A lighting device (3000; 100; 200; 400; 500; 700; 300; 1600), comprising: a light source (110; 210; 410; 510; 710; 310; 810) for generating a blue excitation light (3001; 811); a base board (3030; 130; 230; 430; 530; 630; 730; 330; 830) which comprises at least one sector located in the light path of the excitation light, wherein at least one of the at least one sector is a blue sector; The blue sector includes a blank sub-sector and a modification sub-sector, a wavelength conversion material layer (3040; 140; 240; 440; 540; 640; 740; 340; 840) is disposed on the modification sub-sector, wherein the wavelength conversion material layer (3040; 140; 240; 440; 540; 640; 740; 340; 840) absorbs the blue excitation light (3001; 811) and emits a converted light; a driving device, wherein the wavelength conversion material layer (3040; 140; 240; 440; 540; 640; 740; 340; 840) and the base board (3030; 130; 230; 430; 530; 630; 730; 330; 830) are fixedly connected to the driving device, and wherein the driving device drives the base board (3030; 130; 230; 430; 530; 630; 730; 330; 830) and the wavelength conversion material layer (3040; 140; 240; 440; 540; 640; 740; 340; 840) to move relatively to the blue excitation light (3001; 811), to generate a color light sequence of blue excitation light (3001; 811) and converted light wherein said combination is used as a blue light for light modulation chip; characterized in that the color coordinates of the blue light is a pre-defined blue light color coordinate which is located inside a rectangle area, the color coordinates of four vertexes of the rectangle area are respectively (0.14, 0.03), (0.18, 0.03), (0.14,0.08) and (0.18,0.08), and the color coordinate of the converted light is within a pre-defined color area, the pre-defined color area is a first color area which is formed by line segments, lines or curved lines which intersect end to end as follows: a line and its extension line formed by connecting color coordinates of the blue excitation light (3001; 811) and the color coordinate (0.14, 0.03), a line segment between the color coordinate (0.14, 0.03) and color coordinate (0.18, 0.03), a line and its extension line formed by connecting the color coordinate of the blue excitation light (3001; 811) and the color coordinate (0.18, 0.03), and a boundary curved line of the CIE 1931 color space of International Commission on Illumination. a light source (110; 210; 410; 510; 710; 310; 810) for generating a blue excitation light (3001; 811); a base board (3030; 130; 230; 430; 530; 630; 730; 330; 830) which comprises at least one sector located in the light path of the excitation light, wherein at least one of the at least one sector is a blue sector; The blue sector includes a blank sub-sector and a modification sub-sector, a wavelength conversion material layer (3040; 140; 240; 440; 540; 640; 740; 340; 840) is disposed on the modification sub-sector, wherein the wavelength conversion material layer (3040; 140; 240; 440; 540; 640; 740; 340; 840) absorbs the blue excitation light (3001; 811) and emits a converted light; a driving device, wherein the wavelength conversion material layer (3040; 140; 240; 440; 540; 640; 740; 340; 840) and the base board (3030; 130; 230; 430; 530; 630; 730; 330; 830) are fixedly connected to the driving device, and wherein the driving device drives the base board (3030; 130; 230; 430; 530; 630; 730; 330; 830) and the wavelength conversion material layer (3040; 140; 240; 440; 540; 640; 740; 340; 840) to move relatively to the blue excitation light (3001; 811), to generate a color light sequence of blue excitation light (3001; 811) and converted light wherein said combination is used as a blue light for light modulation chip; characterized in that the color coordinates of the blue light is a pre-defined blue light color coordinate which is located inside a rectangle area, the color coordinates of four vertexes of the rectangle area are respectively (0.14, 0.03), (0.18, 0.03), (0.14,0.08) and (0.18,0.08), and the color coordinate of the converted light is within a pre-defined color area, the pre-defined color area is a first color area which is formed by line segments, lines or curved lines which intersect end to end as follows: a line and its extension line formed by connecting color coordinates of the blue excitation light (3001; 811) and the color coordinate (0.14, 0.03), a line segment between the color coordinate (0.14, 0.03) and color coordinate (0.18, 0.03), a line and its extension line formed by connecting the color coordinate of the blue excitation light (3001; 811) and the color coordinate (0.18, 0.03), and a boundary curved line of the CIE 1931 color space of International Commission on Illumination.