# US 11,029,908 B2 · Head mounted display apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,029,908 B2 - Document ID: US11029908B2 - Status: Granted - Kind: B2 - Application number: 16/553,196 - Filed: 2019-08-28 - Published: 2021-03-04 - Granted: 2021-06-08 - Earliest claimed: 2019-08-28 - Assignees: Himax Display, Inc. - Applicants: Himax Display, Inc. - Inventors: Chi-Wen Lin; Wen-Hsu Chen; Yuet-Wing Li; Kuan-Hsu Fan Chiang - Web page: https://patentgrep.com/patent/US11029908B2 ## CPC - G02B 27/0172: {characterised by optical features} - G06F 3/1423: {controlling a plurality of local displays, e.g. CRT and flat panel display} - G06F 3/011: {Arrangements for interaction with the human body, e.g. for user immersion in virtual reality (blind teaching G09B21/00)} - G02B 2027/0118: {comprising devices for improving the contrast of the display / brillance control visibility} - G02B 2027/0129: {comprising devices for correcting parallax} - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract A head mounted display (HMD) apparatus is provided. The HMD apparatus includes a first lens, a second lens, a first micro-display disposed on the first lens, a second micro-display disposed on the second lens, a first light source, a second light source, and an eyeglass frame. A first side of the first micro-display corresponding to a first rubbing alignment processing direction and a first side of the second micro-display corresponding to a second rubbing alignment processing direction are symmetric with respect to a center line of the eyeglass frame between the first lens and the second lens. A first incident light emitted by the first light source is obliquely emitted from the first side of the first micro-display toward the first micro-display and a second incident light emitted by the second light source is obliquely emitted from the first side of the second micro-display toward the second micro-display. ## Claims ### Claim 1 A head mounted display (HMD) apparatus, comprising: a first lens and a second lens; a first micro-display disposed on the first lens; a second micro-display disposed on the second lens; a first light source for emitting a first incident light; a second light source for emitting a second incident light; and an eyeglass frame for carrying the first lens, the second lens, the first light source, and the second light source; wherein the first micro-display and the second micro-display are made by symmetric manufacturing processes, such that a first rubbing alignment processing direction of the first micro-display is symmetric to a second rubbing alignment processing direction of the second micro-display, such that a first side of the first micro-display corresponding to the first rubbing alignment processing direction and a first side of the second micro-display corresponding to the second rubbing alignment processing direction are symmetric with respect to a center line of the eyeglass frame between the first lens and the second lens; wherein the first incident light emitted by the first light source is obliquely emitted from the first side of the first micro-display toward the first micro-display and the second incident light emitted by the second light source is obliquely emitted from the first side of the second micro-display toward the second micro-display. ### Claim 2 (depends on 1) The HMD apparatus of claim 1, wherein a difference between the first rubbing alignment processing direction of the first micro-display and the second rubbing alignment processing direction of the second micro-display are 180 degrees. ### Claim 3 (depends on 1) The HMD apparatus of claim 1, wherein a first disposed direction of the first micro-display is the same as a second disposed direction of the second micro-display. ### Claim 4 A head mounted display (HMD) apparatus, comprising: a first lens and a second lens; a first micro-display disposed on the first lens; a second micro-display disposed on the second lens; a first light source for emitting a first incident light; a second light source for emitting a second incident light; and an eyeglass frame for carrying the first lens, the second lens, the first light source, and the second light source; wherein a first disposed direction of the first micro-display is upside-down to a second disposed direction of the second micro-display with respect to a center line of the eyeglass frame between the first lens and the second lens, such that a first side of the first micro-display corresponding a first rubbing alignment processing direction and a first side of the second micro-display corresponding a second rubbing alignment processing direction are symmetric with respect to the center line of the eyeglass frame between the first lens and the second lens; wherein the first incident light emitted by the first light source is obliquely emitted from the first side of the first micro-display toward the first micro-display and the second incident light emitted by the second light source is obliquely emitted from the first side of the second micro-display toward the second micro-display. ### Claim 5 (depends on 4) The HMD apparatus of claim 4, wherein a first data scanning direction of the first micro-display is opposite to a second data scanning direction of the second micro-display. ### Claim 6 (depends on 4) The HMD apparatus of claim 4, wherein the first rubbing alignment processing direction of the first micro-display is same as the second rubbing alignment processing direction of the second micro-display. ### Claim 7 A head mounted display (HMD) apparatus, comprising: a first lens and a second lens; a first micro-display disposed on the first lens; a second micro-display disposed on the second lens; a first light source for emitting a first incident light; a second light source for emitting a second incident light; and an eyeglass frame for carrying the first lens and the second lens; wherein the first micro-display and the second micro-display are made by same manufacturing processes, such that a first rubbing alignment processing direction of the first micro-display is same as a second rubbing alignment processing direction of the second micro-display, such that a first side of the first micro-display corresponding to the first rubbing alignment processing direction and a second side of the second micro-display corresponding to the second rubbing alignment processing direction are symmetric with respect to a center line of the eyeglass frame between the first lens and the second lens; wherein the first incident light emitted by the first light source is obliquely emitted from the first side of the first micro-display toward the first micro-display and the second incident light emitted by the second light source is obliquely emitted from a first side of the second micro-display toward the second micro-display, wherein the first side and the second side of the second micro-display are opposite to each other. ### Claim 8 (depends on 7) The HMD apparatus of claim 7, wherein a first disposed direction of the first micro-display is the same as a second disposed direction of the second micro-display. ### Claim 9 (depends on 7) The HMD apparatus of claim 7, wherein the eyeglass frame is used for carrying the first light source and the second light source, wherein the second incident light emitted by the second light source is guided through a light guide component, such that the second incident light emitted by the second light source may be obliquely emitted from the first side of the second micro-display toward the second micro-display. ### Claim 10 (depends on 7) The HMD apparatus of claim 7, wherein the second light source is disposed to be combined with the second micro-display, such that the second incident light emitted by the second light source may be obliquely emitted from the first side of the second micro-display toward the second micro-display.