s 4 for each of the layers and the superimposed layer image signals s 3 to the crt driver 8 in this case the display section signal s 4 for the character layer 5 corresponds to a display section signal c of horizontal hc u00d7 vertical vc shown in fig3 c the display section signal s 4 for the still image layer 6 corresponds to a display section signal b of horizontal hb u00d7 vertical vb shown in fig3 b and the display section signal s 4 for the moving image layer 7 corresponds to a display section signal a of horizontal ha u00d7 vertical va shown in fig3 a incidentally each of the display section signals may be outputted so as to correspond to a preset arbitrarily changeable form the crt driver 8 reads preset image processing parameters stored in the parameter table 9 in a table form the image processing unit 10 subjects each of the layer image signals s 3 to optimum image processing for an area of its display section signal s 4 according to the parameters stored in the parameter table 9 in this case parameter settings stored in the parameter table 9 are parameter settings c 29 for the character layer 26 shown in fig3 c parameter settings b 28 for the still image layer 25 shown in fig3 b and parameter settings a 27 for the moving image layer 24 shown in fig3 a in this case in the parameter settings c 29 for the character layer 26 image processing for sharpness vm dynamic picture and hyper white is off and therefore is not performed while color temperature is set relatively high in the parameter settings b.