TOUCH PANEL'S BAGGINESS AND FLATNESS LEVEL MEASURING METHOD

摘要

A method for inspecting the bagginess and flatness level of a touch panel is provided to prevent the measurement error by automatically inspecting the bagginess of a touch panel. Minimum pressure is sensed at a load cell, and the number of pulses are counted when edge portions(202) of four edges in a touch panel are measured. The number of pulses is converted into distances. After the sum of the distances, the average value of summed distances is obtained. The average height of the edge portions is measured, and the number of pulses is counted based on the measurement of a central portion(203). The number of pulses is converted into distances, and the height of the central portion is measured. The bagginess is inspected based on the bagginess value calculated by the subtraction of the height from the average height.