System and method for differentiating pictures and texts
A dual emitting device includes a transparent substrate and an array of pixels. The array of pixels is disposed on the transparent substrate, and each pixel of the array includes at least one first sub-pixel and at least one second sub-pixel. The first sub-pixel includes a first OLED driven by a first TFT, and a first sheltering layer on the first OLED. The second sub-pixel includes a second OLED driven by a second TFT, and a second sheltering layer formed between the transparent substrate and the second OLED.
1. A dual emitting device, comprising:
a transparent substrate;
an array of pixels, disposed on the transparent substrate, each of the pixels including at least one first sub-pixel and at least one second sub-pixel, wherein the first sub-pixel includes a first organic light emitting diode driven by a first thin film transistor, and the second sub-pixel includes a second organic light emitting diode driven by a second thin film transistor;
a first sheltering layer adhered on the first organic light emitting diode;
a second sheltering layer formed between the transparent substrate and the second organic light emitting diode; and
a photoresist layer formed in between the transparent substrate and the organic light emitting diode, the photoresist being provided as a planarization layer in whole areas and an extra function of a color filter in a region of the first sub-pixel.
2. The dual emitting device of claim 1 , further comprising a color filter adhered on the second organic light emitting diode.
3. The dual emitting device of claim 1 , wherein the first organic light emitting diode and the second organic light emitting diode include a red emission layer, a green emission layer, and a blue emission layer stacked with each other.
4. The dual emitting device of claim 1 , wherein the first organic light emitting diode comprises a white organic light emitting diode.
5. The dual emitting device of claim 1 , wherein the second organic light emitting diode comprises a white organic light emitting diode.
6. The dual emitting device of claim 1 , wherein the first sheltering layer includes a black photoresist material.
7. The dual emitting device of claim 1 , wherein the first sheltering layer includes a reflective material.
8. The dual emitting device of claim 1 , wherein the first sheltering layer includes an opaque material.
9. The dual emitting device of claim 1 , wherein the first sheltering layer includes a metal oxide.
10. The dual emitting device of claim 1 , wherein the second sheltering layer includes a black photoresist material.
11. The dual emitting device of claim 1 , wherein the second sheltering layer includes a reflective material.
12. The dual emitting device of claim 1 , wherein the second sheltering layer includes an opaque metal.
13. The dual emitting device of claim 1 , wherein the second sheltering layer includes a metal oxide.
14. The dual emitting device of claim 1 , wherein the first sub-pixel is adapted to receive a first electrical signal to display a first image in a first emitting direction, and the second sub-pixel is adapted to receive a second electrical signal to display a second image in a second emitting direction.
15. The dual emitting device of claim 14 , wherein the first image and the second image are displayed at about the same time.
16. The dual emitting device of claim 1 , wherein the photoresist layer and the color filter include a color selected from the group consisting of red, green, blue and transparent.
17. The dual emitting device of claim 1 , wherein the photoresist layer and the color filter are substantially the same color.
18. The dual emitting device of claim 1 , wherein each of the first organic light emitting diode and the second organic light emitting diode has two electrodes.
19. The dual emitting device of claim 18 , wherein the transparent electrodes are IZO, ITO, AZO, or transparent semiconductors.
20. The dual emitting device of claim 1 , wherein the first organic light emitting diode and the second organic light emitting diode include a blue emission layer and a color conversion material stacked with each other.
21. The dual emitting device of claim 20 , wherein the color conversion material includes a yellow fluorescent material.