CN108898998B - Driving method, variable frequency driving method and system, medium and chip - Google Patents
Driving method, variable frequency driving method and system, medium and chip Download PDFInfo
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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- G09G3/3614—Control of polarity reversal in general
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Abstract
The invention provides a driving system, for a signal with periodicity or partial periodicity, the signal is provided with at least one signal set, wherein the voltage difference between corresponding parts of the signal set in a previous time period and a later time period is opposite; the previous time period is as follows: the previous cycle, or the previous several cycles; the later time period is as follows: the latter period, or the latter several periods. The invention also provides a frequency conversion driving method and system, a medium and a chip. Compared with the prior art, the invention has the following beneficial effects: the driving method provided by the invention can greatly improve the refresh rate by utilizing the signal periodicity.
Description
Technical Field
The present invention relates to the field of driving of electronic devices, and in particular, to a driving method, a variable frequency driving method and system, a medium, and a chip.
Background
For some electronic devices, it may be desirable for various reasons that the sum of the voltages of the signals applied over a certain time be 0. For example, in the case of a liquid crystal display panel, irreversible damage may occur due to the liquid crystal molecules being deflected for a long time under a voltage of one polarity. Therefore, the liquid crystal display panel or Liquid Crystal On Silicon (LCOS) chip adopts a direct current BALANCE (DC BALANCE) driving scheme, such as displaying an image at 360Hz, with a display time of 2.78ms per frame, and for an input signal with a voltage difference of 3.7V over one pixel, a Vcom voltage is applied to the top glass substrate in the first 1.39ms, a Vcom +3.7V is applied to the bottom surface, a Vcom +3.7V is applied to the top glass substrate in the second 1.39ms, a Vcom voltage is applied to the bottom surface, polarities of the top and bottom surfaces in the first 1.39ms and the second 1.39ms are completely opposite, and the direction of the voltage difference applied to the middle liquid crystal layer is also completely opposite and is 0. Also for example, communication applications, particularly high speed serial buses, require the use of DC balancing.
For liquid crystal devices, through the design or modulation of a physical layer, the modulation (phase difference) of incident light generated by the state modulated by the voltage difference with opposite positive and negative polarities is the same, the same light output is obtained, and the sum of the voltage difference of the liquid crystal is 0 within 2.78ms, so that the charge accumulation cannot be generated, and the device cannot be damaged after long-time work. However, this driving method can reduce the refresh rate of the device due to the existence of the dc-balancing strategy. While for some applications the input or output signal is periodic, for example, LCoS is used as a spatial light modulator for phase modulation, as an OPA device for controlling the emission of a light beam, in lidar applications.
Upon search, it was found that patent document CN101165547A discloses that the polarity of the voltage applied to the pixel satisfies the dc balance condition, and gives a change in the voltage difference in four consecutive frames of + - +. However, the n-2, n-1, n, n +1 frames proposed in CN101165547A are all directed to patterns with the same content, that is, one frame pattern is split into four frames, in order to realize DC BALANCE and eliminate odd and even lines (if the content of n-2, n-1, n, n +1 frames is different, since the document does not mention the specificity or periodicity of the input content, the input pattern has unpredictability, the sum of + -voltages of these 4 frames is not exactly 0 under normal conditions, and the DC BALANCE condition cannot be satisfied, that is, DC BALANCE is not satisfied, which may result in device damage, see paragraphs 2 and 3 of the specification of the patent document).
In the present invention, the main feature is that, especially for the time-periodic display content (periodic input/output), one period can include any number of frames of signals with different contents (e.g. 50 frames, 100 frames), rather than performing polarity inversion in the self period of a single frame, DC BALANCE is performed in units of large periods. Furthermore, the invention mainly solves the problem that the refresh rate is improved, and for the signal content which is periodic in time, direct current balance is not needed in one display period of the invention, namely 1 frame of image is displayed in 1 frame, and the refresh rate is doubled. However, the problem of odd-even lines between rows and columns is solved by this reference, which actually results in the effect that 1 frame image is displayed with 4 frame image, the refresh rate is doubled compared to the conventional DC BALANCE scheme, and the problem to be solved by the present invention is contradictory.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a driving method, a variable-frequency driving method and system, a medium and a chip.
According to the driving system provided by the invention, for a signal with periodicity or partial periodicity, the signal is provided with at least one signal set, wherein the voltage difference between corresponding parts of the signal set in a previous time period and a later time period is opposite;
the previous time period is as follows: the previous cycle, or the previous several cycles;
the later time period is as follows: the latter period, or the latter several periods.
In particular, the previous time period and the next time period may be consecutive time periods or non-consecutive time periods.
According to the driving system provided by the invention, for a signal group formed by combining a plurality of signals in terms of time, the sum of the voltage differences of corresponding parts of any part of the signal group in the time dimension of the whole signal group is 0.
According to the driving method provided by the invention, for a signal with periodicity or partial periodicity, the signal is provided with at least one signal set, wherein the voltage difference of corresponding parts of the signal sets in a first time period and a second time period is opposite;
the first time period is as follows: the previous cycle, or the previous several cycles;
the second time period is as follows: the latter period, or the latter several periods.
According to a driving method provided by the present invention, for a signal group formed by temporally combining a plurality of signals, the sum of voltage differences of corresponding parts of any part of the signal group in the time dimension of the whole signal group is 0.
Preferably, the sum of the voltage or the current in the first period and the second period is 0.
Preferably, the voltage difference is applied across the electronic device.
Preferably, the two ends of the electronic device are any one of WAFER, glass substrate or a combination of any plurality of items.
Preferably, the voltage difference is a driving voltage difference;
according to the frequency conversion driving method provided by the invention, a part of signals are subjected to instant direct current balance or a direct current balance part of the part of signals is inserted in one or more next periods, and the other part of signals are subjected to direct current balance according to the period.
The variable frequency driving system is characterized in that one part of signals are subjected to instant direct current balance or inserted into the direct current balance part of the signals in one or more later periods, and the other part of signals are subjected to direct current balance according to the period.
Preferably, for the polarity orientation of the previous or last cycles, the polarity orientation of any pixel point in the last or last cycles is opposite to that of the other part of the signal.
Preferably, the part of the input and output signals has periodicity, the non-periodic part signal is used as the part of the signals to perform instant dc balance or the dc balance part of the same part signal is inserted in one or more next periods, and the part of the signals having periodicity is used as the other part of the signals to perform dc balance according to the period.
Preferably, the aperiodic part signal is an inserted burst signal.
According to the driving method provided by the invention, any one of the following methods is adopted:
-a driving method according to claim 3;
-a driving method according to claim 4;
-a driving method according to claim 9.
According to the invention, the driving system comprises any one of the following systems:
-a drive system according to claim 1;
-a drive system according to claim 2;
-a drive system according to claim 10.
According to the present invention, a computer-readable storage medium or ASIC chip is provided, in which a computer program is stored, which computer program, when being executed by a processor, carries out the steps of the method according to any of the claims 3, 4, 9, 14.
Preferably, the device driven by the driving system is a liquid crystal on silicon device, a liquid crystal device or a communication device. In particular, the counterpart may be, for example, a counterpart region or plate for a pixel, and may be, for example, two poles corresponding to a balanced code in data communication.
Preferably, the drive system outputs a synchronization signal of the signal.
Preferably, the input and output signals of the driving system further include a flag bit, and the flag bit is used to identify at least one of the following information: whether the corresponding input signal is a periodic signal, the polarity of the period of the periodic signal, the signal maintaining time, whether the signal is an insertion signal, and whether the insertion signal is subjected to direct current balance in the period.
Compared with the prior art, the invention has the following beneficial effects:
the driving method provided by the invention can greatly improve the refresh rate by utilizing the signal periodicity.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
According to the driving system provided by the invention, for a signal with periodicity or partial periodicity, the signal is provided with at least one signal set, wherein the voltage difference between corresponding parts of the signal set in a previous time period and a later time period is opposite;
the previous time period is as follows: the previous cycle, or the previous several cycles;
the later time period is as follows: the latter period, or the latter several periods.
In particular, the previous time period and the next time period may be consecutive time periods or non-consecutive time periods.
According to the driving system provided by the invention, for a signal group formed by combining a plurality of signals in terms of time, the sum of the voltage differences of corresponding parts of any part of the signal group in the time dimension of the whole signal group is 0.
According to the driving method provided by the invention, for a signal with periodicity or partial periodicity, the signal is provided with at least one signal set, wherein the voltage difference of corresponding parts of the signal sets in a first time period and a second time period is opposite;
the first time period is as follows: the previous cycle, or the previous several cycles;
the second time period is as follows: the latter period, or the latter several periods.
According to a driving method provided by the present invention, for a signal group formed by temporally combining a plurality of signals, the sum of voltage differences of corresponding parts of any part of the signal group in the time dimension of the whole signal group is 0.
Preferably, the sum of the voltage or the current in the first period and the second period is 0.
Preferably, the voltage difference is applied across the electronic device.
Preferably, the two ends of the electronic device are any one of WAFER, glass substrate or a combination of any plurality of items.
Preferably, the voltage difference is a driving voltage difference;
according to the frequency conversion driving method provided by the invention, a part of signals are subjected to instant direct current balance or a direct current balance part of the part of signals is inserted in one or more next periods, and the other part of signals are subjected to direct current balance according to the period.
The variable frequency driving system is characterized in that one part of signals are subjected to instant direct current balance or inserted into the direct current balance part of the signals in one or more later periods, and the other part of signals are subjected to direct current balance according to the period.
Preferably, for the polarity orientation of the previous or last cycles, the polarity orientation of any pixel point in the last or last cycles is opposite to that of the other part of the signal.
Preferably, the part of the input and output signals has periodicity, the non-periodic part signal is used as the part of the signals to perform instant dc balance or the dc balance part of the same part signal is inserted in one or more next periods, and the part of the signals having periodicity is used as the other part of the signals to perform dc balance according to the period.
Preferably, the aperiodic part signal is an inserted burst signal.
According to the driving method provided by the invention, any one of the following methods is adopted:
-a driving method according to claim 3;
-a driving method according to claim 4;
-a driving method according to claim 9.
According to the invention, the driving system comprises any one of the following systems:
-a drive system according to claim 1;
-a drive system according to claim 2;
-a drive system according to claim 10.
According to the present invention, a computer-readable storage medium or ASIC chip is provided, in which a computer program is stored, which computer program, when being executed by a processor, carries out the steps of the method according to any of the claims 3, 4, 9, 14.
Preferably, the device driven by the driving system is a liquid crystal on silicon device, a liquid crystal device or a communication device. In particular, the corresponding portion may be, for example, a corresponding plate for a pixel, and may be, for example, two poles corresponding to a balanced code in data communication.
Preferably, the drive system outputs a synchronization signal of the signal.
Preferably, the input and output signals of the driving system further include a flag bit, and the flag bit is used to identify at least one of the following information: whether the corresponding input signal is a periodic signal, the polarity of the period of the periodic signal, the signal maintaining time, whether the signal is an insertion signal, and whether the insertion signal is subjected to direct current balance in the period.
The present invention will be described in more detail below by way of preferred examples.
Periodic and burst signals
The input and output signals have periodicity in part and burst in part, such as inserted burst signals. Taking the application of the laser radar as an example, most of the input and output signals of the transmitting system are periodic scanning signals, but after the receiving system receives the feedback signal of the external object, the control system needs to interrupt the original periodic scanning in some cases, and inserts some burst signals to further confirm and detect the feedback, and at this time some burst aperiodic signals are inserted into the transmitting system.
Mode of multi-frame combined signal
Further, one signal group formed by combining a plurality of signals in time, for example, a combined signal of a plurality of frames of a burst or non-burst, periodic or non-periodic signal, may be driven by a multi-frame combined signal in time in the entire output period to perform dc balance. For example, for a 5-frame signal combination, for a certain pixel in the liquid crystal device, in the first frame, the voltage at the upper end of the liquid crystal layer of the pixel is 5V, and in the second frame, the voltage at the upper end of the liquid crystal layer of the pixel is 4V, and the voltage at the lower end of the liquid crystal layer of the pixel is 0V. In the third frame, the upper end voltage of the liquid crystal layer of the pixel point is-5.5V, the lower end voltage is 0V, in the fourth frame, the upper end voltage of the pixel point is 1V, the lower end voltage is 0V, in the fifth frame, the upper end voltage of the pixel point is-4.5V, and the lower end voltage is 0V. In the output period of 5 frames, the sum of the respective voltage differences at the two ends is 0, and other pixel points are also the same, and the voltage differences in each frame can be different and are not opposite, but the sum of the voltage differences in the combination of 5 frames is 0. Since the voltages are balanced throughout the period of such a combined frame, the subsequent signal does not need to take any dc-balanced type of operation.
The above driving strategies can be combined at will, for example, for a periodic signal, the driving is performed in a manner of inverting the polarity of the signal according to a large output period, for a burst partial insertion signal, the driving is performed in a manner of multi-frame combined signal, the corresponding combination can be calculated, and for a burst insertion signal which cannot calculate a proper frame combination or has a single frame, the driving can be performed in a conventional instantaneous direct current balance manner
In the signal without considering the dc balance, for example, the positive and negative polarities (devices whose positive and negative polarities can obtain the same output effect) of the corresponding portion (for example, each pixel) of the next signal in the same period may determine the polarity orientation according to the response speed of the device (for example, the time of liquid crystal molecule deflection) when the positive or negative polarity is taken (the liquid crystal device is related to the size of the liquid crystal deflection angle, generally, the smaller the rotation angle is, the faster the rotation angle is, and is also related to the packaging mode of the material, for example, the ECB mode is faster when the electric power is applied to deviate from the initial position of the liquid crystal molecules, the speed when the non-electric liquid crystal molecules are restored to the initial position is, and the VAN mode is slower when the electric power is applied to deviate from the initial position of the liquid crystal molecules, and the speed. With the periodic signal of the driving method, as the polarity orientations of the corresponding parts (pixel points) between the same frames in the next output period are opposite, as long as the display sequence of each frame in the next output period is consistent, the polarity orientation in the next output period also has the optimal response speed due to the setting of the polarity between each frame in the previous output period.
The method is realized by a control and drive system integrated on an electronic system, wherein the control system can be based on an FPGA (field programmable gate array) or a CPLD (complex programmable logic device) system, or can be based on an ASIC (application specific integrated circuit) chip, or any chip or combination of chips in a DSP (digital signal processor), a CPU (central processing unit), a GPU (graphics processing unit) and a singlechip.
The control system controls and drives the devices requiring DC BALANCE drive while synchronizing other devices in the system, such as the light source (single laser, multiple lasers) in the lidar, the receiving system (single APD, one or two dimensional APD array), etc. The control system may also change the drive strategy according to external requirements or circumstances, such as changing the drive frequency according to an external signal, adjusting the frequency according to the temperature output by the temperature sensor, etc.
The control system can also decide whether to prolong or shorten the time of any frame with periodicity or non-periodicity in the signal according to an external signal, and perform instant DC balance compensation, or compensate the DC balance part corresponding to the signal in a later period.
The present invention will be further described with reference to preferred embodiments.
Example 1
A scanning reception system (e.g., lidar) uses a pure phase liquid crystal on silicon (LCoS) based opa (optical phase array) in combination with a laser as a transmit module. The transmitting module displays 120 frames of images in total and repeatedly scans at 480Hz, namely each frame of image displays 2.08 ms. For example, each frame includes 2 line segments, 120 frames include 240 line segments together, each line segment has different positions or angles, the 240 line segments are output within 0.25 second, and the 120 frames of images are repeatedly displayed within the next 0.25 second, that is, 4 scans are completed every 1 second.
According to the traditional driving mode, direct current balance must be executed, each frame of image needs to be divided into two according to the time sequence, and opposite pressure differences are applied to the silicon-based chip and the ITO glass electrode in two time periods. So that the sum of the voltage differences of the two ends of the intermediate liquid crystal layer in a complete frame time is 0. For example, a voltage Vcom +6V is applied to the silicon chip within the first 1.04ms, the voltage Vcom is applied to the ITO glass, a voltage Vcom-6V is applied to the silicon chip within the second 1.04ms, and the voltage Vcom is applied to the electrode of the ITO glass; alternatively, the voltage Vcom may be applied to the silicon chip within the first 1.04ms, the voltage Vcom +6V may be applied to the ITO glass, the voltage Vcom +6V may be applied to the silicon chip within the second 1.04ms, and the voltage Vcom may be applied to the electrode of the ITO glass.
By adopting the driving method of the invention, 120 frames of images which are periodically and repeatedly displayed can be taken as a whole and recorded as an output period, and in the output period of 0.25 second for displaying the first 120 frames of images, no direct current balance is carried out, and each frame of image is displayed according to the required voltage. For example, in the first 0.25 second output period, the voltage applied to the electrode of the ITO glass substrate is Vcom, the voltage applied to the silicon chip side is Vcom + Vx, Vx changes with x, and x e (1, 120). In consideration of the dc isolation effect, during this period, the voltage applied to the electrodes of the ITO glass substrate for all odd frames is Vcom, the voltage applied to the silicon chip side is Vcom + Vx, the voltage applied to the electrodes of the ITO glass substrate for all even frames is Vcom, and the voltage applied to the silicon chip side is Vcom-Vx (note that the display content of the odd frames and the even frames is different from that of the conventional dc balance strategy). In the second 0.25 second output period, since the displayed 120 frames of images are completely the same, it can be assumed that the polarities of the pixels of all frames are reversed from the polarities in the last 0.25 second at this time (for example, the voltage applied to the electrodes of the ITO glass substrate for all odd frames is Vcom, the voltage applied to the silicon chip side is Vcom-Vx, the voltage applied to the electrodes of the ITO glass substrate for all even frames is Vcom, and the voltage applied to the silicon chip side is Vcom + Vx). Finally, in the whole time period of 0.5 second, the sum of the pressure differences at the two ends of all the pixel points is 0, and the device cannot be damaged. Meanwhile, because the traditional direct current balance does not exist, the time of each frame is changed into 2.08ms, namely the response time of the device only needs to be less than 2.08ms, and the method is greatly reduced compared with the traditional method. Or the scanning frequency can be doubled if all other conditions of the material, the device are the same.
In the above example, the polarities may be recorded by pixels, or by rows and columns, or by blocks, and it is not necessary to obtain the same polarity on the whole frame signal, for example, Vcom + Vx may be obtained on the silicon-based chip in the odd rows in the previous or several previous output periods, Vcom is applied to the electrode of the glass substrate, Vcom-Vx is obtained on the silicon-based chip in the even rows, and Vcom is applied to the electrode of the glass substrate; in the last or later output period, Vcom-Vx is applied to the silicon-based chip of the odd-numbered lines, Vcom is applied to the electrode of the glass substrate, Vcom + Vx is applied to the silicon-based chip of the even-numbered lines, and Vcom is applied to the electrode of the glass substrate.
The polarity is recorded according to time, the polarity can be plus polarity in the first few frames and minus polarity in the last few frames, the polarity does not need to be consistent in a single output period, and the sum of two or more output periods is 0.
Example 2.
A scanning and receiving system, the scanning frequency is variable. Such as for use as a lidar, uses a liquid crystal-based spatial light modulator (e.g., liquid crystal on silicon, or liquid crystal panel) to control the output beam direction. In a normal period, 240 different images exist in the control and drive system, when the system does not detect any feedback signal, scanning is carried out periodically in a 480Hz mode, wherein the output contents of the first 240 frames of holograms/kinoforms are consistent with those of the second 240 frames of holograms/kinoforms, and the sum of the voltage difference of two ends of a liquid crystal layer of any pixel point in the two frames is 0 in the corresponding frame of the first 240 frames of images and the second 240 frames of images. The control system synchronizes the emission and detection of the light source and the receiving system at 480 Hz.
When the system detects a feedback signal, it is necessary to insert a confirmation of the burst or a further detected signal, for example to further emit a beam of smaller angle, to improve the scanning accuracy. At this time, due to the uncertainty of the inserted burst signal, immediate direct current balance needs to be performed on the burst signal, that is, the number of the inserted signal frames is an even number, wherein the signal output contents of the previous odd frame and the next even frame are completely the same, but the sum of the voltage differences between two ends of any pixel point in the odd frame and the even frame is 0. The scanning frequency of the actual insertion signal becomes 480/2-240 Hz. At this time, the control system can drive the light source and the receiving system to output and receive in both the odd frame and the even frame of the insertion frame, perform the same detection twice, and also can close the light source and the receiving system in one of the odd frame and the even frame.
In addition, for the insertion signal, dc balance may be performed in a subsequent period, for example, a 3-frame burst signal is inserted into a 240-frame signal in a previous period, and in this case, it may be selected that the 3-frame burst signal is not dc balanced in the previous period, but the 3-frame signal is continuously inserted in a next period, but polarity is reversed, so that dc balance is achieved, that is, the number of scanning frames in the next period is 243 frames, and periodic signal scanning of 240 frames is resumed in the next period.
In addition, the insertion may be in the form of a combination of signals, such as when the system is periodically scanning, the signals are detected between the angle of 10 degrees to 11 degrees in the X direction and the angle of 10 degrees to 10 degrees in the Y direction, the signal precision needs to be further reduced to be in the range of 0.25 degree in the X direction, then a specially calculated 4-frame combination output at 480Hz frequency can be adopted to respectively output light beam signals between X direction angle 10.00-10.25 degrees, 10.26-10.50 degrees, 10.51-10.75 degrees, 10.76-11.00 degrees, Y direction angle-10 degrees, and the sum of the voltage differences of two ends of the liquid crystal layer of any pixel point on the device in the whole time range of the four frames is 0, for example, the pressure difference between two ends of a certain pixel point in a first frame is +5V, the pressure difference between two ends of a second frame is 0V, the pressure difference between two ends of a third frame is-3.1V, and the pressure difference between two ends of a fourth frame is-1.9V. In this case, even if a signal is inserted, a special dc balance drive is not required, so that the scanning frequency can be increased, and the control system does not need to modulate the signals of the synchronized light source and receiving system.
In addition, the burst signal may be an extension of each frame in a 240-frame signal, for example, in a certain frame of a certain scanning period of the lidar, the system receives a feedback signal, but needs to further confirm that it is desired that this frame is maintained for a certain period of time without refresh, but this time is often shorter than the time for refreshing one frame, for example, for a 480Hz signal, the duration of each frame signal is about 2.1ms, but it is desired that this frame image is maintained for 0.2ms after 2.1ms, and this extra 0.2ms may also be inserted as a frame burst image at this time, except that it does not need to re-input data and refresh, and it only needs to maintain the previous frame image for an extra time. Also in the next cycle, when dc balancing is performed for this picture, this extra 0.2ms is also performed as a burst of inserted pictures. Of course, the data does not need to be input again and refreshed, and only the last frame of image needs to be maintained for an additional time.
The combined signal and the periodic signal may be pre-calculated and stored in the control system, or may be generated in real time, and when the liquid crystal device is driven, the periodic signal inverts the voltage difference between the same output signal of the previous period and the same output signal of the next period at two ends of the device according to a certain strategy. However, if the periodic signal is also output in the above signal combination manner, it is not necessary to distinguish the previous output period from the next output period, and the signals are output in the same manner at all times, and it is not necessary to take the direction pressure difference in cycles.
In addition, a flag-like signal may be added to the signal to identify the characteristics of the input signal, such as whether the signal is a periodic signal, the polarity to be loaded in the period, the time for signal to be maintained, whether the signal is a burst signal, whether the dc balance is performed in the period, and the like. For example, in the above example, a flag bit of the hold time may be added, and the hold time may be increased for 0.2ms of the pull-in.
Those skilled in the art will appreciate that, in addition to implementing the systems, apparatus, and various modules thereof provided by the present invention in purely computer readable program code, the same procedures can be implemented entirely by logically programming method steps such that the systems, apparatus, and various modules thereof are provided in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers and the like. Therefore, the system, the device and the modules thereof provided by the present invention can be considered as a hardware component, and the modules included in the system, the device and the modules thereof for implementing various programs can also be considered as structures in the hardware component; modules for performing various functions may also be considered to be both software programs for performing the methods and structures within hardware components.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (35)
1. A driving system is characterized in that for a signal with periodicity or part periodicity repetition, the signal content is periodic in time, direct current balance is not needed in one display period of the signal, one frame of image is displayed, the signal is provided with at least one signal set, wherein the voltage difference between corresponding parts of the signal set in a previous time period and a later time period is opposite;
the previous time period is as follows: the previous cycle, or the previous several cycles;
the later time period is as follows: the latter period, or the latter several periods.
2. The system of claim 1, wherein the sum of the voltage or current in the first time period and the second time period is 0.
3. The system of claim 1, wherein the two ends of the electronic device are any one of WAFER wafe, glass substrate, or a combination of any plurality of the same.
4. The system of any one of claims 1 to 3, wherein the voltage difference is a driving voltage difference.
5. A drive system, wherein for a signal group consisting of more than two signals in time, the sum of the voltage differences of corresponding parts of any part of the signal group in the time dimension of the whole signal group is 0;
the multiple frames combine the signal in such a way that the difference values are different for each frame.
6. The system of claim 5, wherein the voltage differential is applied across the electronic device.
7. The system of claim 6, wherein the two ends of the electronic device are any one of WAFER wafe, glass substrate, or a combination of any plurality of the same.
8. The system of any one of claims 5 to 7, wherein the voltage difference is a driving voltage difference.
9. A driving method is characterized in that for a signal with periodicity or partial periodicity repetition, for the signal content which is periodic in time, one display period of the signal does not need direct current balance, one frame displays one frame image, and the signal is provided with at least one signal set, wherein the voltage difference of the signal set between corresponding parts of a first time period and a second time period is opposite;
the first time period is as follows: the previous cycle, or the previous several cycles;
the second time period is as follows: the latter period, or the latter several periods.
10. The method of claim 9, wherein the sum of the voltage or current in the first time period and the second time period is 0.
11. The method according to claim 9 or 10, wherein the voltage difference is a driving voltage difference.
12. A driving method is characterized in that, for a signal group formed by combining more than two signals in terms of time, the sum of voltage differences of corresponding parts of any part of the signal group in the time dimension of the whole signal group is 0;
the multiple frames combine the signal in such a way that the difference values are different for each frame.
13. The method of claim 12, wherein the voltage difference is applied across the electronic device.
14. The method of claim 13, wherein the two ends of the electronic device are any one of WAFER wafe, glass substrate, or a combination of any plurality of the above.
15. The method according to any one of claims 12 to 14, wherein the voltage difference is a driving voltage difference.
16. A frequency conversion driving method is characterized in that a part of signals are subjected to instant direct current balance or inserted into a direct current balance part of the part of signals in one or more next periods, and the other part of signals are subjected to direct current balance according to the period;
the input and output signals have periodicity in part, non-periodic partial signals are used as the partial signals to carry out instant direct current balance, or the direct current balance part of the same partial signals is inserted in one or more later periods, and the partial signals with periodicity are used as the other partial signals to carry out direct current balance according to the period.
17. The method of claim 16, wherein for the other portion of the signal, the polarity orientation of any pixel point in the previous or subsequent cycles is reversed with respect to the polarity orientation of the previous or subsequent cycles.
18. The method of claim 16, wherein the aperiodic partial signal is an inserted burst signal.
19. A frequency conversion driving system is characterized in that a part of signals are subjected to instant direct current balance or inserted into a direct current balance part of the part of signals in one or more next periods, and the other part of signals are subjected to direct current balance according to the period;
the input and output signals have periodicity in part, non-periodic partial signals are used as the partial signals to carry out instant direct current balance, or the direct current balance part of the same partial signals is inserted in one or more later periods, and the partial signals with periodicity are used as the other partial signals to carry out direct current balance according to the period.
20. The system of claim 19, wherein for the other portion of the signal, the polarity orientation of any pixel point in the previous or subsequent cycles is reversed with respect to the polarity orientation of the previous or subsequent cycles.
21. The system of claim 20, wherein the input/output signals have periodicity in part, the non-periodic partial signal is used as the partial signal to perform an instant dc balance or the dc balance part of the same partial signal is inserted in one or more subsequent periods, and the periodic partial signal is used as the other partial signal to perform a dc balance periodically.
22. The system of claim 21, wherein the aperiodic partial signal is an inserted burst signal.
23. A driving method characterized by employing any of the following methods:
-a driving method according to claim 9;
-a driving method according to claim 12;
-the driving method according to claim 16.
24. A drive system, comprising any of the following:
-a drive system according to claim 1;
-a drive system according to claim 5;
-a drive system according to claim 19.
25. A computer-readable storage medium or ASIC chip storing a computer program, characterized in that the computer program, when being executed by a processor, realizes the steps of the method of any of claims 9, 12, 16, 23.
26. A driving system is characterized in that for a signal with periodicity or part periodicity repetition, the signal content is periodic in time, direct current balance is not needed in one display period of the signal, one frame of image is displayed, the signal is provided with at least one signal set, wherein the voltage difference between corresponding parts of the signal set in a previous time period and a later time period is opposite;
the previous time period is as follows: the previous cycle, or the previous several cycles;
the later time period is as follows: the latter cycle, or the latter several cycles;
the device driven by the driving system is a Liquid Crystal On Silicon (LCOS), a liquid crystal device or a communication device.
27. A drive system, wherein for a signal group consisting of more than two signals in time, the sum of the voltage differences of corresponding parts of any part of the signal group in the time dimension of the whole signal group is 0; the multi-frame combined signal mode is that the pressure difference value of each frame is different;
the device driven by the driving system is a Liquid Crystal On Silicon (LCOS), a liquid crystal device or a communication device.
28. A frequency conversion driving system is characterized in that a part of signals are subjected to instant direct current balance or inserted into a direct current balance part of the part of signals in one or more next periods, and the other part of signals are subjected to direct current balance according to the period;
the device driven by the driving system is a silicon-based liquid crystal, a liquid crystal device or a communication device;
the input and output signals have periodicity in part, non-periodic partial signals are used as the partial signals to carry out instant direct current balance, or the direct current balance part of the same partial signals is inserted in one or more later periods, and the partial signals with periodicity are used as the other partial signals to carry out direct current balance according to the period.
29. A driving system is characterized in that for a signal with periodicity or part periodicity repetition, the signal content is periodic in time, direct current balance is not needed in one display period of the signal, one frame of image is displayed, the signal is provided with at least one signal set, wherein the voltage difference between corresponding parts of the signal set in a previous time period and a later time period is opposite;
the previous time period is as follows: the previous cycle, or the previous several cycles;
the later time period is as follows: the latter cycle, or the latter several cycles;
the driving system outputs a synchronization signal of the signal.
30. A drive system, wherein for a signal group consisting of more than two signals in time, the sum of the voltage differences of corresponding parts of any part of the signal group in the time dimension of the whole signal group is 0; the multi-frame combined signal mode is that the pressure difference value of each frame is different;
the driving system outputs a synchronization signal of the signal.
31. A frequency conversion driving system is characterized in that a part of signals are subjected to instant direct current balance or inserted into a direct current balance part of the part of signals in one or more next periods, and the other part of signals are subjected to direct current balance according to the period;
the driving system outputs a synchronous signal of the signal;
the input and output signals have periodicity in part, non-periodic partial signals are used as the partial signals to carry out instant direct current balance, or the direct current balance part of the same partial signals is inserted in one or more later periods, and the partial signals with periodicity are used as the other partial signals to carry out direct current balance according to the period.
32. A driving system is characterized in that for a signal with periodicity or part periodicity repetition, for the signal content with periodicity in time, one frame displays one frame image without direct current balance in one display period of the signal, so that the signal has at least one signal set, wherein the voltage difference between corresponding parts of the signal set in the previous time period and the signal set in the next time period is opposite;
the previous time period is as follows: the previous cycle, or the previous several cycles;
the later time period is as follows: the latter cycle, or the latter several cycles;
the input and output signals of the driving system also comprise a flag bit, and the flag bit is used for identifying at least one of the following information: whether the corresponding input signal is a periodic signal, the polarity of the period of the periodic signal, the signal maintaining time, whether the signal is an insertion signal, and whether the insertion signal is subjected to direct current balance in the period.
33. A drive system, wherein for a signal group consisting of more than two signals in time, the sum of the voltage differences of corresponding parts of any part of the signal group in the time dimension of the whole signal group is 0; the multi-frame combined signal mode is that the pressure difference value of each frame is different;
the input and output signals of the driving system also comprise a flag bit, and the flag bit is used for identifying at least one of the following information: whether the corresponding input signal is a periodic signal, the polarity of the period of the periodic signal, the signal maintaining time, whether the signal is an insertion signal, and whether the insertion signal is subjected to direct current balance in the period.
34. A driving method is characterized in that for a signal with periodicity or partial periodicity repetition, for the signal content which is periodic in time, one display period of the signal does not need direct current balance, one frame displays one frame image, and the signal is provided with at least one signal set, wherein the voltage difference of the signal set between corresponding parts of a first time period and a second time period is opposite;
the first time period is as follows: the previous cycle, or the previous several cycles;
the second time period is as follows: the latter cycle, or the latter several cycles;
the input and output signals of the driving method further comprise a flag bit, and the flag bit is used for identifying at least one of the following information: whether the corresponding input signal is a periodic signal, the polarity of the period of the periodic signal, the signal maintaining time, whether the signal is an insertion signal, and whether the insertion signal is subjected to direct current balance in the period.
35. A driving method is characterized in that, for a signal group formed by combining more than two signals in terms of time, the sum of voltage differences of corresponding parts of any part of the signal group in the time dimension of the whole signal group is 0; the multi-frame combined signal mode is that the pressure difference value of each frame is different;
the input and output signals of the driving method further comprise a flag bit, and the flag bit is used for identifying at least one of the following information: whether the corresponding input signal is a periodic signal, the polarity of the period of the periodic signal, the signal maintaining time, whether the signal is an insertion signal, and whether the insertion signal is subjected to direct current balance in the period.
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| CN101859544B (en) * | 2004-08-13 | 2012-07-04 | 伊英克公司 | Method and apparatus for driving electro-optic display |
| JP4479710B2 (en) * | 2006-11-01 | 2010-06-09 | ソニー株式会社 | Liquid crystal drive device, liquid crystal drive method, and liquid crystal display device |
| CN101188091A (en) * | 2006-11-17 | 2008-05-28 | 上海广电Nec液晶显示器有限公司 | A LCD scanning drive method |
| CN103761946A (en) * | 2013-12-25 | 2014-04-30 | 深圳市华星光电技术有限公司 | Data signal polarity-reversal driving method and liquid crystal display panel image display method |
| CN105047175B (en) * | 2015-09-17 | 2018-03-30 | 深圳市华星光电技术有限公司 | Display device and its driving method |
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