Prosecution Insights
Last updated: August 16, 2026
Application No. 18/891,075

LIGHT-EMITTING ELEMENT DRIVING DEVICE, LIGHT-EMITTING DEVICE, AND VEHICLE

Non-Final OA §102
Filed
Sep 20, 2024
Priority
Mar 31, 2022 — JP 2022-060073 +1 more
Examiner
SATHIRAJU, SRINIVAS
Art Unit
2844
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
Rohm Co., Ltd.
OA Round
1 (Non-Final)
89%
Grant Probability
Favorable
1-2
OA Rounds
1m
Est. Remaining
95%
With Interview

Examiner Intelligence

Grants 89% — above average
89%
Career Allowance Rate
735 granted / 827 resolved
+20.9% vs TC avg
Moderate +6% lift
Without
With
+6.1%
Interview Lift
resolved cases with interview
Fast prosecutor
2y 0m
Avg Prosecution
39 currently pending
Career history
851
Total Applications
across all art units

Statute-Specific Performance

§101
3.5%
-36.5% vs TC avg
§103
46.5%
+6.5% vs TC avg
§102
17.8%
-22.2% vs TC avg
§112
15.9%
-24.1% vs TC avg
Black line = Tech Center average estimate • Based on career data from 827 resolved cases

Office Action

§102
DETAILED ACTION 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 § 102 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. Claims 1-14 are rejected under 35 U.S.C. 102 (a) (1) as being anticipated by US20170305326 A1 by Kastura et al (Kastura). Referring to claim 1 Kastura Fig 1-11 teaches a light-emitting element driving device (Fig 1 item and abstract) comprising: an error amplifier (See Fig 1 item 4, 11 error amplifiers paragraph [0028]) configured to output a voltage ( item Vout and paragraph [0044]) corresponding to a difference between a voltage corresponding to a current flowing through a light-emitting element and a reference voltage (paragraph [0028] item 1) and to switch between an operating state and a non-operating state according to a control signal (see paragraph [0032] where transistor Q3 is controlled between ON and OFF states); PNG media_image1.png 466 506 media_image1.png Greyscale a driver (item 100) configured to drive, based on an output voltage of the error amplifier (paragraph [0027]), a switching element (item Q3) in a voltage feeder configured to feed a voltage to the light-emitting element (paragraph [0032]); and a suppressor configured, when the error amplifier switches from the non-operating state to the operating state, to suppress a rise in the output voltage of the error amplifier (See paragraphs [0044] [0045] where Kastura discloses the suppressor configured to suppress the raise in voltage of the error amplifiers). Referring to claim 2 Kastura teaches the light-emitting element driving device according to claim 1, wherein the control signal is a PWM dimming signal (see paragraph [0037] where Kastura discloses the PWM light control signal is dimming signal or low level). Referring to claim 3 Kastura teaches the light-emitting element driving device according to claim 1, wherein the suppressor is configured to switch the error amplifier from the non-operating state to the operating state with a delay from a switch of the control signal from a first level to a second level. (See Fig 1, 4 and paragraphs [0046] [0047]). Referring to claim 4 Kastura teaches the light-emitting element driving device according to claim 3, but silent on wherein the delay is a fixed time. However, it is within the scope of ordinary skill to manage the delay time either fixed time or variable. Referring to claim 5 Kastura teaches the light-emitting element driving device according to claim 3, wherein the suppressor keeps the delay until a voltage fed from the voltage feeder to the light-emitting element reaches a set value. (See paragraphs [0047] [0048] where Kastura teaches the delay function of the error amplifier). Referring to claim 6 Kastura teaches the light-emitting element driving device according to claim 3, but silent on wherein the delay is a variable time. However, it is within the scope of ordinary skill to manage the delay time either fixed time or variable. Referring to claim 7 Kastura teaches the light-emitting element driving device according to claim 3, wherein the suppressor is a logic circuit (See paragraph [0032] where Kastura discloses signal fed from a micro-computer). Referring to claim 8 Kastura teaches the light-emitting element driving device according to claim 4, wherein the suppressor is a logic circuit. (See paragraph [0032] where Kastura discloses signal fed from a micro-computer). Referring to claim 9 Kastura teaches the light-emitting element driving device according to claim 5, wherein the suppressor is a logic circuit. (See paragraph [0032] where Kastura discloses signal fed from a micro-computer). Referring to claim 10 Kastura teaches the light-emitting element driving device according to claim 6, wherein the suppressor is a logic circuit. (See paragraph [0032] where Kastura discloses signal fed from a micro-computer). Referring to claim 11 Kastura teaches a light-emitting device comprising: the light-emitting element driving device (Fig 1 item 100 paragraph [0027]) according to claim 1; and the light-emitting element. (See Fig 1, claim 10, 11). Referring to claim 12 Kastura teaches the light-emitting device according to claim 11, further comprising: a sense resistor (Fig 1, 2 item Rs sense resistor) configured to detect a current flowing through the light-emitting element, wherein the light-emitting element and the sense resistor are connected directly in series (paragraph [0027]). Referring to claim 13 Kastura teaches a vehicle (See Fig 8) comprising: the light-emitting device (See paragraph [0054] [0055]) according to claim 11. PNG media_image2.png 384 450 media_image2.png Greyscale Referring to claim 14 Kastura teaches a vehicle (Fig 8)comprising: the light-emitting device (see Fig 9 x 11 paragraph [0055] according to claim 12. Conclusion Claims 1-14 are rejected over prior art. The prior of art made of record and not relied upon is considered to pertinent to applicant’s disclosure. Applicants are directed to consider additional pertinent prior art included on the notice of references cited PTOL 892 attached here with. The examiner has pointed out particular references contained in the prior art of record within the body of this action for the convenience of the Applicants. Although the specified citations are representative of the teachings in the art and are applied to the specific limitations within the individual claim other passages and figures may apply. Applicant, in preparing the response should consider fully the entire reference as potentially teaching all or part of the claimed invention as well as the context of the passage as taught by the prior art or disclosed by the examiner. Any inquiry concerning this communication or earlier communications from the examiner should be directed to SRINIVAS SATHIRAJU whose telephone number is (571)272-4250. The examiner can normally be reached 8:30AM-5.30 PM. 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, Regis J Betsch can be reached at 571-270-7101. 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. /SRINIVAS SATHIRAJU/Examiner, Art Unit 2844 02/06/2026
Read full office action

Prosecution Timeline

Sep 20, 2024
Application Filed
Feb 18, 2026
Non-Final Rejection mailed — §102 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

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Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

1-2
Expected OA Rounds
89%
Grant Probability
95%
With Interview (+6.1%)
2y 0m (~1m remaining)
Median Time to Grant
Low
PTA Risk
Based on 827 resolved cases by this examiner. Grant probability derived from career allowance rate.

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