Patent Application
20100059354
This application claims the priority benefit of Taiwan application serial no. 97134213, filed on Sep. 5, 2008. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of this specification.
1. Field of the Invention
The present invention relates to a keyboard and an electronic device. More particularly, the present invention relates to a keyboard having a lighting film and an electronic device using the same.
2. Description of Related Art
In a current information age, people increasingly depend on electronic devices, and to meet demands of high performance and portability of the electronic devices, the electronic devices, such as notebook computers become indispensable application tools in people's daily life. Generally, a human-machine interface such as a keyboard is disposed on a casing of the notebook computer for a user to input commands, and an internal system of the notebook computer can automatically execute the commands.
To facilitate the user to operate the notebook computer under insufficient environmental lighting, a plurality of light-emitting diodes (LEDs) is generally disposed underneath the keyboard for lighting the keyboard. However, to evenly distribute light provided by the LEDs to each of keys on the keyboard, a light-guiding device has to be applied. Therefore, a whole thickness of the notebook computer is increased. Moreover, since the keys of a conventional keyboard are individually assembled, water or dirt can be dropped into gaps among the keys, and even the keys can be fallen off. In addition, since the LEDs disposed underneath the keyboard do not have a shutdown mechanism according to requirement of the user, the LEDs are kept lighting under a sufficient environmental lighting, which may cause a waste of power.
The present invention is directed to a keyboard, which has a self-illuminating function and a relatively small thickness.
The present invention is directed to an electronic device, which applies a keyboard having a self-illuminating function and a relatively small thickness.
The present invention provides a keyboard including a circuit membrane, a lighting film and a plurality of keycaps. The circuit membrane has a plurality of key contacts. The circuit membrane and the lighting film are stacked, and the lighting film emits light with different wavelengths according to different voltages applied thereon. The keycaps are disposed on the circuit membrane and the lighting film and located above the key contacts.
In an embodiment of the present invention, the keyboard further includes a casing, and the keycaps, the lighting film and the circuit membrane are disposed in the casing.
The present invention provides an electronic device including a host, a display module and a keyboard. The display module is electrically connected to the host. The keyboard is electrically connected to the host. The keyboard includes a circuit membrane, a lighting film and a plurality of keycaps. The circuit membrane has a plurality of key contacts. The circuit membrane and the lighting film are stacked, and the lighting film emits light with different wavelengths according to different voltages applied thereon. The keycaps are disposed on the circuit membrane and the lighting film and located above the key contacts.
In an embodiment of the present invention, the display module is pivotally connected to the host.
In an embodiment of the present invention, the lighting film includes a first electrode layer, a second electrode layer and an electro-luminance (EL) material layer. The EL material layer is disposed between the first electrode layer and the second electrode layer.
In an embodiment of the present invention, each of the keycaps includes a dome-shaped film and a key slice. The dome-shaped film is disposed on the lighting film and the circuit membrane. The key slice is disposed on the dome-shaped film and has a transparent pattern. Moreover, a surface of each of the dome-shaped films that faces the lighting film and the circuit membrane has a bump.
In an embodiment of the present invention, the keyboard further includes a support plate, and the lighting film and the circuit membrane are disposed between the keycaps and the support plate.
In an embodiment of the present invention, the keyboard further includes a light sensor electrically connected to the lighting film for determining to turn on/off the lighting film according to a sensing result.
In an embodiment of the present invention, the keyboard further includes a switch electrically connected to the lighting film for turning on/off the lighting film.
In summary, in the keyboard and the electronic device of the present invention, since the lighting film is applied to illuminate the keyboard, the whole keyboard can be evenly illuminated while only a tiny thickness is increased. Accordingly, the keyboard and the electronic device of the present invention have a self-illuminating function and a relatively small thickness.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, a preferred embodiment accompanied with figures is described in detail below.
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.
Moreover, the keyboard 100 of the present embodiment can serve as an external keyboard for a general desktop computer or a host of the other electronic device. Now, the keyboard 100 can further includes a casing 140. The keycaps 130, the lighting film 120 and the circuit membrane 110 are all disposed in the casing 140, and the keycaps 130 are exposed from the casing 140. Certainly, the keyboard 100 can also be built on a notebook computer, a cell phone or other electronic devices for inputting commands to the hosts of the electronic devices.
In the present embodiment, the lighting film 120 includes a first electrode layer 122, a second electrode layer 124 and an electro-luminance (EL) material layer 126. The EL material layer 126 is disposed between the first electrode layer 122 and the second electrode layer 124 for generating light according to currents provided by the first electrode layer 122 and the second electrode layer 124. In the present embodiment, the lighting film 120 is, for example, located between the keycaps 130 and the circuit membrane 110, though in other embodiments, the circuit membrane 110 can also be located between the keycaps 130 and the lighting film 120. Moreover, material of the first electrode layer 122 and the second electrode layer 124 can be a transparent conductive material such as indium tin oxide (ITO) or other transparent conductive materials. However, the material of one of the first electrode layer 122 and the second electrode layer 124 can also be a non-transparent conductive material, as long as such electrode layer is not required to be transparent. Moreover, the lighting film 120 can also be the other lighting film besides the EL film.
By selecting the luminance material, the lighting film 120 can emit light with different wavelengths according to different voltages applied thereon, for example, blue light and green light. By such means, not only the user can select the light with different wavelengths according to his preference, but also a power state or occurrence of other events can be indicated by changing the wavelength of the light. The voltage exerted to the lighting film 120 can be provided by a battery (not shown) disposed in the keyboard 100. Alternatively, the voltage exerted to the lighting film 120 can be provided by the host connected to the keyboard 100 via a connection line (not shown). The wavelengths of the light emitted from the lighting film 120 can be controlled via a switch key disposed on the keyboard 100. Related commands can be output to the connected host from the keyboard 100, and then the host outputs the corresponding voltages to change the wavelengths of the light emitted from the lighting film 120. Certainly, the host can also change the wavelengths of the light emitted from the lighting film 120 according to a predetermined program, so as to indicate for example, the power state or occurrence of the other events.
In the present embodiment, each of the keycaps 130 includes a dome-shaped film 132 and a key slice 134. The dome-shaped film 132 is disposed on the lighting film 120 and the circuit membrane 110. Since the dome-shaped film 132 is deformable, it can provide a touch sense to the user when being pressed, so that a complicated X-type bracket is unnecessary. Moreover, the dome-shaped films 132 can be fabricated on a same film, which can not only prevent entering of water or dirt, but can also increase a convenience of assembly. Material of the dome-shaped film 132 is for example silicone or other suitable materials. The key slice 134 is disposed on the dome-shaped film 132 and has a transparent pattern P10. In
In addition, the keyboard 100 can further include a light sensor 160 electrically connected to the lighting film 120 for determining to turn on/off the lighting film 120 according to a sensing result. By such means, the lighting film 120 can be automatically turned on under insufficient environmental lighting, and turned off under sufficient environmental lighting, so as to save power. Moreover, the keyboard 100 can also include a switch 170 electrically connected to the lighting film 120 for turning on/off the lighting film 120 according to a selection of the user.
In summary, in the keyboard and the electronic device of the present invention, since the lighting film with a tiny thickness is applied to evenly illuminate the keyboard, the thickness of the keyboard can be relatively small. Moreover, by selecting the luminance material of the lighting film, the lighting film can emit light with different wavelengths according to different requirements. In addition, various integral films are stacked to form the keyboard, so that key gaps can be avoided, and entering of water or dirt can be prevented. Moreover, the light sensor and the switch can be applied to achieve an automatic illumination function or a manual illumination function, so as to save the power.
It will be apparent to those skilled in the art that various modifications and variations can be made to the structure of the present invention without departing from the scope or spirit of the invention. In view of the foregoing, it is intended that the present invention cover modifications and variations of this invention provided they fall within the scope of the following claims and their equivalents.
| Number | Date | Country | Kind |
|---|---|---|---|
| 97134213 | Sep 2008 | TW | national |
