Depthfinder with color LCD display

Details Depthfinder with color LCD display Depthfinder with color LCD display

1986-07-30

1989-05-09

Tarcza, Thomas H.

Communications, electrical: acoustic wave systems and devices

Echo systems

Distance or direction finding

367111, 367108, 181124, G01S 968

Patent

active

048294926

ABSTRACT:
A depthfinder has a color LCD display without a polarizer. This permits viewing of the display in bright sunlight, such as would be ordinarily used for fishing, without washing out of the display. Additionally, the provision of a LCD display without a polarizing filter permits viewing of the display even by a fisherman wearing polarized sunglasses without rainbow effects or fringing effects. A micrprocessor is employed to drive a color LCD display, the display having two primary colors red and green, which can be combined to form a yellow color. Additionally, a fourth color exists when the overlying pixel elements are in an off state, the color being black. A program memory provides multicolor display functions including zoom, numeric indications and numeric adjustments, and a vertical line of a predetermined color to separate the halves of a split screen zoom display.

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