Display module having a light source

A display module having a light source, wherein the light source has an emission spectrum, and the display module comprises:

• a display unit, comprising:
• a first substrate;
• a second substrate;
• a display medium disposed between the first substrate and the second substrate;
• and
• a green filter layer disposed on the first substrate and having a transmission spectrum, wherein
• a product of a first illumination intensity value corresponding to a maximum peak wavelength of the emission spectrum of the light source between 480 nm and 660 nm of wavelength and a first transmittance intensity value corresponding to the maximum peak wavelength of the transmission spectrum of the green filter layer is a first product value,
• wherein the emission spectrum and the transmission spectrum between 660 nm and 780 nm of wavelength has a cross-point, and a product of a second illumination intensity value of the emission spectrum corresponding to the cross-point and a second transmittance intensity value of the transmission spectrum corresponding to the cross-point is a second product value, and a ratio of the second product value to the first product value is less than 2%, wherein the emission spectrum and the transmission spectrum are normalized.