Conductive sheet, touch panel, display device, method for producing conductive sheet, and recording medium

A method for producing a conductive sheet, comprising:

• a generation step of generating image data representing a design of a mesh pattern in which different mesh shapes are arrayed;
• a calculation step of calculating an evaluation value, which quantifies a degree of variation of centroid positions of the mesh shapes, based on the generated image data;
• a determination step of determining a piece of the image data as output image data based on the calculated evaluation value and predetermined evaluation conditions;
• and
• an output step of obtaining a conductive sheet, in which the mesh pattern is formed on a base in plan view, by outputting and forming a conductive wire on the base based on the determined output image data,
• wherein, in the calculation step,
• a predetermined spatial frequency is set,
• an average intensity on a spatial frequency band side higher than the predetermined spatial frequency and an average intensity on a spatial frequency band side lower than the predetermined spatial frequency are calculated based on the two-dimensional power spectrum of a centroid position distribution of the mesh shapes obtained based on the generated image data, and
• a trail to calculate a root mean square deviation (RMS) of each centroid positions of the mesh shapes and arbitrarily selected which are disposed along a predetermined direction with respect to a direction perpendicular to the predetermined direction based on the generated image data is repeated to obtain the RMS in each trial and the average value (RMSave) thereof and the evaluation value (EV) is calculated by using the RMS and the RMSave, and
• wherein, in the determining step,
• a piece of the image data is determined such that,
• the average intensity on the spatial frequency band side higher than the predetermined spatial frequency is larger than the average intensity on the spatial frequency band side lower than the predetermined spatial frequency, and
• the evaluation value (EV) is equal to or greater than 15 μm and equal to or less than 65 μm.

A non-transitory computer-readable recording medium that records a program causing a computer to execute as a procedure:

• a generation step of generating image data representing a design of a mesh pattern in which different mesh shapes are arrayed;
• a calculation step of calculating an evaluation value, which quantifies a degree of variation of centroid positions of the mesh shapes, based on the generated image data;
• and
• a determination step of determining a piece of the image data as output image data based on the calculated evaluation value and predetermined evaluation conditions,
• wherein, in the calculation step,
• a predetermined spatial frequency is set,
• an average intensity on a spatial frequency band side higher than the predetermined spatial frequency and an average intensity on a spatial frequency band side lower than the predetermined spatial frequency are calculated based on the two-dimensional power spectrum of a centroid position distribution of the mesh shapes obtained based on the generated image data, and
• a trail to calculate a root mean square deviation (RMS) of each centroid positions of the mesh shapes and arbitrarily selected which are disposed along a predetermined direction with respect to a direction perpendicular to the predetermined direction based on the generated image data is repeated to obtain the RMS in each trial and the average value (RMSave) thereof and the evaluation value (EV) is calculated by using the RMS and the RMSave, and
• wherein, in the determining step,
• a piece of the image data is determined such that,
• the average intensity on the spatial frequency band side higher than the predetermined spatial frequency is larger than the average intensity on the spatial frequency band side lower than the predetermined spatial frequency, and
• the evaluation value (EV) is equal to or greater than 15 μm and equal to or less than 65 μm.