Device for projecting an image onto an eye, the device comprising a stack comprising: - light guides, each light guide being coupled to a plurality of diffraction gratings, which are distributed over the length of the light guide, each diffraction grating being electrically modulatable, each diffraction grating being configured to be electrically modulated so as to extract light propagating through the light guide; - electrodes, each electrode being associated with a plurality of diffraction gratings coupled to various light guides, respectively, each electrode being configured to modulate each diffraction grating with which it is associated; - the device comprising various emission points distributed over the length of the emission area, each emission point corresponding to an association between one electrode and one diffraction grating coupled to one light guide; the device being defined so that: - each light guide extends in such a way as to form rectilinear segments; - rectilinear segments of various light guides are placed parallel to one another, but offset from one another in a direction perpendicular to the longitudinal axis; - the emission points are distributed in such a way as to form subsets (EPD ij), the emission points of a given subset being formed by a group of electrodes superposed on a group of light guides, such that each electrode of the group of electrodes is configured to modulate the diffraction gratings coupled to various light guides of the group of light guides; - the emission points of a given subset ( EPD ij) are configured to emit a light wave in the same direction ( k ij); the device being characterized in that two successive rectilinear segments of a given light guide makie two different acute angles (α, - α) to a longitudinal axis, respectively. - light guides, each light guide being coupled to a plurality of diffraction gratings, which are distributed over the length of the light guide, each diffraction grating being electrically modulatable, each diffraction grating being configured to be electrically modulated so as to extract light propagating through the light guide; - electrodes, each electrode being associated with a plurality of diffraction gratings coupled to various light guides, respectively, each electrode being configured to modulate each diffraction grating with which it is associated; - the device comprising various emission points distributed over the length of the emission area, each emission point corresponding to an association between one electrode and one diffraction grating coupled to one light guide; - each light guide extends in such a way as to form rectilinear segments; - rectilinear segments of various light guides are placed parallel to one another, but offset from one another in a direction perpendicular to the longitudinal axis; - the emission points are distributed in such a way as to form subsets (EPD ij), the emission points of a given subset being formed by a group of electrodes superposed on a group of light guides, such that each electrode of the group of electrodes is configured to modulate the diffraction gratings coupled to various light guides of the group of light guides; - the emission points of a given subset ( EPD ij) are configured to emit a light wave in the same direction ( k ij); the device being characterized in that two successive rectilinear segments of a given light guide makie two different acute angles (α, - α) to a longitudinal axis, respectively.