Display device, display method, and electronic device

A display method comprising:

• transmitting to a light source unit a first light emitting signal for inputting to a display panel light of two colors out of three primary colors of red, green, and blue as a first input light, the first input light being input to the display panel in one of two sub-frames obtained by dividing one frame period into the two sub-frames;
• transmitting image signals of the two colors corresponding to the first input light to the display panel in synchronization with the transmission of the first light emitting signal;
• transmitting to the light source unit a second light emitting signal for inputting to the display panel light of one color out of the three primary colors as a second input light, the second input light being different from the first input light, the second input light being input to the display panel in another one of the two sub-frames;
• and
• transmitting an image signal of the one color corresponding to the second input light to the display panel in synchronization with the transmission of the second light emitting signal,
• wherein,
• the display panel includes, for every pixel, (i) a first color filter configured to transmit light of two colors out of three primary colors of red, green and blue, and (ii) a second color filter configured to transmit light of two colors out of the three primary colors, one of the colors of light transmittable through the second color filter being different from the two colors of light transmittable through the first color filter, and the display panel configured to display an image based on image signals corresponding respectively to the three primary colors,
• the light source unit has a first light emitting unit and a second light emitting unit, and in the light source unit, (i) the first light emitting unit includes either a green light emitting diode that emits green light or a blue light emitting diode that emits blue light and (ii) the second light emitting unit includes either a green light emitting diode that emits green light or a blue light emitting diode that emits blue light, the light emitting diode arranged in the second light emitting unit being of a different color than that arranged in the first light emitting unit, and (iii) either the first light emitting unit or the second light emitting unit further includes a red phosphor arranged together with the green light emitting diode or the blue light emitting diode such that the same light emitting unit emits green or blue light and also emits red light, the light emitting unit that includes the red phosphor being configured to input the first input light to the display panel in response to the transmitted first light emitting signal and the other light transmitting unit being configured to input the second input light to the display panel in response to the transmitted second light emitting signal.

An electronic device comprising:

• an image signal processing unit configured to generate a first image signal corresponding to a first color of three primary colors of red, green, and blue, a second image signal corresponding to a second color of the three primary colors, and a third image signal corresponding to a third color of the three primary colors based on an input image signal;
• and
• a display unit configured to display an image based on the first image signal, the second image signal, and the third image signal generated in the image signal processing unit,
• wherein the display unit includes
• (i) a display panel including, for every pixel, (a) a first color filter configured to transmit light of two colors out of the three primary colors, and (a) a second color filter configured to transmit light of two colors out of the three primary colors, one of the colors of light transmittable through the second color filter being different from the two colors of light transmittable through the first color filter;
• (ii) a light source unit that has a first light emitting unit and a second light emitting unit that are configured such that (a) the first light emitting unit includes either a green light emitting diode that emits green light or a blue light emitting diode that emits blue light and (b) the second light emitting unit includes either a green light emitting diode that emits green light or a blue light emitting diode that emits blue light, the light emitting diode arranged in the second light emitting unit being of a different color than that arranged in the first light emitting unit, and (c) either the first light emitting unit or the second light emitting unit further includes a red phosphor arranged together with the green light emitting diode or the blue light emitting diode such that the same light emitting unit emits green or blue light and also emits red light, the light emitting unit that includes the red phosphor being configured to input light of two colors out of the three primary colors as a first input light to the display panel in response to a first light emitting signal, and the other light transmitting unit being configured to input light of one color out of the three primary colors as a second input light to the display panel in response to a second light emitting signal, the second input light being different from the first input light,
• (iii) a light emitting control unit configured to selectively (a) output the first light emitting signal for a first respective one of the light emitting units to emit light, (b) output the second light emitting signal for a second respective one of the light emitting units to emit light, (c) output image signals from the first, second, and third image signals generated by the image signal processing unit of the two colors corresponding to the first input light, and (d) output an image signal from the first, second, and third image signals generated by the image signal processing unit of the one color corresponding to the second input light,
• wherein,
• the light emitting control unit divides one frame period into two sub-frames,
• an output of the first light emitting signal to the first respective one of the light emitting units and an output of the image signals of the two colors corresponding to the first input light to the display panel are performed in synchronization in one of the two sub-frames, and
• an output of the second light emitting signal to the second respective one of the light emitting units and an output of the image signal of the one color corresponding to the second input light to the display panel are performed in synchronization in another one of the two sub-frames.