Display device

• US 10,073,294 B1
• Filed: 07/27/2017
• Issued: 09/11/2018
• Est. Priority Date: 03/31/2017
• Status: Active Grant

• Current Assignee: InnoLux Corporation
• Original Assignee: InnoLux Corporation
• Inventors: Lin, Hsiao-Lang, Chen, Jia-Yuan, Yueh, Jui-Jen, Lee, Kuan-Feng, Tsai, Tsung-Han
• Primary Examiner(s): Williams, Joseph L
• Assistant Examiner(s): Diaz, Jose M
• Application Number:
  US15/662,256
• Publication Number:
  US 20180284501A1
• Time in Patent Office: 411 Days
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/133562 on the viewer side
• CPC Class Codes: G02F 1/1336 Illuminating devices
• CPC Class Codes: G02F 1/133603 with LEDs
• CPC Class Codes: G02F 1/133614 using photoluminescence, e.g. phosphors illuminated by UV or blue light
• CPC Class Codes: G02F 1/133616 Front illuminating devices
• CPC Class Codes: G02F 2201/52 RGB geometrical arrangements
• CPC Class Codes: G02F 2202/36 Micro- or nanomaterials
• CPC Class Codes: G02F 2203/30 Gray scale
• CPC Class Codes: G06F 1/1601 Constructional details related to the housing of computer displays, e.g. of CRT monitors, of flat displays constructional details related to flat displays integrated in a portable computer, e.g. laptop, handheld computer G06F1/1637; constructional details related to television receivers H04N5/64
• CPC Class Codes: G06F 2203/04102 Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper
• CPC Class Codes: G06F 2203/04111 Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
• CPC Class Codes: G06F 2203/04112 Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G09G 2300/0452 Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
• CPC Class Codes: G09G 3/20 for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
• CPC Class Codes: G09G 3/3607 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels display of colours in flat matrix panels other than liquid crystal displays G09G3/2003; grey scales specific for television H04N3/127
• CPC Class Codes: H10K 50/865 comprising light absorbing layers, e.g. light-blocking layers
• CPC Class Codes: H10K 59/351 comprising more than three subpixels, e.g. red-green-blue-white [RGBW]
• CPC Class Codes: H10K 59/352 the areas of the RGB subpixels being different
• CPC Class Codes: H10K 59/353 : characterised by the geometrical arrangement of the RGB subpixels
• CPC Class Codes: H10K 59/38 : comprising colour filters or colour changing media [CCM]
• CPC Class Codes: H10K 59/40 : OLEDs integrated with touch screens

Abstract

A display device includes a first display unit and a second display unit. The first display unit emits a first output light having a first output spectrum corresponding to a highest gray level of the display device. The second display unit emits a second output light having a second output spectrum corresponding to the highest gray level of the display device. Wherein, a mixed output spectrum is a mixture spectrum of the first output spectrum and the second output spectrum, a maximum peak of the first output spectrum from 507 nm to 555 nm is defined as a first peak corresponding to a first wavelength, a maximum peak of the mixed output spectrum from 507 nm to 555 nm is defined as a mixed peak corresponding to a mixture wavelength, and the first wavelength is different from the mixture wavelength.

Claims

1. A display device, comprising:

a first display unit emitting a first output light having a first output spectrum corresponding to a highest gray level of the display device; and

a second display unit emitting a second output light having a second output spectrum corresponding to the highest gray level of the display device,

wherein a mixed output spectrum is a mixture spectrum of the first output spectrum and the second output spectrum, a maximum peak of the first output spectrum within a range from 507 nm to 555 nm is defined as a first peak corresponding to a first wavelength, a maximum peak of the mixed output spectrum from 507 nm to 555 nm is defined as a mixed peak corresponding to a mixture wavelength, and the first wavelength is different from the mixture wavelength.

2. The display device of claim 1, wherein a wavelength difference between the first wavelength and the mixture wavelength ranges from 1 nm to 5 nm.

3. The display device of claim 1, wherein the mixture wavelength ranges from 521 nm to 541 nm.

4. The display device of claim 1, wherein an intensity integral of the first output spectrum from 380 nm to 780 nm is defined as a first intensity integral, an intensity integral of the second output spectrum from 494 nm to 580 nm is defined as a second intensity integral, a ratio of the second intensity integral to the first intensity integral is defined as a first ratio, and the first ratio is greater than 0% and less than or equal to 26.0%.

5. The display device of claim 4, further comprising a third display unit, wherein the third display unit emits a third output light under an operation of an highest gray level, the third output light has a third output spectrum, an intensity integral of the third output spectrum from 380 nm to 780 nm is defined as a third intensity integral, a ratio of the second intensity integral to the third intensity integral is defined as a second ratio, and the second ratio is greater than 0% and less than or equal to 28.0%.

6. The display device of claim 1, wherein a maximum peak of the second output spectrum within a range from 494 nm to 580 nm is defined as an adjusting peak corresponding to an adjusting wavelength, and the first wavelength is greater than the adjusting wavelength.

7. The display device of claim 1, wherein an intensity integral of the first output spectrum from 380 nm to 780 nm is defined as a first intensity integral, an intensity integral of the second output spectrum from 511 nm to 597 nm is defined as a fourth intensity integral, a ratio of the fourth intensity integral to the first intensity integral is defined as a third ratio, and the third ratio is greater than 0% and less than or equal to 25.0%.

8. The display device of claim 7, further comprising a third display unit, wherein the third display unit emits a third output light having a third output spectrum corresponding to the highest gray level of the display device, an intensity integral of the third output spectrum from 380 nm to 780 nm is defined as a third intensity integral, a ratio of the fourth intensity integral to the third intensity integral is defined as a fourth ratio, and the fourth ratio is greater than 0% and less than 29.0%.

9. The display device of claim 1, wherein a maximum peak of the second output spectrum within a range from 511 nm to 597 nm is defined as an adjusting peak corresponding to an adjusting wavelength, and the adjusting wavelength is greater than the first wavelength.

10. The display device of claim 1, further comprising:

a first substrate;

a second substrate disposed opposite to the first substrate;

a light modulating layer disposed between the first substrate and the second substrate; and

a backlight module disposed adjacent to the first substrate,

wherein the first display unit and the second display unit respectively comprise a portion of the backlight module and a portion of the light modulating layer.

11. The display device of claim 10, further comprising a light conversion layer, wherein the light conversion layer is disposed between the backlight module and the first substrate or disposed on a surface of the second substrate opposite to the light modulating layer, and the first display unit and the second display unit respectively further comprise a portion of the light conversion layer.

12. The display device of claim 11, wherein the portion of the light conversion layer comprised in the second display unit includes a color adjusting material, and the color adjusting material makes the second output spectrum of the second output light have at least two peaks.

13. The display device of claim 11, wherein the light conversion layer comprises quantum dot or color filter.

14. The display device of claim 1, further comprising:

a substrate;

a circuit disposed on the substrate; and

a plurality of light sources disposed on the substrate and electrically connected to the circuit,

wherein the first display unit and the second display unit respectively comprise one of the light sources and a portion of the circuit.

15. The display device of claim 14, wherein the light source comprised in the second display unit includes a color adjusting material, and the color adjusting material makes the second output spectrum of the second output light have at least two peaks.

16. The display device of claim 14, further comprising a light conversion layer disposed on the light sources or disposed between the light sources and the substrate, wherein the first display unit and the second display unit respectively further comprise a portion of the light conversion layer.

17. The display device of claim 16, wherein the portion of the light conversion layer comprised in the second display unit includes a color adjusting material, and the color adjusting material makes the second output spectrum of the second output light have at least two peaks.

18. The display device of claim 16, wherein the light conversion layer comprises quantum dot or color filter.

19. The display device of claim 1, wherein a maximum peak of the second output spectrum corresponds to a wavelength within a range from 430 nm to 475 nm.

20. The display device of claim 1, wherein a size of the first display unit and a size of the second display unit are different in top view.