CN2500055Y - Micro liquid crystal colour television - Google Patents
Micro liquid crystal colour television Download PDFInfo
- Publication number
- CN2500055Y CN2500055Y CN 00219665 CN00219665U CN2500055Y CN 2500055 Y CN2500055 Y CN 2500055Y CN 00219665 CN00219665 CN 00219665 CN 00219665 U CN00219665 U CN 00219665U CN 2500055 Y CN2500055 Y CN 2500055Y
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Abstract
A micro liquid crystal color television comprises a housing, a control circuit board and connected control keys, a liquid crystal screen, a speaker, an antenna, and a voltage-stabilizing power supply; the control circuit board comprises an electronic tuner, a medium pre-amplifying filter, a sing-chip television signal processing circuit, a liquid crystal driving circuit and an audio power amplifying circuit; a channel selection circuit is arranged between the electronic tuner and the sing-chip television signal processing circuit, and the channel selection circuit is the television-voltage synthesizing tuning circuit composed of a microprocessor, a memory and a drive circuit. The utility model can realize automatic search, channel storage and the control of voice volume, chromaticity, brightness and contrast, and the control of audio-video/television switch and timed shutdown.
Description
The utility model relates to a kind of color television set, particularly the liquid crystal micro color television set.
Miniature (2-4 inch) of the prior art lcd-tv such as brand name computers such as Casio, Toshiba.The control circuit board and connected operating key, liquid crystal display screen, loud speaker, antenna, stabilized voltage power supply and the power interface that comprise shell, liquid crystal micro colour TV, the control circuit board of lcd-tv mainly comprises electronic tuning unit, puts filter, one-chip television signal processing circuit, special-purpose circuit and the audio power amplifying circuit of promoting of liquid crystal display screen in pre-, between electronic tuning unit and one-chip television signal processing circuit station selecting circuit is housed, station selecting circuit is made of counter chip and level shifter.The shortcoming of its existence is: because the station selecting circuit in the liquid crystal micro colour TV control circuit board is not provided with microprocessor, so do not search for, deposit functions such as platform, control audio, video/television switching, initialize switch machine automatically.Its tuning manner is during the channel selection operation: utilize operating key to preset VHF, uhf band earlier with manual, and then manual crawl channel selection button, machine inside counting device chip makes tuning voltage progressively change from the 0-20 volt, makes machine be in search condition.When having TV signal to enter counter chip, promptly stopping search makes machine be in normal accepting state.Start shooting at every turn or change channel and all must repeat above step search signal again.Signal is analog signal in its machine, does not enter the digital signal stage.Television transmitting station's number increase at present is exceedingly fast, and some city can reach several ten channels.Cable TV at least also has tens channels.The tuning manner of miniature (2-4 inch) of the prior art lcd-tv can not satisfy people to product instructions for use fast and easily.
The purpose of this utility model is at the prior art deficiency, has proposed a kind of liquid crystal micro color TV that microprocessor is housed.
The purpose of this utility model is to be reached by following technical scheme, the utility model is a kind of liquid crystal micro color TV, comprise shell, the control circuit board of lcd-tv and connected operating key, liquid crystal display screen, loud speaker, antenna, the stabilized voltage power supply and the power interface of each operating circuit power supply in control circuit board, the control circuit board of liquid crystal micro color TV comprises the TV signal from antenna is converted to the electronic tuning unit that intermediate-freuqncy signal (IF) is sent, will from the medium-frequency TV signal (IF) of electronic tuning unit amplify and filtering after send pre-in put filter, to be converted to RGB (R from the medium-frequency TV signal demodulation separating treatment of putting filter in pre-, G, B) signal, vision signal (VIDEO), automatic frequency control signal (AFC), the one-chip television signal processing circuit of being furnished with BBD circuit and brightness-tone-volume-contrast control circuit of audio signal (AUDIO), RGB (the R that will send to from the one-chip television signal processing circuit, G, B) signal and vision signal (VIDEO) are handled and are enlarged into RGB (R, G, B) signal and composite synchronizing signal (SYNC) are delivered to the liquid crystal display screen promotion circuit of liquid crystal display screen, the automatic frequency control signal (AFC) that will enter from the one-chip television signal processing circuit and be processed into control signal and add to the station selecting circuit that has operating key of electronic tuning unit from the composite synchronizing signal (SYNC) that liquid crystal display screen promotes circuit, deliver to the audio power amplifying circuit of loud speaker after will amplifying from the audio signal (AUDIO) of one-chip television signal processing circuit, to transfer the promotion circuit before automatic gaining controling signal (AGC) adds to electronic tuning unit from the direct current signal of one-chip television signal processing circuit to, be characterized in that the station selecting circuit in the liquid crystal micro color TV control circuit board is a TV voltage synthesize tuning circuit, TV voltage synthesize tuning circuit comprises the automatic frequency control signal (AFC) from the one-chip television signal processing circuit, promote the composite synchronizing signal (SYNC) of circuit from liquid crystal display screen, line synchronizing signal (HD) from liquid crystal display screen, field sync signal (VD) is processed into control signal and adds to the microprocessor composition of being furnished with memory of electronic tuning unit through the promotion circuit.
TV signal enters electronic tuning unit from antenna, being converted to intermediate-freuqncy signal (IF) enters and puts filter in pre-and deliver to the one-chip television signal processing circuit again, through treatment conversion such as demodulation separation is RGB (R, G, B) signal, vision signal (VIDEO), automatic frequency control signal (AFC), audio signal (AUDIO), delivers to liquid crystal display screen more respectively and promotes circuit, microprocessor, audio power amplifying circuit.Simultaneously from liquid crystal display screen promote the composite synchronizing signal (SYNC) of circuit, line synchronizing signal (HD), the field sync signal (VD) sent by liquid crystal display screen deliver to microprocessor finish character, picture synchronously, the control signal of being sent by microprocessor adds to each relevant pin of electronic tuning unit by the promotion circuit in the TV voltage synthesize tuning circuit, finishes tuber function.By containing the TV voltage synthesize tuning circuit of microprocessor and combining of liquid crystal micro colour TV, realized the combination of digital circuit and analog circuit.Utilize the automatic search of TV voltage synthesize tuning circuit to deposit the platform function and be function and the screen display character function that digital signal is controlled and stored, make the extremely easy to use of machine the analog signal conversion of the adjusting usefulness of volume, contrast, brightness and colourity.Machine is in first start after platform is deposited in search automatically, during use as long as opening power accesses and will see channel, need change channel and also only need press corresponding button by remote control or this switch dish.Save the trouble of searching for channel selection one by one.Various analog quantitys once once deposit in for a long time automatically with channel data and enjoy.
Purpose of the present invention can also further reach by following scheme.Aforesaid liquid crystal micro color TV is characterized in that the liquid crystal micro color TV is equipped with the infrared remote receiver of being supported by the TV voltage synthesize tuning circuit in the control circuit board, and casing is provided with the infrared transmitter with its coupling outward.
The utility model compared with prior art, the control of a plurality of analog quantitys such as microprocessor is packed into can finish automatic search behind the liquid crystal micro colour TV, deposit platform and volume, colourity, brightness, contrast, reach varied and colorful screen display mode of operation, audio frequency, video/television switching controls, timing shutdown control.Install infrared transmitter and receiver additional, can finish remote control above function.Make operation very convenient.
Fig. 1 is the structural representation of facing of broken section of the present utility model.
Fig. 2 is the sectional structure schematic diagram of Fig. 1 center line section.
Fig. 3 is a circuit block diagram of the present utility model.
Fig. 4 is a circuit diagram of the present utility model.
Embodiment one.Contrast Fig. 1, Fig. 2, Fig. 3, Fig. 4, the following examples have further described summary of the invention of the present utility model.The liquid crystal micro color TV of present embodiment, comprise shell 18, the control circuit board 12 of lcd-tv and connected operating key 9,10,2,3, model is the TFT liquid crystal display screen 11 of LQ4RB17, loud speaker 7, antenna 13, the stabilized voltage power supply of each operating circuit power supply and the power interface 8 of charged source switch 1 in control circuit board 12, wherein, operating key comprises preset button 9, search button 10 and change platform button 2,3, the control circuit board 12 of liquid crystal micro color TV comprises the TV signal from antenna 13 is converted to the electronic tuning unit that intermediate-freuqncy signal (IF) is sent, will from the medium-frequency TV signal (IF) of electronic tuning unit amplify and filtering after send pre-in put filter, to be converted to RGB (R from the medium-frequency TV signal demodulation separating treatment of putting filter in pre-, G, B) signal, vision signal (VIDEO), automatic frequency control signal (AFC), the model of being furnished with BBD circuit and brightness-tone-volume-contrast analog control circuit of audio signal (AUDIO) is the one-chip television signal processing circuit of TDA8362, RGB (the R that will send to from the one-chip television signal processing circuit, G, B) signal and vision signal (VIDEO) are handled and are enlarged into RGB (R, G, B) signal and composite synchronizing signal (SYNC) are delivered to the liquid crystal display screen promotion circuit that the model of liquid crystal display screen is IR3P89, the automatic frequency control signal (AFC) that will enter from the one-chip television signal processing circuit and be processed into control signal and add to the station selecting circuit that has operating key of electronic tuning unit from the composite synchronizing signal (SYNC) that liquid crystal display screen promotes circuit, the model of delivering to loud speaker after will amplifying from the audio signal (AUDIO) of one-chip television signal processing circuit is the audio power amplifying circuit of JRC386, to transfer the promotion circuit before automatic gaining controling signal (AGC) adds to electronic tuning unit from the direct current signal of one-chip television signal processing circuit to, station selecting circuit in the liquid crystal micro color TV control circuit board is a TV voltage synthesize tuning circuit, and TV voltage synthesize tuning circuit comprises the automatic frequency control signal (AFC) from the one-chip television signal processing circuit, promote the composite synchronizing signal (SYNC) of circuit from liquid crystal display screen, line synchronizing signal (HD) from liquid crystal display screen, field sync signal (VD) is processed into control signal and is that the model of the E2PROM memory of TC89101 is that the microprocessor of TMP47C430N is formed through promoting the model of being furnished with that circuit adds to electronic tuning unit.The control of analog quantitys such as volume, colourity, brightness, contrast adopts potentiometer to regulate, and is respectively volume knob 4, colourity knob 5, brightness knob 16, contrast knob 17.Establish with cover 15 the battery compartment 14 that to adorn No. 5 batteries of 8 joints in the machine.Transparent panel protective layer 19 is housed in face of the liquid crystal display screen 11.A/V socket 6 is drawn from the one-chip television signal processing circuit.
TV signal enters electronic tuning unit from antenna, being converted to intermediate-freuqncy signal (IF) delivers to from 9 pin and puts filter in pre-and deliver to one-chip television signal processing circuit 45,46 pin that model is TDA8362 again, enter after demodulation separation etc. handles, by 18,19,20 pin RGB (R, G, B) signal being delivered to model is 1,2,3 pin that the liquid crystal display screen of IR3P89 promotes circuit, is that the liquid crystal display screen of IR3P89 promotes circuit 22,24,26 pin and delivers to 6,7,8 pin that model is the TFT liquid crystal display screen of LQ4RB17 by model again.The while model is that the 7 pin taking-up vision signals (VIDEO) of the one-chip television signal processing circuit of TDA8362 are delivered to 9 pin that model is the TFT liquid crystal display screen promotion circuit of IR3P89, after (model is that the liquid crystal display screen of IR3P89 promotes circuit) handles, composite synchronizing signal (SYNC) is delivered to 26 pin of microprocessor that model is TMP47C430N and TFT liquid crystal display screen 3 pin that model is LQ4RB17, finish between each circuit synchronously, for making circuit stable, model is that to deliver to model be that the audio power amplifying circuit of JRC386 is to promote speaker operation for the isolated audio signal of one-chip television signal processing circuit (AUDIO) of TDA8362 simultaneously.Liquid crystal display screen 2 pin are sent synchronous pin and are decided 29 pin that signal (SYNC HROLCK) to model is the liquid crystal display screen promotion circuit of IR3P89.
In the present embodiment, automatically search deposit the platform course of work when also being the channel selection operation its tuning manner be: after turning on the power switch 1, press in the operating key preset button 9, search button 10 after enter automatic search and deposit the platform program, under the control of microprocessor, the high potential of 5V appears in 3,4,5 pin of microprocessor successively, makes the corresponding pin of electronic tuning unit reach the high potential of 9V by promoting circuit.When high potential appearred in the every pin of 3,4,5 pin, the 1st pin was progressively changed by 5V-0 simultaneously, also by promoting 5 pin that circuit adds to the tuning voltage of 0-27V electronic tuning unit.In a single day TV signal appears in search procedure.Model is that 44 pin automatic frequencies control (AFC) signal of the one-chip television signal processing circuit of TDA8362 begins step-down, by 6th pin of level shifter to microprocessor, microprocessor slows down sweep speed, and the intermediate frequency that makes electronic tuning is progressively near the optimum of 38 megahertz intermediate frequencies.Add to 45,46 pin that model is the one-chip television signal processing circuit of TDA8362 by putting filter in pre-.Deposit signal in E that model is TC89101 at signal the best of it microprocessor by 11,12 pin
2In the prom memory.And then repeat above step and can deposit 55 radio station at most in.Deposit the place, radio station in up to L, H, three frequency band searches of U being finished afterwards, return automatically first.When needing channel selection, use is changed platform button 2,3 and can be realized forward and reverse platform that changes.
Character in search procedure shows.Search beginning back screen occur STOP and corresponding VL, VH, VU and corresponding channel amount 1,2 ... 55.The yellow line of growth one by one appears simultaneously with search.This is by the character signal of microprocessor the 15th, 16 pin output, it is that the liquid crystal display screen of IR3P89 promotes circuit that 22,23,24 pin that add to model and be the one-chip television signal processing circuit of TDA8362 are delivered to model then, and delivering to model again is 6,7,8 pin of the TFT liquid crystal display screen of LQ4RB17.For making character and TV signal synchronous, promptly the position of Xian Shiing is fit to.Add to 17,18 pin that model is the microprocessor of TMP47C430N from 1,14 pin taking-up HD, the VD signal of liquid crystal display screen.
The mode that the present embodiment machine adopts potentiometer to regulate to the control of analog quantitys such as volume, colourity, brightness, contrast.Thereby making direct voltage add to model is the purpose that 17,25,26 and 27 pin of the one-chip television signal processing circuit of TDA8362 reach control brightness, tone, volume and contrast.After once automatically search is deposited platform and is finished, from now on as long as opening power is found out the program that will see, the direct current of available 12V of while.Can adorn No. 5 batteries of 8 joints in the machine.
Embodiment two.The following examples continue to describe summary of the invention of the present utility model, in the above-described embodiments, the liquid crystal micro color TV is equipped with the infrared remote receiver of being supported by the TV voltage synthesize tuning circuit in the control circuit board, and casing is provided with the infrared transmitter with its coupling outward.Can substitute this machine operating key by remote controller.
Claims (2)
1, a kind of liquid crystal micro color TV, comprise shell (18), control circuit board of lcd-tv (12) and connected operating key (9,10,2,3), liquid crystal display screen (11), loud speaker (7), antenna (13), the stabilized voltage power supply and the power interface (8) of each operating circuit power supply in control circuit board (12), the control circuit board of liquid crystal micro color TV (12) comprises the TV signal from antenna (13) is converted to the electronic tuning unit that intermediate-freuqncy signal (IF) is sent, will from the medium-frequency TV signal (IF) of electronic tuning unit amplify and filtering after send pre-in put filter, to be converted to RGB (R from the medium-frequency TV signal demodulation separating treatment of putting filter in pre-, G, B) signal, vision signal (VIDEO), automatic frequency control signal (AFC), the one-chip television signal processing circuit of being furnished with BBD circuit and brightness-tone-volume-contrast control circuit of audio signal (AUDIO), RGB (the R that will send to from the one-chip television signal processing circuit, G, B) signal and vision signal (VIDEO) are handled and are enlarged into RGB (R, G, B) signal and composite synchronizing signal (SYNC) are delivered to the liquid crystal display screen promotion circuit of liquid crystal display screen, the automatic frequency control signal (AFC) that will enter from the one-chip television signal processing circuit and be processed into control signal and add to the station selecting circuit that has operating key of electronic tuning unit from the composite synchronizing signal (SYNC) that liquid crystal display screen promotes circuit, deliver to the audio power amplifying circuit of loud speaker after will amplifying from the audio signal (AUDIO) of one-chip television signal processing circuit, to transfer the promotion circuit before automatic gaining controling signal (AGC) adds to electronic tuning unit from the direct current signal of one-chip television signal processing circuit to, it is characterized in that the station selecting circuit in the liquid crystal micro color TV control circuit board is a TV voltage synthesize tuning circuit, TV voltage synthesize tuning circuit comprises the automatic frequency control signal (AFC) from the one-chip television signal processing circuit, promote the composite synchronizing signal (SYNC) of circuit from liquid crystal display screen, line synchronizing signal (HD) from liquid crystal display screen, field sync signal (VD) is processed into control signal and adds to the microprocessor composition of being furnished with memory of electronic tuning unit through the promotion circuit.
2, liquid crystal micro color TV according to claim 1 is characterized in that the liquid crystal micro color TV is equipped with the infrared remote receiver of being supported by the TV voltage synthesize tuning circuit in the control circuit board, and casing is provided with the infrared transmitter with its coupling outward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00219665 CN2500055Y (en) | 2000-03-15 | 2000-03-15 | Micro liquid crystal colour television |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00219665 CN2500055Y (en) | 2000-03-15 | 2000-03-15 | Micro liquid crystal colour television |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2500055Y true CN2500055Y (en) | 2002-07-10 |
Family
ID=33584830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00219665 Expired - Fee Related CN2500055Y (en) | 2000-03-15 | 2000-03-15 | Micro liquid crystal colour television |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2500055Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101873505A (en) * | 2010-05-17 | 2010-10-27 | 深圳市同洲电子股份有限公司 | Method and system for synchronously transmitting audio/video signal |
| CN101680614B (en) * | 2007-06-04 | 2011-08-03 | 夏普株式会社 | Backlight unit, display unit and television receiver |
| CN105450968A (en) * | 2014-08-29 | 2016-03-30 | 深圳Tcl新技术有限公司 | Modular television and television signal processing method thereof |
-
2000
- 2000-03-15 CN CN 00219665 patent/CN2500055Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101680614B (en) * | 2007-06-04 | 2011-08-03 | 夏普株式会社 | Backlight unit, display unit and television receiver |
| US8432504B2 (en) | 2007-06-04 | 2013-04-30 | Sharp Kabushiki Kaisha | Backlight unit, display unit and television receiver |
| CN101873505A (en) * | 2010-05-17 | 2010-10-27 | 深圳市同洲电子股份有限公司 | Method and system for synchronously transmitting audio/video signal |
| CN105450968A (en) * | 2014-08-29 | 2016-03-30 | 深圳Tcl新技术有限公司 | Modular television and television signal processing method thereof |
| CN105450968B (en) * | 2014-08-29 | 2019-06-21 | 深圳Tcl新技术有限公司 | Module TV and its TV signal processing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |