Patent application number | Description | Published |
20110273426 | Apparatus and method for driving e-paper panel - Disclosed herein are an apparatus and a method for driving an e-paper panel. The e-paper panel driving apparatus includes a power supply module that supplies a DC power, a DC/DC converter that converts voltage of the DC power supply supplied from the power supply module into a preset voltage, a sensing module that senses an output voltage from the DC/DC converter, and a control module that supplies or blocks the output voltage from the DC/DC converter to an e-paper panel according to the output voltage sensed by the sensing module. | 11-10-2011 |
20110292029 | Apparatus and method for driving e-paper panel - Disclosed herein are an apparatus and a method for driving an e-paper panel. The e-paper panel driving apparatus includes a DC/DC converter that converts and outputs DC voltage to be input into a preset voltage and supplies the output voltage as a driving voltage of an e-paper panel; a sensing module that senses load conditions of the e-paper panel; and a control module that varies the driving frequency of the DC/DC converter according to the load conditions of the e-paper panel sensed by the sensing module. According to the present invention, the driving clock of the DC/DC converter that supplies the driving voltage to the e-paper panel is varied in consideration of the load conditions of the e-paper panel, thereby making it possible to prevent an image quality of the e-paper panel from being degraded due to unstable power supply, while simultaneously minimizing unnecessary power consumption of the e-paper panel driving apparatus. | 12-01-2011 |
20130342519 | ORGANIC LIGHT EMITTING DEVICE - An organic light emitting device is provided. The organic light emitting device includes an organic light emitting panel, a drive unit receiving image data and image luminance discrimination signal that includes information on a maximum luminance of the image and providing a data voltage corresponding to the image luminance discrimination signal to the organic light emitting panel, and a power supply unit providing a common voltage to the organic light emitting panel. The common voltage is varied to correspond to the image luminance discrimination signal. | 12-26-2013 |
20150070339 | DISPLAY DEVICE AND DRIVING METHOD THEROF - A display device including pixels; a leakage current compensator connected to at least one of data lines connected to the pixels; and an integrator connected to the leakage current compensator. The leakage current compensator is configured to store a voltage that corresponds to a leakage current that flows to the at least one data line, and to flow the leakage current to ground from the at least one data line according to a voltage that corresponds to the leakage current. The integrator is configured to receive a pixel current generated by subtracting the leakage current from a measurement current that flows to the at least one data line, and to output a difference value between a pixel voltage that corresponds to the pixel current and a reference voltage. | 03-12-2015 |
20150077314 | AMOLED DISPLAY DEVICE AND DRIVING METHOD THEREOF - A display device is disclosed. In one aspect, the display device includes a plurality of pixels, a plurality of data lines respectively connected to the pixels, and a compensation unit connected to at least one the data lines. The compensation unit includes a first capacitor storing a leakage current of a pixel connected to the data line, a second capacitor storing a difference current, where the difference current is the difference between a reference current and a pixel current measured when a data signal of a reference gray signal is applied to the pixel. The compensation unit also includes a comparator outputting a difference value between the voltages stored in the first and second capacitors. According to embodiments, is possible to measure an accurate pixel current regardless of a leakage current and accurately detect deterioration of a pixel. | 03-19-2015 |
20150091784 | NON-LINEAR GAMMA COMPENSATION CURRENT MODE DIGITAL-ANALOG CONVERTOR AND DISPLAY DEVICE INCLUDING THE SAME - A non-linear gamma compensation current mode digital-analog converter includes: a first digital-analog converter block configured to: receive a digital signal, a first reference voltage, and a gamma adjustment voltage, and provide a reference current to a ground, wherein a first current flowing to a first current output terminal is determined according to the digital signal and the gamma adjustment voltage; and a second digital-analog converter block configured to: receive the digital signal, a second reference voltage, and a ground voltage, and provide the first current to the first digital-analog converter, wherein a second current flowing to a second current output terminal is determined according to the digital signal and the first current. | 04-02-2015 |
20150103062 | DISPLAY DEVICE AND DRIVING METHOD THEREOF - A display device according to an embodiment of the present invention includes: a pixel configured to emit light according to a data signal supplied to a data line, a power source voltage supplier configured to supply a power source voltage to the pixel, a driving transistor configured to drive the pixel to be emitted according to the data signal and the power source voltage, and a sensor configured to supply a test signal to a data line and to detect a sensing current flowing to the data line through the driving transistor according to the test signal. | 04-16-2015 |
20150138177 | DISPLAY DEVICE AND DRIVING METHOD THEREOF - A display device includes: a plurality of pixels, each being coupled to a corresponding data line among a plurality of data lines and a corresponding scan line among a plurality of scan lines; a scan driver to supply a scan signal to the scan lines; a sensor coupled to the pixels and the data lines and configured to detect a sensing current according to a test signal input to the data lines; and a controller configured to detect a pixel current of a pixel corresponding to a scan line to which the scan signal is supplied, by using a first sensing current corresponding to a first pixel and a second sensing current corresponding to a second pixel, when the scan signal is selectively supplied to a first scan line coupled to the first pixel and a second scan line coupled to the second pixel. | 05-21-2015 |