Abstract: Provided are LED-display-screen drive chip and LED display screen, wherein the drive chip is configured such that: when a grayscale value R of a grayscale data is less than or equal to Q, the grayscale data is allocated to one display group in M display groups; and when the grayscale value R of the grayscale data is larger than Q, the grayscale value of one display group of the M display groups is P, wherein P>=Q, and a total grayscale value of remaining M?1 display groups is R?P, wherein in display groups in the remaining M?1 display groups whose grayscale value is not 0, a number of display groups whose grayscale value is less than L is not more than 1, wherein L?1, Q>L, and Q is a centralized display threshold. The present disclosure is capable of making the low-grayscale display effect smoother and improving the display effect.

Abstract: The present disclosure relates to a constant current source calibration circuit, a constant current source drive circuit, a drive chip, and an electronic device. The current calibration circuit includes a resistor and a calibration circuit connected to the resistor for adjusting a voltage drop across two ends of the resistor; and a selector or a switch connected to the two ends of the resistor, and configured to select one end of the resistor to be connected to a constant current source output channel and the corresponding other end to be supplied with a first bias voltage VD. Since the first bias voltage VD is a fixed constant, the voltage drop across the two ends of the resistor is adjusted.

Abstract: Provided are LED-display-screen drive chip and LED display screen, wherein the drive chip is configured such that: when a grayscale value R of a grayscale data is less than or equal to Q, the grayscale data is allocated to one display group in M display groups; and when the grayscale value R of the grayscale data is larger than Q, the grayscale value of one display group of the M display groups is P, wherein P>=Q, and a total grayscale value of remaining M?1 display groups is R?P, wherein in display groups in the remaining M?1 display groups whose grayscale value is not 0, a number of display groups whose grayscale value is less than L is not more than 1, wherein L?1, Q>L, and Q is a centralized display threshold. The present disclosure is capable of making the low-grayscale display effect smoother and improving the display effect.

Abstract: Provided are decoupling circuit, driving IC, and display device. The decoupling circuit includes pre-charging module and constant current driving module, an output terminal of the pre-charging module and an output terminal of the constant current driving module are connected together to serve as a channel output terminal; within one display unit, when PWM is greater than 0, operation states of the pre-charging module are pre-charging V1, pre-charging off, and pre-charging V2 in sequence, the constant current driving module is turned on based on PWM in stage of the pre-charging off, such that a lamp bead is lit, and at this time, voltage at the channel output terminal is V3; when the PWM is equal to 0, the constant current driving module is turned off, and output states of the pre-charging module are pre-charging V4, pre-charging V5, and pre-charging V6 in sequence, (V1?V3)?(V4?V5)=K1, (V2?V3)?(V6?V5)=K2, K1 and K2 are constants.

Abstract: The present disclosure relates to a drive circuit, including: a first module, generating display data based on image information; a second module, generating a display signal based on the display data and a plurality of clock signals; a third module, outputting a constant current based on the display signal; and a fourth module, configured to provide a reference current to the third module, wherein the fourth module includes: a reference voltage generation module, a bias module, a current generation module, and a pre-charging module. Any two adjacent clock signals of the plurality of clock signals differ by M complete clock cycles, where 0?M<1. This circuit can realize relatively high image display accuracy with relatively low system power consumption and chip cost, and meanwhile realize effective low grayscale compensation for image.

Abstract: The present disclosure relates to a drive circuit, including: a first module, generating display data based on image information; a second module, generating a display signal based on the display data and a plurality of clock signals; a third module, outputting a constant current based on the display signal; and a fourth module, configured to provide a reference current to the third module, wherein the fourth module includes: a reference voltage generation module, a bias module, a current generation module, and a pre-charging module. Any two adjacent clock signals of the plurality of clock signals differ by M complete clock cycles, where 0?M<1. This circuit can realize relatively high image display accuracy with relatively low system power consumption and chip cost, and meanwhile realize effective low grayscale compensation for image.

Abstract: The present disclosure relates to a constant current source calibration circuit, a constant current source drive circuit, a drive chip, and an electronic device. The current calibration circuit includes a resistor and a calibration circuit connected to the resistor for adjusting a voltage drop across two ends of the resistor; and a selector or a switch connected to the two ends of the resistor, and configured to select one end of the resistor to be connected to a constant current source output channel and the corresponding other end to be supplied with a first bias voltage VD. Since the first bias voltage VD is a fixed constant, the voltage drop across the two ends of the resistor is adjusted.

Abstract: The present disclosure relates to a display apparatus and a display control method, the display apparatus comprises: a display panel which comprises a plurality of sub display panels arranged in an array, the plurality of sub display panels are connected by a display channel to form a first topology and are also connected by an information channel according to a predetermined second topology; and a detecting device configured to obtain basic information of the display panel and determine the first topology according to the basic information and the second topology. The display apparatus and the display control method can automatically detect the topology of the plurality of sub display panels of the display panel, so that the debugging process on the display panel can be accelerated.

Abstract: The present disclosure relates to the technical field of LED display screens, and in particular, to an LED display device and a method for driving the same. The driving method includes: generating a grayscale data in accordance with an image to be displayed; generating a control signal in accordance with the grayscale data, wherein the control signal includes a plurality of subframe signals each having a duration corresponding to a respective subframe display time; and controlling the corresponding LED lamps to be turned on or off by use of the subframe signals in each subframe of the frame cycle. The frame cycle includes reset time periods separating the successive subframes from each other. The order of the plurality of subframes in the frame cycle can be adjusted by use of the grayscale data.

Abstract: An LED display device and a method for driving the same are disclosed. The LED display device includes a plurality of pixel units being coupled to the row and column lines. In each of the row periods, the method comprises: displaying a display data in a manner of packet-by-packet; and pre-charging the parasitic capacitors between the row and column line by use of a reset voltage to implement a reset between the successive groups. According to the disclosure, a reset is performed between the packets in each row period to reduce the interference to the low grayscale image by the high grayscale image, such that the dynamic display quality of the image is improved.

Abstract: The present disclosure relates to a display apparatus and a display control method, the display apparatus comprises: a display panel which comprises a plurality of sub display panels arranged in an array, the plurality of sub display panels are connected by a display channel to form a first topology and are also connected by an information channel according to a predetermined second topology; and a detecting device configured to obtain basic information of the display panel and determine the first topology according to the basic information and the second topology. The display apparatus and the display control method can automatically detect the topology of the plurality of sub display panels of the display panel, so that the debugging process on the display panel can be accelerated.

Abstract: The present disclosure relates to the technical field of LED display screens, and in particular, to an LED display device and a method for driving the same. The driving method includes: generating a grayscale data in accordance with an image to be displayed; generating a control signal in accordance with the grayscale data, wherein the control signal includes a plurality of subframe signals each having a duration corresponding to a respective subframe display time; and controlling the corresponding LED lamps to be turned on or off by use of the subframe signals in each subframe of the frame cycle. The frame cycle includes reset time periods separating the successive subframes from each other. The order of the plurality of subframes in the frame cycle can be adjusted by use of the grayscale data.

Abstract: An LED display device and a method for driving the same are disclosed. The LED display device includes a plurality of pixel units being coupled to the row and column lines. In each of the row periods, the method comprises: displaying a display data in a manner of packet-by-packet; and pre-charging the parasitic capacitors between the row and column line by use of a reset voltage to implement a reset between the successive groups. According to the disclosure, a reset is performed between the packets in each row period to reduce the interference to the low grayscale image by the high grayscale image, such that the dynamic display quality of the image is improved.

Abstract: A high-durability and long-scale-distance fiber grating sensor and a manufacturing method therefor, which relate to the technical field of fiber grating sensors. A fiber grating is disposed on the middle segment of a commercial optical fiber. A bushing, a woven fiber jacket layer, and a packaging structure are disposed on the periphery of the commercial optical fiber. The commercial optical fiber and the bushing therebetween are fixed by using fixing points in the bushing. Anchoring segments are disposed between the fixing points in the bushing and the woven fiber jacket layer. Two ends of the commercial optical fiber are sequentially connected to optical fibers on the anchoring segments and connecting optical fibers. Tail ends of the connecting optical fibers are connected to a transmission cable by using connecting flanges.

Abstract: A high-durability and long-scale-distance fiber grating sensor and a manufacturing method therefor, which relate to the technical field of fiber grating sensors. A fiber grating is disposed on the middle segment of a commercial optical fiber. A bushing, a woven fiber jacket layer, and a packaging structure are disposed on the periphery of the commercial optical fiber. The commercial optical fiber and the bushing therebetween are fixed by using fixing points in the bushing. Anchoring segments are disposed between the fixing points in the, bushing and the woven fiber jacket layer. Two ends of the commercial optical fiber are sequentially connected to optical fibers on the anchoring segments and connecting optical fibers. Tail ends of the connecting optical fibers are connected to a transmission cable by using connecting flanges.

Abstract: A high-durability and long-scale-distance fiber grating sensor and a manufacturing method therefor, which relate to the technical field of fiber grating sensors. A fiber grating is disposed on the middle segment of a commercial optical fiber. A bushing, a woven fiber jacket layer, and a packaging structure are disposed on the periphery of the commercial optical fiber. The commercial optical fiber and the bushing therebetween are fixed by using fixing points in the bushing. Anchoring segments are disposed between the fixing points in the, bushing and the woven fiber jacket layer. Two ends of the commercial optical fiber are sequentially connected to optical fibers on the anchoring segments and connecting optical fibers. Tail ends of the connecting optical fibers are connected to a transmission cable by using connecting flanges.