Display Device Pre-Display Operation for Uniformity
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Solution Overview
Problem
Display devices with touch input functions often face issues with non-uniform displays due to dielectric dispersion in insulating layers, leading to delayed potential changes between signal and common lines, which results in display unevenness.
Innovation Solution
Implementing a pre-display operation that applies a higher voltage to the signal lines before the main display operation, ensuring the potential approaches the desired state beforehand, and potentially including a second voltage application to further stabilize the signal line potentials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If touch sensing operation is inserted in display device, then input function is improved, but display uniformity deteriorates due to dielectric dispersion
Solution Approach 1:
The patent applies preliminary action by performing a pre-display operation before the main display operation. This pre-display operation applies a first voltage to the signal lines to establish stable potentials before touch sensing or subsequent display operations occur. By preparing the signal line potentials in advance, the patent eliminates display non-uniformity caused by dielectric dispersion during touch sensing while maintaining the touch input function.
2Reliability
If potential change is delayed in insulating layer, then dielectric dispersion occurs, but display uniformity deteriorates
Solution Approach 1:
The patent performs a pre-display operation that applies voltage to signal lines before the main display operation. This preliminary voltage application ensures that potential changes are established before any display output occurs, preventing delays caused by dielectric dispersion in the insulating layer and ensuring uniform display across all pixels.
Solution Approach 2:
The patent changes the voltage parameter by applying a first voltage during the pre-display operation and potentially a second voltage during the main display operation. This parameter change strategy ensures that signal line potentials are properly established to compensate for dielectric dispersion effects, maintaining display uniformity while preserving signal transmission reliability.
3Manufacturing precision
If pre-display operation applies higher voltage, then display uniformity is improved, but energy consumption increases
Solution Approach 1:
The patent applies a first voltage during the pre-display operation to establish stable potentials in signal lines before the main display operation. This preliminary action ensures display uniformity by pre-conditioning the electrical state of the signal lines, preventing energy-wasting potential adjustments during subsequent operations.
Solution Approach 2:
The patent employs parameter changes by applying different voltages at different operational stages: a first voltage during the pre-display operation and potentially a second voltage during the main display operation. This staged voltage application optimizes energy consumption by applying higher voltage only when necessary to establish uniform potentials, rather than maintaining high voltage throughout all operations.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances display uniformity by pre-conditioning the signal line potentials, reducing the impact of dielectric relaxation and dielectric dispersion, resulting in a more consistent and uniform display.
Implementation Method 1
A first insulating layer is provided between the second interconnects and the third interconnects
Implementation Method 2
The display layer performs an optical operation of at least one selected from a light emission and a change of an optical characteristic based on an electrical signal provided to the pixel electrodes
Data Source
AI summary
According to one embodiment, a display device includes first interconnects, second interconnects, third interconnects, fourth interconnects, switch elements, pixel electrodes, a first insulating layer, a display layer, and a control unit. Each of the switch elements is electrically connected to one of the first interconnects and one of the second interconnects. The pixel electrodes are electrically connected respectively to the switch elements. The first insulating layer is provided between the second and third interconnects. The fourth interconnects are separated from the first to third interconnects, the switch elements, and the pixel electrodes. The display layer is provided between the pixel electrodes and the fourth interconnects. The display layer performs an optical operation of one of a light emission and a change of an optical characteristic. The control unit performs a sense operation, a first display operation, a second display operation, and a pre-display operation.