TWI884645B - Touch lighting keyswitch and touch lighting function key row - Google Patents

Abstract

A touch lighting keyswitch can be changed to a touch lighting function key row includes a circuit board, a first sheltering component, a first light guiding component, a second sheltering component and a second light guiding component. The circuit board has a first light unit and a second light unit respectively emitting a first illumination beam and a second illumination beam. The first sheltering component has a character hole. The first light guiding component is disposed between the circuit board and the first sheltering component and adapted to guide the first illumination beam passing through the character hole. The second sheltering component is disposed above the first sheltering component, and has an opening relevant to the character hole. The second light guiding component is disposed between the first sheltering component and the second sheltering component and adapted to guide the second illumination beam passing through the opening.

Description

Touch-type luminous key and touch-type luminous function key bar

The present invention provides a touch-type luminous key and a touch-type luminous function key array, in particular, a touch-type luminous key and a touch-type luminous function key array that can effectively isolate light leakage and is easy to assemble.

With the advancement of technology, computer equipment often designs a light-emitting touch module composed of multiple operating keys on the input interface. The light-emitting touch module includes a corresponding number of key groups, light guide units and light units. The light guide unit is located above the key group, and the light unit is set next to the light guide unit to provide side lighting. The light guide units are small in size and are set at intervals. They need to be installed on the key group separately, and attention should be paid to whether the corresponding light units are correctly aligned and the distance between adjacent light guide units reaches the predetermined distance, which makes assembly more difficult. Even if multiple light guide units are made into an integrated structure, traditional related designs cannot effectively prevent light leakage from adjacent light guide units, which means that the illumination light emitted when a certain operation key is triggered will overflow to the adjacent operation key that is not triggered, making the traditional light-emitting touch module unable to provide a better user experience. Therefore, how to design a light guide sheet that does not leak light, is easy to assemble, and can be applied to multiple operation keys arranged in strips is one of the development goals of the related mechanism design industry.

The present invention provides a touch-type luminous key that can effectively isolate light leakage and is easy to assemble, and a touch-type luminous function key array to solve the above-mentioned problems.

The scope of the patent application of the present invention discloses a touch-type luminous key, which includes a circuit substrate, a first shading sheet, a first light guide sheet, a second shading sheet and a second light guide sheet. The circuit substrate is provided with a first light-emitting unit and a second light-emitting unit, the first light-emitting unit provides a first illumination beam, and the second light-emitting unit provides a second illumination beam of a color different from the first illumination beam. The first shading sheet has a character hole. The first light guide sheet is arranged between the circuit substrate and the first shading sheet, and is used to guide the first illumination beam to pass through the character hole. The second shading sheet is located above the first shading sheet and has an opening corresponding to the character hole. The second light guide sheet is arranged between the second shading sheet and the first shading sheet, and is used to guide the second illumination beam to be projected onto the opening when the first illumination beam passes through the character hole and the opening.

The patent application scope of the present invention further discloses a touch-type luminous function keyboard, which includes a circuit substrate, a first shading sheet, a second shading sheet and a light guide assembly. The circuit substrate is provided with at least two first light-emitting units and at least two second light-emitting units. The first light-emitting units each provide a first illumination beam. The second light-emitting units each provide a second illumination beam having a color different from that of the first illumination beam. One of the first light-emitting units and a second light-emitting unit corresponding to one of the second light-emitting units are arranged in pairs. The first shading sheet has at least two character holes. The second shading sheet is located above the first shading sheet and has at least two openings corresponding to the character holes. The light guide assembly includes a first light-guiding body and a second light-guiding body. The first light-guiding body includes a first lower light-guiding unit and a first upper light-guiding unit. The first lower light guide unit is arranged between the first light shielding sheet and the circuit substrate, and is used to guide the first illumination beam of one of the first light-emitting units to pass through one of the character holes. The first upper light guide unit is arranged between the second light shielding sheet and the first light shielding sheet, and is used to guide the second illumination beam of the corresponding second light-emitting unit to be projected onto one of the openings when the first light-emitting unit outputs the first illumination beam. The second light guide body is adjacent to and separated from the first light guide body. The second light guide body includes a second lower light guide unit and a second upper light guide unit. The second lower light guide unit is arranged between the first light shielding sheet and the circuit substrate, and is used to guide the first illumination beam of another first light-emitting unit of the first light-emitting units to pass through another character hole of the character holes. The second upper light guide unit is disposed between the second light shielding sheet and the first light shielding sheet, and is used to guide the second illumination beam of another second light emitting unit of the second light emitting units to be projected onto another opening of the openings when the other first light emitting unit outputs the first illumination beam.

The backlight module of the present invention is designed to be a multi-key light guide plate having a plurality of light guide bodies and a bridge portion. The plurality of light guide bodies are adjacent to each other and have intervals therebetween, and the bridge portion is connected to the adjacent light guide bodies so that the multi-key light guide plate can be easily assembled. The light guide body can be designed into a rectangular structure, a diamond structure, a circular structure, a polygonal structure, and the like. The bridge portion can be designed into a variety of styles, such as a C-shaped structure, an S-shaped structure, a W-shaped structure, an M-shaped structure, or a concave-convex structure. The bridge portion is further divided into a plurality of relatively bent sections, and the bridge portion is connected to the light guide body in a relatively bent manner. Therefore, the multi-key light guide plate is designed with a circuitous bridge portion between adjacent light guide bodies, and its width is approximately 0.1 mm to 2 mm, which can effectively increase the number of reflections and absorptions during light transmission to prevent light from being transmitted to other light guide bodies, thereby achieving the design purpose of no light leakage. Furthermore, the present invention can also design a multi-layer stacked shading sheet and light guide sheet on the touch-type luminous key, and configure a plurality of luminous units that match the number of layers of the shading sheet and the light guide sheet, so that the touch-type luminous key can not only emit backlight illumination when in standby mode, but also emit another type of prompt illumination different from the backlight illumination when pressed to provide light interaction; accordingly, the present invention Mingke can further apply the multi-key light guide sheet to the touch-type luminous function keyboard. When the touch-type luminous function keyboard is in standby mode, all function keys will emit backlight illumination. When a specific function key is pressed, it can emit another type of prompt illumination different from the backlight illumination, thereby enhancing the design texture of the touch-type luminous keys and the luminous keyboard used in the touch-type luminous function keyboard.

10: Input device

12: Backlight module

14: Input interface

141:Symbol

16: Circuit board

18: Light-emitting element

20,20’,20A,20B,20C: Light guide sheet

22: Network area

24: Reflective layer

26: Shielding layer

261: Translucent area

262: Shade area

28: First light guide body

30: Second light guide body

32: Bridge connection

34,34A,34B,34C: First section

36,36A,36B,36C:Second section

38: Light absorbing element

40: Upper surface

42: Lower surface

44: Network

46: Shading element

48: Light-absorbing coating

50: Hydrogel layer

70: Light guide unit

72: Light-emitting unit

100: Touch-type light-emitting button

102: Circuit board

104: First shading sheet

106: Second shading sheet

108: First light guide plate

110: Second light guide plate

112: Reflective sheet

114: First shielding sheet

116: Second shielding sheet

118: Translucent cover

120: Touch module

122: Control unit

124: First light-emitting unit

126: Second light-emitting unit

128: Character hole

130: Open mouth

132: The first hollowed-out area

134: First avoidance area

136: The second hollowed-out area

138: Second avoidance area

140: Touch area

150: Touch-sensitive luminous function keypad

152: Circuit board

154: First shading sheet

156: Second shading sheet

158: Light guide combination

160: Translucent cover

162: First shielding sheet

164: Second shielding sheet

166:Reflective sheet

168: Touch module

170: Control unit

172: First light-emitting unit

174: Second light-emitting unit

176: Character hole

178: Open mouth

180: First light guide body

182: Second light guide body

184: First lower light guide unit

186: First upper light guide unit

188: Second lower light guide unit

190: Second upper light guide unit

192: First light guide plate

194: Second light guide plate

196: Section 1

198:Second section

200: Bridge connection

202: Touch area

B1: First illumination beam

B2: Second illumination beam

Figure 1 is a side view of the structure of the input device of an embodiment of the present invention.

Figure 2 is a schematic diagram of the multi-key light guide plate of the first embodiment of the present invention.

Figure 3 is a schematic diagram of the multi-key light guide plate of the second embodiment of the present invention.

Figure 4 is a schematic diagram of the multi-key light guide sheet of the third embodiment of the present invention.

Figure 5 is a schematic diagram of the multi-key light guide sheet of the fourth embodiment of the present invention.

Figure 6 is a schematic diagram of a multi-key light guide sheet of another embodiment of the present invention.

Figure 7 is a functional block diagram of the touch-type luminous key of the embodiment of the present invention.

Figure 8 is an exploded view of the components of the touch-sensitive luminous key according to an embodiment of the present invention.

Figures 9 and 10 are cross-sectional views of the touch-sensitive luminous keypad of the present invention at different stages of use.

Figure 11 is a schematic diagram of the first light shielding film of an embodiment of the present invention.

Figure 12 is a schematic diagram of the second light shielding film of the embodiment of the present invention.

Figure 13 is a schematic diagram of the first light guide plate and the first shielding plate of an embodiment of the present invention.

Figure 14 is a schematic diagram of the second light guide plate and the second shielding plate of an embodiment of the present invention.

Figure 15 is a schematic diagram of the components of the touch-sensitive luminous function keypad of the embodiment of the present invention.

Figure 16 is a functional block diagram of the touch-sensitive luminous function keypad of the embodiment of the present invention.

Please refer to FIG. 1, which is a structural side view of an input device 10 of an embodiment of the present invention. The input device 10 may be a touch panel or a touch device with similar functions. The input device 10 may include a backlight module 12 and an input interface 14. The input interface 14 may be a touch interface of various types, which will not be described in detail here. The backlight module 12 may optionally include a circuit board 16, a light-emitting element 18, and a light guide 20. The light-emitting element 18 may be disposed on the circuit board 16. The light guide 20 is located on the light-emitting element 18 to provide a side-entry backlight function. In addition, a reflective layer 24 may be optionally disposed between the light guide 20 and the circuit board 16. A shielding layer 26 can be optionally provided between the backlight module 12 and the input interface 14. The shielding layer 26 has a light-transmitting area 261 and a light-shielding area 262. Black or dark ink can be printed on the upper or lower surface of the transparent film to form the light-shielding area 262. The area of the transparent film without the black or dark ink printed is the light-transmitting area 261; however, the actual application is not limited to this. The component configuration of the input device 10 is not limited to the aforementioned implementation mode, but depends on the design requirements.

The light guide plate 20 can be a multi-key light guide plate, which means that the multi-key light guide plate 20 can be used with multiple operation buttons applied to the input interface 14, so the multi-key light guide plate 20 can have multiple light guide bodies to be respectively set at positions corresponding to each operation button, and the multiple light guide bodies are respectively aligned with multiple light emitting elements 18; each light emitting element 18 can be a single-color or multi-color light emitting unit. In addition, in order to meet the design requirements of connecting multiple light guide bodies and isolating the light interference of adjacent operation buttons, the present invention further uses air isolation and bridge design, so that the multi-key light guide plate 20 can be applied to the backlight module 12 and its input device 10 to effectively isolate the light leakage between the operation buttons.

Please refer to FIG. 2, which is a schematic diagram of a multi-key light guide plate 20 of the first embodiment of the present invention. The multi-key light guide plate 20 may include at least a first light guide body 28, a second light guide body 30, and a bridge portion 32. The second light guide body 30 is adjacent to and separated from the first light guide body 28. The bridge portion 32 may be connected between the first light guide body 28 and the second light guide body 30. The multi-key light guide plate 20 may also selectively have a dot area 22, which is disposed on the first light guide body 28 and/or the second light guide body 30, and is used to guide light to illuminate the corresponding symbol 141 on the input interface 14. The dot area 22 can be selectively disposed on the top or bottom surface of the first light guide body 28 and/or the second light guide body 30, and its structure may be a micro-prism or white dot printing, but the actual application is not limited thereto. Generally speaking, the bridge portion 32 is made of the same material as the first light guide body 28 and the second light guide body 30 and is made in an integral molding manner, but the actual application is not limited thereto. The number and connection position of the light guide bodies 28 and 30 and the bridge portion 32 are also not limited to the embodiments shown in the figure, and can be determined according to the size of the backlight module 12 or the number of the multiple operation buttons of the input interface 14. For example, the multi-key light guide plate 20 is made of a light guide material. The present invention can determine the overall length of the multi-key light guide plate 20 according to the characteristics of the light guide material, so as to reduce or avoid structural deformation of the multi-key light guide plate 20 caused by the elongation of the bridge portion.

The bridge portion 32 may have a first section 34 and a second section 36 that are bent relative to each other. The first section 34 may be connected between the first light guide body 28 and the second section 36, and the second section 36 may be connected between the second light guide body 30 and the first section 34. As shown in FIG. 2, the present invention designs the bridge portion 32 between the adjacent first light guide body 28 and the second light guide body 30 into a bent shape, such as a C-shaped structure or a semicircular structure, to increase the absorption and reflection times of light in the bridge portion 32, so as to prevent the light output by each light-emitting element 18 and entering the first light guide body 28 from being guided to the second light guide body 30.

In addition to the first section 34 and the second section 36 being relatively bendable structures, the multi-key light guide sheet 20 also connects the first section 34 to the first light guide body 28 in a relatively bendable manner, and connects the second section 36 to the second light guide body 30 in a relatively bendable manner. In other words, the connection between the first section 34 and the first light guide body 28 (or the second section 36 and the second light guide body 30) can be an arc-shaped structure or a hook-shaped structure, which can effectively increase the absorption and reflection times of light in the first section 34 (or the second section 36) to prevent the light output by each light-emitting element 18 from being guided to other light guide bodies.

In addition, the connection between the first section 34 and the second section 36 may also present an arc structure, as shown in FIG. 2. The arc structure can increase the absorption and reflection times of light when it is transmitted between the first section 34 and the second section 36; however, the connection between the first section 34 and the second section 36 is not limited to the aforementioned implementation. Please refer to FIG. 3, which is a schematic diagram of the multi-key light guide 20A of the second embodiment of the present invention. In each embodiment of the present invention, the components with the same number as other embodiments have the same structure and function, and will not be repeated here. The connection between the first section 34A and the second section 36A of the multi-key light guide 20A presents an angle structure, which is used to increase the absorption and reflection times of light when it is transmitted between the first section 34A and the second section 36A.

As shown in FIG. 2 and FIG. 3, the first section 34 and the second section 36 (or the first section 34A and the second section 36A) are both bent sections, which are used to increase the absorption and reflection times of light when it is transmitted in each section; however, the actual application is not limited to this. Please refer to FIG. 4, which is a schematic diagram of a multi-key light guide plate 20B of the third embodiment of the present invention. The first section 34B and the second section 36B of the multi-key light guide plate 20B are both straight sections; as long as the connection between the first section 34B and the first light guide body 28, the connection between the first section 34B and the second section 36B, and the connection between the second section 36B and the second light guide body 30 are arc-shaped structures or angled structures, the absorption and reflection times of light when transmitted between the first light guide body 28 and the second light guide body 30 can be increased.

Furthermore, as shown in Figures 2 to 4, the first section 34 and the second section 36 (or the first section 34A and the second section 36A, or the first section 34B and the second section 36B) are located outside the gap between the first light guide body 28 and the second light guide body 30; however, the actual application is not limited thereto. Please refer to Figure 5, which is a schematic diagram of the multi-key light guide sheet 20C of the fourth embodiment of the present invention. The first section 34C and the second section 36C of the multi-key light guide sheet 20C can be straight sections or bent sections, and the connection can present an arc structure or an angle structure, and can also be connected to the first light guide body 28 and the second light guide body 30 respectively in a relatively bent manner, and then extend into the gap between the first light guide body 28 and the second light guide body 30.

Please refer to FIG. 2 again. The multi-key light guide plate 20 may further include a light absorbing element 38 disposed in the gap between the first light guide body 28 and the second light guide body 30. The light output by the light emitting element 18 will increase the number of light absorption and reflection times due to the circuitous path of the bridge portion 32, so as to prevent it from being guided into other light guide bodies; and the gap between the adjacent first light guide body 28 and the second light guide body 30 may be filled with the light absorbing element 38, which can further improve the light leakage isolation effect of the multi-key light guide plate 20. The material of the light absorbing element 38 can be determined according to the design requirements; the light absorbing element 38 can also completely fill the gap between the first light guide body 28 and the second light guide body 30, or leave a small gap. The installation method depends on the isolation intensity of the multi-key light guide plate 20 to prevent light leakage.

Please refer to FIG. 6, which is a schematic diagram of a multi-key light guide 20' of another embodiment of the present invention. There is no specific restriction on the shape of the bridge portion 32 of the present invention, so the appearance of the bridge portion 32 shown in FIG. 6 is slightly different from the embodiment shown in the above figure. Any bridge portion that meets the above description can be applied to the multi-key light guide 20'. The bridge portion 32 may have a relative upper surface 40 and a lower surface 42. The multi-key light guide 20' may coat or form a plurality of dots 44 on the upper surface 40 and/or the lower surface 42, the purpose of which is to destroy the total reflection characteristics of light and prevent light leakage. Correspondingly, the multi-key light guide sheet 20' can also selectively apply or form a plurality of dots 44 on the upper surface and the lower surface of the first light guide body 28 and/or the second light guide body 30. The material properties, distribution density and pattern of the dots 44 are not limited to the illustrated implementation.

As shown in FIG. 6, in order to further enhance the effect of the bridge portion 32 in preventing light leakage, the present invention can also set a shading element 46 on the upper surface and/or lower surface of the multi-key light guide plate 20'. The shading element 46 is made of a shading or light-absorbing material; and a light-absorbing coating 48 can be selectively additionally provided on the surface of the shading element 46 facing the multi-key light guide plate 20' to further enhance the shading effect of the shading element 46. In addition, the present invention can additionally coat a hydrogel layer 50 on the surface of the shading element 46 facing the multi-key light guide plate 20' to ensure that the shading element 46 can be closely attached to the multi-key light guide plate 20'.

Please refer to Figures 7 to 10, Figure 7 is a functional block diagram of the touch-type light-emitting key 100 of the embodiment of the present invention, Figure 8 is a component explosion diagram of the touch-type light-emitting key 100 of the embodiment of the present invention, and Figures 9 and 10 are structural cross-sectional views of the touch-type light-emitting key 100 of the embodiment of the present invention at different use stages. The touch-type light-emitting key 100 can selectively include a circuit substrate 102, a first light shielding sheet 104, a second light shielding sheet 106, a first light guide sheet 108, a second light guide sheet 110, a reflective sheet 112, a first shielding sheet 114, a second shielding sheet 116, a light-transmitting cover 118, a touch module 120, and a control unit 122. The stacking sequence of the above optical components is shown in Figure 8; the touch module 120 and the control unit 122 are electronic control components, which are only drawn in Figure 7 and are described first.

Please refer to Figures 11 to 14, Figure 11 is a schematic diagram of the first shading film 104 of an embodiment of the present invention, Figure 12 is a schematic diagram of the second shading film 106 of an embodiment of the present invention, Figure 13 is a schematic diagram of the first light guide plate 108 and the first shielding plate 114 of an embodiment of the present invention, and Figure 14 is a schematic diagram of the second light guide plate 110 and the second shielding plate 116 of an embodiment of the present invention. The circuit substrate 102 may have a first light emitting unit 124 and a second light emitting unit 126. The first light emitting unit 124 provides a first illumination beam B1. The second light emitting unit 126 provides a second illumination beam B2 of a color different from the first illumination beam B1; for example, the first illumination beam B1 may be white light, and the second illumination beam B2 may be green light, depending on the design requirements. The first illumination beam B1 serves as the illumination light source when the touch-sensitive luminous key 100 is in standby mode, and the second illumination beam B2 serves as the illumination light source for providing visual feedback when the touch-sensitive luminous key 100 is pressed and actuated.

The first light shielding sheet 104 can be disposed above the circuit substrate 102 and has a character hole 128. The character hole 128 is generally located in the central area of the first light shielding sheet 104, and its shape depends on the position of the touch-sensitive luminous key 100 on the keyboard, such as a battery shape, a speaker shape, or an Fn character. The first light guide sheet 108 can be disposed between the circuit substrate 102 and the first light shielding sheet 104 to guide the first illumination beam B1 to pass through the character hole 128, as shown in FIG. 9. The second light shielding sheet 106 is located above the first light shielding sheet 104 and has an opening 130 corresponding to the character hole 128. The opening 130 can be designed into various shapes, such as a circular opening, a polygonal opening, or an irregular opening; as long as the opening 130 is located directly above the character hole 128 and the opening area of the opening 130 is larger than the maximum outline size of the character hole 128 so that the second illumination beam B2 can illuminate the character hole 128 and its surroundings, it meets the design purpose of the present invention. The second light guide plate 110 can be disposed between the second light shielding plate 106 and the first light shielding plate 104, and is used to guide the second illumination beam B2 to be projected onto the opening 130 when the first illumination beam B1 passes through the character hole 128 and the opening 130, that is, when the touch-type luminous key 100 is pressed to emit light, the color light of the first illumination beam B1 and the second illumination beam B2 will be emitted at the same time, as shown in Figure 10.

In addition, the first shielding sheet 114 may have a first hollowed-out area 132 and a first avoidance area 134 which are independent of each other. The second light emitting unit 126 is inserted into the first avoidance area 134, the first light guide sheet 108 is disposed in the first hollowed-out area 132, and the first light emitting unit 124 is also inserted into the first hollowed-out area 132 to be adjacent to the first light guide sheet 108; as shown in FIG. 13, the first shielding sheet 114 will block between the second light emitting unit 126 and the first light guide sheet 108, and the first illumination beam B1 provided by the first light emitting unit 124 can be transmitted to the first light shielding sheet 104 through the first light guide sheet 108 which is also in the first hollowed-out area 132, while the second illumination beam B2 provided by the second light emitting unit 126 is blocked by the first avoidance area 134 and will not enter the first light guide sheet 108.

Correspondingly, the second shielding sheet 116 may have a second hollowed-out area 136 and a second avoidance area 138 that are independent of each other. The first light unit 124 may be inserted into the second avoidance area 138. The second light guide sheet 110 is disposed in the second hollowed-out area 136, and the second light unit 126 is also inserted into the second hollowed-out area 136 to be adjacent to the second light guide sheet 110; as shown in FIG. 14, the second shielding sheet 116 blocks the first light unit 124 and the second light guide sheet 110, and the second illumination beam B2 provided by the second light unit 126 can be transmitted to the second light shielding sheet 106 via the second light guide sheet 110 in the second hollowed-out area 136, while the first illumination beam B1 provided by the first light unit 124 is blocked by the second avoidance area 138 and does not enter the second light guide sheet 110.

In addition, the light-transmitting cover 118 can be disposed above the second light-shielding sheet 106 and has a touch area 140 corresponding to the character hole 128 and the opening 130. The light-transmitting cover 118 covers the internal electronic and optical components of the touch-type luminous key 100 to provide dustproof and waterproof protection functions; the touch area 140 can be defined as the central area of the light-transmitting cover 118, but the actual application is not limited to this. The reflective sheet 112 is an optional accessory, which is disposed between the circuit substrate 102 and the first light guide sheet 108 to improve the luminous brightness of the touch-type luminous key 100. In other variations of the present invention, a reflective coating (not shown in the attached figure) can also be disposed on the upper surface of the circuit substrate 102 as the reflective sheet 112, which can also effectively improve the luminous brightness of the touch-type luminous key 100.

Furthermore, the control unit 122 can be electrically connected to the first light emitting unit 124 and the second light emitting unit 126 of the circuit substrate 102 , and the touch module 120 is electrically connected to the control unit 122 and is disposed adjacent to the light-transmissive cover 118 . As shown in FIG. 9 , when the touch-type luminous key 100 is in a standby state without being pressed, the control unit 122 drives the first luminous unit 124 to emit the first illumination beam B1. The first illumination beam B1 is guided by the first light guide sheet 108 and passes through the character holes 128 of the first light shielding sheet 104, the second light guide sheet 110, the opening 130 of the second light shielding sheet 106, and the light-transmitting cover 118. The user can see that the character holes 128 of the touch-type luminous key 100 present the color of the first illumination beam B1. At this time, the second luminous unit 126 does not output the second illumination beam B2.

If the touch area 140 of the touch luminous key 100 is pressed, the touch module 120 can output a corresponding touch signal, and the control unit 122 will further drive the second light unit 126 to emit a second illumination beam B2. The second illumination beam B2 can pass through the opening 130 of the second light shielding sheet 106 and the light-transmitting cover 118 under the guidance of the second light guide sheet 110; the user can see that the touch luminous key 100 simultaneously presents the colors of the first illumination beam B1 and the second illumination beam B2, for example, the outline of the character hole 128 presents the color of the first illumination beam B1, and the outline of the opening 130 presents the color of the second illumination beam B2, as shown in Figure 10.

Please refer to FIG. 15 and FIG. 16. FIG. 15 is a schematic diagram of components of the touch-type light-emitting function key bar 150 of the embodiment of the present invention, and FIG. 16 is a functional block diagram of the touch-type light-emitting function key bar 150 of the embodiment of the present invention. The touch-type light-emitting function key bar 150 may include a circuit substrate 152, a first light shielding sheet 154, a second light shielding sheet 156, a light guide assembly 158, a light-transmitting cover 160, a first shielding sheet 162, a second shielding sheet 164, a reflective sheet 166, a touch module 168, and a control unit 170. The circuit substrate 152 may have a plurality of first light-emitting units 172 and a plurality of second light-emitting units 174. The first light emitting units 172 each provide a first illumination beam, and the second light emitting units 174 each provide a second illumination beam of a color different from the first illumination beam; for example, the first illumination beam and the second illumination beam may be white light and green light, respectively, but the actual application is not limited thereto. In this embodiment, each first light emitting unit 172 is arranged in pairs with another corresponding second light emitting unit 174, and the spacing between each pair of light emitting units (including a first light emitting unit 172 and a corresponding second light emitting unit 174) and another adjacent pair of light emitting units is determined according to the function key requirements on the touch-type light emitting function keypad 150. The first light shielding sheet 154 is located on the circuit substrate 152 and may have a plurality of character holes 176, the positions of which correspond to the plurality of pairs of light emitting units. The second light shielding sheet 156 is located above the first light shielding sheet 154 and has a plurality of openings 178 corresponding to the character holes 176. The number of the character holes 176 and the openings 178 depends on the number of the first light emitting units 172 or the second light emitting units 174.

The light guide assembly 158 may include a plurality of light guide bodies, such as a first light guide body 180 and a second light guide body 182. The light guide assembly 158 of this embodiment may also include other light guide bodies, but only the first light guide body 180 and the second light guide body 182 are used for illustration, and the total number of light guide bodies corresponds to the number of character holes 176 or openings 178. The first light guide body 180 may have a first lower light guide unit 184 and a first upper light guide unit 186. The first lower light guide unit 184 may be disposed between the first light shielding sheet 154 and the circuit substrate 152, and is used to guide the first illumination light beam of the first light emitting unit 172 to pass through the corresponding character hole 176 (e.g., character F1). The first upper light guide unit 186 is disposed between the second light shielding sheet 156 and the first light shielding sheet 154, and is used to guide the second illumination beam of the second light emitting unit 174 to be projected onto the corresponding opening 178 (the opening 178 associated with the character F1) when the first light emitting unit 172 outputs the first illumination beam through the character hole 176 (e.g., the character F1). The second light guide body 182 may be adjacent to and separated from the first light guide body 180, and includes a second lower light guide unit 188 and a second upper light guide unit 190. The second lower light guide unit 188 may be disposed between the first light shielding sheet 154 and the circuit substrate 152, and is used to guide the first illumination beam of the first light emitting unit 172 to pass through the corresponding character hole 176 (e.g., the character F2). The second upper light guide unit 190 is disposed between the second light shielding sheet 156 and the first light shielding sheet 154, and is used to guide the second illumination beam of the second light emitting unit 174 to be projected onto the corresponding opening 178 (the opening 178 associated with the character F2) when the first illumination beam outputted by the first light emitting unit 172 passes through the character hole 176 (e.g., the character F2).

As shown in FIG. 15 , each first light guide body 180 can be connected to an adjacent second light guide body 182 in a spaced manner to form a light guide sheet. For example, the first lower light guide unit 184 and the second lower light guide unit 188 are integrally formed and combined with each other to form a first light guide sheet 192, and the first upper light guide unit 186 and the second upper light guide unit 190 are integrally formed and combined with each other to form a second light guide sheet 194. In a possible embodiment of the present invention, the first light guide sheet 192 may include a plurality of bridge portions 200 having a first section 196 and a second section 198 that are relatively bent, and each bridge portion 200 is disposed between the adjacent first light guide body 180 and the second light guide body 182. The first section 196 of each bridge portion 200 is connected between the first lower light guide unit 184 and the second section 198, and the second section 198 is connected between the second lower light guide unit 188 and the first section 196. Correspondingly, the second light guide sheet 194 also has a similar bridge portion, which will not be repeated here.

The first shielding sheet 162 may be covered on the outer periphery of the first light guide sheet 192 to shield between the second light emitting unit 174 and the first light guide sheet 192; the second shielding sheet 164 may be covered on the outer periphery of the second light guide sheet 194 to shield between the first light emitting unit 172 and the second light guide sheet 194. In this embodiment, the first shielding sheet 162 is only disposed on the edge of the first light guide sheet 192 adjacent to the second light emitting unit 174, and the second shielding sheet 164 is only disposed on the edge of the second light guide sheet 194 adjacent to the first light emitting unit 172, but the actual application is not limited thereto. For example, the first shielding sheet 162 can also completely cover the first light guide sheet 192; as long as it can block the first light guide sheet 192 and the second light emitting unit 174 and does not affect the first illumination light beam of the first light emitting unit 172 entering the first light guide sheet 192, it meets the design purpose of the first shielding sheet 162 of the present invention. The second shielding sheet 164 also has the same design requirements, and will not be repeated here.

The light-transmissive cover 160 is disposed on the second light-shielding sheet 156 and has a plurality of touch areas 202 corresponding to the character holes 176, for the user to press and touch to activate the corresponding function keys on the touch-type luminous function keypad 150. The reflective sheet 166 is an optional accessory, which is disposed on the circuit substrate 152; as described in the previous embodiment, the touch-type luminous function keypad 150 can also be provided with a reflective coating (not shown in the attached figure) on the upper surface of the circuit substrate 152 as the reflective sheet 166, and the variation depends on the design requirements. The control unit 170 can be electrically connected to the first light-emitting unit 172 and the second light-emitting unit 174 of the circuit substrate 152. The touch module 168 can be electrically connected to the control unit 170 and is adjacent to the light-transmitting cover 160.

When the touch-type luminous function keypad 150 is not pressed, the control unit 170 drives the corresponding first light-emitting units 172 of all function keys to emit a first illumination light beam, which is guided by the first light guide plate 192 and passes through the character holes 176 of the first light-shielding plate 154. Different function keys on the touch-type luminous function keypad 150 have character holes 176 of different shapes, which all display the color of the first illumination light beam. When one or more function keys of the touch-type luminous function key array 150 (equivalent to one or more touch areas 202 of the light-transmitting cover 160 being triggered) are pressed, the touch module 168 can output a corresponding touch signal, and the control unit 170 can also drive the corresponding second light-emitting unit 174 of the triggered function key to emit a second illumination beam, which can be guided by the second light guide sheet 194 and pass through the corresponding opening 178 of the second light shielding sheet 156, so that the triggered function key can simultaneously present the colors of the first illumination beam and the second illumination beam.

In summary, the backlight module of the present invention is designed to be a multi-key light guide plate having a plurality of light guide bodies and a bridge portion. The plurality of light guide bodies are adjacent to each other and have intervals therebetween, and the bridge portion is connected to the adjacent light guide bodies so that the multi-key light guide plate can be easily assembled. The light guide body can be designed into a rectangular structure, a diamond structure, a circular structure, a polygonal structure, and the like. The bridge portion can be designed into a variety of styles, such as a C-shaped structure, an S-shaped structure, a W-shaped structure, an M-shaped structure, or a concave-convex structure. The bridge portion is further divided into a plurality of relatively bent sections, and the bridge portion is connected to the light guide body in a relatively bent manner. Therefore, the multi-key light guide plate is designed with a circuitous bridge portion between adjacent light guide bodies, and its width is approximately 0.1 mm to 2 mm, which can effectively increase the number of reflections and absorptions during light transmission to prevent light from being transmitted to other light guide bodies, thereby achieving the design purpose of no light leakage. Furthermore, the present invention can also design a multi-layer stacked shading sheet and light guide sheet on the touch-type luminous key, and configure a plurality of luminous units that match the number of layers of the shading sheet and the light guide sheet, so that the touch-type luminous key can not only emit backlight illumination when in standby mode, but also emit another type of prompt illumination different from the backlight illumination when pressed to provide light interaction; accordingly, the present invention Mingke can further apply the multi-key light guide sheet to the touch-type luminous function keyboard. When the touch-type luminous function keyboard is in standby mode, all function keys will emit backlight illumination. When a specific function key is pressed, it can emit another type of prompt illumination different from the backlight illumination, thereby enhancing the design texture of the touch-type luminous keys and the luminous keyboard used in the touch-type luminous function keyboard.

The above is only the preferred embodiment of the present invention. All equivalent changes and modifications made within the scope of the patent application of the present invention shall fall within the scope of the present invention.

100: Touch-type light-emitting button

102: Circuit board

104: First shading sheet

106: Second shading sheet

108: First light guide plate

110: Second light guide plate

112: Reflective sheet

114: First shielding sheet

116: Second shielding sheet

118: Translucent cover

124: First light-emitting unit

126: Second light-emitting unit

128: Character hole

130: Open mouth

140: Touch area

B1: First illumination beam

B2: Second illumination beam

Claims (18)

A touch-type light-emitting key, comprising: a circuit substrate, on which a first light-emitting unit and a second light-emitting unit are arranged, the first light-emitting unit provides a first illumination beam, and the second light-emitting unit provides a second illumination beam of a color different from the first illumination beam; a first light-shielding sheet, having a character hole; a first light-guiding sheet, arranged between the circuit substrate and the first light-shielding sheet, for guiding the first illumination beam to pass through the character hole; a second light-shielding sheet, located above the first light-shielding sheet, having an opening corresponding to the character hole; a second light-guiding sheet, arranged between the second light-shielding sheet and the first light-shielding sheet, for guiding the second illumination beam to be projected onto the opening when the first illumination beam passes through the character hole and the opening; a first shielding sheet, shielding between the second light-emitting unit and the first light-guiding sheet; and A second shielding plate is provided between the first light emitting unit and the second light guide plate; wherein the first shielding plate has a first hollowing area and a first avoidance area which are independent of each other, the second light emitting unit is inserted into the first avoidance area, the first light guide plate is arranged in the first hollowing area, and the first light emitting unit is inserted into the first hollowing area to be adjacent to the first light guide plate. A touch-sensitive luminous key as described in claim 1, wherein the opening is a circular opening, a polygonal opening, or an irregular opening, located above the character hole, and an opening area of the opening is larger than a maximum outline size of the character hole. The touch-sensitive luminous key as described in claim 1 further comprises: A control unit electrically connected to the circuit substrate, the control unit activates the second luminous unit to output the second luminous beam when the first luminous unit is activated to output the first luminous beam and receives a touch signal. The touch-type luminous key as described in claim 3 further comprises: A light-transmitting cover disposed above the second light-shielding sheet, having a touch area corresponding to the character hole; and A touch module electrically connected to the control unit and adjacent to the light-transmitting cover, for outputting the touch signal when the touch area is triggered. A touch-sensitive light-emitting key as described in claim 1, wherein the second shielding plate has a second hollow area and a second avoidance area which are independent of each other, the first light-emitting unit is inserted into the second avoidance area, the second light-guiding plate is arranged in the second hollow area, and the second light-emitting unit is inserted into the second hollow area to be adjacent to the second light-guiding plate. The touch-sensitive luminous key as described in claim 1 further comprises: A reflective sheet disposed between the circuit substrate and the first light guide sheet. A touch-sensitive luminous key as described in claim 1, wherein the circuit substrate has a reflective coating. A touch-type luminous function keyboard comprises: A circuit substrate, on which at least two first luminous units and at least two second luminous units are arranged, each of the first luminous units provides a first illumination beam, each of the second luminous units provides a second illumination beam of a color different from the first illumination beam, and one of the first luminous units and the second luminous unit corresponding to one of the second luminous units are arranged in pairs; A first light shielding sheet having at least two character holes; A second light shielding sheet, located above the first light shielding sheet, having at least two openings corresponding to the character holes; and A light guide assembly, comprising: A first light guide body, comprising a first lower light guide unit and a first upper light guide unit, wherein the first lower light guide unit is disposed between the first light shielding sheet and the circuit substrate, and is used to guide the first illumination beam of one of the first light emitting units to pass through one of the character holes, and the first upper light guide unit is disposed between the second light shielding sheet and the first light shielding sheet, and is used to guide the second illumination beam of the corresponding second light emitting unit to be projected onto one of the openings when the one of the first light emitting units outputs the first illumination beam; and A second light guide body, adjacent to and separated from the first light guide body, the second light guide body includes a second lower light guide unit and a second upper light guide unit, the second lower light guide unit is disposed between the first light shielding sheet and the circuit substrate, and is used to guide the first illumination beam of another first light guide unit of the first light emitting units to pass through another character hole of the character holes, and the second upper light guide unit is disposed between the second light shielding sheet and the first light shielding sheet, and is used to guide the second illumination beam of another second light guide unit of the second light emitting units to be projected onto another opening of the openings when the other first light emitting unit outputs the first illumination beam. A touch-type light-emitting function keypad as described in claim 8, wherein the first lower light guide unit and the second lower light guide unit form a first light guide sheet, and the first upper light guide unit and the second upper light guide unit form a second light guide sheet. A touch-type light-emitting function keypad as described in claim 9, wherein the first light guide plate further includes a bridge portion having a first section and a second section that are bent relative to each other, the first section being connected between the first lower light guide unit and the second section, and the second section being connected between the second lower light guide unit and the first section. A touch-sensitive luminous function keypad as described in claim 8, wherein any one of the openings is a circular opening, a polygonal opening, or an irregular opening, located above a corresponding character hole of the character holes, and an opening area of any one of the openings is larger than a maximum outline dimension of the corresponding character hole. The touch-type light-emitting function keypad as described in claim 8 further comprises: A control unit electrically connected to the circuit substrate, the control unit causing one of the second light-emitting units corresponding to the touch signal to output the second light-emitting beam when the first light-emitting units are activated to output the first light-emitting beam and receive a touch signal. The touch-type luminous function keyboard as described in claim 12 further comprises: A light-transmitting cover, disposed above the second light-shielding sheet, having at least two touch areas corresponding to the character holes; and A touch module, electrically connected to the control unit and adjacent to the light-transmitting cover, for outputting the touch signal when one of the touch areas is triggered, so as to drive the second light-emitting unit associated with the triggered touch area to output the second illumination beam. The touch-sensitive light-emitting function keypad as described in claim 9 further comprises: a first shielding plate, blocking between the second light-emitting units and the first light-guiding plate; and a second shielding plate, blocking between the first light-emitting units and the second light-guiding plate. A touch-sensitive luminous function keypad as described in claim 14, wherein the first shielding film is wrapped around the outer periphery of the first light guide film. A touch-sensitive luminous function keypad as described in claim 14, wherein the second shielding film is wrapped around the outer periphery of the second light guide film. The touch-sensitive luminous function keypad as described in claim 8 further comprises: A reflector disposed on the circuit substrate. A touch-sensitive luminous function keyboard as described in claim 8, wherein the circuit substrate has a reflective coating.

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