CN104506859A - Television core test circuit and system - Google Patents
Television core test circuit and system Download PDFInfo
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- CN104506859A CN104506859A CN201410851998.6A CN201410851998A CN104506859A CN 104506859 A CN104506859 A CN 104506859A CN 201410851998 A CN201410851998 A CN 201410851998A CN 104506859 A CN104506859 A CN 104506859A
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Abstract
The invention discloses a television core test circuit. The television core test circuit comprises a control module, a voltage acqusition circuit and an audio acqusition module, wherein the control module is used for outputting a standard audio signal and a standard video signal to a television core and acquiring an LVDS (Low Voltage Differential Signaling) signal output by the television core; the voltage acqusition circuit is used for acquiring a voltage value of a preset position of a television motherboard and outputting the voltage value to the control module; the audio acqusition module is used for acquiring an audio play signal output by the television core and outputting the audio play signal to the control module; the control module is used for comparing the LVDS signal with the standard video signal, comparing the audio play signal with the standard audio signal and comparing the voltage value with the preset standard voltage; thus the test of the television core is realized. The invention also discloses a television core test system. The test difficulty of the television core is reduced.
Description
Technical field
The present invention relates to TV technology, particularly relate to Core of TV set test circuit and system.
Background technology
At present, when carrying out Core of TV set test, the multiple signal generator of usual employing is linked in TV SKD and then adopts existing detecting instrument to carry out data acquisition, coordinates industrial computer to carry out data processing, to complete the test to television set chip according to the data gathered.Because each equipment all needs to debug, thus cause the difficulty of test higher.
Foregoing, only for auxiliary understanding technical scheme of the present invention, does not represent and admits that foregoing is prior art.
Summary of the invention
Main purpose of the present invention is to provide a kind of Core of TV set test circuit and system, is intended to the difficulty of test reducing Core of TV set.
For achieving the above object, a kind of Core of TV set test circuit provided by the invention comprises:
Control module, for outputting standard audio signal and video standard signal extremely described Core of TV set, and gathers the LVDS signal of described Core of TV set output;
Voltage collection circuit, for gathering the magnitude of voltage of preset position in described TV SKD, and exports described magnitude of voltage to described control module;
Audio collection circuit, for gathering the audio playback signal that described Core of TV set exports, and exports described audio playback signal to described control module;
Described control module is by described LVDS signal and described video standard signal comparison, compare described audio playback signal and described standard audio signal, described magnitude of voltage and preset standard voltage are compared; To realize the test of Core of TV set.
Preferably, the pulse-width signal of the pulse-width signal of collection with corresponding standard also for gathering the pulse-width signal in described TV SKD, and is compared by described control module, judges that whether the pulse-width signal gathered is abnormal.
Preferably, described video standard signal comprises AV signal, VGA signal and HDMI signal;
Described control module carries out information source switching specifically for controlling described Core of TV set, to realize the test of AV input channel, VGA input channel and HDMI input channel to described Core of TV set.
Preferably, described Core of TV set switches an information source every preset time period, and described information source is the signal of described AV input channel, VGA input channel and HDMI input channel correspondence input.
Preferably, described audio collection circuit is for gathering AUDIO output signal, SPEAKER signal, headphone output signal and supper bass signal.
Preferably, described LVDS signal and described video standard signal comparison are specially the difference of the image of LVDS signal and the image of described video standard signal described in described control module comparison by described control module.
Preferably, described control module is also for output key analog signal and infrared remote-controlled signal extremely described Core of TV set.
Preferably, described Core of TV set test circuit also comprises AV and outputs signal Acquisition Circuit, described AV outputs signal Acquisition Circuit and is converted to digital signal for the AV output signal exported by described Core of TV set, and export digital signal to described control module, carry out image restoring for control module according to described digital signal.
Preferably, described Core of TV set test circuit also comprises USB transmission circuit, described control module exports described LVDS signal, described video standard signal, described audio playback signal, described standard audio signal, described magnitude of voltage and preset standard voltage to display terminal by described USB transmission circuit, shows for display terminal.
In addition, in order to realize foregoing invention object, the present invention also provides a kind of TV set die testing system, the thimble comprising the manipulator for extracting Core of TV set, Core of TV set test circuit and be electrically connected with described Core of TV set test circuit, after described Core of TV set is extracted preset position by described manipulator, described Core of TV set test circuit is electrically connected with described Core of TV set by thimble; Described Core of TV set test circuit comprises:
Control module, for outputting standard audio signal and video standard signal extremely described Core of TV set, and gathers the LVDS signal of described Core of TV set output;
Voltage collection circuit, for gathering the magnitude of voltage of preset position in described TV SKD, and exports described magnitude of voltage to described control module;
Audio collection circuit, for gathering the audio playback signal that described Core of TV set exports, and exports described audio playback signal to described control module;
Described control module is by described LVDS signal and described video standard signal comparison, compare described audio playback signal and described standard audio signal, described magnitude of voltage and preset standard voltage are compared; To realize the test of Core of TV set.
The embodiment of the present invention by arranging control module outputting standard audio signal and video standard signal extremely described Core of TV set, and gathers the LVDS signal of described Core of TV set output; The magnitude of voltage that voltage collection circuit gathers preset position in described TV SKD is set, and exports described magnitude of voltage to described control module; The audio playback signal that audio collection circuit gathers the output of described Core of TV set is set, and exports described audio playback signal to described control module; Described control module is by described LVDS signal and described video standard signal comparison, compare described audio playback signal and described standard audio signal, described magnitude of voltage and preset standard voltage are compared; To realize the test of Core of TV set.Due to the output of signal, collection and comparison are located in a circuit, when operating, only need write corresponding test program in control module, and interface corresponding with TV SKD for Core of TV set test circuit is connected, thus the automatic test of Core of TV set can be realized, reduce the difficulty of test of Core of TV set.
Accompanying drawing explanation
Fig. 1 is the electrical block diagram of TV set die testing system one embodiment of the present invention.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The invention provides a kind of Core of TV set test circuit, with reference to Fig. 1, in one embodiment, this Core of TV set test circuit comprises:
Control module 10, for outputting standard audio signal and video standard signal extremely described Core of TV set 20, and gathers LVDS (the Low Voltage Differential Signaling low-voltage differential) signal of described Core of TV set 20 output;
Voltage collection circuit 30, for gathering the magnitude of voltage of preset position in described TV SKD, and exports described magnitude of voltage to described control module 10;
Audio collection circuit 40, for gathering the audio playback signal that described Core of TV set 20 exports, and exports described audio playback signal to described control module 10;
Described control module 10 is by described LVDS signal and described video standard signal comparison, compare described audio playback signal and described standard audio signal, described magnitude of voltage and preset standard voltage are compared; To realize the test of Core of TV set 20.
In the present embodiment, when above-mentioned Core of TV set test circuit is mainly used in production TV SKD, Core of TV set 20 is tested.Particularly, above-mentioned control module 10 comprises FPGA (Field Programmable Gate Array, field programmable gate array) controller.The output of above-mentioned standard audio signal is specially, DDS (Direct Digital Synthesizer is realized by FPGA controller, digital frequency synthesize), with sine wave output, and by DAC change-over circuit, the above-mentioned standard audio signal of rear generation is changed to the sine wave exported.It should be noted that above-mentioned DAC can adopt two rank weighted resistor simulations.
Above-mentioned video standard signal comprises: AV signal, VGA signal and HDMI signal.Above-mentioned control module 10 also comprises AV signal generation sub-circuit, VGA signal generation sub-circuit and HDMI signal generation sub-circuit; Wherein be provided with a coding chip (such as SAA7121) in AV signal generation sub-circuit to encode to digital YUV, and convert to analog compound television signal CVBS with simulation is separated TV signal S-video signal output.Basic encoding function comprises subcarrier generator, color modulation and synchronizing signal interpolation, and brightness and colourity carry out filtering process according to " RS-170-A " and " CCIR624 " standard.The built-in colour bar generator of SAA7121, the embodiment of the present invention produces color bar signal (i.e. AV signal) by control SAA7121.Above-mentioned VGA signal generation sub-circuit is provided with level transferring chip (such as 74F244), level conversion is carried out, to obtain the color bar signal (i.e. above-mentioned VGA signal) corresponding to eight kinds of combinations of redness, green, blue three kinds of colors for FPGA controller directly being produced VGA sequential.Be provided with HDMI coding chip (such as SIL9134HDMI) in above-mentioned HDMI signal generation sub-circuit, export HDMI signal to Core of TV set 20 by above-mentioned FPGA controller control HDMI coding chip.It should be noted that TV SKD is provided with AV interface, USB interface and HDMI, in Core of TV set 20, be provided with AV transmission channel, VGA transmission channel and HDMI transmission channel.When adopting AV signal as information source, transferring to Core of TV set 20 by AV interface and AV transmission channel, carrying out data processing for television set; When adopting VGA signal as information source, transferring to Core of TV set 20 by USB interface and VGA transmission channel, carrying out data processing for television set; When adopting HDMI signal as information source, transferring to Core of TV set 20 by HDMI and HDMI transmission channel, carrying out data processing for television set.
It should be noted that above-mentioned control module 10 carries out information source switching specifically for controlling described Core of TV set 20, to realize the test of AV input channel, VGA input channel and HDMI input channel to described Core of TV set 20.Preferably, described Core of TV set switches an information source every preset time period, and described information source is the signal of described AV input channel, VGA input channel and HDMI input channel correspondence input.In the present embodiment, control signal Core of TV set 20 can be exported by above-mentioned FPGA controller, carry out information source switching to control Core of TV set 20.Particularly, control AV input channel, VGA input channel and HDMI input channel can carry out lane testing as information source channel successively, and after switching, after each input channel can continue input preset time, then be switched to next input channel.
Such as, when testing VGA input channel, first VGA signal generation sub-circuit generation VGA signal and above-mentioned standard audio signal are inputed to Core of TV set 20 by USB interface and VGA passage; Then this VGA signal, standard audio signal, LVDS signal and audio output signal is obtained by FPGA controller; Then carry out image ratio pair according to VGA signal and LVDS signal, standard audio signal and audio output signal are carried out sound waveform comparison, thus whether acquisition VGA input channel exists exception.
In above-mentioned TV SKD, the magnitude of voltage of preset position specifically can comprise: supply power voltage, core voltage, DDR voltage, USB voltage, tuner voltage and screen voltage etc.AD conversion can be adopted in the present embodiment to obtain concrete magnitude of voltage size, it should be noted that and first need within voltage transitions to AD acquisition range, then gathered by AD.By detecting TV SKD Shang Ge road voltage, thus can judge that whether each road voltage is normal.
In the present embodiment, above-mentioned audio collection circuit 40 is for gathering AUDIO output signal, SPEAKER signal, headphone output signal and supper bass signal.Above-mentioned audio collection circuit 40 can adopt PGA112 chip, different audio signals is existed to the difference of amplitude, by the gain of software control PGA112 chip.For AUDIO output signal, these two signal amplitudes of headphone output signal are lower, need to be heightened by the gain of software design patterns by PGA112 chip, and higher for SPEAKER signal, supper bass signal amplitude, need to be turned down by the gain of software design patterns by PGA112 chip.It should be noted that audio collection circuit 40 is Differential Input, differential signal is directly connected, for single-ended signal, only need by input negativing ending grounding.
The embodiment of the present invention by arranging control module 10 outputting standard audio signal and video standard signal extremely described Core of TV set 20, and gathers the LVDS signal of described Core of TV set 20 output; The magnitude of voltage that voltage collection circuit 30 gathers preset position in described TV SKD is set, and exports described magnitude of voltage to described control module 10; The audio playback signal that audio collection circuit 40 gathers the output of described Core of TV set 20 is set, and exports described audio playback signal to described control module 10; Described control module 10 is by described LVDS signal and described video standard signal comparison, compare described audio playback signal and described standard audio signal, described magnitude of voltage and preset standard voltage are compared; To realize the test of Core of TV set 20.Due to the output of signal, collection and comparison are located in a circuit, when operating, only need write corresponding test program in control module 10, and interface corresponding with TV SKD for Core of TV set test circuit is connected, thus the automatic test of Core of TV set 20 can be realized, reduce the difficulty of test of Core of TV set 20.
Further, based on above-described embodiment, in the present embodiment, above-mentioned control module 10 is also for gathering the pulse-width signal in described TV SKD, and the pulse-width signal of the pulse-width signal of collection with corresponding standard is compared, judge that whether the pulse-width signal gathered is abnormal.
In the present embodiment, directly the output of pulse-width signal in TV SKD above-mentioned FPGA controller be can be connected to, the amplitude of this pulse-width signal, frequency and duty ratio be detected by FPGA controller.Whether abnormal according to the size determination pulse-width signal of this amplitude, frequency and duty ratio.
Particularly, described LVDS signal and described video standard signal comparison are specially the difference of the image of LVDS signal and the image of described video standard signal described in described control module comparison by above-mentioned control module 10.
In the present embodiment, above-mentioned FPGA controller is built-in with image algorithm, the similarity of the image of described LVDS signal and the image of described video standard signal is calculated according to this image algorithm, when this similarity reaches preset value, then represent that the input channel of current test is normal, the size of this preset value can be arranged according to actual needs.
By adopting above-mentioned FPGA controller, directly output key analog signal and infrared remote-controlled signal to described Core of TV set 20, thus press key function testing can be realized.
Further, based on above-described embodiment, in the present embodiment, above-mentioned Core of TV set test circuit also comprises AV and outputs signal Acquisition Circuit 50, described AV outputs signal Acquisition Circuit 50 and is converted to digital signal for the AV output signal exported by described Core of TV set 20, and digital signal is exported to described control module 10, carry out image restoring for control module 10 according to described digital signal.
In the present embodiment, above-mentioned AV outputs signal Acquisition Circuit 50 and SAA7113 can be adopted to realize, and particularly, SAA7113 is a 9 digital videos input preprocessed chips, this chip employing CMOS technology, and being connected with PC or DSP by I2C bus forms application system.Chip internal comprises two-way simulation process passage, can realize the selection of CVBS, S-Video video signal source, anti-aliasing filter, A/D conversion, automatic clamping, automatic growth control (AGC), (CGC) occurs clock, multi-modulation scheme is decoded, brightness/contrast/saturation controls (BCS).The present invention adopts SAA7113 chip to gather AV output signal, converts analog signal to digital signal, then is reduced into image by FPGA controller process.
Further, based on above-described embodiment, in the present embodiment, above-mentioned Core of TV set test circuit also comprises USB transmission circuit 60, described control module 10 exports described LVDS signal, described video standard signal, described audio playback signal, described standard audio signal, described magnitude of voltage and preset standard voltage to display terminal 70 by described USB transmission circuit 60, shows for display terminal 70.
In the present embodiment, above-mentioned display terminal 70 can be held by PC, PC end is provided with upper computer software, above-mentioned LVDS signal and image corresponding to video standard signal is shown by this upper computer software, display audio playback signal and waveform corresponding to standard audio signal, display magnitude of voltage and preset standard voltage size; The form of display interface can be arranged according to actual needs particularly, does not limit further at this.
Be understandable that, the Core of TV set test circuit that the embodiment of the present invention provides can realize the measurement of the many aspects to Core of TV set 20, and user, by upgrading the program of above-mentioned FPGA controller, can realize the test of various different demand, particularly, content measurement is as shown in the table:
The present invention also provides one to look machine core test macro, this thimble comprising manipulator for extracting Core of TV set 20, Core of TV set test circuit depending on machine core test macro and be electrically connected with described Core of TV set test circuit, after described Core of TV set 20 is extracted preset position by described manipulator, described Core of TV set test circuit is electrically connected with described Core of TV set 20 by thimble.The structure of this Core of TV set test circuit can refer to above-described embodiment, does not repeat them here.Naturally, due to the technical scheme that have employed above-mentioned Core of TV set test circuit depending on machine core test macro of the present embodiment, therefore this has all beneficial effects of above-mentioned Core of TV set test circuit depending on machine core test macro.
These are only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. a Core of TV set test circuit, is characterized in that, described Core of TV set test circuit comprises:
Control module, for outputting standard audio signal and video standard signal extremely described Core of TV set, and gathers the LVDS signal of described Core of TV set output;
Voltage collection circuit, for gathering the magnitude of voltage of preset position in described TV SKD, and exports described magnitude of voltage to described control module;
Audio collection circuit, for gathering the audio playback signal that described Core of TV set exports, and exports described audio playback signal to described control module;
Described control module is by described LVDS signal and described video standard signal comparison, compare described audio playback signal and described standard audio signal, described magnitude of voltage and preset standard voltage are compared; To realize the test of Core of TV set.
2. Core of TV set test circuit as claimed in claim 1, it is characterized in that, described control module is also for gathering the pulse-width signal in described TV SKD, and the pulse-width signal of the pulse-width signal of collection with corresponding standard is compared, judge that whether the pulse-width signal gathered is abnormal.
3. Core of TV set test circuit as claimed in claim 1, it is characterized in that, described video standard signal comprises AV signal, VGA signal and HDMI signal;
Described control module carries out information source switching specifically for controlling described Core of TV set, to realize the test of AV input channel, VGA input channel and HDMI input channel to described Core of TV set.
4. Core of TV set test circuit as claimed in claim 3, it is characterized in that, described Core of TV set switches an information source every preset time period, and described information source is the signal of described AV input channel, VGA input channel and HDMI input channel correspondence input.
5. Core of TV set test circuit as claimed in claim 1, it is characterized in that, described audio collection circuit is for gathering AUDIO output signal, SPEAKER signal, headphone output signal and supper bass signal.
6. Core of TV set test circuit as claimed in claim 1, it is characterized in that, described LVDS signal and described video standard signal comparison are specially the difference of the image of LVDS signal and the image of described video standard signal described in described control module comparison by described control module.
7. Core of TV set test circuit as claimed in claim 1, is characterized in that, described control module is also for output key analog signal and infrared remote-controlled signal extremely described Core of TV set.
8. Core of TV set test circuit as claimed in claim 1, it is characterized in that, described Core of TV set test circuit also comprises AV and outputs signal Acquisition Circuit, described AV outputs signal Acquisition Circuit and is converted to digital signal for the AV output signal exported by described Core of TV set, and export digital signal to described control module, carry out image restoring for control module according to described digital signal.
9. the Core of TV set test circuit according to any one of claim 1 to 8, it is characterized in that, described Core of TV set test circuit also comprises USB transmission circuit, described control module exports described LVDS signal, described video standard signal, described audio playback signal, described standard audio signal, described magnitude of voltage and preset standard voltage to display terminal by described USB transmission circuit, shows for display terminal.
10. a TV set die testing system, it is characterized in that, the thimble comprising the manipulator for extracting Core of TV set, as claimed in any one of claims 1-9 wherein Core of TV set test circuit and be electrically connected with described Core of TV set test circuit, after described Core of TV set is extracted preset position by described manipulator, described Core of TV set test circuit is electrically connected with described Core of TV set by thimble.
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| CN201410851998.6A CN104506859A (en) | 2014-12-31 | 2014-12-31 | Television core test circuit and system |
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| CN201410851998.6A CN104506859A (en) | 2014-12-31 | 2014-12-31 | Television core test circuit and system |
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| CN106341629A (en) * | 2016-08-16 | 2017-01-18 | 厦门纳网科技股份有限公司 | Liquid crystal television mainboard ADC automatic correction system and method |
| CN107678728A (en) * | 2017-09-19 | 2018-02-09 | 联想(北京)有限公司 | Audio data processing method and electronic equipment |
| CN109905699A (en) * | 2019-03-11 | 2019-06-18 | 贸联电子(昆山)有限公司 | Intelligent shadow frequency detection method and system |
| CN110336998A (en) * | 2019-07-04 | 2019-10-15 | 深圳市康冠技术有限公司 | Show mainboard detection method, display mainboard detection device and readable storage medium storing program for executing |
| CN111565312A (en) * | 2020-04-30 | 2020-08-21 | 联宝(合肥)电子科技有限公司 | Data processing method, detection device and computer readable storage medium |
| CN113727091A (en) * | 2021-07-12 | 2021-11-30 | 深圳市有为信息技术发展有限公司 | Video input channel testing method and system for video terminal |
| CN115825704A (en) * | 2023-02-14 | 2023-03-21 | 深圳新智联软件有限公司 | Method, device, system, equipment and medium for testing projection mainboard |
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Application publication date: 20150408 |