Micro LED display device and a method for operating the same
Disclosed are a micro-LED display device capable of compensating for a difference between currents of pixels. The micro-LED display device includes a display panel including a plurality of pixel areas and a driver disposed in each of the pixel areas to control an operation of a plurality of pixels disposed in each of the pixel areas; and a timing controller configured to control an operation of the driver disposed in each of the pixel areas, wherein the driver comprises: a sensor for detecting current output through a LED in a first pixel of the plurality of pixels and converting the detected current into a voltage; and a converter for converting the converted voltage into a digital voltage, wherein the driver is configured to control ON/OFF of at least one driving transistor among the plurality of driving transistors disposed in the first pixel, based on the converted digital voltage.
1 . A micro-LED (light-emitting diode) display device comprising:
a display panel including a plurality of pixel areas and a driver disposed in each of the plurality of pixel areas that is configured to control an operation of a plurality of pixels disposed in each of the plurality of pixel areas, wherein each pixel has a plurality of driving transistors and an LED,
wherein gate terminals of the plurality of driving transistors are connected to each other, drain terminals of the plurality of driving transistors are connected to each other, a source terminal of any one of the plurality of driving transistors is directly connected to an anode terminal of the LED, and source terminals of remaining driving transistors are connected to the anode terminal of the LED through switches; and
wherein the driver comprises:
a sensor configured to be connected to a cathode terminal of the LED and detect a current of the LED and convert the detected current into a sensing voltage; and
an analog-to-digital converter configured to generate a switch control signal based on the sensing voltage and supply the switch control signal to the switches,
wherein a number of switches that are turned on is determined by the switch control signal configured driver.
2 . The micro-LED display device of claim 1 , further comprising a timing controller configured to control an operation of the driver disposed in each of the plurality of pixel areas,
wherein the driver is configured to control an operation of the plurality of pixels disposed in each of the plurality of pixel areas under control of the timing controller.
3 . The micro-LED display device of claim 1 , wherein the driver is configured to control a number of driving transistors to be turned ON among the plurality of driving transistors according to the switch control signal.
4 . The micro-LED display device of claim 3 , wherein as an intensity of the current of the LED decreases, the driver is configured to increase the number of driving transistors to be turned ON among the plurality of driving transistors.
5 . The micro-LED display device of claim 3 , wherein as an intensity of the current of the LED increases, the driver is configured to decrease the number of driving transistors to be turned ON among the plurality of driving transistors.
6 . The micro-LED display device of claim 3 , wherein the driver is further configured to select the at least one driving transistor to be turned ON/OFF based on a mobility of each driving transistor of the plurality of driving transistors.
7 . The micro-LED display device of claim 1 , wherein the driver is further configured to:
detect an intensity of a current flowing through at least one driving transistor in each of the plurality of pixels in each of the plurality of pixel areas; and
compensate for a current based on a difference between mobilities of driving transistors in each pixel based on the detection.
8 . The micro-LED display device of claim 1 , wherein each of the plurality of pixels disposed in each pixel area includes a first micro-LED and a second micro-LED that operates instead of the first micro-LED when a defect occurs in the first micro-LED of a specific pixel.
9 . The micro-LED display device of claim 8 , wherein each of the first micro-LED and the second micro-LED is formed by growing an inorganic material into a thin film and is transferred onto a substrate to form the micro-LED display device.