Gamma voltage generator, source driver and display device

By designing a gamma voltage generator with dynamic buffers and variable resistor units, the shortcomings of gamma voltage generators in terms of rapid setup and stability are solved, achieving efficient gamma voltage generation and uniform display effect, while reducing power consumption.

CN116895231BActive Publication Date: 2026-06-12NOVATEK MICROELECTRONICS CORP
2 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NOVATEK MICROELECTRONICS CORP
Filing Date
2023-03-20
Publication Date
2026-06-12

AI Technical Summary

⚠Technical Problem

Existing gamma voltage generators are insufficient in quickly establishing and stabilizing gamma voltages, especially under high frame rate display operations, making it difficult to guarantee the uniformity and accuracy of the display effect. Furthermore, color differences are prone to occur when multiple source driver circuits drive the same display panel.

⚗Method used

The gamma voltage generator design employs a dynamic buffer and a variable resistor unit. By switching the buffer mode when the display data is updated, and combining the use of a basic buffer and a dynamic buffer, the gamma voltage can be quickly built up and stabilized, and power consumption can be reduced when not needed.

🎯Benefits of technology

It improves the generation and driving capability of gamma voltage, reduces gamma voltage offset, ensures uniformity of display effect and fast response, and reduces total power consumption.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
Patent Text Reader

Abstract

Gamma voltage generators, source drivers, and display devices are provided. A gamma voltage generator includes a gamma voltage generation circuit having a plurality of voltage input terminals and a plurality of voltage output terminals that output a predetermined number of gamma voltages based on input voltages from the plurality of voltage input terminals, and a plurality of buffers, an input of each buffer receiving a corresponding gamma reference voltage and an output of each buffer connected to a corresponding voltage input terminal, wherein the gamma voltage generation circuit includes a plurality of resistor units in series, and a connection node of adjacent resistor units is connected as or to one voltage output terminal, each resistor unit configured to have a second resistance value when operating in a second mode that is less than a first resistance value when operating in a first mode.
Need to check novelty before this filing date? Find Prior Art