TWI461626B - Light source device and portable electronic device using the same - Google Patents

Description

Light source device and portable electronic device having the same

The invention relates to a light source device and a portable electronic device having the same.

With the development of electronic technology, portable electronic devices such as mobile phones, digital cameras and personal digital assistants (PDAs) have gradually become a necessity for people's lives. In order to facilitate the use of the portable electronic device in a light-dark environment, the portable electronic device is usually provided with a light-emitting diode or other light source device as a backlight, which can illuminate the keyboard or the display screen for use. .

However, conventional light source devices for portable electronic devices are provided by conventional batteries that directly use portable electronic devices. Obviously, this will additionally consume battery power, which will shorten the battery life cycle.

In view of the above, it is necessary to provide a light source device capable of effectively saving electric energy and a portable electronic device having the same.

A light source device includes a light guiding element, a reflecting element and a light oscillating medium disposed between the light guiding element and the reflective element, the light guiding element comprising an incident area and an exit area, After the light is introduced from the incident region, the light oscillating medium is excited, so that the light oscillating medium generates a plurality of photons, and the photons are in the light guiding element and After continuously reflecting and oscillating between the elements, they have a uniform exit direction and are derived from the exit area. The reflective element and the light guiding element are both plane mirrors, and the mirror parts are both as a reflecting surface, and the reflecting element is The reflecting surface is disposed in parallel with the reflecting surface of the light guiding element, and a resonant cavity is formed therebetween, and the optical oscillating medium is filled in the resonant cavity.

A portable electronic device includes a body and a light source device as described above, and the light source device is disposed in the body.

Compared with the prior art, the light source device in the portable electronic device can receive external light and excite the external light to excite the optical oscillating medium to generate a usable photo before the additional power consumption is required. Bright backlight of the display unit of the portable electronic device. The portable electronic device of the invention helps to reduce the energy consumption of the battery in the portable electronic device, prolongs the battery life cycle, and brings great convenience in use.

100‧‧‧Portable electronic devices

10‧‧‧ Ontology

12‧‧‧Display unit

20‧‧‧Light source device

22‧‧‧Light guiding elements

24‧‧‧reflecting elements

26‧‧‧Light Oscillation Media

28‧‧‧Resonator

30‧‧‧second light source

40‧‧‧ switch

122‧‧‧Light hole

124‧‧‧ concentrating elements

222‧‧‧Injection area

224‧‧‧Outfield

226‧‧‧Into the aperture

228‧‧‧Lighting hole

1 is a block diagram of a functional module of a portable electronic device having a light source device in accordance with a preferred embodiment of the present invention.

2 is a perspective view of a portable electronic device having a light source device according to a preferred embodiment of the present invention.

3 is a cross-sectional view taken along line II-II of the portable electronic device of FIG. 2.

FIG. 4 is a schematic diagram of the optical path of the portable electronic device shown in FIG. 3 generated by the external light.

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

Referring to FIG. 1 and FIG. 2, the light source device of the preferred embodiment of the present invention can be applied to a portable electronic device such as a mobile phone or a personal digital assistant (PDA). In the preferred embodiment of the present invention, The mobile phone is explained as an example.

The portable electronic device 100 of the present invention includes a body 10, a light source device 20, and a second light source 30. The body 10 is a housing of the portable electronic device 100, and is provided with a conventional display unit 12. A plurality of light-transmissive holes 122 penetrating into the interior of the body 10 are defined in the body 10 of the display unit 12, and light from an external light source can enter the interior of the body 10 through the light-transmitting holes 122. The body 10 further includes a plurality of concentrating elements 124 equal to the number of the transparent holes 122. The concentrating elements 124 may be conventional convex lenses, and each concentrating element 124 is correspondingly disposed on each of the transparent holes 122. 10 internal opening. The concentrating element 124 can receive and condense light entering by the light transmission hole 122.

Referring to FIG. 3 together, the light source device 20 can be configured to receive external light such as sunlight and excite the light source device 20 with the received light to generate a backlight that can be used to illuminate the display unit 12. The light source device 20 includes a light guiding element 22, a reflective element 24 and a light oscillating medium 26.

The light guiding element 22 can be a plane mirror whose mirror portion is disposed as a reflecting surface toward the reflecting element 24. The light guiding element 22 includes an incident region 222 disposed at a peripheral portion and an exit region 224 disposed at the central portion. The incident region 222 is opposite to the light transmission hole 122 and the concentrating element 124, and the exit area 224 is opposite to the display unit 12. The incident region 222 is provided with a plurality of light entrance holes 226 for receiving light from the light collecting member 124 and introducing them into the light source device 20. The exit area 224 is provided with a plurality of light exit holes 228 for guiding the backlight generated by the light source device 20 to be illuminated. The unit 12 is shown. The radius of the light exit hole 228 is smaller than the radius of the light entrance hole 226, and the number of the light exit holes 228 is larger than the number of the light entrance holes 226.

The reflective element 24 can be a planar mirror having a mirrored portion that acts as a reflective surface for reflecting light transmitted thereto back into the light source device 20. The reflective surface of the reflective element 24 is disposed in parallel with the reflective surface of the light guiding element 22, and a resonant cavity 28 is formed therebetween. The optical oscillating medium 26 is filled in the resonant cavity 28.

The light oscillating medium 26 may be a bismuth silicate optical glass or other glass-based substrate having the same function, which can realize the population inversion under the illumination condition and generate the stimulated radiation strengthening effect of the light, so that it is introduced into the interior thereof. The photons with relatively uniform exit directions are excited by the light and are strengthened. Referring to FIG. 4 together, when the incident region 222 introduces light into the light source device 20 through the light entrance hole 226 and illuminates the light oscillating medium 26, the light illuminates the light oscillating medium 26 to cause the light oscillating medium 26 to be excited. The population inversion occurs and the stimulated radiation enhancement of the light is generated, that is, the light oscillating medium 26 generates a plurality of photons having different directions, and under the action of the resonant cavity 28, the light is reflected perpendicular to the light guiding element 22 and the reflective element 24. The photons of the surface are continuously increased after being continuously reflected and oscillated by the light guiding element 22 and the reflecting element 24, so that photons in other directions are suppressed. Finally, the photons generated by the optical oscillating medium 26 are formed in the resonant cavity 28 to form a reinforcing light whose transmission direction is substantially perpendicular to the surfaces of the light guiding element 22 and the reflective element 24, that is, approximate to an ideal surface light source, and the light parallelism is relatively high. . Finally, the photon with higher parallelism is directly derived from the light exit hole 228 of the exit area 224, which can be used to illuminate the display unit 12.

Referring to FIG. 3 together, the second light source 30 can be disposed behind the display unit 12 or within the resonant cavity 28 to facilitate illuminating the display unit 12. The second light source 30 can also be installed at any position in the portable electronic device 100 and transmitted by a conventional light guiding device. It is output to a position where the display unit 12 can be illuminated. The second light source 30 can be a conventional light emitting diode (LED) or other light-emitting component for a portable electronic device, and the light is provided by a battery (not shown) inside the body 10. The required electrical energy. When the portable electronic device 100 is unable to receive external light, that is, the light source device 20 is inoperable, the second light source 30 can be activated to directly supply the backlight for the display unit 12 by a conventional battery supply according to a conventional manner. power supply. It will be appreciated that a switch 40 can be provided to select whether or not to use the second source 30. When the portable electronic device 100 is unable to receive external light, the second light source 30 can be turned on by the switch 40, that is, the display unit 12 is provided with a backlight according to a conventional manner; when the portable electronic device 100 can receive an appropriate external In the case of light, the second light source 30 can be turned off by the switch 40, and only the external light source can be used as the backlight source of the display unit 12 to save battery power in the portable electronic device 100.

It can be understood that the light-transmitting hole 122 and the light-collecting element 124 can also be replaced by other conventional light-guiding structures. For example, other parts of the body 10 can be made into a transparent structure that can receive external light, and a conventional guide can be used. The light source or the like introduces the light emitted from the transparent structure into the body 10 into the incident region 222 of the light source device 20, and then into the cavity 28, thereby forming the backlight required for the display unit 12 according to the above method.

Obviously, the light source device 20 in the portable electronic device 100 can receive external light and excite the light source device 20 by using an external excitation force before it is required to consume additional electrical energy, so that it can be used to illuminate The backlight of the display unit 12 of the portable electronic device 100. The portable electronic device of the invention helps to reduce the energy consumption of the battery in the portable electronic device, prolongs the battery life cycle, and brings great convenience in use.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. but The above description is only the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art will be included in the following claims.

10‧‧‧ Ontology

12‧‧‧Display unit

20‧‧‧Light source device

22‧‧‧Light guiding elements

24‧‧‧reflecting elements

26‧‧‧Light Oscillation Media

122‧‧‧Light hole

124‧‧‧ concentrating elements

222‧‧‧Injection area

Claims (8)

A light source device, the light source device comprising a light guiding component, a reflective component and a light oscillating medium disposed between the light guiding component and the reflective component, the light guiding component comprising an incident region and an exiting a region, after the light is introduced from the incident region, the light oscillating medium is excited, so that the light oscillating medium generates a plurality of photons. The photons are continuously reflected and oscillated between the light guiding element and the reflective element, and have a uniform exit direction and are derived from the exit area. The reflective element and the light guiding element are both plane mirrors, and the mirror surface portion is used as a reflecting surface, and the reflecting surface of the reflecting element and the reflecting surface of the light guiding element are arranged in parallel, and a gap is formed between the two. a resonant cavity, the optical oscillating medium being filled in the resonant cavity. The light source device of claim 1, wherein the exit area is disposed at a central portion of the light guiding element, and the incident area is disposed at a periphery of the exit area. The light source device of claim 1, wherein the incident area is provided with a plurality of light entrance holes, and the exit area is provided with a plurality of light exit holes, and the light entrance holes introduce the light into the In the light source device, the light exiting hole leads the photon to the light source device, and a radius of the light entrance hole is larger than a radius of the light exit hole. The light source device of claim 1, wherein the light oscillating medium is a glass-based substrate capable of realizing particle number inversion under illumination conditions and generating stimulated radiation enhancement of light. A portable electronic device comprising a body and a light source device according to any one of claims 1 to 4, wherein the light source device is disposed in the body. The portable electronic device of claim 5, wherein the body is provided with a display unit, and the light exit hole leads the photon to illuminate the display unit. The portable electronic device of claim 5, wherein the body is provided with a light transmission hole and a plurality of light collecting elements, wherein the incident area is opposite to the light transmission hole and the light collecting element, the light is introduced from the light transmission hole, and is concentrated by the light collecting element and transmitted to the incident Area. The portable electronic device of claim 5, wherein the portable electronic device further includes a second light source and a switch, when the portable electronic device can receive external light, The switch turns off the second light source, and the switch turns on the second light source when the portable electronic device cannot receive external light.