Segmented transparent LCD with localized backlighting
View Patent ↗A segmented transparent LCD is disclosed that includes a LC module that is substantially transparent to visible light. The segmented transparent LCD includes an array of spaced apart display segments supported by the LCD module. Each display segment is configured to display a segment of the display image. Each display segment includes a non-specular light-redirecting segment configured to provide localized backlight to the display segment when the ambient light is incident thereon. The segmented transparent LCD allows for a display image to be displayed and viewed while also allowing a viewer to see through one or more transparent regions that separate the display segments. Methods of displaying a display image using the segmented transparent LCD are also disclosed.
1. A segmented liquid crystal display (LCD) that employs ambient light for displaying a display image, comprising:
a liquid crystal (LC) module having front and rear sides and being substantially transparent to visible light; and
an array of spaced apart display segments supported by the LC module and separated by one or more transparent regions, wherein each display segment is configured to display a segment of the display image and having a light-redirecting segment configured to provide localized backlight to the display segment when the ambient light is incident thereon, wherein the one or more transparent regions include portions of the LC module and are configured to provide gaps in the display image where the display image is not formed;
wherein each display segment includes aligned front-side and rear-side polarizer segments respectively disposed on the front side and rear side of the LC module.
2. The segmented transparent LCD according to claim 1 , wherein each display segment has a dimension in the range from 1 mm to 50 mm.
3. The segmented transparent LCD according to claim 1 , wherein the display segments all have substantially the same dimensions.
4. The segmented transparent LCD according to claim 1 , wherein the LC module defines image pixels, and wherein each display segment includes between 64 image pixels and 16,000 image pixels.
5. The segmented transparent LCD according to claim 1 , wherein the light-redirecting segment is a non-specular light-redirecting segment that includes at least one of surface light-redirecting features and internal light-redirecting features.
6. The segmented transparent LCD according to claim 5 , wherein the surface light-redirecting features are defined by an amount of surface roughness.
7. The segmented transparent LCD according to claim 1 , wherein the display segments each include a light-reflecting segment cooperatively arranged with the light-redirecting segment.
8. The segmented transparent LCD according to claim 1 , wherein the display segments are substantially uniformly spaced apart.
9. The segmented transparent LCD according to claim 1 , wherein the display segments have a rectangular shape.
10. The segmented transparent LCD according to claim 1 ,
wherein the light-redirecting segment is adjacent the rear-side polarizer segment.
11. The segmented transparent LCD according to claim 7 , wherein the light-reflecting segment is on a backside of the light-redirecting segment.
12. The segmented transparent LCD according to claim 10 , wherein the light-redirecting segment is secured to the rear polarizer segment with an optically clear adhesive.
13. The segmented transparent LCD according to claim 10 , wherein the display segments are formed as islands within a single contiguous transparent region.
14. A method of displaying a display image, comprising:
providing a segmented liquid crystal display (LCD) that includes an LC module and a plurality of display segments arranged on the LC module, the plurality of display segments separated by one or more transparent regions where the display image is not displayed, wherein the transparent regions include portions of the LC module, the LC module including a front side and an opposing rear side, each of the plurality of display segments including a first portion positioned on the front side of the LC module and a second portion positioned on the rear side of the LC module, wherein each of the display segments is configured to provide localized backlighting and to display a corresponding segment of the display image;
illuminating the segmented LCD with ambient light; and
converting a portion of the ambient light into the localized backlighting in each of the display segments, thereby forming on each display segment the corresponding segment of a display image.
15. The method according to claim 14 , wherein the step of illuminating includes providing the ambient light from at least one off-axis direction with respect to the segmented transparent LCD.
16. The method according to claim 14 , wherein each display segment includes a non-specular light-redirecting segment, further wherein the converting step includes non-specularly redirecting the ambient light to form the localized backlighting.
17. The method according to claim 14 , wherein the providing step includes providing a segmented LCD having display segments wherein the display segments have the same size.
18. The method according to claim 17 , wherein the providing step includes providing a segmented LCD having display segments wherein the display segments are equally spaced apart from one another.
19. The method according to claim 14 , further including viewing an object through the one or more transparent regions while viewing the segmented transparent LCD.
20. The method according to claim 14 , wherein the converting step is performed so that the display-image segments collectively form the entirety of the display image.
21. The method according to claim 14 , wherein the converting step is performed so that the display-image segments collectively form a portion of the entirety of the display image.
22. The segmented transparent LCD according to claim 1 , wherein each of the display segments include a polarizer segment separated by the one or more transparent regions.
23. The segmented transparent LCD according to claim 1 , wherein the transparent regions do not include two or more polarizers.
24. The segmented transparent LCD according to claim 1 , wherein the transparent regions do not include a polarizer.
25. The segmented transparent LCD according to claim 1 , wherein the transparent regions do not include a light-redirecting segment.
26. The method according to claim 14 , wherein each of the display segments include a polarizer segment separated by the one or more transparent regions.
27. The method according to claim 14 , wherein the transparent regions do not include two or more polarizers.
28. The method according to claim 14 , wherein the transparent regions do not include a polarizer.
29. The method according to claim 14 , wherein the transparent regions do not include a light-redirecting segment.
30. The method according to claim 14 , wherein the first portion includes a front polarizer and the second portion includes a rear polarizer.