US 12,345,879 B2
Circuit and controller for increased bit depth in high frame rate applications
Aravind Lakshiminarayanan, Plano, TX (US); and Daniel J. Morgan, McKinney, TX (US)
Assigned to TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed by Texas Instruments Incorporated, Dallas, TX (US)
Filed on Feb. 22, 2022, as Appl. No. 17/677,071.
Application 17/677,071 is a division of application No. 16/425,588, filed on May 29, 2019, granted, now 11,314,081.
Claims priority of provisional application 62/786,419, filed on Dec. 29, 2018.
Prior Publication US 2022/0179203 A1, Jun. 9, 2022
Int. Cl. G09G 3/34 (2006.01); G02B 27/00 (2006.01); G02B 27/01 (2006.01); G09G 3/20 (2006.01)
CPC G02B 27/0068 (2013.01) [G02B 27/0172 (2013.01); G02B 27/0179 (2013.01); G09G 3/2014 (2013.01); G09G 3/2018 (2013.01); G09G 3/3406 (2013.01); G09G 3/3433 (2013.01); G09G 2310/0264 (2013.01); G09G 2330/025 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A circuit comprising:
a variable voltage source configured to produce a selectable voltage to at least one light source; and
a control section coupled to the variable voltage source, the control section configured to:
receive a sync signal indicating a bit-plane illumination process corresponding to a bit-plane of a frame;
retrieve timing information and current level information from a look-up table responsive to the sync signal, the current level information responsive to whether the bit-plane of the frame is a least significant bit-plane for the frame;
provide the current level information to the variable voltage source instructing the variable voltage source to provide a voltage level to the at least one light source responsive to the current level information; and
provide an enable signal to the at least one light source responsive to the timing information.