# US 10,502,990 B2 · Liquid crystal display comprising first, second, and third pixels having driving voltages for maximum transmittances that are different from each other > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,502,990 B2 - Document ID: US10502990B2 - Status: Granted - Kind: B2 - Application number: 15/008,050 - Filed: 2016-01-27 - Published: 2016-12-22 - Granted: 2019-12-10 - Earliest claimed: 2015-06-22 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Jong Ho Son; Keun Chan Oh; Min-Hee Kim; Kyung Seon Tak; Joon-Hyung Park; Kang Seob Jeong - Web page: https://patentgrep.com/patent/US10502990B2 ## CPC - G02F 1/13306: {Circuit arrangements or driving methods for the control of single liquid crystal cells (G02F1/132, G02F1/133382 take precedence)} - G02F 1/1336: {Illuminating devices} - G02F 1/133621: {providing coloured light (G02F1/133617, G02F1/133533 take precedence)} - G09G 3/3413: {Details of control of colour illumination sources} - G09G 3/3611: {Control of matrices with row and column drivers} - G02F 1/133624: {characterised by their spectral emissions} - G09G 2300/0866: by means of changes in the pixel supply voltage - 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 - 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) ## Abstract A liquid crystal display (LCD) includes: a first pixel configured to emit first light having a first wavelength; a second pixel configured to emit second light having a second wavelength longer than the first wavelength; a third pixel configured to emit third light having a third wavelength longer than the second wavelength; and a liquid crystal (LC) panel in which driving voltages for maximum transmittances for the first light, the second light, and the third light are different from each other. The LCD is configured to apply different voltages to pixel electrodes of the first pixel, the second pixel, and the third pixel, respectively, such that the first light, the second light, and the third light respectively emitted by the first pixel, the second pixel, and the third pixel are transmitted at the respective maximum transmittances. ## Claims ### Claim 1 A liquid crystal display (LCD) comprising: a first pixel configured to emit first light having a first wavelength; a second pixel configured to emit second light having a second wavelength longer than the first wavelength; a third pixel configured to emit third light having a third wavelength longer than the second wavelength; a liquid crystal (LC) panel in which driving voltages for maximum transmittances for the first light, the second light, and the third light are different from each other; and a backlight unit configured to emit backlight to the LC panel, wherein the LCD is configured to apply different voltages to pixel electrodes of the first pixel, the second pixel, and the third pixel, respectively, such that the first light, the second light, and the third light respectively emitted by the first pixel, the second pixel, and the third pixel are transmitted at the respective maximum transmittances, wherein, in the LC panel, the maximum transmittance for the third light is higher than the maximum transmittance for the second light and the maximum transmittance for the first light, and wherein the first wavelength of the backlight of the backlight unit has the highest intensity. ### Claim 2 (depends on 1) The LCD of claim 1, wherein in the LC panel, the maximum transmittance for the second light is higher than the maximum transmittance for the first light. ### Claim 3 (depends on 1) The LCD of claim 1, wherein the backlight of the backlight unit is recognized as light representing a color corresponding to the first wavelength. ### Claim 4 (depends on 1) The LCD of claim 1, wherein the third wavelength of the backlight of the backlight unit has the lowest intensity. ### Claim 5 (depends on 1) The LCD of claim 1, wherein the first light exhibits blue color, the second light exhibits green color, and the third light exhibits red color. ### Claim 6 A liquid crystal display (LCD) comprising: a first pixel configured to emit first light having a first wavelength; a second pixel configured to emit second light having a second wavelength longer than the first wavelength; a third pixel configured to emit third light having a third wavelength longer than the second wavelength; and a liquid crystal (LC) panel in which driving voltages for maximum transmittances for the first light, the second light, and the third light are different from each other, wherein the LCD is configured to apply different voltages to pixel electrodes of the first pixel, the second pixel, and the third pixel, respectively, such that the first light, the second light, and the third light respectively emitted by the first pixel, the second pixel, and the third pixel are transmitted at the respective maximum transmittances, wherein, in the LC panel, the maximum transmittance for the third light is higher than the maximum transmittance for the second light and the maximum transmittance for the first light, and wherein a voltage applied to the pixel electrode of the third pixel is higher than a voltage applied to the pixel electrode of the second pixel, and the voltage applied to the pixel electrode of the second pixel is higher than a voltage applied to the pixel electrode of the first pixel. ### Claim 7 (depends on 1) The LCD of claim 1, wherein a voltage applied to the pixel electrode of the first pixel is higher than a voltage applied to the pixel electrode of the second pixel, and the voltage applied to the pixel electrode of the second pixel is higher than a voltage applied to the pixel electrode of the third pixel. ### Claim 8 A liquid crystal display (LCD) comprising: a first pixel configured to emit first light having a first wavelength; a second pixel configured to emit second light having a second wavelength longer than the first wavelength; a third pixel configured to emit third light having a third wavelength longer than the second wavelength; a liquid crystal (LC) panel in which maximum transmittances for the first light, the second light, and the third light are different from each other; and a backlight unit configured to provide backlight to the LC panel, wherein a light with the greatest maximum transmittances among the first light, the second light, and the third light has the lowest intensity of the wavelength of the backlight provided by the backlight unit, and a light with the smallest maximum transmittances has the highest intensity of the wavelength of the backlight provided by the backlight unit. ### Claim 9 (depends on 8) The LCD of claim 8, wherein the backlight provided by the backlight unit exhibits light blue color. ### Claim 10 (depends on 8) The LCD of claim 8, wherein driving voltages for the maximum transmittances for the first light, the second light, and the third light are different from each other. ### Claim 11 (depends on 10) The LCD of claim 10, wherein the LCD is configured to apply different voltages to pixel electrodes of the first pixel, the second pixel, and the third pixel such that the different voltages drive the first pixel, the second pixel, and the third pixel at the respective maximum transmittances. ### Claim 12 (depends on 8) The LCD of claim 8, wherein the first wavelength comprises at least one wavelength in a range of about 400 nm to about 530 nm, the second wavelength comprises at least one wavelength in a range of about 520 nm to about 570 nm, and the third wavelength comprises at least one wavelength in a range of about 560 nm to about 640 nm. ### Claim 13 (depends on 8) The LCD of claim 8, wherein the first light exhibits blue color, the second light exhibits green color, and the third light exhibits red color.