35results about How to "Avoid Brightness Differences" patented technology

In one embodiment of the present invention, a display device is disclosed wherein if a frame luminance is less than a maximum value, the device creates a difference between luminance outputs in the two subframes and sets the luminance difference to a value less than a sub-maximum luminance which is a maximum luminance output in one subframe. With the arrangement, no complete switching of the subframes in which luminance outputs are made occurs at a grayscale level where low luminance replaces high luminance or vice versa. Thus, the grayscale level-luminance curve continues smoothly.

A flat panel display device formed in a pentile structure is provided, which includes a pixel portion and a lighting tester. The pixel portion includes a first pixel column, a second pixel column and a third pixel column. In the first pixel column, first pixels for displaying a first color and second pixels for displaying a second color are alternately arranged in a direction the data lines. In the second pixel column, first and second pixels arranged in reverse order of the first pixel column in a direction parallel to the data lines. In the third pixel column, third pixels for displaying a third color are arranged in a direction parallel to the data lines. The lighting tester applies a first voltage to the first pixel column and applies a second voltage to the second pixel column during a first time period. The lighting tester applies the second voltage to the first pixel column and applies the first voltage to the second pixel column during a second time period.

A pulse width modulation (PWM) dimming control method and a display apparatus having a PWM dimming control function are provided. The method includes setting a PWM period of a group lighting block based on a state of both a first gate line and a last gate line among a plurality of gate lines corresponding to the group lighting block; and controlling PWM dimming of the group lighting block based on the set PWM period. The display apparatus includes a timing controller which determines a pulse width modulation (PWM) period of a group lighting block based on a state of both a first gate line and a last gate line among a plurality of gate lines corresponding to the group lighting block; and a PWM dimming controller which generates a PWM signal for controlling PWM dimming based on the determined PWM period.

The embodiment of the invention discloses the driving method of a display panel and a computer readable storage medium. The display panel comprises a plurality of sub-pixels arranged in an array mode,a plurality of data input ports and multiple groups of data lines. Each group of the multiple groups of data lines comprises a plurality of data lines coupled to the same data input port through a plurality of selection switches. Each data line in the plurality of data lines is coupled to a corresponding column of sub-pixels. The driving method comprises the following steps of scanning a Mth rowof sub-pixels, and according to a first sequence, starting the plurality of selection switches; and scanning a M+1th row of sub-pixels, and according to a second sequence, starting the plurality of selection switches, wherein the M is a positive integer which is greater than or equal to 1, and the first sequence and the second sequence are different. In an existing display panel, the brightness ofthe same color sub-pixels is different due to the different charging of the plurality of the same color sub-pixels, and horizontal and vertical stripes appear on the display panel. In the embodimentof the invention, the above problems are solved.

A data modulation method comprises, comparing left eye image data during a (4N+1)-th frame period with previous frame data, selecting a preliminary modulation value for a left eye image, preliminarily modulating the left eye image data during the (4N+1)-th frame period to reach the preliminary modulation value for the left eye image, and secondarily modulating left eye image data during a (4N+2)-th frame period to reach the preliminary modulation value for the left eye image or a modulation value smaller than the preliminary modulation value.

A thin film transistor panel includes an insulating substrate including a display area and a peripheral area. A plurality of pixels is defined by a plurality of data lines that cross a plurality of gate lines. A pixel electrode is formed in each of the pixels. A plurality of dummy pixels is defined by a dummy data line that crosses the plurality of gate lines. A dummy pixel electrode is formed in each of the dummy pixels, and a thin film transistor including a gate electrode, a source electrode, a drain electrode, and a semiconductor. The thin film transistor display panel reduces or prevents a difference in brightness between pixels caused by a difference of coupling capacitance between the data line adjacent to the peripheral area and the other data lines.

The invention discloses a brightness equalization method and apparatus for a vehicle-mounted surround view system. The method includes the steps of determining, according to magnitudes of brightness changes of historical images taken by a plurality of cameras, a current image taken by one camera as a first reference image; determining a current image captured by a camera located on the opposite side of the camera photographing the first reference image as a second reference image; determining, for an adjacent image located at the same side of the first reference image and the second reference image and taken currently by another camera, a brightness correction value of the adjacent image according to a first brightness difference and a second brightness difference of the adjacent image; and correcting the pixel brightness of the adjacent image according to the determined brightness correction value. The method of the invention can ensure the brightness consistency of a spliced image, make a fusion transition area more natural, and cause no occurrence of an obvious change of brightness to the whole spliced image, thereby facilitating the observation by a user and improving the user experience.

The invention provides an image processing method and device and a computer readable storage medium, which are used for inhibiting the black and white edge phenomenon in a fused image, so that the overall presentation effect of the image is more natural. The method comprises the following steps: respectively carrying out multi-scale decomposition on a visible light image and an infrared image to obtain a multi-scale decomposition result; for each pixel point position, determining whether the pixel point position is in a feature region or not according to the multi-scale decomposition result; if yes, correcting the infrared high-frequency information corresponding to the position of the pixel point according to the multi-scale decomposition result; and after correcting the infrared high-frequency information corresponding to all the pixel positions in the feature region, performing coefficient fusion and multi-scale reconstruction processing on the infrared image and the visible light image to obtain a fused image without a black-white edge phenomenon.

A method for modifying color density values in a dot-based printing system uses a control unit. The control unit implements the modification of the color density values after a raster image has been created and modifies the number and/or size of print dots to be applied to a printing substrate in order to attain pre-defined color density target values.

The invention provides a display panel, a brightness compensation method and a display device. The display panel comprises an array substrate, a light-emitting layer, a plurality of optical film layers and a photoelectric sensor. The light-emitting layer is located on one side of the array substrate, the array substrate is used for driving the light-emitting layer to emit light, the optical film layers are located on the side, away from the array substrate, of the light-emitting layer, and light emitted by the light-emitting layer forms waveguide light on the array substrate and/or the optical film layers. The photoelectric sensor is used for obtaining the waveguide light so as to perform brightness compensation on light emitted by the light-emitting layer according to data of the waveguide light. According to the display panel provided by the invention, the waveguide light formed by the light emitted by the light-emitting layer on the array substrate or the optical film layers can be obtained through the arrangement of the photoelectric sensor so that the brightness compensation can be performed on the light emitted by the corresponding light-emitting layer according to the brightness of the waveguide light, and the brightness uniformity of the display panel is ensured; and the visual experience of the display panel is improved.

A liquid crystal display includes a first substrate including pixels, a gate line disposed on the first substrate, data lines disposed on the first substrate, a first reference voltage line and a second reference voltage line respectively disposed on the first substrate and applying a first reference voltage and a second reference voltage having different polarities from each other, a pixel electrode disposed in one pixel area and including a first subpixel electrode and a second subpixel electrode, where a first pixel column may overlap the first reference voltage line and the second reference voltage line, a second pixel column adjacent to the first pixel column may not overlap the first reference voltage line and the second reference voltage line, and a first width of the pixel electrode of the first pixel column may be different from a second width of the pixel electrode of the second pixel column.

In order to solve the problem that a plurality of single LED lamp strip modules which are connected in series cannot be used, the invention provides a low-power-consumption LED series lamp strip. Thelamp strip is formed by connecting a plurality of lamp strip modules in series, two copper foil strip positive and negative electrodes parallel to the front face of a PCB are correspondingly arrangedon the back face of the PCB of each lamp strip module, and two wires are used for being communicated with the starting end electrodes and the tail end electrodes of the two copper foil strips parallelto the front face respectively, that is, the two copper foil strips parallel to the front face of the PCB are each connected with a wire in parallel. And the current flowing over the two parallel copper foil strips on the front surface of the PCB is shunted. The low-power-consumption LED series lamp strip has the advantages that the power loss on the copper foil of the PCB is greatly reduced, theservice life of the single lamp strip module is prolonged, and the brightness difference of the head lamp bead and the tail lamp bead due to the fact that the single lamp strip module is connected with too many lamp strips is avoided. More single LED lamp strip modules can be connected within the rated power range of the driving power supply, and the lamp strip can be connected as long as 10 meters generally.