Touch Display Panel Module Integrating Physical Keys on Substrate
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Solution Overview
Problem
Current on-cell/in-cell touch display panels do not integrate touch functions and physical keys on the same substrate, leading to excessive thickness and bulkiness, and fail to meet the functional specifications of innovative products.
Innovation Solution
A module structure comprising a backlight module, a liquid crystal panel, a touch layer, a first circuit board, a second circuit board, and a protection layer, where the touch layer and circuit boards are integrated on the liquid crystal panel to provide both touch operations and physical key functions, with a user interface unit optionally integrated in the touch layer or display region, reducing the need for additional components and enhancing integration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If touch functions and physical keys are integrated on the same substrate, then thickness and bulkiness are reduced, but device complexity increases
Solution Approach 1:
The patent merges the touch panel and physical key functions onto the same substrate (color filter substrate). The touch patterns and physical key patterns are both fabricated on the CF substrate, eliminating the need for separate layers or components. This integration directly reduces the overall thickness and bulkiness of the display device while combining multiple functions into a single unified structure.
Solution Approach 2:
The color filter substrate serves multiple functions simultaneously: it acts as the base for touch patterns, the base for physical key patterns, and the optical filtering layer. By making the CF substrate multi-functional, the patent eliminates the need for separate dedicated layers for touch sensing and physical keys, thereby reducing thickness without sacrificing functionality.
2Device complexity
If touch patterns and physical key patterns are fabricated on the color filter substrate, then the number of components is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The patent combines the fabrication of touch patterns and physical key patterns into a single process step on the color filter substrate. By using the same substrate and fabrication process for both pattern types, the patent reduces the total number of components and manufacturing steps, while the precision requirements are managed through unified process control rather than multiple separate processes.
3Length of stationary object
If on-cell/in-cell method is used instead of add-on method, then thickness is reduced, but functional integration capability is limited
Solution Approach 1:
The patent enhances the functional integration capability of the on-cell/in-cell method by making the color filter substrate a multi-functional platform. It not only performs optical filtering but also serves as the substrate for both touch sensing patterns and physical key patterns. This universality allows the thin on-cell/in-cell structure to support multiple functions that would traditionally require separate components.
Solution Approach 2:
The patent merges touch sensing functionality and physical key functionality into the same structural layer (the color filter substrate). This combination allows the display to achieve reduced thickness through on-cell/in-cell integration while simultaneously providing both touch and physical key functions, overcoming the limitation of functional integration capability.
Data Source
AI summary
A module structure of touch display panel is provided. The module structure comprises a backlight module, a liquid crystal panel, a touch layer, a first circuit board, a second circuit board, and a protection layer. The liquid crystal panel is disposed above the backlight module; the touch layer is disposed on the liquid crystal panel. The first circuit board is disposed on the liquid crystal panel, and is further disposed with a first side of the liquid crystal panel and a first side of the touch layer. The second circuit board is disposed on the liquid crystal panel, and is further disposed with a second side of the liquid crystal panel and a second side of the touch layer. Additionally, the protection layer is disposed above the touch layer, the first circuit board, and the second circuit board.