A passive matrix display device (100; 200) comprising: a set of first electrodes (121; 221), each first electrode (121; 221) comprising an electrochromic and electrochemically active organic polymer material that is electrochemically switchable between different visually detectable coloring states, and a set of second electrodes (122; 222), wherein the set of first electrodes (121; 221) and the set of second electrodes (122; 222) are electronically isolated from each other and arranged such that each of the first electrodes (121; 221) intersects each of the second electrodes (221; 222) at only one intersection, and at each intersection there is arranged a pixel cell, and the pixel cells are arranged in a matrix, wherein each pixel cell comprises: a first pixel layer (111; 211) which is the portion of the respective first electrode (121; 221) located at the intersection; a second pixel layer (112; 212) facing said first pixel layer, and a third pixel layer (113; 213) of solidified electrolyte which is arranged spatially between, and in ionic contact with, the first and second pixel layers, wherein the second pixel layer (112; 212) of each pixel cell (110; 210) is formed of a material comprising electrically conductive carbon, and the solidified electrolyte is a polycationic electrolyte or a polyanionic electrolyte, thereby providing a threshold voltage in response to a voltage applied across the pixel cell, and wherein the coloring of each pixel cell is provided by a change in redox state of the electrochromic and electrochemically active organic polymer material, and the color of the electrolyte remains unchanged during a color switching of the pixel cell, the second pixel layer (112; 212) of each pixel cell (110; 210) being either the portion of the respective second electrode (122a; 222a) located at the intersection, or a separate layer in electronic contact with the respective second electrode (122a; 222a) at the intersection. a set of first electrodes (121; 221), each first electrode (121; 221) comprising an electrochromic and electrochemically active organic polymer material that is electrochemically switchable between different visually detectable coloring states, and a set of second electrodes (122; 222), wherein the set of first electrodes (121; 221) and the set of second electrodes (122; 222) are electronically isolated from each other and arranged such that each of the first electrodes (121; 221) intersects each of the second electrodes (221; 222) at only one intersection, and at each intersection there is arranged a pixel cell, and the pixel cells are arranged in a matrix, wherein each pixel cell comprises: a first pixel layer (111; 211) which is the portion of the respective first electrode (121; 221) located at the intersection; a second pixel layer (112; 212) facing said first pixel layer, and a third pixel layer (113; 213) of solidified electrolyte which is arranged spatially between, and in ionic contact with, the first and second pixel layers, wherein the second pixel layer (112; 212) of each pixel cell (110; 210) is formed of a material comprising electrically conductive carbon, and the solidified electrolyte is a polycationic electrolyte or a polyanionic electrolyte, thereby providing a threshold voltage in response to a voltage applied across the pixel cell, and wherein the coloring of each pixel cell is provided by a change in redox state of the electrochromic and electrochemically active organic polymer material, and the color of the electrolyte remains unchanged during a color switching of the pixel cell, the second pixel layer (112; 212) of each pixel cell (110; 210) being either the portion of the respective second electrode (122a; 222a) located at the intersection, or a separate layer in electronic contact with the respective second electrode (122a; 222a) at the intersection. a first pixel layer (111; 211) which is the portion of the respective first electrode (121; 221) located at the intersection; a second pixel layer (112; 212) facing said first pixel layer, and a third pixel layer (113; 213) of solidified electrolyte which is arranged spatially between, and in ionic contact with, the first and second pixel layers, wherein the second pixel layer (112; 212) of each pixel cell (110; 210) is formed of a material comprising electrically conductive carbon, and the solidified electrolyte is a polycationic electrolyte or a polyanionic electrolyte, thereby providing a threshold voltage in response to a voltage applied across the pixel cell, and wherein the coloring of each pixel cell is provided by a change in redox state of the electrochromic and electrochemically active organic polymer material, and the color of the electrolyte remains unchanged during a color switching of the pixel cell, the second pixel layer (112; 212) of each pixel cell (110; 210) being either the portion of the respective second electrode (122a; 222a) located at the intersection, or a separate layer in electronic contact with the respective second electrode (122a; 222a) at the intersection.