard layout, and the third key cap contour corresponds to the shift key in the second language keyboard layout.

[0019] As an optional technical solution, the first light emitting unit is located at the center of the first key cap outline, and the second light emitting unit is located at the center of the second key cap outline.

[0020] As an optional technical solution, the first language keyboard layout is one of the US keyboard layout, the UK keyboard layout and the Japanese keyboard layout, and the second language keyboard layout is another one of them.

[0021] As an optional technical solution, the keyboard backlight module also includes a light guide plate, wherein the light guide plate is stacked on the circuit substrate, the light guide plate has a plurality of through holes, the plurality of light emitting units are correspondingly located in the plurality of through holes, and at least part of the light emitted by the light emitting units enters the light guide plate.

[0022] As an optional technical solution, the light guide plate has a bottom surface facing the circuit substrate, and a first light diffusion structure block and a second light diffusion structure block are arranged on the bottom surface. The first light diffusion structure block overlaps with the first keycap contour, and the first light diffusion structure block overlaps with the third keycap contour, the second light diffusion structure block overlaps with the second keycap contour, and the second light diffusion structure block overlaps with the third keycap contour.

[0023] As an optional technical solution, a third light diffusion structure block is disposed on the bottom surface, the third light diffusion structure block is located between the first keycap outline and the second keycap outline, and the third light diffusion structure block is located within the third keycap outline.

[0024] As an optional technical solution, corresponding to each through hole, an annular clearance area is defined on the bottom surface, the annular clearance area surrounds and is adjacent to the corresponding through hole, and there is no light diffusion structure in the annular clearance area.

[0025] As an optional technical solution, the ring width of the annular clearance area is between 2.0 mm and 2.5 mm.

[0026] Compared to the prior art, the backlight module of the present invention can meet the needs of keyboard layouts of multiple languages ​​through the position layout of multiple light-emitting units. Multiple light-emitting units are reasonably distributed at different contours of keyboard layouts of different languages, so that the backlight module can be shared in keyboards of various language keyboard layouts, reducing the production cost of keyboard manufacturers.

[0027] 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

[0028] Figure 1 FIG. 4 is a partial exploded schematic diagram of a light-emitting key structure according to an embodiment.

[0029] Figure 2 FIG. 4 is a top view of a keyboard backlight module according to an embodiment.

[0030] Figure 3 for Figure 2 A schematic diagram of the configuration of the light-emitting unit in the keyboard backlight module on the circuit substrate.

[0031] Figure 4 To adopt Figure 2 A schematic cross-sectional view of a portion of the illuminated keyboard of a keyboard backlight module.

[0032] Figure 5 A schematic diagram of a U.S. keyboard layout implemented in a keyboard backlight module.

[0033] Figure 6 Schematic diagram of a UK keyboard layout implemented in a keyboard backlight module.

[0034] Figure 7 Schematic diagram of the Japanese keyboard layout implemented in the keyboard backlight module.

[0035] Figure 8 The diagram is a schematic diagram showing the different positions of the keyboard layouts of the above three languages ​​based on the Japanese keyboard layout.

[0036] Fig. 9 For the corresponding Figure 8 Schematic diagram of the correspondence between the light-emitting unit at the difference A and the keycap contour.

[0037] Fig.10 For the corresponding Figure 8 Schematic diagram of the correspondence between the light-emitting unit at the difference B and the keycap contour.

[0038] Fig.11 For the corresponding Figure 8 Schematic diagram of the correspondence between the light-emitting unit at the difference C and the keycap contour.

[0039] Fig.12 For the corresponding Figure 8 Schematic diagram of the correspondence between the light-emitting unit at the difference D and the keycap contour.

[0040] Fig.13 For the corresponding Figure 8 Schematic diagram of the correspondence between the light-emitting unit at the difference E and the keycap contour.

[0041] Fig.14 For the corresponding Figure 8 Schematic diagram of the distribution of the diffusion structure of the light guide plate at the different position A in the figure. DETAILED DESCRIPTION

[0042] In order to provide a further understanding of the purpose, structure, features and functions of the present invention, the present invention is described in detail below with reference to the embodiments.

[0043] See also Figure 1 . Figure 1 It is a partial exploded schematic diagram of the key structure 1 in the luminous keyboard according to the embodiment. Figure 1 The key structure 1 in the figure can be a square key (such as a letter key, a numeric key, a function key, etc.) of an illuminating keyboard, and the structural logic of other keys of the illuminating keyboard (such as a shift key, a space bar, a backspace key, a caps lock key, an enter key, etc.) is also similar to the square key and is not shown in another figure. The key structure 1 includes a base plate 10, a key cap 12, a lifting mechanism 14, a switch circuit substrate 16, an elastic member 18, a circuit substrate 20 and a light guide plate 22. The key cap 12 is disposed on the base plate 10. The lifting mechanism 14 is connected between the base plate 10 and the key cap 12 to support the key cap 12 on the base plate 10. The key cap 12 can move up and down relative to the base plate 10 via the lifting mechanism 14. The switch circuit substrate 16 is placed on the base plate 10. The switch circuit substrate 16 has a switch 202 (indicated by a slash circle in the figure). The elastic member 18 is arranged on the switch circuit substrate 16 corresponding to the switch 202 and is located below the keycap 12. The circuit substrate 20 is arranged below the base plate 10. At least one light-emitting unit 202 is arranged on the circuit substrate 20. The light guide plate 22 is arranged on the circuit substrate 20 and is located below the base plate 10. The light guide plate 22 has a through hole 222 corresponding to the light-emitting unit 202. The light emitted by the light-emitting unit 202 can be irradiated upward toward the keycap 12, or can be irradiated laterally into the light guide plate 22, and the light guide plate 22 then guides the light to irradiate upward. Among them, the circuit substrate 20 (and the light-emitting unit 202 thereon) and the light guide plate 22 serve as the backlight module of the key structure 1. In actual applications, the shielding layer 24 can be set on the surface of the light guide plate 22 facing the base plate 10 (for example, it can be realized by printing ink on the light guide plate 22 (indicated by a diagonal block in the figure), or it can be made of another layer of transparent sheet printed with ink) to selectively allow the light in the light guide plate 22 to emit out of the light guide plate 22.

[0044] In actual applications, the above-mentioned illuminated keyboard may be an illuminated keyboard with a US keyboard layout, an illuminated keyboard with a UK keyboard layout, an illuminated keyboard with a Japanese keyboard layout, or an illuminated keyboard with a keyboard layout of another language. The utility model provides a keyboard backlight module, which is suitable for keyboards with keyboard layouts of multiple languages ​​by designing the arrangement of the light-emitting units. In other words, the keyboard backlight module designed according to the utility model can be used as a backlight module of the above-mentioned illuminated keyboard, whether it is a US keyboard layout, a UK keyboard layout, or a Japanese keyboard layout.

[0045] See also Figure 2 and Figure 3 . Figure 2 FIG. 4 is a schematic top view of a keyboard backlight module 3 according to an embodiment. Figure 3 It is a schematic diagram of the configuration of the light-emitting units in the keyboard backlight module 3 on the circuit substrate. The keyboard backlight module 3 includes a circuit substrate 32, a plurality of light-emitting units 34 (one is selected and marked in the figure) and a light guide plate 36. The plurality of light-emitting units 34 are dispersedly arranged on the circuit substrate 32. The light guide plate 36 has a plurality of through holes 362 (one is selected and marked in the figure). The light guide plate 36 is superimposed on the circuit substrate 32, so that the plurality of light-emitting units 34 are correspondingly located in the plurality of through holes 362. The light-emitting units 34 can emit light in all directions and enter the light guide plate 36 through the corresponding inner walls of the through holes 362; in addition, the light-emitting units 34 can also emit light upward. For example, when the keyboard backlight module 3 is used as the backlight module of the aforementioned key structure 1, such as Figure 4 As shown, the light in the light guide plate 22 is emitted upward out of the light guide plate 22 and passes through the light-transmitting portion of the shielding layer 24 to illuminate the keycap 12 , and the light emitted upward by the light-emitting unit 34 can also pass through the light-transmitting portion of the shielding layer 24 to illuminate the keycap 12 .

[0046] Continue reading Figures 4 to 8 , Figure 4 To adopt Figure 2 A schematic cross-sectional view of a portion of the illuminated keyboard of the keyboard backlight module; Figure 5 A schematic diagram of a U.S. keyboard layout implemented in a keyboard backlight module; Figure 6 A schematic diagram of a UK keyboard layout implemented in a keyboard backlight module; Figure 7 A schematic diagram of a Japanese keyboard layout implemented in a keyboard backlight module; Figure 8 FIG. 2 is a schematic diagram showing the positions of the above three language keyboard layouts based on the Japanese keyboard layout. In this embodiment, the keyboard backlight module 3 can be applied to multiple language keyboard layouts, such as but not limited to the American keyboard layout (such as Figure 5 The keycap outline shown, some characters are not shown in the figure), the British keyboard layout (such as Figure 6 Keycap outline shown) and Japanese keyboard layout (such as Figure 7The keycap outlines shown in the figure). There are similarities between any two language keyboard layouts (i.e., the key positions are substantially the same) and differences (i.e., the key positions are misaligned). Please refer to Figure 8 , which uses the Japanese keyboard layout as the basis to show five different places A, B, C, D, E (the dotted lines in the figure indicate their range). Please also refer to Figures 5 to 8 . Difference A corresponds to the back key of the US keyboard layout, the back key of the UK keyboard layout, the back key of the Japanese keyboard layout, and an adjacent character key; wherein, the US keyboard layout at A is similar to the UK keyboard layout. Difference B corresponds to the input key and an adjacent character key of the US keyboard layout, the input key and an adjacent character key of the UK keyboard layout, the input key and an adjacent character key of the Japanese keyboard layout; wherein, the UK keyboard layout at B is similar to the Japanese keyboard layout. Difference C corresponds to the shift key of the US keyboard layout, the shift key and an adjacent character key of the UK keyboard layout, and the shift key of the Japanese keyboard layout; wherein, the US keyboard layout at C is similar to the Japanese keyboard layout. Difference D corresponds to the shift key and two adjacent character keys of the US keyboard layout, the shift key and two adjacent character keys of the UK keyboard layout, and the shift key and three adjacent character keys of the Japanese keyboard layout; wherein, the US keyboard layout at D is similar to the UK keyboard layout. The difference E corresponds to the blank key of the US keyboard layout, the blank key of the UK keyboard layout, the blank key of the Japanese keyboard layout and the two character keys adjacent to them on both sides; among them, the US keyboard layout at E is similar to the UK keyboard layout.

[0047] Please continue to refer to Fig. 9 , Fig. 9 For the corresponding Figure 8 Schematic diagram of the correspondence between the light-emitting unit at the different position A and the keycap outline. Fig. 9 As shown (and see Figures 5 to 8 ), for the difference A (represented by a chain frame in Fig. 9 In the embodiment, the first language keyboard layout (for example, the Japanese keyboard layout in this embodiment) includes a first key cap outline JPA1 and a second key cap outline JPA2 adjacent to the first key cap outline JPA1, and the second language keyboard layout (for example, the US keyboard layout or the UK keyboard layout in this embodiment) includes a third key cap outline USA3. Fig. 9 In order to facilitate the identification of the keycap contours JPA1, JPA2, and USA3, they are all represented by simple squares and their edges do not overlap; as for their actual relative relationship, they can be seen by superimposing Figures 5 to 7The first keycap outline JPA1 and the second keycap outline JPA2 both overlap with the third keycap outline USA3. The plurality of light-emitting units 34 include a first light-emitting unit 341A, a second light-emitting unit 342A and a third light-emitting unit 343A. The first light-emitting unit 341A is located within the first keycap outline JPA1 and the third keycap outline USA3 at the same time. The second light-emitting unit 342A is located within the second keycap outline JPA2 and the third keycap outline USA3 at the same time. The third light-emitting unit 343A is located between the first keycap outline JPA1 and the second keycap outline JPA2 and the third light-emitting unit 343A is located within the third keycap outline USA3. The union of the first keycap outline JPA1 and the second keycap outline JPA2 (i.e., the envelope frame shown in bold dashed lines in the figure, which surrounds the first keycap outline JPA1 and the second keycap outline JPA2) overlaps with the third keycap outline USA3. In addition, the first keycap outline JPA1 corresponds to the backspace key, and the third keycap outline USA3 corresponds to the backspace key. The first light emitting unit 341A is located at the center of the first keycap outline JPA1, the second light emitting unit 342A is located at the center of the second keycap outline JPA2, and the third light emitting unit 343A is located at the center of the third keycap outline USA3. Through the position layout of the above-mentioned multiple light emitting units, the light emitting unit at A in the backlight module can meet the lighting requirements of the first language keyboard layout and the second language keyboard layout at the same time.

[0048] Please continue to refer to Fig.10 , Fig.10 For the corresponding Figure 8 Schematic diagram of the correspondence between the light-emitting unit at the different position B and the keycap contour. Fig.10 As shown (and see Figures 5 to 8 ), for the difference B (represented by a chain frame in Fig.10 In the embodiment of the present invention, the first language keyboard layout (for example, the British keyboard layout or the Japanese keyboard layout in this embodiment) includes a first keycap outline UKB1 and a second keycap outline UKB2 adjacent to the first keycap outline UKB1, and the second language keyboard layout (for example, the American keyboard layout in this embodiment) includes a third keycap outline USB3 and a fourth keycap outline USB4 adjacent to the third keycap outline USB3. Fig.10 In order to facilitate identification of the keycap contours UKB1, UKB2, USB3, and USB4, they are all represented by simple squares and their edges do not overlap; as for their actual relative relationship, they can be seen by superimposing Figures 5 and 6The above description will not be repeated in the following text. The first keycap outline UKB1 and the second keycap outline UKB2 both partially overlap with the third keycap outline USB3, and the second keycap outline UKB2 also partially overlaps with the fourth keycap outline USB4. The plurality of light-emitting units 34 include a first light-emitting unit 341B, a second light-emitting unit 342B, a third light-emitting unit 343B and a fourth light-emitting unit 344B. The first light-emitting unit 341B is simultaneously located within the first keycap outline UKB1 and the third keycap outline USB3. The second light-emitting unit 342B is simultaneously located within the second keycap outline UKB2 and the third keycap outline USB3. The third light-emitting unit USB3 is located between the first keycap outline UKB1 and the second keycap outline UKB2 and within the third keycap outline USB3. The fourth light-emitting unit 344B is located within the second keycap outline UKB2 and within the fourth keycap outline USB4. The union of the first keycap outline UKB1 and the second keycap outline UKB2 overlaps with the union of the third keycap outline USB3 and the fourth keycap outline USB4. The aforementioned union is the envelope frame shown by the thick dotted line in the figure, which surrounds its union elements; in the difference B, the envelope frame in the figure is essentially the aforementioned two unions at the same time. The description of the union is also applicable to the following text and will not be repeated in the following text. In addition, the second keycap outline UKB2 corresponds to the enter key, and the third keycap outline USB3 corresponds to the enter key. The first light-emitting unit 341B is located in the center of the first keycap outline UKB1, the third light-emitting unit 343B is located in the center of the third keycap outline USB3, and the fourth light-emitting unit 344B is located in the center of the fourth keycap outline USB4. Through the position layout of the above-mentioned multiple light-emitting units, the light-emitting unit at B in the backlight module simultaneously meets the lighting requirements of the first language keyboard layout and the second language keyboard layout.

[0049] Please continue to refer to Fig.11 , Fig.11 For the corresponding Figure 8 Schematic diagram of the correspondence between the light-emitting unit at the different position C and the keycap contour. Fig.11 As shown (and see Figures 5 to 8 ), for the difference C (represented by a chain frame in Fig.11 In the embodiment, the first language keyboard layout (for example, the UK keyboard layout in this embodiment) includes a first keycap outline UKC1 and a second keycap outline UKC2 adjacent to the first keycap outline UKC1, and the second language keyboard layout (for example, the US keyboard layout or the Japanese keyboard layout in this embodiment) includes a third keycap outline USC3. The first keycap outline UKC1 and the second keycap outline UKC2 both overlap with the third keycap outline USC3. As for their actual relative relationship, it can be seen by superimposing Figures 5 and 6The plurality of light emitting units 34 include a first light emitting unit 341C, a second light emitting unit 342C and a third light emitting unit 343C. The first light emitting unit 341C is located within the first keycap outline UKC1 and the third keycap outline USC3 at the same time. The second light emitting unit 342C is located within the second keycap outline UKC2 and the third keycap outline USC3 at the same time. The third light emitting unit 343C is located between the first keycap outline UKC1 and the second keycap outline UKC2 and within the third keycap outline USC3. The union of the first keycap outline UKC1 and the second keycap outline UKC2 (i.e., the envelope frame shown in bold dashed lines in the figure, which surrounds the first keycap outline UKC1 and the second keycap outline UKC2) overlaps with the third keycap outline USC3. In addition, the second keycap outline UKC2 corresponds to the shift key, and the third keycap outline USC3 corresponds to the shift key. The first light emitting unit 341C is located at the center of the first keycap outline UKC1, the second light emitting unit 342C is located at the center of the second keycap outline UKC2, and the third light emitting unit 343C is located at the center of the third keycap outline USC3. Through the position layout of the above multiple light emitting units, the light emitting unit at C in the backlight module can meet the lighting requirements of the first language keyboard layout and the second language keyboard layout at the same time.

[0050] Please continue to refer to Fig.12 , Fig.12 For the corresponding Figure 8 Schematic diagram of the correspondence between the light-emitting unit at the difference D and the keycap outline. Fig.12 As shown (and see Figures 5 to 8 ), for the difference D (represented by a chain frame in Fig.12In the embodiment of the present invention, the first language keyboard layout (for example, the Japanese keyboard layout in this embodiment) includes a first keycap outline JPD1 and a second keycap outline JPD2 adjacent to the first keycap outline JPD1 (and two other unmarked keycap outlines), and the second language keyboard layout (for example, the US keyboard layout or the UK keyboard layout in this embodiment) includes a third keycap outline USD3 (and two other unmarked keycap outlines). The first keycap outline JPD1 and the second keycap outline JPD2 both overlap with the third keycap outline USD3. The plurality of light-emitting units 34 include a first light-emitting unit 341D, a second light-emitting unit 342D, and a sixth light-emitting unit 346D. The first light-emitting unit 341D is simultaneously located within the first keycap outline JPD1 and the third keycap outline USD3. The second light-emitting unit 342D is simultaneously located within the second keycap outline JPD2 and the third keycap outline USD3. The sixth light-emitting unit 346D is located within the first keycap outline JPD1 and within the third keycap outline USD3. In addition, the first keycap outline JPD1 corresponds to the shift key, and the third keycap outline USD3 corresponds to the shift key. The first light emitting unit 341D is located at the center of the first keycap outline JPD1, the second light emitting unit 342D is located at the center of the second keycap outline JPD2, and the sixth light emitting unit 346D is located at the center of the third keycap outline USD3. Through the position layout of the above multiple light emitting units, the light emitting unit at C in the backlight module can meet the lighting requirements of the first language keyboard layout and the second language keyboard layout at the same time.

[0051] Please continue to refer to Fig.13 , Fig.13 For the corresponding Figure 8 Schematic diagram of the correspondence between the light-emitting unit and the keycap contour at the difference E in FIG. Fig.13 As shown (and see Figures 5 to 8 ), for the difference E (represented by a chain frame in Fig.13In the embodiment of the present invention, the first language keyboard layout (for example, the Japanese keyboard layout in this embodiment) includes a first keycap outline JPE1 and a second keycap outline JPE2 and a fifth keycap outline JPE5 adjacent to the first keycap outline JPE1, and the fifth keycap outline JPE5 and the second keycap outline JPE2 are located on opposite sides of the first keycap outline JPE1, and the second language keyboard layout (for example, the US keyboard layout or the UK keyboard layout in this embodiment) includes a third keycap outline USE3. The first keycap outline JPE1, the second keycap outline JPE2 and the fifth keycap outline JPE5 all overlap with the third keycap outline USE3. The plurality of light-emitting units 34 include a first light-emitting unit 341E, a second light-emitting unit 342E, a third light-emitting unit 343E and a fifth light-emitting unit 345E. The first light-emitting unit 341E is located within the first keycap outline JPE1 and the third keycap outline USE3 at the same time. The second light-emitting unit 342E is located within the second keycap outline JPE2 and the third keycap outline USE3 at the same time. The fifth light-emitting unit 345E is located within the fifth keycap outline JPE5 and the third keycap outline USE3 at the same time. The union of the first keycap outline JPE1, the second keycap outline JPE2 and the fifth keycap outline JPE5 (i.e., the envelope frame shown in bold dashed lines in the figure, which surrounds the first keycap outline JPE1, the second keycap outline JPE2 and the fifth keycap outline JPE5) overlaps with the third keycap outline USE3. In addition, the first keycap outline JPE1 corresponds to the space key, and the third keycap outline USE3 corresponds to the space key. The first light-emitting unit 341E is located in the center of the first keycap outline JPE1 and in the center of the third keycap outline USE3, the second light-emitting unit 342E is located in the center of the second keycap outline JPE2, and the fifth light-emitting unit 345E is located in the center of the fifth keycap outline JPE5. Through the position layout of the above-mentioned multiple light-emitting units, the light-emitting unit at E in the backlight module simultaneously meets the lighting requirements of the first language keyboard layout and the second language keyboard layout.

[0052] Please go back Figure 4 . The light guide plate 36 of the keyboard backlight module 3 has a top surface 364 and a bottom surface 366 relative to the top surface 364, and the bottom surface 366 faces the circuit substrate 32. The through hole 362 passes through the top surface 364 and the bottom surface 366. There is a light diffusion structure 368 on the bottom surface 366, which is used to diffuse the light emitted from the light guide plate 36 to the bottom surface 366, and helps the light to be emitted from the top surface 364. The light diffusion structure 368 can be realized by printing dots on the bottom surface 366, or forming a microstructure thereon. In actual applications, the distribution range of the light diffusion structure 368 corresponds to the hollow part of the bottom plate 10 (refer to Figure 1 ). Please also refer to Fig.14 , which corresponds to the difference A (see Fig. 9) is a schematic diagram of the distribution of the diffusion structure 368 of the light guide plate 36; the difference A is represented by a chain frame in the figure, and the key cap contours JPA1, JPA2, and USA3 are all represented by simple squares and their edges do not overlap for easy identification; as for their actual relative relationship, it can be seen by superimposing Figures 5 to 7 Taking the difference A as an example, a plurality of first light diffusion structure blocks 3682 (all located within the keycap outline JPA1, with the distribution range indicated by grid filling) and a plurality of second light diffusion structure blocks 3684 (all located within the keycap outline JPA2, with the distribution range indicated by grid filling) are provided on the bottom surface 366. The plurality of first light diffusion structure blocks 3682 are arranged roughly around a through hole 362, and the plurality of first light diffusion structure blocks 3682 overlap with the first keycap outline JPA1 and overlap with the third keycap outline USA3. The plurality of second light diffusion structure blocks 3684 are arranged roughly around another through hole 362, and the plurality of second light diffusion structure blocks 3684 overlap with the second keycap outline JPA2 and overlap with the third keycap outline USA3. In principle, the shielding layer 24 and the bottom plate 10 corresponding to the first light diffusion structure block 3682 and the second light diffusion structure block 3684 have light-transmitting portions or hollows to allow the light emitted from the top surface 364 to pass through, thereby irradiating the keycap 12 .

[0053] In addition, if Fig.14 As shown, two third light diffusion structure blocks 3686 are also provided on the bottom surface 366 (located between the keycap outlines JPA1 and JPA2, and the distribution range is indicated by grid filling), and the two third light diffusion structure blocks 3686 are located on opposite sides of another through hole 362. The two third light diffusion structure blocks 3686 are located between the first keycap outline JPA1 and the second keycap outline JPA2 and within the third keycap outline USA3. At this time, when the keyboard backlight module 3 is suitable for the second language keyboard layout (such as the US keyboard layout or the UK keyboard layout), the shielding layer 24 and the bottom plate 10 corresponding to the third light diffusion structure block 3686 will have a light-transmitting portion or a hollow to allow the light emitted from the top surface 364 to pass through, thereby irradiating the keycap 12. When the keyboard backlight module 3 is suitable for the first language keyboard layout (such as the Japanese keyboard layout), the shielding layer 24 corresponding to the third light diffusion structure block 3686 will not have a light-transmitting portion in principle to maintain the shielding of the light guide plate 22 here.

[0054] In addition, if Fig.14 As shown, for each through hole 362, an annular clearance area 3662 (filled with diagonal lines to indicate its range) is defined on the bottom surface 366, surrounding and adjacent to the through hole 362. There is no light diffusion structure in the annular clearance area 3662. This design can prevent the corresponding light emitting unit 34 from being too bright directly above. In practical applications, the ring width of the annular clearance area 3662 can be designed to be between 2.0 mm and 2.5 mm.

[0055] In addition, the description of the distribution of the diffusion structure 368 of the light guide plate 36 at other differences B, C, D, and E can directly refer to the previous description of the distribution of the diffusion structure 368 of the light guide plate 36 at the difference A, and no further elaboration is required.

[0056] To sum up, the backlight module of the present invention can meet the needs of keyboard layouts of multiple languages ​​through the position layout of multiple light-emitting units. Multiple light-emitting units are reasonably distributed at different contours of keyboard layouts of different language, so that the backlight module can be shared in keyboards with various language keyboard layouts, reducing the production cost of keyboard manufacturers.

[0057] 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 keyboard backlight module, applicable to a first language keyboard layout and a second language keyboard layout, characterized in that: The keyboard backlight module includes: Circuit board; as well as A plurality of light-emitting units, the plurality of light-emitting units are dispersedly disposed on the circuit substrate, and the plurality of light-emitting units are used to emit light; Wherein, the first language keyboard layout includes a first keycap outline and a second keycap outline adjacent to the first keycap outline, the second language keyboard layout includes a third keycap outline, the first keycap outline and the second keycap outline both at least partially overlap with the third keycap outline, the multiple light-emitting units include a first light-emitting unit and a second light-emitting unit, the first light-emitting unit is located within the first keycap outline and the third keycap outline, and the second light-emitting unit is located within the second keycap outline and the third keycap outline.

2. The keyboard backlight module according to claim 1, characterized in that: The plurality of light emitting units include a third light emitting unit, the third light emitting unit is located between the first key cap outline and the second key cap outline, and the third light emitting unit is located within the third key cap outline.

3. The keyboard backlight module according to claim 1, characterized in that: The second language keyboard layout includes a fourth keycap contour adjacent to the third keycap contour, the fourth keycap contour at least partially overlaps with the second keycap contour, the multiple light-emitting units further include a fourth light-emitting unit, the fourth light-emitting unit is located within the second keycap contour, and the fourth light-emitting unit is located within the fourth keycap contour.

4. The keyboard backlight module according to claim 3, characterized in that: The union of the first key cap contour and the second key cap contour overlaps with the union of the third key cap contour and the fourth key cap contour.

5. The keyboard backlight module according to claim 4, characterized in that: One of the first key cap contour and the second key cap contour corresponds to the enter key in the first language keyboard layout, and one of the third key cap contour and the fourth key cap contour corresponds to the enter key in the second language keyboard layout.

6. The keyboard backlight module according to claim 1, characterized in that: The union of the first key cap contour and the second key cap contour coincides with the third key cap contour.

7. The keyboard backlight module according to claim 6, characterized in that: One of the first keycap contour and the second keycap contour corresponds to the shift key in the first language keyboard layout, and the third keycap contour corresponds to the shift key in the second language keyboard layout; or, one of the first keycap contour and the second keycap contour corresponds to the backspace key in the first language keyboard layout, and the third keycap contour corresponds to the backspace key in the second language keyboard layout.

8. The keyboard backlight module according to claim 1, characterized in that: The first language keyboard layout includes a fifth keycap contour, the fifth keycap contour is adjacent to the first keycap contour, the fifth keycap contour and the second keycap contour are located on opposite sides of the first keycap contour, the fifth keycap contour and the third keycap contour at least partially overlap, the multiple light-emitting units further include a fifth light-emitting unit, the fifth light-emitting unit is located within the fifth keycap contour, and the fifth light-emitting unit is located within the third keycap contour.

9. The keyboard backlight module according to claim 8, characterized in that: The union of the first key cap contour, the second key cap contour and the fifth key cap contour coincides with the third key cap contour.

10. The keyboard backlight module according to claim 9, characterized in that: The first key cap contour corresponds to the space key in the first language keyboard layout, and the third key cap contour corresponds to the space key in the second language keyboard layout.

11. The keyboard backlight module according to claim 1, characterized in that: The plurality of light emitting units include a sixth light emitting unit, the sixth light emitting unit is located within the first key cap outline, and the sixth light emitting unit is located within the third key cap outline.

12. The keyboard backlight module according to claim 11, characterized in that: The first key cap contour corresponds to the shift key in the first language keyboard layout, and the third key cap contour corresponds to the shift key in the second language keyboard layout.

13. The keyboard backlight module according to claim 1, characterized in that: The first light emitting unit is located at the center of the first key cap outline, and the second light emitting unit is located at the center of the second key cap outline.

14. The keyboard backlight module according to claim 1, characterized in that: The first language keyboard layout is one of the US keyboard layout, the UK keyboard layout and the Japanese keyboard layout, and the second language keyboard layout is another one of them.

15. The keyboard backlight module according to claim 1, characterized in that: The keyboard backlight module also includes a light guide plate, wherein the light guide plate is stacked on the circuit substrate, the light guide plate has a plurality of through holes, the plurality of light emitting units are correspondingly located in the plurality of through holes, and at least part of the light emitted by the light emitting units enters the light guide plate.

16. The keyboard backlight module according to claim 15, characterized in that: The light guide plate has a bottom surface facing the circuit substrate, and a first light diffusion structure block and a second light diffusion structure block are arranged on the bottom surface. The first light diffusion structure block overlaps with the first keycap contour, and the first light diffusion structure block overlaps with the third keycap contour, the second light diffusion structure block overlaps with the second keycap contour, and the second light diffusion structure block overlaps with the third keycap contour.

17. The keyboard backlight module according to claim 16, characterized in that: A third light diffusion structure block is disposed on the bottom surface. The third light diffusion structure block is located between the first key cap outline and the second key cap outline, and the third light diffusion structure block is located within the third key cap outline.

18. The keyboard backlight module according to claim 16, wherein: Corresponding to each through hole, an annular clearance area is defined on the bottom surface. The annular clearance area surrounds and is adjacent to the corresponding through hole. There is no light diffusion structure in the annular clearance area.

19. The keyboard backlight module according to claim 18, characterized in that: The annular clearance area has an annular width between 2.0 mm and 2.5 mm.

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