Patent Application
20160109091
The subject matter herein generally relates to a backlight assembly, and particularly relates to a backlight assembly for image capturing.
Light source is important for image capturing, brightness, parallelism, and chroma of the light source may affect a definition of images. When the backlight is used to capture image from a back of a workpiece, an outline image of the workpiece is captured. However, backlight is normally a monochromatic light, which has a poor parallelism. When the workpiece is with colors, the colors may interfere the monochromatic light, therefore, the quality of image may be affected.
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 “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 first receiving space 122 includes four side walls 1221; one of the side walls 1221 defines a mounting hole 1223 communicating with the first receiving space 122. The other three side walls 1221 extend outwardly from the first receiving space 122, thereby forming a receiving groove 1225 communicating with the first receiving space 122. The second receiving space 124 includes four peripheral walls 1241; the four peripheral walls 1241 extend outwardly from the second receiving space 124, thereby forming a latching groove 1243 communicating with the second receiving space 124. One of the peripheral walls 1241 defines an opening 1245 for receiving the connecting cable 200. The bottom board 14 fixes the backlight assembly 100 to a platform (not shown). The cooling fin 15 is mounted on the case 12 and adjacent to the second receiving space 124. The cooling fin 15 is configured for dissipating heat from the light source unit 30.
The light source unit 30 is configured for providing light source for the backlight assembly 100. One end of the light source unit 30 is received in the second receiving space 124, the other end is received in the latching groove 1243. The light source unit 30 includes a pedestal 32, a circuit board 33, a LED light source 34, a fixing ring 35, and a condensation lens 37. The pedestal 32 is mounted in the latching groove 1243 and covers the latching groove 1243. The pedestal 32 defines an engaging slot 321 and holds the circuit board 33. When the pedestal 32 is mounted to the latching groove 1243, the opening 1245 communicates with the engaging slot 321. The connecting cable 200 can be inserted through the opening 1245 and received in the engaging slot 321 and further electrically connected to the circuit board 33. One side of the circuit board 33 is coupled to the engaging slot 321, the other side arranges at least one LED light source 34. The circuit board 33 is configured for controlling colors of the light that the LED light source 34 emits, thereby the LED light source 34 can emit light with multiple colors. The fixing ring 35 is fixed in the second receiving space 124 and receives the LED light source 34. One side of the fixing ring 35 resists the circuit board 33; the other side resists the condensation lens 37. The LED light source 34 emits lights to the condensation lens 37. The condensation lens 37 gathers the lights from the LED light source 34 and illuminates on the backlight unit 50.
The backlight unit 50 is configured for processing the lights emitted by the light source unit 30 and emitting out. The backlight unit 50 includes a first lens module 52 and a second lens module 53. The first lens module 52 is mounted in the first receiving space 122, the second lens module 53 is mounted to the case 12 and adjacent to the first lens module 52. The first lens module 52 is configured for converting the lights from the light source 30 to parallel lights. The first lens module 52 includes a cover board 521 and two reflection lenses 523. The cover board 521 is mounted in the receiving groove 1225 and covers the receiving groove 1225. The two reflection lenses 523 are coupled to the cover board 521. In one embodiment, each reflection lens 523 includes two incident surfaces 5231 and an incline surface 5233. The two reflection lenses 523 engage together to form a cube by coupling the incline surface 5233 of each reflection lens 523 together. One of the two incident surfaces 5231 of one reflection lens 523 is coupled to the cover board 521.
The second lens module 53 is configured for emitting the lights that converted by the first lens module 52 to the workpiece (not shown). The second lens module 53 includes a lens holder 532, a transparent piece 533, and a connecting ring 535. The lens holder 532 defines a transparent hole 5325. The lens holder 532 is mounted to the case 12 and the transparent hole 5325 is aligned to the mounting hole 1223. The connecting ring 535 latches the transparent piece 533 into the transparent hole 5325, thereby the transparent piece 533 is aligned with the mounting hole 1223.
The backlight assembly 100 includes the light source unit 30 and the backlight unit 50, and the light source unit 30 includes the LED light source 34 emitting light with multiple colors. The backlight unit 50 adjusts the light to parallel in one direction for capturing images, thereby increasing quality of the images.
It is believed that the embodiments and their advantages will be understood from the foregoing description, and it will be apparent that various changes may be made thereto without departing from the scope of the disclosure or sacrificing all of its advantages, the examples hereinbefore described merely being illustrative embodiments of the disclosure.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201410543647.9 | Oct 2014 | CN | national |
