Display Timing Controller Image Rotation via Inversion
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Solution Overview
Problem
Conventional display technologies for rotating images are complex, prone to errors, and costly, especially when using signal sources like coaxial cables that cannot generate rotated image data, or require additional hardware for frame size storage.
Innovation Solution
A display apparatus with a control system and display panel that uses a timing controller and control unit to perform a 180-degree rotation of images by mirroring and inverting video data streams, simplifying the process and reducing hardware costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the control main chip rotates the received normal image data, then the image can be rotated, but the control process becomes complex and error-prone due to continuous register access and direction management
Solution Approach 1:
The patent extracts the image rotation function from the control main chip and relocates it to the timing controller. By moving the rotation operation to the timing controller, the control main chip is relieved of complex rotation processing, thereby simplifying the overall control process and reducing errors associated with continuous register access and direction management.
Solution Approach 2:
The timing controller serves as an intermediary component between the signal source and the display panel. It receives normal image data, performs rotation processing, and outputs the rotated data to the display panel. This intermediary approach allows rotation functionality to be added without complicating the control main chip's operation.
2Device complexity
If a timing controller is used to rotate the image instead of the control main chip, then the control process is simplified, but additional hardware with frame size storage is required
Solution Approach 1:
The patent makes the timing controller multi-functional by enabling it to perform both its traditional timing and control functions plus the additional image rotation function. By utilizing the existing timing controller resource for rotation processing, the patent avoids adding separate dedicated rotation hardware, thereby reducing manufacturing costs while maintaining simplified control.
Solution Approach 2:
The patent merges the image rotation function with the timing controller's existing functionalities. Instead of implementing rotation as a separate hardware component, it combines rotation processing with the timing controller's data handling capabilities, thereby reducing the need for additional frame size storage hardware and lowering overall system cost.
3Shape
If the display panel is disposed upside down, then the image rotation is achieved, but the scan line sequence must be reversed to maintain correct display orientation
Solution Approach 1:
The patent applies physical inversion by disposing the display panel upside down, and compensates for this inversion by inverting the scan line sequence through software control. The timing controller outputs scan lines in reverse order (from bottom to top instead of top to bottom), which compensates for the physical panel inversion and maintains correct image orientation.
Data Source
AI summary
A display apparatus has a housing, a base, a system board and a display panel. The base is connected to the housing such that the display apparatus is disposed on a flat surface. The system board is disposed in the housing and has a control system for performing an up-down inversing process for an image transmitted from a signal source. The display panel has a timing controller and a pixel array. Specifically, the display panel is put upside down in the housing such that the pixel array is also upside down, and the timing controller is adjacent to the location connecting the base with the housing. The timing controller is coupled to the system board, to perform a left-right mirroring process for the up-down inversed image.