Patent Application
20060227547
1. Field of the Invention
The present invention relates to a wavelength combination technology for primary color light emitters of a backlight module, more particularly to a light guider featuring a simple structure, an easy installation, and an effective reduction of the area required by a wavelength combination of primary color light emitters.
2. Description of the Related Art
As a general backlight module primarily combines the wavelength of the lights of three primary color light emitters (such as light emitting diodes): red (R), green (G) and blue (B) to produce a white light effect, the light produced by each primary color light emitter is emitted at an existing angle, and thus it is necessary to diffuse the light of each primary color light emitter 10 by a diffuser 20 for a successful superimposition to combine the wavelengths of the lights of primary color light emitters 10 and achieve a mixed light effect.
Further, when the light of each primary color light emitter 10 passes through a diffuser 20, a single diffuser 10 can only produce a diffusion effect for one time, which will extend the distance of the combination of light waves. In other words, the distance H1 between the light mixing area A and each primary color light emitter 10 is larger. Therefore, there is another prior art that increases the number of diffusers to pass and diffuse the light of each primary color light emitter for several times to shorten the distance of a light wave combination (or reduce the area of light wave combination), so as to lower the costs of related light guide components. However, simply increasing the number of diffusers to shorten the distance of the light wave combination of the primary color light emitters in a practical application is found uneasily to fix the corresponding position of each diffuser, and thus making the installation very complicated. The diffusers have to be stacked with each other, and such arrangement is applicable for low-end applications only.
In view of the foregoing shortcomings of the prior art, a light guider structure of the present invention overcomes the shortcomings of the wavelength combination technology of the primary color light emitters of the foregoing backlight module.
Therefore, it is a primary object of the present invention to provide a light guider to be installed between a primary color light emitter of a backlight module and a display panel assembly. The light guider comprises a light incident surface disposed at a position facing the primary color light emitter and a light emitting surface disposed at a position facing the display panel assembly. With the refraction of a reflective mask, the lights of the primary color light emitters emitted from the incident surface into the light guider are refracted for several times before entering the emitting surface of the display panel assembly at a display panel position.
The whole light guider has a plurality of cones disposed on at least two positions for passing the light through the primary color light emitters, such that the passing lights are diffused and mixed by the cones for at least two times to combine the wavelengths of the lights of primary color light emitters, so as to effectively reduce the area of the wavelength combination of the primary color light emitters and facilitate the improvement of the white light quality of the Whole backlight module. Particularly, with the design of several diffusion and light mixing positions on a single light guider, the number of components required for combining the wavelengths of the primary color light emitters of the backlight module is minimized and the assembly technology for related components is simplified.
Referring to
The emitting surface 42 of the foregoing light guider 40 faces the end position of the panel of the display panel assembly 30, and thus the light of each primary color light emitter 10 is projected from the incident surface 41 into the light guider 40 by the refraction of the reflective mask 50 and entered from the emitting surface 42 into the display panel assembly 30, so as to produce the expected brightness, performance and effect of the whole backlight module.
Referring to
Further, the structure of the light guider 40 is shown in
Before the light of each primary color light emitter 10 enters into the display panel assembly 30, the traveling path of the light is shown in
Particularly, a single light guider 10 installs a plurality of diffusion and light mixing positions to reduce the number of components required for the wavelength combination of the primary color light emitters of the backlight module, and simplify the assembling technology of related components.
In summation of the description above, the present provides another preferred feasible light guider structure, which effectively shortens the area required for combining the wavelengths of the primary color light emitters and effectively improves the white light quality of the backlight module and thus fully complies with the patent application requirements. The description and its accompanied drawings are used for describing preferred embodiments of the present invention, and it is to be understood that the invention is not limited thereto. To the contrary, it is intended to cover various modifications and similar arrangements and procedures, and the scope of the appended claims therefore should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements and procedures.
