171results about How to "Uniform display brightness" patented technology

An illumination apparatus comprises:

• • (a) at least one light source;
  • (b) a light guide for accepting light from the at least one light source and for guiding the light using total internal reflection, the light guide having a top surface;
  • (c) a light extracting film having an input surface optically coupled with the top surface and an output surface for providing light,
  • wherein the input surface comprises a plurality of features which are optically coupled to the top surface of the light guide, such features having:
    • (i) a first side comprising two or more planar segments; and
    • (ii) a second side comprising two or more planar segments, and
  • wherein either the length of at least some of the features is less than the width of the film or the first and second sides intersect at an apex.

The invention discloses a display panel and a driving method thereof as well as a display device. The method comprises the following steps: using a time-sequence control circuit to output a first clock control signal into a gate drive circuit and output a second clock control signal into a source drive circuit within a frame of display time; using the gate drive circuit to load gate drive signals which are synchronized with the first clock control signal on all grid lines according to the first clock control signal; using the source drive circuit to load source drive signals which are synchronized with the second clock control signal on all data lines according to the second clock control signal. The loading time of the gate drive signals and the loading time of the source drive signals are respectively and correspondingly prolonged for the time which is the same as the delay time corresponding to a group of pixel electrodes electrically connected with all the grid lines, so that the charging time of all pixels in the display panel can be enabled to be same, and thus the display brightness uniformity of the whole display panel can be guaranteed.

A method of driving an electro-wetting display panel including a pixel part is provided. In the method, data voltages are applied to the electro-wetting display panel during a first time of a frame. The frame has the first time and a second time. The first time has a plurality of horizontal periods. The data voltages are generated based on reference gamma voltages. At least one of reference gamma voltages of one of the horizontal periods is different from another of the reference gamma voltages of another of the horizontal periods. A reset voltage is applied to the electro-wetting display panel during the second time of the frame.

The invention provides a packaging structure, a flexible display substrate and a flexible display device. The packaging structure is used for packaging the flexible display substrate ad comprises a flexible packaging substrate and multiple deformation sensors which are arranged on the flexible packaging substrate. Each deformation sensor comprises a strain resistor and a lead used for connecting the strain resistor and an external signal input module and a compensation circuit. The signal input module is used for providing an input signal to the deformation sensors. When the flexible packaging substrate deforms, the resistance value of the strain resistor of the deformation position changes so that the output signal of the corresponding deformation sensor is enabled to change. The compensation circuit is used for generating a compensation signal according to the change of the output signal of the deformation sensors so as to compensate power voltage of sub-pixels corresponding to the deformation sensor of which the output signal changes, and thus the display brightness of the whole display area is enabled to be uniform.

The embodiment of the invention discloses an array substrate, a display panel, and a display device. The array substrate comprises a display area, a display signal line, a first connecting line, a second connecting line and a dummy connecting line arranged in the display area, and a driving circuit arranged in a non-display area. The display signal line and the second connecting line both extend in a second direction and are arranged in a first direction. The first connecting line extends in the first direction and is arranged in the second direction. The display signal line is electrically connected with the driving circuit through the first connecting line and the second connecting line. At least one of two ends of the second connecting line extends to the non-display area. The dummy connecting line is located in a same straight line with the first connecting line or the second connecting line. At least one of two ends of the dummy connecting line extends to the non-display area. According to the array substrate provided by the embodiment of the invention, the problem of non-uniform display caused by uneven wiring of the first connecting line or the second connecting line can beavoided, so as to improve the display effect.

The invention relates to a pixel driving circuit, a display device and a pixel driving method. The pixel driving circuit comprises a reset unit, and due to the rest unit, a storage capacitor not only stores data voltage in a charging stage, but also stores a threshold voltage of a driving unit so as to compensate the driving unit in a driving stage. The working current of the driving unit is no longer affected by the threshold voltage so as to eliminate the influence of the threshold voltage of the driving unit on the working current, so that the problem that the display brightness of a light emitting element is not uniform as the threshold voltage is inconsistent is solved, thereby improving the display quality of the display device. In addition, by moving the reset unit out of an effective display region, a row of pixel driving circuits share the reset unit, so that the aperture ratio of pixels can be greatly improved, the current density of an organic light emitting layer can be reduced and the service life of a display panel is prolonged.

This invention relates to an illumination apparatus comprising: (a) at least one light source; (b) a light guide for accepting light from the at least one light source and for guiding the light using total internal reflection, the light guide having a top surface; (c) a light redirecting film having an input surface optically coupled with the top surface and an output surface for providing redirected light, wherein the input surface comprises a plurality of light redirecting features which are optically coupled to the top surface, each light redirecting feature having: (i) a first side comprising two or more planar segments; and (ii) a second side comprising two or more planar segments, wherein the first and second sides intersect at an apex.

The invention relates to the field of display technologies, and especially to a gamma correction method and a device for an OLED display panel, and a computer-readable storage medium and electronic equipment for implementing the above method. The method includes the following processes: obtaining a gamma curve to be corrected of an OLED (organic light emitting diode) display panel; acquiring a first compensation parameter according to the gamma curve to be corrected and a standard gamma curve; and compensating an input gray scale (which is less than a first input gray scale) of the gamma curveto be corrected by using a second compensation parameter which is less than the first compensation parameter, wherein the first input gray scale is in the low gray scale. In the technical scheme provided by the invention, the compensation overflow phenomenon occurring in the related techniques is avoided by flexibly adjusting the compensation parameter. Thereby, display brightness of the OLED display panel is uniform regardless of high gray scale input or low gray scale input, which helps improve display quality of the OLED display panel and then enhances the user experience.

The invention provides a drive method of a liquid crystal display device. The drive method of the liquid crystal display device is characterized in that a first multi-path multiplexing signal, a second multi-path multiplexing signal and a third multi-path multiplexing signal control a first film transistor, a second film transistor and a third film transistor in a multi-path multiplexing module toopen at different moments successively when the m row pixel of the liquid crystal display device is driven by the method provided by the invention, compensated Gamma voltage is transmitted to sub pixels and even-row pixels connected with the first and the second film transistors as well as pixel electrodes of sub pixels connected with the third film transistor; Gamma voltage is transmitted to theodd-row pixels and the pixel electrodes of the sub pixels connected with the third film transistor, so that voltage drop generated by the pixel electrodes of the sub pixels due to the fact that the multi-path multiplexing signals are changed into low electric potential from high electric potential, and scanning lines are changed into low electric potential from high electric potential is compensated, and therefore, sub pixels are uniform in display brightness, and the liquid crystal display device is effectively prevented from flickering while displaying a picture.

The present invention provides an active matrix organic light-emitting diode display substrate and a display device. The active matrix organic light-emitting diode display substrate comprises a substrate and a plurality of pixel structures arranged in a matrix on the substrate, and further comprises a power signal structure for providing a power signal to each pixel structure, wherein the power signal structure comprises one layer of power signal electrode having a planar structure. By designing the power signal structure to include a power signal electrode having a planar structure, resistance of the power signal structure is reduced, and accordingly voltage drop of VDD decreases, thus the difference in driving voltage among organic light-emitting diodes is relatively small, and uniformity of display brightness of a display panel is ensured.

The present invention provides an AMOLED pixel driving circuit and a pixel driving method. The AMOLED pixel driving circuit utilizes a 6T2C structure, comprising a first, a second, a third, a fourth, a fifth and a sixth thin film transistors (T1, T2, T3, T4, T5, T6), a first, a second capacitors (C1, C2) and an organic light emitting diode (OLED), and the first thin film transistor (T1) is a drive thin film transistor, and the fifth thin film transistor (T5) is a switch thin film transistor, and the first capacitor (C1) is a coupling capacitor, and the second capacitor (C2) is a storage capacitor; and a first control signal (G1), a second control signal (G2) and a third control signal (G3) are involved, and the three are combined with one another and correspond to a data signal writing stage (1), a whole compensation stage (2), a discharging stage (3) and a light emitting stage (4) one after another. The threshold voltage changes of the drive thin film transistor and the organic light emitting diode can be effectively compensated to make the display brightness of the AMOLED more even and to raise the display quality.

The present invention provides an AMOLED pixel driving circuit and a pixel driving method. The AMOLED pixel driving circuit utilizes the 4T2C structure, comprising a first, a second, a third, a fourth thin film transistors (T1, T2, T3, T4), a first, a second capacitor (C1, C2) and an organic light emitting diode (OLED) with introducing a first, a second global signals (Vselx, Vsely) and a reference voltage (Vref); by providing the reference voltage (Vref) to the first node (a) via the third thin film transistor (T3), the data signal voltage (Vdata) can be simplified to diminish the complexity of the data signal voltage (Vdata). The process of writing the data signal voltage (Vdata) into the first thin film transistor T1, i.e. the driving the thin film transistor is separated from the reset stage (Reset) and the threshold voltage detection stage (Vth sensing) with the fourth thin film transistor (T4). Thus, the reset time and the compensation time can be increased to effectively compensate the threshold voltage changes of the drive thin film transistor and the display brightness of the AMOLED becomes more even to raise the display quality.

The invention provides a pixel driving circuit, a driving method, a display panel and a display device.The pixel driving circuit is used for driving a light-emitting element and comprises a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a drive transistor and a capacitor, wherein driving current provided by the light-emitting element is irrelevant to threshold voltage of the drive transistor through coordination of the transistors and the capacitor in the pixel driving circuit, so that influence on the light-emitting element is avoided, operating current of the light-emitting element is kept stable, and display brightness uniformity and good display effect of the display device are guaranteed.

The invention discloses a display panel, a driving method thereof and a display device. The display panel comprises gate lines, data lines, pixels, gate drive circuits and data drive circuits. The pixels comprise first pixels and second pixels, the first pixels and the second pixels which are arranged in the direction of the data lines form a pixel column together, and the data drive circuits comprise the first data drive circuits and the second data drive circuits. The grid driving circuit outputs a grid starting signal to the grid line to control the first pixels and the second pixels, and the farther the plurality of first pixels corresponding to the same pixel column are from the first data driving circuit, the longer the scanning time of the grid starting signal output by the grid driving circuit is. The farther the distance from the plurality of second pixels corresponding to the same pixel column to the second data driving circuit is, the longer the scanning time of the gate starting signal output by the gate driving circuit is. By prolonging the scanning time, the charging amount of the pixels is increased, data signal loss is compensated, and the display brightness of thedisplay panel is balanced.

The invention provides a backlight and a display device. The backlight comprises a back plate, light sources and light guide plates, at least two light guide plates are arranged on the same layer above the back plate together at intervals, the light sources are arranged in interval areas formed by the adjacent light guide plates, and the light emitting faces of the light sources are opposite to the first side faces, towards the interval areas, of the light guide plates. According to the backlight, two or more light guide plates are arranged, the light sources are arranged in the interval areas between the adjacent light guide plates, the far ends of the light guide plates of a large size can reach luminance needed in the display process, therefore, the overall luminance of the light guide plates is more even, and then the display luminance of a display panel of a large size is more even. In addition, compared with a direct-lighting backlight, the backlight is light, thin and lower in energy consumption.

The invention relates to a backlight module group, a light transmission uniformity detection system therefor, and an LED mixed bead matching method for the backlight module group. The method comprises the steps: detection, calculation and mixed matching. The method selects a plurality of LED chips with different luminous fluxes and/or light outgoing angles, and the plurality of LED chips are corresponding to a plurality of positions on a display screen, so as to compensate the brightness difference caused by the difference of light transmittance of the display screen at different positions, to achieve the fine tuning of the brightness of the display screen at different positions, and to finally enable the display brightness of the display screen to be uniform. Meanwhile, the display screen is a 2D, naked-eye 3D or glasses-type 3D display screen, and the above method can enable the uniformity of the display brightness of the display screen to be improved to 95% or more, thereby achieving the high-definition or ultra-high-definition display, and enabling the backlight module group to be higher in brightness, reliability and uniformity so s to meet the demands of a joint wall product or single-machine product with higher requirements for uniformity, such as a monitoring room joint screen, a single machine, a joint screen advertisement machine, or a single machine.

An organic light emitting display apparatus includes: a plurality of pixels, each of the pixels including a light emitting device and a driving transistor configured to supply a driving current to the light emitting device based on a scan signal and a data signal; and a plurality of power lines configured to transfer a power voltage supplied from a global power line to the driving transistor of each of the pixels, wherein a level of a gate voltage of the driving transistor when the light emitting device emits light is determined by a distance between a corresponding one of the pixels and the global power line.

According to the driving method and the driving device of the display panel and the display device disclosed by the invention, the refresh rate of the to-be-displayed frame picture is acquired, and when the refresh rate of the to-be-displayed frame picture is not the highest refresh rate, the pre-stored corresponding RGB brightness correction table is called according to the refresh rate of the to-be-displayed frame picture, and the gray scale of the to-be-displayed frame picture is adjusted, and then the to-be-displayed frame image after gray scale adjustment is output, when the refresh rate is not the highest refresh rate, different refresh rates correspond to different RGB brightness correction tables, and the different RGB brightness correction tables are used for adjusting the output gray scales of the RGB sub-pixels when refresh rates in the same gray scale are switched so as to keep display brightness balance. Different RGB brightness correction tables are called when the refresh rates in the same gray scale are switched, the output gray scales of the RGB sub-pixels in the to-be-displayed frame picture are adjusted, display brightness balance under different refresh rates is kept, then the picture flicker phenomenon during refresh rate switching in the same gray scale is eliminated, and the product quality and the user experience are improved.

The invention relates to a mask plate, a splicing exposure method and a substrate, and the mask plate comprises: a first mask plate which is provided with a first shading region which comprises a first non-splicing segment and a first splicing segment, wherein the first non-splicing segment and the first splicing segment are connected with each other in a first direction; a second mask plate whichis provided with a second shading area, wherein the second shading area comprises a second non-splicing segment and a second splicing segment which are connected with each other in the first direction, the line widths of the first non-splicing segment and the second non-splicing segment in the second direction are equal, and the previous projection of the first non-splicing segment on the planewhere the film layer to be exposed is located and the later projection of the second non-splicing segment on the plane where the film layer to be exposed is located are staggered in the second direction, the line width of at least one of the first splicing segment and the second splicing segment is greater than that of the first non-splicing segment, the first direction and the second direction are perpendicular to each other and parallel to the mask plate. Therefore, the line widths of the virtual patterns formed on the photoresist layer at all positions are equal, and the line widths of thefinally formed metal patterns are ensured to be equal.

The present invention provides an AMOLED pixel driving circuit and a pixel driving method. The AMOLED pixel driving circuit utilizing the 3T1C structure comprises: a first thin film transistor (T1), a second thin film transistor (T2), a third thin film transistor (T3), a storage capacitor (Cs) and an organic light emitting diode (OLED), and the second scan signal voltage (Vsel2) in introduced. The third thin film transistor (T3) provides initial low voltage level (Vini) of the data signal voltage (VData) to the source of the first thin film transistor (T1), i.e. the drive thin film transistor in the reset stage, which can effectively compensate the threshold voltage changes of the drive thin film transistor for diminishing the complexity of the power supply voltage signal.