TWI249055B - Double-sided luminescent backlight module with optical color changing effects - Google Patents

Abstract

A double-sided luminescent backlight module with color changing effects includes a transflective sheet mounted on one face of a light guide corresponding to a light emitting face. The transflective sheet includes an optical color changing layer so that most of the lights emitted from a light source are reflected by the transflective sheet and transmitted from the light emitting face. A small portion of the lights go through the transflective sheet and are converted by the optical color changing layer into an output lights with a different color. As a result, the two faces of the light guide will have different colors.

Description

1249055 V. INSTRUCTION DESCRIPTION OF THE INVENTION (1) Technical Field of the Invention The present invention relates to an optical color conversion double-sided illumination backlight module, and more particularly to a backlight module that can use only a single color light source to emit light on both sides of different colors. . [Prior Art] As shown in FIG. 2, a double-sided light-emitting backlight module 8 developed by the present applicant is provided with a semi-transmissive film 8 2 on the back surface of a light guide plate 81, and a light source 8 3 The emitted light is reversed via the transflective film 8 2

Shooting, so that most of the light is emitted from the light exit surface 81 of the light guide plate 8 1 to provide a backlight as the first display module 9 1 , and a small portion of the light passes through the transflective film 8 2 , and It is emitted from the back surface of the light guide plate 81 to provide a backlight as the second display module 92. However, in the above configuration, the light beams emitted from both sides of the light guide plate 81 are of the same color (usually white light). Since the inner main screen of a typical dual-screen mobile phone is usually a color display module, and the small external screen is usually a monochrome display module, if this double-sided light-emitting backlight module 8 is applied to a dual-screen mobile phone When the product is in the same way, it will form a color display on the inner main screen and a black screen on the outside, which will cause the overall texture of the mobile phone to be dull and lack of change.

In order to make the monochrome display module of the small screen appear different colors, it is necessary to set a different set of backlight modules of different colors, or to add a set of color conversion components, both of which will cause a substantial increase in manufacturing costs. And the problem of increased thickness of the backlight module. Therefore, the aforementioned double-sided light-emitting backlight module is necessary to improve

Page 5 1249055 V. INSTRUCTIONS (2) One ~ ' ' to develop a double-sided backlight module that can provide different color backlights. SUMMARY OF THE INVENTION The main purpose of the present invention is to solve the above problems and provide an optical color conversion double-sided light-emitting backlight module, which has an optical color conversion layer in the transflective film. The light of the transflective component is converted into light of different colors, and the double-sided different color illuminating effect can be achieved under the problem of low cost, thinness and light weight. For the purpose of the foregoing, the optical color conversion double-sided illumination backlight module of the present invention comprises a light guide plate having a light incident surface adjacent to

a light source is disposed on the light incident surface, and the light guide plate has a light emitting surface adjacent to the light incident mask, and the light guide plate is provided with a transflective sheet on one side of the light emitting surface, and the transflective sheet contains An optical color conversion layer that converts light passing through the transflective sheet into light of different colors by the optical color conversion layer. The above and other objects and advantages of the present invention will become more apparent from the detailed description of the embodiments illustrated in the <RTIgt; The present invention, of course, is to be construed as being limited in some of the elements or the arrangement of the parts, but the application examples are described in detail in the present specification and the construction thereof is shown in the drawings. [Embodiment]

Referring to Figure 1, the structure of the embodiment selected for use in the present invention is for illustrative purposes only and is not limited by such a patent application. The optical color conversion double-sided illumination backlight module of the embodiment includes

Page 6 1249005 -------- ^ V. Description of the invention (3) A light guide plate 1 having a light source 2 at a surface 1 1 and having a light exit surface 12 and having a read surface a transflective sheet 3 having a transparent substrate 3 1 , the transparent substrate being provided with a semi-transmissive layer 3 2 and a read color conversion layer 3 3 , which is converted into a non-jgj through the color conversion layer 3 3 The optical color conversion &lt; is used when the light-emitting surface 12 is matched with one surface of the transflective sheet 3 to use a single light or less to use the white light green 3, and the transflective layer 3 is incident on the light guide plate 1 due to the light source 2 The transflective layer 32 is reflected, and a small portion of the backlight light as the color display module 4 is transmitted through the transflective layer 3 3 to be converted into pale blue and purple, so that the monochrome display module 5 is presented by the present invention. There is an optical color setting, and it is possible to achieve double-sidedness before using only a single color quantization. The present invention still exists. For example, a half of the transflective sheet has a light incident surface 1 1 adjacent to the light incident surface 1 adjacent to the light incident surface 1 . The light guide plate 1 is opposite to the light exit surface 1 2 , and the transflective sheet 3 is The other side of the structural inclusion material 31 adjacent to the surface of the light guide plate 1 is provided with light that is transparent to the light of the light. The double-sided light-emitting backlight module is used in the color display module 4 and is used in the half-color display module 5. 2 and the orange-yellow optical color conversion layer 3 is a low light transmittance state as an example. Most of the light will be emitted by the light-transmitting surface 12 by the light-reflecting sheet 3 for use; the light source 2 is incident on the light-emitting sheet 1 of the light-guide plate 3, and the orange-colored optical backlight is used for the monochrome display module. 5 light blue-violet background. The transflective sheet 3 of the conversion function is provided with a light source and has the effects of low cost and thin, light color illuminating. Multiple examples, only the details change in the transflective layer, as needed

1249055 V. INSTRUCTIONS (4) Designed to have a light transmittance of 5% to 90%, so that the ratios of different colors of the two sides can be different according to different requirements, so as to enrich the effect of double-sided backlighting. The disclosure of the above-described embodiments is intended to be illustrative of the invention and is intended to be illustrative of the invention. From the above detailed description, it will be apparent to those skilled in the art that the foregoing objects can be achieved, and the requirements of the Patent Law have been met, and the application of the backlight is the same as the color of the patent. BRIEF DESCRIPTION OF THE DRAWINGS [Fig. 1 is a schematic view of the structure of the present invention. Fig. 2 is a schematic view showing the structure of a conventional double-sided light-emitting backlight module. [Illustration] (conventional part) double-sided light-emitting backlight module 8 transflective Film 8 2 light-emitting surface 8 1 1 second display module 9 2 (part of the invention) light guide plate 1 light-emitting surface 1 2 semi-transmissive sheet 3 semi-transmissive layer 3 2 color display module 4 light guide plate 8 1 light source 8 3 First display module 9 1

Light-in surface 1 1 Light source 2 Transparent substrate 3 1 Optical color conversion layer 3 3 Monochrome display module 5

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Claims (1)

1249055 6. Patent application scope 1 · An optical color conversion double-sided illumination backlight module, comprising a light guide plate having a light incident surface, a light source disposed adjacent to the light incident surface, and the light guide plate phase Adjacent to the light-receiving mask, there is a light-emitting surface, and the light-guiding plate is provided with a semi-transmissive sheet on one side of the light-emitting surface, and the transflective sheet contains an optical color conversion layer for passing through the transflective The light of the sheet is converted into light of different colors by the optical color conversion layer. The double-sided illumination (backlight module) of the optical color conversion according to claim 1, wherein the structure of the transflective sheet comprises a transparent substrate, and the transparent substrate is disposed adjacent to one side of the light guide plate. The optically transmissive layer is disposed on the other half of the transparent substrate and on the other side of the transparent substrate.