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CN-121171183-B - Liquid crystal display driving circuit dynamic regulating system facing low power consumption requirement

CN121171183BCN 121171183 BCN121171183 BCN 121171183BCN-121171183-B

Abstract

The invention relates to the technical field of liquid crystal display driving, and discloses a dynamic adjusting system of a liquid crystal display driving circuit facing to low power consumption requirements. The system comprises a power consumption characteristic extraction module, a power consumption dynamic allocation module, a scanning strategy optimization module, a time sequence control reconstruction module and a driving signal conversion module. The power consumption characteristic extraction module collects real-time power consumption parameters of each area and establishes an area power consumption characteristic map, the power consumption dynamic distribution module analyzes the power consumption fluctuation difference and generates a partition power consumption quota matrix in combination with a preset threshold value, the scanning strategy optimization module adjusts a line scanning sequence and a column scanning frequency according to the power consumption fluctuation difference to generate an adaptive scanning strategy table, the time sequence control reconstruction module reconstructs synchronous signal time sequence logic and outputs dynamic time sequence control waveforms, and the driving signal conversion module converts the generated control signals and feeds back actual driving power consumption data. The system realizes the dynamic adjustment of the driving circuit of the liquid crystal display and adapts to the low power consumption requirement.

Inventors

  • LIU PINGHE

Assignees

  • 钜汉显示技术(深圳)有限公司

Dates

Publication Date
20260508
Application Date
20250905

Claims (10)

  1. 1. The dynamic regulation system for the liquid crystal display drive circuit facing the low power consumption requirement is characterized by comprising a power consumption characteristic extraction module, a power consumption dynamic distribution module, a scanning strategy optimization module, a time sequence control reconstruction module and a drive signal conversion module; the power consumption characteristic extraction module is used for continuously collecting real-time power consumption parameters of each area of the display panel and establishing an area power consumption characteristic map according to the analysis result of the display content; The power consumption dynamic allocation module analyzes the power consumption fluctuation difference of the current frame and the historical frame based on the regional power consumption characteristic map, generates a partition power consumption quota matrix by combining a preset power consumption threshold value, and synchronizes the partition power consumption quota matrix to the scanning strategy optimization module; The scanning strategy optimization module receives the partition power consumption quota matrix, dynamically adjusts the row scanning sequence and the column scanning frequency according to the power consumption quota weight of each region, generates an adaptive scanning strategy table and transmits the adaptive scanning strategy table to the time sequence control reconstruction module; The time sequence control reconstruction module analyzes scanning time sequence parameters in the self-adaptive scanning strategy table, reconstructs the time sequence logic relation between the vertical synchronous signal and the horizontal synchronous signal and outputs dynamic time sequence control waveforms to the driving signal conversion module; the driving signal conversion module generates a gray voltage control signal and a grid electrode starting voltage signal according to the dynamic time sequence control waveform conversion, and simultaneously feeds back actual driving power consumption data to the power consumption characteristic extraction module.
  2. 2. The low power consumption demand oriented liquid crystal display drive circuit dynamic adjustment system of claim 1, wherein the power consumption feature extraction module comprises: collecting brightness values of three primary colors of red, green and blue and refresh rate parameters of each pixel unit of a display panel, and mapping to generate a pixel-level power consumption distribution thermodynamic diagram; dividing the display panel into M multiplied by N power consumption monitoring blocks, and counting the brightness average value and refresh rate change frequency of each block; and calculating real-time power consumption coefficients of the blocks according to the brightness average value and the refresh rate change frequency of each block, and integrating to form a regional power consumption characteristic map.
  3. 3. The low power consumption demand oriented lcd driver circuit dynamic adjustment system of claim 2, wherein the power consumption dynamic allocation module performs the following operations: extracting block power consumption coefficients of continuous K frames in the regional power consumption characteristic map, and calculating power consumption fluctuation variance values of all blocks; comparing the power consumption fluctuation variance value of the block with a preset fluctuation tolerance threshold, and marking the block exceeding the threshold as a high fluctuation area; And adjusting a global power consumption distribution weight coefficient according to the high fluctuation area occupation ratio, and generating a partition power consumption quota matrix containing the maximum allowable power consumption value of each block by combining a preset power consumption threshold.
  4. 4. The low power consumption requirement oriented dynamic adjustment system of a liquid crystal display driving circuit according to claim 1, wherein the scan strategy optimization module is specifically implemented as: Analyzing the power consumption quota weight of each block in the partition power consumption quota matrix, and classifying the blocks with weights lower than a set value into low-priority areas; A line scanning merging strategy is adopted for the low-priority area, and three adjacent line scanning signals are merged into a single scanning operation; and dynamically reducing the column scanning frequency of the high-weight region according to the block power consumption quota weight, and generating an adaptive scanning strategy table containing row merging identifiers and column frequency adjustment parameters.
  5. 5. The low power consumption demand oriented lcd driving circuit dynamic adjustment system of claim 4, wherein the timing control reconstruction module comprises: Reading a row merging identifier in the self-adaptive scanning strategy table, and recalculating the effective pulse width of the vertical synchronous signal; Analyzing the column frequency adjustment parameters, and reconstructing rising edge triggering intervals of the horizontal synchronous signals; and generating a dynamic time sequence control waveform containing a variable blanking period according to the reconstructed vertical synchronous signal and horizontal synchronous signal.
  6. 6. The low power consumption demand oriented lcd driving circuit dynamic adjustment system of claim 5, wherein the driving signal conversion module comprises: receiving a blanking period parameter in a dynamic time sequence control waveform, and closing gray voltage output of an inactive region in the blanking period; Dynamically adjusting the duration of the gate turn-on voltage according to the horizontal synchronization trigger interval of the dynamic timing control waveform; And the driving current value of each block is monitored in real time and converted into actual driving power consumption data which are fed back to the power consumption characteristic extraction module.
  7. 7. The low power consumption demand oriented lcd driver circuit dynamic adjustment system of claim 1, further comprising a power consumption threshold adaptation module: Receiving an area power consumption characteristic map output by a power consumption characteristic extraction module, and extracting the difference value between full-screen average power consumption and peak power consumption; When the peak power consumption difference exceeds a preset warning value, dynamically improving a preset power consumption threshold according to historical power consumption data; and when the average power consumption of the continuous multi-frame full screen is lower than the set threshold value, the preset power consumption threshold value is decreased according to the preset step value.
  8. 8. The low power consumption demand oriented liquid crystal display drive circuit dynamic adjustment system of claim 7, wherein the power consumption threshold adaptation module further comprises: establishing an association channel of the ambient light intensity sensor and the display content complexity detection unit; Adjusting a reference value of a preset power consumption threshold according to the ambient light intensity variation; and correcting the floating range of the preset power consumption threshold according to the image edge density parameter output by the display content complexity detection unit.
  9. 9. The dynamic adjustment system for low power consumption demand oriented lcd driving circuit according to claim 1, wherein the driving signal conversion module is provided with a signal spectrum analysis unit: collecting frequency distribution characteristics of gray voltage control signals, and extracting main harmonic component energy values; when the energy value of the main harmonic component exceeds a set threshold, sending a waveform smoothing request to a time sequence control reconstruction module; The timing control reconstruction module increases the rising edge buffer time of the horizontal synchronous signal after responding to the request.
  10. 10. The low power consumption demand oriented lcd driving circuit dynamic adjustment system of claim 9, wherein the signal spectrum analysis unit performs the following operations: dividing a plurality of continuous time domain sampling windows at equal intervals in a complete period of the vertical synchronous signal; capturing actual waveforms of the gray voltage control signals in each time domain sampling window through a high-speed analog-to-digital converter; performing fast Fourier transform operation on the captured actual waveform of each time domain sampling window, and extracting corresponding spectrum distribution characteristic data; Comparing the extracted spectrum distribution characteristic data with a pre-stored reference energy distribution template, and identifying abnormal frequency points with spectrum energy obviously higher than the reference energy; Marking a time domain sampling window containing abnormal frequency points as an electromagnetic interference window, and recording the starting position and the ending position of the time domain sampling window in the whole vertical synchronization period; Summarizing the position information of all marked electromagnetic interference windows to generate an electromagnetic interference window position information table; Transmitting the electromagnetic interference window position information table to the scanning strategy optimization module in real time; After receiving the electromagnetic interference window position information table, the scanning strategy optimization module skips the line scanning operation of the corresponding display area according to the position marked by the electromagnetic interference window position information table when the self-adaptive scanning strategy table is generated.

Description

Liquid crystal display driving circuit dynamic regulating system facing low power consumption requirement Technical Field The invention relates to the technical field of liquid crystal display driving, in particular to a dynamic regulating system of a liquid crystal display driving circuit facing to low power consumption requirements. Background With the rapid popularization of portable electronic products such as mobile terminals and wearable devices, low power consumption has become one of the core requirements of liquid crystal display design. The conventional lcd driving circuit mostly adopts a fixed scanning strategy and a timing control manner, and the driving circuit always operates at a constant frequency and voltage regardless of the display content, which causes unnecessary power consumption to a great extent. In practical applications, the display contents of the liquid crystal display often have significant regional differences. For example, when displaying static text, the pixels of most regions are in a stable state, and only a small part of regions have dynamic changes, and when playing video, the motion amplitude and color changes of different picture regions are different. However, the existing driving circuit cannot perform targeted power consumption adjustment according to the differences of the areas, so that the high power consumption area and the low power consumption area adopt the same driving parameters, and energy is wasted. The conventional power consumption control method is mainly focused on the adjustment of the whole voltage or frequency, and the fine management of each area of the display panel is lacking. When the display content is changed locally, the driving circuit still needs to scan and drive the whole panel in a whole area, so that not only is the invalid power consumption expenditure increased, but also the stability of the display effect is possibly influenced due to the adjustment of the whole parameters. In addition, the time sequence control logic of the traditional driving circuit is relatively fixed, and dynamic adaptation is difficult to carry out according to real-time power consumption characteristics, so that the flexibility and response speed of power consumption adjustment are limited, and the dual requirements of low power consumption and display performance in different scenes can not be met. Disclosure of Invention The present invention is directed to a dynamic adjustment system for a driving circuit of a liquid crystal display for low power consumption, so as to solve the above-mentioned problems in the prior art. In order to achieve the above object, the present invention provides a dynamic adjustment system for a driving circuit of a liquid crystal display facing to low power consumption, the system comprising: The device comprises a power consumption characteristic extraction module, a power consumption dynamic allocation module, a scanning strategy optimization module, a time sequence control reconstruction module and a driving signal conversion module; the power consumption characteristic extraction module is used for continuously collecting real-time power consumption parameters of each area of the display panel and establishing an area power consumption characteristic map according to the analysis result of the display content; The power consumption dynamic allocation module analyzes the power consumption fluctuation difference of the current frame and the historical frame based on the regional power consumption characteristic map, generates a partition power consumption quota matrix by combining a preset power consumption threshold value, and synchronizes the partition power consumption quota matrix to the scanning strategy optimization module; The scanning strategy optimization module receives the partition power consumption quota matrix, dynamically adjusts the row scanning sequence and the column scanning frequency according to the power consumption quota weight of each region, generates an adaptive scanning strategy table and transmits the adaptive scanning strategy table to the time sequence control reconstruction module; The time sequence control reconstruction module analyzes scanning time sequence parameters in the self-adaptive scanning strategy table, reconstructs the time sequence logic relation between the vertical synchronous signal and the horizontal synchronous signal and outputs dynamic time sequence control waveforms to the driving signal conversion module; the driving signal conversion module generates a gray voltage control signal and a grid electrode starting voltage signal according to the dynamic time sequence control waveform conversion, and simultaneously feeds back actual driving power consumption data to the power consumption characteristic extraction module. Preferably, the power consumption feature extraction module includes: collecting brightness values of three primary colors of red, green and blue and refresh rat