Data driving device and liquid crystal display device using the same
AssigneeLG Display Co., Ltd.
InventorsJoo Hong Lee, Hong Sung Song, Woong Ki Min, Yong Gi Son
Life of this patent
Estimating the term…
Abstract
A gray scale voltage generator includes a voltage dividing resistor string to generate blue (B), red (R), and green (G) gamma voltage signals, the voltage dividing resistor string including a B gamma voltage signal generating section, a R/G gamma voltage generating section, and a common (COM) gamma voltage generating section to individually control a B gray scale voltage and a R/G gray scale voltage to maintain a constant color temperature.
Claims17
A gray scale voltage generator, comprising:
- a voltage dividing resistor string to generate blue (B), red (R), and green (G) gamma voltage signals, the voltage dividing resistor string including
- a B gamma voltage signal generating section,
- a R/G gamma voltage generating section, and
- a common (COM) gamma voltage generating section to individually control a B gray scale voltage and a R/G gray scale voltage to maintain a constant color temperature.
The gray scale voltage generator of claim 2, wherein the R/G gamma voltage generating section is connected to an external resistor to fine tune the R/G gray scale voltage.
A data driving device for a liquid crystal display, comprising:
- a control circuit to relay red (R), green (G), and blue (B) data signals;
- a gray scale voltage generator to generate gray scale voltages;
- a digital processor to latch the R, G, B data signals;
- and
- an analog processor to convert the latched R, G, B data supplied from the digital processor into image signals to be displayed on the liquid crystal display,
- the gray scale voltage generator including
- a voltage dividing resistor string to generate R, G, and B gamma voltage signals, the voltage dividing resistor string including
- a B gamma voltage signal generating section,
- a R/G gamma voltage generating section, and
- a common (COM) gamma voltage generating section to individually control a B gray scale voltage and a R/G gray scale voltage to maintain a constant color temperature.
Dependencies are inferred from the claim text.