Abstract:
A light emitting device for a light-transmissive picture includes a casing with the light-transmissive picture placed therein, a background light source unit in the housing; and a power supply supplying electrical power to the background light source for emitting a light, whereby the light-transmissive picture can be illuminated for better visibility. The light emitting device further comprises a decorative light source and a controller for controlling the decorative light source.

Description:
FIELD OF THE INVENTION  
       [0001]     The present invention relates to a light emitting device for light-transmissive picture, especially to a compact light emitting device for transparent picture and having versatile usage.  
       BACKGROUND OF THE INVENTION  
       [0002]     Image can convey more abundant meaning and concept than word can do. Conventionally, image playing device such as slide projector is used for presentation or demonstration.  
         [0003]     As the progress of semiconductor manufacture skill, various innovations are developed to enrich the display and image-fetching field. For example, the digital camera is popular due to the maturity of charge coupled device (CCD) and the breaking through of while LED also provide new product idea.  
         [0004]     For nowadays promotion advertisement or souvenir, photo or picture are usually adopted. However, the photo or picture are dull due to lack of sound and lightening effect.  
       SUMMARY OF THE INVENTION  
       [0005]     It is an object of the present invention to provide a compact light emitting device for transparent picture and having versatile usage.  
         [0006]     To achieve the above objects, the present invention provides a light emitting device for a light-transmissive picture includes a casing with the light-transmissive picture placed therein, a background light source unit in the housing; and a power supply supplying electrical power to the background light source for emitting a light, whereby the light-transmissive picture can be illuminated for better visibility. The light emitting device further comprises a decorative light source and a controller for controlling the decorative light source.  
         [0007]     According to one aspect of the present invention, the light emitting device further comprises voice IC or audio IC for better sound effect.  
         [0008]     According to another aspect of the present invention, the light emitting device according to the present invention can be embodied in the form of tie clip or earring.  
         [0009]     According to still another aspect of the present invention, the light emitting device according to the present invention can be integrated into watch or mobile phone, which are portable to user. The light emitting device according to the present invention also can be integrated to CD box or souvenir to increase the value thereof. The light emitting device  1  according to the present invention can also be assembled in plural form for decoration or use with mobile phone for incoming call notice.  
         [0010]     The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawing, in which: 
     
    
     BRIEF DESCRIPTION OF DRAWINGS  
       [0011]      FIG. 1  shows a front view of the light emitting device for light-transmissive picture according to the first preferred embodiment of the present invention;  
         [0012]      FIG. 2  shows a sectional view of the light emitting device for light-transmissive picture according to the first preferred embodiment of the present invention;  
         [0013]      FIG. 3  shows a block diagram of the light emitting device for light-transmissive picture according to the second preferred embodiment of the present invention;  
         [0014]      FIG. 4  shows a front view of the light emitting device for light-transmissive picture according to the third preferred embodiment of the present invention; and  
         [0015]      FIG. 5  shows a front view of the light emitting device for light-transmissive picture according to the fourth preferred embodiment of the present invention. 
     
    
     DETAILED DESCRIPTION OF THE INVENTION  
       [0016]      FIG. 1  shows a front view of the light emitting device for light-transmissive picture according to the first preferred embodiment of the present invention, and  FIG. 2  shows a sectional view of the light emitting device for light-transmissive picture according to the first preferred embodiment of the present invention. The light emitting device  1  for light-transmissive picture according to the present invention mainly comprises a casing  10 , a plurality of light sources  32 ,  34  and a controller  40 .  
         [0017]     As shown in  FIG. 2 , the casing  10  comprises a hollow front shell  12  and a rear shell  14 . A plurality of retainers  16  is formed at rear side of the front shell  12  to define a recess  13  between the front shell  12  and the rear shell  14 . The recess  13  is used to accommodate a light-transmissive picture  20 . The light-transmissive picture  20  can be glass plate, acrylic plate, plastic plate or positive film plate. In the first preferred embodiment of the present invention, the light-transmissive picture  20  is a positive film plate.  
         [0018]     With reference again to  FIG. 1 , the light sources include a background light source  32  mounted on the rear shell  14  and electrically connected to the controller  40 , and a decorative light source  34  mounted on a front peripheral surface of the hollow front shell  12  and also electrically connected to the controller  40 . The electrically connected to the controller  40  is electrically connected to a battery  42  besides connecting to the background light source  32  and the decorative light source  34 . The battery  42  provides electric power to the controller  40 , the background light source  32  and the decorative light source  34 .  
         [0019]     As shown in  FIG. 1 , after turning on a switch (not shown), electrical power is supplied from the battery  42  to the background light source  32  such that the light-transmissive picture  20  can be more clearly displayed. The background light source  32  can be, for example, white light LED. Moreover, a light-sensitive switch (not shown) can be provided on the light emitting device for light-transmissive picture. Therefore, the background light source  32  can be automatically turned on instead of manually turning on in a dark place. The controller  40  can be programmed to control a flashing mode of the decorative light source  34 . The decorative light source  34  can be LED or primitive color (red, blue or green color), or LED of other colors to enhance decorative effect of the light emitting device for light-transmissive picture.  
         [0020]      FIG. 3  shows a block diagram of the light emitting device  1  for light-transmissive picture according to the second preferred embodiment of the present invention. The light emitting device  1  has similar components as that shown in the first preferred embodiment except that the controller  40  is composed of a background light controller  40 A and a decorative light controller  40 B for controlling the background light source  32  and the decorative light source  34 , respectively. The light emitting device  1  further comprises a voice IC  44  connected to a loudspeaker  46 . The voice IC  44  can be controlled by the e controller  40  to speak a predetermined speech. The voice IC  44  can also be replaced by an audio IC to play music.  
         [0021]      FIG. 4  shows a front view of the light emitting device  1  for light-transmissive picture according to the third preferred embodiment of the present invention. The light emitting device  1  shown in  FIG. 4  comprises a casing  10  and a plurality of light sources  33 ,  34  inducing background light source  33  and decorative light source  34 . The background light sources  33  are arranged on both sides of a rear shell  14  of the casing  10  and electrically connected to a battery  42  of a controller for obtaining electrical power therefrom. The background light source  33  emits light toward both sides of a light-transmissive picture  20  for manifest the display of the light-transmissive picture  20 .  
         [0022]     With reference to  FIGS. 2 and 5 ,  FIG. 5  shows a front view of the light emitting device  1  for light-transmissive picture according to the fourth preferred embodiment of the present invention. The light emitting device  1  according to this embodiment has similar components as previously embodiments. The light emitting device  1  shown in  FIG. 5  comprises a casing  10  and a plurality of light sources  33 ,  34  and  35  inducing background light source  33 ,  35  and decorative light source  34 . The background light sources  33 ,  35  are arranged on a rear shell  14  of the casing  10  and on peripheral locations with respect to the light-transmissive picture  20 . The background light source  33 ,  35  emits light toward peripheral sides of a light-transmissive picture  20  for manifest the display of the light-transmissive picture  20 .  
         [0023]     In application, the light emitting device  1  according to the present invention can be embodied in the form of tie clip or earring. For example, user can place idol&#39;s photo in the form of the light-transmissive picture  20  on the light emitting device  1  when they attend a party. The light emitting device  1  with idol&#39;s photo can create fantastic effect.  
         [0024]     Moreover, the light emitting device  1  according to the present invention has the advantage of miniature size. Therefore, the light emitting device  1  according to the present invention can be integrated into watch or mobile phone, which are portable to user. The light emitting device  1  according to the present invention also can be integrated to CD box or souvenir to increase the value thereof. The light emitting device  1  according to the present invention can also be assembled in plural form for decoration or use with mobile phone for incoming call notice.  
         [0025]     Although the present invention has been described with reference to the preferred embodiment thereof, it will be understood that the invention is not limited to the details thereof. Various substitutions and modifications have suggested in the foregoing description, and other will occur to those of ordinary skill in the art. For example, the background light source and decorative light source can also adopt EL light source. The light-transmissive picture can be attached to a front face of the light emitting device. Therefore, all such substitutions and modifications are intended to be embraced within the scope of the invention as defined in the appended claims.