Display Touch Electrode Gate Clock Waveform Luminance
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Solution Overview
Problem
Display apparatuses with touch electrodes experience a luminance discrepancy at the lowermost end of touch groups, leading to horizontal stripe defects due to differences in the waveform of gate clocks, which affects image quality and perception.
Innovation Solution
A display apparatus is designed with a generator circuit that produces a lower gate clock with a distinct waveform compared to normal gate clocks, ensuring the lower gate pulse has a longer falling period and potentially a higher falling level, to maintain consistent luminance across all gate lines within a touch group.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a normal gate clock waveform is used for all gate lines in a touch group, then the device complexity is reduced and ease of manufacture is improved, but luminance consistency deteriorates and horizontal stripe defects occur
Solution Approach 1:
The patent applies local quality by providing different gate clock waveforms to different gate lines based on their specific positions. The lower gate line receives a gate clock with a longer falling period to compensate for its specific luminance deficiency, while other gate lines receive normal gate clocks. This localized adjustment resolves the luminance inconsistency without requiring complete waveform changes across all lines.
Solution Approach 2:
The patent changes the temporal parameter (falling period) of the gate clock waveform specifically for the lower gate line. By extending the falling period from the normal duration to a longer duration, the patent adjusts the electrical parameter to compensate for the luminance deficiency at the lower gate line, thereby resolving the horizontal stripe defect while maintaining manufacturing simplicity.
2Manufacturing precision
If the falling period of the lower gate clock is extended to compensate for luminance deficiency, then luminance consistency is improved, but the device complexity increases due to different waveform requirements
Solution Approach 1:
The patent minimizes device complexity by applying the different waveform treatment only to the specific lower gate line that exhibits luminance deficiency, rather than changing waveforms for all gate lines. This localized approach maintains simplicity while achieving luminance consistency.
Solution Approach 2:
The patent segments the gate clock signal generation by separating the lower gate line from other gate lines. The generator circuit is divided into pathways that handle normal gate lines and the lower gate line differently, allowing independent optimization of each segment's waveform characteristics to achieve overall luminance uniformity.
3Manufacturing precision
If different gate clock waveforms are supplied to different gate lines, then horizontal stripe defects are eliminated, but the ease of operation deteriorates due to complex signal management
Solution Approach 1:
The generator circuit automatically identifies and applies the appropriate gate clock waveform based on the gate line's position. The circuit self-manages the differentiation between lower and normal gate lines without requiring external intervention or complex control logic, thereby maintaining ease of operation while eliminating horizontal stripe defects.
Solution Approach 2:
The patent implements a feedback mechanism where the generator circuit receives information about the gate line position and automatically adjusts the gate clock waveform accordingly. This feedback loop ensures that the correct waveform is supplied to each gate line without requiring manual configuration, simplifying operation while achieving image quality improvement.
Data Source
AI summary
A display apparatus with touch electrode embedded therein includes a display panel including gate lines and touch groups including touch electrodes, a generator generating a lower gate clock corresponding to a lower gate pulse output to a lower gate line included in a touch group and normal gate clocks supplied to normal gate lines except the lower gate line among gate lines corresponding to the touch group, a controller supplying gate control signals to the generator, and a gate driver generating gate pulses by using the gate control signals, the lower gate clock, and the normal gate clocks and supplying the gate pulses to gate lines corresponding to the touch group. A form of the lower gate clock differs from a form of each of the normal gate clocks, each of the touch groups is arranged in parallel with the gate lines, and the touch groups are arranged in a direction vertical to the gate lines.