摘要:
A calibration system may be provided for calibrating displays in electronic devices during manufacturing. The calibration system may include calibration computing equipment and a test chamber having a light sensor. The calibration computing equipment may be configured to operate the light sensor and the display to gather display intensity performance data for obtaining a display gamma model. The display intensity performance data may be gathered using a range of display control settings that will be used in performing color calibration operations for the display. The calibration computing equipment may be configured to operate the light sensor and the display to gather display color performance data for determining a display white point calibration. Display white point calibration data may be provided to the electronic device and stored in volatile or non-volatile memory in the device or may be permanently stored in circuitry associated with the display.
摘要:
Methods and devices employing circuitry for quickly discharging pixels of a display before the display is turned off are provided. In one example, a method may include receiving at the electronic display a signal indicating the electronic display will be powered off within a period of time. The method may also include, in response to the signal, causing a frame of pixel data originating from the electronic display to be stored in pixels of the electronic display before the electronic display is powered off. Storing the frame of pixel data in the pixels may inhibit image artifacts from occurring on the electronic display when the electronic display is powered back on in the future.
摘要:
Systems, methods, and devices for reducing the loss of transmittance caused by column inversion. To provide one example, an electronic display may include a display panel with columns of pixels and driver circuitry to drive the pixels using column inversion. Adjacent columns that are driven at like polarity are spaced more closely than adjacent columns driven at opposite polarities.
摘要:
Systems, methods, and devices for adjusting a white point of a liquid crystal display (LCD) using column inversion are provided. In one example, a method includes measuring white points of an electronic display that occur when the display employs different column inversion schemes. The display may be programmed to perform the column inversion scheme that produces a white point closest to a desired white point.
摘要:
With respect to liquid crystal display inversion schemes, a large change in voltage on a data line can affect the voltages on adjacent floating data lines due to capacitive coupling between data lines. The change in voltage on these floating data lines can be increased when the application of voltage to the data line occurs after a toggling operation of the Vcom, i.e., when a voltage applied to the Vcom changes the voltage on the Vcom from one polarity to an opposite polarity. Various embodiments of the present disclosure serve to eliminate or reduce the effects of Vcom voltage toggling on data line voltages by applying a voltage (e.g., a fixed voltage) to the data lines while the voltage on Vcom toggles.
摘要:
The present techniques are capable of identifying and pinpointing defective microdrivers and/or row/column drivers either before or after any μLEDs have been placed on the display. Using the architectures described herein, test data may be delivered in a parallel fashion to the drivers from support circuitry, such as a timing controller and/or a main board, and outputs based on the test data may be similarly delivered back to the support circuitry do determine which drivers are defective. This yields access to the output of every microdriver and row drier, thus enabling the identification of specific defective elements.
摘要:
Systems, methods, and devices for performing column inversion using 2-column demultiplexers are provided. In one example, an electronic display may include a display panel with columns of pixels configured to be programmed with frames of image data and display driver circuitry. The display driver circuitry may include three demultiplexers, each respectively coupled to one pixel column of a first superpixel and one pixel column of a second superpixel. Each of the three demultiplexers may receive amplified image data of a single polarity per frame.
摘要:
Systems, methods, and devices for performing column inversion using reordered image data are provided. In one example, an electronic display may include a display panel with columns of pixels and driver circuitry to drive the pixels using column inversion. The driver circuitry may drive pixels of a first superpixel in a first color order and drive pixels of an adjacent second superpixel in a second color order, such that more pixels are driven sequentially at a common polarity than would have been driven sequentially at the common polarity were the pixels of the first superpixel driven at the same color order as the pixels of the second superpixel.
摘要:
Systems, methods, and devices are provided to calibrate an electronic display to reduce or eliminate mura artifacts. Such mura artifacts may be due to differential behavior of multiple common voltage layers (VCOMs) of the display. One method for reducing or eliminating such muras may involve setting pixels of an electronic display to a gray level and setting an operating parameter of the liquid crystal display to a starting value. An image of the pixels may be captured. Using the image, an average luminance of the pixels may be determined and the image may be amplified around the average luminance to enhance contrast of the image. When the amplified image substantially does not indicates the presence of a mura, the value of the operating parameter may be stored in the electronic display.
摘要:
Present techniques involve methods and systems of inversion patterns for pixels in a display. Inversion techniques involve driving image signals having a first polarity to data lines of a pixel matrix during a first time period and driving image signals having an opposite polarity to the data lines during a second time period. In some embodiments, the pixels may be configured to have electrodes having only two finger electrodes, thus widening the distance between electrodes and decreasing the susceptibility for crosstalk between pixels. In some embodiments, horizontal cross-talk of electromagnetic fields between pixels may be further reduced by configuring the data line driving scheme such that voltage polarity is flipped for the pixels along every two, three, or more data line columns. Furthermore, a Z inversion pattern may be employed to reduce the occurrence of undesirable display artifacts.