In order to enable a display image with stable display colors and display brightness to be obtained quickly even when the optical intensity characteristic of a laser light source changes due to a harsh usage environment, a light modulation unit (20) is equipped with: a first light detection unit (40) that modulates the light intensity (L) of composite laser light (C) emitted from a composite laser light emission unit (10), and detects the optical intensity (L) of the composite laser light (C) before entering the light modulation unit (20); and a second light detection unit (41) that detects the optical intensity (L) of the composite laser light (C) after entering the light modulation unit (20). The light intensity characteristic for each color in the composite laser light emission unit (10) is calculated on the basis of the optical intensity (L) detected by the first light detection unit (40), and the white balance of each color in the composite laser light emission unit (10) is adjusted on the basis of the optical intensity (L) detected by the second light detection unit (41).
Laser scanning display device
2015-06-03
Patent
Elektronische Ressource
Englisch
IPC: | G02B Optische Elemente, Systeme oder Geräte , OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / H04N PICTORIAL COMMUNICATION, e.g. TELEVISION , Bildübertragung, z.B. Fernsehen |
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