A unit (10; 11; 12; 13) for controlling a segment liquid crystal display (15; 16), comprising at least a backplane electrode and at least a front plane electrode both being associated with a same segment of the segment liquid crystal display (15; 16), the unit (10; 11; 12; 13) comprises: a controller (30; 40; 50) configured to generate a pulse-width-modulated control signal having two voltage levels and a variable duty cycle; an integrator (60; 61) for integrating the pulse-width-modulated control signal to generate an integrated control signal having more than two voltage levels by being configured to integrate more than two different values of the variable duty cycle of the pulse-width-modulated control signal, and an output for supplying the integrated control signal to the at least a backplane electrode or to the at least a front plane electrode to control a visibility of the same segment in the segment liquid crystal display (15; 16); wherein the controller is configured to generate the variable duty cycle of the pulse-width-modulated control signal by generating different duty cycles during at least three predetermined time windows (35a, 35b, 35c) to obtain more than two voltage levels, wherein the variable duty cycle has a constant duty cycle value within each one of the three predetermined time windows (35a, 35b, 35c) and integration by the integrator (60;61) over a time span of the pulse-width-modulated control signal with a plurality of different duty cycle values, wherein the controller comprises a memory for storing a duration and/or a start instant of the three predetermined windows (35a, 35b, 35c), and the constant duty cycle values of the corresponding three predetermined time windows (35a, 35b, 35c) by an application for making visible the corresponding segments on the segment liquid crystal display, and wherein the controller comprises a direct memory access module configured for directly accessing the memory for reading the duration and/orthe start instant of the three predetermined time windows (35a, 35b, 35c) and the corresponding constant duty cycle values of the at least three of the predetermined time windows of the pulse-width-modulated control signal. a controller (30; 40; 50) configured to generate a pulse-width-modulated control signal having two voltage levels and a variable duty cycle; an integrator (60; 61) for integrating the pulse-width-modulated control signal to generate an integrated control signal having more than two voltage levels by being configured to integrate more than two different values of the variable duty cycle of the pulse-width-modulated control signal, and an output for supplying the integrated control signal to the at least a backplane electrode or to the at least a front plane electrode to control a visibility of the same segment in the segment liquid crystal display (15; 16); wherein the controller is configured to generate the variable duty cycle of the pulse-width-modulated control signal by generating different duty cycles during at least three predetermined time windows (35a, 35b, 35c) to obtain more than two voltage levels, wherein the variable duty cycle has a constant duty cycle value within each one of the three predetermined time windows (35a, 35b, 35c) and integration by the integrator (60;61) over a time span of the pulse-width-modulated control signal with a plurality of different duty cycle values, wherein the controller comprises a memory for storing a duration and/or a start instant of the three predetermined windows (35a, 35b, 35c), and the constant duty cycle values of the corresponding three predetermined time windows (35a, 35b, 35c) by an application for making visible the corresponding segments on the segment liquid crystal display, and wherein the controller comprises a direct memory access module configured for directly accessing the memory for reading the duration and/orthe start instant of the three predetermined time windows (35a, 35b, 35c) and the corresponding constant duty cycle values of the at least three of the predetermined time windows of the pulse-width-modulated control signal.