CN113760121B - Intelligent multi-interface controlled liquid crystal screen splicing system - Google Patents
Intelligent multi-interface controlled liquid crystal screen splicing system Download PDFInfo
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- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
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Abstract
The invention provides an intelligent multi-interface controlled liquid crystal screen splicing system which comprises an induction device, a connecting device, a modulation device, an identification device and a processor, wherein the identification device is used for transmitting the display content of each liquid crystal screen; the induction device is used for collecting the display content of the liquid crystal screen; the connecting device is used for being connected with the data lines of the liquid crystal screens; the modulation device is used for regulating and controlling each path of digital video signal data acquired by the connecting device. According to the invention, the induction device and the recognition device are matched with each other, so that the displayed picture of the liquid crystal display can be changed, and the displayed content can be refreshed through the real-time refreshing setting; meanwhile, the connecting device and the modulating device are matched with each other, so that each path of signal can be accurately regulated and controlled by content display and area display on the display screen formed by splicing the liquid crystal screens.
Description
Technical Field
The invention relates to the technical field of liquid crystal screens, in particular to an intelligent multi-interface controlled liquid crystal screen splicing system.
Background
At present, a large screen is applied to an intelligent traffic system, and two methods of 'screen capturing' and 'directly installing and operating a high-resolution image (such as an electronic map, a network management map and the like) on a processor' are mostly adopted. Or a plurality of video signals are accessed through a decoder and a video matrix and displayed on a spliced wall. The "screen grab" approach does not take full advantage of the large screen resolution, which is limited by the resolution of the PC. The rest methods are that the large screens of various manufacturers need to be butted, and the interface or special software provided by the manufacturers is used for realizing operation control.
For example, CN104253931B prior art discloses a method for recording screen images of a multi-screen tiled display system, in the existing multi-screen tiled display system, a recording and playing system is directed at a single path of display signals, and only can record one or more paths of image signals displayed on an upper large screen, but cannot record any selected image content on the large screen, especially when some of the arbitrarily selected image content is only a part of the one path of display signals. The prior art generally needs to separate the signal to be displayed and the recorded signal through a signal distributor, and has high cost, low efficiency and time consumption. According to the existing technologies such as KR102685364B1, EP248292961 and US08723266B1 found through a large number of searches, a large screen is composed of a plurality of screens, each screen needs to be equipped with a decoder box independently, the cost is high, and data lines need to be connected, on one hand, the cost is wasted due to the fact that a plurality of decoders are configured, on the other hand, the data lines are connected, the lines can be very disordered after the lines are arranged, and the data lines are not convenient to hide.
The invention is made in order to solve the problems that the interface is too many, the position can not be adjusted, the cross confusion exists between the data lines, the layout can not be adjusted and the like in the field.
Disclosure of Invention
The invention aims to provide an intelligent multi-interface controlled liquid crystal screen splicing system aiming at the defects of the existing liquid crystal screen splicing.
In order to overcome the defects of the prior art, the invention adopts the following technical scheme:
an intelligent multi-interface controlled liquid crystal screen splicing system comprises an induction device, a connecting device, a modulation device, an identification device and a processor, wherein the identification device is used for transmitting the display content of each liquid crystal screen; the induction device is used for collecting the display content of the liquid crystal screen; the connecting device is used for being connected with the data lines of the liquid crystal screens; the modulation device is used for regulating and controlling each path of digital video signal data acquired by the induction device; the connecting device comprises a plurality of connecting interfaces and a connecting module, wherein the connecting interfaces are arranged on the connecting module and are used for connecting external signal data lines; the connecting module is used for collecting the paths of the signal data lines and transmitting the signals to the modulation device; the connection module comprises a receiver, an analog-to-digital converter, a feedforward equalizer and a feedback equalizer, wherein the receiver is used for receiving analog signals and sampling the received analog signals through a plurality of sampling circuits; the feedforward equalizer is used for receiving and processing the analog signal to provide a plurality of feedforward equalizer interleaved sampled signal values and applying the sampled signal values to a plurality of sampling circuits; the feedback equalizer processing a plurality of analog signals to obtain a plurality of feedback equalizer interleaved sampled signal values and adding, by an adder, respective outputs of each of the feed forward equalizer interleaved sampled signal values to provide an output signal value of the feedback equalizer;
the analog-to-digital converter digitizes the plurality of feedback equalizer output signal values to provide digital data bits corresponding to each of the plurality of feedback equalizer output signal values for transmission to the display channels of the respective display screen.
Optionally, the modulation device comprises a detector, a programmable sample rate filter, a digital sampler, and a memory controller, the detector receiving a rate of change of an input digital video signal; the programmable sample rate filter also receives the input digital video signal; wherein the control signal of the detector controls the programmable sample rate filter in accordance with the rate of change of the digital video signal; the digital sampler receives an input digital video signal through the programmable sample rate filter, wherein the programmable sample rate filter adjusts a time base of the digital video signal to adjust the digital sampler to sample more data from the connection; simultaneously, the control signal from the detector further controls the programmable sample rate filter according to a vertical rate of change of the digital video signal for two frames of image data in a video component; the storage controller stores the digital video signals processed by the detector, the programmable sampling rate filter and the digital sampler and transmits the digital video signals to each display channel of the display screen; the storage controller controls the digital video signals in the row storage unit or the column storage unit corresponding to the display channel to be triggered so as to realize display in the display channel.
Optionally, the sensing mechanism is configured to collect digital video signal output of each liquid crystal display; the sensing mechanism comprises a sensing module and a timer, and the sensing module is respectively arranged on the back of each liquid crystal screen and collects the display content of each liquid crystal screen; the timer is used for timing the refresh time of the digital video signal transmission by the identification device in one period.
Optionally, the detector comprises a relative rate of change detector and an absolute rate of change detector, the relative detector vertically comparing corresponding portions of the previous line or lines of image data; the absolute rate of change detector also receives an input digital video signal; wherein the absolute change rate detector vertically compares a current horizontal line of image data in two frame video components with a corresponding portion of a previous line or lines of image data supplied to the absolute change rate detector from a line storage unit of the liquid crystal panel.
Optionally, the line storage unit includes a line memory address, and the line memory address is used to mark a display channel corresponding to the display screen; the memory controller addresses a display channel corresponding to a memory address of a line, and transmits the digital video signal to the display channel when the addressing is correct. Optionally, the column storage unit includes a column memory address, and the column memory address is used to mark a display channel corresponding to the display screen; and the storage controller is used for addressing the display channel corresponding to the column memory address, and transmitting the digital video signal to the display channel after the addressing is correct.
Optionally, the data buffer is configured to buffer each of the digital video signal data and update in real time based on a transition of each sampling circuit, and the sampling circuit includes a sample-and-hold circuit and a track-and-hold circuit connected in series with the sample-and-hold circuit, and each track-and-hold circuit is configured to receive and hold a sampled signal value in the sample-and-hold circuit during a first refresh time and to transmit the sampled signal value to the sample-and-hold circuit at a subsequent refresh time.
Optionally, the modulation device further includes a limiting module, where the limiting module is configured to adjust a display range in a display area of the display screen to control any display size of the display range, and the limiting module includes a touch screen, a selection unit, an analysis unit, and an identification unit, where the touch screen is configured to identify an operation of a user, and perform control input of the display range on the display screen according to the selection unit arranged on the touch screen; the analysis unit is used for analyzing the input of the selection unit, controlling the address of the line memory or the row memory based on the input of the selection unit, and determining the address of the mapped line memory or row memory in the display area through the mapping of the touch screen and the display area of the display screen; the identification unit reads the address of the line memory or the row memory, determines the area range and the coordinate position of the display interface through the identification submodule, and forms a new screen display area.
Optionally, the selection unit includes induction zone, a plurality of position detection spare and identification probe, the frame evagination of touch-sensitive screen forms the boss that identification probe placed, identification probe is used for right the operator gesture is discerned, just identification probe orientation induction zone, simultaneously, is in the operator gesture stir direction or stir the position and detect in the induction zone.
Optionally, in the process that the user operates the selection unit, the displacement of the hand of the user is collected through the sensing area, and the movement amount of the fingertip is as follows:
wherein S ismoveThe lateral movement amount of the fingertip on the sensing area is shown; t ismoveThe longitudinal offset of the fingertip on the sensing area is shown; (x)0，y0) Is a transverse initial position; (x)i，yi) Is a transverse end position; (u)0，v0) Is composed ofA longitudinal initial position; (u)i，vi) A longitudinal end position; the transverse initial position, the longitudinal initial position, the transverse end position and the longitudinal end position are detected according to the position detection pieces arranged in the sensing area.
The beneficial effects obtained by the invention are as follows:
1. the display content of each display screen is refreshed or transmitted by adopting the matching of the identification device and the induction device, so that the display content of the whole liquid crystal screen can be adjusted according to a set input signal;
2. the induction device and the recognition device are matched with each other, so that the displayed picture of the liquid crystal display can be changed, and the displayed content can be refreshed through the real-time refreshing setting;
3. through the mutual matching of the connecting device and the modulating device, each path of signal can be accurately regulated and controlled on a display screen formed by splicing each liquid crystal screen;
4. filtering the digital video signal by using a programmable sample rate filter so that interference or noise on the digital video signal can be filtered;
5. the video signal is compressed or accelerated by adopting speed modulation, so that the video signal can be displayed on a display screen, and a displayed image can be changed as soon as possible during displaying so as to obtain the optimal display effect;
6. the touch screen realizes that the set display area can be accurately limited by shifting the selection unit arranged on the edge of the touch screen by the hand of a user, and the selection unit is arranged in the length direction and the width direction of the touch screen and controls the display areas in the two directions.
Drawings
The invention will be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the embodiments. Like reference numerals designate corresponding parts throughout the different views.
FIG. 1 is a schematic control flow diagram of the present invention.
Fig. 2 is a schematic structural diagram of the display screen and the limiting module.
Fig. 3 is an enlarged schematic view of a portion a in fig. 2.
Fig. 4 is a schematic structural diagram of the display screen and the connecting device.
Fig. 5 is a schematic structural diagram of the limiting module.
Fig. 6 is a schematic control flow diagram of the restricted area.
The reference numbers illustrate: 1-a display screen; 2-a liquid crystal screen; 3-a display area; 4-the user; 5-bulge; 6-identifying the probe; 7-a sensing area; 8-a restricted area; 9-unrestricted region; 10-a touch screen; 11-a connection interface; 12-a restriction module.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to embodiments thereof; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Other systems, methods, and/or features of the present embodiments will become apparent to those skilled in the art upon review of the following detailed description. It is intended that all such additional systems, methods, features and advantages be included within this description, be within the scope of the invention, and be protected by the accompanying claims. Additional features of the disclosed embodiments are described in, and will be apparent from, the detailed description that follows.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms described above will be understood by those of ordinary skill in the art according to the specific circumstances.
The first embodiment is as follows: the present embodiment provides, in conjunction with FIGS. 1-6
An intelligent multi-interface controlled liquid crystal screen splicing system comprises an induction device, a connecting device, a modulation device, an identification device and a processor, wherein the identification device is used for transmitting the display content of each liquid crystal screen; the induction device is used for collecting the display content of the liquid crystal screen; the connecting device is used for connecting with the data lines of the liquid crystal screens; the modulation device is used for regulating and controlling each path of digital video signal data acquired by the induction device;
the connecting device comprises a plurality of connecting interfaces and a connecting module, wherein the connecting interfaces are arranged on the connecting module and are used for connecting external signal data lines; the connecting module is used for collecting the paths of the signal data lines and transmitting the signals to the modulation device;
the connection module comprises a receiver, an analog-to-digital converter, a feedforward equalizer and a feedback equalizer, wherein the receiver is used for receiving analog signals and sampling the received analog signals through a plurality of sampling circuits; the feedforward equalizer is used for receiving and processing the analog signal to provide a plurality of feedforward equalizer interleaved sampled signal values and applying the sampled signal values to a plurality of sampling circuits; the feedback equalizer processing a plurality of analog signals to obtain a plurality of feedback equalizer interleaved sampled signal values and adding, by an adder, respective outputs of each of the feed forward equalizer interleaved sampled signal values to provide an output signal value of the feedback equalizer;
the analog-to-digital converter digitizes the plurality of feedback equalizer output signal values to provide digital data bits corresponding to each of the plurality of feedback equalizer output signal values for transmission to the display channels of the respective display screen. The processor is respectively in control connection with the sensing device, the connecting device and the identification device, and is used for carrying out centralized control on all the devices based on the processor, so that a display system formed by combining all the liquid crystal screens can be adjusted according to actual needs, and the best experience can be obtained. The connecting device and the modulating device are matched with each other, so that the liquid crystal screen can be connected with an external input signal through the connecting device, and meanwhile, the display content of each display screen is refreshed or transmitted through the matching of the identifying device and the sensing device, so that the display content of the whole liquid crystal screen can be adjusted according to the set signal input; in this embodiment, the identification device includes an identification board and a transmission module, and the transmission module is disposed on the identification board; the transmission module is connected with the connecting device and used for providing refreshing signals to the sensing device, so that each liquid crystal display screen can perform refreshing operation. According to the display principle of the liquid crystal screen, the induction device is matched with the identification device, so that the displayed picture of the liquid crystal screen can be changed, and the displayed content can be refreshed through the real-time refreshing setting. The signal receiver of each liquid crystal screen is arranged on one side of the liquid crystal screen, which faces the identification device, and is arranged opposite to the identification plate, so that the signal receiver of each liquid crystal screen can refresh the display signal of the liquid crystal screen under the action of the identification plate.
Optionally, the sensing device includes a sensing mechanism, and the sensing mechanism is configured to collect digital video signal output of each liquid crystal display; the sensing mechanism comprises a sensing module and a timer, and the sensing module is respectively arranged on the back surface or the back plate of each liquid crystal screen and is used for collecting the display content of each liquid crystal screen; the timer is used for timing the refresh time in one period. The sensing mechanism collects data of all liquid crystal screens to be displayed, so that the data input by the connecting device can be displayed on the liquid crystal screens through the sensing mechanism, and meanwhile, the sensing module is used for sensing the transmitted data of the identification device, so that the data collected by the sensing module can be collected and displayed by all the liquid crystal screens. The induction module is matched with the timer, wherein the timer is used for timing data transmitted to the induction module by the identification device within a set time interval and triggering an updating or refreshing instruction after timing is finished. And meanwhile, the data of the identification device is collected by a sensing module. The acquisition module comprises an acquisition circuit and a display channel, wherein the acquisition circuit is used for acquiring display data of the data transmitted by the connecting device and the identification device and displaying the display data on a screen of a display screen formed by splicing the liquid crystal screens through the display channel. In addition, the circuit for acquiring the display signal is well known to those skilled in the art, and those skilled in the art can query the relevant technical manual to obtain the technology, so that details are not repeated in this example. The display channel is used for connecting the liquid crystal display and a data transmission channel formed by electrically connecting the acquisition circuit, and is a conventional setting mode.
Optionally, the connection device includes a plurality of connection interfaces and a connection module, where the plurality of connection interfaces are disposed on the connection module and connect to external signal data lines; the connecting module is used for collecting the paths of the signal data lines and transmitting the signals to the modulation device; the connecting module is used for connecting external signal lines or data lines and transmitting digital video signals of all paths. The connecting device is arranged on the periphery of the display screen formed by assembling the liquid crystal screens, and external signal lines or data lines are connected with the plurality of connecting interfaces. Each of the connection interfaces is connected with the connection module circuit, transmits data corresponding to each interface to the modulation device, and limits display content or a display area under the adjustment or modulation operation of the modulation device. Through connecting device with the modulating device is mutually supported for each way signal can be in each the accurate regulation and control of display content and display area is carried out on the display screen that the LCD screen concatenation formed. The connection module processes the signal in the early stage, so that the signal that the display screen can receive is unified into an analog signal or a digital signal, and the purpose of displaying is achieved by modulating each path of signal through the modulation device. In addition, each the display screen that the LCD screen concatenation formed still is connected with display module, display module is used for each the address of LCD screen is managed, makes the data of modulating device can be accurate pass through display module manages, realizes best display effect. And meanwhile, the display module is also managed with the bit address of each liquid crystal display data transmission.
The connection module further comprises a receiver, an analog-to-digital converter, a feedforward equalizer and a feedback equalizer, wherein the receiver is used for receiving analog signals, sampling the received analog signals through a plurality of sampling circuits, and detecting data of a plurality of interfaces, so that a plurality of paths of signals are converted through the analog-to-digital converter. The receiver, the analog-to-digital converter, the feedforward equalizer and the feedback equalizer are all arranged in the sampling circuit and process data transmitted in the sampling circuit. Other parts of the sampling circuit are well known to those skilled in the art, and those skilled in the art can query the relevant technical manual to know the technology, so that the details are not repeated in this example.
The feedforward equalizer is configured to receive and process an analog signal to provide a plurality of feedforward equalizer interleaved sampled signal values and to apply the sampled signal values to a plurality of sampling circuits. The feedback equalizer processing the plurality of analog signals to obtain a plurality of feedforward equalizer interleaved sampled signal values and adding respective outputs of each feedforward equalizer interleaved sampled signal value by an adder to provide an output signal value of the feedback equalizer; the analog-to-digital converter digitizes the plurality of feedback equalizer output signal values to provide digital data bits corresponding to each of the plurality of feedback equalizer output signal values for transmission to the display channels of the respective display screen.
The feedforward equalizer, the feedback equalizer, the adder and the analog-to-digital converter are respectively and electrically connected to form a path for data acquisition of each connection interface, and are connected to the display screen and displayed on the display screen. In addition, the feedforward equalizer, the feedback equalizer, the adder and the analog-to-digital converter may transmit data through a plurality of circuits, which are not described in detail herein.
Optionally, the modulation device comprises a detector, a programmable sample rate filter, a digital sampler, and a memory controller, the detector receiving a rate of change of an input digital video signal; the programmable sample rate filter also receives the input digital video signal; wherein the control signal of the detector controls the programmable sample rate filter in accordance with the rate of change of the digital video signal; the digital sampler receives an input digital video signal through the programmable sample rate filter, wherein the programmable sample rate filter adjusts a time base of the digital video signal to adjust the digital sampler to sample more data from the connection; simultaneously, the control signal from the detector further controls the programmable sample rate filter according to a vertical rate of change of the digital video signal for two frames of image data in a video component; the storage controller stores the digital video signals processed by the detector, the programmable sampling rate filter and the digital sampler and transmits the digital video signals to each display channel of the display screen; the storage controller controls the digital video signals in the row storage unit or the column storage unit corresponding to the display channel to be triggered so as to realize display in the display channel. Optionally, the sensing mechanism is configured to collect digital video signal output of each liquid crystal display; the sensing mechanism comprises a sensing module and a timer, and the sensing module is respectively arranged on the back of each liquid crystal screen and collects the display content of each liquid crystal screen; the timer is used for timing the refresh time of the digital video signal transmission by the identification device in one period. The sensing mechanism is used for collecting the digital video signal output of each liquid crystal screen; the sensing mechanism comprises a sensing module and a timer, and the sensing module is respectively arranged on the back of each liquid crystal screen and collects the display content of each liquid crystal screen; the timer is used for timing the refresh time of the digital video signal transmission by the identification device in one period. The modulation device and the connection device are mutually matched, so that the content on the display screen can be adjusted. In this embodiment, a data video signal is received from the connection module, and the amount of change of the digital signal per unit time is detected, that is: an absolute rate of change to the digital video signal. Meanwhile, the digital video signal is filtered through a programmable sampling rate filter, so that interference or noise on the digital video signal can be filtered. The digital sampler receives an input digital video signal through the programmable sample rate filter, wherein the programmable sample rate filter adjusts a time base of the digital video signal to adjust the digital sampler to sample more data from the connection device.
A digital sampler that receives an input digital video signal through a programmable sample rate filter samples more data from the digital video signal before and after a sudden change in the video signal detected by the first or second change rate detectors. A change detector and less data from the digital video signal during a sudden change, the sudden change being identified as exceeding a predetermined threshold. More data is sampled from the digital video signal before and after the video signal abrupt change, and less data is sampled from the digital video signal during the abrupt change, the abrupt change being identified as exceeding a predetermined threshold. Preferably, the increase in sampling before and after the mutation is balanced with the decrease in sampling during the mutation. The rate of change of the input digital video signal is detected by the processor through control instructions or executable program (either serially or between successive horizontal data lines; more data is sampled from the digital video signal before and after a video signal jump, less data is sampled from the digital video signal during the jump, the jump being identified as exceeding a predetermined threshold.
Upon detection of such edges, the digital signal is sampled at a variable rate so that more sampling is performed immediately before and after the sudden change in signal, and less sampling is performed during the change so that the edges in the video image displayed on the display screen occupy fewer pixels to obtain a sharper image effect. When the input data to the display screen is an analog video signal, the modulation by the speed of the analog H-scan enhances the appearance of the edges of objects in the resulting video image (where the edges have at least some vertical component). In other words, where the analog video signal represents an object edge, the signal has substantial variations representing visual transitions as the object edge. Compressing or accelerating the video signal through speed modulation enables the video signal to be displayed on the display screen, so that the displayed image can be changed as soon as possible during displaying, and the optimal display effect can be obtained. When the signal changes representing the edges of the object are displayed quickly, the visual transition as an edge also occurs quickly, providing sharp edges and an improved image.
The detector comprises a relative rate of change detector and an absolute rate of change detector, the relative detector vertically comparing corresponding portions of the previous line or lines of image data; the absolute rate of change detector also receives an input digital video signal; wherein the absolute change rate detector vertically compares a current horizontal line of image data in two frame video components with a corresponding portion of a previous line or lines of image data supplied to the absolute change rate detector from a line storage unit of the liquid crystal panel.
First, digital video signals are received from respective interfaces of a digital video connection apparatus. The digital video signal source may be any digital video signal source including, but not limited to, the following: cable or satellite television systems, DVD players, video CD players, CD ROM drives, etc.
The modulation device further comprises a signal delay for delaying the digital video signal and cooperating with the programmable sample rate filter and processing the digital signal.
The digital video signal is fed to a delay and an absolute rate of change detector. An absolute rate of change detector monitors for abrupt changes in the video signal that indicate a transition in the edges or other vision of objects in the video images carried by the digital video signal. When the change rate detector identifies an edge of an object in an image carried by the video signal, the detector outputs a control signal to the programmable sample rate filter and adjusts the time base of the signal through the filter. The signal is sampled to generate pixel information, i.e. the sampling of the digital video signal is increased before and after the edges of the object, i.e. abrupt changes of the signal, and fewer sampling edges occur during the object. The result is that the edge occupies fewer pixels in the generated image. Thus, the edges appear clearer, more definite, i.e. with higher resolution, than would otherwise be the case. In effect, the rise time of the digital signal portion of the encoded object edge or other visual transition is minimized.
The signal delay delays the input of the digital signal to the programmable sample rate filter to allow the change rate detector to sense object edges or other visual transitions encoded in the signal and control the programmable sample rate filter accordingly by the processor receiving the signal of the signal delay. Thus, a delay receives an input digital video signal and outputs a delayed digital video signal to a programmable sample rate filter.
The programmable sample rate filter adjusts the time base of the video signal so that more signal samples are added before and after object edges or other visual transitions, and the number of samples is reduced during the transition. The programmable sample rate filter may operate as a controllable signal delay such that the portion of the video signal immediately preceding and following an object edge or other visual transition is output at a slower than normal rate, while the portion outputs the video signal encoding the transition at a faster than normal rate. The time base adjusted video signal may be triggered by the programmable sample rate filter output to the digital sampler.
The sampler preferably samples the signal at a constant rate and outputs a sampled signal derived from the input signal. Because the sampler samples the input signal at a constant rate, where the input signal has been slowed down by the programmable sample rate filter for more samples, and will be taken from the slowed down sample portion of the input signal. Conversely, where the input signal has been accelerated by the programmable sample rate filter (i.e., during abrupt transitions indicating visual transitions) fewer samples will be taken (i.e., fewer pixels in the resulting video image) from those accelerated signal portions. The programmable sample rate filter adjusts the time base of the signal, effectively feeding the signal to the digital sampler faster or slower than normal to control the sampling of the signal by the sampler.
Thus, the signal portion immediately before the abrupt change and the signal portion immediately after the abrupt change are output to the digital sampler. Effectively extending the time during which the signal portion is fed to the sampler. In contrast, the signal portion containing the abrupt change is output to the digital sampler at an accelerated rate, effectively reducing the time taken to feed the signal portion to the sampler.
At the signal portions that encode the edges or visual transitions of objects within the video image carried by the signal, the rate of change of the signal increases or decreases abruptly. By detecting the absolute rate of change, a sudden increase or decrease in the rate of change will be detected. When the increase or decrease exceeds a predetermined threshold, it will indicate the presence of an object edge in the image or other visually performing transition operation.
The line storage unit comprises a line memory address, and the line memory address is used for marking a display channel corresponding to the display screen; and the memory controller addresses the display channel corresponding to the memory address of the line, and transmits the digital video signal to the display channel after the addressing is correct. Optionally, the column storage unit includes a column memory address, and the line memory address is used to mark a display channel corresponding to the display screen; and the storage controller is used for addressing the display channel corresponding to the column memory address, and transmitting the digital video signal to the display channel after the addressing is correct.
Optionally, the data buffer is configured to buffer each of the digital video signal data and update in real time based on a transition of each sampling circuit, and the sampling circuit includes a sample-and-hold circuit and a track-and-hold circuit connected in series with the sample-and-hold circuit, and each track-and-hold circuit is configured to receive and hold a sampled signal value in the sample-and-hold circuit during a first refresh time and to transmit the sampled signal value to the sample-and-hold circuit at a subsequent refresh time.
Optionally, the storage of the digital video signal by the row storage unit or the column storage unit is realized by the row storage unit or the column storage unit controlled by the storage controller; the detector comprises a relative rate of change detector and an absolute rate of change detector, the relative detector vertically comparing corresponding portions of previous one or more lines of image data in a plurality of images present in the video stream; the absolute rate of change detector also receives an input digital video signal; wherein the absolute change rate detector vertically compares a current horizontal line of a plurality of lines of image data present in a video stream with a corresponding portion of a previous line or lines of image data supplied from the line storage unit to the absolute change rate detector; at the same time, the control signal from the absolute rate of change detector further controls the programmable sample rate filter according to the vertical rate of change of the digital video signal between horizontal lines of image data. If no such jump in rate of change is detected, pixel data is sampled from the video signal at regular intervals to decode the video image. When an object edge or visual transition is detected, such as a rapid jump in the rate of change of the signal, more pixel data is sampled from the signal before and after the sudden jump, and less pixel data is sampled during the sudden jump, and then an output signal based on the adjusted sample is generated. The signal is fed to a delay and an absolute rate of change detector which is predicted to detect high rates of change indicative of vertical object edges or other visual transitions, or transitions with a large number of vertical components, in the video images of the video signal. The change rate detector will output a control signal to a programmable sample rate filter that controls the output of the video signal to the digital sampler in the manner described. The definition and sharpness of vertical object edges or visual transitions in the resulting video image will be enhanced by the above-described operation steps. Receiving the incoming video signal, the memory controller can determine when each line of the video image begins and ends within the video signal.
The memory controller will control the row memory cells or the column memory cells to capture each successive row or series of rows of image data from the input signal, which is also fed back into the row memory address or the column memory address. When a line of video images enters the video signal, it is fed to a first rate of change detector and a second rate of change detector. At the same time, a control signal from the memory controller causes the line storage unit to output a previously received one or more lines of the video image stored in the line storage unit to the second rate of change detector. Thus, the second rate of change detector may vertically compare matching segments of consecutive horizontal lines of the video image and determine the vertical rate of change. This vertical rate of change will jump when horizontal object edges or other horizontal visual transitions appear in the video image, and the second rate of change detector outputs a signal to the programmable sample rate filter using the same operating principle as the first rate of change detector.
Thus, the programmable sample rate filter may further adjust the output of the video signal to the digital sampler such that the digital sampler samples from portions of the signal more ahead of vertical or horizontal object edges in the vertical and horizontal directions, starting from portions of the signal containing vertical or horizontal edges. Such that the resulting signal provides a video image with enhanced sharpness and effective resolution with enhanced resolution at object edges and linear transitions and point highlights.
The general steps are as follows: firstly, receiving an input digital video signal; next, the absolute rate of change of the signal is monitored. At the signal portions that encode object edges or visual transitions within the video image carried by the signal, a sudden increase or decrease in the rate of change of the signal will occur. Thus, by monitoring the absolute rate of change, a sudden increase or decrease in the rate of change will be detected. When the increase or decrease exceeds a predetermined threshold, a vertical object edge or other visual transition in the image is indicated. When such vertical object edges or visual transitions are detected, such as a rapid jump in the rate of change of the signal, more pixel data is sampled from the signal before and after the sudden jump, and less pixel data is sampled during the sudden jump, and the process then compares the current signal value for a horizontal line of the video image with the corresponding portion of the previous line or lines. For detecting a vertical rate of change exceeding a predetermined threshold, the rate of change indicating the presence of horizontal object edges or visual transitions in a video image carried by the signal. Where such a vertical comparison of signal values indicates the presence of a horizontal object edge, more pixels are sampled vertically before and after the portion of the signal encoding the horizontal object edge, while fewer pixel edges or other visual transitions are sampled from the portion of the signal encoding the horizontal object. Pixel data is periodically sampled from the video signal when no vertical or horizontal edges in the video image are detected. An output signal based on the adjusted samples is then generated. The output signal will provide enhanced appearance and effective resolution for vertical and horizontal object edges and visual transitions within the image when displayed for optimal display.
Optionally, the modulation apparatus further comprises a data buffer, the data buffer is configured to buffer each digital video signal data and update in real time based on a conversion of each sampling circuit, the sampling circuit comprises a sample-and-hold circuit and a track-and-hold circuit connected in series with the sample-and-hold circuit, each track-and-hold circuit is configured to receive and hold a sampled signal value in the sample-and-hold circuit during a first refresh time and to transmit the sampled signal value to the sample-and-hold circuit at a subsequent refresh time. The data buffer is used for receiving a refreshing instruction of the digital video signal data, and effectively improving the display effect of display contents on the display screen for the conversion of the updated digital video signal data in the sampling circuit in the refreshing process. The sample-and-hold circuit is electrically connected with the track-and-hold circuit, and is used for storing the digital video signal data displayed in the display screen and displaying the digital video signal data in the display screen, and meanwhile, when a variable component exists in the digital video signal, namely: and if the dynamic change of the video exists, the display screen is ensured to display various digital video signals by executing the refreshing operation.
The second embodiment: with reference to fig. 1 to 6, the modulation apparatus further includes a limiting module, where the limiting module is configured to adjust a display range in the display area, so as to control any display size of the display range, and effectively ensure that the display area in the display screen can be limited according to actual needs. The limiting module comprises a touch screen, a selecting unit, an analyzing unit and an identifying unit, wherein the touch screen is used for identifying the operation of a user and controlling and inputting the display range on the display screen according to the selecting unit arranged on the touch screen; the analysis unit is used for analyzing the input of the selection unit, controlling the address of the line memory or the row memory based on the input of the selection unit, and determining the address of the mapped line memory or row memory in the display area through the mapping of the touch screen and the display area of the display screen; the identification unit reads the address of the line memory or the row memory, determines the area range and the coordinate position of the display interface through the identification submodule, and forms a new screen display area.
The limiting module further comprises a microcontroller, the microcontroller is respectively in control connection with the touch screen, the selecting unit, the analyzing unit and the identifying unit, and data collection is carried out on operation of a user.
The selection unit is arranged in the touch screen and is used for selecting a display area by an operator; the display screen is connected with the detector, the programmable sampling rate filter, the digital sampler, the storage controller and a display module of the display screen through connecting wires, and data transmission and display area determination are carried out based on the data of the selection unit. The microcontroller is respectively in control connection with the touch screen, the selection unit, the analysis unit and the identification unit and collects the toggle operation of the user under the control of the microcontroller on the touch screen, the selection unit, the analysis unit and the identification unit.
The touch screen realizes that the set display area can be accurately limited by the fact that the user stirs the selection unit arranged on the edge of the touch screen by hands. The selection unit is arranged in the length direction and the width direction of the touch screen and controls the display areas in the two directions.
The touch screen comprises a touch screen body, a selection unit and a control unit, wherein the selection unit comprises an induction area, a plurality of position detection pieces and an identification probe, a frame of the touch screen protrudes outwards to form a boss for placing the identification probe, the identification probe is used for identifying the gesture of an operator, faces the induction area, and detects the poking direction or the poking position of the gesture of the operator in the induction area; meanwhile, the sensing area senses the position relation between each position detection piece and the finger of the operator, and the moving distance or the moving distance between the finger of the user and the sensing area can be detected.
The position detection pieces are distributed at equal intervals along the length direction of the sensing area and are used for detecting the contact position of the fingertip of the user and the sensing area. In addition, the position detecting member includes, but is not limited to, the following listed ones: the device comprises a capacitance sensing module, a pressure sensor, a resistance sensing module, an infrared sensor and the like. In addition, the position detection piece is used for detecting the position of the contact of the sensing area, and positioning the position to determine the position coordinate.
The identification probe faces the sensing area and accumulates the contact position and the moving direction of the finger of the user and the sensing area in real time. And detecting the difference between the moving distance and the inherent distance of the hand of the user through the piezoelectric signal arranged in the sensing area during the sliding process of the user in the sensing area. And setting the position corresponding to the difference value as a non-display area. And if the user input is not received in the selection unit, setting the display to be full-area display. In addition, the analysis unit is configured to scale the areas of the touch screen and the display screen proportionally, that is: the non-display area of the selection unit corresponds to the non-display area on the display screen one by one, so that the operator can accurately control the display area of the display screen when the selection unit selects the area.
In the process that the user operates the selection unit, the displacement of the hand of the user is collected, and the moving amount of the existing fingertip is as follows:
wherein S ismoveThe lateral movement amount of the fingertip on the sensing area is shown; t ismoveThe longitudinal offset of the fingertip on the sensing area is shown; (x)0，y0) Is a transverse initial position; (x)i，yi) Is a transverse end position; (u)0，v0) Is a longitudinal initial position; (u)i，vi) A longitudinal end position; the transverse initial position, the longitudinal initial position, the transverse end position and the longitudinal end position can be obtained according to the detection operation of each position detection piece arranged in the sensing area.
In addition, if the recognition probe is used to detect the direction of movement between the fingertip and the sensing region and to detect the direction of movement of the adjustment or position of the user, the limiting region between the fingertip and the sensing device is:
wherein D iscauIs a transverse limiting area; gcauIs a longitudinal restriction area; the shielding intersection position of the two and the initial origin is set as a limiting area; taking "+" as the same as the initial moving direction; taking the < - > as the direction opposite to the initial moving direction; l is the length of the sensing region. The initial origin of the touch pad is set to be the position of the upper left corner of the touch screen.
And after the limited area is determined, shielding the line memory address or the column memory address on the display screen corresponding to the touch screen, so that the display shielding of the area can be realized. Conversely, with the above arrangement, each display screen may be divided into each display area for individually displaying the signal of each interface of each connection device in the divided area, and at this time, the limited area may be set as a display area that can be displayed, that is: and communicating the row address of the limited area with the data of the connection interface, and displaying the displayed content in the limited area. If the method is adopted, the modulation device, the connection device and the display screen are matched, signals collected by the connection device and display addresses of the display screen are transmitted through the modulation device, and each independent area in each display screen can be displayed, and the display mode is the same as the display principle of a common liquid crystal screen and is not repeated one by one.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Although the invention has been described above with reference to various embodiments, it should be understood that many changes and modifications may be made without departing from the scope of the invention. That is, the methods, systems, and devices discussed above are examples. Various configurations may omit, substitute, or add various procedures or components as appropriate. For example, in alternative configurations, the methods may be performed in an order different than that described, and/or various components may be added, omitted, and/or combined. Moreover, features described with respect to certain configurations may be combined in various other configurations, as different aspects and elements of the configurations may be combined in a similar manner. Further, elements therein may be updated as technology evolves, i.e., many elements are examples and do not limit the scope of the disclosure or claims.
Specific details are given in the description to provide a thorough understanding of the exemplary configurations including implementations. However, configurations may be practiced without these specific details, for example, well-known circuits, processes, algorithms, structures, and techniques have been shown without unnecessary detail in order to avoid obscuring the configurations. This description provides example configurations only, and does not limit the scope, applicability, or configuration of the claims. Rather, the foregoing description of the configurations will provide those skilled in the art with an enabling description for implementing the described techniques. Various changes may be made in the function and arrangement of elements without departing from the spirit or scope of the disclosure.
In conclusion, it is intended that the foregoing detailed description be regarded as illustrative rather than limiting, and that it be understood that these examples are illustrative only and are not intended to limit the scope of the invention. After reading the description of the invention, the skilled person can make various changes or modifications to the invention, and these equivalent changes and modifications also fall into the scope of the invention defined by the claims.
Claims (8)
1. An intelligent multi-interface controlled liquid crystal screen splicing system is characterized by comprising an induction device, a connecting device, a modulation device, an identification device and a processor, wherein the identification device is used for transmitting the display content of each liquid crystal screen; the induction device is used for collecting the display content of the liquid crystal screen; the connecting device is used for being connected with the data lines of the liquid crystal screens; the modulation device is used for regulating and controlling each path of digital video signal data acquired by the induction device;
the connecting device comprises a plurality of connecting interfaces and a connecting module, wherein the connecting interfaces are arranged on the connecting module and are used for connecting external signal data lines; the connecting module is used for collecting the paths of the signal data lines and transmitting the signals to the modulation device;
the connection module comprises a receiver, an analog-to-digital converter, a feedforward equalizer and a feedback equalizer, wherein the receiver is used for receiving analog signals and sampling the received analog signals through a plurality of sampling circuits; the feedforward equalizer is used for receiving and processing the analog signal to provide a plurality of feedforward equalizer interleaved sampled signal values and applying the feedforward equalizer interleaved sampled signal values to a plurality of sampling circuits; the feedback equalizer processing a plurality of analog signals to obtain a plurality of feedback equalizer interleaved sampled signal values and summing respective outputs of each of the feedforward equalizer interleaved sampled signal values by a summer to provide a feedback equalizer output signal value;
the analog-to-digital converter digitizes the plurality of feedback equalizer output signal values to provide a digital data bit corresponding to each of the plurality of feedback equalizer output signal values and transmits the digital data bits to a display channel of each of the liquid crystal panels;
said modulation means comprises a detector, a programmable sample rate filter, a digital sampler and a memory controller, said detector receiving the rate of change of an input digital video signal; the programmable sample rate filter also receives the input digital video signal; wherein the control signal of the detector controls the programmable sample rate filter in accordance with the rate of change of the digital video signal; the digital sampler receives an input digital video signal through the programmable sample rate filter, wherein the programmable sample rate filter adjusts a time base of the digital video signal to adjust the digital sampler to sample more data from the connection; simultaneously, the control signal from the detector further controls the programmable sample rate filter according to a vertical rate of change of the digital video signal for two frames of image data in a video component; the storage controller stores the digital video signals processed by the detector, the programmable sampling rate filter and the digital sampler and transmits the digital video signals to each display channel of the liquid crystal screen; the storage controller controls the digital video signals in the row storage unit or the column storage unit corresponding to the display channel to be triggered so as to realize display in the display channel;
the modulation device further comprises a data buffer for buffering respective digital video signal data and updating in real-time based on a transition of each sampling circuit, the sampling circuit comprising a sample-and-hold circuit and a track-and-hold circuit connected in series with the sample-and-hold circuit, each track-and-hold circuit being configured to receive and hold a sampled signal value in the track-and-hold circuit during a first refresh time and to transmit the sampled signal value to the sample-and-hold circuit at a subsequent refresh time.
2. The intelligent multi-interface controlled liquid crystal screen splicing system according to claim 1, wherein the sensing device comprises a sensing mechanism, and the sensing mechanism is used for collecting digital video signal output of each liquid crystal screen; the sensing mechanism comprises sensing modules and a timer, and the sensing modules are respectively arranged on the back of each liquid crystal screen and are used for collecting the display content of each liquid crystal screen; the timer is used for timing the refresh time of the digital video signal transmission by the identification device in one period.
3. The intelligent multi-interface controlled LCD splicing system of claim 2, wherein the detectors comprise a relative rate of change detector and an absolute rate of change detector, the relative rate of change detector vertically comparing corresponding portions of the previous line or lines of image data; the absolute rate of change detector also receives an input digital video signal; wherein the absolute change rate detector vertically compares a current horizontal line of image data in two frame video components with a corresponding portion of a previous line or lines of image data supplied to the absolute change rate detector from a line storage unit of the liquid crystal panel.
4. The intelligent multi-interface control liquid crystal screen splicing system according to claim 3, wherein the line storage unit comprises a line memory address, and the line memory address is used for marking a display channel corresponding to the liquid crystal screen; the memory controller addresses a display channel corresponding to a memory address of a line, and transmits the digital video signal to the display channel when the addressing is correct.
5. The intelligent multi-interface controlled liquid crystal screen splicing system according to claim 4, wherein the column storage units comprise column memory addresses, and the column memory addresses are used for marking display channels corresponding to the liquid crystal screens; and the storage controller is used for addressing the display channel corresponding to the column memory address, and transmitting the digital video signal to the display channel after the addressing is correct.
6. The intelligent multi-interface controlled liquid crystal screen splicing system according to claim 5, wherein the modulation device further comprises a limiting module, the limiting module is used for adjusting a display range in a display area of the display screen to realize control over any display size of the display range, the limiting module comprises a touch screen, a selection unit, an analysis unit and an identification unit, the touch screen is used for identifying operation of a user and performing control input of the display range on the display screen according to the selection unit arranged on the touch screen; the analysis unit is used for analyzing the input of the selection unit, controlling the address of the line memory or the row memory based on the input of the selection unit, and determining the address of the mapped line memory or row memory in the display area through the mapping of the touch screen and the display area of the display screen; the identification unit reads the address of the line memory or the row memory, determines the area range and the coordinate position of the display interface through the identification submodule, and forms a new screen display area.
7. The intelligent multi-interface control liquid crystal screen splicing system according to claim 6, wherein the selection unit comprises a sensing area, a plurality of position detection pieces and an identification probe, a boss for placing the identification probe is formed by protruding a frame of the touch screen, the identification probe is used for identifying gestures of an operator, the identification probe faces the sensing area, and meanwhile, the direction of shifting or the position of shifting of the gestures of the operator in the sensing area is detected.
8. The system according to claim 7, wherein during the operation of the selection unit, the user collects the hand displacement of the user through the sensing area, and the amount of movement of the fingertips is:
wherein S ismoveThe lateral movement amount of the fingertip on the sensing area is shown; t ismoveThe longitudinal offset of the fingertip on the sensing area is shown; (x)0，y0) Is a transverse initial position; (x)i，yi) Is a transverse end position; (u)0，v0) Is a longitudinal initial position; (u)i，vi) A longitudinal end position; the transverse initial position, the longitudinal initial position, the transverse end position and the longitudinal end position are detected according to the position detection pieces arranged in the sensing area.
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