Screen Module With Dual DDIC And Switch Circuit
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Solution Overview
Problem
The existing display driver integrated circuit (DDIC) circuit in AMOLED displays limits the screen-to-body ratio and screen resolution due to its maximum number of output channels, restricting further improvement in screen area within the same shape and size of an electronic device.
Innovation Solution
The DDIC circuit and switch circuit are positioned in non-display areas on the sides of the screen, with the gate driver on array (GOA) circuit placed on the upper and lower edges, allowing the screen pixel array to have twice the number of rows by alternately strobing pixels through row and column lines, enabled by an enabling signal circuit that controls switches connected to each output channel of the DDIC circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the DDIC circuit is disposed in a position of a lower frame on a front side of an electronic device with wiring from a bottom of the display screen, then the device structure is simple, but the screen-to-body ratio is restricted and screen resolution is limited due to maximum 2000 output channels
Solution Approach 1:
The patent divides the screen pixel array into two separate pixel arrays (first pixel array and second pixel array), each driven by its own DDIC circuit. This segmentation allows each DDIC to drive fewer rows independently, enabling the total number of rows to exceed the channel limit of a single DDIC while maintaining manageable complexity for each driving unit
Solution Approach 2:
The patent transitions from a single-sided driving approach (all rows wired from bottom) to a multi-directional approach by disposing DDIC circuits on both lower and upper frames, and wiring row lines from both bottom and top edges. This dimensional change in wiring architecture enables increased screen resolution without proportionally increasing device complexity
2Area of moving object
If the DDIC circuit is disposed at positions of frames on two sides of the screen with row and column lines connecting output channels to pixel array rows, then the screen-to-body ratio can be improved, but the number of rows is limited by the maximum 2000 output channels
Solution Approach 1:
The patent segments the driving function by using two separate DDIC circuits instead of one, with each DDIC driving a separate pixel array. This segmentation reduces the channel requirement per DDIC while enabling a larger total screen area through combined pixel arrays
Solution Approach 2:
The patent merges two separate driving systems (first DDIC + first pixel array, second DDIC + second pixel array) into a unified display output, combining the capabilities of multiple limited-channel circuits to achieve high-resolution large-area display functionality
Data Source
AI summary
A screen includes a screen pixel array, row and column lines, a display driver integrated circuit (DDIC) circuit, a gate driver on array (GOA) circuit, a switch circuit, and an enabling signal circuit. The DDIC circuit is disposed on a side of a screen of the electronic device, and includes output channels. Each output channel is connected to two switches, each switch is connected to one row line, the GOA circuit is connected to a column line, the enabling signal circuit is connected to the switch circuit, and the screen pixel array is connected to the row and column line. The enabling signal circuit generates an enabling signal for the switch circuit. The DDIC circuit sends to-be-displayed data to the switch circuit. The switch circuit controls the two switches to alternately operate. The GOA circuit strobes a column of pixels in the screen pixel array which displays the to-be-displayed data.