Dynamic control system and method of operation thereof
By adjusting the operating frequency and timing of the compensation module and gain module through a dynamic control system, the problem of increased power consumption during high-frequency display was solved, achieving the effects of reduced power consumption and reduced flicker.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- RAYDIUM SEMICON
- Filing Date
- 2023-05-22
- Publication Date
- 2026-06-23
AI Technical Summary
Existing brightness unevenness compensation technology for display panel driving circuits consumes significantly more power during high-frequency displays, and urgently needs improvement.
A dynamic control system is adopted, which adjusts the operating frequency and timing of the compensation module and the gain module through the timing control module to reduce power consumption during high-frequency display, and adjusts the signal through the gain module to maintain the display effect.
It achieves the dual effects of reduced power consumption and reduced flicker in high-frequency displays while maintaining display quality.
Smart Images
Figure CN117133218B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to displays, and more particularly to a dynamic control system for display driving circuits and its operation method. Background Technology
[0002] In the field of display panel driving circuits, de-luminance compensation technology has been continuously developed and its functions have become more complete, but the cost is that the required area and power consumption have also increased relatively.
[0003] For example, such as Figure 1 As shown, since the number of times the compensation module IP executes per second is proportional to the display frequency, that is, the power consumption increases proportionally to the display frequency. This results in a significant increase in power consumption at high frequencies (e.g., 120Hz) compared to low frequencies (e.g., 60Hz), which urgently needs further improvement. Summary of the Invention
[0004] Therefore, this invention proposes a dynamic control system and its operation method to effectively solve the above-mentioned problems encountered by the prior art.
[0005] A preferred embodiment of the present invention provides a dynamic control system. In this embodiment, the dynamic control system includes a timing control module, a compensation module, and a gain module. The timing control module provides timing control signals according to the operating frequency of the display device. The compensation module is coupled to the timing control module and receives the input signal and the timing control signal respectively, and performs specific compensation on the input signal according to the timing control signal in a specific timing sequence before outputting a compensated signal. The gain module is coupled to both the compensation module and the timing control module and receives the compensated signal and the timing control signal respectively, and performs gain on the compensated signal according to the timing control signal in a specific timing sequence before generating an output signal.
[0006] In one embodiment, the specific compensation performed by the compensation module on the input signal is de-Mura compensation or deburn-in compensation related to panel characteristics.
[0007] In one embodiment, the input signal includes (M+N) frames. When the operating frequency of the display device increases, the compensation module and the gain module execute at the Nth frame and stop at the Mth frame according to a specific timing sequence to reduce power consumption. M and N are both positive integers.
[0008] In one embodiment, the base setting value of the gain module is Gain, and ((N+M) / N)*(1-50%)≤Gain≤((N+M) / N)*(1+50%), so that the output signal approaches the input signal.
[0009] In one embodiment, when the compensation module includes multiple compensation units, the timing control module independently controls one or more of the multiple compensation units to reduce the panel flicker effect.
[0010] In one embodiment, the first compensation unit and the second compensation unit in the plurality of compensation units perform compensation in the same timing sequence to increase the power consumption reduction.
[0011] In one embodiment, the first compensation unit and the second compensation unit of the plurality of compensation units perform compensation in different timing sequences to reduce the modulation depth.
[0012] In one embodiment, the plurality of compensation units includes a first compensation unit and a second compensation unit. The first compensation unit is executed at each frame, while the second compensation unit is executed at one frame and stops at the next frame.
[0013] In one embodiment, the gain module is a native gain unit within a polynomial, multiplier, bit shifter, or compensation module.
[0014] Another preferred embodiment of the present invention is a method for operating a dynamic control system. The dynamic control system includes a timing control module, a compensation module, and a gain module. The method for operating the dynamic control system includes: (a) the timing control module providing a timing control signal according to the operating frequency of the display device; (b) the compensation module performing specific compensation on the input signal according to the timing control signal in a specific timing sequence and then outputting a compensated signal; and (c) the gain module performing gain on the compensated signal according to the timing control signal in a specific timing sequence and then generating an output signal.
[0015] In one embodiment, the specific compensation performed by the compensation module on the input signal is brightness unevenness compensation or burn-in removal compensation related to panel characteristics.
[0016] In one embodiment, the input signal includes (M+N) frames. When the operating frequency of the display device increases, the compensation module and the gain module execute at the Nth frame and stop at the Mth frame according to a specific timing sequence to reduce power consumption. M and N are both positive integers.
[0017] In one embodiment, the base setting value of the gain module is Gain, and ((N+M) / N)*(1-50%)≤Gain≤((N+M) / N)*(1+50%), so that the output signal approaches the input signal.
[0018] In one embodiment, when the compensation module includes multiple compensation units, the timing control module independently controls one or more of the multiple compensation units to reduce the panel flicker effect.
[0019] In one embodiment, the first compensation unit and the second compensation unit in the plurality of compensation units perform compensation in the same timing sequence to increase the power consumption reduction.
[0020] In one embodiment, the first compensation unit and the second compensation unit of the plurality of compensation units perform compensation in different timing sequences to reduce the modulation depth.
[0021] In one embodiment, the plurality of compensation units includes a first compensation unit and a second compensation unit. The first compensation unit is executed at each frame, while the second compensation unit is executed at one frame and stops at the next frame.
[0022] Compared to existing technologies, the dynamic control system and its operation method of the present invention are applied to display driving circuits. When displaying at high frequencies, the timing control signal reduces the execution frequency of the compensation module to compensate the input signal in order to save power consumption. Then, the gain module applies a corresponding gain to the compensated signal so that the output signal is close to the input signal to ensure its display effect. It can also independently control one or more compensation modules to achieve the dual effects of saving power and reducing flicker in high-frequency displays. Attached Figure Description
[0023] Figure 1 This is a timing diagram showing that the number of times the compensation module is executed is proportional to the display frequency in the prior art.
[0024] Figure 2 This is a schematic diagram of a dynamic control system in a preferred embodiment of the present invention.
[0025] Figure 3 The timing diagram shows how the number of times the compensation module of the present invention is executed remains the same at different display frequencies.
[0026] Figure 4 This is a schematic diagram of the numerical simulation results of the basic setting value Gain of the gain module obtained by the present invention based on a specific timing sequence of shooting one frame and stopping one frame.
[0027] Figure 5 This is a timing diagram of the dynamic control system of the present invention executing only the compensation module.
[0028] Figure 6 This is a timing diagram of the dynamic control system of the present invention simultaneously executing the gain module and the compensation module.
[0029] Figure 7 This is a timing diagram showing that the first compensation unit and the second compensation unit of the compensation module of the present invention perform compensation in each frame of the screen in the same specific timing sequence.
[0030] Figure 8 For the purpose of implementing this invention as follows Figure 7The timing diagram shown illustrates the compensation result of increased power consumption reduction after the same timing compensation.
[0031] Figure 9 This is a timing diagram showing that the first compensation unit and the second compensation unit of the compensation module of the present invention perform compensation in the same frame with the same specific timing, and do not perform compensation in the next frame.
[0032] Figure 10 For the purpose of implementing this invention as follows Figure 9 The timing diagram shown illustrates the compensation result of increased power consumption reduction after the same timing compensation.
[0033] Figure 11 This is a timing diagram showing that the first compensation unit and the second compensation unit of the compensation module of the present invention perform compensation in different specific timing sequences.
[0034] Figure 12 For the purpose of implementing this invention as follows Figure 11 The timing diagrams show the compensation results of reduced modulation depth after different timing compensations.
[0035] Figure 13 This is a flowchart of a dynamic control system operation method in another preferred embodiment of the present invention.
[0036] Explanation of key component symbols:
[0037] F1~F5…First frame~Fifth frame
[0038] DS…Dynamic Control System
[0039] TM…Timing Control Module
[0040] IP…compensation module
[0041] GM… Gain Module
[0042] OF…operating frequency
[0043] SIN…input signal
[0044] STC…Timing Control Signal
[0045] SCP…compensated signal
[0046] SOUT… Output signal
[0047] DMR…De-luminance unevenness compensation
[0048] IP1…First Compensation Module
[0049] IP2…Second Compensation Module
[0050] GL…grayscale value
[0051] +5… Grayscale compensation value
[0052] +2… Grayscale compensation value
[0053] +7… Grayscale compensation value
[0054] +10… Grayscale compensation value
[0055] +4… Grayscale compensation value
[0056] +9… Grayscale compensation value
[0057] P1…First grayscale compensation amount
[0058] P2…Second grayscale compensation amount
[0059] Steps S10~S30… Detailed Implementation
[0060] A preferred embodiment of the present invention is a dynamic control system. In this embodiment, the dynamic control system can be applied to the display driving circuit of a display device to achieve both power saving and flicker reduction in high-frequency display, but is not limited thereto.
[0061] Please refer to Figure 2 , Figure 2 This is a schematic diagram of the dynamic control system in this embodiment. For example... Figure 2 As shown, the dynamic control system DS includes a timing control module TM, a compensation module IP, and a gain module GM. The timing control module TM is coupled to both the compensation module IP and the gain module GM. The compensation module IP is coupled to the gain module GM. The timing control module TM receives the operating frequency OF of the display device and provides a timing control signal STC to the compensation module IP and the gain module GM based on the operating frequency OF. The compensation module IP receives the input signal SIN and the timing control signal STC, performs specific compensation on the input signal SIN according to the timing control signal STC at a specific timing, and outputs a compensated signal SCP to the gain module GM. The gain module GM receives the compensated signal SCP and the timing control signal STC, and amplifies the compensated signal SCP according to the timing control signal STC at a specific timing to generate an output signal SOUT.
[0062] In practical applications, the specific compensation performed by the compensation module IP on the input signal SIN can be de-muzzle compensation or deburn-in compensation related to the panel characteristics of the display device, but is not limited thereto. Furthermore, the gain module GM can be a polynomial, a multiplier, a bit shifter, or a native gain unit within the compensation module IP, but is not limited thereto.
[0063] In one embodiment, the input signal SIN may include (M+N) frames, where M and N are both positive integers. When the operating frequency OF of the display device increases, the compensation module IP and the gain module GM can execute at the N-frame frame and not execute at the M-frame frame according to the timing control signal STC with a specific timing sequence of starting N frames and stopping M frames, thereby reducing power consumption.
[0064] In other words, when the display device operates at a high frequency, the timing control of N frames and M frames can be used to prevent the M frames in the (M+N) frame frame from performing de-luminance unevenness compensation (DMR) or de-burn-in compensation, thereby saving N / (N+M) times the power consumption.
[0065] For example, such as Figure 3 As shown, when the operating frequency (OF) of the display device increases from 60Hz to 120Hz, according to the timing control signal (STC), dimming compensation (DMR) can be performed at the first frame (F1), third frame (F3), fifth frame (F5), and seventh frame (F7) in a specific timing sequence of one frame at a time. However, DMR is not performed at the second frame (F2), fourth frame (F4), sixth frame (F6), and eighth frame (F8), thus reducing power consumption. It should be noted that performing DMR at 120Hz according to this one-frame-at-one-time timing sequence is equivalent to performing DMR over 60 frames, thus saving 0.5 times the power consumption.
[0066] Regarding the gain module GM, assume its base setting is Gain, and ((N+M) / N)*(1-50%)≤Gain≤((N+M) / N)*(1+50%), so that the output signal SOUT after gaining by the gain module GM can approximate the original input signal SIN. For example, when a specific timing sequence involves executing one frame and not executing the next frame (i.e., executing one frame and then stopping), the numerical simulation result of the base setting value Gain of the gain module GM is as follows: Figure 4 As shown.
[0067] Please refer to the following at the same time Figure 5 and Figure 6 , Figure 5 This is a timing diagram for the dynamic control system that only executes the compensation module. Figure 6 This is a timing diagram for the simultaneous execution of the gain module and the compensation module in a dynamic control system.
[0068] like Figure 5 As shown, when the dynamic control system DS only executes the compensation module IP for compensation, it executes the compensation module IP for compensation in the first frame F1, the second frame F2, the third frame F3 and the fourth frame F4 according to the timing control signal STC in a specific timing sequence that is executed in every frame, but it is not limited to this.
[0069] like Figure 6 As shown, when the dynamic control system DS executes the compensation module IP and the gain module GM simultaneously, it executes the compensation module IP and the gain module GM simultaneously in the first frame F1 and the third frame F3 according to the timing control signal STC with a specific timing of one frame start and one frame stop, while it does not execute the compensation module IP and the gain module GM in the second frame F2 and the fourth frame F4, but this is not a limitation.
[0070] In one embodiment, when the compensation module IP includes multiple compensation units, the timing control module TM can issue a timing control signal STC to independently control one or more of the multiple compensation units to reduce panel flicker effect, but is not limited thereto.
[0071] It should be noted that the multiple compensation units of the compensation module IP can perform compensation with the same or different specific timing according to the timing control signal STC, without any specific restrictions, depending on the actual needs.
[0072] In one embodiment, the first compensation unit IP1 and the second compensation unit IP2 of the compensation module IP perform compensation according to the timing control signal STC with the same specific timing to achieve the effect of increasing the power consumption reduction, but are not limited thereto.
[0073] Please refer to Figure 7 and Figure 8 , Figure 7 The timing diagram shows that the first compensation unit and the second compensation unit of the compensation module perform compensation in each frame in the same specific timing sequence; Figure 8 To execute such Figure 7 The timing diagram shown illustrates the compensation result of increased power consumption reduction after the same timing compensation.
[0074] like Figure 7 As shown, assuming the compensation module IP includes a first compensation unit IP1 and a second compensation unit IP2, and the first compensation unit IP1 and the second compensation unit IP2 perform compensation at the first frame F1, the second frame F2, the third frame F3, and the fourth frame F4 respectively, according to the same specific timing (performed in each frame), with grayscale compensation values of +5 and +2, so that the grayscale value changes from the original GL to GL+7, as shown. Figure 8 As shown, but not limited to.
[0075] Please refer to Figure 9 and Figure 10 , Figure 9 The timing diagram shows that the first compensation unit and the second compensation unit of the compensation module perform compensation in the same frame with the same specific timing sequence, and do not perform compensation in the next frame. Figure 10 To execute such Figure 9 The timing diagram shown illustrates the compensation result of increased power consumption reduction after the same timing compensation.
[0076] like Figure 9 As shown, assuming the compensation module IP includes a first compensation unit IP1 and a second compensation unit IP2, and the first compensation unit IP1 and the second compensation unit IP2 perform compensation at the first frame F1 and the third frame F3 respectively with grayscale compensation values of +10 and +4 according to the same specific timing (one frame is played and one frame is stopped), while no compensation is performed at the second frame F2 and the fourth frame F4, in order to increase the first grayscale compensation amount P1, so that the grayscale value changes from the original GL to GL+14, thereby achieving the effect of increasing the power consumption reduction. Figure 10 As shown, but not limited to.
[0077] In another embodiment, the first compensation unit IP1 and the second compensation unit IP2 of the compensation module IP perform compensation according to the timing control signal STC with different specific timing sequences to achieve the effect of reducing the modulation depth, but are not limited thereto.
[0078] Please refer to Figure 11 and Figure 12 , Figure 11 The timing diagram shows that the first compensation unit and the second compensation unit of the compensation module perform compensation in different specific timing sequences. Figure 12 To execute such Figure 11 The timing diagrams show the compensation results of reduced modulation depth after different specific timing compensations.
[0079] like Figure 11 As shown, assuming the compensation module IP includes a first compensation unit IP1 and a second compensation unit IP2, the first compensation unit IP1 performs compensation at the first frame F1, second frame F2, third frame F3, and fourth frame F4 according to a first specific timing sequence (playing every frame), with a grayscale compensation value of +5. The second compensation unit IP2 performs compensation at the first frame F1 and third frame F3 according to a second specific timing sequence (playing one frame and stopping one frame), with a grayscale compensation value of +4, but does not perform compensation at the second frame F2 and fourth frame F4, thereby increasing the second grayscale compensation amount P2, changing the grayscale value from the original GL to GL+9, thus achieving the effect of increasing power consumption reduction. Figure 12 As shown, but not limited to.
[0080] It should be noted that the specific timing in the timing control signal STC of the present invention is not limited to the timing of hitting every frame or hitting one frame and stopping one frame mentioned above. In fact, it can also be timing such as hitting one frame and stopping two frames, hitting one frame and stopping three frames, etc., to achieve different power reduction effects.
[0081] Another preferred embodiment of the present invention is a method for operating a dynamic control system. In this embodiment, the method for operating the dynamic control system can be applied to the display driving circuit of a display device, and the dynamic control system may include a timing control module, a compensation module, and a gain module, but is not limited thereto.
[0082] Please refer to Figure 13 , Figure 13 This is a flowchart of the operation method of the dynamic control system in this embodiment.
[0083] like Figure 13 As shown, the operation method of the dynamic control system includes the following steps:
[0084] Step S10: The timing control module provides timing control signals according to the operating frequency of the display device;
[0085] Step S20: The compensation module performs specific compensation on the input signal according to the timing control signal and outputs the compensated signal; and
[0086] Step S30: The gain module amplifies the compensated signal according to the timing control signal in a specific timing sequence and then generates an output signal.
[0087] It should be noted that in step S10, when the operating frequency of the display device increases, the timing control module will provide a corresponding timing control signal according to the operating frequency of the display device, but this is not limited to this. Furthermore, in step S20, the specific compensation performed by the compensation module on the input signal according to the timing control signal can be brightness unevenness compensation or burn-in removal compensation related to panel characteristics, but this is not limited to this.
[0088] In steps S20 and S30, assuming the input signal includes (M+N) frames, where M and N are both positive integers, the compensation module and the gain module will execute at the N frames and stop at the M frames according to the timing control signal in a specific timing sequence to reduce power consumption, but this is not a limitation.
[0089] In step S30, assuming the basic setting value of the gain module is Gain, then ((N+M) / N)*(1-50%)≤Gain≤((N+M) / N)*(1+50%), so that the output signal can approach the input signal, but not limited to this.
[0090] In practical applications, the compensation module may include multiple compensation units. The timing control module may issue timing control signals to independently control one or more of the multiple compensation units to reduce panel flickering effects, but this is not a limitation.
[0091] In step S20, the first compensation unit and the second compensation unit among the plurality of compensation units may perform compensation in the same or different specific timing sequence according to the timing control signal as needed, but are not limited thereto.
[0092] For example, when the first compensation unit and the second compensation unit perform compensation in different specific timing sequences, the first compensation unit can perform compensation in each frame of the image in the first specific timing sequence (shooting every frame), while the second compensation unit performs compensation in one frame of the image in the second specific timing sequence (shooting one frame and stopping one frame) and stops compensation in the next frame of the image, but this is not a limitation.
[0093] Compared to existing technologies, the dynamic control system and its operation method of the present invention are applied to display driving circuits. When displaying at high frequencies, the timing control signal reduces the execution frequency of the compensation module to compensate the input signal in order to save power consumption. Then, the gain module applies a corresponding gain to the compensated signal so that the output signal is close to the input signal to ensure its display effect. It can also independently control one or more compensation modules to achieve the dual effects of saving power and reducing flicker in high-frequency displays.
Claims
1. A dynamic control system, characterized in that, include: A timing control module for providing a timing control signal according to an operating frequency of a display device; A compensation module, coupled to the timing control module, is used to receive an input signal and the timing control signal respectively, and to perform a specific compensation on the input signal according to the timing control signal in a specific timing sequence, and then output a compensated signal; and A gain module is coupled to the compensation module and the timing control module respectively, and is used to receive the compensated signal and the timing control signal respectively, and to generate an output signal by amplifying the compensated signal according to the timing control signal and the specific timing sequence. The input signal includes (M+N) frames. When the operating frequency of the display device increases, the compensation module and the gain module execute at the N frames and stop at the M frames according to the specific timing to reduce power consumption. M and N are both positive integers.
2. The dynamic control system as described in claim 1, characterized in that, The specific compensation performed by the compensation module on the input signal is brightness unevenness compensation or burn-in removal compensation related to panel characteristics.
3. The dynamic control system as described in claim 1, characterized in that, The basic setting value of the gain module is Gain, and ((N+M) / N)*(1-50%)≤Gain≤((N+M) / N)*(1+50%), so that the output signal approaches the input signal.
4. The dynamic control system as described in claim 1, characterized in that, When the compensation module includes multiple compensation units, the timing control module independently controls one or more of the multiple compensation units to reduce panel flickering.
5. The dynamic control system as described in claim 4, characterized in that, The first compensation unit and the second compensation unit among the multiple compensation units perform compensation in the same timing sequence to increase the power consumption reduction.
6. The dynamic control system as described in claim 4, characterized in that, The first compensation unit and the second compensation unit among the multiple compensation units perform compensation in different timing sequences to reduce the modulation depth.
7. The dynamic control system as described in claim 4, characterized in that, The multiple compensation units include a first compensation unit and a second compensation unit. The first compensation unit is executed at each frame, while the second compensation unit is executed at one frame and stops at the next frame.
8. The dynamic control system as described in claim 1, characterized in that, The gain module can be a polynomial, a multiplier, a bit shifter, or a native gain unit within the compensation module.
9. A method for operating a dynamic control system, characterized in that, The dynamic control system includes a timing control module, a compensation module, and a gain module. The method includes: (a) The timing control module provides a timing control signal based on an operating frequency of a display device; (b) The compensation module performs specific compensation on an input signal according to the timing control signal at a specific timing sequence and outputs a compensated signal; and (c) The gain module amplifies the compensated signal according to the timing control signal and generates an output signal based on the specific timing. The input signal includes (M+N) frames. When the operating frequency of the display device increases, the compensation module and the gain module execute at the N frames and stop at the M frames according to the specific timing to reduce power consumption. M and N are both positive integers.
10. The method for operating a dynamic control system as described in claim 9, characterized in that, The specific compensation performed by the compensation module on the input signal is brightness unevenness compensation or burn-in removal compensation related to panel characteristics.
11. The method for operating a dynamic control system as described in claim 9, characterized in that, The basic setting value of the gain module is Gain, and ((N+M) / N)*(1-50%)≤Gain≤((N+M) / N)*(1+50%), so that the output signal approaches the input signal.
12. The method for operating a dynamic control system as described in claim 9, characterized in that, When the compensation module includes multiple compensation units, the timing control module independently controls one or more of the multiple compensation units to reduce panel flickering.
13. The method for operating a dynamic control system as described in claim 12, characterized in that, The first compensation unit and the second compensation unit among the multiple compensation units perform compensation in the same timing sequence to increase the power consumption reduction.
14. The method for operating a dynamic control system as described in claim 12, characterized in that, The first compensation unit and the second compensation unit among the multiple compensation units perform compensation in different timing sequences to reduce the modulation depth.
15. The method for operating a dynamic control system as described in claim 12, characterized in that, The multiple compensation units include a first compensation unit and a second compensation unit. The first compensation unit is executed at each frame, while the second compensation unit is executed at one frame and stops at the next frame.