CN2078480U - Portable liquid crystal displayed karaoke player - Google Patents

Abstract

The utility model relates to a portable karaoke player with a liquid crystal display. A volume governor tap hole and a potentiometer of adjustable reverberation are additionally arranged on the box of a general box type player. A liquid crystal display is arranged on one side of the general box type player to form an entirety when the general box type player is turned on or turned off. A switch for controlling the liquid crystal display and a liquid crystal displaying contrast volume are arranged on one side of the liquid crystal display. So the portable karaoke player with a liquid crystal display which has tone quality beautifying function and can simultaneously display the lyric of the magnetic tape and the contents of rhythm prompt characters when a magnetic tape is played is formed.

Description

Portable liquid crystal displayed karaoke player

The utility model relates to the device of applied magnetic method storage information reproduction in the physical department.

The present Caraok device that occurs adopts reverberator directly to be connected, to utilize the Karaoke audiotape to sing mode with stereo set, lacks the synchronous lyrics Presentation Function, the difficult grasp performance of singer rhythm; Adopt reverberator and video tape recorder (laser machine), televisor, sound equipment connected mode, equipment is many, investment is big, carry inconvenience, travel or the situation of short of electricity under, perfect karaoke is with regard to very difficult realization.

The purpose of this utility model is the Karaoke cassette player of making a kind of small portable, showing the tape lyrics and rhythm prompt content when having tone color beautifying functions, tape playback on the liquid crystal display synchronously.

One-piece construction of the present utility model as shown in Figure 1.

Square frame principle of the present utility model as shown in Figure 2.

The utility model is on the box of common cassette player 1, set up acoustic pickup consent 2, reverberation adjustable potentiometer 3, side at cassette player 1, be equipped with in the time of to open or close and cassette player 1 forms the LCDs 14 of one, one side of LCDs 14 is equipped with control liquid crystal display power switch 5 and liquid crystal display contrast adjustment potentiometer 6.

Binary channels magnetic recording playback system of the present utility model, one as the accompaniment music passage, and one as the code displaying passage.

The sound signal that the singer sends through acoustic pickup consent 2, after audio sound reverberator 8 polishings are amplified, is mixed with the output of the tape audio accompaniment music signal playback circuit 7 of cassette player 1, through amplifier 9, exports at loudspeaker 10 or earplug 4.

Reverberation circuit electricity principle as shown in Figure 3.The BBD bucket type circuit that beautifies tone color is by IC ₂IC ₃(all adopting MN3207) formed, and respectively there is the one-level voltage amplification its front and back, its IC ₁Reach IC4 and can select TL084 low noise integrated circuit for use, volume control potentiometer 3 is R ₂₂, reverberation parameters is regulated by R ₁₄R ₉Control.

The tape code displaying passage of cassette player 1, through playback circuit 7, output to treatment circuit 11 and carry out full sized pules signal shaping, again through compiling executive circuit 12, with the full sized pules conversion of signals is video data and control command signal, signal shows on LCDs 14 by liquid crystal display drive circuit 13.

The treatment circuit 11 electric principles of code displaying path as shown in Figure 4.

Treatment circuit 11 is made up of signal limiter reshaper 15, frequency detector 16, impact damper 17.

The code displaying passage of tape adopts the Kansascity standard recording technique, and it is compiled into displaying contents the pulse information with following characteristics: the cycle that eight frequencies are 2400HZ is represented logical one; The cycle that four frequencies are 1200HZ is represented logical zero; Record the constituting of character: the start bit of a logical zero, 7 or 8 data bit, two or more off-position; The order of seven ASCII character data bit is: lowest order formerly, most significant digit after; In complete 1 lead segment that has before the data block more than 30 seconds, 5 seconds complete 1 concluding paragraph is arranged afterwards; The transfer rate of data is 300 bauds.

Peak～the peak value of the code displaying signal pulse of playback circuit 7 should be about 2 volts at treatment circuit 11 interfaces, this pulse signal is through amplitude limit, shaping 15, make frequency detector 16 that a undistorted square wave input be arranged, frequency detector 16 is differentiated the signal of 1200 hertz and 2400 hertz and is " 0 " and " 1 " to export compiling preferred circuit 12 to through impact damper 17.

The integrated circuit block U1 of signal shaping 15 adopts four comparer LM339, and U2 adopts the two monostalbe trigger MC14538MCP of CMOS in the frequency detector 16, and U3 adopts the two D-latch MC14013BCP of CMOS, and U4 adopts 8 digit buffer 74LS244 in the impact damper 17.

Compiling preferred circuit 12, driving circuit 13, display screen 14 electric principles are as shown in Figure 5.

Compiling preferred circuit 12 comprises microprocessor U5, watchdog routine memory U6, address decoder U7.Microprocessor U5 is assembled into the ASCII character character with the full sized pules signal after handling under the programmed control of memory U6, convert binary number again to, thereby realize the asynchronous input of signal, finishes the compiling to input signal.

Microprocessor U5 address wire: A ₀～A ₁₂(30～40,1～2) is connected to watchdog routine memory U6, finishes the watchdog routine addressing.A ₁₃～A ₁₅(3～5), are also finished the program of control microprocessor and are carried out and control writing of display random access memory except that the sheet of finishing memory under program, LCD controller selects the function through address decoder U7 decoding.Microprocessor control line WR(22), RD(21) be connected to the WR(43 of LCD controller U8), RD(42) end makes the WR(25 of display random access memory (U10)) reading and writing data of remaining valid on the end designation data bus.

The data line DB of microprocessor U5 ₀～DB ₇(7～10,12～14) are connected to LCD controller U8 data input pin DB ₀～DB ₇(45～52) are connected to character generator ROM U16(3～10 through data buffer U18 again) and the I/O end (17～24) of display random access memory U10～U13, the data transmission finished.As the needs of character display, ROMU16 takes place and also is added in the system its addressing A in character ₀～A ₇(3～10) are distributed by the microprocessor data line, A ₈～A ₁₁(23～25) are by the RA of display controller U8 ₀～RA ₃Finish (61～64).The addressing of display random access memory U10～U13 is by the MA of display controller U8 ₀～MA ₁₂(1～6,74～80) are distributed.The sheet of display random access memory (U10～U13), ROM(U16 takes place character) selects the MA of function by display controller U8 ₁₂～MA ₁₅Finish through code translator U15 (71～74).

Data by microprocessor compiling is finished during as graphic display data, write display random access memory U10～U13, then by the data input port 53～64 of controller U8 addressing writing controller ROM/RAM; During as steering order, then the order register of writing controller U8 by the controller inner working, is finished each Presentation Function; During as the character video data, then with the ROM addressing mouth RA of controller U8 ₀～RA ₃(61～64) finish the addressing to ROM, with addressing content writing controller ROM/RAM input port 53～64.

Data are finished the transmission of coded signal by microprocessor U5.

Little processing U5 of compiling preferred circuit 12 adopts Z～80 CPU watchdog routine memory U6 to adopt 12764, and address decoder U7 adopts code translator LS138.

Driving circuit 13 is by LCD controller U8, line driver U19, and row driver U20, U21, U22, U23 forms.

LCD Controller box U8 receives the steering order of microprocessor U5, and data message is sent control signal and video data to driver by the requirement of specifying mode and Presentation Function, produces drive signal, drives the liquid crystal display displaying contents.

Controller U8 produces modulation signal, i.e. video data latch signal LIP(24 to the selection of mode, function to line driver U19 according to input instruction) and driving alternating signal FRMB(27).The video data latch signal is connected to 32 bit shift register shift clock CP(41 of line driver), the alternating signal that drives usefulness is connected to the LCD driving alternating signal DF(42 of line driver).The data-signal that controller U8 produces, be frame signal FRP(23) be connected to line driver data input pin DI(44), when showing beginning, line driver U19 reads in a frame signal, to display line first row access of advancing, after all row drive signals responses, the row driver Refresh Data, latch simultaneously, 32 bit shift register in the line driver are moved one, to display line second row access of advancing; After all 32 row of visit, DI re-enters, and line driver U9 repeats above-mentioned scanning process, and the accumulation of first frame image shows, when second frame image data input row driver, begins second frame image and shows.

In to line driver U19 control, controller is to row driver U20～U23 input video data and modulation signal, i.e. video data shift clock CLP(26), video data latch signal LIP(24), drive and use alternating signal FRMB(27), video data output signal U D ₀(33), the video data shift clock is connected to the shift register shift clock CP(50 of row driver), the video data latch signal is connected to the latch shift register signal LOAD(52 of row driver), driving is connected to the LCD driving alternating signal DF(53 of row driver with alternating signal), video data output UD ₀(33) be connected to row driver input end DI ₁(51).

By the video data of controller U8 output shift clock CP(50 at row driver) under the control, in the serial-in shift register, when the register input finishes, controller U8 sends latch signal, send in the latch holding within the shift register, transfer the row drive signal to by column drive circuit U20～U23, with the responsive trip drive signal.

The LCD controller U8 of driving circuit 13 adopts MSM6255G9, line driver U19 adopts MSM5238GS, and row driver U20～U23 adopts MSM5839GS, shows that memory adopts MSM516GRS, code translator adopts LS138, and character ROM takes place adopts 12764 data buffers to adopt LS245.

When showing lyrics content, on LCDs 14, show institute's singing speech earlier, the control, the data message that are compiled according to microprocessor by display controller U8 make the instructs cursor on the LCD 14 move below showing the lyrics with singing rhythm, reach indication rhythm prompt purpose.

The pocket cassette player that people are familiar with increases the device of handling, compile, drive, show a passage Chinese words of common tape (or figure) coded signal, just can understand corresponding lyrics content and rhythm prompt when another musical passage broadcasts in the tape.The user will sing joyfully in a loud voice, and then can beautify circuit by audio frequency input jack and tone color, connects or external loudspeaker (earplug) is heard the sound of polishing interior.Skilled and need not sing sound and amplify output the time, the music that the user also can close liquid crystal indicator, do not need microphone to follow tape to play is silent sings or sings, in the occasion of walking, short of electricity or in taking an excursion in an open country, select a kind of mode lightheartedly to carry out karaoke.

In the binary channels of tape, one a conduct shows foreign language pronunciation literal code passage as the foreign language sound channel, and the user then can learn foreign languages better by the utility model, memorizing words.

Claims (1)

1, a kind of portable liquid crystal shows the Karaoke cassette player, is made up of tape, magnetic tape drive control gear, sound discharge road, it is characterized in that:

A. set up acoustic pickup consent 2, reverberation adjustable potentiometer 3 on the box of cassette player 1, be equipped with to open or close the time and cassette player forms the LCDs 14 of one in a side of cassette player 1, one side of LCDs 14 is equipped with control liquid crystal display switch 5 and liquid crystal display contrast adjustment potentiometer 6.

B. the sound signal sent of singer through acoustic pickup consent 2, after audio sound reverberator 8 polishings are amplified, is mixed with the output of the tape audio accompaniment music signal playback circuit 7 of cassette player 1, through amplifier 9, exports at loudspeaker 10 or earplug 4.

C. the tape code displaying passage of cassette player 1, through playback circuit 7, output to treatment circuit 11 and carry out full sized pules signal shaping, again through compiling executive circuit 12, with the full sized pules conversion of signals is video data and control command signal, signal shows on LCDs 14 by liquid crystal display drive circuit 13.

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