# US 11,308,894 B2 · Display device and display panel and manufacturing method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,308,894 B2 - Document ID: US11308894B2 - Status: Granted - Kind: B2 - Application number: 16/889,718 - Filed: 2020-06-01 - Published: 2020-12-17 - Granted: 2022-04-19 - Earliest claimed: 2019-06-12 - Assignees: Innolux Corporation - Applicants: InnoLux Corporation - Inventors: Yu-Chia Huang; Yuan-Lin Wu; Kuan-Feng Lee; Tsung-Han Tsai - Web page: https://patentgrep.com/patent/US11308894B2 ## CPC - G09G 3/3406: {Control of illumination source (illumination devices structurally associated with liquid crystal cells G02F1/1336)} - G02F 1/133305: {Flexible substrates, e.g. plastics, organic film} - G02F 1/133514: {Colour filters} - G02F 1/1339: Gaskets; Spacers; Sealing of cells - G02F 1/134345: {Subdivided pixels, e.g. for grey scale or redundancy} - G09G 3/03: {specially adapted for displays having non-planar surfaces, e.g. curved displays} - G09G 5/10: Intensity circuits - G02F 1/13363: Birefringent elements, e.g. for optical compensation - G02F 2201/56: Substrates having a particular shape, e.g. non-rectangular - G02F 2202/36: Micro- or nanomaterials - G02F 2413/01: Number of plates being 1 - G09G 3/035: {for flexible display surfaces} - G09G 2320/0233: Improving the luminance or brightness uniformity across the screen - G09G 2320/0626: for control of overall brightness - G09G 2320/0666: for control of colour parameters, e.g. colour temperature - G09G 2360/145: the light originating from the display screen - G09G 2380/02: Flexible displays - G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00) - G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS ## Abstract A liquid crystal display, a display panel and a manufacturing method of a display device are disclosed. The liquid crystal display includes a backlight module and a display panel including a first region and a second region with different curvatures. The display panel receives a light from the backlight module, outputs a first light in the first region and outputs a second light in the second region. The first light and the second light respectively have a first normal brightness and a second normal brightness in a normal view angle, and respectively have a first oblique brightness and a second oblique brightness in an oblique view angle. A ratio of a difference between the first normal brightness and the second normal brightness to the first normal brightness is less than a ratio of a difference between the first oblique brightness and the second oblique brightness to the first oblique brightness. ## Claims ### Claim 1 A liquid crystal display, comprising: a backlight module; and a display panel for displaying an image, the display panel comprising a display surface, the display surface comprising a first region with a first curvature and a second region with a second curvature different from the first curvature, the display panel receiving a light from the backlight module, outputting a first light in the first region and outputting a second light in the second region; wherein the first light has a first normal brightness in a normal view angle and a first oblique brightness in an oblique view angle, and the second light has a second normal brightness in the normal view angle and a second oblique brightness in the oblique view angle; wherein a ratio of a difference between the first normal brightness and the second normal brightness to the first normal brightness is defined as a first ratio, a ratio of a difference between the first oblique brightness and the second oblique brightness to the first oblique brightness is defined as a second ratio, and the first ratio is less than the second ratio; and wherein the first light has a first normal chromaticity in the normal view angle and a first oblique chromaticity in the oblique view angle, the second light has a second normal chromaticity in the normal view angle and a second oblique chromaticity in the oblique view angle, an absolute value of a difference between the first normal chromaticity and the second normal chromaticity is defined as an absolute value of a first chromaticity coordinate difference, an absolute value of a difference between the first oblique chromaticity and the second oblique chromaticity is defined as an absolute value of a second chromaticity coordinate difference, and the absolute value of the first chromaticity coordinate difference is less than the absolute value of the second chromaticity coordinate difference. ### Claim 2 (depends on 1) The liquid crystal display according to claim 1, wherein a ratio of the first ratio to the second ratio is greater than or equal to 0.1 and less than 1.0. ### Claim 3 (depends on 1) The liquid crystal display according to claim 1, wherein a difference between the normal view angle and the oblique view angle ranges from 20 to 60 degrees. ### Claim 4 (depends on 1) The liquid crystal display according to claim 1, wherein the first ratio and the second ratio are defined under a wavelength at 550 nm of the lights output from the first region and the second region. ### Claim 5 (depends on 1) The liquid crystal display according to claim 1, wherein a difference of a first radius of the first curvature and a second radius of the second curvature is greater than 10 mm. ### Claim 6 (depends on 1) The liquid crystal display according to claim 1, wherein in a CIE xy chromaticity diagram, the absolute value of the first chromaticity coordinate difference is greater than 0 and less than or equal to three thousandths. ### Claim 7 (depends on 1) The liquid crystal display according to claim 1, wherein in a CIE xy chromaticity diagram, the absolute value of the second chromaticity coordinate difference is greater than 0 and less than or equal to ten thousandths. ### Claim 8 (depends on 1) The liquid crystal display according to claim 1, wherein in a wavelength range of 500 nm to 570 nm, the first ratio is less than the second ratio. ### Claim 9 A display panel for displaying an image, comprising: a display surface comprising a first region with a first curvature; and a second region with a second curvature different from the first curvature, the display panel outputting a first light in the first region and outputting a second light in the second region; wherein the first light has a first normal brightness in a normal view angle and a first oblique brightness in an oblique view angle, and the second light has a second normal brightness in the normal view angle and a second oblique brightness in the oblique view angle; wherein a ratio of a difference between the first normal brightness and the second normal brightness to the first normal brightness is defined as a first ratio, a ratio of a difference between the first oblique brightness and the second oblique brightness to the first oblique brightness is defined as a second ratio, and the first ratio is less than the second ratio; and wherein the first light has a first normal chromaticity in the normal view angle and a first oblique chromaticity in the oblique view angle, the second light has a second normal chromaticity in the normal view angle and a second oblique chromaticity in the oblique view angle, an absolute value of a difference between the first normal chromaticity and the second normal chromaticity is defined as an absolute value of a first chromaticity coordinate difference, an absolute value of a difference between the first oblique chromaticity and the second oblique chromaticity is defined as an absolute value of a second chromaticity coordinate difference, and the absolute value of the first chromaticity coordinate difference is less than the absolute value of the second chromaticity coordinate difference. ### Claim 10 A manufacturing method of a display device, comprising following steps: providing a display device, wherein the display device comprises a display panel for displaying an image, and the display panel comprises a display surface; bending the display panel to make a first region of the display surface of the display panel have a first curvature and a second region of the display surface of the display panel have a second curvature, wherein the second curvature is different from the first curvature; performing brightness measurement to the display panel that has been bent to obtain an absolute value of a normal brightness difference between the first region and the second region, performing chromaticity measurement to the display panel that has been bent to obtain an absolute value of a first chromaticity coordinate difference and an absolute value of a second chromaticity coordinate between the first region and the second region; wherein a first light is outputted in the first region, a second light is outputted in the second region, the first light has a first normal chromaticity in a normal view angle and a first oblique chromaticity in an oblique view angle, and the second light has a second normal chromaticity in the normal view angle and a second oblique chromaticity in the oblique view angle, wherein an absolute value of a difference between the first normal chromaticity and the second normal chromaticity is defined as the absolute value of the first chromaticity coordinate difference, and an absolute value of a difference between the first oblique chromaticity and the second oblique chromaticity is defined as the absolute value of the second chromaticity coordinate difference; and performing an adjustment procedure to reduce the absolute value of the normal brightness difference and to make the absolute value of the first chromaticity coordinate difference less than the absolute value of the second chromaticity coordinate difference.