Prosecution Insights
Last updated: April 19, 2026
Application No. 18/645,154

HYBRID BACKLIGHTING FOR DISPLAY SCREENS

Non-Final OA §102§103§112
Filed
Apr 24, 2024
Examiner
MAI, THIEN T
Art Unit
2876
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
Pixun Technologies Co.
OA Round
1 (Non-Final)
59%
Grant Probability
Moderate
1-2
OA Rounds
3y 3m
To Grant
80%
With Interview

Examiner Intelligence

Grants 59% of resolved cases
59%
Career Allow Rate
397 granted / 678 resolved
-9.4% vs TC avg
Strong +21% interview lift
Without
With
+21.4%
Interview Lift
resolved cases with interview
Typical timeline
3y 3m
Avg Prosecution
41 currently pending
Career history
719
Total Applications
across all art units

Statute-Specific Performance

§101
8.0%
-32.0% vs TC avg
§103
52.5%
+12.5% vs TC avg
§102
20.1%
-19.9% vs TC avg
§112
15.2%
-24.8% vs TC avg
Black line = Tech Center average estimate • Based on career data from 678 resolved cases

Office Action

§102 §103 §112
Notice of Pre-AIA or AIA Status The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA . Claim Rejections - 35 USC § 112 The following is a quotation of 35 U.S.C. 112(b): (b) CONCLUSION.—The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the inventor or a joint inventor regards as the invention. The following is a quotation of 35 U.S.C. 112 (pre-AIA ), second paragraph: The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the applicant regards as his invention. Claim 5: “the secondary optical element” lacks antecedent basis. Claim 8: the use of “can” is indefinite as it refers to a possibility Claim 10: “the sensor” lacks antecedent basis. Claim 8: the use of “may” is indefinite as it refers to a possibility Claim Rejections - 35 USC § 102 In the event the determination of the status of the application as subject to AIA 35 U.S.C. 102 and 103 (or as subject to pre-AIA 35 U.S.C. 102 and 103) is incorrect, any correction of the statutory basis (i.e., changing from AIA to pre-AIA ) for the rejection will not be considered a new ground of rejection if the prior art relied upon, and the rationale supporting the rejection, would be the same under either status. The following is a quotation of the appropriate paragraphs of 35 U.S.C. 102 that form the basis for the rejections under this section made in this Office action: A person shall be entitled to a patent unless – (a)(1) the claimed invention was patented, described in a printed publication, or in public use, on sale, or otherwise available to the public before the effective filing date of the claimed invention. (a)(2) the claimed invention was described in a patent issued under section 151, or in an application for patent published or deemed published under section 122(b), in which the patent or application, as the case may be, names another inventor and was effectively filed before the effective filing date of the claimed invention. Claim(s) 1-5, 8 is/are rejected under 35 U.S.C. 102a1 as being anticipated by Mohawad (US 20100073791) Mohawad discloses 1. An apparatus for hybrid backlighting of a display screen, comprising: an external light unit (sun 495, par. 54, 58, Fig. 3) configured to illuminate the display screen (112) with light from an external light source; an internal light unit (116, Fig. 1) configured to illuminate the display screen with light from an internal light source; and a display housing member adapted to receive the display screen (Fig. 2); wherein, the apparatus is capable of illuminating the display screen using an external light source, the internal light source, or a combination thereof. 2.1, wherein the external light unit comprises a port configured to receive light from an external light source, said port being capable of connecting to various light delivery systems including optical fiber cables, solar light collector devices, electric light sources, or other external light sources (abstract, par. 65-66). 3.1, wherein the internal light source comprises one or more light emitting elements chosen from the group consisting of incandescent light sources, light emitting diodes, organic light emitting diodes, and other suitable electric light sources (par. 29, 47). 4.1, having a secondary optical element (see manifolds 300, 400, Figs. 3-4) configured to project light from both the external light unit and the internal light unit towards the display screen (par. 57-61, 63-64). 5.1, wherein the secondary optical element has a freeform shape for optimal efficiency and homogeneous light intensity distribution across the display screen (par. 27: “interior surface of a wall portion of the manifold may include reflective material to improve the uniformity of the exiting light by aiming all light reflected within the manifold in one or more specific directions”). 8.1, wherein the display can be configured in various configurations, including but not limited to single display panels, binocular display systems, video walls, or tiled displays (Fig. 2, par. 42). Claim(s) 9-10 is/are rejected under 35 U.S.C. 102a2 as being anticipated by Rodrigues (US 20240176058 ) Rodrigues discloses 9. A method for hybrid backlighting of a display screen, comprising the steps of: obtaining incoming light data from an external light source (abstract, summary, Fig. 3, 8, 10, par. 36, 46, 51); determining a hybrid lighting configuration (Fig. 3, 8, 10, par. 36, 46, 51); controlling filtering configuration for the external light source; and controlling light configuration for the internal light source based on the hybrid lighting configuration (par. 36-38, 56: light sources including ambient source and internal sources are switched and/or supplemented each other in a color-synchronized manner). 10.9, further comprising obtaining light data from the sensor (par. 27, 41). Claim Rejections - 35 USC § 103 The following is a quotation of 35 U.S.C. 103 which forms the basis for all obviousness rejections set forth in this Office action: A patent for a claimed invention may not be obtained, notwithstanding that the claimed invention is not identically disclosed as set forth in section 102, if the differences between the claimed invention and the prior art are such that the claimed invention as a whole would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains. Patentability shall not be negated by the manner in which the invention was made. Claim(s) 6-7 is/are rejected under 35 U.S.C. 103 as being unpatentable over Mohawad (US 20100073791) in view of Zheng (US 20190317258 ) Re claim 6.1, Mohawad is silent to further comprising a dimmer element within the external light unit for adjusting light intensity, spectral composition, or both. Zheng discloses An electronic device may be provided with a color ambient light sensor. The color ambient light sensor may be used to measure an ambient light spectrum over a wavelength range of interest. Control circuitry in the electronic device can take actions based on the measured ambient light spectrum such as adjusting the brightness and color cast of content on a display. A display may have a display cover layer. The color ambient light sensor can be mounted under the display cover layer and may receive ambient light through the display cover layer. The color ambient light sensor may have a tunable wavelength filter such as an electrically adjustable Fabry-Perot resonator. A light collimator may be interposed between the display cover layer and the Fabry-Perot resonator to collimate ambient light that is passed to the Fabry-Perot resonator. A light detector measures the light passing through the Fabry-Perot resonator (abstract) [0030] Color ambient light sensor 31 may have one or more light detectors such as photodiode 36. Photodiode (photodetector) 36 may measure incoming ambient light 38 after light 38 has passed through material 26′, light collimator 30, tunable filter 32, and a fixed wavelength filter such as filter 34 (e.g., an infrared-light-blocking-and-visible-light-transmitting filter). Color ambient light sensor control circuitry such as portions of control circuitry 16 may gather signals from photodiode 36 while sweeping a passband associated with tunable filter 32 across a wavelength range of interest. This allows control circuitry 16 to gather light spectrum measurements on ambient light 38. Therefore, it would have been obvious to one of ordinary skill in the art before the effective date the invention was made to incorporate the teachings of Zheng for providing a better viewing experience on the display. Re claim 7.1, a sensor within the external light unit for measuring light intensity, spectral composition, or both (Zheng, par. 27-30) Claim(s) 11-13 is/are rejected under 35 U.S.C. 103 as being unpatentable over Rodrigues (US 20240176058 ) in view of Zheng (US 20190317258 ) Re claim 11.9, Rodrigues is silent to wherein a filtering configuration for the display screen may also be controlled to optimize spectral output to user needs. Zheng discloses An electronic device may be provided with a color ambient light sensor. The color ambient light sensor may be used to measure an ambient light spectrum over a wavelength range of interest. Control circuitry in the electronic device can take actions based on the measured ambient light spectrum such as adjusting the brightness and color cast of content on a display. A display may have a display cover layer. The color ambient light sensor can be mounted under the display cover layer and may receive ambient light through the display cover layer. The color ambient light sensor may have a tunable wavelength filter such as an electrically adjustable Fabry-Perot resonator. A light collimator may be interposed between the display cover layer and the Fabry-Perot resonator to collimate ambient light that is passed to the Fabry-Perot resonator. A light detector measures the light passing through the Fabry-Perot resonator (abstract) [0030] Color ambient light sensor 31 may have one or more light detectors such as photodiode 36. Photodiode (photodetector) 36 may measure incoming ambient light 38 after light 38 has passed through material 26′, light collimator 30, tunable filter 32, and a fixed wavelength filter such as filter 34 (e.g., an infrared-light-blocking-and-visible-light-transmitting filter). Color ambient light sensor control circuitry such as portions of control circuitry 16 may gather signals from photodiode 36 while sweeping a passband associated with tunable filter 32 across a wavelength range of interest. This allows control circuitry 16 to gather light spectrum measurements on ambient light 38. 12.9, further comprising adjusting the hybrid lighting configuration dynamically based on user settings, environmental parameters, or both (Zheng, abstract, par. 20-22, 33-36) 13.9, wherein the hybrid lighting configuration is determined based on user profiles or preferences regarding visual or physiological effects of light exposure (par. 20-22: user preference causes display 14 becomes yellower in warm condition and bluer in cold ambient condition). Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to THIEN MAI whose telephone number is (571)272-8283. The examiner can normally be reached M-F 8-5pm. Examiner interviews are available via telephone, in-person, and video conferencing using a USPTO supplied web-based collaboration tool. To schedule an interview, applicant is encouraged to use the USPTO Automated Interview Request (AIR) at http://www.uspto.gov/interviewpractice. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Steven Paik can be reached at 571-272-2404. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of published or unpublished applications may be obtained from Patent Center. Unpublished application information in Patent Center is available to registered users. To file and manage patent submissions in Patent Center, visit: https://patentcenter.uspto.gov. Visit https://www.uspto.gov/patents/apply/patent-center for more information about Patent Center and https://www.uspto.gov/patents/docx for information about filing in DOCX format. For additional questions, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. /THIEN T MAI/ Primary Examiner, Art Unit 2876
Read full office action

Prosecution Timeline

Apr 24, 2024
Application Filed
Jul 10, 2024
Response after Non-Final Action
Oct 17, 2025
Non-Final Rejection — §102, §103, §112
Apr 14, 2026
Examiner Interview Summary
Apr 14, 2026
Applicant Interview (Telephonic)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12602963
CASH HANDLING APPARATUS
2y 5m to grant Granted Apr 14, 2026
Patent 12596897
4D Indicium Mapping for Moving Objects
2y 5m to grant Granted Apr 07, 2026
Patent 12518123
ASSEMBLY FOR SHIELDING AT LEAST ONE RADIO-FREQUENCY CHIP AND METHOD FOR MAKING THE SAME
2y 5m to grant Granted Jan 06, 2026
Patent 12511511
DETECTION DEVICE
2y 5m to grant Granted Dec 30, 2025
Patent 12505325
TRANSACTION CARD WITH MULTIPLE ORIENTATIONS
2y 5m to grant Granted Dec 23, 2025
Study what changed to get past this examiner. Based on 5 most recent grants.

AI Strategy Recommendation

Get an AI-powered prosecution strategy using examiner precedents, rejection analysis, and claim mapping.
Powered by AI — typically takes 5-10 seconds

Prosecution Projections

1-2
Expected OA Rounds
59%
Grant Probability
80%
With Interview (+21.4%)
3y 3m
Median Time to Grant
Low
PTA Risk
Based on 678 resolved cases by this examiner. Grant probability derived from career allow rate.

Sign in with your work email

Enter your email to receive a magic link. No password needed.

Personal email addresses (Gmail, Yahoo, etc.) are not accepted.

Free tier: 3 strategy analyses per month