Non-black dead front display assembly

• US 10,209,563 B2
• Filed: 08/09/2016
• Issued: 02/19/2019
• Est. Priority Date: 05/12/2016
• Status: Active Grant

• Current Assignee: Google LLC (Alphabet Inc.)
• Original Assignee: Google LLC (Alphabet Inc.)
• Inventors: Privitera, Peter, Scott, Matthew, Giustina, Giancarlo
• Primary Examiner(s): Hanley, Britt D
• Application Number:
  US15/232,503
• Publication Number:
  US 20170329182A1
• Time in Patent Office: 924 Days
• Field of Search: None
• CPC Class Codes: G02F 1/133331 Cover glasses
• CPC Class Codes: G02F 1/133504 Diffusing, scattering, diffracting elements associated to illuminating devices G02F1/133606
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G02F 1/133562 on the viewer side
• CPC Class Codes: G02F 1/1336 Illuminating devices
• CPC Class Codes: G02F 1/133606 including a specially adapted diffusing, scattering or light controlling members

Abstract

A non-black dead front display assembly includes a display frame, a backlight system supported by the frame, the backlight system configured to generate backlight rays, a light mask disposed on the backlight system, a light mask disposed on the backlight system, the light mask configured to transmit or to block the backlight rays in response to a control signal, and a film positioned over the light mask, the film configured to reflect ambient light rays and to scatter the backlight rays transmitted through the light mask, the scattered backlight rays causing a first portion of the film to glow while a second portion of the film appears non-glowing.

Claims

1. A non-black dead front display assembly, comprising:

a display frame;

a backlight system supported by the frame, the backlight system configured to generate a backlight illumination;

a light mask disposed on the backlight system, the light mask including an array of liquid crystal pixels wherein individual pixels may either block or transmit incident rays from the backlight system to appear either opaque or transparent in response to control signals; and

a film positioned over the light mask and in direct contact with the light mask, the film configured to reflect ambient light and to scatter the backlight illumination transmitted through the light mask, the scattered backlight illumination causing a first portion of the film to glow while a second portion of the film appears non-glowing.

2. The display assembly of claim 1, wherein the film comprises a substantially white film, such that the display assembly appears a substantially uniform non-glowing white on the second portion of the film that reflects the ambient light.

3. The display assembly of claim 1, wherein the film comprises a substantially grey film, such that the display assembly appears a substantially uniform non-glowing grey on the second portion of the film that reflects the ambient light.

4. The display assembly of claim 1, further comprising a protective layer disposed on the film, the protective layer configured to pass the reflected ambient light and the scattered backlight illumination from the film.

5. The display assembly of claim 4, wherein the protective layer comprises a material selected from the group consisting of plastic, glass, ceramic and polymethyl methacrylate.

6. The display assembly of claim 1, wherein the display frame, the backlight system and the light mask are included in a liquid crystal display (LCD).

7. The display assembly of claim 6, wherein the LCD comprises a monochrome LCD.

8. The display assembly of claim 6, wherein the LCD display comprises a color LCD.

9. The display assembly of claim 1, further comprising a perforated film positioned over the light mask, the perforated film having at least one hole that allows the backlight illumination to pass through.

21. The display assembly of claim 1, further comprising a mechanical structure to bias the film against the light mask.

10. A device, comprising:

a sensor; and

a non-black dead front display assembly comprising;

a display frame;

a backlight system supported by the frame, the backlight system configured to generate a backlight illumination;

a light mask disposed on the backlight system, the light mask including an array of liquid crystal pixels wherein individual pixels may either block or transmit incident rays from the backlight system to appear either opaque or transparent in response to control signals; and

a film positioned over the light mask and in direct contact with the light mask, the film configured to reflect an ambient light and to scatter the backlight illumination transmitted through the light mask, the scattered backlight illumination causing a first portion of the film to glow while a second portion of the film appears non-glowing.

11. The device of claim 10, wherein the film comprises a substantially white film, such that the display assembly appears a substantially uniform non-glowing white on the second portion of the film that reflects the ambient light.

12. The device of claim 10, wherein the film comprises a substantially grey film, such that the display assembly appears a substantially uniform non-glowing grey on the second portion of the film that reflects the ambient light.

13. The device of claim 10, wherein the non-black dead front display assembly further comprises a protective layer disposed on the film, the protective layer configured to pass the reflected ambient light and the scattered backlight illumination from the film.

14. The device of claim 13, wherein the protective layer comprises a material selected from the group consisting of plastic, glass, ceramic and polymethyl methacrylate.

15. The device of claim 10, wherein the display frame, the backlight system and the light mask are included in a liquid crystal display (LCD).

16. The device of claim 15, wherein the LCD comprises a monochrome LCD.

17. The device of claim 15, wherein the LCD comprises a color LCD.

18. The device of claim 10, wherein the non-black dead front display assembly further comprises a perforated film positioned over the light mask, the perforated film having at least one hole that allows the backlight illumination to pass through.

19. The device of claim 10, wherein the sensor comprises a temperature sensor.

20. The device of claim 10, wherein the sensor comprises an alarm sensor.