44results about How to "Increase the number of gray levels" patented technology

The invention discloses a silicon-based display adopting digital-analog hybrid drive. Pixels are driven to emit light through the method of combining the simulation amplitude modulation drive strategy and a digital pulse width modulation drive strategy, wherein the luminance of the pixels is determined by output current or voltage amplitude of the pixels in the subframe and the duty ratio of time of the output current or voltage of the pixels in the subframe, the frame of image is divided into a plurality of different digital subframes and simulation subframes, the digital drive strategy is adopted for the digital subframes, the time proportionable drive mode or luminance proportionable drive mode is adopted, the simulation drive strategy is adopted for the simulation subframes, many digital-analog converters with few digits are adopted, input data is converted into amplitude quantity of voltage or current, so that the pixels emit light, and the simulation subframes and the digital subframes are combined to generate the final display frame. The requirements of the simulation amplitude modulation drive strategy for the digital-analog converter and the requirements of the pixel circuit for the precision of analog quantity are reduced, and the conversion speed of the digital-analog converter and the contrast of the pixel luminance are improved.

An image pick-up device includes: a photoelectric converter (5) which converts light into electric charge; an accumulation capacitor (6) which accumulates charge converted by the photoelectric conversion element(s); reset means (7) for discharging electric charge from the accumulation capacitor (6); and an amplification thin film transistor (8) which receives and amplifies electric charge accumulated in the accumulation capacitor (6) and outputs the amplified charge. The amplification thin film transistor (8) forms a source follower circuit.

The invention provides a multi-gray-scale pixel driving circuit and a display panel. According to the multi-gray-scale pixel driving circuit, a driving module, a light emitting module and a light-emitting control module are connected in series between a first potential and a second potential; the driving module and the light-emitting control module are used for controlling the light-emitting situation of the light-emitting module according to the preset time sequence, so that the light-emitting module can achieve multi-gray-scale display of low gray scale or high gray scale, and the gray scalenumber capable of being displayed is greatly increased. When the multi-gray-scale pixel driving circuit is applied to the display panel, the display of more gray scales can be realized.

The invention discloses a sub-pixel circuit, an active electroluminescent display and a driving method thereof. The sub-pixel circuit comprises at least one electroluminescent device, a first drivingtransistor or a second driving transistor and a third driving transistor, wherein the first driving transistor or the second driving transistor and the third driving transistor are connected with theelectroluminescent device; the cathode of the electroluminescent device is connected with electricity, the anode of the electroluminescent device is connected with the output end of the first drivingtransistor, the input end of the first driving transistor is connected with a signal line, the control end of the first driving transistor is connected with a scanning line; or the anode of the electroluminescent device is connected with the output end of the second driving transistor; the input end of the second driving transistor is connected with the output end of the third driving transistor;the input end of the third driving transistor is connected with electricity, the control end of the second driving transistor is connected with the scanning line, the control end of the third drivingtransistor is connected with the signal line, and resolution is improved by reducing loads on the scanning line and the signal line and changing the number of the signal lines.

An image processing method includes the steps of detecting the dynamic range of input image data, performing edge enhancement processing to increase the number of grayscale levels of the input image data, and performing dithering processing to reduce the number of grayscale levels of each pixel of the input image data. The number of pseudo grayscale levels is determined based on a parameter indicating the level of the dynamic range and a parameter indicating the level of the edge enhancement processing.

The invention provides a display panel. The display panel comprises a backlight module and a display screen body, the backlight module comprises a central control panel, a control module, a first driving module, a second driving module and a plurality of light emitting diodes. The control module comprises a first control unit and a second control unit which are electrically connected with the central control board, the first driving module is electrically connected with the first control unit, and the second driving module is electrically connected with the second control unit; the display screen body comprises a first split body and a second split body, the light emitting diode corresponding to the first split body is electrically connected with the first driving module, and the light emitting diode corresponding to the second split body is electrically connected with the second driving module. At least two control modules are simultaneously mounted on one central control board, and more driving modules are controlled through more control modules, so that the number of backlight partitions is increased on the premise that the central control board is not increased.

The invention relates to the field of image processing technology, in particular relates to a mixed gray modulation high-gray-level and high-definition image displaying method and device, which solve the technical problems of unreasonable design and the like in the prior art. The method comprises the steps of: A, data pre-processing and storing; B, dithering; C, data partitioning and hybrid modulating; and D, output displaying. Compared with the prior art, the mixed gray modulation high-gray-level and high-definition image displaying method and device have the advantages that the design is reasonable, the realization is easy, the strengths of various modulation methods are developed, the weaknesses of various modulation methods are avoided, and the advantages of various modulation methods are fully utilized to improve the gray level of the display screen and realize the high-definition display of the image.

An image processing method includes the steps of detecting the dynamic range of input image data, performing edge enhancement processing to increase the number of grayscale levels of the input image data, and performing dithering processing to reduce the number of grayscale levels of each pixel of the input image data. The number of pseudo grayscale levels is determined based on a parameter indicating the level of the dynamic range and a parameter indicating the level of the edge enhancement processing.

The invention provides a display driving circuit and a display device. The display driving circuit comprises a plurality of groups of data signal lines, and each group of data signal lines comprises Ndata signal lines; a plurality of gate scan lines; multiple pixel driving units, wherein each pixel driving unit comprises N first MOS tubes and N second MOS tubes, the N first MOS tubes correspond to the N second MOS tubes in a one-to-one mode, the input ends of the N first MOS tubes are connected with driving voltage, and the output ends of the N first MOS tubes are connected and used for outputting driving current to the corresponding LED light-emitting units. Gates of the N first MOS tubes are connected with output ends of the N second MOS tubes in a one-to-one correspondence manner, input ends of the N first MOS tubes are connected with the N data signal lines in the same group in a one-to-one correspondence manner, and gates of the N first MOS tubes are connected with a gate scanning line. The gray scale number of the display device can be increased, the gray scale control sensitivity can be improved, and the display quality can be improved.

The invention belongs to the technical field of infrared image processing, and particularly discloses an infrared image optimization processing method based on spatial domain hybrid operation, which comprises the following steps: (1) compressing and mapping a large dynamic infrared image Iwdr to an 8-bit grayscale image Igrey by using a detail-enhanced dynamic range compression method; (2) performing smooth filtering on the Igrey to calculate a basic image Ibs; (3) extracting an image detail Idt from the difference between the Igrey and the Ibs; (4) calculating an image depth factor depth forIgrey edge detection; (5) calculating a detail enhanced image Idt _ enh according to the image detail Idt, the image depth factor depth, the image detail gain Gdt and the grayscale image Igrey; (6) fusing the detail enhanced image Idt _ enh and the Igrey according to an enhancement scale factor Renh to output a fused image Ifuse; and (7) performing edge-preserving and noise-filtering processing onthe fused image Ifuse, and outputting an optimized image Iopt. According to the method, the main interval gray scale number can be increased, the transition interval gray scale number is reduced, noise is suppressed, details can be enhanced, and image contrast and definition are improved.

The disclosure provides a driving method for an active matrix type bistable chiral nematic liquid crystal display, including: dividing a frame into at least two fields, wherein each field is formed by a plurality of pixel rows; driving one of the at least two fields by a plurality of driving operations, wherein a liquid crystal unit of each pixel in the field is driven to one of two predetermined states in each driving operation; and driving the other fields by the plurality of driving operations.

The present invention relates to the technical field of image processing, and in particular discloses a dynamic range compression method for infrared image detail enhancement, which includes the following steps: counting the histogram of the AD value of the input infrared image; finding the maximum AD value whose number of pixels in the histogram is greater than 0 x max with minimum AD value X min ; Calculate the mapped minimum AD value X s0 ; Calculate the mapped maximum AD value X s5 ; Find [X in the histogram s0 , X s5 ] The AD value X with the largest number of pixels in the interval p1 ;(6) from X p1 to x s0 Search for the AD value X of the lower boundary of the main area 1 s1 ; from X p1 to x s5 Search the upper boundary AD value X of the main area 1 s2 ; Find [X in the histogram s2 , X s5 ] The number of pixels in the interval is at most AD value X p2 ; from X p2 to x s2 Search for the AD value X of the lower boundary of the main area 2 s3 ; from X p2 to x s5 Search the upper boundary AD value X of the main area 2 s4 ;Calculate the number of ADs in the main area and the number of ADs in the transition area; calculate the number of gray levels mapped in the transition area; calculate the number of gray levels mapped in the main area 1; calculate the number of gray levels mapped in the main area 1; calculate the corresponding gray levels of the corresponding AD values; input The AD value of the infrared image is mapped to [Y s0 , Y s5 ] range gray value and display it on the display device.

The invention discloses a sub-pixel circuit, an active electroluminescence display and a driving method thereof. The sub-pixel circuit includes at least one electroluminescence device and a first drive transistor or a second drive transistor connected to the electroluminescence device. and the third driving transistor; the cathode of the electroluminescent device is connected to electricity, the anode of the electroluminescent device is connected to the output terminal of the first driving transistor, and the input terminal of the first driving transistor is connected to the signal line, so The control end of the first drive transistor is connected to the scan line; or the anode of the electroluminescence device is connected to the output end of the second drive transistor, the input end of the second drive transistor is connected to the output end of the third drive transistor, and the third drive transistor is connected to the output end of the third drive transistor. The input end of the drive transistor is connected to electricity, the control end of the second drive transistor is connected to the scan line, and the control end of the third drive transistor is connected to the signal line. By reducing the load on the scan line and the signal line and changing the number of signal lines, the resolution is improved. Rate.

An object of the present invention is to provide a display device capable of suppressing power consumption and increasing the number of gray scales without providing scanning line driving circuits on both sides of a pixel portion. The technical gist of the present invention is as follows: a display device provided with a scanning line driving circuit, wherein the shift register constituting the scanning line driving circuit is equipped with at least 4m-level flip-flop circuits according to m (m is a natural number) scanning lines, and A signal for selecting the scan line in a former part of a scan line selection period and a signal for selecting the scan line in a later part of the one scan line selection period are output from different start pulses.

The invention discloses a silicon-based display adopting digital-analog hybrid drive. Pixels are driven to emit light through the method of combining the simulation amplitude modulation drive strategy and a digital pulse width modulation drive strategy, wherein the luminance of the pixels is determined by output current or voltage amplitude of the pixels in the subframe and the duty ratio of time of the output current or voltage of the pixels in the subframe, the frame of image is divided into a plurality of different digital subframes and simulation subframes, the digital drive strategy is adopted for the digital subframes, the time proportionable drive mode or luminance proportionable drive mode is adopted, the simulation drive strategy is adopted for the simulation subframes, many digital-analog converters with few digits are adopted, input data is converted into amplitude quantity of voltage or current, so that the pixels emit light, and the simulation subframes and the digital subframes are combined to generate the final display frame. The requirements of the simulation amplitude modulation drive strategy for the digital-analog converter and the requirements of the pixel circuit for the precision of analog quantity are reduced, and the conversion speed of the digital-analog converter and the contrast of the pixel luminance are improved.