Display Timing Controller Dynamic Buffer Switching for RF Noise Reduction

Solution Overview

Problem

Display devices that reduce power consumption by setting low drive frequencies and serial data frequencies experience increased RF noise due to fluctuations in noise generation frequency during serial data transmission.

Innovation Solution

A display device with a timing controller that adjusts the frequency and bit rate of externally input image data, using a frequency adjusting unit, bit rate determining unit, and buffer switching unit to dynamically set lower frequencies and drive performance based on determined bit rates, thereby reducing RF noise and power consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by stationary object

If the drive frequency is set low to reduce power consumption, then power consumption is reduced, but RF noise increases due to fluctuations in noise generation frequency

Engineering Contradiction:

Improvepower consumptionVSAvoidRF noise

Core Design Contradiction:

Use of energy by stationary objectVSObject-generated harmful factors

Solution Approach 1:

The patent applies dynamics by making the output buffer units switchable between different drive performances based on the bit rate of input image data. The buffer switching unit dynamically selects between a first output buffer unit (higher drive performance) and a second output buffer unit (lower drive performance) according to whether the bit rate is high or low, allowing the system to adapt its power consumption and noise characteristics to actual data transmission requirements.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent applies local quality by providing different output buffer units with different drive performances for different situations. The first output buffer unit is designed with higher drive performance for high bit rate scenarios, while the second output buffer unit is designed with lower drive performance for low bit rate scenarios, optimizing both power consumption and RF noise characteristics for each specific operating condition.

Inventive Principle:

Principle #3Local quality

2Use of energy by stationary object

If the serial data frequency is set low to reduce power consumption, then power consumption is reduced, but RF noise increases due to fluctuations in noise generation frequency

Engineering Contradiction:

Improvepower consumptionVSAvoidRF noise

Core Design Contradiction:

Use of energy by stationary objectVSObject-generated harmful factors

Solution Approach 1:

The patent applies dynamics by making the output buffer units switchable between different drive performances based on the bit rate of input image data. The buffer switching unit dynamically selects between a first output buffer unit (higher drive performance) and a second output buffer unit (lower drive performance) according to whether the bit rate is high or low, allowing the system to adapt its power consumption and noise characteristics to actual data transmission requirements.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent applies local quality by providing different output buffer units with different drive performances for different situations. The first output buffer unit is designed with higher drive performance for high bit rate scenarios, while the second output buffer unit is designed with lower drive performance for low bit rate scenarios, optimizing both power consumption and RF noise characteristics for each specific operating condition.

Inventive Principle:

Principle #3Local quality

3Reliability

If the drive frequency is increased to improve image transmission quality, then image transmission quality is improved, but power consumption increases

Engineering Contradiction:

Improveimage transmission qualityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by stationary object

Solution Approach 1:

The patent applies dynamics by making the output buffer units switchable between different drive performances based on the bit rate of input image data. The buffer switching unit dynamically selects between a first output buffer unit (higher drive performance) and a second output buffer unit (lower drive performance) according to whether the bit rate is high or low, allowing the system to adapt its power consumption and noise characteristics to actual data transmission requirements.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent applies parameter changes by varying the drive performance parameter of the output buffer units based on the bit rate condition. When the bit rate is high, the system selects the first output buffer unit with higher drive performance; when the bit rate is low, it selects the second output buffer unit with lower drive performance, thereby optimizing the balance between image transmission quality and power consumption.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS10008177B2Display device

Publication Date: 2018.06.26 PANASONIC INTELLECTUAL PROPERTY CORP OF AMERICA

AI summary

Provided is a display device, including: a timing controller including: a frequency adjusting unit configured to adjust a frequency of externally input image data, which is input from an outside; a bit rate determining unit configured to determine a bit rate necessary to transmit the externally input image data; a plurality of output buffer units different from one another in drive performance; and a buffer switching unit configured to make a switch from one of the plurality of output buffer units to another, in which the frequency adjusting unit is configured to adjust the frequency of the externally input image data based on the determined bit rate, and the buffer switching unit is configured to make a switch from one of the plurality of output buffer units to another based on the determined bit rate.