Display Panel Driver Setting via Parallel Data Distribution
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Solution Overview
Problem
Existing display panel driver settings are slow due to the need for sequential relay of setting data via cascaded wiring, leading to longer waiting times before display operations can start.
Innovation Solution
A method where one display panel driver supplies a signal indicating readout condition to a memory, which then supplies setting data onto a line, allowing all drivers to fetch and set based on this data concurrently, reducing the time required for setting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If setting data is relayed sequentially via cascade-connected wiring from one source driver to another, then the wiring structure is simple, but the setting time becomes longer as the number of stages increases
Solution Approach 1:
The patent segments the setting data transmission path by providing multiple independent wiring routes from the first source driver to different downstream source drivers. Instead of a single cascade chain, the setting data is distributed through multiple parallel paths, allowing simultaneous setting of multiple drivers and reducing total setting time while maintaining wiring simplicity.
Solution Approach 2:
The patent transitions from a one-dimensional sequential cascade connection to a two-dimensional distribution network where setting data can propagate through multiple paths simultaneously. This dimensional change allows the setting information to reach multiple source drivers in parallel rather than sequentially, significantly reducing setting time for multi-stage configurations.
2Device complexity
If a common communication line is used between all source drivers and EEPROM, then the number of dedicated lines is reduced, but the setting timing becomes more complex and time-consuming
Solution Approach 1:
The patent applies preliminary action by having the first source driver read the setting data from the EEPROM in advance before distributing it to downstream source drivers. This pre-fetching approach allows the setting data to be prepared and buffered, enabling efficient parallel distribution to multiple drivers without timing conflicts, thus reducing overall setting time while using a common communication line.
Solution Approach 2:
The first source driver acts as an intermediary between the EEPROM and the downstream source drivers. It reads the setting data from the EEPROM and then relays this data to multiple downstream drivers, simplifying the communication architecture by eliminating the need for each driver to directly communicate with the EEPROM while maintaining efficient setting timing through coordinated data distribution.
3Device complexity
If one source driver acts as a base point to fetch and relay setting data to cascade-connected downstream drivers, then the communication structure is simplified, but the setting time increases with the number of cascade stages
Solution Approach 1:
The patent segments the downstream source drivers into multiple groups that can receive setting data through different wiring paths from the first source driver. This segmentation allows parallel setting operations across multiple driver groups simultaneously, dramatically improving setting speed while maintaining the simplified communication structure where one driver (the first source driver) acts as the base point for data distribution.
Solution Approach 2:
The first source driver reads the setting data from the EEPROM and creates copies of this data to distribute to multiple downstream source drivers simultaneously through different wiring paths. This copying approach eliminates the need for sequential data relay, allowing all downstream drivers to receive identical setting data in parallel, thus improving setting speed without complicating the communication structure.
Data Source
AI summary
When multiple display panel drivers are set to a state in conformity to given specifications, setting data indicative of details of the setting is stored in a memory. One of the display panel drivers supplies a first signal indicating that the setting data is in a readout condition to the memory and other display panel drivers. In response to the first signal, the memory reads and provides the setting data on the first line. The one display panel driver fetches the setting data on the first line to perform the setting based on the setting data. The other display panel drivers fetch the setting data from the first line in response to the first signal to perform the setting based on the setting data.