Dynamic LED Driving Current Compensation for Cross-Panel Backlight Illumination Uniformity
First Claim
1. A dynamic light emitting diode (LED) driving current compensation method for ensuring cross-panel backlight illumination uniformity in a display device, the method comprising:
- providing a backlight panel with a plurality of waveguide pipes and a front panel with a plurality of rows, where each row overlies a corresponding waveguide pipe and includes a plurality of selectively enabled pixels formed in a sequence along the row;
supplying light from a plurality of LEDs, where each LED supplies light to a corresponding waveguide pipe;
for each front panel row, selecting a pixel to enable; and
,for each front panel row, selecting an LED drive current in response to the enabled pixel.
1 Assignment
0 Petitions
Accused Products
Abstract
A dynamic light emitting diode (LED) driving current compensation method is provided for ensuring cross-panel backlight illumination uniformity in a display device. A backlight panel includes a plurality of waveguide pipes and a front panel with a plurality of pixel rows. Each row overlies a corresponding waveguide pipe and includes a plurality of selectively enabled pixels formed in a sequence along the row. Light is supplied from a plurality of LEDs, where each LED supplies light to a corresponding waveguide pipe. For each front panel row, a pixel is selected for enablement and an LED drive current is selected in response to the enabled pixel. The LED drive current is selected in response to the distance between the waveguide pipe position underlying an enabled pixel in a corresponding front panel row and the first light interface.
-
Citations
17 Claims
-
1. A dynamic light emitting diode (LED) driving current compensation method for ensuring cross-panel backlight illumination uniformity in a display device, the method comprising:
-
providing a backlight panel with a plurality of waveguide pipes and a front panel with a plurality of rows, where each row overlies a corresponding waveguide pipe and includes a plurality of selectively enabled pixels formed in a sequence along the row; supplying light from a plurality of LEDs, where each LED supplies light to a corresponding waveguide pipe; for each front panel row, selecting a pixel to enable; and
,for each front panel row, selecting an LED drive current in response to the enabled pixel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A display device with dynamic light emitting diode (LED) driving current compensation for ensuring cross-panel backlight illumination uniformity, the device comprising:
-
a backlight panel with a plurality of waveguide pipes, each waveguide pipe having an optical interface and a top surface to supply-redirected light received via the optical interface; a front panel including a plurality of rows, where each row overlies the top surface of a corresponding waveguide pipe, where each row includes a plurality of pixels formed in a sequence along the row, and where each pixel has an electrical input to accept a pixel selection signal for enabling a selected pixel to transmit redirected light received from a corresponding waveguide pipe; a plurality of LEDs, each LED having an electrical input to accept a drive current signal and an optical interface to supply light to a corresponding waveguide pipe optical interface with an intensity responsive to the drive current signal; and
,an LED compensation module having an electrical input to accept the pixel selection signal for each row and an output to supply the drive current signal to each LED, where the drive current signal to each LED is responsive to the selected pixel in a corresponding front panel row. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
-
Specification