Abstract:
A real-time data display device for bicycles has a mobile electronic device communicates with an image projection device to transmit real-time data by having a MEMS oscillatory mirror simultaneously operating with a laser diode emitting laser beams, so as to project a real-time image with data to the ground ahead. Information such as calories, distance, time, and navigation can be acquired by the rider and other road users are easily aware of the rider to ensure safety concerns.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Field of the Invention 
         [0002]    The invention relates to real-time data display device for bicycles, particularly to one that can project real-time data images to the ground for its riders. 
         [0003]    2. Description of the Related Art 
         [0004]    As people getting more and more aware of environmental issues, bicycles begin to take its place among the choices for transportation. Therefore, safety in riding bicycles is getting more and more attention as well. There are many different products of warning lights for bicycles on the markets, some of which can even project warning signs for the riders. Such products are designed to be installed to vehicles for both lighting and warning functions. Products with such features can be found in Taiwanese Patent Applications Publication No. M490434 and M392102. 
         [0005]      FIG. 1  is a schematic diagram of an intelligent light  10  for vehicles disclosed in Taiwanese Patent Application Publication No. M490434. The device can project lights IB and a warning sign AP toward the front of a vehicle  11 , so as to light up the roads ahead and to remind other road users for better safety.  FIG. 2  shows a structure of a lighting projector  20  to be installed on a vehicle disclosed in Taiwanese Patent Application Publication No. M392102. It has a housing  21  with a space  22  to dispose a projection module  23  therein that includes a lighting source  231 , a slide  232  with a warning sign, a biconvex lens  233 , and a plane-convex lens  234 . When the lighting source  231  emits lights from the housing  21 , the light goes through the slide  232  and projects the warning sign thereon to the ground toward the front. 
         [0006]    Such devices have limitation of spaces and therefore only a single warning sign can be projected statically, resulting in ineffective warning. Also, such devices cannot provide any other information for its riders during the riding. 
       SUMMARY OF THE INVENTION 
       [0007]    It is a primary object of the present invention to provide a real-time data display device for bicycles that has a mobile electronic device to communicate with a real-time projection device to project real-time data images to the ground ahead to improve problems of a single sign of warning and static projection with features of intelligence, expandability and safety. 
         [0008]    In order to achieve the objects above, the present invention comprises a mobile electronic device and a real-time projection device. 
         [0009]    The mobile electronic device includes a first controller; a first storage unit coupled to said first controller to store and operate an application program data for real-time data display; a display unit coupled to said first controller to display real-time data images; and a first communication unit coupled to said first controller for transmission of the real-time data. 
         [0010]    The real-time projection device projecting images of real-time data of bicycles from said mobile electronic device includes a housing engaging a front frame of a bicycle, including a light emitting hole arranged through a surface thereof; a second controller disposed in said housing; a second communication unit coupled to said second controller in said housing for receiving real-time data from the mobile electronic device; an image processor coupled to said second controller in said housing for processing real-time data transmitted from the mobile electronic device; and converting the data into pixel information; a switch coupled to said second controller in said housing for activating the second controller; a driving circuit coupled to said second controller in said housing for transmitting the pixel information thereto after processed by the image processor; and a laser scanner disposed inside the housing correspondingly to the light emitting hole for projection, including: a laser diode coupled to the driving circuit to convert the pixel information into corresponding laser beams; a collimator disposed in front of the laser diode to project parallel laser beam therethrough; a MEMS oscillatory mirror disposed in front of the collimator for the laser beam to be thereon and reflected therefrom, to linearly scan the pixel information with simple harmonic motion after the laser beam being reflected; and an optical lens disposed correspondingly to the reflected laser beam by the MEMS oscillatory mirror for the pixel information to be converted into real-time data for projection via the optical lens. 
         [0011]    Furthermore, the MEMS oscillatory mirror includes a driver IC and a controller; the controller holds control of driving signals from the driver IC to correspond to signals from the laser beam from the MEMS oscillatory mirror to simultaneously oscillate in two-dimension and receive the signals. The image processor further includes a register for temporary storage of pixel information. The optical lens is either a fθ lens or a f sin θ lens. 
         [0012]    With reference to the structure disclosed above, the first communication unit is a first port and the second communication unit is a second port connecting to the first port by a transmission cable for communication; or the first communication unit is a wireless receiver and the second communication unit is a wireless transmitter for wireless connection thereto. The wireless transmitter and wireless receiver can be Bluetooth transmitter and Bluetooth receiver. 
         [0013]    Additionally, the housing has an engaging portion for the present invention to be disengaged easily from a vehicle. 
         [0014]    In the present invention, the real-time data includes calories, distance, time, and navigation information. The mobile electronic device further includes a first supply unit coupled to the first controller for power supply and the real-time projection device further includes a second supply unit coupled to the second controller and the laser diode for power supply. The mobile electronic device can be a smartphone, a pad, an iPod, or a PDA. 
         [0015]    As stated above, the present invention allows a rider to easily access to the application program via the mobile electronic device. The application program can expand real-time information and transmit the data to the real-time projection device, then project the data image to the ground ahead and deliver dynamic warning signs, featuring intelligence, expandability, and safety. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0016]      FIG. 1  is a schematic diagram of a conventional intelligent light for vehicles; 
           [0017]      FIG. 2  is a schematic diagram illustrating a conventional structure of a projector for vehicles; 
           [0018]      FIG. 3  is a perspective view of the present invention; 
           [0019]      FIG. 4  is a reverse perspective view of  FIG. 3 ; 
           [0020]      FIG. 5  is a block diagram of a mobile electronic device connected with a real-time image projection device according to the present invention; 
           [0021]      FIG. 5A  is a schematic diagram of a laser scanner structure of the present invention; and 
           [0022]      FIG. 6  is a practical application view of the present invention. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
       [0023]    Referring to  FIGS. 3-6 , a preferred embodiment of the present invention, a real-time data display device for bicycles  30  mainly comprises a mobile electronic device  40  and a real-time projection device  50 . 
         [0024]    The mobile electronic device  40  includes a first controller  41 , a first storage unit  42 , a display unit  43 , and a first communication unit  45 . 
         [0025]    The first storage unit  42  is coupled to the first controller  41  to store and operate an application program  43  for real-time data images display. In this embodiment, the real-time data includes calories, distance, time, and navigation information. The display unit  43  is coupled to the first controller  41  to display real-time data images. The first communication unit  45  is coupled to the first controller  41  for transmission of the real-time data. In this embodiment, the mobile electronic device  40  includes smartphones, pads, iPods, and PDAs, and it further includes a first supply unit  46  coupled to the first controller  41  for power supply. 
         [0026]    The real-time projection device  50  includes a housing  51 , a second controller  53 , a second communication unit  54 , an image processor  55 , a switch  56 , a driver circuit  57 , and a laser scanner  58 . 
         [0027]    The housing  51  engages a front frame of a bicycle and includes a light emitting hole  52  arranged through a surface thereof to communicate with the mobile electronic device  40  and project images of real-time data therefrom. Referring to  FIGS. 4 and 6 , in this embodiment, the housing  51  further has an engaging portion  511  for the real-time data display device  30  to be disengaged easily from the bicycle. 
         [0028]    The second controller  53  is disposed in the housing. The second communication unit  54  is coupled to the second controller  53  for receiving real-time data from the mobile electronic device  40 . In the block diagram shown in  FIG. 5 , the first communication unit  45  is a first port and the second communication unit  54  is a second port connecting to the first port by a transmission cable  60  for communication; Or the first communication unit  45  can be a wireless receiver and the second communication unit  54  can be a wireless transmitter for wireless connection thereto. In another embodiment, the wireless transmitter and wireless receiver are Bluetooth transmitter and Bluetooth receiver. 
         [0029]    The image processor  55  is coupled to the second controller  53  for processing real-time data transmitted from the mobile electronic device  40  and converting the data into pixel information. In this embodiment, the image processor  55  further includes a register  551  for temporary storage of pixel information such as calories, distance, time, and navigation. The switch  56  is coupled to the second controller  53  in the housing  51  for activating the second controller  53 . The driving circuit  57  is coupled to the second controller  53  for transmitting the pixel information thereto after processed by the image processor  55 . 
         [0030]    The laser scanner  58  is disposed inside the housing  51  correspondingly to the light emitting hole  52  for projection. With reference to  FIGS. 5 and 5A , the laser scanner  58  includes a laser diode  581 , a collimator  582 , a MEMS oscillatory mirror  583 , and an optical lens  584 . 
         [0031]    The laser diode  581  is coupled to the driving circuit  57  to convert the pixel information into corresponding laser beams. The collimator  582  is disposed in front of the laser diode  581  to project parallel laser beam therethrough. The MEMS oscillatory mirror  583  is disposed in front of the collimator  582  for the laser beam to be thereon and reflected therefrom, to linearly scan the pixel information with simple harmonic motion after the laser bean being reflected. In this embodiment, the MEMS oscillatory mirror  583  includes a driver IC  583   a  and a controller  583   b . The controller  583   b  holds control of driving signals from the driver IC  583   a  to corresponds to signals from the laser beam from the MEMS oscillatory mirror  583  to simultaneously oscillate in two-dimension and receive the signals. 
         [0032]    The optical lens  584  is disposed correspondingly to the reflected laser beam by the MEMS oscillatory mirror  583  for the pixel information to be converted into real-time data for projection therefrom. In this embodiment, the optical lens  584  is either a fθ lens or a f sin θ lens, and the real-time projection device  50  further includes a second supply unit  59  coupled to the second controller  53  and the laser diode  581  for power supply. 
         [0033]    As shown in  FIG. 5A , the laser scanner  58  has a small volume for conveniently disposition in the housing  51 . In an applicable embodiment, the optical lens  584  and the laser diode  581  can be respectively disposed at a front and rear of a tube  521 , and the collimator  582  and the MEMS oscillator mirror can be disposed in-between, forming a module with electrical connection with the driver circuit  57 . 
         [0034]      FIG. 6  is a practical application view of the present invention. Upon activating the application program  43  installed in the mobile electronic device  40 , the real-time data is transmitted to the real-time projection device  50  to temporarily save the data in the register  551  of the processor  55 . With the MEMS oscillator mirror  583  simultaneously conducting simple harmonic motion in two-dimension and reflecting the laser beam, the real-time data in the register  551  is thereby linearly scanned to be converted into images with data, which may contain information of calories, distance, time, or navigation guides to be projected to the ground ahead. A rider is able to switch to different images with data simply by the mobile electronic device  40  and to set up the projection period for the data images. 
         [0035]    With the structures disclosed above, the present invention is able to intelligently control the real-time data image projection to the ground ahead and thereby improve problems of single warning sign and static projection with other features of intelligence, expandability and safety.