Device for generating images and head-up display of automotive vehicle

Abstract

The subject of the invention is a device for generating images ( 10 ) for automotive vehicle head-up display ( 100 ), comprising a liquid crystal screen ( 12 ) and a back-lighting device ( 14 ), said back-lighting device ( 14 ) comprising: at least one light-emitting diode ( 16 ), a housing ( 28; 29 ) surrounding the space lying between the at least one light-emitting diode ( 16 ) and the liquid crystal screen ( 12 ), characterized in that said housing ( 28; 29 ) is bent, the device for generating images ( 10 ) furthermore comprising a reflecting surface ( 31; 32 ) arranged in a bent portion ( 28 c; 29 c ) of the housing ( 28; 29 ) and oriented in such a way as to reflect the light emitted by the at least one light-emitting diode ( 16 ) in the direction of the screen ( 12 ). The invention also relates to a head-up display ( 100 ).

1 . An imaging device for head-up display of a motor vehicle, comprising a liquid crystal screen and a back-lighting device, said back-lighting device comprising:
 at least one light-emitting diode;   a housing surrounding the space contained between the at least one light-emitting diode and the liquid crystal screen, wherein said housing is bent; and   a reflecting surface arranged in a bent portion of the housing and oriented to reflect the light emitted by the at least one light-emitting diode toward the screen.   
     
     
         2 . The imaging device as claimed in  claim 1 , wherein the reflecting surface is concave. 
     
     
         3 . The imaging device as claimed in  claim 1 , wherein the reflecting surface is defined by the sum of the equation of a cone and of a series of polynomials. 
     
     
         4 . The imaging device as claimed in  claim 1 , wherein the reflecting surface is an inclined planar surface. 
     
     
         5 . The imaging device as claimed in  claim 1 , further comprising, a support fixed to the housing, the reflecting surface being formed by a metallic coating deposited on the support. 
     
     
         6 . The imaging device as claimed in  claim 5 , wherein the support is obtained by plastic injection. 
     
     
         7 . The imaging device as claimed in  claim 1 , wherein the reflecting surface is formed by an internal surface of the bent portion of the housing. 
     
     
         8 . The imaging device as claimed in  claim 1 , wherein the reflecting surface is a mirror surface. 
     
     
         9 . The imaging device as claimed in  claim 1 , wherein the bend of the housing forms an angle of between 30 and 120°. 
     
     
         10 . A head-up display comprising an imaging device as claimed in  claim 1 .