Patent Application
20070274181
Referring to the drawings and initially to
A digital disc 1 (such as a compact disc) is placed on the drive member 2. When the control unit 5 sends a reproduction signal to the system processor 3, the system processor 3 delivers the related order to the servo controller 21 which controls the drive member 2 to rotate the digital disc 1 at a constant linear speed and controls the reader 22 to move and read the digital audio information recorded in the digital disc 1. The digital audio information read by the reader 22 is amplified by the high frequency amplifier 23 and then is sent to the signal processor 24 for demodulation and error correction. The processed digital audio information is further controlled by the memory controller 25 and sent to the memory 26. Meanwhile, the digital audio information stored in the memory 26 can be read out by control of the memory controller 25 and then sent to the digital/analogue converter 27 which converts the digital audio information from digital format to analogue format for the purpose of output from the output terminal 29.
The indication unit 4 receives the message from the system processor 3 to indicate the related notices such as reproducing time, number and speed of the digital audio information that is being reproduced.
The control unit 5 includes a push button assembly 6, an operation assembly 7, and a lighting assembly 10.
As shown in
As shown in
The operation assembly 7 further includes a rotation shaft 74 which rotatably penetrates a bushing 75 mounted on the frame 51 and having its upper end secured to the central portion 713 of the first rotation disk 71 to rotate therewith, a retainer 77 secured on the lower end of the rotation shaft 74 to rotate therewith, and an elastic anti-slip member 76 mounted on the rotation shaft 74 and pressed between the retainer 77 and the bottom of the bushing 75 to provide a friction to the retainer 77 to limit rotation of the first rotation disk 71. The central portion 713 of the first rotation disk 71 has its bottom rested on the upper end of the bushing 75 to function as a rotation fulcrum of the first rotation disk 71.
The second rotation disk 72 is located above the first rotation disk 71, and the elastic portion 73 is mounted between the first rotation disk 71 and the second rotation disk 72 to prop up the second rotation disk 72 to keep an elastic distance from the first rotation disk 71. When the second rotation disk 72 is pressed by a pressing force to overcome the elastic force of the elastic portion 73, it gradually approaches the first rotation disk 71. On the contrary, when the pressing force on the second rotation disk 72 is gone, the elastic force of the elastic portion urges the second rotation disk 72 away from the first rotation disk 71.
A first sensor 8 secured on the frame 51 has two optical detection members that detect the passage of the slit portion 712 of the first rotation disk 71 for the purpose of detecting the rotation speed and direction of the first rotation disk 71. When the first sensor 8 detects passage of the slit portion 712 of the first rotation disk 71, the two optical detection members of the first sensor 8 output a first impulse signal “a” and a second impulse signal “b” with phase differential (e.g., the phase differential of the two impulse signals is 90 degrees) to the system processor 3. For clarity, the impulse signals “a” and “b” produced by the first sensor 8 are called a first control signal.
The system processor 3 judges the rotation direction of the first rotation disk 71 according to the phase differential of the two impulse signals “a” and “b”. For example, the phase differential of the two impulse signals “a” and “b” is 90 degrees. Thus, when the first rotation disk 71 is rotated clockwise, the phase differential of the two impulse signals “a” and “b” is +90 degrees, and when the first rotation disk 71 is rotated counterclockwise, the phase differential of the two impulse signals “a” and “b” is −90 degrees. In addition, the system processor 3 judges the rotation speed of the first rotation disk 71 according to the impulse number of either the impulse signal “a” or the impulse signal “b” of the input first control signal at a determined time.
A second sensor 9 preferably is a contact switch. The second sensor 9 is secured on the frame 51 and located under the first rotation disk 71. As shown in
In such a manner, when the second rotation disk 72 is pressed down, the press rods 721 of the second rotation disk 72 touch and press the upper surface layer 91 of the second sensor 9 downward, so that the upper conducting layer 93 is electrically connected to the lower conducting layer 94 to produce a trigger signal to the system processor 3. Next, when the pressing force on the second rotation disk 72 is gone, the second rotation disk 72 is elastically lifted and spaced from the first rotation disk 71 by the pushing of the elastic portion 73 to detach the press rods 721 of the second rotation disk 72 from the upper surface layer 91 of the second sensor 9, and then the upper conducting layer 93 is separated and isolated from the lower conducting layer 94 by the insulating fluid layer 96, thereby stopping producing the trigger signal. For clarity, the trigger signal produced by the second sensor 9 when the second rotation disk 72 is pressed to touch the second sensor 9 is called a second control signal.
The lighting assembly 10 includes a plurality of light emitting members 101 mounted on the frame 51 and enclosed around the periphery of the first rotation disk 71.
During operation, when the first rotation disk 71 is rotated to trigger the first sensor 8 and the second rotation disk 72 is pressed down to trigger the second sensor 9 at the same time, the first control signal produced by the first sensor 8 and the second control signal produced by the second sensor 9 are outputted to the system processor 3 simultaneously. The system processor 3 then controls the memory controller 25 based on the determined rotation speed and rotation direction of the first rotation disk 71. The memory controller 25 controls the readout speed and readout sequence (readout of the digital audio information either by the ascending or descending order of the addresses) of the digital audio information stored in the memory 26. For example, when the first rotation disk 71 is rotated faster than the predetermined speed, the system processor 3 controls the memory controller 25 to accelerate the readout speed of the digital audio information from the memory 26. On the contrary, when the first rotation disk 71 is rotated slower than the predetermined speed, the system processor 3 control the memory controller 25 to slow the readout speed of the digital audio information from the memory 26. Meanwhile, when the first rotation disk 71 is rotated clockwise, the digital audio information stored in the memory 26 is read out in an ascending sequence. On the contrary, when the first rotation disk 71 is rotated counterclockwise, the digital audio information stored in the memory 26 is read out in a descending sequence.
As the manipulation of simultaneously outputting the first and the second signal let the memory controller 25 control the readout speed and readout sequence of the digital audio information stored in the memory 26 on the basis of the rotation speed and rotation direction of the first disk 71, the scratch sound is outputted. Under such so-called scratch operation mode, the lighting assembly 10 shows a first blinking mode by control of the system processor 3, so that a user can visually inspect the scratch operation mode by the first blinking mode.
In addition, when the first rotation disk 71 is rotated to trigger the first sensor 8 and the second rotation disk 72 is not pressed down to trigger the second sensor 9, only the first control signal is produced by the first sensor 8 and outputted to the system processor 3. In such a manner, the system processor 3 then controls the memory controller 25 based on the determined rotation direction of the rotation disk 71. The memory controller 25 controls the readout speed of the digital audio information stored in the memory 26 to be faster or lower than the predetermined speed. For example, when the first rotation disk 71 is rotated clockwise, the digital audio information stored in the memory 26 is readout by the memory controller 25 at a speed faster than the predetermined speed. On the contrary, when the first rotation disk 71 is rotated counterclockwise, the digital audio information stored in the memory 26 is readout by the memory controller 25 at a speed slower than the predetermined speed.
As the manipulation of only outputting the first signal let the memory controller 25 control the readout speed of the digital audio information stored in the memory 26 on the basis of the rotation direction of the first disk 71, the reproducing speed of sound can be faster or slower than the predetermined speed. Under such so-called pitchbend operation mode, the lighting assembly 10 shows a second blinking mode by control of the system processor 3, so that the user can visually inspect the pitchbend operation mode by the second blinking mode.
Moreover, before the first control signal and the second control signal are outputted to the system processor 3, the digital audio information is outputted at the normal reproducing state. When the digital audio signal reproducing device is played at the normal reproducing operation mode, the lighting assembly 10 shows a third blinking mode by control of the system processor 3, so that the user can visually inspect the normal reproducing operation mode by the third blinking mode. Especially, the third blinking mode can be arranged to perform a blinking show according to the beat speed of the normal reproducing digital audio information. For example, the light emitting members 101 of the lighting assembly 10 are controlled by the system processor 3 to blink in turn serially toward a fixed direction to perform a ring-shaped blinking mode according to the beat speed of the normal reproducing digital audio information.
Referring to
First, the reader 22 is controlled by the system processor 3 to read the digital audio information recorded in the disc 1, and the memory controller 25 is controlled by the system processor 3 to send the digital audio information to the memory 26 (step S1). Before the first control signal is inputted to system processor 3, the digital audio signal reproducing device plays at the normal reproducing operation mode to keep the digital audio information being read out at a predetermined speed (step S2).
When the first control signal is not inputted to the system processor 3 under the situation of the first rotation disk 71 not being rotated (step S3, no), the digital audio signal reproducing device is played at the normal reproducing state, and the lighting assembly 10 is controlled by the system processor 3 to show a third blinking mode (step S4).
On the other way, when the first control signal is inputted to the system processor 3 under the situation of the first rotation disk 71 being rotated (step S3, yes), it further judges if the second control signal is inputted to the system processor 3 under the situation of the second rotation disk being pressed (step S5).
As the second control signal is not sent to the system processor 3 (step S5, no), the system processor 3 only receives the first control signal to keep the digital audio signal reproducing device to play at the pitchbend operation mode, and the lighting assembly 10 is controlled by the system processor 3 to show a second blinking mode (step S6). If the first rotation disk 71 is still rotated by user's hand to generate the first control signal, the show of the second blinking mode keeps on (step S7, no), while the first control signal stops due to the halt of the first rotation disk 71, the show of the second blinking mode of the lighting assembly 10 stops to end immediately (step S7, yes).
On the contrary, As the second control signal is sent to the system processor 3 (step S5, yes), the system processor 3 receives the first and second control signals simultaneously to keep the digital audio signal reproducing device to play at the scratch operation mode, and the lighting assembly 10 is controlled by the system processor 3 to show a first blinking mode (step S8). If the second rotation disk 72 is still rotated by user's hand to generate the second control signal, the show of the first blinking mode keeps on (step S9, no), while the second control signal stops due to the halt of the second rotation disk 72, the show of the first blinking mode of the lighting assembly 10 stops to end immediately (step S9, yes).
Accordingly, the system processor 3 can judge whether the first control signal and the second control signal are outputted to the system processor 3 by operation of the first rotation disk 71 and the second rotation disk 72 to determine the normal reproducing, scratch, and pitchbend operation modes of the digital audio information and can control the lighting assembly 10 to produce different blinking modes to correspond to the normal reproducing, scratch, and pitchbend operation modes of the digital audio information, so that the digital audio signal reproducing device can simulate the manipulation of the analogue record player, thereby facilitating the user's operating the digital audio signal reproducing device.
Although the invention has been explained in relation to its preferred embodiment(s) as mentioned above, it is to be understood that many other possible modifications and variations can be made without departing from the scope of the present invention. It is, therefore, contemplated that the appended claim or claims will cover such modifications and variations that fall within the true scope of the invention.
