Patent Application
20150234233
The present disclosure relates to backlight apparatuses.
Many display devices, such as liquid crystal displays (LCDs) or digital micro-mirror devices (DMDs), use light valves which are backlit, side-lit or front-lit. In a backlit light valve display, such as an LCD, a backlight is positioned behind a liquid crystal panel. The backlight radiates light through the LC panel, which modulates the light to register an image.
Implementations of the present technology will now be described, by way of example only, with reference to the attached figures.
It will be appreciated that for simplicity and clarity of illustration, where appropriate, reference numerals have been repeated among the different figures to indicate corresponding or analogous elements. In addition, numerous specific details are set forth in order to provide a thorough understanding of the embodiments described herein. However, it will be understood by those of ordinary skill in the art that the embodiments described herein can be practiced without these specific details. In other instances, methods, procedures and components have not been described in detail so as not to obscure the related relevant feature being described. Also, the description is not to be considered as limiting the scope of the embodiments described herein. The drawings are not necessarily to scale and the proportions of certain parts have been exaggerated to better illustrate details and features of the present disclosure.
Several definitions that apply throughout this disclosure will now be presented.
The term “coupled” is defined as connected, whether directly or indirectly through intervening components, and is not necessarily limited to physical connections. The connection can be such that the objects are permanently connected or releasably connected. The term “substantially” is defined to be essentially conforming to the particular dimension, shape or other word that substantially modifies, such that the component need not be exact. For example, substantially cylindrical means that the object resembles a cylinder, but can have one or more deviations from a true cylinder. The term “comprising” when utilized, means “including, but not necessarily limited to”; it specifically indicates open-ended inclusion or membership in the so-described combination, group, series and the like.
The present disclosure is described in relation to a backlight apparatus comprising a backlight module. The backlight module comprises a light member, a light guiding member, a baffle-board and an astigmatism board. The light guiding member is used to guide lights or direct lights emitted by the light member and comprises a first guiding surface and a second guiding surface opposite to the first guiding surface. The baffle-board is attached to the first guiding surface, and the astigmatism board is adhered to the second guiding surface. The lights extending through the first guiding surface is reflected back to the light guiding member by the baffle-board for increasing the brightness of the light guiding member, and the direct lights extending through the second guiding surface is changed to diffused lights by the astigmatism board for allowing the backlight module to be seen in different views.
The backlight module 10 can comprises a circuit board 11, two light members 12, a securing panel 13, a connecting member 14, a light guiding member 15, a baffle-board 16, an astigmatism board 17, and a shielding member 18. The two light members 12 are coupled to the circuit board 11 for emitting lights. In at least one embodiment, the two light members 12 are symmetric set on the circuit board 11, so that the lights from the two light members 12 are evenly. Each light member 12 can be a light emitting diode. A first end of the connecting member 14 is connected to the circuit board 11, a second end of the connecting member 14 can be connected to a motherboard (not shown) in the electronic device, such that the motherboard can supply power for the circuit board 11. The securing panel 13 can be adhered to the circuit board 11. Two through holes 131, for allowing the two light members 12 to extend through, are defined in the securing panel 13.
The light guiding member 15 is used to guide the lights emitted by the two light members 12 and comprises a first guiding surface 151, a second guiding surface 153 opposite to the first guiding surface 151, and two side surfaces 155 coupled to the first guiding surface 151 and the second guiding surface 153. A receiving portion 1531 is defined in the second guiding surface 153 for attaching the two light members 12. In at least one embodiment, the light guiding member 15 is semitransparent. The baffle-board 16 can press fit on the first guiding surface 151, so that lights extending through the first guiding surface 151 can be reflected back to the light guiding member 15 for increasing the brightness of the light guiding member 15. The astigmatism board 17 can be adhered to the second guiding surface 153, so that direct lights extending through the second guiding surface 153 can be changed to diffused lights for allowing the backlight module to be seen in different views. The shielding member 18 can be secured to the four side surfaces 155 for prevent the lights extending through the four side surfaces 155 from emitting out of the guiding member 15.
The mounting tray 20 comprises a frame 21 and two side portions 23 extending from opposite sides of the frame 21. An opening 211 is defined in the frame 21, and the connecting member 14 can extend through the opening 211. Each side portion 23 is substantially U-shaped to form a sliding passage 231, and opposite sides of the backlight module 10 can be slidably received in the sliding passages 231 and then the backlight module 10 can be slid relative to the mounting tray 20.
In use, the connecting member 14 is connected to the motherboard of the electronic device, so that the motherboard can supply power for the circuit board 11 to light the two light members 12. The light emitted by the two light members 12 can emit into the light guiding member 15. Lights extending through the first guiding surface 151 are reflected back to the light guiding member 15 by the baffle-board 16 for increasing the brightness of the light guiding member 15. Lights extending through the second guiding surface 153 are changed to diffused lights by the astigmatism board 17 for allowing the backlight module 10 to be seen in different views. Lights extending through the four side surfaces 155 are prevent by the shielding member 18 from emitting out of the guiding member 15.
The embodiments shown and described above are only examples. Many details are often found in the art such as the other features of a circuit board. Therefore, many such details are neither shown nor described. Even though numerous characteristics and advantages of the present technology have been set forth in the foregoing description, together with details of the structure and function of the present disclosure, the disclosure is illustrative only, and changes may be made in the detail, especially in matters of shape, size and arrangement of the parts within the principles of the present disclosure up to, and including the full extent established by the broad general meaning of the terms used in the claims. It will therefore be appreciated that the embodiments described above may be modified within the scope of the claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2014100513318 | Feb 2014 | CN | national |
