An optical touch screen apparatus, comprising: a plurality of sensing pixels in a plurality of rows and a plurality of columns, each of the sensing pixels including: a light sensing pixel configured to sense light, the light sensing pixel including a first light sensor transistor and a first switch transistor connected in series, and a touch sensing pixel configured to sense light, the touch sensing pixel including a second light sensor transistor and a second switch transistor connected in series, further comprising: a first gate line connected to a gate of at least one of the first switch transistors; a first reset line connected to a gate of at least one of the first light sensor transistors; a second gate line connected to a gate of at least one of the second switch transistors; and a second reset line connected to a gate of at least one of the second light sensor transistors. characterized by the at least one of the first switch transistors, the at least one of the first light sensor transistors, the at least one of the second switch transistors and the at least one of the second light sensor transistors are part of a first sensing pixel of the plurality of sensing pixels, wherein the first light sensor transistors are first oxide semiconductor transistors configured to sense a first spectrum of light, the second light sensor transistors are second oxide semiconductor transistors configured to sense a second spectrum of light, an average wavelength of light in the first spectrum being smaller than an average wavelength of light in the second spectrum, a sensitivity of the first light sensor transistors to the first spectrum of light is greater than a sensitivity of the second light sensor transistors to the first spectrum of light, and a sensitivity of the first light sensor transistors to the second spectrum of light is less than a sensitivity of the second light sensor transistors to the second spectrum of light. a plurality of sensing pixels in a plurality of rows and a plurality of columns, each of the sensing pixels including: a light sensing pixel configured to sense light, the light sensing pixel including a first light sensor transistor and a first switch transistor connected in series, and a touch sensing pixel configured to sense light, the touch sensing pixel including a second light sensor transistor and a second switch transistor connected in series, a light sensing pixel configured to sense light, the light sensing pixel including a first light sensor transistor and a first switch transistor connected in series, and a touch sensing pixel configured to sense light, the touch sensing pixel including a second light sensor transistor and a second switch transistor connected in series, a first gate line connected to a gate of at least one of the first switch transistors; a first reset line connected to a gate of at least one of the first light sensor transistors; a second gate line connected to a gate of at least one of the second switch transistors; and a second reset line connected to a gate of at least one of the second light sensor transistors. characterized by the at least one of the first switch transistors, the at least one of the first light sensor transistors, the at least one of the second switch transistors and the at least one of the second light sensor transistors are part of a first sensing pixel of the plurality of sensing pixels, wherein the first light sensor transistors are first oxide semiconductor transistors configured to sense a first spectrum of light, the second light sensor transistors are second oxide semiconductor transistors configured to sense a second spectrum of light, an average wavelength of light in the first spectrum being smaller than an average wavelength of light in the second spectrum, a sensitivity of the first light sensor transistors to the first spectrum of light is greater than a sensitivity of the second light sensor transistors to the first spectrum of light, and a sensitivity of the first light sensor transistors to the second spectrum of light is less than a sensitivity of the second light sensor transistors to the second spectrum of light.