DISPLAY DEVICE AND HEADUP DISPLAY

• Main Authors: MORIYAMA KOHEI, HOMMA KAZUKI
• Format: Patent
• Language: English; Japanese
• Published: 26.07.2018
• Subjects: ADVERTISING; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES; ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES; ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION; AUXILIARY DRIVES FOR VEHICLES; CRYPTOGRAPHY; DISPLAY; EDUCATION; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PERFORMING OPERATIONS; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION; SEALS; TRANSPORTING; VEHICLES IN GENERAL

PROBLEM TO BE SOLVED: To quickly perform desired dimming while suppressing the lowering of display quality.SOLUTION: A dimming part 12 controls a dimming rate D of a laser beam progressing toward a scanning part 20 from a light source 11 on the basis of an inputted dimming value Sd, and when the dimming part 12 changes the dimming rate D, a gradation correction part 32 reduces an added correction value ΔGn continuously and/or stepwise following a gradation value Gn of a pixel Pn of image data in which a time at which the light source 11 emits the laser beam becomes late, and a light source control part 31 adjusts an output level of the light source 11 on the basis of the gradation value Gn which is added with the correction value ΔGn by the gradation control part 32.SELECTED DRAWING: Figure 6 【課題】表示品位の低下を抑えつつ、速やかに所望の調光をする。【解決手段】調光部１２は、入力される調光値Ｓｄに基づいて、光源１１から走査部２０に向かうレーザー光の調光率Ｄを制御し、調光部１２が調光率Ｄを変更する際、階調補正部３２は、光源１１がレーザー光を出射する時間が遅くなる画像データの画素Ｐｎの階調値Ｇｎほど、付加する補正値ΔＧｎを、連続的または／および段階的に小さくしていき、光源制御部３１は、階調補正部３２が補正値ΔＧｎを付加した階調値Ｇｎに基づき、光源１１の出力レベルを調整する。【選択図】図６